Vergleich admin/jscripts/codemirror/lib/codemirror.js - 1.8.12 - 1.8.13

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// You can find some technical background for some of the code below
// at http://marijnhaverbeke.nl/blog/#cm-internals .


// You can find some technical background for some of the code below
// at http://marijnhaverbeke.nl/blog/#cm-internals .


(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
module.exports = mod();
else if (typeof define == "function" && define.amd) // AMD
return define([], mod);
else // Plain browser env
this.CodeMirror = mod();
})(function() {
"use strict";

(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.CodeMirror = factory());
}(this, (function () { 'use strict';









  // BROWSER SNIFFING




// Kludges for bugs and behavior differences that can't be feature
// detected are enabled based on userAgent etc sniffing.
var userAgent = navigator.userAgent
var platform = navigator.platform





  // Kludges for bugs and behavior differences that can't be feature
// detected are enabled based on userAgent etc sniffing.












var gecko = /gecko\/\d/i.test(userAgent)
var ie_upto10 = /MSIE \d/.test(userAgent)
var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent)
var edge = /Edge\/(\d+)/.exec(userAgent)
var ie = ie_upto10 || ie_11up || edge
var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1])
var webkit = !edge && /WebKit\//.test(userAgent)
var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent)
var chrome = !edge && /Chrome\//.test(userAgent)
var presto = /Opera\//.test(userAgent)
var safari = /Apple Computer/.test(navigator.vendor)
var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent)
var phantom = /PhantomJS/.test(userAgent)





  var gecko = /gecko\/\d/i.test(navigator.userAgent);
// ie_uptoN means Internet Explorer version N or lower
var ie_upto10 = /MSIE \d/.test(navigator.userAgent);
var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(navigator.userAgent);
var ie = ie_upto10 || ie_11up;
var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up[1]);
var webkit = /WebKit\//.test(navigator.userAgent);
var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
var chrome = /Chrome\//.test(navigator.userAgent);
var presto = /Opera\//.test(navigator.userAgent);
var safari = /Apple Computer/.test(navigator.vendor);
var khtml = /KHTML\//.test(navigator.userAgent);
var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
var phantom = /PhantomJS/.test(navigator.userAgent);

var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent)
var android = /Android/.test(userAgent)
// This is woefully incomplete. Suggestions for alternative methods welcome.
var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent)
var mac = ios || /Mac/.test(platform)
var chromeOS = /\bCrOS\b/.test(userAgent)
var windows = /win/i.test(platform)












  var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
// This is woefully incomplete. Suggestions for alternative methods welcome.
var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent);
var mac = ios || /Mac/.test(navigator.platform);
var windows = /win/i.test(navigator.platform);


var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/)
if (presto_version) { presto_version = Number(presto_version[1]) }
if (presto_version && presto_version >= 15) { presto = false; webkit = true }
// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11))
var captureRightClick = gecko || (ie && ie_version >= 9)





  var presto_version = presto && navigator.userAgent.match(/Version\/(\d*\.\d*)/);
if (presto_version) presto_version = Number(presto_version[1]);
if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
var captureRightClick = gecko || (ie && ie_version >= 9);

function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }










  // Optimize some code when these features are not used.
var sawReadOnlySpans = false, sawCollapsedSpans = false;







var rmClass = function(node, cls) {
var current = node.className
var match = classTest(cls).exec(current)
if (match) {
var after = current.slice(match.index + match[0].length)
node.className = current.slice(0, match.index) + (after ? match[1] + after : "")
}
}





  // EDITOR CONSTRUCTOR





function removeChildren(e) {
for (var count = e.childNodes.length; count > 0; --count)
{ e.removeChild(e.firstChild) }
return e
}





  // A CodeMirror instance represents an editor. This is the object
// that user code is usually dealing with.


function removeChildrenAndAdd(parent, e) {
return removeChildren(parent).appendChild(e)
}





  function CodeMirror(place, options) {
if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);













function elt(tag, content, className, style) {
var e = document.createElement(tag)
if (className) { e.className = className }
if (style) { e.style.cssText = style }
if (typeof content == "string") { e.appendChild(document.createTextNode(content)) }
else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]) } }
return e
}
// wrapper for elt, which removes the elt from the accessibility tree
function eltP(tag, content, className, style) {
var e = elt(tag, content, className, style)
e.setAttribute("role", "presentation")
return e
}





    this.options = options = options ? copyObj(options) : {};
// Determine effective options based on given values and defaults.
copyObj(defaults, options, false);
setGuttersForLineNumbers(options);













var range
if (document.createRange) { range = function(node, start, end, endNode) {
var r = document.createRange()
r.setEnd(endNode || node, end)
r.setStart(node, start)
return r
} }
else { range = function(node, start, end) {
var r = document.body.createTextRange()
try { r.moveToElementText(node.parentNode) }
catch(e) { return r }
r.collapse(true)
r.moveEnd("character", end)
r.moveStart("character", start)
return r
} }





    var doc = options.value;
if (typeof doc == "string") doc = new Doc(doc, options.mode);
this.doc = doc;








function contains(parent, child) {
if (child.nodeType == 3) // Android browser always returns false when child is a textnode
{ child = child.parentNode }
if (parent.contains)
{ return parent.contains(child) }
do {
if (child.nodeType == 11) { child = child.host }
if (child == parent) { return true }
} while (child = child.parentNode)
}





    var display = this.display = new Display(place, doc);
display.wrapper.CodeMirror = this;
updateGutters(this);
themeChanged(this);
if (options.lineWrapping)
this.display.wrapper.className += " CodeMirror-wrap";
if (options.autofocus && !mobile) focusInput(this);
initScrollbars(this);







function activeElt() {
// IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
// IE < 10 will throw when accessed while the page is loading or in an iframe.
// IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
var activeElement
try {
activeElement = document.activeElement
} catch(e) {
activeElement = document.body || null
}
while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
{ activeElement = activeElement.shadowRoot.activeElement }
return activeElement
}





    this.state = {
keyMaps: [], // stores maps added by addKeyMap
overlays: [], // highlighting overlays, as added by addOverlay
modeGen: 0, // bumped when mode/overlay changes, used to invalidate highlighting info
overwrite: false, focused: false,
suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in readInput
draggingText: false,
highlight: new Delayed(), // stores highlight worker timeout
keySeq: null // Unfinished key sequence
};

function addClass(node, cls) {
var current = node.className
if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls }
}
function joinClasses(a, b) {
var as = a.split(" ")
for (var i = 0; i < as.length; i++)
{ if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i] } }
return b
}






    // Override magic textarea content restore that IE sometimes does
// on our hidden textarea on reload
if (ie && ie_version < 11) setTimeout(bind(resetInput, this, true), 20);



var selectInput = function(node) { node.select() }
if (ios) // Mobile Safari apparently has a bug where select() is broken.
{ selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length } }
else if (ie) // Suppress mysterious IE10 errors
{ selectInput = function(node) { try { node.select() } catch(_e) {} } }





    registerEventHandlers(this);
ensureGlobalHandlers();



function bind(f) {
var args = Array.prototype.slice.call(arguments, 1)
return function(){return f.apply(null, args)}
}





    startOperation(this);
this.curOp.forceUpdate = true;
attachDoc(this, doc);





function copyObj(obj, target, overwrite) {
if (!target) { target = {} }
for (var prop in obj)
{ if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
{ target[prop] = obj[prop] } }
return target
}





    if ((options.autofocus && !mobile) || activeElt() == display.input)
setTimeout(bind(onFocus, this), 20);
else
onBlur(this);

for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
optionHandlers[opt](this, options[opt], Init);
maybeUpdateLineNumberWidth(this);
for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
endOperation(this);
// Suppress optimizelegibility in Webkit, since it breaks text
// measuring on line wrapping boundaries.
if (webkit && options.lineWrapping &&
getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
display.lineDiv.style.textRendering = "auto";

// Counts the column offset in a string, taking tabs into account.
// Used mostly to find indentation.
function countColumn(string, end, tabSize, startIndex, startValue) {
if (end == null) {
end = string.search(/[^\s\u00a0]/)
if (end == -1) { end = string.length }










  }

  }

 
  for (var i = startIndex || 0, n = startValue || 0;;) {
var nextTab = string.indexOf("\t", i)
if (nextTab < 0 || nextTab >= end)
{ return n + (end - i) }
n += nextTab - i
n += tabSize - (n % tabSize)
i = nextTab + 1
}
}





  // DISPLAY CONSTRUCTOR





var Delayed = function() {this.id = null};
Delayed.prototype.set = function (ms, f) {
clearTimeout(this.id)
this.id = setTimeout(f, ms)
};





  // The display handles the DOM integration, both for input reading
// and content drawing. It holds references to DOM nodes and
// display-related state.



function indexOf(array, elt) {
for (var i = 0; i < array.length; ++i)
{ if (array[i] == elt) { return i } }
return -1
}





  function Display(place, doc) {
var d = this;

// Number of pixels added to scroller and sizer to hide scrollbar
var scrollerGap = 30





    // The semihidden textarea that is focused when the editor is
// focused, and receives input.
var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none");
// The textarea is kept positioned near the cursor to prevent the
// fact that it'll be scrolled into view on input from scrolling
// our fake cursor out of view. On webkit, when wrap=off, paste is
// very slow. So make the area wide instead.
if (webkit) input.style.width = "1000px";
else input.setAttribute("wrap", "off");
// If border: 0; -- iOS fails to open keyboard (issue #1287)
if (ios) input.style.border = "1px solid black";
input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off"); input.setAttribute("spellcheck", "false");

// Returned or thrown by various protocols to signal 'I'm not
// handling this'.
var Pass = {toString: function(){return "CodeMirror.Pass"}}














    // Wraps and hides input textarea
d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
// Covers bottom-right square when both scrollbars are present.
d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
d.scrollbarFiller.setAttribute("not-content", "true");
// Covers bottom of gutter when coverGutterNextToScrollbar is on
// and h scrollbar is present.
d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
d.gutterFiller.setAttribute("not-content", "true");
// Will contain the actual code, positioned to cover the viewport.
d.lineDiv = elt("div", null, "CodeMirror-code");
// Elements are added to these to represent selection and cursors.
d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
d.cursorDiv = elt("div", null, "CodeMirror-cursors");
// A visibility: hidden element used to find the size of things.
d.measure = elt("div", null, "CodeMirror-measure");
// When lines outside of the viewport are measured, they are drawn in this.
d.lineMeasure = elt("div", null, "CodeMirror-measure");
// Wraps everything that needs to exist inside the vertically-padded coordinate system
d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
null, "position: relative; outline: none");
// Moved around its parent to cover visible view.
d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
// Set to the height of the document, allowing scrolling.
d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
d.sizerWidth = null;
// Behavior of elts with overflow: auto and padding is
// inconsistent across browsers. This is used to ensure the
// scrollable area is big enough.
d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
// Will contain the gutters, if any.
d.gutters = elt("div", null, "CodeMirror-gutters");
d.lineGutter = null;
// Actual scrollable element.
d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
d.scroller.setAttribute("tabIndex", "-1");
// The element in which the editor lives.
d.wrapper = elt("div", [d.inputDiv, d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");

// Reused option objects for setSelection & friends
var sel_dontScroll = {scroll: false};
var sel_mouse = {origin: "*mouse"};
var sel_move = {origin: "+move"};
// The inverse of countColumn -- find the offset that corresponds to
// a particular column.
function findColumn(string, goal, tabSize) {
for (var pos = 0, col = 0;;) {
var nextTab = string.indexOf("\t", pos)
if (nextTab == -1) { nextTab = string.length }
var skipped = nextTab - pos
if (nextTab == string.length || col + skipped >= goal)
{ return pos + Math.min(skipped, goal - col) }
col += nextTab - pos
col += tabSize - (col % tabSize)
pos = nextTab + 1
if (col >= goal) { return pos }
}
}
























    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
// Needed to hide big blue blinking cursor on Mobile Safari
if (ios) input.style.width = "0px";
if (!webkit) d.scroller.draggable = true;
// Needed to handle Tab key in KHTML
if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; }

var spaceStrs = [""]
function spaceStr(n) {
while (spaceStrs.length <= n)
{ spaceStrs.push(lst(spaceStrs) + " ") }
return spaceStrs[n]
}






    if (place) {
if (place.appendChild) place.appendChild(d.wrapper);
else place(d.wrapper);
}

function lst(arr) { return arr[arr.length-1] }








    // Current rendered range (may be bigger than the view window).
d.viewFrom = d.viewTo = doc.first;
d.reportedViewFrom = d.reportedViewTo = doc.first;
// Information about the rendered lines.
d.view = [];
d.renderedView = null;
// Holds info about a single rendered line when it was rendered
// for measurement, while not in view.
d.externalMeasured = null;
// Empty space (in pixels) above the view
d.viewOffset = 0;
d.lastWrapHeight = d.lastWrapWidth = 0;
d.updateLineNumbers = null;

function map(array, f) {
var out = []
for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i) }
return out
}













    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
d.scrollbarsClipped = false;




function insertSorted(array, value, score) {
var pos = 0, priority = score(value)
while (pos < array.length && score(array[pos]) <= priority) { pos++ }
array.splice(pos, 0, value)
}





    // Used to only resize the line number gutter when necessary (when
// the amount of lines crosses a boundary that makes its width change)
d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
// See readInput and resetInput
d.prevInput = "";
// Set to true when a non-horizontal-scrolling line widget is
// added. As an optimization, line widget aligning is skipped when
// this is false.
d.alignWidgets = false;
// Flag that indicates whether we expect input to appear real soon
// now (after some event like 'keypress' or 'input') and are
// polling intensively.
d.pollingFast = false;
// Self-resetting timeout for the poller
d.poll = new Delayed();

function nothing() {}



















    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;











function createObj(base, props) {
var inst
if (Object.create) {
inst = Object.create(base)
} else {
nothing.prototype = base
inst = new nothing()
}
if (props) { copyObj(props, inst) }
return inst
}





    // Tracks when resetInput has punted to just putting a short
// string into the textarea instead of the full selection.
d.inaccurateSelection = false;








var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/
function isWordCharBasic(ch) {
return /\w/.test(ch) || ch > "\x80" &&
(ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
}
function isWordChar(ch, helper) {
if (!helper) { return isWordCharBasic(ch) }
if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
return helper.test(ch)
}





    // Tracks the maximum line length so that the horizontal scrollbar
// can be kept static when scrolling.
d.maxLine = null;
d.maxLineLength = 0;
d.maxLineChanged = false;

function isEmpty(obj) {
for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
return true
}






    // Used for measuring wheel scrolling granularity
d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;






// Extending unicode characters. A series of a non-extending char +
// any number of extending chars is treated as a single unit as far
// as editing and measuring is concerned. This is not fully correct,
// since some scripts/fonts/browsers also treat other configurations
// of code points as a group.
var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/
function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }





    // True when shift is held down.
d.shift = false;




// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
function skipExtendingChars(str, pos, dir) {
while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir }
return pos
}





    // Used to track whether anything happened since the context menu
// was opened.
d.selForContextMenu = null;











// Returns the value from the range [`from`; `to`] that satisfies
// `pred` and is closest to `from`. Assumes that at least `to`
// satisfies `pred`. Supports `from` being greater than `to`.
function findFirst(pred, from, to) {
// At any point we are certain `to` satisfies `pred`, don't know
// whether `from` does.
var dir = from > to ? -1 : 1
for (;;) {
if (from == to) { return from }
var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF)
if (mid == from) { return pred(mid) ? from : to }
if (pred(mid)) { to = mid }
else { from = mid + dir }

  }

  }

 
}





  // STATE UPDATES



// The display handles the DOM integration, both for input reading
// and content drawing. It holds references to DOM nodes and
// display-related state.





  // Used to get the editor into a consistent state again when options change.



function Display(place, doc, input) {
var d = this
this.input = input





  function loadMode(cm) {
cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
resetModeState(cm);
}


































  // Covers bottom-right square when both scrollbars are present.
d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler")
d.scrollbarFiller.setAttribute("cm-not-content", "true")
// Covers bottom of gutter when coverGutterNextToScrollbar is on
// and h scrollbar is present.
d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler")
d.gutterFiller.setAttribute("cm-not-content", "true")
// Will contain the actual code, positioned to cover the viewport.
d.lineDiv = eltP("div", null, "CodeMirror-code")
// Elements are added to these to represent selection and cursors.
d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1")
d.cursorDiv = elt("div", null, "CodeMirror-cursors")
// A visibility: hidden element used to find the size of things.
d.measure = elt("div", null, "CodeMirror-measure")
// When lines outside of the viewport are measured, they are drawn in this.
d.lineMeasure = elt("div", null, "CodeMirror-measure")
// Wraps everything that needs to exist inside the vertically-padded coordinate system
d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
null, "position: relative; outline: none")
var lines = eltP("div", [d.lineSpace], "CodeMirror-lines")
// Moved around its parent to cover visible view.
d.mover = elt("div", [lines], null, "position: relative")
// Set to the height of the document, allowing scrolling.
d.sizer = elt("div", [d.mover], "CodeMirror-sizer")
d.sizerWidth = null
// Behavior of elts with overflow: auto and padding is
// inconsistent across browsers. This is used to ensure the
// scrollable area is big enough.
d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;")
// Will contain the gutters, if any.
d.gutters = elt("div", null, "CodeMirror-gutters")
d.lineGutter = null
// Actual scrollable element.
d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll")
d.scroller.setAttribute("tabIndex", "-1")
// The element in which the editor lives.
d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror")





  function resetModeState(cm) {
cm.doc.iter(function(line) {
if (line.stateAfter) line.stateAfter = null;
if (line.styles) line.styles = null;
});
cm.doc.frontier = cm.doc.first;
startWorker(cm, 100);
cm.state.modeGen++;
if (cm.curOp) regChange(cm);
}

  // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0 }
if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true }












  function wrappingChanged(cm) {
if (cm.options.lineWrapping) {
addClass(cm.display.wrapper, "CodeMirror-wrap");
cm.display.sizer.style.minWidth = "";
cm.display.sizerWidth = null;
} else {
rmClass(cm.display.wrapper, "CodeMirror-wrap");
findMaxLine(cm);
}
estimateLineHeights(cm);
regChange(cm);
clearCaches(cm);
setTimeout(function(){updateScrollbars(cm);}, 100);

  if (place) {
if (place.appendChild) { place.appendChild(d.wrapper) }
else { place(d.wrapper) }











  }


  }


  // Returns a function that estimates the height of a line, to use as
// first approximation until the line becomes visible (and is thus
// properly measurable).
function estimateHeight(cm) {
var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
return function(line) {
if (lineIsHidden(cm.doc, line)) return 0;






  // Current rendered range (may be bigger than the view window).
d.viewFrom = d.viewTo = doc.first
d.reportedViewFrom = d.reportedViewTo = doc.first
// Information about the rendered lines.
d.view = []
d.renderedView = null
// Holds info about a single rendered line when it was rendered
// for measurement, while not in view.
d.externalMeasured = null
// Empty space (in pixels) above the view
d.viewOffset = 0
d.lastWrapHeight = d.lastWrapWidth = 0
d.updateLineNumbers = null





      var widgetsHeight = 0;
if (line.widgets) for (var i = 0; i < line.widgets.length; i++) {
if (line.widgets[i].height) widgetsHeight += line.widgets[i].height;
}

  d.nativeBarWidth = d.barHeight = d.barWidth = 0
d.scrollbarsClipped = false







      if (wrapping)
return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th;
else
return widgetsHeight + th;
};
}


  // Used to only resize the line number gutter when necessary (when
// the amount of lines crosses a boundary that makes its width change)
d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null
// Set to true when a non-horizontal-scrolling line widget is
// added. As an optimization, line widget aligning is skipped when
// this is false.
d.alignWidgets = false





  function estimateLineHeights(cm) {
var doc = cm.doc, est = estimateHeight(cm);
doc.iter(function(line) {
var estHeight = est(line);
if (estHeight != line.height) updateLineHeight(line, estHeight);
});
}

  d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null











  function themeChanged(cm) {
cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
clearCaches(cm);
}

  // Tracks the maximum line length so that the horizontal scrollbar
// can be kept static when scrolling.
d.maxLine = null
d.maxLineLength = 0
d.maxLineChanged = false





  function guttersChanged(cm) {
updateGutters(cm);
regChange(cm);
setTimeout(function(){alignHorizontally(cm);}, 20);
}

  // Used for measuring wheel scrolling granularity
d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null








  // Rebuild the gutter elements, ensure the margin to the left of the
// code matches their width.
function updateGutters(cm) {
var gutters = cm.display.gutters, specs = cm.options.gutters;
removeChildren(gutters);
for (var i = 0; i < specs.length; ++i) {
var gutterClass = specs[i];
var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
if (gutterClass == "CodeMirror-linenumbers") {
cm.display.lineGutter = gElt;
gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
}
}
gutters.style.display = i ? "" : "none";
updateGutterSpace(cm);
}

  // True when shift is held down.
d.shift = false



















  function updateGutterSpace(cm) {
var width = cm.display.gutters.offsetWidth;
cm.display.sizer.style.marginLeft = width + "px";
}

  // Used to track whether anything happened since the context menu
// was opened.
d.selForContextMenu = null






  // Compute the character length of a line, taking into account
// collapsed ranges (see markText) that might hide parts, and join
// other lines onto it.
function lineLength(line) {
if (line.height == 0) return 0;
var len = line.text.length, merged, cur = line;
while (merged = collapsedSpanAtStart(cur)) {
var found = merged.find(0, true);
cur = found.from.line;
len += found.from.ch - found.to.ch;
}
cur = line;
while (merged = collapsedSpanAtEnd(cur)) {
var found = merged.find(0, true);
len -= cur.text.length - found.from.ch;
cur = found.to.line;
len += cur.text.length - found.to.ch;

  d.activeTouch = null

input.init(d)
}

// Find the line object corresponding to the given line number.
function getLine(doc, n) {
n -= doc.first
if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
var chunk = doc
while (!chunk.lines) {
for (var i = 0;; ++i) {
var child = chunk.children[i], sz = child.chunkSize()
if (n < sz) { chunk = child; break }
n -= sz



    }

    }

    return len;

 
  }

  }

 
  return chunk.lines[n]
}





  // Find the longest line in the document.
function findMaxLine(cm) {
var d = cm.display, doc = cm.doc;
d.maxLine = getLine(doc, doc.first);
d.maxLineLength = lineLength(d.maxLine);
d.maxLineChanged = true;
doc.iter(function(line) {
var len = lineLength(line);
if (len > d.maxLineLength) {
d.maxLineLength = len;
d.maxLine = line;
}
});
}













// Get the part of a document between two positions, as an array of
// strings.
function getBetween(doc, start, end) {
var out = [], n = start.line
doc.iter(start.line, end.line + 1, function (line) {
var text = line.text
if (n == end.line) { text = text.slice(0, end.ch) }
if (n == start.line) { text = text.slice(start.ch) }
out.push(text)
++n
})
return out
}
// Get the lines between from and to, as array of strings.
function getLines(doc, from, to) {
var out = []
doc.iter(from, to, function (line) { out.push(line.text) }) // iter aborts when callback returns truthy value
return out
}

// Update the height of a line, propagating the height change
// upwards to parent nodes.
function updateLineHeight(line, height) {
var diff = height - line.height
if (diff) { for (var n = line; n; n = n.parent) { n.height += diff } }
}





  // Make sure the gutters options contains the element
// "CodeMirror-linenumbers" when the lineNumbers option is true.
function setGuttersForLineNumbers(options) {
var found = indexOf(options.gutters, "CodeMirror-linenumbers");
if (found == -1 && options.lineNumbers) {
options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
} else if (found > -1 && !options.lineNumbers) {
options.gutters = options.gutters.slice(0);
options.gutters.splice(found, 1);

// Given a line object, find its line number by walking up through
// its parent links.
function lineNo(line) {
if (line.parent == null) { return null }
var cur = line.parent, no = indexOf(cur.lines, line)
for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
for (var i = 0;; ++i) {
if (chunk.children[i] == cur) { break }
no += chunk.children[i].chunkSize()

    }
}

    }
}

 
  return no + cur.first
}





  // SCROLLBARS

// Prepare DOM reads needed to update the scrollbars. Done in one
// shot to minimize update/measure roundtrips.
function measureForScrollbars(cm) {
var d = cm.display, gutterW = d.gutters.offsetWidth;
var docH = Math.round(cm.doc.height + paddingVert(cm.display));
return {
clientHeight: d.scroller.clientHeight,
viewHeight: d.wrapper.clientHeight,
scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
viewWidth: d.wrapper.clientWidth,
barLeft: cm.options.fixedGutter ? gutterW : 0,
docHeight: docH,
scrollHeight: docH + scrollGap(cm) + d.barHeight,
nativeBarWidth: d.nativeBarWidth,
gutterWidth: gutterW
};

// Find the line at the given vertical position, using the height
// information in the document tree.
function lineAtHeight(chunk, h) {
var n = chunk.first
outer: do {
for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
var child = chunk.children[i$1], ch = child.height
if (h < ch) { chunk = child; continue outer }
h -= ch
n += child.chunkSize()
}
return n
} while (!chunk.lines)
var i = 0
for (; i < chunk.lines.length; ++i) {
var line = chunk.lines[i], lh = line.height
if (h < lh) { break }
h -= lh

  }

  }

 
  return n + i
}





  function NativeScrollbars(place, scroll, cm) {
this.cm = cm;
var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
place(vert); place(horiz);

function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}









    on(vert, "scroll", function() {
if (vert.clientHeight) scroll(vert.scrollTop, "vertical");
});
on(horiz, "scroll", function() {
if (horiz.clientWidth) scroll(horiz.scrollLeft, "horizontal");
});

function lineNumberFor(options, i) {
return String(options.lineNumberFormatter(i + options.firstLineNumber))
}








    this.checkedOverlay = false;
// Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
if (ie && ie_version < 8) this.horiz.style.minHeight = this.vert.style.minWidth = "18px";
}

// A Pos instance represents a position within the text.
function Pos(line, ch, sticky) {
if ( sticky === void 0 ) sticky = null;






  NativeScrollbars.prototype = copyObj({
update: function(measure) {
var needsH = measure.scrollWidth > measure.clientWidth + 1;
var needsV = measure.scrollHeight > measure.clientHeight + 1;
var sWidth = measure.nativeBarWidth;

  if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
this.line = line
this.ch = ch
this.sticky = sticky
}





      if (needsV) {
this.vert.style.display = "block";
this.vert.style.bottom = needsH ? sWidth + "px" : "0";
var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
// A bug in IE8 can cause this value to be negative, so guard it.
this.vert.firstChild.style.height =
Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
} else {
this.vert.style.display = "";
this.vert.firstChild.style.height = "0";
}

// Compare two positions, return 0 if they are the same, a negative
// number when a is less, and a positive number otherwise.
function cmp(a, b) { return a.line - b.line || a.ch - b.ch }













      if (needsH) {
this.horiz.style.display = "block";
this.horiz.style.right = needsV ? sWidth + "px" : "0";
this.horiz.style.left = measure.barLeft + "px";
var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
this.horiz.firstChild.style.width =
(measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
} else {
this.horiz.style.display = "";
this.horiz.firstChild.style.width = "0";
}

function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }















      if (!this.checkedOverlay && measure.clientHeight > 0) {
if (sWidth == 0) this.overlayHack();
this.checkedOverlay = true;
}

function copyPos(x) {return Pos(x.line, x.ch)}
function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
function minPos(a, b) { return cmp(a, b) < 0 ? a : b }






      return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0};
},
setScrollLeft: function(pos) {
if (this.horiz.scrollLeft != pos) this.horiz.scrollLeft = pos;
},
setScrollTop: function(pos) {
if (this.vert.scrollTop != pos) this.vert.scrollTop = pos;
},
overlayHack: function() {
var w = mac && !mac_geMountainLion ? "12px" : "18px";
this.horiz.style.minHeight = this.vert.style.minWidth = w;
var self = this;
var barMouseDown = function(e) {
if (e_target(e) != self.vert && e_target(e) != self.horiz)
operation(self.cm, onMouseDown)(e);
};
on(this.vert, "mousedown", barMouseDown);
on(this.horiz, "mousedown", barMouseDown);
},
clear: function() {
var parent = this.horiz.parentNode;
parent.removeChild(this.horiz);
parent.removeChild(this.vert);
}
}, NativeScrollbars.prototype);

// Most of the external API clips given positions to make sure they
// actually exist within the document.
function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
function clipPos(doc, pos) {
if (pos.line < doc.first) { return Pos(doc.first, 0) }
var last = doc.first + doc.size - 1
if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
return clipToLen(pos, getLine(doc, pos.line).text.length)
}
function clipToLen(pos, linelen) {
var ch = pos.ch
if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
else if (ch < 0) { return Pos(pos.line, 0) }
else { return pos }
}
function clipPosArray(doc, array) {
var out = []
for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]) }
return out
}










  function NullScrollbars() {}






// Optimize some code when these features are not used.
var sawReadOnlySpans = false;
var sawCollapsedSpans = false;
function seeReadOnlySpans() {
sawReadOnlySpans = true
}





  NullScrollbars.prototype = copyObj({
update: function() { return {bottom: 0, right: 0}; },
setScrollLeft: function() {},
setScrollTop: function() {},
clear: function() {}
}, NullScrollbars.prototype);

function seeCollapsedSpans() {
sawCollapsedSpans = true
}








  CodeMirror.scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};

// TEXTMARKER SPANS





  function initScrollbars(cm) {
if (cm.display.scrollbars) {
cm.display.scrollbars.clear();
if (cm.display.scrollbars.addClass)
rmClass(cm.display.wrapper, cm.display.scrollbars.addClass);
}

function MarkedSpan(marker, from, to) {
this.marker = marker
this.from = from; this.to = to
}







    cm.display.scrollbars = new CodeMirror.scrollbarModel[cm.options.scrollbarStyle](function(node) {
cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
on(node, "mousedown", function() {
if (cm.state.focused) setTimeout(bind(focusInput, cm), 0);
});
node.setAttribute("not-content", "true");
}, function(pos, axis) {
if (axis == "horizontal") setScrollLeft(cm, pos);
else setScrollTop(cm, pos);
}, cm);
if (cm.display.scrollbars.addClass)
addClass(cm.display.wrapper, cm.display.scrollbars.addClass);
}








// Search an array of spans for a span matching the given marker.
function getMarkedSpanFor(spans, marker) {
if (spans) { for (var i = 0; i < spans.length; ++i) {
var span = spans[i]
if (span.marker == marker) { return span }
} }
}
// Remove a span from an array, returning undefined if no spans are
// left (we don't store arrays for lines without spans).
function removeMarkedSpan(spans, span) {
var r
for (var i = 0; i < spans.length; ++i)
{ if (spans[i] != span) { (r || (r = [])).push(spans[i]) } }
return r
}
// Add a span to a line.
function addMarkedSpan(line, span) {
line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]
span.marker.attachLine(line)
}





  function updateScrollbars(cm, measure) {
if (!measure) measure = measureForScrollbars(cm);
var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
updateScrollbarsInner(cm, measure);
for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
updateHeightsInViewport(cm);
updateScrollbarsInner(cm, measureForScrollbars(cm));
startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;




// Used for the algorithm that adjusts markers for a change in the
// document. These functions cut an array of spans at a given
// character position, returning an array of remaining chunks (or
// undefined if nothing remains).
function markedSpansBefore(old, startCh, isInsert) {
var nw
if (old) { for (var i = 0; i < old.length; ++i) {
var span = old[i], marker = span.marker
var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh)
if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to))

    }

    }

  }
















  } }
return nw
}
function markedSpansAfter(old, endCh, isInsert) {
var nw
if (old) { for (var i = 0; i < old.length; ++i) {
var span = old[i], marker = span.marker
var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh)
if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
span.to == null ? null : span.to - endCh))
}
} }
return nw
}





  // Re-synchronize the fake scrollbars with the actual size of the
// content.
function updateScrollbarsInner(cm, measure) {
var d = cm.display;
var sizes = d.scrollbars.update(measure);







// Given a change object, compute the new set of marker spans that
// cover the line in which the change took place. Removes spans
// entirely within the change, reconnects spans belonging to the
// same marker that appear on both sides of the change, and cuts off
// spans partially within the change. Returns an array of span
// arrays with one element for each line in (after) the change.
function stretchSpansOverChange(doc, change) {
if (change.full) { return null }
var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans
var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans
if (!oldFirst && !oldLast) { return null }





    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";



  var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0
// Get the spans that 'stick out' on both sides
var first = markedSpansBefore(oldFirst, startCh, isInsert)
var last = markedSpansAfter(oldLast, endCh, isInsert)





    if (sizes.right && sizes.bottom) {
d.scrollbarFiller.style.display = "block";
d.scrollbarFiller.style.height = sizes.bottom + "px";
d.scrollbarFiller.style.width = sizes.right + "px";
} else d.scrollbarFiller.style.display = "";
if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
d.gutterFiller.style.display = "block";
d.gutterFiller.style.height = sizes.bottom + "px";
d.gutterFiller.style.width = measure.gutterWidth + "px";
} else d.gutterFiller.style.display = "";



  // Next, merge those two ends
var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0)
if (first) {
// Fix up .to properties of first
for (var i = 0; i < first.length; ++i) {
var span = first[i]
if (span.to == null) {
var found = getMarkedSpanFor(last, span.marker)
if (!found) { span.to = startCh }
else if (sameLine) { span.to = found.to == null ? null : found.to + offset }
}
}

  }

  }


// Compute the lines that are visible in a given viewport (defaults
// the the current scroll position). viewport may contain top,
// height, and ensure (see op.scrollToPos) properties.
function visibleLines(display, doc, viewport) {
var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
top = Math.floor(top - paddingTop(display));
var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;

var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
// Ensure is a {from: {line, ch}, to: {line, ch}} object, and
// forces those lines into the viewport (if possible).
if (viewport && viewport.ensure) {
var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
if (ensureFrom < from) {
from = ensureFrom;
to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
} else if (Math.min(ensureTo, doc.lastLine()) >= to) {
from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
to = ensureTo;

  if (last) {
// Fix up .from in last (or move them into first in case of sameLine)
for (var i$1 = 0; i$1 < last.length; ++i$1) {
var span$1 = last[i$1]
if (span$1.to != null) { span$1.to += offset }
if (span$1.from == null) {
var found$1 = getMarkedSpanFor(first, span$1.marker)
if (!found$1) {
span$1.from = offset
if (sameLine) { (first || (first = [])).push(span$1) }
}
} else {
span$1.from += offset
if (sameLine) { (first || (first = [])).push(span$1) }







      }
}

      }
}

    return {from: from, to: Math.max(to, from + 1)};

 
  }

  }

 
  // Make sure we didn't create any zero-length spans
if (first) { first = clearEmptySpans(first) }
if (last && last != first) { last = clearEmptySpans(last) }





  // LINE NUMBERS














  var newMarkers = [first]
if (!sameLine) {
// Fill gap with whole-line-spans
var gap = change.text.length - 2, gapMarkers
if (gap > 0 && first)
{ for (var i$2 = 0; i$2 < first.length; ++i$2)
{ if (first[i$2].to == null)
{ (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)) } } }
for (var i$3 = 0; i$3 < gap; ++i$3)
{ newMarkers.push(gapMarkers) }
newMarkers.push(last)
}
return newMarkers
}





  // Re-align line numbers and gutter marks to compensate for
// horizontal scrolling.
function alignHorizontally(cm) {
var display = cm.display, view = display.view;
if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
var gutterW = display.gutters.offsetWidth, left = comp + "px";
for (var i = 0; i < view.length; i++) if (!view[i].hidden) {
if (cm.options.fixedGutter && view[i].gutter)
view[i].gutter.style.left = left;
var align = view[i].alignable;
if (align) for (var j = 0; j < align.length; j++)
align[j].style.left = left;
}
if (cm.options.fixedGutter)
display.gutters.style.left = (comp + gutterW) + "px";

// Remove spans that are empty and don't have a clearWhenEmpty
// option of false.
function clearEmptySpans(spans) {
for (var i = 0; i < spans.length; ++i) {
var span = spans[i]
if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
{ spans.splice(i--, 1) }










  }

  }

 
  if (!spans.length) { return null }
return spans
}





  // Used to ensure that the line number gutter is still the right
// size for the current document size. Returns true when an update
// is needed.
function maybeUpdateLineNumberWidth(cm) {
if (!cm.options.lineNumbers) return false;
var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
if (last.length != display.lineNumChars) {
var test = display.measure.appendChild(elt("div", [elt("div", last)],
"CodeMirror-linenumber CodeMirror-gutter-elt"));
var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
display.lineGutter.style.width = "";
display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding);
display.lineNumWidth = display.lineNumInnerWidth + padding;
display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
display.lineGutter.style.width = display.lineNumWidth + "px";
updateGutterSpace(cm);
return true;








// Used to 'clip' out readOnly ranges when making a change.
function removeReadOnlyRanges(doc, from, to) {
var markers = null
doc.iter(from.line, to.line + 1, function (line) {
if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
var mark = line.markedSpans[i].marker
if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
{ (markers || (markers = [])).push(mark) }
} }
})
if (!markers) { return null }
var parts = [{from: from, to: to}]
for (var i = 0; i < markers.length; ++i) {
var mk = markers[i], m = mk.find(0)
for (var j = 0; j < parts.length; ++j) {
var p = parts[j]
if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to)
if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
{ newParts.push({from: p.from, to: m.from}) }
if (dto > 0 || !mk.inclusiveRight && !dto)
{ newParts.push({from: m.to, to: p.to}) }
parts.splice.apply(parts, newParts)
j += newParts.length - 3

    }

    }

    return false;

 
  }

  }

 
  return parts
}





  function lineNumberFor(options, i) {
return String(options.lineNumberFormatter(i + options.firstLineNumber));
}



















































































// Connect or disconnect spans from a line.
function detachMarkedSpans(line) {
var spans = line.markedSpans
if (!spans) { return }
for (var i = 0; i < spans.length; ++i)
{ spans[i].marker.detachLine(line) }
line.markedSpans = null
}
function attachMarkedSpans(line, spans) {
if (!spans) { return }
for (var i = 0; i < spans.length; ++i)
{ spans[i].marker.attachLine(line) }
line.markedSpans = spans
}

// Helpers used when computing which overlapping collapsed span
// counts as the larger one.
function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }

// Returns a number indicating which of two overlapping collapsed
// spans is larger (and thus includes the other). Falls back to
// comparing ids when the spans cover exactly the same range.
function compareCollapsedMarkers(a, b) {
var lenDiff = a.lines.length - b.lines.length
if (lenDiff != 0) { return lenDiff }
var aPos = a.find(), bPos = b.find()
var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b)
if (fromCmp) { return -fromCmp }
var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b)
if (toCmp) { return toCmp }
return b.id - a.id
}

// Find out whether a line ends or starts in a collapsed span. If
// so, return the marker for that span.
function collapsedSpanAtSide(line, start) {
var sps = sawCollapsedSpans && line.markedSpans, found
if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
sp = sps[i]
if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
(!found || compareCollapsedMarkers(found, sp.marker) < 0))
{ found = sp.marker }
} }
return found
}
function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }

// Test whether there exists a collapsed span that partially
// overlaps (covers the start or end, but not both) of a new span.
// Such overlap is not allowed.
function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
var line = getLine(doc, lineNo)
var sps = sawCollapsedSpans && line.markedSpans
if (sps) { for (var i = 0; i < sps.length; ++i) {
var sp = sps[i]
if (!sp.marker.collapsed) { continue }
var found = sp.marker.find(0)
var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker)
var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker)
if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
{ return true }
} }
}

// A visual line is a line as drawn on the screen. Folding, for
// example, can cause multiple logical lines to appear on the same
// visual line. This finds the start of the visual line that the
// given line is part of (usually that is the line itself).
function visualLine(line) {
var merged
while (merged = collapsedSpanAtStart(line))
{ line = merged.find(-1, true).line }
return line
}

function visualLineEnd(line) {
var merged
while (merged = collapsedSpanAtEnd(line))
{ line = merged.find(1, true).line }
return line
}





  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
// but using getBoundingClientRect to get a sub-pixel-accurate
// result.
function compensateForHScroll(display) {
return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left;



// Returns an array of logical lines that continue the visual line
// started by the argument, or undefined if there are no such lines.
function visualLineContinued(line) {
var merged, lines
while (merged = collapsedSpanAtEnd(line)) {
line = merged.find(1, true).line
;(lines || (lines = [])).push(line)

  }

  }

 
  return lines
}





  // DISPLAY DRAWING







// Get the line number of the start of the visual line that the
// given line number is part of.
function visualLineNo(doc, lineN) {
var line = getLine(doc, lineN), vis = visualLine(line)
if (line == vis) { return lineN }
return lineNo(vis)
}





  function DisplayUpdate(cm, viewport, force) {
var display = cm.display;









// Get the line number of the start of the next visual line after
// the given line.
function visualLineEndNo(doc, lineN) {
if (lineN > doc.lastLine()) { return lineN }
var line = getLine(doc, lineN), merged
if (!lineIsHidden(doc, line)) { return lineN }
while (merged = collapsedSpanAtEnd(line))
{ line = merged.find(1, true).line }
return lineNo(line) + 1
}





    this.viewport = viewport;
// Store some values that we'll need later (but don't want to force a relayout for)
this.visible = visibleLines(display, cm.doc, viewport);
this.editorIsHidden = !display.wrapper.offsetWidth;
this.wrapperHeight = display.wrapper.clientHeight;
this.wrapperWidth = display.wrapper.clientWidth;
this.oldDisplayWidth = displayWidth(cm);
this.force = force;
this.dims = getDimensions(cm);










// Compute whether a line is hidden. Lines count as hidden when they
// are part of a visual line that starts with another line, or when
// they are entirely covered by collapsed, non-widget span.
function lineIsHidden(doc, line) {
var sps = sawCollapsedSpans && line.markedSpans
if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
sp = sps[i]
if (!sp.marker.collapsed) { continue }
if (sp.from == null) { return true }
if (sp.marker.widgetNode) { continue }
if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
{ return true }
} }
}
function lineIsHiddenInner(doc, line, span) {
if (span.to == null) {
var end = span.marker.find(1, true)
return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))

  }

  }

 
  if (span.marker.inclusiveRight && span.to == line.text.length)
{ return true }
for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
sp = line.markedSpans[i]
if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
(sp.to == null || sp.to != span.from) &&
(sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
lineIsHiddenInner(doc, line, sp)) { return true }
}
}





  function maybeClipScrollbars(cm) {
var display = cm.display;
if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
display.heightForcer.style.height = scrollGap(cm) + "px";
display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
display.scrollbarsClipped = true;








// Find the height above the given line.
function heightAtLine(lineObj) {
lineObj = visualLine(lineObj)

var h = 0, chunk = lineObj.parent
for (var i = 0; i < chunk.lines.length; ++i) {
var line = chunk.lines[i]
if (line == lineObj) { break }
else { h += line.height }
}
for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
var cur = p.children[i$1]
if (cur == chunk) { break }
else { h += cur.height }

    }
}

    }
}

 
  return h
}





  // Does the actual updating of the line display. Bails out
// (returning false) when there is nothing to be done and forced is
// false.
function updateDisplayIfNeeded(cm, update) {
var display = cm.display, doc = cm.doc;
















// Compute the character length of a line, taking into account
// collapsed ranges (see markText) that might hide parts, and join
// other lines onto it.
function lineLength(line) {
if (line.height == 0) { return 0 }
var len = line.text.length, merged, cur = line
while (merged = collapsedSpanAtStart(cur)) {
var found = merged.find(0, true)
cur = found.from.line
len += found.from.ch - found.to.ch
}
cur = line
while (merged = collapsedSpanAtEnd(cur)) {
var found$1 = merged.find(0, true)
len -= cur.text.length - found$1.from.ch
cur = found$1.to.line
len += cur.text.length - found$1.to.ch
}
return len
}





    if (update.editorIsHidden) {
resetView(cm);
return false;









// Find the longest line in the document.
function findMaxLine(cm) {
var d = cm.display, doc = cm.doc
d.maxLine = getLine(doc, doc.first)
d.maxLineLength = lineLength(d.maxLine)
d.maxLineChanged = true
doc.iter(function (line) {
var len = lineLength(line)
if (len > d.maxLineLength) {
d.maxLineLength = len
d.maxLine = line

    }

    }

 
  })
}





    // Bail out if the visible area is already rendered and nothing changed.
if (!update.force &&
update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
(display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
display.renderedView == display.view && countDirtyView(cm) == 0)
return false;

// BIDI HELPERS










    if (maybeUpdateLineNumberWidth(cm)) {
resetView(cm);
update.dims = getDimensions(cm);






function iterateBidiSections(order, from, to, f) {
if (!order) { return f(from, to, "ltr", 0) }
var found = false
for (var i = 0; i < order.length; ++i) {
var part = order[i]
if (part.from < to && part.to > from || from == to && part.to == from) {
f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i)
found = true

    }

    }

 
  }
if (!found) { f(from, to, "ltr") }
}





    // Compute a suitable new viewport (from & to)
var end = doc.first + doc.size;
var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max(doc.first, display.viewFrom);
if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, display.viewTo);
if (sawCollapsedSpans) {
from = visualLineNo(cm.doc, from);
to = visualLineEndNo(cm.doc, to);


var bidiOther = null
function getBidiPartAt(order, ch, sticky) {
var found
bidiOther = null
for (var i = 0; i < order.length; ++i) {
var cur = order[i]
if (cur.from < ch && cur.to > ch) { return i }
if (cur.to == ch) {
if (cur.from != cur.to && sticky == "before") { found = i }
else { bidiOther = i }

    }

    }

 
    if (cur.from == ch) {
if (cur.from != cur.to && sticky != "before") { found = i }
else { bidiOther = i }
}
}
return found != null ? found : bidiOther
}





    var different = from != display.viewFrom || to != display.viewTo ||
display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
adjustView(cm, from, to);

// Bidirectional ordering algorithm
// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
// that this (partially) implements.





    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
// Position the mover div to align with the current scroll position
cm.display.mover.style.top = display.viewOffset + "px";













// One-char codes used for character types:
// L (L): Left-to-Right
// R (R): Right-to-Left
// r (AL): Right-to-Left Arabic
// 1 (EN): European Number
// + (ES): European Number Separator
// % (ET): European Number Terminator
// n (AN): Arabic Number
// , (CS): Common Number Separator
// m (NSM): Non-Spacing Mark
// b (BN): Boundary Neutral
// s (B): Paragraph Separator
// t (S): Segment Separator
// w (WS): Whitespace
// N (ON): Other Neutrals





    var toUpdate = countDirtyView(cm);
if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
(display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
return false;














// Returns null if characters are ordered as they appear
// (left-to-right), or an array of sections ({from, to, level}
// objects) in the order in which they occur visually.
var bidiOrdering = (function() {
// Character types for codepoints 0 to 0xff
var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN"
// Character types for codepoints 0x600 to 0x6f9
var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111"
function charType(code) {
if (code <= 0xf7) { return lowTypes.charAt(code) }
else if (0x590 <= code && code <= 0x5f4) { return "R" }
else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
else if (0x6ee <= code && code <= 0x8ac) { return "r" }
else if (0x2000 <= code && code <= 0x200b) { return "w" }
else if (code == 0x200c) { return "b" }
else { return "L" }
}





    // For big changes, we hide the enclosing element during the
// update, since that speeds up the operations on most browsers.
var focused = activeElt();
if (toUpdate > 4) display.lineDiv.style.display = "none";
patchDisplay(cm, display.updateLineNumbers, update.dims);
if (toUpdate > 4) display.lineDiv.style.display = "";
display.renderedView = display.view;
// There might have been a widget with a focused element that got
// hidden or updated, if so re-focus it.
if (focused && activeElt() != focused && focused.offsetHeight) focused.focus();

  var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/
var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/













    // Prevent selection and cursors from interfering with the scroll
// width and height.
removeChildren(display.cursorDiv);
removeChildren(display.selectionDiv);
display.gutters.style.height = 0;

  function BidiSpan(level, from, to) {
this.level = level
this.from = from; this.to = to
}






    if (different) {
display.lastWrapHeight = update.wrapperHeight;
display.lastWrapWidth = update.wrapperWidth;
startWorker(cm, 400);













  return function(str, direction) {
var outerType = direction == "ltr" ? "L" : "R"

if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
var len = str.length, types = []
for (var i = 0; i < len; ++i)
{ types.push(charType(str.charCodeAt(i))) }

// W1. Examine each non-spacing mark (NSM) in the level run, and
// change the type of the NSM to the type of the previous
// character. If the NSM is at the start of the level run, it will
// get the type of sor.
for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
var type = types[i$1]
if (type == "m") { types[i$1] = prev }
else { prev = type }

    }


    }


    display.updateLineNumbers = null;










    // W2. Search backwards from each instance of a European number
// until the first strong type (R, L, AL, or sor) is found. If an
// AL is found, change the type of the European number to Arabic
// number.
// W3. Change all ALs to R.
for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
var type$1 = types[i$2]
if (type$1 == "1" && cur == "r") { types[i$2] = "n" }
else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R" } }
}





    return true;
}









    // W4. A single European separator between two European numbers
// changes to a European number. A single common separator between
// two numbers of the same type changes to that type.
for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
var type$2 = types[i$3]
if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1" }
else if (type$2 == "," && prev$1 == types[i$3+1] &&
(prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1 }
prev$1 = type$2
}





  function postUpdateDisplay(cm, update) {
var force = update.force, viewport = update.viewport;
for (var first = true;; first = false) {
if (first && cm.options.lineWrapping && update.oldDisplayWidth != displayWidth(cm)) {
force = true;
} else {
force = false;
// Clip forced viewport to actual scrollable area.
if (viewport && viewport.top != null)
viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)};
// Updated line heights might result in the drawn area not
// actually covering the viewport. Keep looping until it does.
update.visible = visibleLines(cm.display, cm.doc, viewport);
if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
break;

    // W5. A sequence of European terminators adjacent to European
// numbers changes to all European numbers.
// W6. Otherwise, separators and terminators change to Other
// Neutral.
for (var i$4 = 0; i$4 < len; ++i$4) {
var type$3 = types[i$4]
if (type$3 == ",") { types[i$4] = "N" }
else if (type$3 == "%") {
var end = (void 0)
for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N"
for (var j = i$4; j < end; ++j) { types[j] = replace }
i$4 = end - 1



      }

      }

      if (!updateDisplayIfNeeded(cm, update)) break;
updateHeightsInViewport(cm);
var barMeasure = measureForScrollbars(cm);
updateSelection(cm);
setDocumentHeight(cm, barMeasure);
updateScrollbars(cm, barMeasure);

 
    }


    }


    signalLater(cm, "update", cm);
if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
signalLater(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;




    // W7. Search backwards from each instance of a European number
// until the first strong type (R, L, or sor) is found. If an L is
// found, then change the type of the European number to L.
for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
var type$4 = types[i$5]
if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L" }
else if (isStrong.test(type$4)) { cur$1 = type$4 }

    }

    }

  }

 




  function updateDisplaySimple(cm, viewport) {
var update = new DisplayUpdate(cm, viewport);
if (updateDisplayIfNeeded(cm, update)) {
updateHeightsInViewport(cm);
postUpdateDisplay(cm, update);
var barMeasure = measureForScrollbars(cm);
updateSelection(cm);
setDocumentHeight(cm, barMeasure);
updateScrollbars(cm, barMeasure);








    // N1. A sequence of neutrals takes the direction of the
// surrounding strong text if the text on both sides has the same
// direction. European and Arabic numbers act as if they were R in
// terms of their influence on neutrals. Start-of-level-run (sor)
// and end-of-level-run (eor) are used at level run boundaries.
// N2. Any remaining neutrals take the embedding direction.
for (var i$6 = 0; i$6 < len; ++i$6) {
if (isNeutral.test(types[i$6])) {
var end$1 = (void 0)
for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
var before = (i$6 ? types[i$6-1] : outerType) == "L"
var after = (end$1 < len ? types[end$1] : outerType) == "L"
var replace$1 = before == after ? (before ? "L" : "R") : outerType
for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1 }
i$6 = end$1 - 1
}

    }

    }

  }

function setDocumentHeight(cm, measure) {
cm.display.sizer.style.minHeight = measure.docHeight + "px";
var total = measure.docHeight + cm.display.barHeight;
cm.display.heightForcer.style.top = total + "px";
cm.display.gutters.style.height = Math.max(total + scrollGap(cm), measure.clientHeight) + "px";
}

 




  // Read the actual heights of the rendered lines, and update their
// stored heights to match.
function updateHeightsInViewport(cm) {
var display = cm.display;
var prevBottom = display.lineDiv.offsetTop;
for (var i = 0; i < display.view.length; i++) {
var cur = display.view[i], height;
if (cur.hidden) continue;
if (ie && ie_version < 8) {
var bot = cur.node.offsetTop + cur.node.offsetHeight;
height = bot - prevBottom;
prevBottom = bot;

    // Here we depart from the documented algorithm, in order to avoid
// building up an actual levels array. Since there are only three
// levels (0, 1, 2) in an implementation that doesn't take
// explicit embedding into account, we can build up the order on
// the fly, without following the level-based algorithm.
var order = [], m
for (var i$7 = 0; i$7 < len;) {
if (countsAsLeft.test(types[i$7])) {
var start = i$7
for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
order.push(new BidiSpan(0, start, i$7))


      } else {

      } else {

        var box = cur.node.getBoundingClientRect();
height = box.bottom - box.top;
}
var diff = cur.line.height - height;
if (height < 2) height = textHeight(display);
if (diff > .001 || diff < -.001) {
updateLineHeight(cur.line, height);
updateWidgetHeight(cur.line);
if (cur.rest) for (var j = 0; j < cur.rest.length; j++)
updateWidgetHeight(cur.rest[j]);



        var pos = i$7, at = order.length
for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
for (var j$2 = pos; j$2 < i$7;) {
if (countsAsNum.test(types[j$2])) {
if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)) }
var nstart = j$2
for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
order.splice(at, 0, new BidiSpan(2, nstart, j$2))
pos = j$2
} else { ++j$2 }
}
if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)) }

      }
}

      }
}

  }








    if (order[0].level == 1 && (m = str.match(/^\s+/))) {
order[0].from = m[0].length
order.unshift(new BidiSpan(0, 0, m[0].length))
}
if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
lst(order).to -= m[0].length
order.push(new BidiSpan(0, len - m[0].length, len))
}





  // Read and store the height of line widgets associated with the
// given line.
function updateWidgetHeight(line) {
if (line.widgets) for (var i = 0; i < line.widgets.length; ++i)
line.widgets[i].height = line.widgets[i].node.offsetHeight;

    return direction == "rtl" ? order.reverse() : order





  }

  }

 
})()





  // Do a bulk-read of the DOM positions and sizes needed to draw the
// view, so that we don't interleave reading and writing to the DOM.
function getDimensions(cm) {
var d = cm.display, left = {}, width = {};
var gutterLeft = d.gutters.clientLeft;
for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft;
width[cm.options.gutters[i]] = n.clientWidth;
}
return {fixedPos: compensateForHScroll(d),
gutterTotalWidth: d.gutters.offsetWidth,
gutterLeft: left,
gutterWidth: width,
wrapperWidth: d.wrapper.clientWidth};
}

// Get the bidi ordering for the given line (and cache it). Returns
// false for lines that are fully left-to-right, and an array of
// BidiSpan objects otherwise.
function getOrder(line, direction) {
var order = line.order
if (order == null) { order = line.order = bidiOrdering(line.text, direction) }
return order
}












  // Sync the actual display DOM structure with display.view, removing
// nodes for lines that are no longer in view, and creating the ones
// that are not there yet, and updating the ones that are out of
// date.
function patchDisplay(cm, updateNumbersFrom, dims) {
var display = cm.display, lineNumbers = cm.options.lineNumbers;
var container = display.lineDiv, cur = container.firstChild;

// EVENT HANDLING











    function rm(node) {
var next = node.nextSibling;
// Works around a throw-scroll bug in OS X Webkit
if (webkit && mac && cm.display.currentWheelTarget == node)
node.style.display = "none";
else
node.parentNode.removeChild(node);
return next;
}

// Lightweight event framework. on/off also work on DOM nodes,
// registering native DOM handlers.












    var view = display.view, lineN = display.viewFrom;
// Loop over the elements in the view, syncing cur (the DOM nodes
// in display.lineDiv) with the view as we go.
for (var i = 0; i < view.length; i++) {
var lineView = view[i];
if (lineView.hidden) {
} else if (!lineView.node) { // Not drawn yet
var node = buildLineElement(cm, lineView, lineN, dims);
container.insertBefore(node, cur);
} else { // Already drawn
while (cur != lineView.node) cur = rm(cur);
var updateNumber = lineNumbers && updateNumbersFrom != null &&
updateNumbersFrom <= lineN && lineView.lineNumber;
if (lineView.changes) {
if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false;
updateLineForChanges(cm, lineView, lineN, dims);
}
if (updateNumber) {
removeChildren(lineView.lineNumber);
lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
}
cur = lineView.node.nextSibling;
}
lineN += lineView.size;
}
while (cur) cur = rm(cur);
}

var noHandlers = []































  // When an aspect of a line changes, a string is added to
// lineView.changes. This updates the relevant part of the line's
// DOM structure.
function updateLineForChanges(cm, lineView, lineN, dims) {
for (var j = 0; j < lineView.changes.length; j++) {
var type = lineView.changes[j];
if (type == "text") updateLineText(cm, lineView);
else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims);
else if (type == "class") updateLineClasses(lineView);
else if (type == "widget") updateLineWidgets(lineView, dims);
}
lineView.changes = null;

var on = function(emitter, type, f) {
if (emitter.addEventListener) {
emitter.addEventListener(type, f, false)
} else if (emitter.attachEvent) {
emitter.attachEvent("on" + type, f)
} else {
var map = emitter._handlers || (emitter._handlers = {})
map[type] = (map[type] || noHandlers).concat(f)





  }

  }

 
}





  // Lines with gutter elements, widgets or a background class need to
// be wrapped, and have the extra elements added to the wrapper div
function ensureLineWrapped(lineView) {
if (lineView.node == lineView.text) {
lineView.node = elt("div", null, null, "position: relative");
if (lineView.text.parentNode)
lineView.text.parentNode.replaceChild(lineView.node, lineView.text);
lineView.node.appendChild(lineView.text);
if (ie && ie_version < 8) lineView.node.style.zIndex = 2;







function getHandlers(emitter, type) {
return emitter._handlers && emitter._handlers[type] || noHandlers
}

function off(emitter, type, f) {
if (emitter.removeEventListener) {
emitter.removeEventListener(type, f, false)
} else if (emitter.detachEvent) {
emitter.detachEvent("on" + type, f)
} else {
var map = emitter._handlers, arr = map && map[type]
if (arr) {
var index = indexOf(arr, f)
if (index > -1)
{ map[type] = arr.slice(0, index).concat(arr.slice(index + 1)) }

    }

    }

    return lineView.node;

 
  }

  }

 
}





  function updateLineBackground(lineView) {
var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
if (cls) cls += " CodeMirror-linebackground";
if (lineView.background) {
if (cls) lineView.background.className = cls;
else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
} else if (cls) {
var wrap = ensureLineWrapped(lineView);
lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
}


















































function signal(emitter, type /*, values...*/) {
var handlers = getHandlers(emitter, type)
if (!handlers.length) { return }
var args = Array.prototype.slice.call(arguments, 2)
for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args) }
}

// The DOM events that CodeMirror handles can be overridden by
// registering a (non-DOM) handler on the editor for the event name,
// and preventDefault-ing the event in that handler.
function signalDOMEvent(cm, e, override) {
if (typeof e == "string")
{ e = {type: e, preventDefault: function() { this.defaultPrevented = true }} }
signal(cm, override || e.type, cm, e)
return e_defaultPrevented(e) || e.codemirrorIgnore
}

function signalCursorActivity(cm) {
var arr = cm._handlers && cm._handlers.cursorActivity
if (!arr) { return }
var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = [])
for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
{ set.push(arr[i]) } }
}

function hasHandler(emitter, type) {
return getHandlers(emitter, type).length > 0
}

// Add on and off methods to a constructor's prototype, to make
// registering events on such objects more convenient.
function eventMixin(ctor) {
ctor.prototype.on = function(type, f) {on(this, type, f)}
ctor.prototype.off = function(type, f) {off(this, type, f)}
}

// Due to the fact that we still support jurassic IE versions, some
// compatibility wrappers are needed.

function e_preventDefault(e) {
if (e.preventDefault) { e.preventDefault() }
else { e.returnValue = false }
}
function e_stopPropagation(e) {
if (e.stopPropagation) { e.stopPropagation() }
else { e.cancelBubble = true }
}
function e_defaultPrevented(e) {
return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
}
function e_stop(e) {e_preventDefault(e); e_stopPropagation(e)}

function e_target(e) {return e.target || e.srcElement}
function e_button(e) {
var b = e.which
if (b == null) {
if (e.button & 1) { b = 1 }
else if (e.button & 2) { b = 3 }
else if (e.button & 4) { b = 2 }

  }

  }

 
  if (mac && e.ctrlKey && b == 1) { b = 3 }
return b
}





  // Wrapper around buildLineContent which will reuse the structure
// in display.externalMeasured when possible.
function getLineContent(cm, lineView) {
var ext = cm.display.externalMeasured;
if (ext && ext.line == lineView.line) {
cm.display.externalMeasured = null;
lineView.measure = ext.measure;
return ext.built;
}
return buildLineContent(cm, lineView);







// Detect drag-and-drop
var dragAndDrop = function() {
// There is *some* kind of drag-and-drop support in IE6-8, but I
// couldn't get it to work yet.
if (ie && ie_version < 9) { return false }
var div = elt('div')
return "draggable" in div || "dragDrop" in div
}()

var zwspSupported
function zeroWidthElement(measure) {
if (zwspSupported == null) {
var test = elt("span", "\u200b")
removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]))
if (measure.firstChild.offsetHeight != 0)
{ zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8) }

  }

  }

 
  var node = zwspSupported ? elt("span", "\u200b") :
elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px")
node.setAttribute("cm-text", "")
return node
}





  // Redraw the line's text. Interacts with the background and text
// classes because the mode may output tokens that influence these
// classes.
function updateLineText(cm, lineView) {
var cls = lineView.text.className;
var built = getLineContent(cm, lineView);
if (lineView.text == lineView.node) lineView.node = built.pre;
lineView.text.parentNode.replaceChild(built.pre, lineView.text);
lineView.text = built.pre;
if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
lineView.bgClass = built.bgClass;
lineView.textClass = built.textClass;
updateLineClasses(lineView);
} else if (cls) {
lineView.text.className = cls;













// Feature-detect IE's crummy client rect reporting for bidi text
var badBidiRects
function hasBadBidiRects(measure) {
if (badBidiRects != null) { return badBidiRects }
var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
var r0 = range(txt, 0, 1).getBoundingClientRect()
var r1 = range(txt, 1, 2).getBoundingClientRect()
removeChildren(measure)
if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
return badBidiRects = (r1.right - r0.right < 3)
}

// See if "".split is the broken IE version, if so, provide an
// alternative way to split lines.
var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
var pos = 0, result = [], l = string.length
while (pos <= l) {
var nl = string.indexOf("\n", pos)
if (nl == -1) { nl = string.length }
var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl)
var rt = line.indexOf("\r")
if (rt != -1) {
result.push(line.slice(0, rt))
pos += rt + 1
} else {
result.push(line)
pos = nl + 1

    }
}

    }
}

 
  return result
} : function (string) { return string.split(/\r\n?|\n/); }





  function updateLineClasses(lineView) {
updateLineBackground(lineView);
if (lineView.line.wrapClass)
ensureLineWrapped(lineView).className = lineView.line.wrapClass;
else if (lineView.node != lineView.text)
lineView.node.className = "";
var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
lineView.text.className = textClass || "";
}


var hasSelection = window.getSelection ? function (te) {
try { return te.selectionStart != te.selectionEnd }
catch(e) { return false }
} : function (te) {
var range
try {range = te.ownerDocument.selection.createRange()}
catch(e) {}
if (!range || range.parentElement() != te) { return false }
return range.compareEndPoints("StartToEnd", range) != 0
}





  function updateLineGutter(cm, lineView, lineN, dims) {
if (lineView.gutter) {
lineView.node.removeChild(lineView.gutter);
lineView.gutter = null;
}
var markers = lineView.line.gutterMarkers;
if (cm.options.lineNumbers || markers) {
var wrap = ensureLineWrapped(lineView);
var gutterWrap = lineView.gutter =
wrap.insertBefore(elt("div", null, "CodeMirror-gutter-wrapper", "left: " +
(cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) +
"px; width: " + dims.gutterTotalWidth + "px"),
lineView.text);
if (lineView.line.gutterClass)
gutterWrap.className += " " + lineView.line.gutterClass;
if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
lineView.lineNumber = gutterWrap.appendChild(
elt("div", lineNumberFor(cm.options, lineN),
"CodeMirror-linenumber CodeMirror-gutter-elt",
"left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
+ cm.display.lineNumInnerWidth + "px"));
if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) {
var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
if (found)
gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
}
}


















var hasCopyEvent = (function () {
var e = elt("div")
if ("oncopy" in e) { return true }
e.setAttribute("oncopy", "return;")
return typeof e.oncopy == "function"
})()

var badZoomedRects = null
function hasBadZoomedRects(measure) {
if (badZoomedRects != null) { return badZoomedRects }
var node = removeChildrenAndAdd(measure, elt("span", "x"))
var normal = node.getBoundingClientRect()
var fromRange = range(node, 0, 1).getBoundingClientRect()
return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
}

var modes = {};
var mimeModes = {};
// Extra arguments are stored as the mode's dependencies, which is
// used by (legacy) mechanisms like loadmode.js to automatically
// load a mode. (Preferred mechanism is the require/define calls.)
function defineMode(name, mode) {
if (arguments.length > 2)
{ mode.dependencies = Array.prototype.slice.call(arguments, 2) }
modes[name] = mode
}

function defineMIME(mime, spec) {
mimeModes[mime] = spec
}

// Given a MIME type, a {name, ...options} config object, or a name
// string, return a mode config object.
function resolveMode(spec) {
if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
spec = mimeModes[spec]
} else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
var found = mimeModes[spec.name]
if (typeof found == "string") { found = {name: found} }
spec = createObj(found, spec)
spec.name = found.name
} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
return resolveMode("application/xml")
} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
return resolveMode("application/json")

  }

  }

 
  if (typeof spec == "string") { return {name: spec} }
else { return spec || {name: "null"} }
}





  function updateLineWidgets(lineView, dims) {
if (lineView.alignable) lineView.alignable = null;
for (var node = lineView.node.firstChild, next; node; node = next) {
var next = node.nextSibling;
if (node.className == "CodeMirror-linewidget")
lineView.node.removeChild(node);








// Given a mode spec (anything that resolveMode accepts), find and
// initialize an actual mode object.
function getMode(options, spec) {
spec = resolveMode(spec)
var mfactory = modes[spec.name]
if (!mfactory) { return getMode(options, "text/plain") }
var modeObj = mfactory(options, spec)
if (modeExtensions.hasOwnProperty(spec.name)) {
var exts = modeExtensions[spec.name]
for (var prop in exts) {
if (!exts.hasOwnProperty(prop)) { continue }
if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop] }
modeObj[prop] = exts[prop]

    }

    }

    insertLineWidgets(lineView, dims);

 
  }

  }

 
  modeObj.name = spec.name
if (spec.helperType) { modeObj.helperType = spec.helperType }
if (spec.modeProps) { for (var prop$1 in spec.modeProps)
{ modeObj[prop$1] = spec.modeProps[prop$1] } }





  // Build a line's DOM representation from scratch
function buildLineElement(cm, lineView, lineN, dims) {
var built = getLineContent(cm, lineView);
lineView.text = lineView.node = built.pre;
if (built.bgClass) lineView.bgClass = built.bgClass;
if (built.textClass) lineView.textClass = built.textClass;

  return modeObj
}









    updateLineClasses(lineView);
updateLineGutter(cm, lineView, lineN, dims);
insertLineWidgets(lineView, dims);
return lineView.node;
}



// This can be used to attach properties to mode objects from
// outside the actual mode definition.
var modeExtensions = {}
function extendMode(mode, properties) {
var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {})
copyObj(properties, exts)
}





  // A lineView may contain multiple logical lines (when merged by
// collapsed spans). The widgets for all of them need to be drawn.
function insertLineWidgets(lineView, dims) {
insertLineWidgetsFor(lineView.line, lineView, dims, true);
if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
insertLineWidgetsFor(lineView.rest[i], lineView, dims, false);



function copyState(mode, state) {
if (state === true) { return state }
if (mode.copyState) { return mode.copyState(state) }
var nstate = {}
for (var n in state) {
var val = state[n]
if (val instanceof Array) { val = val.concat([]) }
nstate[n] = val

  }

  }

 
  return nstate
}





  function insertLineWidgetsFor(line, lineView, dims, allowAbove) {
if (!line.widgets) return;
var wrap = ensureLineWrapped(lineView);
for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
if (!widget.handleMouseEvents) node.setAttribute("cm-ignore-events", "true");
positionLineWidget(widget, node, lineView, dims);
if (allowAbove && widget.above)
wrap.insertBefore(node, lineView.gutter || lineView.text);
else
wrap.appendChild(node);
signalLater(widget, "redraw");
}

// Given a mode and a state (for that mode), find the inner mode and
// state at the position that the state refers to.
function innerMode(mode, state) {
var info
while (mode.innerMode) {
info = mode.innerMode(state)
if (!info || info.mode == mode) { break }
state = info.state
mode = info.mode





  }

  }

 
  return info || {mode: mode, state: state}
}





  function positionLineWidget(widget, node, lineView, dims) {
if (widget.noHScroll) {
(lineView.alignable || (lineView.alignable = [])).push(node);
var width = dims.wrapperWidth;
node.style.left = dims.fixedPos + "px";
if (!widget.coverGutter) {
width -= dims.gutterTotalWidth;
node.style.paddingLeft = dims.gutterTotalWidth + "px";
}
node.style.width = width + "px";
}
if (widget.coverGutter) {
node.style.zIndex = 5;
node.style.position = "relative";
if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";






















































function startState(mode, a1, a2) {
return mode.startState ? mode.startState(a1, a2) : true
}

// STRING STREAM

// Fed to the mode parsers, provides helper functions to make
// parsers more succinct.

var StringStream = function(string, tabSize, lineOracle) {
this.pos = this.start = 0
this.string = string
this.tabSize = tabSize || 8
this.lastColumnPos = this.lastColumnValue = 0
this.lineStart = 0
this.lineOracle = lineOracle
};

StringStream.prototype.eol = function () {return this.pos >= this.string.length};
StringStream.prototype.sol = function () {return this.pos == this.lineStart};
StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
StringStream.prototype.next = function () {
if (this.pos < this.string.length)
{ return this.string.charAt(this.pos++) }
};
StringStream.prototype.eat = function (match) {
var ch = this.string.charAt(this.pos)
var ok
if (typeof match == "string") { ok = ch == match }
else { ok = ch && (match.test ? match.test(ch) : match(ch)) }
if (ok) {++this.pos; return ch}
};
StringStream.prototype.eatWhile = function (match) {
var start = this.pos
while (this.eat(match)){}
return this.pos > start
};
StringStream.prototype.eatSpace = function () {
var this$1 = this;

var start = this.pos
while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos }
return this.pos > start
};
StringStream.prototype.skipToEnd = function () {this.pos = this.string.length};
StringStream.prototype.skipTo = function (ch) {
var found = this.string.indexOf(ch, this.pos)
if (found > -1) {this.pos = found; return true}
};
StringStream.prototype.backUp = function (n) {this.pos -= n};
StringStream.prototype.column = function () {
if (this.lastColumnPos < this.start) {
this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue)
this.lastColumnPos = this.start
}
return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
};
StringStream.prototype.indentation = function () {
return countColumn(this.string, null, this.tabSize) -
(this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
};
StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
if (typeof pattern == "string") {
var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; }
var substr = this.string.substr(this.pos, pattern.length)
if (cased(substr) == cased(pattern)) {
if (consume !== false) { this.pos += pattern.length }
return true

    }

    }

 
  } else {
var match = this.string.slice(this.pos).match(pattern)
if (match && match.index > 0) { return null }
if (match && consume !== false) { this.pos += match[0].length }
return match

  }

  }

 
};
StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
StringStream.prototype.hideFirstChars = function (n, inner) {
this.lineStart += n
try { return inner() }
finally { this.lineStart -= n }
};
StringStream.prototype.lookAhead = function (n) {
var oracle = this.lineOracle
return oracle && oracle.lookAhead(n)
};





  // POSITION OBJECT




var SavedContext = function(state, lookAhead) {
this.state = state
this.lookAhead = lookAhead
};





  // A Pos instance represents a position within the text.
var Pos = CodeMirror.Pos = function(line, ch) {
if (!(this instanceof Pos)) return new Pos(line, ch);
this.line = line; this.ch = ch;
};


var Context = function(doc, state, line, lookAhead) {
this.state = state
this.doc = doc
this.line = line
this.maxLookAhead = lookAhead || 0
};





  // Compare two positions, return 0 if they are the same, a negative
// number when a is less, and a positive number otherwise.
var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch - b.ch; };



Context.prototype.lookAhead = function (n) {
var line = this.doc.getLine(this.line + n)
if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n }
return line
};





  function copyPos(x) {return Pos(x.line, x.ch);}
function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; }
function minPos(a, b) { return cmp(a, b) < 0 ? a : b; }


Context.prototype.nextLine = function () {
this.line++
if (this.maxLookAhead > 0) { this.maxLookAhead-- }
};





  // SELECTION / CURSOR






Context.fromSaved = function (doc, saved, line) {
if (saved instanceof SavedContext)
{ return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
else
{ return new Context(doc, copyState(doc.mode, saved), line) }
};





  // Selection objects are immutable. A new one is created every time
// the selection changes. A selection is one or more non-overlapping
// (and non-touching) ranges, sorted, and an integer that indicates
// which one is the primary selection (the one that's scrolled into
// view, that getCursor returns, etc).
function Selection(ranges, primIndex) {
this.ranges = ranges;
this.primIndex = primIndex;
}










Context.prototype.save = function (copy) {
var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state
return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
};


// Compute a style array (an array starting with a mode generation
// -- for invalidation -- followed by pairs of end positions and
// style strings), which is used to highlight the tokens on the
// line.
function highlightLine(cm, line, context, forceToEnd) {
// A styles array always starts with a number identifying the
// mode/overlays that it is based on (for easy invalidation).
var st = [cm.state.modeGen], lineClasses = {}
// Compute the base array of styles
runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
lineClasses, forceToEnd)
var state = context.state





  Selection.prototype = {
primary: function() { return this.ranges[this.primIndex]; },
equals: function(other) {
if (other == this) return true;
if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) return false;
for (var i = 0; i < this.ranges.length; i++) {
var here = this.ranges[i], there = other.ranges[i];
if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) return false;






  // Run overlays, adjust style array.
var loop = function ( o ) {
var overlay = cm.state.overlays[o], i = 1, at = 0
context.state = true
runMode(cm, line.text, overlay.mode, context, function (end, style) {
var start = i
// Ensure there's a token end at the current position, and that i points at it
while (at < end) {
var i_end = st[i]
if (i_end > end)
{ st.splice(i, 1, end, st[i+1], i_end) }
i += 2
at = Math.min(end, i_end)

      }

      }

      return true;
},
deepCopy: function() {
for (var out = [], i = 0; i < this.ranges.length; i++)
out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head));
return new Selection(out, this.primIndex);
},
somethingSelected: function() {
for (var i = 0; i < this.ranges.length; i++)
if (!this.ranges[i].empty()) return true;
return false;
},
contains: function(pos, end) {
if (!end) end = pos;
for (var i = 0; i < this.ranges.length; i++) {
var range = this.ranges[i];
if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
return i;

      if (!style) { return }
if (overlay.opaque) {
st.splice(start, i - start, end, "overlay " + style)
i = start + 2
} else {
for (; start < i; start += 2) {
var cur = st[start+1]
st[start+1] = (cur ? cur + " " : "") + "overlay " + style
}










      }

      }

      return -1;
}

    }, lineClasses)


  };


  };


  function Range(anchor, head) {
this.anchor = anchor; this.head = head;
}

  for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
context.state = state






  Range.prototype = {
from: function() { return minPos(this.anchor, this.head); },
to: function() { return maxPos(this.anchor, this.head); },
empty: function() {
return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch;
}
};

  return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
}










  // Take an unsorted, potentially overlapping set of ranges, and
// build a selection out of it. 'Consumes' ranges array (modifying
// it).
function normalizeSelection(ranges, primIndex) {
var prim = ranges[primIndex];
ranges.sort(function(a, b) { return cmp(a.from(), b.from()); });
primIndex = indexOf(ranges, prim);
for (var i = 1; i < ranges.length; i++) {
var cur = ranges[i], prev = ranges[i - 1];
if (cmp(prev.to(), cur.from()) >= 0) {
var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
if (i <= primIndex) --primIndex;
ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
}
}
return new Selection(ranges, primIndex);

function getLineStyles(cm, line, updateFrontier) {
if (!line.styles || line.styles[0] != cm.state.modeGen) {
var context = getContextBefore(cm, lineNo(line))
var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state)
var result = highlightLine(cm, line, context)
if (resetState) { context.state = resetState }
line.stateAfter = context.save(!resetState)
line.styles = result.styles
if (result.classes) { line.styleClasses = result.classes }
else if (line.styleClasses) { line.styleClasses = null }
if (updateFrontier === cm.doc.highlightFrontier)
{ cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier) }






  }

  }

 
  return line.styles
}





  function simpleSelection(anchor, head) {
return new Selection([new Range(anchor, head || anchor)], 0);
}




function getContextBefore(cm, n, precise) {
var doc = cm.doc, display = cm.display
if (!doc.mode.startState) { return new Context(doc, true, n) }
var start = findStartLine(cm, n, precise)
var saved = start > doc.first && getLine(doc, start - 1).stateAfter
var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start)





  // Most of the external API clips given positions to make sure they
// actually exist within the document.
function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
function clipPos(doc, pos) {
if (pos.line < doc.first) return Pos(doc.first, 0);
var last = doc.first + doc.size - 1;
if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
return clipToLen(pos, getLine(doc, pos.line).text.length);
}
function clipToLen(pos, linelen) {
var ch = pos.ch;
if (ch == null || ch > linelen) return Pos(pos.line, linelen);
else if (ch < 0) return Pos(pos.line, 0);
else return pos;
}
function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
function clipPosArray(doc, array) {
for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i]);
return out;



  doc.iter(start, n, function (line) {
processLine(cm, line.text, context)
var pos = context.line
line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null
context.nextLine()
})
if (precise) { doc.modeFrontier = context.line }
return context
}

// Lightweight form of highlight -- proceed over this line and
// update state, but don't save a style array. Used for lines that
// aren't currently visible.
function processLine(cm, text, context, startAt) {
var mode = cm.doc.mode
var stream = new StringStream(text, cm.options.tabSize, context)
stream.start = stream.pos = startAt || 0
if (text == "") { callBlankLine(mode, context.state) }
while (!stream.eol()) {
readToken(mode, stream, context.state)
stream.start = stream.pos

  }

  }

 
}





  // SELECTION UPDATES






function callBlankLine(mode, state) {
if (mode.blankLine) { return mode.blankLine(state) }
if (!mode.innerMode) { return }
var inner = innerMode(mode, state)
if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
}





  // The 'scroll' parameter given to many of these indicated whether
// the new cursor position should be scrolled into view after
// modifying the selection.

// If shift is held or the extend flag is set, extends a range to
// include a given position (and optionally a second position).
// Otherwise, simply returns the range between the given positions.
// Used for cursor motion and such.
function extendRange(doc, range, head, other) {
if (doc.cm && doc.cm.display.shift || doc.extend) {
var anchor = range.anchor;
if (other) {
var posBefore = cmp(head, anchor) < 0;
if (posBefore != (cmp(other, anchor) < 0)) {
anchor = head;
head = other;
} else if (posBefore != (cmp(head, other) < 0)) {
head = other;
}
}
return new Range(anchor, head);
} else {
return new Range(other || head, head);
}

function readToken(mode, stream, state, inner) {
for (var i = 0; i < 10; i++) {
if (inner) { inner[0] = innerMode(mode, state).mode }
var style = mode.token(stream, state)
if (stream.pos > stream.start) { return style }




















  }

  }

 
  throw new Error("Mode " + mode.name + " failed to advance stream.")
}





  // Extend the primary selection range, discard the rest.
function extendSelection(doc, head, other, options) {
setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, other)], 0), options);
}



var Token = function(stream, type, state) {
this.start = stream.start; this.end = stream.pos
this.string = stream.current()
this.type = type || null
this.state = state
};





  // Extend all selections (pos is an array of selections with length
// equal the number of selections)
function extendSelections(doc, heads, options) {
for (var out = [], i = 0; i < doc.sel.ranges.length; i++)
out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null);
var newSel = normalizeSelection(out, doc.sel.primIndex);
setSelection(doc, newSel, options);





// Utility for getTokenAt and getLineTokens
function takeToken(cm, pos, precise, asArray) {
var doc = cm.doc, mode = doc.mode, style
pos = clipPos(doc, pos)
var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise)
var stream = new StringStream(line.text, cm.options.tabSize, context), tokens
if (asArray) { tokens = [] }
while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
stream.start = stream.pos
style = readToken(mode, stream, context.state)
if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))) }

  }

  }

 
  return asArray ? tokens : new Token(stream, style, context.state)
}





  // Updates a single range in the selection.
function replaceOneSelection(doc, i, range, options) {
var ranges = doc.sel.ranges.slice(0);
ranges[i] = range;
setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
}








function extractLineClasses(type, output) {
if (type) { for (;;) {
var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/)
if (!lineClass) { break }
type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length)
var prop = lineClass[1] ? "bgClass" : "textClass"
if (output[prop] == null)
{ output[prop] = lineClass[2] }
else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
{ output[prop] += " " + lineClass[2] }
} }
return type
}





  // Reset the selection to a single range.
function setSimpleSelection(doc, anchor, head, options) {
setSelection(doc, simpleSelection(anchor, head), options);



























// Run the given mode's parser over a line, calling f for each token.
function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
var flattenSpans = mode.flattenSpans
if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans }
var curStart = 0, curStyle = null
var stream = new StringStream(text, cm.options.tabSize, context), style
var inner = cm.options.addModeClass && [null]
if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses) }
while (!stream.eol()) {
if (stream.pos > cm.options.maxHighlightLength) {
flattenSpans = false
if (forceToEnd) { processLine(cm, text, context, stream.pos) }
stream.pos = text.length
style = null
} else {
style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses)
}
if (inner) {
var mName = inner[0].name
if (mName) { style = "m-" + (style ? mName + " " + style : mName) }
}
if (!flattenSpans || curStyle != style) {
while (curStart < stream.start) {
curStart = Math.min(stream.start, curStart + 5000)
f(curStart, curStyle)
}
curStyle = style
}
stream.start = stream.pos

  }

  }


// Give beforeSelectionChange handlers a change to influence a
// selection update.
function filterSelectionChange(doc, sel) {
var obj = {
ranges: sel.ranges,
update: function(ranges) {
this.ranges = [];
for (var i = 0; i < ranges.length; i++)
this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
clipPos(doc, ranges[i].head));
}
};
signal(doc, "beforeSelectionChange", doc, obj);
if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.ranges.length - 1);
else return sel;

  while (curStart < stream.pos) {
// Webkit seems to refuse to render text nodes longer than 57444
// characters, and returns inaccurate measurements in nodes
// starting around 5000 chars.
var pos = Math.min(stream.pos, curStart + 5000)
f(pos, curStyle)
curStart = pos











  }

  }

 
}





  function setSelectionReplaceHistory(doc, sel, options) {
var done = doc.history.done, last = lst(done);
if (last && last.ranges) {
done[done.length - 1] = sel;
setSelectionNoUndo(doc, sel, options);
} else {
setSelection(doc, sel, options);











// Finds the line to start with when starting a parse. Tries to
// find a line with a stateAfter, so that it can start with a
// valid state. If that fails, it returns the line with the
// smallest indentation, which tends to need the least context to
// parse correctly.
function findStartLine(cm, n, precise) {
var minindent, minline, doc = cm.doc
var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100)
for (var search = n; search > lim; --search) {
if (search <= doc.first) { return doc.first }
var line = getLine(doc, search - 1), after = line.stateAfter
if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
{ return search }
var indented = countColumn(line.text, null, cm.options.tabSize)
if (minline == null || minindent > indented) {
minline = search - 1
minindent = indented

    }
}

    }
}

 
  return minline
}





  // Set a new selection.
function setSelection(doc, sel, options) {
setSelectionNoUndo(doc, sel, options);
addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);










function retreatFrontier(doc, n) {
doc.modeFrontier = Math.min(doc.modeFrontier, n)
if (doc.highlightFrontier < n - 10) { return }
var start = doc.first
for (var line = n - 1; line > start; line--) {
var saved = getLine(doc, line).stateAfter
// change is on 3
// state on line 1 looked ahead 2 -- so saw 3
// test 1 + 2 < 3 should cover this
if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
start = line + 1
break
}

  }

  }

 
  doc.highlightFrontier = Math.min(doc.highlightFrontier, start)
}





  function setSelectionNoUndo(doc, sel, options) {
if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
sel = filterSelectionChange(doc, sel);

// LINE DATA STRUCTURE







    var bias = options && options.bias ||
(cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));





// Line objects. These hold state related to a line, including
// highlighting info (the styles array).
var Line = function(text, markedSpans, estimateHeight) {
this.text = text
attachMarkedSpans(this, markedSpans)
this.height = estimateHeight ? estimateHeight(this) : 1
};





    if (!(options && options.scroll === false) && doc.cm)
ensureCursorVisible(doc.cm);
}

Line.prototype.lineNo = function () { return lineNo(this) };
eventMixin(Line)






  function setSelectionInner(doc, sel) {
if (sel.equals(doc.sel)) return;












// Change the content (text, markers) of a line. Automatically
// invalidates cached information and tries to re-estimate the
// line's height.
function updateLine(line, text, markedSpans, estimateHeight) {
line.text = text
if (line.stateAfter) { line.stateAfter = null }
if (line.styles) { line.styles = null }
if (line.order != null) { line.order = null }
detachMarkedSpans(line)
attachMarkedSpans(line, markedSpans)
var estHeight = estimateHeight ? estimateHeight(line) : 1
if (estHeight != line.height) { updateLineHeight(line, estHeight) }
}





    doc.sel = sel;





// Detach a line from the document tree and its markers.
function cleanUpLine(line) {
line.parent = null
detachMarkedSpans(line)
}





    if (doc.cm) {
doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
signalCursorActivity(doc.cm);











































// Convert a style as returned by a mode (either null, or a string
// containing one or more styles) to a CSS style. This is cached,
// and also looks for line-wide styles.
var styleToClassCache = {};
var styleToClassCacheWithMode = {};
function interpretTokenStyle(style, options) {
if (!style || /^\s*$/.test(style)) { return null }
var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache
return cache[style] ||
(cache[style] = style.replace(/\S+/g, "cm-$&"))
}

// Render the DOM representation of the text of a line. Also builds
// up a 'line map', which points at the DOM nodes that represent
// specific stretches of text, and is used by the measuring code.
// The returned object contains the DOM node, this map, and
// information about line-wide styles that were set by the mode.
function buildLineContent(cm, lineView) {
// The padding-right forces the element to have a 'border', which
// is needed on Webkit to be able to get line-level bounding
// rectangles for it (in measureChar).
var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null)
var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
col: 0, pos: 0, cm: cm,
trailingSpace: false,
splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")}
lineView.measure = {}

// Iterate over the logical lines that make up this visual line.
for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0)
builder.pos = 0
builder.addToken = buildToken
// Optionally wire in some hacks into the token-rendering
// algorithm, to deal with browser quirks.
if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
{ builder.addToken = buildTokenBadBidi(builder.addToken, order) }
builder.map = []
var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line)
insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate))
if (line.styleClasses) {
if (line.styleClasses.bgClass)
{ builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "") }
if (line.styleClasses.textClass)
{ builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "") }

    }

    }

    signalLater(doc, "cursorActivity", doc);
}

 




  // Verify that the selection does not partially select any atomic
// marked ranges.
function reCheckSelection(doc) {
setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel_dontScroll);
}

    // Ensure at least a single node is present, for measuring.
if (builder.map.length == 0)
{ builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))) }







  // Return a selection that does not partially select any atomic
// ranges.
function skipAtomicInSelection(doc, sel, bias, mayClear) {
var out;
for (var i = 0; i < sel.ranges.length; i++) {
var range = sel.ranges[i];
var newAnchor = skipAtomic(doc, range.anchor, bias, mayClear);
var newHead = skipAtomic(doc, range.head, bias, mayClear);
if (out || newAnchor != range.anchor || newHead != range.head) {
if (!out) out = sel.ranges.slice(0, i);
out[i] = new Range(newAnchor, newHead);
}

    // Store the map and a cache object for the current logical line
if (i == 0) {
lineView.measure.map = builder.map
lineView.measure.cache = {}
} else {
;(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
;(lineView.measure.caches || (lineView.measure.caches = [])).push({})






    }

    }

    return out ? normalizeSelection(out, sel.primIndex) : sel;

 
  }


  }


  // Ensure a given position is not inside an atomic range.
function skipAtomic(doc, pos, bias, mayClear) {
var flipped = false, curPos = pos;
var dir = bias || 1;
doc.cantEdit = false;
search: for (;;) {
var line = getLine(doc, curPos.line);
if (line.markedSpans) {
for (var i = 0; i < line.markedSpans.length; ++i) {
var sp = line.markedSpans[i], m = sp.marker;
if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
(sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
if (mayClear) {
signal(m, "beforeCursorEnter");
if (m.explicitlyCleared) {
if (!line.markedSpans) break;
else {--i; continue;}
}
}
if (!m.atomic) continue;
var newPos = m.find(dir < 0 ? -1 : 1);
if (cmp(newPos, curPos) == 0) {
newPos.ch += dir;
if (newPos.ch < 0) {
if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1));
else newPos = null;
} else if (newPos.ch > line.text.length) {
if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0);
else newPos = null;
}
if (!newPos) {
if (flipped) {
// Driven in a corner -- no valid cursor position found at all
// -- try again *with* clearing, if we didn't already
if (!mayClear) return skipAtomic(doc, pos, bias, true);
// Otherwise, turn off editing until further notice, and return the start of the doc
doc.cantEdit = true;
return Pos(doc.first, 0);
}
flipped = true; newPos = pos; dir = -dir;
}
}
curPos = newPos;
continue search;
}
}
}
return curPos;
}

  // See issue #2901
if (webkit) {
var last = builder.content.lastChild
if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
{ builder.content.className = "cm-tab-wrap-hack" }













































  }


  }


  // SELECTION DRAWING



  signal(cm, "renderLine", cm, lineView.line, builder.pre)
if (builder.pre.className)
{ builder.textClass = joinClasses(builder.pre.className, builder.textClass || "") }





  // Redraw the selection and/or cursor
function drawSelection(cm) {
var display = cm.display, doc = cm.doc, result = {};
var curFragment = result.cursors = document.createDocumentFragment();
var selFragment = result.selection = document.createDocumentFragment();

  return builder
}








    for (var i = 0; i < doc.sel.ranges.length; i++) {
var range = doc.sel.ranges[i];
var collapsed = range.empty();
if (collapsed || cm.options.showCursorWhenSelecting)
drawSelectionCursor(cm, range, curFragment);
if (!collapsed)
drawSelectionRange(cm, range, selFragment);
}

function defaultSpecialCharPlaceholder(ch) {
var token = elt("span", "\u2022", "cm-invalidchar")
token.title = "\\u" + ch.charCodeAt(0).toString(16)
token.setAttribute("aria-label", token.title)
return token
}







    // Move the hidden textarea near the cursor to prevent scrolling artifacts
if (cm.options.moveInputWithCursor) {
var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
headPos.top + lineOff.top - wrapOff.top));
result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
headPos.left + lineOff.left - wrapOff.left));











































// Build up the DOM representation for a single token, and add it to
// the line map. Takes care to render special characters separately.
function buildToken(builder, text, style, startStyle, endStyle, title, css) {
if (!text) { return }
var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text
var special = builder.cm.state.specialChars, mustWrap = false
var content
if (!special.test(text)) {
builder.col += text.length
content = document.createTextNode(displayText)
builder.map.push(builder.pos, builder.pos + text.length, content)
if (ie && ie_version < 9) { mustWrap = true }
builder.pos += text.length
} else {
content = document.createDocumentFragment()
var pos = 0
while (true) {
special.lastIndex = pos
var m = special.exec(text)
var skipped = m ? m.index - pos : text.length - pos
if (skipped) {
var txt = document.createTextNode(displayText.slice(pos, pos + skipped))
if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])) }
else { content.appendChild(txt) }
builder.map.push(builder.pos, builder.pos + skipped, txt)
builder.col += skipped
builder.pos += skipped
}
if (!m) { break }
pos += skipped + 1
var txt$1 = (void 0)
if (m[0] == "\t") {
var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize
txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"))
txt$1.setAttribute("role", "presentation")
txt$1.setAttribute("cm-text", "\t")
builder.col += tabWidth
} else if (m[0] == "\r" || m[0] == "\n") {
txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"))
txt$1.setAttribute("cm-text", m[0])
builder.col += 1
} else {
txt$1 = builder.cm.options.specialCharPlaceholder(m[0])
txt$1.setAttribute("cm-text", m[0])
if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])) }
else { content.appendChild(txt$1) }
builder.col += 1
}
builder.map.push(builder.pos, builder.pos + 1, txt$1)
builder.pos++

    }

    }

 
  }
builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32
if (style || startStyle || endStyle || mustWrap || css) {
var fullStyle = style || ""
if (startStyle) { fullStyle += startStyle }
if (endStyle) { fullStyle += endStyle }
var token = elt("span", [content], fullStyle, css)
if (title) { token.title = title }
return builder.content.appendChild(token)
}
builder.content.appendChild(content)
}





    return result;









function splitSpaces(text, trailingBefore) {
if (text.length > 1 && !/ /.test(text)) { return text }
var spaceBefore = trailingBefore, result = ""
for (var i = 0; i < text.length; i++) {
var ch = text.charAt(i)
if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
{ ch = "\u00a0" }
result += ch
spaceBefore = ch == " "

  }

  }

 
  return result
}





  function showSelection(cm, drawn) {
removeChildrenAndAdd(cm.display.cursorDiv, drawn.cursors);
removeChildrenAndAdd(cm.display.selectionDiv, drawn.selection);
if (drawn.teTop != null) {
cm.display.inputDiv.style.top = drawn.teTop + "px";
cm.display.inputDiv.style.left = drawn.teLeft + "px";













// Work around nonsense dimensions being reported for stretches of
// right-to-left text.
function buildTokenBadBidi(inner, order) {
return function (builder, text, style, startStyle, endStyle, title, css) {
style = style ? style + " cm-force-border" : "cm-force-border"
var start = builder.pos, end = start + text.length
for (;;) {
// Find the part that overlaps with the start of this text
var part = (void 0)
for (var i = 0; i < order.length; i++) {
part = order[i]
if (part.to > start && part.from <= start) { break }
}
if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, title, css) }
inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css)
startStyle = null
text = text.slice(part.to - start)
start = part.to

    }
}

    }
}

 
}





  function updateSelection(cm) {
showSelection(cm, drawSelection(cm));






function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
var widget = !ignoreWidget && marker.widgetNode
if (widget) { builder.map.push(builder.pos, builder.pos + size, widget) }
if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
if (!widget)
{ widget = builder.content.appendChild(document.createElement("span")) }
widget.setAttribute("cm-marker", marker.id)

  }

  }

 
  if (widget) {
builder.cm.display.input.setUneditable(widget)
builder.content.appendChild(widget)
}
builder.pos += size
builder.trailingSpace = false
}





  // Draws a cursor for the given range
function drawSelectionCursor(cm, range, output) {
var pos = cursorCoords(cm, range.head, "div", null, null, !cm.options.singleCursorHeightPerLine);

var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
cursor.style.left = pos.left + "px";
cursor.style.top = pos.top + "px";
cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";

if (pos.other) {
// Secondary cursor, shown when on a 'jump' in bi-directional text
var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
otherCursor.style.display = "";
otherCursor.style.left = pos.other.left + "px";
otherCursor.style.top = pos.other.top + "px";
otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
}

// Outputs a number of spans to make up a line, taking highlighting
// and marked text into account.
function insertLineContent(line, builder, styles) {
var spans = line.markedSpans, allText = line.text, at = 0
if (!spans) {
for (var i$1 = 1; i$1 < styles.length; i$1+=2)
{ builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)) }
return










  }


  }


  // Draws the given range as a highlighted selection
function drawSelectionRange(cm, range, output) {
var display = cm.display, doc = cm.doc;
var fragment = document.createDocumentFragment();
var padding = paddingH(cm.display), leftSide = padding.left;
var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;

function add(left, top, width, bottom) {
if (top < 0) top = 0;
top = Math.round(top);
bottom = Math.round(bottom);
fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
"px; top: " + top + "px; width: " + (width == null ? rightSide - left : width) +
"px; height: " + (bottom - top) + "px"));
}















  var len = allText.length, pos = 0, i = 1, text = "", style, css
var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed
for (;;) {
if (nextChange == pos) { // Update current marker set
spanStyle = spanEndStyle = spanStartStyle = title = css = ""
collapsed = null; nextChange = Infinity
var foundBookmarks = [], endStyles = (void 0)
for (var j = 0; j < spans.length; ++j) {
var sp = spans[j], m = sp.marker
if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
foundBookmarks.push(m)
} else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
if (sp.to != null && sp.to != pos && nextChange > sp.to) {
nextChange = sp.to
spanEndStyle = ""
}
if (m.className) { spanStyle += " " + m.className }
if (m.css) { css = (css ? css + ";" : "") + m.css }
if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle }
if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to) }
if (m.title && !title) { title = m.title }
if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
{ collapsed = sp }
} else if (sp.from > pos && nextChange > sp.from) {
nextChange = sp.from
}
}
if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
{ if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1] } } }





    function drawForLine(line, fromArg, toArg) {
var lineObj = getLine(doc, line);
var lineLen = lineObj.text.length;
var start, end;
function coords(ch, bias) {
return charCoords(cm, Pos(line, ch), "div", lineObj, bias);


      if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
{ buildCollapsedSpan(builder, 0, foundBookmarks[j$2]) } }
if (collapsed && (collapsed.from || 0) == pos) {
buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
collapsed.marker, collapsed.from == null)
if (collapsed.to == null) { return }
if (collapsed.to == pos) { collapsed = false }

      }

      }


iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
var leftPos = coords(from, "left"), rightPos, left, right;
if (from == to) {
rightPos = leftPos;
left = right = leftPos.left;
} else {
rightPos = coords(to - 1, "right");
if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
left = leftPos.left;
right = rightPos.right;
}
if (fromArg == null && from == 0) left = leftSide;
if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
add(left, leftPos.top, null, leftPos.bottom);
left = leftSide;
if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
}
if (toArg == null && to == lineLen) right = rightSide;
if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
start = leftPos;
if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
end = rightPos;
if (left < leftSide + 1) left = leftSide;
add(left, rightPos.top, right - left, rightPos.bottom);
});
return {start: start, end: end};

 
    }

    }

 
    if (pos >= len) { break }





    var sFrom = range.from(), sTo = range.to();
if (sFrom.line == sTo.line) {
drawForLine(sFrom.line, sFrom.ch, sTo.ch);
} else {
var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
var singleVLine = visualLine(fromLine) == visualLine(toLine);
var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
if (singleVLine) {
if (leftEnd.top < rightStart.top - 2) {
add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
} else {
add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);

    var upto = Math.min(len, nextChange)
while (true) {
if (text) {
var end = pos + text.length
if (!collapsed) {
var tokenText = end > upto ? text.slice(0, upto - pos) : text
builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css)







        }

        }

 
        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
pos = end
spanStartStyle = ""

      }

      }

      if (leftEnd.bottom < rightStart.top)
add(leftSide, leftEnd.bottom, null, rightStart.top);

      text = allText.slice(at, at = styles[i++])
style = interpretTokenStyle(styles[i++], builder.cm.options)

    }

    }


output.appendChild(fragment);

 
  }

  }

 
}





  // Cursor-blinking
function restartBlink(cm) {
if (!cm.state.focused) return;
var display = cm.display;
clearInterval(display.blinker);
var on = true;
display.cursorDiv.style.visibility = "";
if (cm.options.cursorBlinkRate > 0)
display.blinker = setInterval(function() {
display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
}, cm.options.cursorBlinkRate);
else if (cm.options.cursorBlinkRate < 0)
display.cursorDiv.style.visibility = "hidden";
}

 




  // HIGHLIGHT WORKER













// These objects are used to represent the visible (currently drawn)
// part of the document. A LineView may correspond to multiple
// logical lines, if those are connected by collapsed ranges.
function LineView(doc, line, lineN) {
// The starting line
this.line = line
// Continuing lines, if any
this.rest = visualLineContinued(line)
// Number of logical lines in this visual line
this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1
this.node = this.text = null
this.hidden = lineIsHidden(doc, line)
}





  function startWorker(cm, time) {
if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
cm.state.highlight.set(time, bind(highlightWorker, cm));





// Create a range of LineView objects for the given lines.
function buildViewArray(cm, from, to) {
var array = [], nextPos
for (var pos = from; pos < to; pos = nextPos) {
var view = new LineView(cm.doc, getLine(cm.doc, pos), pos)
nextPos = pos + view.size
array.push(view)

  }

  }

 
  return array
}





  function highlightWorker(cm) {
var doc = cm.doc;
if (doc.frontier < doc.first) doc.frontier = doc.first;
if (doc.frontier >= cm.display.viewTo) return;
var end = +new Date + cm.options.workTime;
var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
var changedLines = [];

var operationGroup = null











    doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function(line) {
if (doc.frontier >= cm.display.viewFrom) { // Visible
var oldStyles = line.styles;
var highlighted = highlightLine(cm, line, state, true);
line.styles = highlighted.styles;
var oldCls = line.styleClasses, newCls = highlighted.classes;
if (newCls) line.styleClasses = newCls;
else if (oldCls) line.styleClasses = null;
var ischange = !oldStyles || oldStyles.length != line.styles.length ||
oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
if (ischange) changedLines.push(doc.frontier);
line.stateAfter = copyState(doc.mode, state);
} else {
processLine(cm, line.text, state);
line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
}
++doc.frontier;
if (+new Date > end) {
startWorker(cm, cm.options.workDelay);
return true;
}
});
if (changedLines.length) runInOp(cm, function() {
for (var i = 0; i < changedLines.length; i++)
regLineChange(cm, changedLines[i], "text");
});

function pushOperation(op) {
if (operationGroup) {
operationGroup.ops.push(op)
} else {
op.ownsGroup = operationGroup = {
ops: [op],
delayedCallbacks: []
}




















  }

  }

 
}





  // Finds the line to start with when starting a parse. Tries to
// find a line with a stateAfter, so that it can start with a
// valid state. If that fails, it returns the line with the
// smallest indentation, which tends to need the least context to
// parse correctly.
function findStartLine(cm, n, precise) {
var minindent, minline, doc = cm.doc;
var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
for (var search = n; search > lim; --search) {
if (search <= doc.first) return doc.first;
var line = getLine(doc, search - 1);
if (line.stateAfter && (!precise || search <= doc.frontier)) return search;
var indented = countColumn(line.text, null, cm.options.tabSize);
if (minline == null || minindent > indented) {
minline = search - 1;
minindent = indented;
}

function fireCallbacksForOps(group) {
// Calls delayed callbacks and cursorActivity handlers until no
// new ones appear
var callbacks = group.delayedCallbacks, i = 0
do {
for (; i < callbacks.length; i++)
{ callbacks[i].call(null) }
for (var j = 0; j < group.ops.length; j++) {
var op = group.ops[j]
if (op.cursorActivityHandlers)
{ while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
{ op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm) } }






    }

    }

    return minline;
}

  } while (i < callbacks.length)
}





  function getStateBefore(cm, n, precise) {
var doc = cm.doc, display = cm.display;
if (!doc.mode.startState) return true;
var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
if (!state) state = startState(doc.mode);
else state = copyState(doc.mode, state);
doc.iter(pos, n, function(line) {
processLine(cm, line.text, state);
var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo;
line.stateAfter = save ? copyState(doc.mode, state) : null;
++pos;
});
if (precise) doc.frontier = pos;
return state;

function finishOperation(op, endCb) {
var group = op.ownsGroup
if (!group) { return }

try { fireCallbacksForOps(group) }
finally {
operationGroup = null
endCb(group)







  }

  }

 
}





  // POSITION MEASUREMENT

var orphanDelayedCallbacks = null





  function paddingTop(display) {return display.lineSpace.offsetTop;}
function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;}
function paddingH(display) {
if (display.cachedPaddingH) return display.cachedPaddingH;
var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data;
return data;










// Often, we want to signal events at a point where we are in the
// middle of some work, but don't want the handler to start calling
// other methods on the editor, which might be in an inconsistent
// state or simply not expect any other events to happen.
// signalLater looks whether there are any handlers, and schedules
// them to be executed when the last operation ends, or, if no
// operation is active, when a timeout fires.
function signalLater(emitter, type /*, values...*/) {
var arr = getHandlers(emitter, type)
if (!arr.length) { return }
var args = Array.prototype.slice.call(arguments, 2), list
if (operationGroup) {
list = operationGroup.delayedCallbacks
} else if (orphanDelayedCallbacks) {
list = orphanDelayedCallbacks
} else {
list = orphanDelayedCallbacks = []
setTimeout(fireOrphanDelayed, 0)

  }

  }

 
  var loop = function ( i ) {
list.push(function () { return arr[i].apply(null, args); })
};





  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth; }
function displayWidth(cm) {
return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth;
}
function displayHeight(cm) {
return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight;
}

  for (var i = 0; i < arr.length; ++i)
loop( i );
}









  // Ensure the lineView.wrapping.heights array is populated. This is
// an array of bottom offsets for the lines that make up a drawn
// line. When lineWrapping is on, there might be more than one
// height.
function ensureLineHeights(cm, lineView, rect) {
var wrapping = cm.options.lineWrapping;
var curWidth = wrapping && displayWidth(cm);
if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
var heights = lineView.measure.heights = [];
if (wrapping) {
lineView.measure.width = curWidth;
var rects = lineView.text.firstChild.getClientRects();
for (var i = 0; i < rects.length - 1; i++) {
var cur = rects[i], next = rects[i + 1];
if (Math.abs(cur.bottom - next.bottom) > 2)
heights.push((cur.bottom + next.top) / 2 - rect.top);
}
}
heights.push(rect.bottom - rect.top);
}

function fireOrphanDelayed() {
var delayed = orphanDelayedCallbacks
orphanDelayedCallbacks = null
for (var i = 0; i < delayed.length; ++i) { delayed[i]() }
}

// When an aspect of a line changes, a string is added to
// lineView.changes. This updates the relevant part of the line's
// DOM structure.
function updateLineForChanges(cm, lineView, lineN, dims) {
for (var j = 0; j < lineView.changes.length; j++) {
var type = lineView.changes[j]
if (type == "text") { updateLineText(cm, lineView) }
else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims) }
else if (type == "class") { updateLineClasses(cm, lineView) }
else if (type == "widget") { updateLineWidgets(cm, lineView, dims) }





  }

  }

 
  lineView.changes = null
}





  // Find a line map (mapping character offsets to text nodes) and a
// measurement cache for the given line number. (A line view might
// contain multiple lines when collapsed ranges are present.)
function mapFromLineView(lineView, line, lineN) {
if (lineView.line == line)
return {map: lineView.measure.map, cache: lineView.measure.cache};
for (var i = 0; i < lineView.rest.length; i++)
if (lineView.rest[i] == line)
return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]};
for (var i = 0; i < lineView.rest.length; i++)
if (lineNo(lineView.rest[i]) > lineN)
return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i], before: true};

// Lines with gutter elements, widgets or a background class need to
// be wrapped, and have the extra elements added to the wrapper div
function ensureLineWrapped(lineView) {
if (lineView.node == lineView.text) {
lineView.node = elt("div", null, null, "position: relative")
if (lineView.text.parentNode)
{ lineView.text.parentNode.replaceChild(lineView.node, lineView.text) }
lineView.node.appendChild(lineView.text)
if (ie && ie_version < 8) { lineView.node.style.zIndex = 2 }




  }

  }

 
  return lineView.node
}





  // Render a line into the hidden node display.externalMeasured. Used
// when measurement is needed for a line that's not in the viewport.
function updateExternalMeasurement(cm, line) {
line = visualLine(line);
var lineN = lineNo(line);
var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
view.lineN = lineN;
var built = view.built = buildLineContent(cm, view);
view.text = built.pre;
removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
return view;

function updateLineBackground(cm, lineView) {
var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass
if (cls) { cls += " CodeMirror-linebackground" }
if (lineView.background) {
if (cls) { lineView.background.className = cls }
else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null }
} else if (cls) {
var wrap = ensureLineWrapped(lineView)
lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild)
cm.display.input.setUneditable(lineView.background)


  }

  }

 
}





  // Get a {top, bottom, left, right} box (in line-local coordinates)
// for a given character.
function measureChar(cm, line, ch, bias) {
return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias);





// Wrapper around buildLineContent which will reuse the structure
// in display.externalMeasured when possible.
function getLineContent(cm, lineView) {
var ext = cm.display.externalMeasured
if (ext && ext.line == lineView.line) {
cm.display.externalMeasured = null
lineView.measure = ext.measure
return ext.built

  }

  }

 
  return buildLineContent(cm, lineView)
}





  // Find a line view that corresponds to the given line number.
function findViewForLine(cm, lineN) {
if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
return cm.display.view[findViewIndex(cm, lineN)];
var ext = cm.display.externalMeasured;
if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
return ext;









// Redraw the line's text. Interacts with the background and text
// classes because the mode may output tokens that influence these
// classes.
function updateLineText(cm, lineView) {
var cls = lineView.text.className
var built = getLineContent(cm, lineView)
if (lineView.text == lineView.node) { lineView.node = built.pre }
lineView.text.parentNode.replaceChild(built.pre, lineView.text)
lineView.text = built.pre
if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
lineView.bgClass = built.bgClass
lineView.textClass = built.textClass
updateLineClasses(cm, lineView)
} else if (cls) {
lineView.text.className = cls

  }

  }

 
}





  // Measurement can be split in two steps, the set-up work that
// applies to the whole line, and the measurement of the actual
// character. Functions like coordsChar, that need to do a lot of
// measurements in a row, can thus ensure that the set-up work is
// only done once.
function prepareMeasureForLine(cm, line) {
var lineN = lineNo(line);
var view = findViewForLine(cm, lineN);
if (view && !view.text)
view = null;
else if (view && view.changes)
updateLineForChanges(cm, view, lineN, getDimensions(cm));
if (!view)
view = updateExternalMeasurement(cm, line);

function updateLineClasses(cm, lineView) {
updateLineBackground(cm, lineView)
if (lineView.line.wrapClass)
{ ensureLineWrapped(lineView).className = lineView.line.wrapClass }
else if (lineView.node != lineView.text)
{ lineView.node.className = "" }
var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass
lineView.text.className = textClass || ""
}










    var info = mapFromLineView(view, line, lineN);
return {
line: line, view: view, rect: null,
map: info.map, cache: info.cache, before: info.before,
hasHeights: false
};

function updateLineGutter(cm, lineView, lineN, dims) {
if (lineView.gutter) {
lineView.node.removeChild(lineView.gutter)
lineView.gutter = null



  }

  }

 
  if (lineView.gutterBackground) {
lineView.node.removeChild(lineView.gutterBackground)
lineView.gutterBackground = null
}
if (lineView.line.gutterClass) {
var wrap = ensureLineWrapped(lineView)
lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"))
cm.display.input.setUneditable(lineView.gutterBackground)
wrap.insertBefore(lineView.gutterBackground, lineView.text)
}
var markers = lineView.line.gutterMarkers
if (cm.options.lineNumbers || markers) {
var wrap$1 = ensureLineWrapped(lineView)
var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"))
cm.display.input.setUneditable(gutterWrap)
wrap$1.insertBefore(gutterWrap, lineView.text)
if (lineView.line.gutterClass)
{ gutterWrap.className += " " + lineView.line.gutterClass }
if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
{ lineView.lineNumber = gutterWrap.appendChild(
elt("div", lineNumberFor(cm.options, lineN),
"CodeMirror-linenumber CodeMirror-gutter-elt",
("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))) }
if (markers) { for (var k = 0; k < cm.options.gutters.length; ++k) {
var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]
if (found)
{ gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))) }
} }
}
}





  // Given a prepared measurement object, measures the position of an
// actual character (or fetches it from the cache).
function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
if (prepared.before) ch = -1;
var key = ch + (bias || ""), found;
if (prepared.cache.hasOwnProperty(key)) {
found = prepared.cache[key];
} else {
if (!prepared.rect)
prepared.rect = prepared.view.text.getBoundingClientRect();
if (!prepared.hasHeights) {
ensureLineHeights(cm, prepared.view, prepared.rect);
prepared.hasHeights = true;
}
found = measureCharInner(cm, prepared, ch, bias);
if (!found.bogus) prepared.cache[key] = found;
}
return {left: found.left, right: found.right,
top: varHeight ? found.rtop : found.top,
bottom: varHeight ? found.rbottom : found.bottom};

function updateLineWidgets(cm, lineView, dims) {
if (lineView.alignable) { lineView.alignable = null }
for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
next = node.nextSibling
if (node.className == "CodeMirror-linewidget")
{ lineView.node.removeChild(node) }















  }

  }

 
  insertLineWidgets(cm, lineView, dims)
}





  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};






// Build a line's DOM representation from scratch
function buildLineElement(cm, lineView, lineN, dims) {
var built = getLineContent(cm, lineView)
lineView.text = lineView.node = built.pre
if (built.bgClass) { lineView.bgClass = built.bgClass }
if (built.textClass) { lineView.textClass = built.textClass }





  function measureCharInner(cm, prepared, ch, bias) {
var map = prepared.map;




  updateLineClasses(cm, lineView)
updateLineGutter(cm, lineView, lineN, dims)
insertLineWidgets(cm, lineView, dims)
return lineView.node
}





    var node, start, end, collapse;
// First, search the line map for the text node corresponding to,
// or closest to, the target character.
for (var i = 0; i < map.length; i += 3) {
var mStart = map[i], mEnd = map[i + 1];
if (ch < mStart) {
start = 0; end = 1;
collapse = "left";
} else if (ch < mEnd) {
start = ch - mStart;
end = start + 1;
} else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
end = mEnd - mStart;
start = end - 1;
if (ch >= mEnd) collapse = "right";
}
if (start != null) {
node = map[i + 2];
if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
collapse = bias;
if (bias == "left" && start == 0)
while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
node = map[(i -= 3) + 2];
collapse = "left";
}
if (bias == "right" && start == mEnd - mStart)
while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
node = map[(i += 3) + 2];
collapse = "right";
}
break;
}
}

// A lineView may contain multiple logical lines (when merged by
// collapsed spans). The widgets for all of them need to be drawn.
function insertLineWidgets(cm, lineView, dims) {
insertLineWidgetsFor(cm, lineView.line, lineView, dims, true)
if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
{ insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false) } }
}































    var rect;
if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
for (var i = 0; i < 4; i++) { // Retry a maximum of 4 times when nonsense rectangles are returned
while (start && isExtendingChar(prepared.line.text.charAt(mStart + start))) --start;
while (mStart + end < mEnd && isExtendingChar(prepared.line.text.charAt(mStart + end))) ++end;
if (ie && ie_version < 9 && start == 0 && end == mEnd - mStart) {
rect = node.parentNode.getBoundingClientRect();
} else if (ie && cm.options.lineWrapping) {
var rects = range(node, start, end).getClientRects();
if (rects.length)
rect = rects[bias == "right" ? rects.length - 1 : 0];
else
rect = nullRect;
} else {
rect = range(node, start, end).getBoundingClientRect() || nullRect;
}
if (rect.left || rect.right || start == 0) break;
end = start;
start = start - 1;
collapse = "right";
}
if (ie && ie_version < 11) rect = maybeUpdateRectForZooming(cm.display.measure, rect);
} else { // If it is a widget, simply get the box for the whole widget.
if (start > 0) collapse = bias = "right";
var rects;
if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
rect = rects[bias == "right" ? rects.length - 1 : 0];
else
rect = node.getBoundingClientRect();
}
if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
var rSpan = node.parentNode.getClientRects()[0];
if (rSpan)
rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom};
else
rect = nullRect;
}

var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
var mid = (rtop + rbot) / 2;
var heights = prepared.view.measure.heights;
for (var i = 0; i < heights.length - 1; i++)
if (mid < heights[i]) break;
var top = i ? heights[i - 1] : 0, bot = heights[i];
var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
top: top, bottom: bot};
if (!rect.left && !rect.right) result.bogus = true;
if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }

return result;

function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
if (!line.widgets) { return }
var wrap = ensureLineWrapped(lineView)
for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget")
if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true") }
positionLineWidget(widget, node, lineView, dims)
cm.display.input.setUneditable(node)
if (allowAbove && widget.above)
{ wrap.insertBefore(node, lineView.gutter || lineView.text) }
else
{ wrap.appendChild(node) }
signalLater(widget, "redraw")







































  }

  }

 
}





  // Work around problem with bounding client rects on ranges being
// returned incorrectly when zoomed on IE10 and below.
function maybeUpdateRectForZooming(measure, rect) {
if (!window.screen || screen.logicalXDPI == null ||
screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
return rect;
var scaleX = screen.logicalXDPI / screen.deviceXDPI;
var scaleY = screen.logicalYDPI / screen.deviceYDPI;
return {left: rect.left * scaleX, right: rect.right * scaleX,
top: rect.top * scaleY, bottom: rect.bottom * scaleY};

function positionLineWidget(widget, node, lineView, dims) {
if (widget.noHScroll) {
;(lineView.alignable || (lineView.alignable = [])).push(node)
var width = dims.wrapperWidth
node.style.left = dims.fixedPos + "px"
if (!widget.coverGutter) {
width -= dims.gutterTotalWidth
node.style.paddingLeft = dims.gutterTotalWidth + "px"
}
node.style.width = width + "px"

  }

  }


function clearLineMeasurementCacheFor(lineView) {
if (lineView.measure) {
lineView.measure.cache = {};
lineView.measure.heights = null;
if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
lineView.measure.caches[i] = {};
}

  if (widget.coverGutter) {
node.style.zIndex = 5
node.style.position = "relative"
if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px" }





  }

  }

 
}





  function clearLineMeasurementCache(cm) {
cm.display.externalMeasure = null;
removeChildren(cm.display.lineMeasure);
for (var i = 0; i < cm.display.view.length; i++)
clearLineMeasurementCacheFor(cm.display.view[i]);







function widgetHeight(widget) {
if (widget.height != null) { return widget.height }
var cm = widget.doc.cm
if (!cm) { return 0 }
if (!contains(document.body, widget.node)) {
var parentStyle = "position: relative;"
if (widget.coverGutter)
{ parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;" }
if (widget.noHScroll)
{ parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;" }
removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle))

  }

  }

 
  return widget.height = widget.node.parentNode.offsetHeight
}





  function clearCaches(cm) {
clearLineMeasurementCache(cm);
cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
cm.display.lineNumChars = null;


// Return true when the given mouse event happened in a widget
function eventInWidget(display, e) {
for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
(n.parentNode == display.sizer && n != display.mover))
{ return true }

  }

  }

 
}





  function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }

// POSITION MEASUREMENT






  // Converts a {top, bottom, left, right} box from line-local
// coordinates into another coordinate system. Context may be one of
// "line", "div" (display.lineDiv), "local"/null (editor), "window",
// or "page".
function intoCoordSystem(cm, lineObj, rect, context) {
if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
var size = widgetHeight(lineObj.widgets[i]);
rect.top += size; rect.bottom += size;
}
if (context == "line") return rect;
if (!context) context = "local";
var yOff = heightAtLine(lineObj);
if (context == "local") yOff += paddingTop(cm.display);
else yOff -= cm.display.viewOffset;
if (context == "page" || context == "window") {
var lOff = cm.display.lineSpace.getBoundingClientRect();
yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
rect.left += xOff; rect.right += xOff;


















function paddingTop(display) {return display.lineSpace.offsetTop}
function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
function paddingH(display) {
if (display.cachedPaddingH) { return display.cachedPaddingH }
var e = removeChildrenAndAdd(display.measure, elt("pre", "x"))
var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle
var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)}
if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data }
return data
}

function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
function displayWidth(cm) {
return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
}
function displayHeight(cm) {
return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
}

// Ensure the lineView.wrapping.heights array is populated. This is
// an array of bottom offsets for the lines that make up a drawn
// line. When lineWrapping is on, there might be more than one
// height.
function ensureLineHeights(cm, lineView, rect) {
var wrapping = cm.options.lineWrapping
var curWidth = wrapping && displayWidth(cm)
if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
var heights = lineView.measure.heights = []
if (wrapping) {
lineView.measure.width = curWidth
var rects = lineView.text.firstChild.getClientRects()
for (var i = 0; i < rects.length - 1; i++) {
var cur = rects[i], next = rects[i + 1]
if (Math.abs(cur.bottom - next.bottom) > 2)
{ heights.push((cur.bottom + next.top) / 2 - rect.top) }
}

    }

    }

    rect.top += yOff; rect.bottom += yOff;
return rect;

    heights.push(rect.bottom - rect.top)


  }

  }

 
}





  // Coverts a box from "div" coords to another coordinate system.
// Context may be "window", "page", "div", or "local"/null.
function fromCoordSystem(cm, coords, context) {
if (context == "div") return coords;
var left = coords.left, top = coords.top;
// First move into "page" coordinate system
if (context == "page") {
left -= pageScrollX();
top -= pageScrollY();
} else if (context == "local" || !context) {
var localBox = cm.display.sizer.getBoundingClientRect();
left += localBox.left;
top += localBox.top;
}

// Find a line map (mapping character offsets to text nodes) and a
// measurement cache for the given line number. (A line view might
// contain multiple lines when collapsed ranges are present.)
function mapFromLineView(lineView, line, lineN) {
if (lineView.line == line)
{ return {map: lineView.measure.map, cache: lineView.measure.cache} }
for (var i = 0; i < lineView.rest.length; i++)
{ if (lineView.rest[i] == line)
{ return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
{ if (lineNo(lineView.rest[i$1]) > lineN)
{ return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
}






    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};








































// Render a line into the hidden node display.externalMeasured. Used
// when measurement is needed for a line that's not in the viewport.
function updateExternalMeasurement(cm, line) {
line = visualLine(line)
var lineN = lineNo(line)
var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN)
view.lineN = lineN
var built = view.built = buildLineContent(cm, view)
view.text = built.pre
removeChildrenAndAdd(cm.display.lineMeasure, built.pre)
return view
}

// Get a {top, bottom, left, right} box (in line-local coordinates)
// for a given character.
function measureChar(cm, line, ch, bias) {
return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
}

// Find a line view that corresponds to the given line number.
function findViewForLine(cm, lineN) {
if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
{ return cm.display.view[findViewIndex(cm, lineN)] }
var ext = cm.display.externalMeasured
if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
{ return ext }
}

// Measurement can be split in two steps, the set-up work that
// applies to the whole line, and the measurement of the actual
// character. Functions like coordsChar, that need to do a lot of
// measurements in a row, can thus ensure that the set-up work is
// only done once.
function prepareMeasureForLine(cm, line) {
var lineN = lineNo(line)
var view = findViewForLine(cm, lineN)
if (view && !view.text) {
view = null
} else if (view && view.changes) {
updateLineForChanges(cm, view, lineN, getDimensions(cm))
cm.curOp.forceUpdate = true

  }

  }

 
  if (!view)
{ view = updateExternalMeasurement(cm, line) }





  function charCoords(cm, pos, context, lineObj, bias) {
if (!lineObj) lineObj = getLine(cm.doc, pos.line);
return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context);



  var info = mapFromLineView(view, line, lineN)
return {
line: line, view: view, rect: null,
map: info.map, cache: info.cache, before: info.before,
hasHeights: false

  }

  }

 
}





  // Returns a box for a given cursor position, which may have an
// 'other' property containing the position of the secondary cursor
// on a bidi boundary.
function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
lineObj = lineObj || getLine(cm.doc, pos.line);
if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj);
function get(ch, right) {
var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
if (right) m.left = m.right; else m.right = m.left;
return intoCoordSystem(cm, lineObj, m, context);




// Given a prepared measurement object, measures the position of an
// actual character (or fetches it from the cache).
function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
if (prepared.before) { ch = -1 }
var key = ch + (bias || ""), found
if (prepared.cache.hasOwnProperty(key)) {
found = prepared.cache[key]
} else {
if (!prepared.rect)
{ prepared.rect = prepared.view.text.getBoundingClientRect() }
if (!prepared.hasHeights) {
ensureLineHeights(cm, prepared.view, prepared.rect)
prepared.hasHeights = true

    }

    }

    function getBidi(ch, partPos) {
var part = order[partPos], right = part.level % 2;
if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
part = order[--partPos];
ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
right = true;
} else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
part = order[++partPos];
ch = bidiLeft(part) - part.level % 2;
right = false;
}
if (right && ch == part.to && ch > part.from) return get(ch - 1);
return get(ch, right);
}
var order = getOrder(lineObj), ch = pos.ch;
if (!order) return get(ch);
var partPos = getBidiPartAt(order, ch);
var val = getBidi(ch, partPos);
if (bidiOther != null) val.other = getBidi(ch, bidiOther);
return val;

    found = measureCharInner(cm, prepared, ch, bias)
if (!found.bogus) { prepared.cache[key] = found }



















  }

  }

 
  return {left: found.left, right: found.right,
top: varHeight ? found.rtop : found.top,
bottom: varHeight ? found.rbottom : found.bottom}
}





  // Used to cheaply estimate the coordinates for a position. Used for
// intermediate scroll updates.
function estimateCoords(cm, pos) {
var left = 0, pos = clipPos(cm.doc, pos);
if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch;
var lineObj = getLine(cm.doc, pos.line);
var top = heightAtLine(lineObj) + paddingTop(cm.display);
return {left: left, right: left, top: top, bottom: top + lineObj.height};
}

var nullRect = {left: 0, right: 0, top: 0, bottom: 0}













  // Positions returned by coordsChar contain some extra information.
// xRel is the relative x position of the input coordinates compared
// to the found position (so xRel > 0 means the coordinates are to
// the right of the character position, for example). When outside
// is true, that means the coordinates lie outside the line's
// vertical range.
function PosWithInfo(line, ch, outside, xRel) {
var pos = Pos(line, ch);
pos.xRel = xRel;
if (outside) pos.outside = true;
return pos;
























function nodeAndOffsetInLineMap(map, ch, bias) {
var node, start, end, collapse, mStart, mEnd
// First, search the line map for the text node corresponding to,
// or closest to, the target character.
for (var i = 0; i < map.length; i += 3) {
mStart = map[i]
mEnd = map[i + 1]
if (ch < mStart) {
start = 0; end = 1
collapse = "left"
} else if (ch < mEnd) {
start = ch - mStart
end = start + 1
} else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
end = mEnd - mStart
start = end - 1
if (ch >= mEnd) { collapse = "right" }
}
if (start != null) {
node = map[i + 2]
if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
{ collapse = bias }
if (bias == "left" && start == 0)
{ while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
node = map[(i -= 3) + 2]
collapse = "left"
} }
if (bias == "right" && start == mEnd - mStart)
{ while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
node = map[(i += 3) + 2]
collapse = "right"
} }
break
}

  }

  }

 
  return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
}





  // Compute the character position closest to the given coordinates.
// Input must be lineSpace-local ("div" coordinate system).
function coordsChar(cm, x, y) {
var doc = cm.doc;
y += cm.display.viewOffset;
if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
if (lineN > last)
return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1);
if (x < 0) x = 0;

function getUsefulRect(rects, bias) {
var rect = nullRect
if (bias == "left") { for (var i = 0; i < rects.length; i++) {
if ((rect = rects[i]).left != rect.right) { break }
} } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
if ((rect = rects[i$1]).left != rect.right) { break }
} }
return rect
}






    var lineObj = getLine(doc, lineN);
for (;;) {
var found = coordsCharInner(cm, lineObj, lineN, x, y);
var merged = collapsedSpanAtEnd(lineObj);
var mergedPos = merged && merged.find(0, true);
if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
lineN = lineNo(lineObj = mergedPos.to.line);





function measureCharInner(cm, prepared, ch, bias) {
var place = nodeAndOffsetInLineMap(prepared.map, ch, bias)
var node = place.node, start = place.start, end = place.end, collapse = place.collapse

var rect
if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start }
while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end }
if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
{ rect = node.parentNode.getBoundingClientRect() }

      else

      else

        return found;





        { rect = getUsefulRect(range(node, start, end).getClientRects(), bias) }
if (rect.left || rect.right || start == 0) { break }
end = start
start = start - 1
collapse = "right"

    }

    }

 
    if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect) }
} else { // If it is a widget, simply get the box for the whole widget.
if (start > 0) { collapse = bias = "right" }
var rects
if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
{ rect = rects[bias == "right" ? rects.length - 1 : 0] }
else
{ rect = node.getBoundingClientRect() }
}
if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
var rSpan = node.parentNode.getClientRects()[0]
if (rSpan)
{ rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom} }
else
{ rect = nullRect }

  }


  }


  function coordsCharInner(cm, lineObj, lineNo, x, y) {
var innerOff = y - heightAtLine(lineObj);
var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
var preparedMeasure = prepareMeasureForLine(cm, lineObj);









  var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top
var mid = (rtop + rbot) / 2
var heights = prepared.view.measure.heights
var i = 0
for (; i < heights.length - 1; i++)
{ if (mid < heights[i]) { break } }
var top = i ? heights[i - 1] : 0, bot = heights[i]
var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
top: top, bottom: bot}
if (!rect.left && !rect.right) { result.bogus = true }
if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot }





    function getX(ch) {
var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasure);
wrongLine = true;
if (innerOff > sp.bottom) return sp.left - adjust;
else if (innerOff < sp.top) return sp.left + adjust;
else wrongLine = false;
return sp.left;
}

  return result
}











    var bidi = getOrder(lineObj), dist = lineObj.text.length;
var from = lineLeft(lineObj), to = lineRight(lineObj);
var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;









// Work around problem with bounding client rects on ranges being
// returned incorrectly when zoomed on IE10 and below.
function maybeUpdateRectForZooming(measure, rect) {
if (!window.screen || screen.logicalXDPI == null ||
screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
{ return rect }
var scaleX = screen.logicalXDPI / screen.deviceXDPI
var scaleY = screen.logicalYDPI / screen.deviceYDPI
return {left: rect.left * scaleX, right: rect.right * scaleX,
top: rect.top * scaleY, bottom: rect.bottom * scaleY}
}





    if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
// Do a binary search between these bounds.
for (;;) {
if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
var ch = x < fromX || x - fromX <= toX - x ? from : to;
var xDiff = x - (ch == from ? fromX : toX);
while (isExtendingChar(lineObj.text.charAt(ch))) ++ch;
var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside,
xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0);
return pos;
}
var step = Math.ceil(dist / 2), middle = from + step;
if (bidi) {
middle = from;
for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
}
var middleX = getX(middle);
if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;}
else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;}
}

function clearLineMeasurementCacheFor(lineView) {
if (lineView.measure) {
lineView.measure.cache = {}
lineView.measure.heights = null
if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
{ lineView.measure.caches[i] = {} } }















  }

  }

 
}





  var measureText;
// Compute the default text height.
function textHeight(display) {
if (display.cachedTextHeight != null) return display.cachedTextHeight;
if (measureText == null) {
measureText = elt("pre");
// Measure a bunch of lines, for browsers that compute
// fractional heights.
for (var i = 0; i < 49; ++i) {
measureText.appendChild(document.createTextNode("x"));
measureText.appendChild(elt("br"));
}
measureText.appendChild(document.createTextNode("x"));
}
removeChildrenAndAdd(display.measure, measureText);
var height = measureText.offsetHeight / 50;
if (height > 3) display.cachedTextHeight = height;
removeChildren(display.measure);
return height || 1;
}

function clearLineMeasurementCache(cm) {
cm.display.externalMeasure = null
removeChildren(cm.display.lineMeasure)
for (var i = 0; i < cm.display.view.length; i++)
{ clearLineMeasurementCacheFor(cm.display.view[i]) }
}



















  // Compute the default character width.
function charWidth(display) {
if (display.cachedCharWidth != null) return display.cachedCharWidth;
var anchor = elt("span", "xxxxxxxxxx");
var pre = elt("pre", [anchor]);
removeChildrenAndAdd(display.measure, pre);
var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
if (width > 2) display.cachedCharWidth = width;
return width || 10;
}

function clearCaches(cm) {
clearLineMeasurementCache(cm)
cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null
if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true }
cm.display.lineNumChars = null
}









  // OPERATIONS











function pageScrollX() {
// Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
// which causes page_Offset and bounding client rects to use
// different reference viewports and invalidate our calculations.
if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
return window.pageXOffset || (document.documentElement || document.body).scrollLeft
}
function pageScrollY() {
if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
return window.pageYOffset || (document.documentElement || document.body).scrollTop
}





  // Operations are used to wrap a series of changes to the editor
// state in such a way that each change won't have to update the
// cursor and display (which would be awkward, slow, and
// error-prone). Instead, display updates are batched and then all
// combined and executed at once.


function widgetTopHeight(lineObj) {
var height = 0
if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
{ height += widgetHeight(lineObj.widgets[i]) } } }
return height
}





  var operationGroup = null;

var nextOpId = 0;
// Start a new operation.
function startOperation(cm) {
cm.curOp = {
cm: cm,
viewChanged: false, // Flag that indicates that lines might need to be redrawn
startHeight: cm.doc.height, // Used to detect need to update scrollbar
forceUpdate: false, // Used to force a redraw
updateInput: null, // Whether to reset the input textarea
typing: false, // Whether this reset should be careful to leave existing text (for compositing)
changeObjs: null, // Accumulated changes, for firing change events
cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
selectionChanged: false, // Whether the selection needs to be redrawn
updateMaxLine: false, // Set when the widest line needs to be determined anew
scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
scrollToPos: null, // Used to scroll to a specific position
id: ++nextOpId // Unique ID
};
if (operationGroup) {
operationGroup.ops.push(cm.curOp);
} else {
cm.curOp.ownsGroup = operationGroup = {
ops: [cm.curOp],
delayedCallbacks: []
};
}

// Converts a {top, bottom, left, right} box from line-local
// coordinates into another coordinate system. Context may be one of
// "line", "div" (display.lineDiv), "local"./null (editor), "window",
// or "page".
function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
if (!includeWidgets) {
var height = widgetTopHeight(lineObj)
rect.top += height; rect.bottom += height
}
if (context == "line") { return rect }
if (!context) { context = "local" }
var yOff = heightAtLine(lineObj)
if (context == "local") { yOff += paddingTop(cm.display) }
else { yOff -= cm.display.viewOffset }
if (context == "page" || context == "window") {
var lOff = cm.display.lineSpace.getBoundingClientRect()
yOff += lOff.top + (context == "window" ? 0 : pageScrollY())
var xOff = lOff.left + (context == "window" ? 0 : pageScrollX())
rect.left += xOff; rect.right += xOff











  }

  }

 
  rect.top += yOff; rect.bottom += yOff
return rect
}





  function fireCallbacksForOps(group) {
// Calls delayed callbacks and cursorActivity handlers until no
// new ones appear
var callbacks = group.delayedCallbacks, i = 0;
do {
for (; i < callbacks.length; i++)
callbacks[i]();
for (var j = 0; j < group.ops.length; j++) {
var op = group.ops[j];
if (op.cursorActivityHandlers)
while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
op.cursorActivityHandlers[op.cursorActivityCalled++](op.cm);
}
} while (i < callbacks.length);

// Coverts a box from "div" coords to another coordinate system.
// Context may be "window", "page", "div", or "local"./null.
function fromCoordSystem(cm, coords, context) {
if (context == "div") { return coords }
var left = coords.left, top = coords.top
// First move into "page" coordinate system
if (context == "page") {
left -= pageScrollX()
top -= pageScrollY()
} else if (context == "local" || !context) {
var localBox = cm.display.sizer.getBoundingClientRect()
left += localBox.left
top += localBox.top


  }


  }


  // Finish an operation, updating the display and signalling delayed events
function endOperation(cm) {
var op = cm.curOp, group = op.ownsGroup;
if (!group) return;

  var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect()
return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
}






    try { fireCallbacksForOps(group); }
finally {
operationGroup = null;
for (var i = 0; i < group.ops.length; i++)
group.ops[i].cm.curOp = null;
endOperations(group);
}






























function charCoords(cm, pos, context, lineObj, bias) {
if (!lineObj) { lineObj = getLine(cm.doc, pos.line) }
return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
}

// Returns a box for a given cursor position, which may have an
// 'other' property containing the position of the secondary cursor
// on a bidi boundary.
// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
// and after `char - 1` in writing order of `char - 1`
// A cursor Pos(line, char, "after") is on the same visual line as `char`
// and before `char` in writing order of `char`
// Examples (upper-case letters are RTL, lower-case are LTR):
// Pos(0, 1, ...)
// before after
// ab a|b a|b
// aB a|B aB|
// Ab |Ab A|b
// AB B|A B|A
// Every position after the last character on a line is considered to stick
// to the last character on the line.
function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
lineObj = lineObj || getLine(cm.doc, pos.line)
if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
function get(ch, right) {
var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight)
if (right) { m.left = m.right; } else { m.right = m.left }
return intoCoordSystem(cm, lineObj, m, context)
}
var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky
if (ch >= lineObj.text.length) {
ch = lineObj.text.length
sticky = "before"
} else if (ch <= 0) {
ch = 0
sticky = "after"

  }

  }

 
  if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }





  // The DOM updates done when an operation finishes are batched so
// that the minimum number of relayouts are required.
function endOperations(group) {
var ops = group.ops;
for (var i = 0; i < ops.length; i++) // Read DOM
endOperation_R1(ops[i]);
for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
endOperation_W1(ops[i]);
for (var i = 0; i < ops.length; i++) // Read DOM
endOperation_R2(ops[i]);
for (var i = 0; i < ops.length; i++) // Write DOM (maybe)
endOperation_W2(ops[i]);
for (var i = 0; i < ops.length; i++) // Read DOM
endOperation_finish(ops[i]);

  function getBidi(ch, partPos, invert) {
var part = order[partPos], right = part.level == 1
return get(invert ? ch - 1 : ch, right != invert)












  }

  }

 
  var partPos = getBidiPartAt(order, ch, sticky)
var other = bidiOther
var val = getBidi(ch, partPos, sticky == "before")
if (other != null) { val.other = getBidi(ch, other, sticky != "before") }
return val
}





  function endOperation_R1(op) {
var cm = op.cm, display = cm.display;
maybeClipScrollbars(cm);
if (op.updateMaxLine) findMaxLine(cm);







// Used to cheaply estimate the coordinates for a position. Used for
// intermediate scroll updates.
function estimateCoords(cm, pos) {
var left = 0
pos = clipPos(cm.doc, pos)
if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch }
var lineObj = getLine(cm.doc, pos.line)
var top = heightAtLine(lineObj) + paddingTop(cm.display)
return {left: left, right: left, top: top, bottom: top + lineObj.height}
}





    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
op.scrollToPos.to.line >= display.viewTo) ||
display.maxLineChanged && cm.options.lineWrapping;
op.update = op.mustUpdate &&
new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
}






// Positions returned by coordsChar contain some extra information.
// xRel is the relative x position of the input coordinates compared
// to the found position (so xRel > 0 means the coordinates are to
// the right of the character position, for example). When outside
// is true, that means the coordinates lie outside the line's
// vertical range.
function PosWithInfo(line, ch, sticky, outside, xRel) {
var pos = Pos(line, ch, sticky)
pos.xRel = xRel
if (outside) { pos.outside = true }
return pos
}





  function endOperation_W1(op) {
op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);



















// Compute the character position closest to the given coordinates.
// Input must be lineSpace-local ("div" coordinate system).
function coordsChar(cm, x, y) {
var doc = cm.doc
y += cm.display.viewOffset
if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1
if (lineN > last)
{ return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
if (x < 0) { x = 0 }

var lineObj = getLine(doc, lineN)
for (;;) {
var found = coordsCharInner(cm, lineObj, lineN, x, y)
var merged = collapsedSpanAtEnd(lineObj)
var mergedPos = merged && merged.find(0, true)
if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
{ lineN = lineNo(lineObj = mergedPos.to.line) }
else
{ return found }

  }

  }

 
}





  function endOperation_R2(op) {
var cm = op.cm, display = cm.display;
if (op.updatedDisplay) updateHeightsInViewport(cm);





function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
y -= widgetTopHeight(lineObj)
var end = lineObj.text.length
var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0)
end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end)
return {begin: begin, end: end}
}





    op.barMeasure = measureForScrollbars(cm);





function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj) }
var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top
return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
}





    // If the max line changed since it was last measured, measure it,
// and ensure the document's width matches it.
// updateDisplay_W2 will use these properties to do the actual resizing
if (display.maxLineChanged && !cm.options.lineWrapping) {
op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
cm.display.sizerWidth = op.adjustWidthTo;
op.barMeasure.scrollWidth =
Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));

































// Returns true if the given side of a box is after the given
// coordinates, in top-to-bottom, left-to-right order.
function boxIsAfter(box, x, y, left) {
return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
}

function coordsCharInner(cm, lineObj, lineNo, x, y) {
// Move y into line-local coordinate space
y -= heightAtLine(lineObj)
var preparedMeasure = prepareMeasureForLine(cm, lineObj)
// When directly calling `measureCharPrepared`, we have to adjust
// for the widgets at this line.
var widgetHeight = widgetTopHeight(lineObj)
var begin = 0, end = lineObj.text.length, ltr = true

var order = getOrder(lineObj, cm.doc.direction)
// If the line isn't plain left-to-right text, first figure out
// which bidi section the coordinates fall into.
if (order) {
var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
(cm, lineObj, lineNo, preparedMeasure, order, x, y)
ltr = part.level != 1
// The awkward -1 offsets are needed because findFirst (called
// on these below) will treat its first bound as inclusive,
// second as exclusive, but we want to actually address the
// characters in the part's range
begin = ltr ? part.from : part.to - 1
end = ltr ? part.to : part.from - 1
}

// A binary search to find the first character whose bounding box
// starts after the coordinates. If we run across any whose box wrap
// the coordinates, store that.
var chAround = null, boxAround = null
var ch = findFirst(function (ch) {
var box = measureCharPrepared(cm, preparedMeasure, ch)
box.top += widgetHeight; box.bottom += widgetHeight
if (!boxIsAfter(box, x, y, false)) { return false }
if (box.top <= y && box.left <= x) {
chAround = ch
boxAround = box

    }

    }

 
    return true
}, begin, end)





    if (op.updatedDisplay || op.selectionChanged)
op.newSelectionNodes = drawSelection(cm);





















  var baseX, sticky, outside = false
// If a box around the coordinates was found, use that
if (boxAround) {
// Distinguish coordinates nearer to the left or right side of the box
var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr
ch = chAround + (atStart ? 0 : 1)
sticky = atStart ? "after" : "before"
baseX = atLeft ? boxAround.left : boxAround.right
} else {
// (Adjust for extended bound, if necessary.)
if (!ltr && (ch == end || ch == begin)) { ch++ }
// To determine which side to associate with, get the box to the
// left of the character and compare it's vertical position to the
// coordinates
sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
(measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight <= y) == ltr ?
"after" : "before"
// Now get accurate coordinates for this place, in order to get a
// base X position
var coords = cursorCoords(cm, Pos(lineNo, ch, sticky), "line", lineObj, preparedMeasure)
baseX = coords.left
outside = y < coords.top || y >= coords.bottom

  }


  }


  function endOperation_W2(op) {
var cm = op.cm;


  ch = skipExtendingChars(lineObj.text, ch, 1)
return PosWithInfo(lineNo, ch, sticky, outside, x - baseX)
}





    if (op.adjustWidthTo != null) {
cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
if (op.maxScrollLeft < cm.doc.scrollLeft)
setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true);
cm.display.maxLineChanged = false;











































function coordsBidiPart(cm, lineObj, lineNo, preparedMeasure, order, x, y) {
// Bidi parts are sorted left-to-right, and in a non-line-wrapping
// situation, we can take this ordering to correspond to the visual
// ordering. This finds the first part whose end is after the given
// coordinates.
var index = findFirst(function (i) {
var part = order[i], ltr = part.level != 1
return boxIsAfter(cursorCoords(cm, Pos(lineNo, ltr ? part.to : part.from, ltr ? "before" : "after"),
"line", lineObj, preparedMeasure), x, y, true)
}, 0, order.length - 1)
var part = order[index]
// If this isn't the first part, the part's start is also after
// the coordinates, and the coordinates aren't on the same line as
// that start, move one part back.
if (index > 0) {
var ltr = part.level != 1
var start = cursorCoords(cm, Pos(lineNo, ltr ? part.from : part.to, ltr ? "after" : "before"),
"line", lineObj, preparedMeasure)
if (boxIsAfter(start, x, y, true) && start.top > y)
{ part = order[index - 1] }
}
return part
}

function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
// In a wrapped line, rtl text on wrapping boundaries can do things
// that don't correspond to the ordering in our `order` array at
// all, so a binary search doesn't work, and we want to return a
// part that only spans one line so that the binary search in
// coordsCharInner is safe. As such, we first find the extent of the
// wrapped line, and then do a flat search in which we discard any
// spans that aren't on the line.
var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
var begin = ref.begin;
var end = ref.end;
var part = null, closestDist = null
for (var i = 0; i < order.length; i++) {
var p = order[i]
if (p.from >= end || p.to <= begin) { continue }
var ltr = p.level != 1
var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right
// Weigh against spans ending before this, so that they are only
// picked if nothing ends after
var dist = endX < x ? x - endX + 1e9 : endX - x
if (!part || closestDist > dist) {
part = p
closestDist = dist

    }

    }

 
  }
if (!part) { part = order[order.length - 1] }
// Clip the part to the wrapped line.
if (part.from < begin) { part = {from: begin, to: part.to, level: part.level} }
if (part.to > end) { part = {from: part.from, to: end, level: part.level} }
return part
}





    if (op.newSelectionNodes)
showSelection(cm, op.newSelectionNodes);
if (op.updatedDisplay)
setDocumentHeight(cm, op.barMeasure);
if (op.updatedDisplay || op.startHeight != cm.doc.height)
updateScrollbars(cm, op.barMeasure);















var measureText
// Compute the default text height.
function textHeight(display) {
if (display.cachedTextHeight != null) { return display.cachedTextHeight }
if (measureText == null) {
measureText = elt("pre")
// Measure a bunch of lines, for browsers that compute
// fractional heights.
for (var i = 0; i < 49; ++i) {
measureText.appendChild(document.createTextNode("x"))
measureText.appendChild(elt("br"))
}
measureText.appendChild(document.createTextNode("x"))
}
removeChildrenAndAdd(display.measure, measureText)
var height = measureText.offsetHeight / 50
if (height > 3) { display.cachedTextHeight = height }
removeChildren(display.measure)
return height || 1
}





    if (op.selectionChanged) restartBlink(cm);










// Compute the default character width.
function charWidth(display) {
if (display.cachedCharWidth != null) { return display.cachedCharWidth }
var anchor = elt("span", "xxxxxxxxxx")
var pre = elt("pre", [anchor])
removeChildrenAndAdd(display.measure, pre)
var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10
if (width > 2) { display.cachedCharWidth = width }
return width || 10
}





    if (cm.state.focused && op.updateInput)
resetInput(cm, op.typing);







// Do a bulk-read of the DOM positions and sizes needed to draw the
// view, so that we don't interleave reading and writing to the DOM.
function getDimensions(cm) {
var d = cm.display, left = {}, width = {}
var gutterLeft = d.gutters.clientLeft
for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft
width[cm.options.gutters[i]] = n.clientWidth

  }

  }

 
  return {fixedPos: compensateForHScroll(d),
gutterTotalWidth: d.gutters.offsetWidth,
gutterLeft: left,
gutterWidth: width,
wrapperWidth: d.wrapper.clientWidth}
}





  function endOperation_finish(op) {
var cm = op.cm, display = cm.display, doc = cm.doc;





// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
// but using getBoundingClientRect to get a sub-pixel-accurate
// result.
function compensateForHScroll(display) {
return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
}





    if (op.updatedDisplay) postUpdateDisplay(cm, op.update);








// Returns a function that estimates the height of a line, to use as
// first approximation until the line becomes visible (and is thus
// properly measurable).
function estimateHeight(cm) {
var th = textHeight(cm.display), wrapping = cm.options.lineWrapping
var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3)
return function (line) {
if (lineIsHidden(cm.doc, line)) { return 0 }





    // Abort mouse wheel delta measurement, when scrolling explicitly
if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
display.wheelStartX = display.wheelStartY = null;


    var widgetsHeight = 0
if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height }
} }





    // Propagate the scroll position to the actual DOM scroller
if (op.scrollTop != null && (display.scroller.scrollTop != op.scrollTop || op.forceScroll)) {
doc.scrollTop = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop));
display.scrollbars.setScrollTop(doc.scrollTop);
display.scroller.scrollTop = doc.scrollTop;
}
if (op.scrollLeft != null && (display.scroller.scrollLeft != op.scrollLeft || op.forceScroll)) {
doc.scrollLeft = Math.max(0, Math.min(display.scroller.scrollWidth - displayWidth(cm), op.scrollLeft));
display.scrollbars.setScrollLeft(doc.scrollLeft);
display.scroller.scrollLeft = doc.scrollLeft;
alignHorizontally(cm);
}
// If we need to scroll a specific position into view, do so.
if (op.scrollToPos) {
var coords = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords);
}

    if (wrapping)
{ return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
else
{ return widgetsHeight + th }
}
}

















    // Fire events for markers that are hidden/unidden by editing or
// undoing
var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
if (hidden) for (var i = 0; i < hidden.length; ++i)
if (!hidden[i].lines.length) signal(hidden[i], "hide");
if (unhidden) for (var i = 0; i < unhidden.length; ++i)
if (unhidden[i].lines.length) signal(unhidden[i], "unhide");

function estimateLineHeights(cm) {
var doc = cm.doc, est = estimateHeight(cm)
doc.iter(function (line) {
var estHeight = est(line)
if (estHeight != line.height) { updateLineHeight(line, estHeight) }
})
}





    if (display.wrapper.offsetHeight)
doc.scrollTop = cm.display.scroller.scrollTop;







// Given a mouse event, find the corresponding position. If liberal
// is false, it checks whether a gutter or scrollbar was clicked,
// and returns null if it was. forRect is used by rectangular
// selections, and tries to estimate a character position even for
// coordinates beyond the right of the text.
function posFromMouse(cm, e, liberal, forRect) {
var display = cm.display
if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }





    // Fire change events, and delayed event handlers
if (op.changeObjs)
signal(cm, "changes", cm, op.changeObjs);






  var x, y, space = display.lineSpace.getBoundingClientRect()
// Fails unpredictably on IE[67] when mouse is dragged around quickly.
try { x = e.clientX - space.left; y = e.clientY - space.top }
catch (e) { return null }
var coords = coordsChar(cm, x, y), line
if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length
coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff))

  }

  }

 
  return coords
}





  // Run the given function in an operation
function runInOp(cm, f) {
if (cm.curOp) return f();
startOperation(cm);
try { return f(); }
finally { endOperation(cm); }
}
// Wraps a function in an operation. Returns the wrapped function.
function operation(cm, f) {
return function() {
if (cm.curOp) return f.apply(cm, arguments);
startOperation(cm);
try { return f.apply(cm, arguments); }
finally { endOperation(cm); }
};
}
// Used to add methods to editor and doc instances, wrapping them in
// operations.
function methodOp(f) {
return function() {
if (this.curOp) return f.apply(this, arguments);
startOperation(this);
try { return f.apply(this, arguments); }
finally { endOperation(this); }
};
}
function docMethodOp(f) {
return function() {
var cm = this.cm;
if (!cm || cm.curOp) return f.apply(this, arguments);
startOperation(cm);
try { return f.apply(this, arguments); }
finally { endOperation(cm); }
};

// Find the view element corresponding to a given line. Return null
// when the line isn't visible.
function findViewIndex(cm, n) {
if (n >= cm.display.viewTo) { return null }
n -= cm.display.viewFrom
if (n < 0) { return null }
var view = cm.display.view
for (var i = 0; i < view.length; i++) {
n -= view[i].size
if (n < 0) { return i }

























  }

  }

 
}





  // VIEW TRACKING



function updateSelection(cm) {
cm.display.input.showSelection(cm.display.input.prepareSelection())
}





  // These objects are used to represent the visible (currently drawn)
// part of the document. A LineView may correspond to multiple
// logical lines, if those are connected by collapsed ranges.
function LineView(doc, line, lineN) {
// The starting line
this.line = line;
// Continuing lines, if any
this.rest = visualLineContinued(line);
// Number of logical lines in this visual line
this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
this.node = this.text = null;
this.hidden = lineIsHidden(doc, line);





function prepareSelection(cm, primary) {
if ( primary === void 0 ) primary = true;

var doc = cm.doc, result = {}
var curFragment = result.cursors = document.createDocumentFragment()
var selFragment = result.selection = document.createDocumentFragment()

for (var i = 0; i < doc.sel.ranges.length; i++) {
if (!primary && i == doc.sel.primIndex) { continue }
var range = doc.sel.ranges[i]
if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
var collapsed = range.empty()
if (collapsed || cm.options.showCursorWhenSelecting)
{ drawSelectionCursor(cm, range.head, curFragment) }
if (!collapsed)
{ drawSelectionRange(cm, range, selFragment) }

  }

  }

 
  return result
}





  // Create a range of LineView objects for the given lines.
function buildViewArray(cm, from, to) {
var array = [], nextPos;
for (var pos = from; pos < to; pos = nextPos) {
var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
nextPos = pos + view.size;
array.push(view);
}
return array;








// Draws a cursor for the given range
function drawSelectionCursor(cm, head, output) {
var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine)

var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"))
cursor.style.left = pos.left + "px"
cursor.style.top = pos.top + "px"
cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"

if (pos.other) {
// Secondary cursor, shown when on a 'jump' in bi-directional text
var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"))
otherCursor.style.display = ""
otherCursor.style.left = pos.other.left + "px"
otherCursor.style.top = pos.other.top + "px"
otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"

  }

  }

 
}





  // Updates the display.view data structure for a given change to the
// document. From and to are in pre-change coordinates. Lendiff is
// the amount of lines added or subtracted by the change. This is
// used for changes that span multiple lines, or change the way
// lines are divided into visual lines. regLineChange (below)
// registers single-line changes.
function regChange(cm, from, to, lendiff) {
if (from == null) from = cm.doc.first;
if (to == null) to = cm.doc.first + cm.doc.size;
if (!lendiff) lendiff = 0;

function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }














    var display = cm.display;
if (lendiff && to < display.viewTo &&
(display.updateLineNumbers == null || display.updateLineNumbers > from))
display.updateLineNumbers = from;



// Draws the given range as a highlighted selection
function drawSelectionRange(cm, range, output) {
var display = cm.display, doc = cm.doc
var fragment = document.createDocumentFragment()
var padding = paddingH(cm.display), leftSide = padding.left
var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right





    cm.curOp.viewChanged = true;






  function add(left, top, width, bottom) {
if (top < 0) { top = 0 }
top = Math.round(top)
bottom = Math.round(bottom)
fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n height: " + (bottom - top) + "px")))
}





    if (from >= display.viewTo) { // Change after
if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
resetView(cm);
} else if (to <= display.viewFrom) { // Change before
if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
resetView(cm);
} else {
display.viewFrom += lendiff;
display.viewTo += lendiff;




































  function drawForLine(line, fromArg, toArg) {
var lineObj = getLine(doc, line)
var lineLen = lineObj.text.length
var start, end
function coords(ch, bias) {
return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
}

var order = getOrder(lineObj, doc.direction)
iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
var fromPos = coords(from, dir == "ltr" ? "left" : "right")
var toPos = coords(to - 1, dir == "ltr" ? "right" : "left")
if (dir == "ltr") {
var fromLeft = fromArg == null && from == 0 ? leftSide : fromPos.left
var toRight = toArg == null && to == lineLen ? rightSide : toPos.right
if (toPos.top - fromPos.top <= 3) { // Single line
add(fromLeft, toPos.top, toRight - fromLeft, toPos.bottom)
} else { // Multiple lines
add(fromLeft, fromPos.top, null, fromPos.bottom)
if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top) }
add(leftSide, toPos.top, toPos.right, toPos.bottom)
}
} else if (from < to) { // RTL
var fromRight = fromArg == null && from == 0 ? rightSide : fromPos.right
var toLeft = toArg == null && to == lineLen ? leftSide : toPos.left
if (toPos.top - fromPos.top <= 3) { // Single line
add(toLeft, toPos.top, fromRight - toLeft, toPos.bottom)
} else { // Multiple lines
var topLeft = leftSide
if (i) {
var topEnd = wrappedLineExtentChar(cm, lineObj, null, from).end
// The coordinates returned for an RTL wrapped space tend to
// be complete bogus, so try to skip that here.
topLeft = coords(topEnd - (/\s/.test(lineObj.text.charAt(topEnd - 1)) ? 2 : 1), "left").left
}
add(topLeft, fromPos.top, fromRight - topLeft, fromPos.bottom)
if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top) }
var botWidth = null
if (i < order.length - 1 || true) {
var botStart = wrappedLineExtentChar(cm, lineObj, null, to).begin
botWidth = coords(botStart, "right").right - toLeft
}
add(toLeft, toPos.top, botWidth, toPos.bottom)
}

      }

      }

    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
resetView(cm);
} else if (from <= display.viewFrom) { // Top overlap
var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
if (cut) {
display.view = display.view.slice(cut.index);
display.viewFrom = cut.lineN;
display.viewTo += lendiff;















if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos }
if (cmpCoords(toPos, start) < 0) { start = toPos }
if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos }
if (cmpCoords(toPos, end) < 0) { end = toPos }
})
return {start: start, end: end}
}

var sFrom = range.from(), sTo = range.to()
if (sFrom.line == sTo.line) {
drawForLine(sFrom.line, sFrom.ch, sTo.ch)
} else {
var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line)
var singleVLine = visualLine(fromLine) == visualLine(toLine)
var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end
var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start
if (singleVLine) {
if (leftEnd.top < rightStart.top - 2) {
add(leftEnd.right, leftEnd.top, null, leftEnd.bottom)
add(leftSide, rightStart.top, rightStart.left, rightStart.bottom)

      } else {

      } else {

        resetView(cm);

        add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom)

      }

      }

    } else if (to >= display.viewTo) { // Bottom overlap
var cut = viewCuttingPoint(cm, from, from, -1);
if (cut) {
display.view = display.view.slice(0, cut.index);
display.viewTo = cut.lineN;
} else {
resetView(cm);
}
} else { // Gap in the middle
var cutTop = viewCuttingPoint(cm, from, from, -1);
var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
if (cutTop && cutBot) {
display.view = display.view.slice(0, cutTop.index)
.concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
.concat(display.view.slice(cutBot.index));
display.viewTo += lendiff;
} else {
resetView(cm);
}
}

var ext = display.externalMeasured;
if (ext) {
if (to < ext.lineN)
ext.lineN += lendiff;
else if (from < ext.lineN + ext.size)
display.externalMeasured = null;

 
    }

    }

 
    if (leftEnd.bottom < rightStart.top)
{ add(leftSide, leftEnd.bottom, null, rightStart.top) }

  }


  }


  // Register a change to a single line. Type must be one of "text",
// "gutter", "class", "widget"
function regLineChange(cm, line, type) {
cm.curOp.viewChanged = true;
var display = cm.display, ext = cm.display.externalMeasured;
if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
display.externalMeasured = null;

  output.appendChild(fragment)
}










    if (line < display.viewFrom || line >= display.viewTo) return;
var lineView = display.view[findViewIndex(cm, line)];
if (lineView.node == null) return;
var arr = lineView.changes || (lineView.changes = []);
if (indexOf(arr, type) == -1) arr.push(type);
}








// Cursor-blinking
function restartBlink(cm) {
if (!cm.state.focused) { return }
var display = cm.display
clearInterval(display.blinker)
var on = true
display.cursorDiv.style.visibility = ""
if (cm.options.cursorBlinkRate > 0)
{ display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
cm.options.cursorBlinkRate) }
else if (cm.options.cursorBlinkRate < 0)
{ display.cursorDiv.style.visibility = "hidden" }
}





  // Clear the view.
function resetView(cm) {
cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
cm.display.view = [];
cm.display.viewOffset = 0;
}









function ensureFocus(cm) {
if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm) }
}

function delayBlurEvent(cm) {
cm.state.delayingBlurEvent = true
setTimeout(function () { if (cm.state.delayingBlurEvent) {
cm.state.delayingBlurEvent = false
onBlur(cm)
} }, 100)
}

function onFocus(cm, e) {
if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false }





  // Find the view element corresponding to a given line. Return null
// when the line isn't visible.
function findViewIndex(cm, n) {
if (n >= cm.display.viewTo) return null;
n -= cm.display.viewFrom;
if (n < 0) return null;
var view = cm.display.view;
for (var i = 0; i < view.length; i++) {
n -= view[i].size;
if (n < 0) return i;


  if (cm.options.readOnly == "nocursor") { return }
if (!cm.state.focused) {
signal(cm, "focus", cm, e)
cm.state.focused = true
addClass(cm.display.wrapper, "CodeMirror-focused")
// This test prevents this from firing when a context
// menu is closed (since the input reset would kill the
// select-all detection hack)
if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
cm.display.input.reset()
if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20) } // Issue #1730

    }

    }

 
    cm.display.input.receivedFocus()

  }

  }

 
  restartBlink(cm)
}
function onBlur(cm, e) {
if (cm.state.delayingBlurEvent) { return }





  function viewCuttingPoint(cm, oldN, newN, dir) {
var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
return {index: index, lineN: newN};
for (var i = 0, n = cm.display.viewFrom; i < index; i++)
n += view[i].size;
if (n != oldN) {
if (dir > 0) {
if (index == view.length - 1) return null;
diff = (n + view[index].size) - oldN;
index++;
} else {
diff = n - oldN;
}
oldN += diff; newN += diff;










  if (cm.state.focused) {
signal(cm, "blur", cm, e)
cm.state.focused = false
rmClass(cm.display.wrapper, "CodeMirror-focused")
}
clearInterval(cm.display.blinker)
setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false } }, 150)
}

// Read the actual heights of the rendered lines, and update their
// stored heights to match.
function updateHeightsInViewport(cm) {
var display = cm.display
var prevBottom = display.lineDiv.offsetTop
for (var i = 0; i < display.view.length; i++) {
var cur = display.view[i], height = (void 0)
if (cur.hidden) { continue }
if (ie && ie_version < 8) {
var bot = cur.node.offsetTop + cur.node.offsetHeight
height = bot - prevBottom
prevBottom = bot
} else {
var box = cur.node.getBoundingClientRect()
height = box.bottom - box.top

    }

    }

    while (visualLineNo(cm.doc, newN) != newN) {
if (index == (dir < 0 ? 0 : view.length - 1)) return null;
newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
index += dir;




    var diff = cur.line.height - height
if (height < 2) { height = textHeight(display) }
if (diff > .005 || diff < -.005) {
updateLineHeight(cur.line, height)
updateWidgetHeight(cur.line)
if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
{ updateWidgetHeight(cur.rest[j]) } }

    }

    }

    return {index: index, lineN: newN};

 
  }

  }

 
}





  // Force the view to cover a given range, adding empty view element
// or clipping off existing ones as needed.
function adjustView(cm, from, to) {
var display = cm.display, view = display.view;
if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
display.view = buildViewArray(cm, from, to);
display.viewFrom = from;
} else {
if (display.viewFrom > from)
display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view);
else if (display.viewFrom < from)
display.view = display.view.slice(findViewIndex(cm, from));
display.viewFrom = from;
if (display.viewTo < to)
display.view = display.view.concat(buildViewArray(cm, display.viewTo, to));
else if (display.viewTo > to)
display.view = display.view.slice(0, findViewIndex(cm, to));










// Read and store the height of line widgets associated with the
// given line.
function updateWidgetHeight(line) {
if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i)
{ line.widgets[i].height = line.widgets[i].node.parentNode.offsetHeight } }
}

// Compute the lines that are visible in a given viewport (defaults
// the the current scroll position). viewport may contain top,
// height, and ensure (see op.scrollToPos) properties.
function visibleLines(display, doc, viewport) {
var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop
top = Math.floor(top - paddingTop(display))
var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight

var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom)
// Ensure is a {from: {line, ch}, to: {line, ch}} object, and
// forces those lines into the viewport (if possible).
if (viewport && viewport.ensure) {
var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line
if (ensureFrom < from) {
from = ensureFrom
to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)
} else if (Math.min(ensureTo, doc.lastLine()) >= to) {
from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight)
to = ensureTo

    }

    }

    display.viewTo = to;

 
  }

  }

 
  return {from: from, to: Math.max(to, from + 1)}
}





  // Count the number of lines in the view whose DOM representation is
// out of date (or nonexistent).
function countDirtyView(cm) {
var view = cm.display.view, dirty = 0;
for (var i = 0; i < view.length; i++) {
var lineView = view[i];
if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty;







// Re-align line numbers and gutter marks to compensate for
// horizontal scrolling.
function alignHorizontally(cm) {
var display = cm.display, view = display.view
if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft
var gutterW = display.gutters.offsetWidth, left = comp + "px"
for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
if (cm.options.fixedGutter) {
if (view[i].gutter)
{ view[i].gutter.style.left = left }
if (view[i].gutterBackground)
{ view[i].gutterBackground.style.left = left }

    }

    }

    return dirty;

























    var align = view[i].alignable
if (align) { for (var j = 0; j < align.length; j++)
{ align[j].style.left = left } }
} }
if (cm.options.fixedGutter)
{ display.gutters.style.left = (comp + gutterW) + "px" }
}

// Used to ensure that the line number gutter is still the right
// size for the current document size. Returns true when an update
// is needed.
function maybeUpdateLineNumberWidth(cm) {
if (!cm.options.lineNumbers) { return false }
var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display
if (last.length != display.lineNumChars) {
var test = display.measure.appendChild(elt("div", [elt("div", last)],
"CodeMirror-linenumber CodeMirror-gutter-elt"))
var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW
display.lineGutter.style.width = ""
display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1
display.lineNumWidth = display.lineNumInnerWidth + padding
display.lineNumChars = display.lineNumInnerWidth ? last.length : -1
display.lineGutter.style.width = display.lineNumWidth + "px"
updateGutterSpace(cm)
return true

  }

  }

 
  return false
}





  // INPUT HANDLING

// SCROLLING THINGS INTO VIEW





  // Poll for input changes, using the normal rate of polling. This
// runs as long as the editor is focused.
function slowPoll(cm) {
if (cm.display.pollingFast) return;
cm.display.poll.set(cm.options.pollInterval, function() {
readInput(cm);
if (cm.state.focused) slowPoll(cm);
});






// If an editor sits on the top or bottom of the window, partially
// scrolled out of view, this ensures that the cursor is visible.
function maybeScrollWindow(cm, rect) {
if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }

var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null
if (rect.top + box.top < 0) { doScroll = true }
else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false }
if (doScroll != null && !phantom) {
var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"))
cm.display.lineSpace.appendChild(scrollNode)
scrollNode.scrollIntoView(doScroll)
cm.display.lineSpace.removeChild(scrollNode)

  }

  }

 
}





  // When an event has just come in that is likely to add or change
// something in the input textarea, we poll faster, to ensure that
// the change appears on the screen quickly.
function fastPoll(cm) {
var missed = false;
cm.display.pollingFast = true;
function p() {
var changed = readInput(cm);
if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);}
else {cm.display.pollingFast = false; slowPoll(cm);}

















// Scroll a given position into view (immediately), verifying that
// it actually became visible (as line heights are accurately
// measured, the position of something may 'drift' during drawing).
function scrollPosIntoView(cm, pos, end, margin) {
if (margin == null) { margin = 0 }
var rect
if (!cm.options.lineWrapping && pos == end) {
// Set pos and end to the cursor positions around the character pos sticks to
// If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
// If pos == Pos(_, 0, "before"), pos and end are unchanged
pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos
end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos
}
for (var limit = 0; limit < 5; limit++) {
var changed = false
var coords = cursorCoords(cm, pos)
var endCoords = !end || end == pos ? coords : cursorCoords(cm, end)
rect = {left: Math.min(coords.left, endCoords.left),
top: Math.min(coords.top, endCoords.top) - margin,
right: Math.max(coords.left, endCoords.left),
bottom: Math.max(coords.bottom, endCoords.bottom) + margin}
var scrollPos = calculateScrollPos(cm, rect)
var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft
if (scrollPos.scrollTop != null) {
updateScrollTop(cm, scrollPos.scrollTop)
if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true }

    }

    }

    cm.display.poll.set(20, p);





    if (scrollPos.scrollLeft != null) {
setScrollLeft(cm, scrollPos.scrollLeft)
if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true }
}
if (!changed) { break }

  }

  }

 
  return rect
}





  // This will be set to an array of strings when copying, so that,
// when pasting, we know what kind of selections the copied text
// was made out of.
var lastCopied = null;



// Scroll a given set of coordinates into view (immediately).
function scrollIntoView(cm, rect) {
var scrollPos = calculateScrollPos(cm, rect)
if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop) }
if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft) }
}





  // Read input from the textarea, and update the document to match.
// When something is selected, it is present in the textarea, and
// selected (unless it is huge, in which case a placeholder is
// used). When nothing is selected, the cursor sits after previously
// seen text (can be empty), which is stored in prevInput (we must
// not reset the textarea when typing, because that breaks IME).
function readInput(cm) {
var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc;
// Since this is called a *lot*, try to bail out as cheaply as
// possible when it is clear that nothing happened. hasSelection
// will be the case when there is a lot of text in the textarea,
// in which case reading its value would be expensive.
if (!cm.state.focused || (hasSelection(input) && !prevInput) || isReadOnly(cm) || cm.options.disableInput || cm.state.keySeq)
return false;
// See paste handler for more on the fakedLastChar kludge
if (cm.state.pasteIncoming && cm.state.fakedLastChar) {
input.value = input.value.substring(0, input.value.length - 1);
cm.state.fakedLastChar = false;
}
var text = input.value;
// If nothing changed, bail.
if (text == prevInput && !cm.somethingSelected()) return false;
// Work around nonsensical selection resetting in IE9/10, and
// inexplicable appearance of private area unicode characters on
// some key combos in Mac (#2689).
if (ie && ie_version >= 9 && cm.display.inputHasSelection === text ||
mac && /[\uf700-\uf7ff]/.test(text)) {
resetInput(cm);
return false;
}

// Calculate a new scroll position needed to scroll the given
// rectangle into view. Returns an object with scrollTop and
// scrollLeft properties. When these are undefined, the
// vertical/horizontal position does not need to be adjusted.
function calculateScrollPos(cm, rect) {
var display = cm.display, snapMargin = textHeight(cm.display)
if (rect.top < 0) { rect.top = 0 }
var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop
var screen = displayHeight(cm), result = {}
if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen }
var docBottom = cm.doc.height + paddingVert(display)
var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin
if (rect.top < screentop) {
result.scrollTop = atTop ? 0 : rect.top
} else if (rect.bottom > screentop + screen) {
var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen)
if (newTop != screentop) { result.scrollTop = newTop }
}

















    var withOp = !cm.curOp;
if (withOp) startOperation(cm);
cm.display.shift = false;










  var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft
var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0)
var tooWide = rect.right - rect.left > screenw
if (tooWide) { rect.right = rect.left + screenw }
if (rect.left < 10)
{ result.scrollLeft = 0 }
else if (rect.left < screenleft)
{ result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)) }
else if (rect.right > screenw + screenleft - 3)
{ result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw }
return result
}





    if (text.charCodeAt(0) == 0x200b && doc.sel == cm.display.selForContextMenu && !prevInput)
prevInput = "\u200b";
// Find the part of the input that is actually new
var same = 0, l = Math.min(prevInput.length, text.length);
while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same;
var inserted = text.slice(same), textLines = splitLines(inserted);


// Store a relative adjustment to the scroll position in the current
// operation (to be applied when the operation finishes).
function addToScrollTop(cm, top) {
if (top == null) { return }
resolveScrollToPos(cm)
cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top
}





    // When pasing N lines into N selections, insert one line per selection
var multiPaste = null;
if (cm.state.pasteIncoming && doc.sel.ranges.length > 1) {
if (lastCopied && lastCopied.join("\n") == inserted)
multiPaste = doc.sel.ranges.length % lastCopied.length == 0 && map(lastCopied, splitLines);
else if (textLines.length == doc.sel.ranges.length)
multiPaste = map(textLines, function(l) { return [l]; });
}

// Make sure that at the end of the operation the current cursor is
// shown.
function ensureCursorVisible(cm) {
resolveScrollToPos(cm)
var cur = cm.getCursor()
cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin}
}






    // Normal behavior is to insert the new text into every selection
for (var i = doc.sel.ranges.length - 1; i >= 0; i--) {
var range = doc.sel.ranges[i];
var from = range.from(), to = range.to();
// Handle deletion
if (same < prevInput.length)
from = Pos(from.line, from.ch - (prevInput.length - same));
// Handle overwrite
else if (cm.state.overwrite && range.empty() && !cm.state.pasteIncoming)
to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length));
var updateInput = cm.curOp.updateInput;
var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i % multiPaste.length] : textLines,
origin: cm.state.pasteIncoming ? "paste" : cm.state.cutIncoming ? "cut" : "+input"};
makeChange(cm.doc, changeEvent);
signalLater(cm, "inputRead", cm, changeEvent);
// When an 'electric' character is inserted, immediately trigger a reindent
if (inserted && !cm.state.pasteIncoming && cm.options.electricChars &&
cm.options.smartIndent && range.head.ch < 100 &&
(!i || doc.sel.ranges[i - 1].head.line != range.head.line)) {
var mode = cm.getModeAt(range.head);
var end = changeEnd(changeEvent);
if (mode.electricChars) {
for (var j = 0; j < mode.electricChars.length; j++)
if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
indentLine(cm, end.line, "smart");
break;
}
} else if (mode.electricInput) {
if (mode.electricInput.test(getLine(doc, end.line).text.slice(0, end.ch)))
indentLine(cm, end.line, "smart");
}
}
}
ensureCursorVisible(cm);
cm.curOp.updateInput = updateInput;
cm.curOp.typing = true;

function scrollToCoords(cm, x, y) {
if (x != null || y != null) { resolveScrollToPos(cm) }
if (x != null) { cm.curOp.scrollLeft = x }
if (y != null) { cm.curOp.scrollTop = y }
}

function scrollToRange(cm, range) {
resolveScrollToPos(cm)
cm.curOp.scrollToPos = range
}































    // Don't leave long text in the textarea, since it makes further polling slow
if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.prevInput = "";
else cm.display.prevInput = text;
if (withOp) endOperation(cm);
cm.state.pasteIncoming = cm.state.cutIncoming = false;
return true;





// When an operation has its scrollToPos property set, and another
// scroll action is applied before the end of the operation, this
// 'simulates' scrolling that position into view in a cheap way, so
// that the effect of intermediate scroll commands is not ignored.
function resolveScrollToPos(cm) {
var range = cm.curOp.scrollToPos
if (range) {
cm.curOp.scrollToPos = null
var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to)
scrollToCoordsRange(cm, from, to, range.margin)

  }

  }

 
}





  // Reset the input to correspond to the selection (or to be empty,
// when not typing and nothing is selected)
function resetInput(cm, typing) {
if (cm.display.contextMenuPending) return;
var minimal, selected, doc = cm.doc;
if (cm.somethingSelected()) {
cm.display.prevInput = "";
var range = doc.sel.primary();
minimal = hasCopyEvent &&
(range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000);
var content = minimal ? "-" : selected || cm.getSelection();
cm.display.input.value = content;
if (cm.state.focused) selectInput(cm.display.input);
if (ie && ie_version >= 9) cm.display.inputHasSelection = content;
} else if (!typing) {
cm.display.prevInput = cm.display.input.value = "";
if (ie && ie_version >= 9) cm.display.inputHasSelection = null;
}
cm.display.inaccurateSelection = minimal;






































function scrollToCoordsRange(cm, from, to, margin) {
var sPos = calculateScrollPos(cm, {
left: Math.min(from.left, to.left),
top: Math.min(from.top, to.top) - margin,
right: Math.max(from.right, to.right),
bottom: Math.max(from.bottom, to.bottom) + margin
})
scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop)
}

// Sync the scrollable area and scrollbars, ensure the viewport
// covers the visible area.
function updateScrollTop(cm, val) {
if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
if (!gecko) { updateDisplaySimple(cm, {top: val}) }
setScrollTop(cm, val, true)
if (gecko) { updateDisplaySimple(cm) }
startWorker(cm, 100)
}

function setScrollTop(cm, val, forceScroll) {
val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val)
if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
cm.doc.scrollTop = val
cm.display.scrollbars.setScrollTop(val)
if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val }
}

// Sync scroller and scrollbar, ensure the gutter elements are
// aligned.
function setScrollLeft(cm, val, isScroller, forceScroll) {
val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth)
if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
cm.doc.scrollLeft = val
alignHorizontally(cm)
if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val }
cm.display.scrollbars.setScrollLeft(val)
}

// SCROLLBARS

// Prepare DOM reads needed to update the scrollbars. Done in one
// shot to minimize update/measure roundtrips.
function measureForScrollbars(cm) {
var d = cm.display, gutterW = d.gutters.offsetWidth
var docH = Math.round(cm.doc.height + paddingVert(cm.display))
return {
clientHeight: d.scroller.clientHeight,
viewHeight: d.wrapper.clientHeight,
scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
viewWidth: d.wrapper.clientWidth,
barLeft: cm.options.fixedGutter ? gutterW : 0,
docHeight: docH,
scrollHeight: docH + scrollGap(cm) + d.barHeight,
nativeBarWidth: d.nativeBarWidth,
gutterWidth: gutterW

  }

  }

 
}

var NativeScrollbars = function(place, scroll, cm) {
this.cm = cm
var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar")
var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar")
place(vert); place(horiz)

on(vert, "scroll", function () {
if (vert.clientHeight) { scroll(vert.scrollTop, "vertical") }
})
on(horiz, "scroll", function () {
if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal") }
})

this.checkedZeroWidth = false
// Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px" }
};

NativeScrollbars.prototype.update = function (measure) {
var needsH = measure.scrollWidth > measure.clientWidth + 1
var needsV = measure.scrollHeight > measure.clientHeight + 1
var sWidth = measure.nativeBarWidth





  function focusInput(cm) {
if (cm.options.readOnly != "nocursor" && (!mobile || activeElt() != cm.display.input))
cm.display.input.focus();








  if (needsV) {
this.vert.style.display = "block"
this.vert.style.bottom = needsH ? sWidth + "px" : "0"
var totalHeight = measure.viewHeight - (needsH ? sWidth : 0)
// A bug in IE8 can cause this value to be negative, so guard it.
this.vert.firstChild.style.height =
Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px"
} else {
this.vert.style.display = ""
this.vert.firstChild.style.height = "0"

  }


  }


  function ensureFocus(cm) {
if (!cm.state.focused) { focusInput(cm); onFocus(cm); }









  if (needsH) {
this.horiz.style.display = "block"
this.horiz.style.right = needsV ? sWidth + "px" : "0"
this.horiz.style.left = measure.barLeft + "px"
var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0)
this.horiz.firstChild.style.width =
Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px"
} else {
this.horiz.style.display = ""
this.horiz.firstChild.style.width = "0"

  }


  }


  function isReadOnly(cm) {
return cm.options.readOnly || cm.doc.cantEdit;


  if (!this.checkedZeroWidth && measure.clientHeight > 0) {
if (sWidth == 0) { this.zeroWidthHack() }
this.checkedZeroWidth = true

  }


  }


  // EVENT HANDLERS


  return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
};





  // Attach the necessary event handlers when initializing the editor
function registerEventHandlers(cm) {
var d = cm.display;
on(d.scroller, "mousedown", operation(cm, onMouseDown));
// Older IE's will not fire a second mousedown for a double click
if (ie && ie_version < 11)
on(d.scroller, "dblclick", operation(cm, function(e) {
if (signalDOMEvent(cm, e)) return;
var pos = posFromMouse(cm, e);
if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return;
e_preventDefault(e);
var word = cm.findWordAt(pos);
extendSelection(cm.doc, word.anchor, word.head);
}));
else
on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); });
// Prevent normal selection in the editor (we handle our own)
on(d.lineSpace, "selectstart", function(e) {
if (!eventInWidget(d, e)) e_preventDefault(e);
});
// Some browsers fire contextmenu *after* opening the menu, at
// which point we can't mess with it anymore. Context menu is
// handled in onMouseDown for these browsers.
if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});

NativeScrollbars.prototype.setScrollLeft = function (pos) {
if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos }
if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz") }
};

























    // Sync scrolling between fake scrollbars and real scrollable
// area, ensure viewport is updated when scrolling.
on(d.scroller, "scroll", function() {
if (d.scroller.clientHeight) {
setScrollTop(cm, d.scroller.scrollTop);
setScrollLeft(cm, d.scroller.scrollLeft, true);
signal(cm, "scroll", cm);
}
});

NativeScrollbars.prototype.setScrollTop = function (pos) {
if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos }
if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert") }
};










    // Listen to wheel events in order to try and update the viewport on time.
on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});





NativeScrollbars.prototype.zeroWidthHack = function () {
var w = mac && !mac_geMountainLion ? "12px" : "18px"
this.horiz.style.height = this.vert.style.width = w
this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none"
this.disableHoriz = new Delayed
this.disableVert = new Delayed
};





    // Prevent wrapper from ever scrolling
on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
















NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
bar.style.pointerEvents = "auto"
function maybeDisable() {
// To find out whether the scrollbar is still visible, we
// check whether the element under the pixel in the bottom
// right corner of the scrollbar box is the scrollbar box
// itself (when the bar is still visible) or its filler child
// (when the bar is hidden). If it is still visible, we keep
// it enabled, if it's hidden, we disable pointer events.
var box = bar.getBoundingClientRect()
var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
: document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1)
if (elt != bar) { bar.style.pointerEvents = "none" }
else { delay.set(1000, maybeDisable) }
}
delay.set(1000, maybeDisable)
};





    on(d.input, "keyup", function(e) { onKeyUp.call(cm, e); });
on(d.input, "input", function() {
if (ie && ie_version >= 9 && cm.display.inputHasSelection) cm.display.inputHasSelection = null;
readInput(cm);
});
on(d.input, "keydown", operation(cm, onKeyDown));
on(d.input, "keypress", operation(cm, onKeyPress));
on(d.input, "focus", bind(onFocus, cm));
on(d.input, "blur", bind(onBlur, cm));

NativeScrollbars.prototype.clear = function () {
var parent = this.horiz.parentNode
parent.removeChild(this.horiz)
parent.removeChild(this.vert)
};









    function drag_(e) {
if (!signalDOMEvent(cm, e)) e_stop(e);
}
if (cm.options.dragDrop) {
on(d.scroller, "dragstart", function(e){onDragStart(cm, e);});
on(d.scroller, "dragenter", drag_);
on(d.scroller, "dragover", drag_);
on(d.scroller, "drop", operation(cm, onDrop));
}
on(d.scroller, "paste", function(e) {
if (eventInWidget(d, e)) return;
cm.state.pasteIncoming = true;
focusInput(cm);
fastPoll(cm);
});
on(d.input, "paste", function() {
// Workaround for webkit bug https://bugs.webkit.org/show_bug.cgi?id=90206
// Add a char to the end of textarea before paste occur so that
// selection doesn't span to the end of textarea.
if (webkit && !cm.state.fakedLastChar && !(new Date - cm.state.lastMiddleDown < 200)) {
var start = d.input.selectionStart, end = d.input.selectionEnd;
d.input.value += "$";
// The selection end needs to be set before the start, otherwise there
// can be an intermediate non-empty selection between the two, which
// can override the middle-click paste buffer on linux and cause the
// wrong thing to get pasted.
d.input.selectionEnd = end;
d.input.selectionStart = start;
cm.state.fakedLastChar = true;
}
cm.state.pasteIncoming = true;
fastPoll(cm);
});

var NullScrollbars = function () {};





































    function prepareCopyCut(e) {
if (cm.somethingSelected()) {
lastCopied = cm.getSelections();
if (d.inaccurateSelection) {
d.prevInput = "";
d.inaccurateSelection = false;
d.input.value = lastCopied.join("\n");
selectInput(d.input);
}
} else {
var text = [], ranges = [];
for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
var line = cm.doc.sel.ranges[i].head.line;
var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
ranges.push(lineRange);
text.push(cm.getRange(lineRange.anchor, lineRange.head));
}
if (e.type == "cut") {
cm.setSelections(ranges, null, sel_dontScroll);
} else {
d.prevInput = "";
d.input.value = text.join("\n");
selectInput(d.input);
}
lastCopied = text;
}
if (e.type == "cut") cm.state.cutIncoming = true;
}
on(d.input, "cut", prepareCopyCut);
on(d.input, "copy", prepareCopyCut);

NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
NullScrollbars.prototype.setScrollLeft = function () {};
NullScrollbars.prototype.setScrollTop = function () {};
NullScrollbars.prototype.clear = function () {};































    // Needed to handle Tab key in KHTML
if (khtml) on(d.sizer, "mouseup", function() {
if (activeElt() == d.input) d.input.blur();
focusInput(cm);
});





function updateScrollbars(cm, measure) {
if (!measure) { measure = measureForScrollbars(cm) }
var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight
updateScrollbarsInner(cm, measure)
for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
{ updateHeightsInViewport(cm) }
updateScrollbarsInner(cm, measureForScrollbars(cm))
startWidth = cm.display.barWidth; startHeight = cm.display.barHeight

  }

  }

 
}





  // Called when the window resizes
function onResize(cm) {
var d = cm.display;
if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
return;
// Might be a text scaling operation, clear size caches.
d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
d.scrollbarsClipped = false;
cm.setSize();





















// Re-synchronize the fake scrollbars with the actual size of the
// content.
function updateScrollbarsInner(cm, measure) {
var d = cm.display
var sizes = d.scrollbars.update(measure)

d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px"
d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px"
d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent"

if (sizes.right && sizes.bottom) {
d.scrollbarFiller.style.display = "block"
d.scrollbarFiller.style.height = sizes.bottom + "px"
d.scrollbarFiller.style.width = sizes.right + "px"
} else { d.scrollbarFiller.style.display = "" }
if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
d.gutterFiller.style.display = "block"
d.gutterFiller.style.height = sizes.bottom + "px"
d.gutterFiller.style.width = measure.gutterWidth + "px"
} else { d.gutterFiller.style.display = "" }
}

var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars}

function initScrollbars(cm) {
if (cm.display.scrollbars) {
cm.display.scrollbars.clear()
if (cm.display.scrollbars.addClass)
{ rmClass(cm.display.wrapper, cm.display.scrollbars.addClass) }

  }


  }


  // MOUSE EVENTS














  cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller)
// Prevent clicks in the scrollbars from killing focus
on(node, "mousedown", function () {
if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0) }
})
node.setAttribute("cm-not-content", "true")
}, function (pos, axis) {
if (axis == "horizontal") { setScrollLeft(cm, pos) }
else { updateScrollTop(cm, pos) }
}, cm)
if (cm.display.scrollbars.addClass)
{ addClass(cm.display.wrapper, cm.display.scrollbars.addClass) }
}





  // Return true when the given mouse event happened in a widget
function eventInWidget(display, e) {
for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
(n.parentNode == display.sizer && n != display.mover))
return true;
}



















// Operations are used to wrap a series of changes to the editor
// state in such a way that each change won't have to update the
// cursor and display (which would be awkward, slow, and
// error-prone). Instead, display updates are batched and then all
// combined and executed at once.

var nextOpId = 0
// Start a new operation.
function startOperation(cm) {
cm.curOp = {
cm: cm,
viewChanged: false, // Flag that indicates that lines might need to be redrawn
startHeight: cm.doc.height, // Used to detect need to update scrollbar
forceUpdate: false, // Used to force a redraw
updateInput: null, // Whether to reset the input textarea
typing: false, // Whether this reset should be careful to leave existing text (for compositing)
changeObjs: null, // Accumulated changes, for firing change events
cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
selectionChanged: false, // Whether the selection needs to be redrawn
updateMaxLine: false, // Set when the widest line needs to be determined anew
scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
scrollToPos: null, // Used to scroll to a specific position
focus: false,
id: ++nextOpId // Unique ID

  }

  }

 
  pushOperation(cm.curOp)
}





  // Given a mouse event, find the corresponding position. If liberal
// is false, it checks whether a gutter or scrollbar was clicked,
// and returns null if it was. forRect is used by rectangular
// selections, and tries to estimate a character position even for
// coordinates beyond the right of the text.
function posFromMouse(cm, e, liberal, forRect) {
var display = cm.display;
if (!liberal && e_target(e).getAttribute("not-content") == "true") return null;


// Finish an operation, updating the display and signalling delayed events
function endOperation(cm) {
var op = cm.curOp
finishOperation(op, function (group) {
for (var i = 0; i < group.ops.length; i++)
{ group.ops[i].cm.curOp = null }
endOperations(group)
})
}





    var x, y, space = display.lineSpace.getBoundingClientRect();
// Fails unpredictably on IE[67] when mouse is dragged around quickly.
try { x = e.clientX - space.left; y = e.clientY - space.top; }
catch (e) { return null; }
var coords = coordsChar(cm, x, y), line;
if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
}
return coords;







































// The DOM updates done when an operation finishes are batched so
// that the minimum number of relayouts are required.
function endOperations(group) {
var ops = group.ops
for (var i = 0; i < ops.length; i++) // Read DOM
{ endOperation_R1(ops[i]) }
for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
{ endOperation_W1(ops[i$1]) }
for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
{ endOperation_R2(ops[i$2]) }
for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
{ endOperation_W2(ops[i$3]) }
for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
{ endOperation_finish(ops[i$4]) }
}

function endOperation_R1(op) {
var cm = op.cm, display = cm.display
maybeClipScrollbars(cm)
if (op.updateMaxLine) { findMaxLine(cm) }

op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
op.scrollToPos.to.line >= display.viewTo) ||
display.maxLineChanged && cm.options.lineWrapping
op.update = op.mustUpdate &&
new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate)
}

function endOperation_W1(op) {
op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update)
}

function endOperation_R2(op) {
var cm = op.cm, display = cm.display
if (op.updatedDisplay) { updateHeightsInViewport(cm) }

op.barMeasure = measureForScrollbars(cm)

// If the max line changed since it was last measured, measure it,
// and ensure the document's width matches it.
// updateDisplay_W2 will use these properties to do the actual resizing
if (display.maxLineChanged && !cm.options.lineWrapping) {
op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3
cm.display.sizerWidth = op.adjustWidthTo
op.barMeasure.scrollWidth =
Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth)
op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm))

  }


  }


  // A mouse down can be a single click, double click, triple click,
// start of selection drag, start of text drag, new cursor
// (ctrl-click), rectangle drag (alt-drag), or xwin
// middle-click-paste. Or it might be a click on something we should
// not interfere with, such as a scrollbar or widget.
function onMouseDown(e) {
if (signalDOMEvent(this, e)) return;
var cm = this, display = cm.display;
display.shift = e.shiftKey;

  if (op.updatedDisplay || op.selectionChanged)
{ op.preparedSelection = display.input.prepareSelection() }
}











    if (eventInWidget(display, e)) {
if (!webkit) {
// Briefly turn off draggability, to allow widgets to do
// normal dragging things.
display.scroller.draggable = false;
setTimeout(function(){display.scroller.draggable = true;}, 100);
}
return;
}
if (clickInGutter(cm, e)) return;
var start = posFromMouse(cm, e);
window.focus();

function endOperation_W2(op) {
var cm = op.cm















    switch (e_button(e)) {
case 1:
if (start)
leftButtonDown(cm, e, start);
else if (e_target(e) == display.scroller)
e_preventDefault(e);
break;
case 2:
if (webkit) cm.state.lastMiddleDown = +new Date;
if (start) extendSelection(cm.doc, start);
setTimeout(bind(focusInput, cm), 20);
e_preventDefault(e);
break;
case 3:
if (captureRightClick) onContextMenu(cm, e);
break;
}

  if (op.adjustWidthTo != null) {
cm.display.sizer.style.minWidth = op.adjustWidthTo + "px"
if (op.maxScrollLeft < cm.doc.scrollLeft)
{ setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true) }
cm.display.maxLineChanged = false













  }


  }


  var lastClick, lastDoubleClick;
function leftButtonDown(cm, e, start) {
setTimeout(bind(ensureFocus, cm), 0);





  var takeFocus = op.focus && op.focus == activeElt()
if (op.preparedSelection)
{ cm.display.input.showSelection(op.preparedSelection, takeFocus) }
if (op.updatedDisplay || op.startHeight != cm.doc.height)
{ updateScrollbars(cm, op.barMeasure) }
if (op.updatedDisplay)
{ setDocumentHeight(cm, op.barMeasure) }





    var now = +new Date, type;
if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleClick.pos, start) == 0) {
type = "triple";
} else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, start) == 0) {
type = "double";
lastDoubleClick = {time: now, pos: start};
} else {
type = "single";
lastClick = {time: now, pos: start};
}

  if (op.selectionChanged) { restartBlink(cm) }














    var sel = cm.doc.sel, modifier = mac ? e.metaKey : e.ctrlKey, contained;
if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) &&
type == "single" && (contained = sel.contains(start)) > -1 &&
!sel.ranges[contained].empty())
leftButtonStartDrag(cm, e, start, modifier);
else
leftButtonSelect(cm, e, start, type, modifier);

















  if (cm.state.focused && op.updateInput)
{ cm.display.input.reset(op.typing) }
if (takeFocus) { ensureFocus(op.cm) }
}

function endOperation_finish(op) {
var cm = op.cm, display = cm.display, doc = cm.doc

if (op.updatedDisplay) { postUpdateDisplay(cm, op.update) }

// Abort mouse wheel delta measurement, when scrolling explicitly
if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
{ display.wheelStartX = display.wheelStartY = null }

// Propagate the scroll position to the actual DOM scroller
if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll) }

if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true) }
// If we need to scroll a specific position into view, do so.
if (op.scrollToPos) {
var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin)
maybeScrollWindow(cm, rect)

  }


  }


  // Start a text drag. When it ends, see if any dragging actually
// happen, and treat as a click if it didn't.
function leftButtonStartDrag(cm, e, start, modifier) {
var display = cm.display;
var dragEnd = operation(cm, function(e2) {
if (webkit) display.scroller.draggable = false;
cm.state.draggingText = false;
off(document, "mouseup", dragEnd);
off(display.scroller, "drop", dragEnd);
if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
e_preventDefault(e2);
if (!modifier)
extendSelection(cm.doc, start);
focusInput(cm);
// Work around unexplainable focus problem in IE9 (#2127)
if (ie && ie_version == 9)
setTimeout(function() {document.body.focus(); focusInput(cm);}, 20);
}
});
// Let the drag handler handle this.
if (webkit) display.scroller.draggable = true;
cm.state.draggingText = dragEnd;
// IE's approach to draggable
if (display.scroller.dragDrop) display.scroller.dragDrop();
on(document, "mouseup", dragEnd);
on(display.scroller, "drop", dragEnd);


























  // Fire events for markers that are hidden/unidden by editing or
// undoing
var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers
if (hidden) { for (var i = 0; i < hidden.length; ++i)
{ if (!hidden[i].lines.length) { signal(hidden[i], "hide") } } }
if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
{ if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide") } } }

if (display.wrapper.offsetHeight)
{ doc.scrollTop = cm.display.scroller.scrollTop }

// Fire change events, and delayed event handlers
if (op.changeObjs)
{ signal(cm, "changes", cm, op.changeObjs) }
if (op.update)
{ op.update.finish() }
}

// Run the given function in an operation
function runInOp(cm, f) {
if (cm.curOp) { return f() }
startOperation(cm)
try { return f() }
finally { endOperation(cm) }
}
// Wraps a function in an operation. Returns the wrapped function.
function operation(cm, f) {
return function() {
if (cm.curOp) { return f.apply(cm, arguments) }
startOperation(cm)
try { return f.apply(cm, arguments) }
finally { endOperation(cm) }
}
}
// Used to add methods to editor and doc instances, wrapping them in
// operations.
function methodOp(f) {
return function() {
if (this.curOp) { return f.apply(this, arguments) }
startOperation(this)
try { return f.apply(this, arguments) }
finally { endOperation(this) }
}
}
function docMethodOp(f) {
return function() {
var cm = this.cm
if (!cm || cm.curOp) { return f.apply(this, arguments) }
startOperation(cm)
try { return f.apply(this, arguments) }
finally { endOperation(cm) }

  }

  }

 
}





  // Normal selection, as opposed to text dragging.
function leftButtonSelect(cm, e, start, type, addNew) {
var display = cm.display, doc = cm.doc;
e_preventDefault(e);







// Updates the display.view data structure for a given change to the
// document. From and to are in pre-change coordinates. Lendiff is
// the amount of lines added or subtracted by the change. This is
// used for changes that span multiple lines, or change the way
// lines are divided into visual lines. regLineChange (below)
// registers single-line changes.
function regChange(cm, from, to, lendiff) {
if (from == null) { from = cm.doc.first }
if (to == null) { to = cm.doc.first + cm.doc.size }
if (!lendiff) { lendiff = 0 }





    var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
if (addNew && !e.shiftKey) {
ourIndex = doc.sel.contains(start);
if (ourIndex > -1)
ourRange = ranges[ourIndex];
else
ourRange = new Range(start, start);







  var display = cm.display
if (lendiff && to < display.viewTo &&
(display.updateLineNumbers == null || display.updateLineNumbers > from))
{ display.updateLineNumbers = from }

cm.curOp.viewChanged = true

if (from >= display.viewTo) { // Change after
if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
{ resetView(cm) }
} else if (to <= display.viewFrom) { // Change before
if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
resetView(cm)

    } else {

    } else {

      ourRange = doc.sel.primary();


      display.viewFrom += lendiff
display.viewTo += lendiff

    }

    }


if (e.altKey) {
type = "rect";
if (!addNew) ourRange = new Range(start, start);
start = posFromMouse(cm, e, true, true);
ourIndex = -1;
} else if (type == "double") {
var word = cm.findWordAt(start);
if (cm.display.shift || doc.extend)
ourRange = extendRange(doc, ourRange, word.anchor, word.head);
else
ourRange = word;
} else if (type == "triple") {
var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0)));
if (cm.display.shift || doc.extend)
ourRange = extendRange(doc, ourRange, line.anchor, line.head);
else
ourRange = line;

  } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
resetView(cm)
} else if (from <= display.viewFrom) { // Top overlap
var cut = viewCuttingPoint(cm, to, to + lendiff, 1)
if (cut) {
display.view = display.view.slice(cut.index)
display.viewFrom = cut.lineN
display.viewTo += lendiff











    } else {

    } else {

      ourRange = extendRange(doc, ourRange, start);

      resetView(cm)

    }

    }


if (!addNew) {
ourIndex = 0;
setSelection(doc, new Selection([ourRange], 0), sel_mouse);
startSel = doc.sel;
} else if (ourIndex == -1) {
ourIndex = ranges.length;
setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
{scroll: false, origin: "*mouse"});
} else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single") {
setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0));
startSel = doc.sel;

  } else if (to >= display.viewTo) { // Bottom overlap
var cut$1 = viewCuttingPoint(cm, from, from, -1)
if (cut$1) {
display.view = display.view.slice(0, cut$1.index)
display.viewTo = cut$1.lineN








    } else {

    } else {

      replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);

      resetView(cm)

    }

    }

 
  } else { // Gap in the middle
var cutTop = viewCuttingPoint(cm, from, from, -1)
var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1)
if (cutTop && cutBot) {
display.view = display.view.slice(0, cutTop.index)
.concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
.concat(display.view.slice(cutBot.index))
display.viewTo += lendiff
} else {
resetView(cm)
}
}





    var lastPos = start;
function extendTo(pos) {
if (cmp(lastPos, pos) == 0) return;
lastPos = pos;





  var ext = display.externalMeasured
if (ext) {
if (to < ext.lineN)
{ ext.lineN += lendiff }
else if (from < ext.lineN + ext.size)
{ display.externalMeasured = null }
}
}





      if (type == "rect") {
var ranges = [], tabSize = cm.options.tabSize;
var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
line <= end; line++) {
var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
if (left == right)
ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos)));
else if (text.length > leftPos)
ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize))));
}
if (!ranges.length) ranges.push(new Range(start, start));
setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
{origin: "*mouse", scroll: false});
cm.scrollIntoView(pos);
} else {
var oldRange = ourRange;
var anchor = oldRange.anchor, head = pos;
if (type != "single") {
if (type == "double")
var range = cm.findWordAt(pos);
else
var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0)));
if (cmp(range.anchor, anchor) > 0) {
head = range.head;
anchor = minPos(oldRange.from(), range.anchor);
} else {
head = range.anchor;
anchor = maxPos(oldRange.to(), range.head);
}
}
var ranges = startSel.ranges.slice(0);
ranges[ourIndex] = new Range(clipPos(doc, anchor), head);
setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse);
}
}

// Register a change to a single line. Type must be one of "text",
// "gutter", "class", "widget"
function regLineChange(cm, line, type) {
cm.curOp.viewChanged = true
var display = cm.display, ext = cm.display.externalMeasured
if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
{ display.externalMeasured = null }




































    var editorSize = display.wrapper.getBoundingClientRect();
// Used to ensure timeout re-tries don't fire when another extend
// happened in the meantime (clearTimeout isn't reliable -- at
// least on Chrome, the timeouts still happen even when cleared,
// if the clear happens after their scheduled firing time).
var counter = 0;

  if (line < display.viewFrom || line >= display.viewTo) { return }
var lineView = display.view[findViewIndex(cm, line)]
if (lineView.node == null) { return }
var arr = lineView.changes || (lineView.changes = [])
if (indexOf(arr, type) == -1) { arr.push(type) }
}





    function extend(e) {
var curCount = ++counter;
var cur = posFromMouse(cm, e, true, type == "rect");
if (!cur) return;
if (cmp(cur, lastPos) != 0) {
ensureFocus(cm);
extendTo(cur);
var visible = visibleLines(display, doc);
if (cur.line >= visible.to || cur.line < visible.from)
setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
} else {
var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
if (outside) setTimeout(operation(cm, function() {
if (counter != curCount) return;
display.scroller.scrollTop += outside;
extend(e);
}), 50);
}
}

// Clear the view.
function resetView(cm) {
cm.display.viewFrom = cm.display.viewTo = cm.doc.first
cm.display.view = []
cm.display.viewOffset = 0
}


















    function done(e) {
counter = Infinity;
e_preventDefault(e);
focusInput(cm);
off(document, "mousemove", move);
off(document, "mouseup", up);
doc.history.lastSelOrigin = null;








function viewCuttingPoint(cm, oldN, newN, dir) {
var index = findViewIndex(cm, oldN), diff, view = cm.display.view
if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
{ return {index: index, lineN: newN} }
var n = cm.display.viewFrom
for (var i = 0; i < index; i++)
{ n += view[i].size }
if (n != oldN) {
if (dir > 0) {
if (index == view.length - 1) { return null }
diff = (n + view[index].size) - oldN
index++
} else {
diff = n - oldN

    }

    }

 
    oldN += diff; newN += diff
}
while (visualLineNo(cm.doc, newN) != newN) {
if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
newN += dir * view[index - (dir < 0 ? 1 : 0)].size
index += dir
}
return {index: index, lineN: newN}
}





    var move = operation(cm, function(e) {
if (!e_button(e)) done(e);
else extend(e);
});
var up = operation(cm, done);
on(document, "mousemove", move);
on(document, "mouseup", up);











// Force the view to cover a given range, adding empty view element
// or clipping off existing ones as needed.
function adjustView(cm, from, to) {
var display = cm.display, view = display.view
if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
display.view = buildViewArray(cm, from, to)
display.viewFrom = from
} else {
if (display.viewFrom > from)
{ display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view) }
else if (display.viewFrom < from)
{ display.view = display.view.slice(findViewIndex(cm, from)) }
display.viewFrom = from
if (display.viewTo < to)
{ display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)) }
else if (display.viewTo > to)
{ display.view = display.view.slice(0, findViewIndex(cm, to)) }

  }

  }

 
  display.viewTo = to
}





  // Determines whether an event happened in the gutter, and fires the
// handlers for the corresponding event.
function gutterEvent(cm, e, type, prevent, signalfn) {
try { var mX = e.clientX, mY = e.clientY; }
catch(e) { return false; }
if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false;
if (prevent) e_preventDefault(e);




// Count the number of lines in the view whose DOM representation is
// out of date (or nonexistent).
function countDirtyView(cm) {
var view = cm.display.view, dirty = 0
for (var i = 0; i < view.length; i++) {
var lineView = view[i]
if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty }
}
return dirty
}





    var display = cm.display;
var lineBox = display.lineDiv.getBoundingClientRect();

// HIGHLIGHT WORKER






    if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e);
mY -= lineBox.top - display.viewOffset;



function startWorker(cm, time) {
if (cm.doc.highlightFrontier < cm.display.viewTo)
{ cm.state.highlight.set(time, bind(highlightWorker, cm)) }
}





    for (var i = 0; i < cm.options.gutters.length; ++i) {
var g = display.gutters.childNodes[i];
if (g && g.getBoundingClientRect().right >= mX) {
var line = lineAtHeight(cm.doc, mY);
var gutter = cm.options.gutters[i];
signalfn(cm, type, cm, line, gutter, e);
return e_defaultPrevented(e);
}





















function highlightWorker(cm) {
var doc = cm.doc
if (doc.highlightFrontier >= cm.display.viewTo) { return }
var end = +new Date + cm.options.workTime
var context = getContextBefore(cm, doc.highlightFrontier)
var changedLines = []

doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
if (context.line >= cm.display.viewFrom) { // Visible
var oldStyles = line.styles
var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null
var highlighted = highlightLine(cm, line, context, true)
if (resetState) { context.state = resetState }
line.styles = highlighted.styles
var oldCls = line.styleClasses, newCls = highlighted.classes
if (newCls) { line.styleClasses = newCls }
else if (oldCls) { line.styleClasses = null }
var ischange = !oldStyles || oldStyles.length != line.styles.length ||
oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass)
for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i] }
if (ischange) { changedLines.push(context.line) }
line.stateAfter = context.save()
context.nextLine()
} else {
if (line.text.length <= cm.options.maxHighlightLength)
{ processLine(cm, line.text, context) }
line.stateAfter = context.line % 5 == 0 ? context.save() : null
context.nextLine()

    }

    }

  }












    if (+new Date > end) {
startWorker(cm, cm.options.workDelay)
return true
}
})
doc.highlightFrontier = context.line
doc.modeFrontier = Math.max(doc.modeFrontier, context.line)
if (changedLines.length) { runInOp(cm, function () {
for (var i = 0; i < changedLines.length; i++)
{ regLineChange(cm, changedLines[i], "text") }
}) }
}





  function clickInGutter(cm, e) {
return gutterEvent(cm, e, "gutterClick", true, signalLater);
}

// DISPLAY DRAWING







  // Kludge to work around strange IE behavior where it'll sometimes
// re-fire a series of drag-related events right after the drop (#1551)
var lastDrop = 0;

var DisplayUpdate = function(cm, viewport, force) {
var display = cm.display






  function onDrop(e) {
var cm = this;
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
return;
e_preventDefault(e);
if (ie) lastDrop = +new Date;
var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
if (!pos || isReadOnly(cm)) return;
// Might be a file drop, in which case we simply extract the text
// and insert it.
if (files && files.length && window.FileReader && window.File) {
var n = files.length, text = Array(n), read = 0;
var loadFile = function(file, i) {
var reader = new FileReader;
reader.onload = operation(cm, function() {
text[i] = reader.result;
if (++read == n) {
pos = clipPos(cm.doc, pos);
var change = {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"};
makeChange(cm.doc, change);
setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
}
});
reader.readAsText(file);
};
for (var i = 0; i < n; ++i) loadFile(files[i], i);
} else { // Normal drop
// Don't do a replace if the drop happened inside of the selected text.
if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
cm.state.draggingText(e);
// Ensure the editor is re-focused
setTimeout(bind(focusInput, cm), 20);
return;
}
try {
var text = e.dataTransfer.getData("Text");
if (text) {
if (cm.state.draggingText && !(mac ? e.metaKey : e.ctrlKey))
var selected = cm.listSelections();
setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
if (selected) for (var i = 0; i < selected.length; ++i)
replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag");
cm.replaceSelection(text, "around", "paste");
focusInput(cm);
}
}
catch(e){}

  this.viewport = viewport
// Store some values that we'll need later (but don't want to force a relayout for)
this.visible = visibleLines(display, cm.doc, viewport)
this.editorIsHidden = !display.wrapper.offsetWidth
this.wrapperHeight = display.wrapper.clientHeight
this.wrapperWidth = display.wrapper.clientWidth
this.oldDisplayWidth = displayWidth(cm)
this.force = force
this.dims = getDimensions(cm)
this.events = []
};

DisplayUpdate.prototype.signal = function (emitter, type) {
if (hasHandler(emitter, type))
{ this.events.push(arguments) }
};
DisplayUpdate.prototype.finish = function () {
var this$1 = this;

for (var i = 0; i < this.events.length; i++)
{ signal.apply(null, this$1.events[i]) }
};

function maybeClipScrollbars(cm) {
var display = cm.display
if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth
display.heightForcer.style.height = scrollGap(cm) + "px"
display.sizer.style.marginBottom = -display.nativeBarWidth + "px"
display.sizer.style.borderRightWidth = scrollGap(cm) + "px"
display.scrollbarsClipped = true
}
}

function selectionSnapshot(cm) {
if (cm.hasFocus()) { return null }
var active = activeElt()
if (!active || !contains(cm.display.lineDiv, active)) { return null }
var result = {activeElt: active}
if (window.getSelection) {
var sel = window.getSelection()
if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
result.anchorNode = sel.anchorNode
result.anchorOffset = sel.anchorOffset
result.focusNode = sel.focusNode
result.focusOffset = sel.focusOffset


    }
}

    }
}

 
  return result
}





  function onDragStart(cm, e) {
if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;










function restoreSelection(snapshot) {
if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
snapshot.activeElt.focus()
if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
var sel = window.getSelection(), range = document.createRange()
range.setEnd(snapshot.anchorNode, snapshot.anchorOffset)
range.collapse(false)
sel.removeAllRanges()
sel.addRange(range)
sel.extend(snapshot.focusNode, snapshot.focusOffset)
}
}





    e.dataTransfer.setData("Text", cm.getSelection());





// Does the actual updating of the line display. Bails out
// (returning false) when there is nothing to be done and forced is
// false.
function updateDisplayIfNeeded(cm, update) {
var display = cm.display, doc = cm.doc





    // Use dummy image instead of default browsers image.
// Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
if (e.dataTransfer.setDragImage && !safari) {
var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
if (presto) {
img.width = img.height = 1;
cm.display.wrapper.appendChild(img);
// Force a relayout, or Opera won't use our image for some obscure reason
img._top = img.offsetTop;
}
e.dataTransfer.setDragImage(img, 0, 0);
if (presto) img.parentNode.removeChild(img);
}

  if (update.editorIsHidden) {
resetView(cm)
return false












  }


  }


  // SCROLL EVENTS






  // Bail out if the visible area is already rendered and nothing changed.
if (!update.force &&
update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
(display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
display.renderedView == display.view && countDirtyView(cm) == 0)
{ return false }





  // Sync the scrollable area and scrollbars, ensure the viewport
// covers the visible area.
function setScrollTop(cm, val) {
if (Math.abs(cm.doc.scrollTop - val) < 2) return;
cm.doc.scrollTop = val;
if (!gecko) updateDisplaySimple(cm, {top: val});
if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
cm.display.scrollbars.setScrollTop(val);
if (gecko) updateDisplaySimple(cm);
startWorker(cm, 100);

  if (maybeUpdateLineNumberWidth(cm)) {
resetView(cm)
update.dims = getDimensions(cm)








  }

  }

  // Sync scroller and scrollbar, ensure the gutter elements are
// aligned.
function setScrollLeft(cm, val, isScroller) {
if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return;
val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
cm.doc.scrollLeft = val;
alignHorizontally(cm);
if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
cm.display.scrollbars.setScrollLeft(val);



// Compute a suitable new viewport (from & to)
var end = doc.first + doc.size
var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first)
var to = Math.min(end, update.visible.to + cm.options.viewportMargin)
if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom) }
if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo) }
if (sawCollapsedSpans) {
from = visualLineNo(cm.doc, from)
to = visualLineEndNo(cm.doc, to)

  }


  }


  // Since the delta values reported on mouse wheel events are
// unstandardized between browsers and even browser versions, and
// generally horribly unpredictable, this code starts by measuring
// the scroll effect that the first few mouse wheel events have,
// and, from that, detects the way it can convert deltas to pixel
// offsets afterwards.
//
// The reason we want to know the amount a wheel event will scroll
// is that it gives us a chance to update the display before the
// actual scrolling happens, reducing flickering.

  var different = from != display.viewFrom || to != display.viewTo ||
display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth
adjustView(cm, from, to)












  var wheelSamples = 0, wheelPixelsPerUnit = null;
// Fill in a browser-detected starting value on browsers where we
// know one. These don't have to be accurate -- the result of them
// being wrong would just be a slight flicker on the first wheel
// scroll (if it is large enough).
if (ie) wheelPixelsPerUnit = -.53;
else if (gecko) wheelPixelsPerUnit = 15;
else if (chrome) wheelPixelsPerUnit = -.7;
else if (safari) wheelPixelsPerUnit = -1/3;

  display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom))
// Position the mover div to align with the current scroll position
cm.display.mover.style.top = display.viewOffset + "px"











  var wheelEventDelta = function(e) {
var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
else if (dy == null) dy = e.wheelDelta;
return {x: dx, y: dy};
};
CodeMirror.wheelEventPixels = function(e) {
var delta = wheelEventDelta(e);
delta.x *= wheelPixelsPerUnit;
delta.y *= wheelPixelsPerUnit;
return delta;
};

  var toUpdate = countDirtyView(cm)
if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
(display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
{ return false }














  function onScrollWheel(cm, e) {
var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;









  // For big changes, we hide the enclosing element during the
// update, since that speeds up the operations on most browsers.
var selSnapshot = selectionSnapshot(cm)
if (toUpdate > 4) { display.lineDiv.style.display = "none" }
patchDisplay(cm, display.updateLineNumbers, update.dims)
if (toUpdate > 4) { display.lineDiv.style.display = "" }
display.renderedView = display.view
// There might have been a widget with a focused element that got
// hidden or updated, if so re-focus it.
restoreSelection(selSnapshot)





    var display = cm.display, scroll = display.scroller;
// Quit if there's nothing to scroll here
if (!(dx && scroll.scrollWidth > scroll.clientWidth ||
dy && scroll.scrollHeight > scroll.clientHeight)) return;


  // Prevent selection and cursors from interfering with the scroll
// width and height.
removeChildren(display.cursorDiv)
removeChildren(display.selectionDiv)
display.gutters.style.height = display.sizer.style.minHeight = 0





    // Webkit browsers on OS X abort momentum scrolls when the target
// of the scroll event is removed from the scrollable element.
// This hack (see related code in patchDisplay) makes sure the
// element is kept around.
if (dy && mac && webkit) {
outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
for (var i = 0; i < view.length; i++) {
if (view[i].node == cur) {
cm.display.currentWheelTarget = cur;
break outer;
}
}
}
}

  if (different) {
display.lastWrapHeight = update.wrapperHeight
display.lastWrapWidth = update.wrapperWidth
startWorker(cm, 400)
}














    // On some browsers, horizontal scrolling will cause redraws to
// happen before the gutter has been realigned, causing it to
// wriggle around in a most unseemly way. When we have an
// estimated pixels/delta value, we just handle horizontal
// scrolling entirely here. It'll be slightly off from native, but
// better than glitching out.
if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
if (dy)
setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
e_preventDefault(e);
display.wheelStartX = null; // Abort measurement, if in progress
return;
}

  display.updateLineNumbers = null


















    // 'Project' the visible viewport to cover the area that is being
// scrolled into view (if we know enough to estimate it).
if (dy && wheelPixelsPerUnit != null) {
var pixels = dy * wheelPixelsPerUnit;
var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
if (pixels < 0) top = Math.max(0, top + pixels - 50);
else bot = Math.min(cm.doc.height, bot + pixels + 50);
updateDisplaySimple(cm, {top: top, bottom: bot});
}

  return true
}












    if (wheelSamples < 20) {
if (display.wheelStartX == null) {
display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
display.wheelDX = dx; display.wheelDY = dy;
setTimeout(function() {
if (display.wheelStartX == null) return;
var movedX = scroll.scrollLeft - display.wheelStartX;
var movedY = scroll.scrollTop - display.wheelStartY;
var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
(movedX && display.wheelDX && movedX / display.wheelDX);
display.wheelStartX = display.wheelStartY = null;
if (!sample) return;
wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
++wheelSamples;
}, 200);
} else {
display.wheelDX += dx; display.wheelDY += dy;
}

function postUpdateDisplay(cm, update) {
var viewport = update.viewport

for (var first = true;; first = false) {
if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
// Clip forced viewport to actual scrollable area.
if (viewport && viewport.top != null)
{ viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)} }
// Updated line heights might result in the drawn area not
// actually covering the viewport. Keep looping until it does.
update.visible = visibleLines(cm.display, cm.doc, viewport)
if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
{ break }






    }

    }

 
    if (!updateDisplayIfNeeded(cm, update)) { break }
updateHeightsInViewport(cm)
var barMeasure = measureForScrollbars(cm)
updateSelection(cm)
updateScrollbars(cm, barMeasure)
setDocumentHeight(cm, barMeasure)
update.force = false

  }


  }


  // KEY EVENTS

// Run a handler that was bound to a key.
function doHandleBinding(cm, bound, dropShift) {
if (typeof bound == "string") {
bound = commands[bound];
if (!bound) return false;
}
// Ensure previous input has been read, so that the handler sees a
// consistent view of the document
if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false;
var prevShift = cm.display.shift, done = false;
try {
if (isReadOnly(cm)) cm.state.suppressEdits = true;
if (dropShift) cm.display.shift = false;
done = bound(cm) != Pass;
} finally {
cm.display.shift = prevShift;
cm.state.suppressEdits = false;
}
return done;

  update.signal(cm, "update", cm)
if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo)
cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo


















  }

  }

 
}





  function lookupKeyForEditor(cm, name, handle) {
for (var i = 0; i < cm.state.keyMaps.length; i++) {
var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
if (result) return result;
}
return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
|| lookupKey(name, cm.options.keyMap, handle, cm);




function updateDisplaySimple(cm, viewport) {
var update = new DisplayUpdate(cm, viewport)
if (updateDisplayIfNeeded(cm, update)) {
updateHeightsInViewport(cm)
postUpdateDisplay(cm, update)
var barMeasure = measureForScrollbars(cm)
updateSelection(cm)
updateScrollbars(cm, barMeasure)
setDocumentHeight(cm, barMeasure)
update.finish()

  }

  }

 
}





  var stopSeq = new Delayed;
function dispatchKey(cm, name, e, handle) {
var seq = cm.state.keySeq;
if (seq) {
if (isModifierKey(name)) return "handled";
stopSeq.set(50, function() {
if (cm.state.keySeq == seq) {
cm.state.keySeq = null;
resetInput(cm);
}
});
name = seq + " " + name;
}
var result = lookupKeyForEditor(cm, name, handle);

// Sync the actual display DOM structure with display.view, removing
// nodes for lines that are no longer in view, and creating the ones
// that are not there yet, and updating the ones that are out of
// date.
function patchDisplay(cm, updateNumbersFrom, dims) {
var display = cm.display, lineNumbers = cm.options.lineNumbers
var container = display.lineDiv, cur = container.firstChild












    if (result == "multi")
cm.state.keySeq = name;
if (result == "handled")
signalLater(cm, "keyHandled", cm, name, e);






  function rm(node) {
var next = node.nextSibling
// Works around a throw-scroll bug in OS X Webkit
if (webkit && mac && cm.display.currentWheelTarget == node)
{ node.style.display = "none" }
else
{ node.parentNode.removeChild(node) }
return next
}





    if (result == "handled" || result == "multi") {
e_preventDefault(e);
restartBlink(cm);




















  var view = display.view, lineN = display.viewFrom
// Loop over the elements in the view, syncing cur (the DOM nodes
// in display.lineDiv) with the view as we go.
for (var i = 0; i < view.length; i++) {
var lineView = view[i]
if (lineView.hidden) {
} else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
var node = buildLineElement(cm, lineView, lineN, dims)
container.insertBefore(node, cur)
} else { // Already drawn
while (cur != lineView.node) { cur = rm(cur) }
var updateNumber = lineNumbers && updateNumbersFrom != null &&
updateNumbersFrom <= lineN && lineView.lineNumber
if (lineView.changes) {
if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false }
updateLineForChanges(cm, lineView, lineN, dims)
}
if (updateNumber) {
removeChildren(lineView.lineNumber)
lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)))
}
cur = lineView.node.nextSibling

    }

    }


if (seq && !result && /\'$/.test(name)) {
e_preventDefault(e);
return true;
}
return !!result;

    lineN += lineView.size






  }

  }

 
  while (cur) { cur = rm(cur) }
}





  // Handle a key from the keydown event.
function handleKeyBinding(cm, e) {
var name = keyName(e, true);
if (!name) return false;

function updateGutterSpace(cm) {
var width = cm.display.gutters.offsetWidth
cm.display.sizer.style.marginLeft = width + "px"
}





    if (e.shiftKey && !cm.state.keySeq) {
// First try to resolve full name (including 'Shift-'). Failing
// that, see if there is a cursor-motion command (starting with
// 'go') bound to the keyname without 'Shift-'.
return dispatchKey(cm, "Shift-" + name, e, function(b) {return doHandleBinding(cm, b, true);})
|| dispatchKey(cm, name, e, function(b) {
if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
return doHandleBinding(cm, b);
});
} else {
return dispatchKey(cm, name, e, function(b) { return doHandleBinding(cm, b); });








function setDocumentHeight(cm, measure) {
cm.display.sizer.style.minHeight = measure.docHeight + "px"
cm.display.heightForcer.style.top = measure.docHeight + "px"
cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px"
}

// Rebuild the gutter elements, ensure the margin to the left of the
// code matches their width.
function updateGutters(cm) {
var gutters = cm.display.gutters, specs = cm.options.gutters
removeChildren(gutters)
var i = 0
for (; i < specs.length; ++i) {
var gutterClass = specs[i]
var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass))
if (gutterClass == "CodeMirror-linenumbers") {
cm.display.lineGutter = gElt
gElt.style.width = (cm.display.lineNumWidth || 1) + "px"

    }
}

    }
}

 
  gutters.style.display = i ? "" : "none"
updateGutterSpace(cm)
}





  // Handle a key from the keypress event
function handleCharBinding(cm, e, ch) {
return dispatchKey(cm, "'" + ch + "'", e,
function(b) { return doHandleBinding(cm, b, true); });






// Make sure the gutters options contains the element
// "CodeMirror-linenumbers" when the lineNumbers option is true.
function setGuttersForLineNumbers(options) {
var found = indexOf(options.gutters, "CodeMirror-linenumbers")
if (found == -1 && options.lineNumbers) {
options.gutters = options.gutters.concat(["CodeMirror-linenumbers"])
} else if (found > -1 && !options.lineNumbers) {
options.gutters = options.gutters.slice(0)
options.gutters.splice(found, 1)

  }

  }

 
}





  var lastStoppedKey = null;
function onKeyDown(e) {
var cm = this;
ensureFocus(cm);
if (signalDOMEvent(cm, e)) return;
// IE does strange things with escape.
if (ie && ie_version < 11 && e.keyCode == 27) e.returnValue = false;
var code = e.keyCode;
cm.display.shift = code == 16 || e.shiftKey;
var handled = handleKeyBinding(cm, e);
if (presto) {
lastStoppedKey = handled ? code : null;
// Opera has no cut event... we try to at least catch the key combo
if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
cm.replaceSelection("", null, "cut");
}

var wheelSamples = 0;
var wheelPixelsPerUnit = null;
// Fill in a browser-detected starting value on browsers where we
// know one. These don't have to be accurate -- the result of them
// being wrong would just be a slight flicker on the first wheel
// scroll (if it is large enough).
if (ie) { wheelPixelsPerUnit = -.53 }
else if (gecko) { wheelPixelsPerUnit = 15 }
else if (chrome) { wheelPixelsPerUnit = -.7 }
else if (safari) { wheelPixelsPerUnit = -1/3 }











    // Turn mouse into crosshair when Alt is held on Mac.
if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
showCrossHair(cm);
}










function wheelEventDelta(e) {
var dx = e.wheelDeltaX, dy = e.wheelDeltaY
if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail }
if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail }
else if (dy == null) { dy = e.wheelDelta }
return {x: dx, y: dy}
}
function wheelEventPixels(e) {
var delta = wheelEventDelta(e)
delta.x *= wheelPixelsPerUnit
delta.y *= wheelPixelsPerUnit
return delta
}





  function showCrossHair(cm) {
var lineDiv = cm.display.lineDiv;
addClass(lineDiv, "CodeMirror-crosshair");

function onScrollWheel(cm, e) {
var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y






    function up(e) {
if (e.keyCode == 18 || !e.altKey) {
rmClass(lineDiv, "CodeMirror-crosshair");
off(document, "keyup", up);
off(document, "mouseover", up);













  var display = cm.display, scroll = display.scroller
// Quit if there's nothing to scroll here
var canScrollX = scroll.scrollWidth > scroll.clientWidth
var canScrollY = scroll.scrollHeight > scroll.clientHeight
if (!(dx && canScrollX || dy && canScrollY)) { return }

// Webkit browsers on OS X abort momentum scrolls when the target
// of the scroll event is removed from the scrollable element.
// This hack (see related code in patchDisplay) makes sure the
// element is kept around.
if (dy && mac && webkit) {
outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
for (var i = 0; i < view.length; i++) {
if (view[i].node == cur) {
cm.display.currentWheelTarget = cur
break outer
}

      }
}

      }
}

    on(document, "keyup", up);
on(document, "mouseover", up);

 
  }


  }


  function onKeyUp(e) {
if (e.keyCode == 16) this.doc.sel.shift = false;
signalDOMEvent(this, e);
















  // On some browsers, horizontal scrolling will cause redraws to
// happen before the gutter has been realigned, causing it to
// wriggle around in a most unseemly way. When we have an
// estimated pixels/delta value, we just handle horizontal
// scrolling entirely here. It'll be slightly off from native, but
// better than glitching out.
if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
if (dy && canScrollY)
{ updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)) }
setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit))
// Only prevent default scrolling if vertical scrolling is
// actually possible. Otherwise, it causes vertical scroll
// jitter on OSX trackpads when deltaX is small and deltaY
// is large (issue #3579)
if (!dy || (dy && canScrollY))
{ e_preventDefault(e) }
display.wheelStartX = null // Abort measurement, if in progress
return

  }


  }


  function onKeyPress(e) {
var cm = this;
if (signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) return;
var keyCode = e.keyCode, charCode = e.charCode;
if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
if (((presto && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return;
var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
if (handleCharBinding(cm, e, ch)) return;
if (ie && ie_version >= 9) cm.display.inputHasSelection = null;
fastPoll(cm);

  // 'Project' the visible viewport to cover the area that is being
// scrolled into view (if we know enough to estimate it).
if (dy && wheelPixelsPerUnit != null) {
var pixels = dy * wheelPixelsPerUnit
var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight
if (pixels < 0) { top = Math.max(0, top + pixels - 50) }
else { bot = Math.min(cm.doc.height, bot + pixels + 50) }
updateDisplaySimple(cm, {top: top, bottom: bot})



  }


  }


  // FOCUS/BLUR EVENTS

function onFocus(cm) {
if (cm.options.readOnly == "nocursor") return;
if (!cm.state.focused) {
signal(cm, "focus", cm);
cm.state.focused = true;
addClass(cm.display.wrapper, "CodeMirror-focused");
// The prevInput test prevents this from firing when a context
// menu is closed (since the resetInput would kill the
// select-all detection hack)
if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
resetInput(cm);
if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730
}



  if (wheelSamples < 20) {
if (display.wheelStartX == null) {
display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop
display.wheelDX = dx; display.wheelDY = dy
setTimeout(function () {
if (display.wheelStartX == null) { return }
var movedX = scroll.scrollLeft - display.wheelStartX
var movedY = scroll.scrollTop - display.wheelStartY
var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
(movedX && display.wheelDX && movedX / display.wheelDX)
display.wheelStartX = display.wheelStartY = null
if (!sample) { return }
wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1)
++wheelSamples
}, 200)
} else {
display.wheelDX += dx; display.wheelDY += dy

    }

    }

    slowPoll(cm);
restartBlink(cm);

 
  }

  }

  function onBlur(cm) {
if (cm.state.focused) {
signal(cm, "blur", cm);
cm.state.focused = false;
rmClass(cm.display.wrapper, "CodeMirror-focused");
}
clearInterval(cm.display.blinker);
setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 150);















}

// Selection objects are immutable. A new one is created every time
// the selection changes. A selection is one or more non-overlapping
// (and non-touching) ranges, sorted, and an integer that indicates
// which one is the primary selection (the one that's scrolled into
// view, that getCursor returns, etc).
var Selection = function(ranges, primIndex) {
this.ranges = ranges
this.primIndex = primIndex
};

Selection.prototype.primary = function () { return this.ranges[this.primIndex] };

Selection.prototype.equals = function (other) {
var this$1 = this;

if (other == this) { return true }
if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
for (var i = 0; i < this.ranges.length; i++) {
var here = this$1.ranges[i], there = other.ranges[i]
if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }

  }

  }

 
  return true
};





  // CONTEXT MENU HANDLING


Selection.prototype.deepCopy = function () {
var this$1 = this;





  // To make the context menu work, we need to briefly unhide the
// textarea (making it as unobtrusive as possible) to let the
// right-click take effect on it.
function onContextMenu(cm, e) {
if (signalDOMEvent(cm, e, "contextmenu")) return;
var display = cm.display;
if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return;

  var out = []
for (var i = 0; i < this.ranges.length; i++)
{ out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)) }
return new Selection(out, this.primIndex)
};







    var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
if (!pos || presto) return; // Opera is difficult.

Selection.prototype.somethingSelected = function () {
var this$1 = this;





    // Reset the current text selection only if the click is done outside of the selection
// and 'resetSelectionOnContextMenu' option is true.
var reset = cm.options.resetSelectionOnContextMenu;
if (reset && cm.doc.sel.contains(pos) == -1)
operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll);

  for (var i = 0; i < this.ranges.length; i++)
{ if (!this$1.ranges[i].empty()) { return true } }
return false
};






    var oldCSS = display.input.style.cssText;
display.inputDiv.style.position = "absolute";
display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
"px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: " +
(ie ? "rgba(255, 255, 255, .05)" : "transparent") +
"; outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
if (webkit) var oldScrollY = window.scrollY; // Work around Chrome issue (#2712)
focusInput(cm);
if (webkit) window.scrollTo(null, oldScrollY);
resetInput(cm);
// Adds "Select all" to context menu in FF
if (!cm.somethingSelected()) display.input.value = display.prevInput = " ";
display.contextMenuPending = true;
display.selForContextMenu = cm.doc.sel;
clearTimeout(display.detectingSelectAll);

Selection.prototype.contains = function (pos, end) {
var this$1 = this;


















    // Select-all will be greyed out if there's nothing to select, so
// this adds a zero-width space so that we can later check whether
// it got selected.
function prepareSelectAllHack() {
if (display.input.selectionStart != null) {
var selected = cm.somethingSelected();
var extval = display.input.value = "\u200b" + (selected ? display.input.value : "");
display.prevInput = selected ? "" : "\u200b";
display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
// Re-set this, in case some other handler touched the
// selection in the meantime.
display.selForContextMenu = cm.doc.sel;
}
}
function rehide() {
display.contextMenuPending = false;
display.inputDiv.style.position = "relative";
display.input.style.cssText = oldCSS;
if (ie && ie_version < 9) display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos);
slowPoll(cm);

  if (!end) { end = pos }
for (var i = 0; i < this.ranges.length; i++) {
var range = this$1.ranges[i]
if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
{ return i }
}
return -1
};

















      // Try to detect the user choosing select-all
if (display.input.selectionStart != null) {
if (!ie || (ie && ie_version < 9)) prepareSelectAllHack();
var i = 0, poll = function() {
if (display.selForContextMenu == cm.doc.sel && display.input.selectionStart == 0)
operation(cm, commands.selectAll)(cm);
else if (i++ < 10) display.detectingSelectAll = setTimeout(poll, 500);
else resetInput(cm);
};
display.detectingSelectAll = setTimeout(poll, 200);
}
}

var Range = function(anchor, head) {
this.anchor = anchor; this.head = head
};














    if (ie && ie_version >= 9) prepareSelectAllHack();
if (captureRightClick) {
e_stop(e);
var mouseup = function() {
off(window, "mouseup", mouseup);
setTimeout(rehide, 20);
};
on(window, "mouseup", mouseup);
} else {
setTimeout(rehide, 50);









Range.prototype.from = function () { return minPos(this.anchor, this.head) };
Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };

// Take an unsorted, potentially overlapping set of ranges, and
// build a selection out of it. 'Consumes' ranges array (modifying
// it).
function normalizeSelection(ranges, primIndex) {
var prim = ranges[primIndex]
ranges.sort(function (a, b) { return cmp(a.from(), b.from()); })
primIndex = indexOf(ranges, prim)
for (var i = 1; i < ranges.length; i++) {
var cur = ranges[i], prev = ranges[i - 1]
if (cmp(prev.to(), cur.from()) >= 0) {
var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to())
var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head
if (i <= primIndex) { --primIndex }
ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to))

    }
}

    }
}

 
  return new Selection(ranges, primIndex)
}





  function contextMenuInGutter(cm, e) {
if (!hasHandler(cm, "gutterContextMenu")) return false;
return gutterEvent(cm, e, "gutterContextMenu", false, signal);
}

function simpleSelection(anchor, head) {
return new Selection([new Range(anchor, head || anchor)], 0)
}






  // UPDATING







// Compute the position of the end of a change (its 'to' property
// refers to the pre-change end).
function changeEnd(change) {
if (!change.text) { return change.to }
return Pos(change.from.line + change.text.length - 1,
lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
}





  // Compute the position of the end of a change (its 'to' property
// refers to the pre-change end).
var changeEnd = CodeMirror.changeEnd = function(change) {
if (!change.text) return change.to;
return Pos(change.from.line + change.text.length - 1,
lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0));
};

// Adjust a position to refer to the post-change position of the
// same text, or the end of the change if the change covers it.
function adjustForChange(pos, change) {
if (cmp(pos, change.from) < 0) { return pos }
if (cmp(pos, change.to) <= 0) { return changeEnd(change) }







  // Adjust a position to refer to the post-change position of the
// same text, or the end of the change if the change covers it.
function adjustForChange(pos, change) {
if (cmp(pos, change.from) < 0) return pos;
if (cmp(pos, change.to) <= 0) return changeEnd(change);

  var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch
if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch }
return Pos(line, ch)
}






    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch;
return Pos(line, ch);




function computeSelAfterChange(doc, change) {
var out = []
for (var i = 0; i < doc.sel.ranges.length; i++) {
var range = doc.sel.ranges[i]
out.push(new Range(adjustForChange(range.anchor, change),
adjustForChange(range.head, change)))

  }

  }

 
  return normalizeSelection(out, doc.sel.primIndex)
}





  function computeSelAfterChange(doc, change) {
var out = [];
for (var i = 0; i < doc.sel.ranges.length; i++) {
var range = doc.sel.ranges[i];
out.push(new Range(adjustForChange(range.anchor, change),
adjustForChange(range.head, change)));


















function offsetPos(pos, old, nw) {
if (pos.line == old.line)
{ return Pos(nw.line, pos.ch - old.ch + nw.ch) }
else
{ return Pos(nw.line + (pos.line - old.line), pos.ch) }
}

// Used by replaceSelections to allow moving the selection to the
// start or around the replaced test. Hint may be "start" or "around".
function computeReplacedSel(doc, changes, hint) {
var out = []
var oldPrev = Pos(doc.first, 0), newPrev = oldPrev
for (var i = 0; i < changes.length; i++) {
var change = changes[i]
var from = offsetPos(change.from, oldPrev, newPrev)
var to = offsetPos(changeEnd(change), oldPrev, newPrev)
oldPrev = change.to
newPrev = to
if (hint == "around") {
var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0
out[i] = new Range(inv ? to : from, inv ? from : to)
} else {
out[i] = new Range(from, from)

    }

    }

    return normalizeSelection(out, doc.sel.primIndex);

 
  }

  }

 
  return new Selection(out, doc.sel.primIndex)
}





  function offsetPos(pos, old, nw) {
if (pos.line == old.line)
return Pos(nw.line, pos.ch - old.ch + nw.ch);
else
return Pos(nw.line + (pos.line - old.line), pos.ch);




































// Used to get the editor into a consistent state again when options change.

function loadMode(cm) {
cm.doc.mode = getMode(cm.options, cm.doc.modeOption)
resetModeState(cm)
}

function resetModeState(cm) {
cm.doc.iter(function (line) {
if (line.stateAfter) { line.stateAfter = null }
if (line.styles) { line.styles = null }
})
cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first
startWorker(cm, 100)
cm.state.modeGen++
if (cm.curOp) { regChange(cm) }
}

// DOCUMENT DATA STRUCTURE

// By default, updates that start and end at the beginning of a line
// are treated specially, in order to make the association of line
// widgets and marker elements with the text behave more intuitive.
function isWholeLineUpdate(doc, change) {
return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
(!doc.cm || doc.cm.options.wholeLineUpdateBefore)
}

// Perform a change on the document data structure.
function updateDoc(doc, change, markedSpans, estimateHeight) {
function spansFor(n) {return markedSpans ? markedSpans[n] : null}
function update(line, text, spans) {
updateLine(line, text, spans, estimateHeight)
signalLater(line, "change", line, change)
}
function linesFor(start, end) {
var result = []
for (var i = start; i < end; ++i)
{ result.push(new Line(text[i], spansFor(i), estimateHeight)) }
return result

  }


  }


  // Used by replaceSelections to allow moving the selection to the
// start or around the replaced test. Hint may be "start" or "around".
function computeReplacedSel(doc, changes, hint) {
var out = [];
var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
for (var i = 0; i < changes.length; i++) {
var change = changes[i];
var from = offsetPos(change.from, oldPrev, newPrev);
var to = offsetPos(changeEnd(change), oldPrev, newPrev);
oldPrev = change.to;
newPrev = to;
if (hint == "around") {
var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
out[i] = new Range(inv ? to : from, inv ? from : to);
} else {
out[i] = new Range(from, from);
}







  var from = change.from, to = change.to, text = change.text
var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line)
var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line

// Adjust the line structure
if (change.full) {
doc.insert(0, linesFor(0, text.length))
doc.remove(text.length, doc.size - text.length)
} else if (isWholeLineUpdate(doc, change)) {
// This is a whole-line replace. Treated specially to make
// sure line objects move the way they are supposed to.
var added = linesFor(0, text.length - 1)
update(lastLine, lastLine.text, lastSpans)
if (nlines) { doc.remove(from.line, nlines) }
if (added.length) { doc.insert(from.line, added) }
} else if (firstLine == lastLine) {
if (text.length == 1) {
update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans)
} else {
var added$1 = linesFor(1, text.length - 1)
added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight))
update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
doc.insert(from.line + 1, added$1)

    }

    }

    return new Selection(out, doc.sel.primIndex);









  } else if (text.length == 1) {
update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0))
doc.remove(from.line + 1, nlines)
} else {
update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans)
var added$2 = linesFor(1, text.length - 1)
if (nlines > 1) { doc.remove(from.line + 1, nlines - 1) }
doc.insert(from.line + 1, added$2)

  }


  }


  // Allow "beforeChange" event handlers to influence a change
function filterChange(doc, change, update) {
var obj = {
canceled: false,
from: change.from,
to: change.to,
text: change.text,
origin: change.origin,
cancel: function() { this.canceled = true; }
};
if (update) obj.update = function(from, to, text, origin) {
if (from) this.from = clipPos(doc, from);
if (to) this.to = clipPos(doc, to);
if (text) this.text = text;
if (origin !== undefined) this.origin = origin;
};
signal(doc, "beforeChange", doc, obj);
if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);

  signalLater(doc, "change", doc, change)
}





















    if (obj.canceled) return null;
return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};










// Call f for all linked documents.
function linkedDocs(doc, f, sharedHistOnly) {
function propagate(doc, skip, sharedHist) {
if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
var rel = doc.linked[i]
if (rel.doc == skip) { continue }
var shared = sharedHist && rel.sharedHist
if (sharedHistOnly && !shared) { continue }
f(rel.doc, shared)
propagate(rel.doc, doc, shared)
} }

  }

  }

 
  propagate(doc, null, true)
}





  // Apply a change to a document, and add it to the document's
// history, and propagating it to all linked documents.
function makeChange(doc, change, ignoreReadOnly) {
if (doc.cm) {
if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly);
if (doc.cm.state.suppressEdits) return;
}






// Attach a document to an editor.
function attachDoc(cm, doc) {
if (doc.cm) { throw new Error("This document is already in use.") }
cm.doc = doc
doc.cm = cm
estimateLineHeights(cm)
loadMode(cm)
setDirectionClass(cm)
if (!cm.options.lineWrapping) { findMaxLine(cm) }
cm.options.mode = doc.modeOption
regChange(cm)
}





    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
change = filterChange(doc, change, true);
if (!change) return;
}

function setDirectionClass(cm) {
;(cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl")
}






    // Possibly split or suppress the update based on the presence
// of read-only spans in its range.
var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
if (split) {
for (var i = split.length - 1; i >= 0; --i)
makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text});
} else {
makeChangeInner(doc, change);
}
}

function directionChanged(cm) {
runInOp(cm, function () {
setDirectionClass(cm)
regChange(cm)
})
}









  function makeChangeInner(doc, change) {
if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) return;
var selAfter = computeSelAfterChange(doc, change);
addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);











function History(startGen) {
// Arrays of change events and selections. Doing something adds an
// event to done and clears undo. Undoing moves events from done
// to undone, redoing moves them in the other direction.
this.done = []; this.undone = []
this.undoDepth = Infinity
// Used to track when changes can be merged into a single undo
// event
this.lastModTime = this.lastSelTime = 0
this.lastOp = this.lastSelOp = null
this.lastOrigin = this.lastSelOrigin = null
// Used by the isClean() method
this.generation = this.maxGeneration = startGen || 1
}





    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
var rebased = [];







// Create a history change event from an updateDoc-style change
// object.
function historyChangeFromChange(doc, change) {
var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}
attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1)
linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true)
return histChange
}





    linkedDocs(doc, function(doc, sharedHist) {
if (!sharedHist && indexOf(rebased, doc.history) == -1) {
rebaseHist(doc.history, change);
rebased.push(doc.history);
}
makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
});

// Pop all selection events off the end of a history array. Stop at
// a change event.
function clearSelectionEvents(array) {
while (array.length) {
var last = lst(array)
if (last.ranges) { array.pop() }
else { break }

  }

  }

 
}





  // Revert a change stored in a document's history.
function makeChangeFromHistory(doc, type, allowSelectionOnly) {
if (doc.cm && doc.cm.state.suppressEdits) return;











// Find the top change event in the history. Pop off selection
// events that are in the way.
function lastChangeEvent(hist, force) {
if (force) {
clearSelectionEvents(hist.done)
return lst(hist.done)
} else if (hist.done.length && !lst(hist.done).ranges) {
return lst(hist.done)
} else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
hist.done.pop()
return lst(hist.done)
}
}





    var hist = doc.history, event, selAfter = doc.sel;
var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;







// Register a change in the history. Merges changes that are within
// a single operation, or are close together with an origin that
// allows merging (starting with "+") into a single event.
function addChangeToHistory(doc, change, selAfter, opId) {
var hist = doc.history
hist.undone.length = 0
var time = +new Date, cur
var last





    // Verify that there is a useable event (so that ctrl-z won't
// needlessly clear selection events)
for (var i = 0; i < source.length; i++) {
event = source[i];
if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
break;









  if ((hist.lastOp == opId ||
hist.lastOrigin == change.origin && change.origin &&
((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
change.origin.charAt(0) == "*")) &&
(cur = lastChangeEvent(hist, hist.lastOp == opId))) {
// Merge this change into the last event
last = lst(cur.changes)
if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
// Optimized case for simple insertion -- don't want to add
// new changesets for every character typed
last.to = changeEnd(change)
} else {
// Add new sub-event
cur.changes.push(historyChangeFromChange(doc, change))

    }

    }

    if (i == source.length) return;
hist.lastOrigin = hist.lastSelOrigin = null;

for (;;) {
event = source.pop();
if (event.ranges) {
pushSelectionToHistory(event, dest);
if (allowSelectionOnly && !event.equals(doc.sel)) {
setSelection(doc, event, {clearRedo: false});
return;
}
selAfter = event;
}
else break;

  } else {
// Can not be merged, start a new event.
var before = lst(hist.done)
if (!before || !before.ranges)
{ pushSelectionToHistory(doc.sel, hist.done) }
cur = {changes: [historyChangeFromChange(doc, change)],
generation: hist.generation}
hist.done.push(cur)
while (hist.done.length > hist.undoDepth) {
hist.done.shift()
if (!hist.done[0].ranges) { hist.done.shift() }




    }

    }

 
  }
hist.done.push(selAfter)
hist.generation = ++hist.maxGeneration
hist.lastModTime = hist.lastSelTime = time
hist.lastOp = hist.lastSelOp = opId
hist.lastOrigin = hist.lastSelOrigin = change.origin





    // Build up a reverse change object to add to the opposite history
// stack (redo when undoing, and vice versa).
var antiChanges = [];
pushSelectionToHistory(selAfter, dest);
dest.push({changes: antiChanges, generation: hist.generation});
hist.generation = event.generation || ++hist.maxGeneration;

  if (!last) { signal(doc, "historyAdded") }
}









    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");








function selectionEventCanBeMerged(doc, origin, prev, sel) {
var ch = origin.charAt(0)
return ch == "*" ||
ch == "+" &&
prev.ranges.length == sel.ranges.length &&
prev.somethingSelected() == sel.somethingSelected() &&
new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
}





    for (var i = event.changes.length - 1; i >= 0; --i) {
var change = event.changes[i];
change.origin = type;
if (filter && !filterChange(doc, change, false)) {
source.length = 0;
return;
}

// Called whenever the selection changes, sets the new selection as
// the pending selection in the history, and pushes the old pending
// selection into the 'done' array when it was significantly
// different (in number of selected ranges, emptiness, or time).
function addSelectionToHistory(doc, sel, opId, options) {
var hist = doc.history, origin = options && options.origin






      antiChanges.push(historyChangeFromChange(doc, change));











  // A new event is started when the previous origin does not match
// the current, or the origins don't allow matching. Origins
// starting with * are always merged, those starting with + are
// merged when similar and close together in time.
if (opId == hist.lastSelOp ||
(origin && hist.lastSelOrigin == origin &&
(hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
{ hist.done[hist.done.length - 1] = sel }
else
{ pushSelectionToHistory(sel, hist.done) }





      var after = i ? computeSelAfterChange(doc, change) : lst(source);
makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
if (!i && doc.cm) doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)});
var rebased = [];



  hist.lastSelTime = +new Date
hist.lastSelOrigin = origin
hist.lastSelOp = opId
if (options && options.clearRedo !== false)
{ clearSelectionEvents(hist.undone) }
}





      // Propagate to the linked documents
linkedDocs(doc, function(doc, sharedHist) {
if (!sharedHist && indexOf(rebased, doc.history) == -1) {
rebaseHist(doc.history, change);
rebased.push(doc.history);
}
makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
});
}
}

function pushSelectionToHistory(sel, dest) {
var top = lst(dest)
if (!(top && top.ranges && top.equals(sel)))
{ dest.push(sel) }
}










  // Sub-views need their line numbers shifted when text is added
// above or below them in the parent document.
function shiftDoc(doc, distance) {
if (distance == 0) return;
doc.first += distance;
doc.sel = new Selection(map(doc.sel.ranges, function(range) {
return new Range(Pos(range.anchor.line + distance, range.anchor.ch),
Pos(range.head.line + distance, range.head.ch));
}), doc.sel.primIndex);
if (doc.cm) {
regChange(doc.cm, doc.first, doc.first - distance, distance);
for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
regLineChange(doc.cm, l, "gutter");
}





// Used to store marked span information in the history.
function attachLocalSpans(doc, change, from, to) {
var existing = change["spans_" + doc.id], n = 0
doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
if (line.markedSpans)
{ (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans }
++n
})
}

// When un/re-doing restores text containing marked spans, those
// that have been explicitly cleared should not be restored.
function removeClearedSpans(spans) {
if (!spans) { return null }
var out
for (var i = 0; i < spans.length; ++i) {
if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i) } }
else if (out) { out.push(spans[i]) }

  }

  }

 
  return !out ? spans : out.length ? out : null
}





  // More lower-level change function, handling only a single document
// (not linked ones).
function makeChangeSingleDoc(doc, change, selAfter, spans) {
if (doc.cm && !doc.cm.curOp)
return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);





// Retrieve and filter the old marked spans stored in a change event.
function getOldSpans(doc, change) {
var found = change["spans_" + doc.id]
if (!found) { return null }
var nw = []
for (var i = 0; i < change.text.length; ++i)
{ nw.push(removeClearedSpans(found[i])) }
return nw
}





    if (change.to.line < doc.first) {
shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
return;



















// Used for un/re-doing changes from the history. Combines the
// result of computing the existing spans with the set of spans that
// existed in the history (so that deleting around a span and then
// undoing brings back the span).
function mergeOldSpans(doc, change) {
var old = getOldSpans(doc, change)
var stretched = stretchSpansOverChange(doc, change)
if (!old) { return stretched }
if (!stretched) { return old }

for (var i = 0; i < old.length; ++i) {
var oldCur = old[i], stretchCur = stretched[i]
if (oldCur && stretchCur) {
spans: for (var j = 0; j < stretchCur.length; ++j) {
var span = stretchCur[j]
for (var k = 0; k < oldCur.length; ++k)
{ if (oldCur[k].marker == span.marker) { continue spans } }
oldCur.push(span)
}
} else if (stretchCur) {
old[i] = stretchCur

    }

    }

    if (change.from.line > doc.lastLine()) return;



  }
return old
}





    // Clip the change to the size of this doc
if (change.from.line < doc.first) {
var shift = change.text.length - 1 - (doc.first - change.from.line);
shiftDoc(doc, shift);
change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
text: [lst(change.text)], origin: change.origin};




// Used both to provide a JSON-safe object in .getHistory, and, when
// detaching a document, to split the history in two
function copyHistoryArray(events, newGroup, instantiateSel) {
var copy = []
for (var i = 0; i < events.length; ++i) {
var event = events[i]
if (event.ranges) {
copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event)
continue

    }

    }

    var last = doc.lastLine();
if (change.to.line > last) {
change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
text: [change.text[0]], origin: change.origin};








    var changes = event.changes, newChanges = []
copy.push({changes: newChanges})
for (var j = 0; j < changes.length; ++j) {
var change = changes[j], m = (void 0)
newChanges.push({from: change.from, to: change.to, text: change.text})
if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
if (indexOf(newGroup, Number(m[1])) > -1) {
lst(newChanges)[prop] = change[prop]
delete change[prop]
}
} } }

    }

    }


change.removed = getBetween(doc, change.from, change.to);

if (!selAfter) selAfter = computeSelAfterChange(doc, change);
if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans);
else updateDoc(doc, change, spans);
setSelectionNoUndo(doc, selAfter, sel_dontScroll);

 
  }

  }

 
  return copy
}





  // Handle the interaction of a change to a document with the editor
// that this document is part of.
function makeChangeSingleDocInEditor(cm, change, spans) {
var doc = cm.doc, display = cm.display, from = change.from, to = change.to;

// The 'scroll' parameter given to many of these indicated whether
// the new cursor position should be scrolled into view after
// modifying the selection.






    var recomputeMaxLength = false, checkWidthStart = from.line;
if (!cm.options.lineWrapping) {
checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
doc.iter(checkWidthStart, to.line + 1, function(line) {
if (line == display.maxLine) {
recomputeMaxLength = true;
return true;
}
});







// If shift is held or the extend flag is set, extends a range to
// include a given position (and optionally a second position).
// Otherwise, simply returns the range between the given positions.
// Used for cursor motion and such.
function extendRange(range, head, other, extend) {
if (extend) {
var anchor = range.anchor
if (other) {
var posBefore = cmp(head, anchor) < 0
if (posBefore != (cmp(other, anchor) < 0)) {
anchor = head
head = other
} else if (posBefore != (cmp(head, other) < 0)) {
head = other
}

    }

    }

 
    return new Range(anchor, head)
} else {
return new Range(other || head, head)
}
}





    if (doc.sel.contains(change.from, change.to) > -1)
signalCursorActivity(cm);




// Extend the primary selection range, discard the rest.
function extendSelection(doc, head, other, options, extend) {
if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend) }
setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options)
}





    updateDoc(doc, change, spans, estimateHeight(cm));










// Extend all selections (pos is an array of selections with length
// equal the number of selections)
function extendSelections(doc, heads, options) {
var out = []
var extend = doc.cm && (doc.cm.display.shift || doc.extend)
for (var i = 0; i < doc.sel.ranges.length; i++)
{ out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend) }
var newSel = normalizeSelection(out, doc.sel.primIndex)
setSelection(doc, newSel, options)
}





    if (!cm.options.lineWrapping) {
doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
var len = lineLength(line);
if (len > display.maxLineLength) {
display.maxLine = line;
display.maxLineLength = len;
display.maxLineChanged = true;
recomputeMaxLength = false;
}
});
if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
}

// Updates a single range in the selection.
function replaceOneSelection(doc, i, range, options) {
var ranges = doc.sel.ranges.slice(0)
ranges[i] = range
setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options)
}











    // Adjust frontier, schedule worker
doc.frontier = Math.min(doc.frontier, from.line);
startWorker(cm, 400);


// Reset the selection to a single range.
function setSimpleSelection(doc, anchor, head, options) {
setSelection(doc, simpleSelection(anchor, head), options)
}





    var lendiff = change.text.length - (to.line - from.line) - 1;
// Remember that these lines changed, for updating the display
if (change.full)
regChange(cm);
else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
regLineChange(cm, from.line, "text");
else
regChange(cm, from.line, to.line + 1, lendiff);

// Give beforeSelectionChange handlers a change to influence a
// selection update.
function filterSelectionChange(doc, sel, options) {
var obj = {
ranges: sel.ranges,
update: function(ranges) {
var this$1 = this;






    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
if (changeHandler || changesHandler) {
var obj = {
from: from, to: to,
text: change.text,
removed: change.removed,
origin: change.origin
};
if (changeHandler) signalLater(cm, "change", cm, obj);
if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj);
}
cm.display.selForContextMenu = null;

      this.ranges = []
for (var i = 0; i < ranges.length; i++)
{ this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
clipPos(doc, ranges[i].head)) }
},
origin: options && options.origin







  }

  }

 
  signal(doc, "beforeSelectionChange", doc, obj)
if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj) }
if (obj.ranges != sel.ranges) { return normalizeSelection(obj.ranges, obj.ranges.length - 1) }
else { return sel }
}





  function replaceRange(doc, code, from, to, origin) {
if (!to) to = from;
if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; }
if (typeof code == "string") code = splitLines(code);
makeChange(doc, {from: from, to: to, text: code, origin: origin});



function setSelectionReplaceHistory(doc, sel, options) {
var done = doc.history.done, last = lst(done)
if (last && last.ranges) {
done[done.length - 1] = sel
setSelectionNoUndo(doc, sel, options)
} else {
setSelection(doc, sel, options)

  }

  }

 
}





  // SCROLLING THINGS INTO VIEW





// Set a new selection.
function setSelection(doc, sel, options) {
setSelectionNoUndo(doc, sel, options)
addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)
}





  // If an editor sits on the top or bottom of the window, partially
// scrolled out of view, this ensures that the cursor is visible.
function maybeScrollWindow(cm, coords) {
if (signalDOMEvent(cm, "scrollCursorIntoView")) return;

function setSelectionNoUndo(doc, sel, options) {
if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
{ sel = filterSelectionChange(doc, sel, options) }






    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
if (coords.top + box.top < 0) doScroll = true;
else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
if (doScroll != null && !phantom) {
var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
(coords.top - display.viewOffset - paddingTop(cm.display)) + "px; height: " +
(coords.bottom - coords.top + scrollGap(cm) + display.barHeight) + "px; left: " +
coords.left + "px; width: 2px;");
cm.display.lineSpace.appendChild(scrollNode);
scrollNode.scrollIntoView(doScroll);
cm.display.lineSpace.removeChild(scrollNode);




























  var bias = options && options.bias ||
(cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1)
setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true))

if (!(options && options.scroll === false) && doc.cm)
{ ensureCursorVisible(doc.cm) }
}

function setSelectionInner(doc, sel) {
if (sel.equals(doc.sel)) { return }

doc.sel = sel

if (doc.cm) {
doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true
signalCursorActivity(doc.cm)
}
signalLater(doc, "cursorActivity", doc)
}

// Verify that the selection does not partially select any atomic
// marked ranges.
function reCheckSelection(doc) {
setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false))
}

// Return a selection that does not partially select any atomic
// ranges.
function skipAtomicInSelection(doc, sel, bias, mayClear) {
var out
for (var i = 0; i < sel.ranges.length; i++) {
var range = sel.ranges[i]
var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]
var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear)
var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear)
if (out || newAnchor != range.anchor || newHead != range.head) {
if (!out) { out = sel.ranges.slice(0, i) }
out[i] = new Range(newAnchor, newHead)

    }
}

    }
}

 
  return out ? normalizeSelection(out, sel.primIndex) : sel
}





  // Scroll a given position into view (immediately), verifying that
// it actually became visible (as line heights are accurately
// measured, the position of something may 'drift' during drawing).
function scrollPosIntoView(cm, pos, end, margin) {
if (margin == null) margin = 0;
for (var limit = 0; limit < 5; limit++) {
var changed = false, coords = cursorCoords(cm, pos);
var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
Math.min(coords.top, endCoords.top) - margin,
Math.max(coords.left, endCoords.left),
Math.max(coords.bottom, endCoords.bottom) + margin);
var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
if (scrollPos.scrollTop != null) {
setScrollTop(cm, scrollPos.scrollTop);
if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;

function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
var line = getLine(doc, pos.line)
if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
var sp = line.markedSpans[i], m = sp.marker
if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
(sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
if (mayClear) {
signal(m, "beforeCursorEnter")
if (m.explicitlyCleared) {
if (!line.markedSpans) { break }
else {--i; continue}
}





      }

      }

      if (scrollPos.scrollLeft != null) {
setScrollLeft(cm, scrollPos.scrollLeft);
if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;






      if (!m.atomic) { continue }

if (oldPos) {
var near = m.find(dir < 0 ? 1 : -1), diff = (void 0)
if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft)
{ near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null) }
if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
{ return skipAtomicInner(doc, near, pos, dir, mayClear) }

      }

      }

      if (!changed) break;






var far = m.find(dir < 0 ? -1 : 1)
if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight)
{ far = movePos(doc, far, dir, far.line == pos.line ? line : null) }
return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null

    }

    }

    return coords;














  } }
return pos
}

// Ensure a given position is not inside an atomic range.
function skipAtomic(doc, pos, oldPos, bias, mayClear) {
var dir = bias || 1
var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
(!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
(!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true))
if (!found) {
doc.cantEdit = true
return Pos(doc.first, 0)

  }

  }

 
  return found
}





  // Scroll a given set of coordinates into view (immediately).
function scrollIntoView(cm, x1, y1, x2, y2) {
var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);





function movePos(doc, pos, dir, line) {
if (dir < 0 && pos.ch == 0) {
if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
else { return null }
} else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
else { return null }
} else {
return new Pos(pos.line, pos.ch + dir)

  }

  }

 
}





  // Calculate a new scroll position needed to scroll the given
// rectangle into view. Returns an object with scrollTop and
// scrollLeft properties. When these are undefined, the
// vertical/horizontal position does not need to be adjusted.
function calculateScrollPos(cm, x1, y1, x2, y2) {
var display = cm.display, snapMargin = textHeight(cm.display);
if (y1 < 0) y1 = 0;
var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
var screen = displayHeight(cm), result = {};
if (y2 - y1 > screen) y2 = y1 + screen;
var docBottom = cm.doc.height + paddingVert(display);
var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
if (y1 < screentop) {
result.scrollTop = atTop ? 0 : y1;
} else if (y2 > screentop + screen) {
var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
if (newTop != screentop) result.scrollTop = newTop;
}

function selectAll(cm) {
cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll)
}

// UPDATING


















    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
var tooWide = x2 - x1 > screenw;
if (tooWide) x2 = x1 + screenw;
if (x1 < 10)
result.scrollLeft = 0;
else if (x1 < screenleft)
result.scrollLeft = Math.max(0, x1 - (tooWide ? 0 : 10));
else if (x2 > screenw + screenleft - 3)
result.scrollLeft = x2 + (tooWide ? 0 : 10) - screenw;
return result;

// Allow "beforeChange" event handlers to influence a change
function filterChange(doc, change, update) {
var obj = {
canceled: false,
from: change.from,
to: change.to,
text: change.text,
origin: change.origin,
cancel: function () { return obj.canceled = true; }



  }

  }

 
  if (update) { obj.update = function (from, to, text, origin) {
if (from) { obj.from = clipPos(doc, from) }
if (to) { obj.to = clipPos(doc, to) }
if (text) { obj.text = text }
if (origin !== undefined) { obj.origin = origin }
} }
signal(doc, "beforeChange", doc, obj)
if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj) }





  // Store a relative adjustment to the scroll position in the current
// operation (to be applied when the operation finishes).
function addToScrollPos(cm, left, top) {
if (left != null || top != null) resolveScrollToPos(cm);
if (left != null)
cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : cm.curOp.scrollLeft) + left;
if (top != null)
cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;



  if (obj.canceled) { return null }
return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
}

// Apply a change to a document, and add it to the document's
// history, and propagating it to all linked documents.
function makeChange(doc, change, ignoreReadOnly) {
if (doc.cm) {
if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
if (doc.cm.state.suppressEdits) { return }

  }


  }


  // Make sure that at the end of the operation the current cursor is
// shown.
function ensureCursorVisible(cm) {
resolveScrollToPos(cm);
var cur = cm.getCursor(), from = cur, to = cur;
if (!cm.options.lineWrapping) {
from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur;
to = Pos(cur.line, cur.ch + 1);
}
cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollMargin, isCursor: true};

  if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
change = filterChange(doc, change, true)
if (!change) { return }








  }


  }


  // When an operation has its scrollToPos property set, and another
// scroll action is applied before the end of the operation, this
// 'simulates' scrolling that position into view in a cheap way, so
// that the effect of intermediate scroll commands is not ignored.
function resolveScrollToPos(cm) {
var range = cm.curOp.scrollToPos;
if (range) {
cm.curOp.scrollToPos = null;
var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
var sPos = calculateScrollPos(cm, Math.min(from.left, to.left),
Math.min(from.top, to.top) - range.margin,
Math.max(from.right, to.right),
Math.max(from.bottom, to.bottom) + range.margin);
cm.scrollTo(sPos.scrollLeft, sPos.scrollTop);
}

  // Possibly split or suppress the update based on the presence
// of read-only spans in its range.
var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to)
if (split) {
for (var i = split.length - 1; i >= 0; --i)
{ makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}) }
} else {
makeChangeInner(doc, change)








  }

  }

 
}





  // API UTILITIES




function makeChangeInner(doc, change) {
if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
var selAfter = computeSelAfterChange(doc, change)
addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN)





  // Indent the given line. The how parameter can be "smart",
// "add"/null, "subtract", or "prev". When aggressive is false
// (typically set to true for forced single-line indents), empty
// lines are not indented, and places where the mode returns Pass
// are left alone.
function indentLine(cm, n, how, aggressive) {
var doc = cm.doc, state;
if (how == null) how = "add";
if (how == "smart") {
// Fall back to "prev" when the mode doesn't have an indentation
// method.
if (!doc.mode.indent) how = "prev";
else state = getStateBefore(cm, n);
}

  makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change))
var rebased = []

















    var tabSize = cm.options.tabSize;
var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
if (line.stateAfter) line.stateAfter = null;
var curSpaceString = line.text.match(/^\s*/)[0], indentation;
if (!aggressive && !/\S/.test(line.text)) {
indentation = 0;
how = "not";
} else if (how == "smart") {
indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
if (indentation == Pass || indentation > 150) {
if (!aggressive) return;
how = "prev";
}
}
if (how == "prev") {
if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
else indentation = 0;
} else if (how == "add") {
indentation = curSpace + cm.options.indentUnit;
} else if (how == "subtract") {
indentation = curSpace - cm.options.indentUnit;
} else if (typeof how == "number") {
indentation = curSpace + how;

  linkedDocs(doc, function (doc, sharedHist) {
if (!sharedHist && indexOf(rebased, doc.history) == -1) {
rebaseHist(doc.history, change)
rebased.push(doc.history)




















    }

    }

    indentation = Math.max(0, indentation);



    makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change))
})
}





    var indentString = "", pos = 0;
if (cm.options.indentWithTabs)
for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
if (pos < indentation) indentString += spaceStr(indentation - pos);

// Revert a change stored in a document's history.
function makeChangeFromHistory(doc, type, allowSelectionOnly) {
if (doc.cm && doc.cm.state.suppressEdits && !allowSelectionOnly) { return }






    if (indentString != curSpaceString) {
replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
} else {
// Ensure that, if the cursor was in the whitespace at the start
// of the line, it is moved to the end of that space.
for (var i = 0; i < doc.sel.ranges.length; i++) {
var range = doc.sel.ranges[i];
if (range.head.line == n && range.head.ch < curSpaceString.length) {
var pos = Pos(n, curSpaceString.length);
replaceOneSelection(doc, i, new Range(pos, pos));
break;
}
}
}
line.stateAfter = null;
}

  var hist = doc.history, event, selAfter = doc.sel
var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done



















  // Utility for applying a change to a line by handle or number,
// returning the number and optionally registering the line as
// changed.
function changeLine(doc, handle, changeType, op) {
var no = handle, line = handle;
if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
else no = lineNo(handle);
if (no == null) return null;
if (op(line, no) && doc.cm) regLineChange(doc.cm, no, changeType);
return line;

  // Verify that there is a useable event (so that ctrl-z won't
// needlessly clear selection events)
var i = 0
for (; i < source.length; i++) {
event = source[i]
if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
{ break }




  }

  }

 
  if (i == source.length) { return }
hist.lastOrigin = hist.lastSelOrigin = null





  // Helper for deleting text near the selection(s), used to implement
// backspace, delete, and similar functionality.
function deleteNearSelection(cm, compute) {
var ranges = cm.doc.sel.ranges, kill = [];
// Build up a set of ranges to kill first, merging overlapping
// ranges.
for (var i = 0; i < ranges.length; i++) {
var toKill = compute(ranges[i]);
while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
var replaced = kill.pop();
if (cmp(replaced.from, toKill.from) < 0) {
toKill.from = replaced.from;
break;
}

  for (;;) {
event = source.pop()
if (event.ranges) {
pushSelectionToHistory(event, dest)
if (allowSelectionOnly && !event.equals(doc.sel)) {
setSelection(doc, event, {clearRedo: false})
return








      }

      }

      kill.push(toKill);

      selAfter = event

    }

    }

    // Next, remove those actual ranges.
runInOp(cm, function() {
for (var i = kill.length - 1; i >= 0; i--)
replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete");
ensureCursorVisible(cm);
});

    else { break }






  }


  }


  // Used for horizontal relative motion. Dir is -1 or 1 (left or
// right), unit can be "char", "column" (like char, but doesn't
// cross line boundaries), "word" (across next word), or "group" (to
// the start of next group of word or non-word-non-whitespace
// chars). The visually param controls whether, in right-to-left
// text, direction 1 means to move towards the next index in the
// string, or towards the character to the right of the current
// position. The resulting position will have a hitSide=true
// property if it reached the end of the document.
function findPosH(doc, pos, dir, unit, visually) {
var line = pos.line, ch = pos.ch, origDir = dir;
var lineObj = getLine(doc, line);
var possible = true;
function findNextLine() {
var l = line + dir;
if (l < doc.first || l >= doc.first + doc.size) return (possible = false);
line = l;
return lineObj = getLine(doc, l);
}
function moveOnce(boundToLine) {
var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
if (next == null) {
if (!boundToLine && findNextLine()) {
if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
else ch = dir < 0 ? lineObj.text.length : 0;
} else return (possible = false);
} else ch = next;
return true;

  // Build up a reverse change object to add to the opposite history
// stack (redo when undoing, and vice versa).
var antiChanges = []
pushSelectionToHistory(selAfter, dest)
dest.push({changes: antiChanges, generation: hist.generation})
hist.generation = event.generation || ++hist.maxGeneration

var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")

var loop = function ( i ) {
var change = event.changes[i]
change.origin = type
if (filter && !filterChange(doc, change, false)) {
source.length = 0
return {}














    }


    }


    if (unit == "char") moveOnce();
else if (unit == "column") moveOnce(true);
else if (unit == "word" || unit == "group") {
var sawType = null, group = unit == "group";
var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
for (var first = true;; first = false) {
if (dir < 0 && !moveOnce(!first)) break;
var cur = lineObj.text.charAt(ch) || "\n";
var type = isWordChar(cur, helper) ? "w"
: group && cur == "\n" ? "n"
: !group || /\s/.test(cur) ? null
: "p";
if (group && !first && !type) type = "s";
if (sawType && sawType != type) {
if (dir < 0) {dir = 1; moveOnce();}
break;
}

    antiChanges.push(historyChangeFromChange(doc, change))

var after = i ? computeSelAfterChange(doc, change) : lst(source)
makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change))
if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}) }
var rebased = []
















        if (type) sawType = type;
if (dir > 0 && !moveOnce(!first)) break;




    // Propagate to the linked documents
linkedDocs(doc, function (doc, sharedHist) {
if (!sharedHist && indexOf(rebased, doc.history) == -1) {
rebaseHist(doc.history, change)
rebased.push(doc.history)

      }

      }

    }
var result = skipAtomic(doc, Pos(line, ch), origDir, true);
if (!possible) result.hitSide = true;
return result;





      makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change))
})
};

for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
var returned = loop( i$1 );

if ( returned ) return returned.v;

  }

  }

 
}





  // For relative vertical movement. Dir may be -1 or 1. Unit can be
// "page" or "line". The resulting position will have a hitSide=true
// property if it reached the end of the document.
function findPosV(cm, pos, dir, unit) {
var doc = cm.doc, x = pos.left, y;
if (unit == "page") {
var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
} else if (unit == "line") {
y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
}
for (;;) {
var target = coordsChar(cm, x, y);
if (!target.outside) break;
if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
y += dir * 5;
}
return target;

// Sub-views need their line numbers shifted when text is added
// above or below them in the parent document.
function shiftDoc(doc, distance) {
if (distance == 0) { return }
doc.first += distance
doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
Pos(range.anchor.line + distance, range.anchor.ch),
Pos(range.head.line + distance, range.head.ch)
); }), doc.sel.primIndex)
if (doc.cm) {
regChange(doc.cm, doc.first, doc.first - distance, distance)
for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
{ regLineChange(doc.cm, l, "gutter") }






  }

  }

 
}





  // EDITOR METHODS





// More lower-level change function, handling only a single document
// (not linked ones).
function makeChangeSingleDoc(doc, change, selAfter, spans) {
if (doc.cm && !doc.cm.curOp)
{ return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }





  // The publicly visible API. Note that methodOp(f) means
// 'wrap f in an operation, performed on its `this` parameter'.




  if (change.to.line < doc.first) {
shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line))
return
}
if (change.from.line > doc.lastLine()) { return }





  // This is not the complete set of editor methods. Most of the
// methods defined on the Doc type are also injected into
// CodeMirror.prototype, for backwards compatibility and
// convenience.









  // Clip the change to the size of this doc
if (change.from.line < doc.first) {
var shift = change.text.length - 1 - (doc.first - change.from.line)
shiftDoc(doc, shift)
change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
text: [lst(change.text)], origin: change.origin}
}
var last = doc.lastLine()
if (change.to.line > last) {
change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
text: [change.text[0]], origin: change.origin}
}





  CodeMirror.prototype = {
constructor: CodeMirror,
focus: function(){window.focus(); focusInput(this); fastPoll(this);},

  change.removed = getBetween(doc, change.from, change.to)







    setOption: function(option, value) {
var options = this.options, old = options[option];
if (options[option] == value && option != "mode") return;
options[option] = value;
if (optionHandlers.hasOwnProperty(option))
operation(this, optionHandlers[option])(this, value, old);
},

  if (!selAfter) { selAfter = computeSelAfterChange(doc, change) }
if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans) }
else { updateDoc(doc, change, spans) }
setSelectionNoUndo(doc, selAfter, sel_dontScroll)
}







    getOption: function(option) {return this.options[option];},
getDoc: function() {return this.doc;},



// Handle the interaction of a change to a document with the editor
// that this document is part of.
function makeChangeSingleDocInEditor(cm, change, spans) {
var doc = cm.doc, display = cm.display, from = change.from, to = change.to





    addKeyMap: function(map, bottom) {
this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
},
removeKeyMap: function(map) {
var maps = this.state.keyMaps;
for (var i = 0; i < maps.length; ++i)
if (maps[i] == map || maps[i].name == map) {
maps.splice(i, 1);
return true;
}
},

addOverlay: methodOp(function(spec, options) {
var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
if (mode.startState) throw new Error("Overlays may not be stateful.");
this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
this.state.modeGen++;
regChange(this);
}),
removeOverlay: methodOp(function(spec) {
var overlays = this.state.overlays;
for (var i = 0; i < overlays.length; ++i) {
var cur = overlays[i].modeSpec;
if (cur == spec || typeof spec == "string" && cur.name == spec) {
overlays.splice(i, 1);
this.state.modeGen++;
regChange(this);
return;
}

  var recomputeMaxLength = false, checkWidthStart = from.line
if (!cm.options.lineWrapping) {
checkWidthStart = lineNo(visualLine(getLine(doc, from.line)))
doc.iter(checkWidthStart, to.line + 1, function (line) {
if (line == display.maxLine) {
recomputeMaxLength = true
return true























      }

      }

    }),


    })
}





    indentLine: methodOp(function(n, dir, aggressive) {
if (typeof dir != "string" && typeof dir != "number") {
if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
else dir = dir ? "add" : "subtract";
}
if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
}),
indentSelection: methodOp(function(how) {
var ranges = this.doc.sel.ranges, end = -1;
for (var i = 0; i < ranges.length; i++) {
var range = ranges[i];
if (!range.empty()) {
var from = range.from(), to = range.to();
var start = Math.max(end, from.line);
end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
for (var j = start; j < end; ++j)
indentLine(this, j, how);
var newRanges = this.doc.sel.ranges;
if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll);
} else if (range.head.line > end) {
indentLine(this, range.head.line, how, true);
end = range.head.line;
if (i == this.doc.sel.primIndex) ensureCursorVisible(this);
}
}
}),

  if (doc.sel.contains(change.from, change.to) > -1)
{ signalCursorActivity(cm) }






























    // Fetch the parser token for a given character. Useful for hacks
// that want to inspect the mode state (say, for completion).
getTokenAt: function(pos, precise) {
return takeToken(this, pos, precise);
},

  updateDoc(doc, change, spans, estimateHeight(cm))









    getLineTokens: function(line, precise) {
return takeToken(this, Pos(line), precise, true);
},

getTokenTypeAt: function(pos) {
pos = clipPos(this.doc, pos);
var styles = getLineStyles(this, getLine(this.doc, pos.line));
var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
var type;
if (ch == 0) type = styles[2];
else for (;;) {
var mid = (before + after) >> 1;
if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
else if (styles[mid * 2 + 1] < ch) before = mid + 1;
else { type = styles[mid * 2 + 2]; break; }

  if (!cm.options.lineWrapping) {
doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
var len = lineLength(line)
if (len > display.maxLineLength) {
display.maxLine = line
display.maxLineLength = len
display.maxLineChanged = true
recomputeMaxLength = false








      }

      }

      var cut = type ? type.indexOf("cm-overlay ") : -1;
return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1);
},

    })
if (recomputeMaxLength) { cm.curOp.updateMaxLine = true }
}





    getModeAt: function(pos) {
var mode = this.doc.mode;
if (!mode.innerMode) return mode;
return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
},

  retreatFrontier(doc, from.line)
startWorker(cm, 400)








    getHelper: function(pos, type) {
return this.getHelpers(pos, type)[0];
},






  var lendiff = change.text.length - (to.line - from.line) - 1
// Remember that these lines changed, for updating the display
if (change.full)
{ regChange(cm) }
else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
{ regLineChange(cm, from.line, "text") }
else
{ regChange(cm, from.line, to.line + 1, lendiff) }





    getHelpers: function(pos, type) {
var found = [];
if (!helpers.hasOwnProperty(type)) return helpers;
var help = helpers[type], mode = this.getModeAt(pos);
if (typeof mode[type] == "string") {
if (help[mode[type]]) found.push(help[mode[type]]);
} else if (mode[type]) {
for (var i = 0; i < mode[type].length; i++) {
var val = help[mode[type][i]];
if (val) found.push(val);
}
} else if (mode.helperType && help[mode.helperType]) {
found.push(help[mode.helperType]);
} else if (help[mode.name]) {
found.push(help[mode.name]);
}
for (var i = 0; i < help._global.length; i++) {
var cur = help._global[i];
if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
found.push(cur.val);
}
return found;
},

  var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change")
if (changeHandler || changesHandler) {
var obj = {
from: from, to: to,
text: change.text,
removed: change.removed,
origin: change.origin
}
if (changeHandler) { signalLater(cm, "change", cm, obj) }
if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj) }
}
cm.display.selForContextMenu = null
}















    getStateAfter: function(line, precise) {
var doc = this.doc;
line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
return getStateBefore(this, line + 1, precise);
},



function replaceRange(doc, code, from, to, origin) {
if (!to) { to = from }
if (cmp(to, from) < 0) { var assign;
(assign = [to, from], from = assign[0], to = assign[1], assign) }
if (typeof code == "string") { code = doc.splitLines(code) }
makeChange(doc, {from: from, to: to, text: code, origin: origin})
}





    cursorCoords: function(start, mode) {
var pos, range = this.doc.sel.primary();
if (start == null) pos = range.head;
else if (typeof start == "object") pos = clipPos(this.doc, start);
else pos = start ? range.from() : range.to();
return cursorCoords(this, pos, mode || "page");
},

// Rebasing/resetting history to deal with externally-sourced changes











    charCoords: function(pos, mode) {
return charCoords(this, clipPos(this.doc, pos), mode || "page");
},






function rebaseHistSelSingle(pos, from, to, diff) {
if (to < pos.line) {
pos.line += diff
} else if (from < pos.line) {
pos.line = from
pos.ch = 0
}
}





    coordsChar: function(coords, mode) {
coords = fromCoordSystem(this, coords, mode || "page");
return coordsChar(this, coords.left, coords.top);
},































// Tries to rebase an array of history events given a change in the
// document. If the change touches the same lines as the event, the
// event, and everything 'behind' it, is discarded. If the change is
// before the event, the event's positions are updated. Uses a
// copy-on-write scheme for the positions, to avoid having to
// reallocate them all on every rebase, but also avoid problems with
// shared position objects being unsafely updated.
function rebaseHistArray(array, from, to, diff) {
for (var i = 0; i < array.length; ++i) {
var sub = array[i], ok = true
if (sub.ranges) {
if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true }
for (var j = 0; j < sub.ranges.length; j++) {
rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff)
rebaseHistSelSingle(sub.ranges[j].head, from, to, diff)
}
continue
}
for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
var cur = sub.changes[j$1]
if (to < cur.from.line) {
cur.from = Pos(cur.from.line + diff, cur.from.ch)
cur.to = Pos(cur.to.line + diff, cur.to.ch)
} else if (from <= cur.to.line) {
ok = false
break
}
}
if (!ok) {
array.splice(0, i + 1)
i = 0
}
}
}





    lineAtHeight: function(height, mode) {
height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
return lineAtHeight(this.doc, height + this.display.viewOffset);
},
heightAtLine: function(line, mode) {
var end = false, last = this.doc.first + this.doc.size - 1;
if (line < this.doc.first) line = this.doc.first;
else if (line > last) { line = last; end = true; }
var lineObj = getLine(this.doc, line);
return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").top +
(end ? this.doc.height - heightAtLine(lineObj) : 0);
},

function rebaseHist(hist, change) {
var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1
rebaseHistArray(hist.done, from, to, diff)
rebaseHistArray(hist.undone, from, to, diff)
}












    defaultTextHeight: function() { return textHeight(this.display); },
defaultCharWidth: function() { return charWidth(this.display); },










// Utility for applying a change to a line by handle or number,
// returning the number and optionally registering the line as
// changed.
function changeLine(doc, handle, changeType, op) {
var no = handle, line = handle
if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)) }
else { no = lineNo(handle) }
if (no == null) { return null }
if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType) }
return line
}





    setGutterMarker: methodOp(function(line, gutterID, value) {
return changeLine(this.doc, line, "gutter", function(line) {
var markers = line.gutterMarkers || (line.gutterMarkers = {});
markers[gutterID] = value;
if (!value && isEmpty(markers)) line.gutterMarkers = null;
return true;
});
}),





// The document is represented as a BTree consisting of leaves, with
// chunk of lines in them, and branches, with up to ten leaves or
// other branch nodes below them. The top node is always a branch
// node, and is the document object itself (meaning it has
// additional methods and properties).
//
// All nodes have parent links. The tree is used both to go from
// line numbers to line objects, and to go from objects to numbers.
// It also indexes by height, and is used to convert between height
// and line object, and to find the total height of the document.
//
// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html





    clearGutter: methodOp(function(gutterID) {
var cm = this, doc = cm.doc, i = doc.first;
doc.iter(function(line) {
if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
line.gutterMarkers[gutterID] = null;
regLineChange(cm, i, "gutter");
if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
}
++i;
});
}),

function LeafChunk(lines) {
var this$1 = this;














    addLineWidget: methodOp(function(handle, node, options) {
return addLineWidget(this, handle, node, options);
}),







  this.lines = lines
this.parent = null
var height = 0
for (var i = 0; i < lines.length; ++i) {
lines[i].parent = this$1
height += lines[i].height
}
this.height = height
}





    removeLineWidget: function(widget) { widget.clear(); },


LeafChunk.prototype = {
chunkSize: function chunkSize() { return this.lines.length },





    lineInfo: function(line) {
if (typeof line == "number") {
if (!isLine(this.doc, line)) return null;
var n = line;
line = getLine(this.doc, line);
if (!line) return null;
} else {
var n = lineNo(line);
if (n == null) return null;
}
return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
widgets: line.widgets};
},

  // Remove the n lines at offset 'at'.
removeInner: function removeInner(at, n) {
var this$1 = this;
















    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo};},








    for (var i = at, e = at + n; i < e; ++i) {
var line = this$1.lines[i]
this$1.height -= line.height
cleanUpLine(line)
signalLater(line, "delete")
}
this.lines.splice(at, n)
},





    addWidget: function(pos, node, scroll, vert, horiz) {
var display = this.display;
pos = cursorCoords(this, clipPos(this.doc, pos));
var top = pos.bottom, left = pos.left;
node.style.position = "absolute";
node.setAttribute("cm-ignore-events", "true");
display.sizer.appendChild(node);
if (vert == "over") {
top = pos.top;
} else if (vert == "above" || vert == "near") {
var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
// Default to positioning above (if specified and possible); otherwise default to positioning below
if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
top = pos.top - node.offsetHeight;
else if (pos.bottom + node.offsetHeight <= vspace)
top = pos.bottom;
if (left + node.offsetWidth > hspace)
left = hspace - node.offsetWidth;
}
node.style.top = top + "px";
node.style.left = node.style.right = "";
if (horiz == "right") {
left = display.sizer.clientWidth - node.offsetWidth;
node.style.right = "0px";
} else {
if (horiz == "left") left = 0;
else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
node.style.left = left + "px";
}
if (scroll)
scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
},

  // Helper used to collapse a small branch into a single leaf.
collapse: function collapse(lines) {
lines.push.apply(lines, this.lines)
},


































    triggerOnKeyDown: methodOp(onKeyDown),
triggerOnKeyPress: methodOp(onKeyPress),
triggerOnKeyUp: onKeyUp,


  // Insert the given array of lines at offset 'at', count them as
// having the given height.
insertInner: function insertInner(at, lines, height) {
var this$1 = this;





    execCommand: function(cmd) {
if (commands.hasOwnProperty(cmd))
return commands[cmd](this);
},

    this.height += height
this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at))
for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1 }
},





    findPosH: function(from, amount, unit, visually) {
var dir = 1;
if (amount < 0) { dir = -1; amount = -amount; }
for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
cur = findPosH(this.doc, cur, dir, unit, visually);
if (cur.hitSide) break;
}
return cur;
},

  // Used to iterate over a part of the tree.
iterN: function iterN(at, n, op) {
var this$1 = this;











    moveH: methodOp(function(dir, unit) {
var cm = this;
cm.extendSelectionsBy(function(range) {
if (cm.display.shift || cm.doc.extend || range.empty())
return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisually);
else
return dir < 0 ? range.from() : range.to();
}, sel_move);
}),

    for (var e = at + n; at < e; ++at)
{ if (op(this$1.lines[at])) { return true } }
}
}










    deleteH: methodOp(function(dir, unit) {
var sel = this.doc.sel, doc = this.doc;
if (sel.somethingSelected())
doc.replaceSelection("", null, "+delete");
else
deleteNearSelection(this, function(range) {
var other = findPosH(doc, range.head, dir, unit, false);
return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other};
});
}),

function BranchChunk(children) {
var this$1 = this;













    findPosV: function(from, amount, unit, goalColumn) {
var dir = 1, x = goalColumn;
if (amount < 0) { dir = -1; amount = -amount; }
for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
var coords = cursorCoords(this, cur, "div");
if (x == null) x = coords.left;
else coords.left = x;
cur = findPosV(this, coords, dir, unit);
if (cur.hitSide) break;
}
return cur;
},

  this.children = children
var size = 0, height = 0
for (var i = 0; i < children.length; ++i) {
var ch = children[i]
size += ch.chunkSize(); height += ch.height
ch.parent = this$1
}
this.size = size
this.height = height
this.parent = null
}






    moveV: methodOp(function(dir, unit) {
var cm = this, doc = this.doc, goals = [];
var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelected();
doc.extendSelectionsBy(function(range) {
if (collapse)
return dir < 0 ? range.from() : range.to();
var headPos = cursorCoords(cm, range.head, "div");
if (range.goalColumn != null) headPos.left = range.goalColumn;
goals.push(headPos.left);
var pos = findPosV(cm, headPos, dir, unit);
if (unit == "page" && range == doc.sel.primary())
addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top);
return pos;
}, sel_move);
if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++)
doc.sel.ranges[i].goalColumn = goals[i];
}),

BranchChunk.prototype = {
chunkSize: function chunkSize() { return this.size },




















    // Find the word at the given position (as returned by coordsChar).
findWordAt: function(pos) {
var doc = this.doc, line = getLine(doc, pos.line).text;
var start = pos.ch, end = pos.ch;
if (line) {
var helper = this.getHelper(pos, "wordChars");
if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
var startChar = line.charAt(start);
var check = isWordChar(startChar, helper)
? function(ch) { return isWordChar(ch, helper); }
: /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
: function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
while (start > 0 && check(line.charAt(start - 1))) --start;
while (end < line.length && check(line.charAt(end))) ++end;
}
return new Range(Pos(pos.line, start), Pos(pos.line, end));
},

  removeInner: function removeInner(at, n) {
var this$1 = this;




















    toggleOverwrite: function(value) {
if (value != null && value == this.state.overwrite) return;
if (this.state.overwrite = !this.state.overwrite)
addClass(this.display.cursorDiv, "CodeMirror-overwrite");
else
rmClass(this.display.cursorDiv, "CodeMirror-overwrite");

















    this.size -= n
for (var i = 0; i < this.children.length; ++i) {
var child = this$1.children[i], sz = child.chunkSize()
if (at < sz) {
var rm = Math.min(n, sz - at), oldHeight = child.height
child.removeInner(at, rm)
this$1.height -= oldHeight - child.height
if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null }
if ((n -= rm) == 0) { break }
at = 0
} else { at -= sz }
}
// If the result is smaller than 25 lines, ensure that it is a
// single leaf node.
if (this.size - n < 25 &&
(this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
var lines = []
this.collapse(lines)
this.children = [new LeafChunk(lines)]
this.children[0].parent = this
}
},





      signal(this, "overwriteToggle", this, this.state.overwrite);
},
hasFocus: function() { return activeElt() == this.display.input; },

  collapse: function collapse(lines) {
var this$1 = this;






    scrollTo: methodOp(function(x, y) {
if (x != null || y != null) resolveScrollToPos(this);
if (x != null) this.curOp.scrollLeft = x;
if (y != null) this.curOp.scrollTop = y;
}),
getScrollInfo: function() {
var scroller = this.display.scroller;
return {left: scroller.scrollLeft, top: scroller.scrollTop,
height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
clientHeight: displayHeight(this), clientWidth: displayWidth(this)};
},

    for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines) }
},















    scrollIntoView: methodOp(function(range, margin) {
if (range == null) {
range = {from: this.doc.sel.primary().head, to: null};
if (margin == null) margin = this.options.cursorScrollMargin;
} else if (typeof range == "number") {
range = {from: Pos(range, 0), to: null};
} else if (range.from == null) {
range = {from: range, to: null};
}
if (!range.to) range.to = range.from;
range.margin = margin || 0;

  insertInner: function insertInner(at, lines, height) {
var this$1 = this;














      if (range.from.line != null) {
resolveScrollToPos(this);
this.curOp.scrollToPos = range;
} else {
var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.left),
Math.min(range.from.top, range.to.top) - range.margin,
Math.max(range.from.right, range.to.right),
Math.max(range.from.bottom, range.to.bottom) + range.margin);
this.scrollTo(sPos.scrollLeft, sPos.scrollTop);












    this.size += lines.length
this.height += height
for (var i = 0; i < this.children.length; ++i) {
var child = this$1.children[i], sz = child.chunkSize()
if (at <= sz) {
child.insertInner(at, lines, height)
if (child.lines && child.lines.length > 50) {
// To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
// Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
var remaining = child.lines.length % 25 + 25
for (var pos = remaining; pos < child.lines.length;) {
var leaf = new LeafChunk(child.lines.slice(pos, pos += 25))
child.height -= leaf.height
this$1.children.splice(++i, 0, leaf)
leaf.parent = this$1
}
child.lines = child.lines.slice(0, remaining)
this$1.maybeSpill()
}
break

      }

      }

    }),



      at -= sz
}
},





    setSize: methodOp(function(width, height) {
var cm = this;
function interpret(val) {
return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;














  // When a node has grown, check whether it should be split.
maybeSpill: function maybeSpill() {
if (this.children.length <= 10) { return }
var me = this
do {
var spilled = me.children.splice(me.children.length - 5, 5)
var sibling = new BranchChunk(spilled)
if (!me.parent) { // Become the parent node
var copy = new BranchChunk(me.children)
copy.parent = me
me.children = [copy, sibling]
me = copy
} else {
me.size -= sibling.size
me.height -= sibling.height
var myIndex = indexOf(me.parent.children, me)
me.parent.children.splice(myIndex + 1, 0, sibling)

      }

      }

      if (width != null) cm.display.wrapper.style.width = interpret(width);
if (height != null) cm.display.wrapper.style.height = interpret(height);
if (cm.options.lineWrapping) clearLineMeasurementCache(this);
var lineNo = cm.display.viewFrom;
cm.doc.iter(lineNo, cm.display.viewTo, function(line) {
if (line.widgets) for (var i = 0; i < line.widgets.length; i++)
if (line.widgets[i].noHScroll) { regLineChange(cm, lineNo, "widget"); break; }
++lineNo;
});
cm.curOp.forceUpdate = true;
signal(cm, "refresh", this);
}),

      sibling.parent = me.parent
} while (me.children.length > 10)
me.parent.maybeSpill()
},













    operation: function(f){return runInOp(this, f);},


  iterN: function iterN(at, n, op) {
var this$1 = this;





    refresh: methodOp(function() {
var oldHeight = this.display.cachedTextHeight;
regChange(this);
this.curOp.forceUpdate = true;
clearCaches(this);
this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop);
updateGutterSpace(this);
if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
estimateLineHeights(this);
signal(this, "refresh", this);
}),

    for (var i = 0; i < this.children.length; ++i) {
var child = this$1.children[i], sz = child.chunkSize()
if (at < sz) {
var used = Math.min(n, sz - at)
if (child.iterN(at, used, op)) { return true }
if ((n -= used) == 0) { break }
at = 0
} else { at -= sz }
}
}
}





    swapDoc: methodOp(function(doc) {
var old = this.doc;
old.cm = null;
attachDoc(this, doc);
clearCaches(this);
resetInput(this);
this.scrollTo(doc.scrollLeft, doc.scrollTop);
this.curOp.forceScroll = true;
signalLater(this, "swapDoc", this, old);
return old;
}),

// Line widgets are block elements displayed above or below a line.















    getInputField: function(){return this.display.input;},
getWrapperElement: function(){return this.display.wrapper;},
getScrollerElement: function(){return this.display.scroller;},
getGutterElement: function(){return this.display.gutters;}
};
eventMixin(CodeMirror);

var LineWidget = function(doc, node, options) {
var this$1 = this;









  // OPTION DEFAULTS





  if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
{ this$1[opt] = options[opt] } } }
this.doc = doc
this.node = node
};





  // The default configuration options.
var defaults = CodeMirror.defaults = {};
// Functions to run when options are changed.
var optionHandlers = CodeMirror.optionHandlers = {};

LineWidget.prototype.clear = function () {
var this$1 = this;







  function option(name, deflt, handle, notOnInit) {
CodeMirror.defaults[name] = deflt;
if (handle) optionHandlers[name] =
notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;









  var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line)
if (no == null || !ws) { return }
for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1) } }
if (!ws.length) { line.widgets = null }
var height = widgetHeight(this)
updateLineHeight(line, Math.max(0, line.height - height))
if (cm) {
runInOp(cm, function () {
adjustScrollWhenAboveVisible(cm, line, -height)
regLineChange(cm, no, "widget")
})
signalLater(cm, "lineWidgetCleared", cm, this, no)

  }

  }

 
};





  // Passed to option handlers when there is no old value.
var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};

LineWidget.prototype.changed = function () {
var this$1 = this;





  // These two are, on init, called from the constructor because they
// have to be initialized before the editor can start at all.
option("value", "", function(cm, val) {
cm.setValue(val);
}, true);
option("mode", null, function(cm, val) {
cm.doc.modeOption = val;
loadMode(cm);
}, true);






  var oldH = this.height, cm = this.doc.cm, line = this.line
this.height = null
var diff = widgetHeight(this) - oldH
if (!diff) { return }
updateLineHeight(line, line.height + diff)
if (cm) {
runInOp(cm, function () {
cm.curOp.forceUpdate = true
adjustScrollWhenAboveVisible(cm, line, diff)
signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line))
})
}
};
eventMixin(LineWidget)





  option("indentUnit", 2, loadMode, true);
option("indentWithTabs", false);
option("smartIndent", true);
option("tabSize", 4, function(cm) {
resetModeState(cm);
clearCaches(cm);
regChange(cm);
}, true);
option("specialChars", /[\t\u0000-\u0019\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function(cm, val) {
cm.options.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
cm.refresh();
}, true);
option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true);
option("electricChars", true);
option("rtlMoveVisually", !windows);
option("wholeLineUpdateBefore", true);

function adjustScrollWhenAboveVisible(cm, line, diff) {
if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
{ addToScrollTop(cm, diff) }
}

















  option("theme", "default", function(cm) {
themeChanged(cm);
guttersChanged(cm);
}, true);
option("keyMap", "default", function(cm, val, old) {
var next = getKeyMap(val);
var prev = old != CodeMirror.Init && getKeyMap(old);
if (prev && prev.detach) prev.detach(cm, next);
if (next.attach) next.attach(cm, prev || null);
});
option("extraKeys", null);










function addLineWidget(doc, handle, node, options) {
var widget = new LineWidget(doc, node, options)
var cm = doc.cm
if (cm && widget.noHScroll) { cm.display.alignWidgets = true }
changeLine(doc, handle, "widget", function (line) {
var widgets = line.widgets || (line.widgets = [])
if (widget.insertAt == null) { widgets.push(widget) }
else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget) }
widget.line = line
if (cm && !lineIsHidden(doc, line)) {
var aboveVisible = heightAtLine(line) < doc.scrollTop
updateLineHeight(line, line.height + widgetHeight(widget))
if (aboveVisible) { addToScrollTop(cm, widget.height) }
cm.curOp.forceUpdate = true
}
return true
})
signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle))
return widget
}





  option("lineWrapping", false, wrappingChanged, true);
option("gutters", [], function(cm) {
setGuttersForLineNumbers(cm.options);
guttersChanged(cm);
}, true);
option("fixedGutter", true, function(cm, val) {
cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
cm.refresh();
}, true);
option("coverGutterNextToScrollbar", false, function(cm) {updateScrollbars(cm);}, true);
option("scrollbarStyle", "native", function(cm) {
initScrollbars(cm);
updateScrollbars(cm);
cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
}, true);
option("lineNumbers", false, function(cm) {
setGuttersForLineNumbers(cm.options);
guttersChanged(cm);
}, true);
option("firstLineNumber", 1, guttersChanged, true);
option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
option("showCursorWhenSelecting", false, updateSelection, true);

// TEXTMARKERS



























  option("resetSelectionOnContextMenu", true);









// Created with markText and setBookmark methods. A TextMarker is a
// handle that can be used to clear or find a marked position in the
// document. Line objects hold arrays (markedSpans) containing
// {from, to, marker} object pointing to such marker objects, and
// indicating that such a marker is present on that line. Multiple
// lines may point to the same marker when it spans across lines.
// The spans will have null for their from/to properties when the
// marker continues beyond the start/end of the line. Markers have
// links back to the lines they currently touch.





  option("readOnly", false, function(cm, val) {
if (val == "nocursor") {
onBlur(cm);
cm.display.input.blur();
cm.display.disabled = true;
} else {
cm.display.disabled = false;
if (!val) resetInput(cm);
}
});
option("disableInput", false, function(cm, val) {if (!val) resetInput(cm);}, true);
option("dragDrop", true);

// Collapsed markers have unique ids, in order to be able to order
// them, which is needed for uniquely determining an outer marker
// when they overlap (they may nest, but not partially overlap).
var nextMarkerId = 0













  option("cursorBlinkRate", 530);
option("cursorScrollMargin", 0);
option("cursorHeight", 1, updateSelection, true);
option("singleCursorHeightPerLine", true, updateSelection, true);
option("workTime", 100);
option("workDelay", 100);
option("flattenSpans", true, resetModeState, true);
option("addModeClass", false, resetModeState, true);
option("pollInterval", 100);
option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;});
option("historyEventDelay", 1250);
option("viewportMargin", 10, function(cm){cm.refresh();}, true);
option("maxHighlightLength", 10000, resetModeState, true);
option("moveInputWithCursor", true, function(cm, val) {
if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0;
});

var TextMarker = function(doc, type) {
this.lines = []
this.type = type
this.doc = doc
this.id = ++nextMarkerId
};















  option("tabindex", null, function(cm, val) {
cm.display.input.tabIndex = val || "";
});
option("autofocus", null);

// Clear the marker.
TextMarker.prototype.clear = function () {
var this$1 = this;






  // MODE DEFINITION AND QUERYING




























  if (this.explicitlyCleared) { return }
var cm = this.doc.cm, withOp = cm && !cm.curOp
if (withOp) { startOperation(cm) }
if (hasHandler(this, "clear")) {
var found = this.find()
if (found) { signalLater(this, "clear", found.from, found.to) }
}
var min = null, max = null
for (var i = 0; i < this.lines.length; ++i) {
var line = this$1.lines[i]
var span = getMarkedSpanFor(line.markedSpans, this$1)
if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text") }
else if (cm) {
if (span.to != null) { max = lineNo(line) }
if (span.from != null) { min = lineNo(line) }
}
line.markedSpans = removeMarkedSpan(line.markedSpans, span)
if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
{ updateLineHeight(line, textHeight(cm.display)) }
}
if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual)
if (len > cm.display.maxLineLength) {
cm.display.maxLine = visual
cm.display.maxLineLength = len
cm.display.maxLineChanged = true
}
} }





  // Known modes, by name and by MIME
var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};










  if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1) }
this.lines.length = 0
this.explicitlyCleared = true
if (this.atomic && this.doc.cantEdit) {
this.doc.cantEdit = false
if (cm) { reCheckSelection(cm.doc) }
}
if (cm) { signalLater(cm, "markerCleared", cm, this, min, max) }
if (withOp) { endOperation(cm) }
if (this.parent) { this.parent.clear() }
};





  // Extra arguments are stored as the mode's dependencies, which is
// used by (legacy) mechanisms like loadmode.js to automatically
// load a mode. (Preferred mechanism is the require/define calls.)
CodeMirror.defineMode = function(name, mode) {
if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
if (arguments.length > 2)
mode.dependencies = Array.prototype.slice.call(arguments, 2);
modes[name] = mode;
};

// Find the position of the marker in the document. Returns a {from,
// to} object by default. Side can be passed to get a specific side
// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
// Pos objects returned contain a line object, rather than a line
// number (used to prevent looking up the same line twice).
TextMarker.prototype.find = function (side, lineObj) {
var this$1 = this;







  CodeMirror.defineMIME = function(mime, spec) {
mimeModes[mime] = spec;
};

// Given a MIME type, a {name, ...options} config object, or a name
// string, return a mode config object.
CodeMirror.resolveMode = function(spec) {
if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
spec = mimeModes[spec];
} else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
var found = mimeModes[spec.name];
if (typeof found == "string") found = {name: found};
spec = createObj(found, spec);
spec.name = found.name;
} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
return CodeMirror.resolveMode("application/xml");

  if (side == null && this.type == "bookmark") { side = 1 }
var from, to
for (var i = 0; i < this.lines.length; ++i) {
var line = this$1.lines[i]
var span = getMarkedSpanFor(line.markedSpans, this$1)
if (span.from != null) {
from = Pos(lineObj ? line : lineNo(line), span.from)
if (side == -1) { return from }









    }

    }

    if (typeof spec == "string") return {name: spec};
else return spec || {name: "null"};
};

// Given a mode spec (anything that resolveMode accepts), find and
// initialize an actual mode object.
CodeMirror.getMode = function(options, spec) {
var spec = CodeMirror.resolveMode(spec);
var mfactory = modes[spec.name];
if (!mfactory) return CodeMirror.getMode(options, "text/plain");
var modeObj = mfactory(options, spec);
if (modeExtensions.hasOwnProperty(spec.name)) {
var exts = modeExtensions[spec.name];
for (var prop in exts) {
if (!exts.hasOwnProperty(prop)) continue;
if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
modeObj[prop] = exts[prop];
}

    if (span.to != null) {
to = Pos(lineObj ? line : lineNo(line), span.to)
if (side == 1) { return to }
















    }

    }

    modeObj.name = spec.name;
if (spec.helperType) modeObj.helperType = spec.helperType;
if (spec.modeProps) for (var prop in spec.modeProps)
modeObj[prop] = spec.modeProps[prop];

  }
return from && {from: from, to: to}
};






    return modeObj;
};



// Signals that the marker's widget changed, and surrounding layout
// should be recomputed.
TextMarker.prototype.changed = function () {
var this$1 = this;





  // Minimal default mode.
CodeMirror.defineMode("null", function() {
return {token: function(stream) {stream.skipToEnd();}};
});
CodeMirror.defineMIME("text/plain", "null");
















  var pos = this.find(-1, true), widget = this, cm = this.doc.cm
if (!pos || !cm) { return }
runInOp(cm, function () {
var line = pos.line, lineN = lineNo(pos.line)
var view = findViewForLine(cm, lineN)
if (view) {
clearLineMeasurementCacheFor(view)
cm.curOp.selectionChanged = cm.curOp.forceUpdate = true
}
cm.curOp.updateMaxLine = true
if (!lineIsHidden(widget.doc, line) && widget.height != null) {
var oldHeight = widget.height
widget.height = null
var dHeight = widgetHeight(widget) - oldHeight
if (dHeight)
{ updateLineHeight(line, line.height + dHeight) }
}
signalLater(cm, "markerChanged", cm, this$1)
})
};





  // This can be used to attach properties to mode objects from
// outside the actual mode definition.
var modeExtensions = CodeMirror.modeExtensions = {};
CodeMirror.extendMode = function(mode, properties) {
var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
copyObj(properties, exts);
};


TextMarker.prototype.attachLine = function (line) {
if (!this.lines.length && this.doc.cm) {
var op = this.doc.cm.curOp
if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
{ (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this) }
}
this.lines.push(line)
};





  // EXTENSIONS








TextMarker.prototype.detachLine = function (line) {
this.lines.splice(indexOf(this.lines, line), 1)
if (!this.lines.length && this.doc.cm) {
var op = this.doc.cm.curOp
;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this)
}
};
eventMixin(TextMarker)





  CodeMirror.defineExtension = function(name, func) {
CodeMirror.prototype[name] = func;
};
CodeMirror.defineDocExtension = function(name, func) {
Doc.prototype[name] = func;
};
CodeMirror.defineOption = option;


// Create a marker, wire it up to the right lines, and
function markText(doc, from, to, options, type) {
// Shared markers (across linked documents) are handled separately
// (markTextShared will call out to this again, once per
// document).
if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
// Ensure we are in an operation.
if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }





  var initHooks = [];
CodeMirror.defineInitHook = function(f) {initHooks.push(f);};

















  var marker = new TextMarker(doc, type), diff = cmp(from, to)
if (options) { copyObj(options, marker, false) }
// Don't connect empty markers unless clearWhenEmpty is false
if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
{ return marker }
if (marker.replacedWith) {
// Showing up as a widget implies collapsed (widget replaces text)
marker.collapsed = true
marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget")
if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true") }
if (options.insertLeft) { marker.widgetNode.insertLeft = true }
}
if (marker.collapsed) {
if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
{ throw new Error("Inserting collapsed marker partially overlapping an existing one") }
seeCollapsedSpans()
}





  var helpers = CodeMirror.helpers = {};
CodeMirror.registerHelper = function(type, name, value) {
if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []};
helpers[type][name] = value;
};
CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
CodeMirror.registerHelper(type, name, value);
helpers[type]._global.push({pred: predicate, val: value});
};

  if (marker.addToHistory)
{ addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN) }












  // MODE STATE HANDLING














  var curLine = from.line, cm = doc.cm, updateMaxLine
doc.iter(curLine, to.line + 1, function (line) {
if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
{ updateMaxLine = true }
if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0) }
addMarkedSpan(line, new MarkedSpan(marker,
curLine == from.line ? from.ch : null,
curLine == to.line ? to.ch : null))
++curLine
})
// lineIsHidden depends on the presence of the spans, so needs a second pass
if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
if (lineIsHidden(doc, line)) { updateLineHeight(line, 0) }
}) }





  // Utility functions for working with state. Exported because nested
// modes need to do this for their inner modes.

  if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }) }






  var copyState = CodeMirror.copyState = function(mode, state) {
if (state === true) return state;
if (mode.copyState) return mode.copyState(state);
var nstate = {};
for (var n in state) {
var val = state[n];
if (val instanceof Array) val = val.concat([]);
nstate[n] = val;
}
return nstate;
};











  if (marker.readOnly) {
seeReadOnlySpans()
if (doc.history.done.length || doc.history.undone.length)
{ doc.clearHistory() }
}
if (marker.collapsed) {
marker.id = ++nextMarkerId
marker.atomic = true
}
if (cm) {
// Sync editor state
if (updateMaxLine) { cm.curOp.updateMaxLine = true }
if (marker.collapsed)
{ regChange(cm, from.line, to.line + 1) }
else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
{ for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text") } }
if (marker.atomic) { reCheckSelection(cm.doc) }
signalLater(cm, "markerAdded", cm, marker)
}
return marker
}





  var startState = CodeMirror.startState = function(mode, a1, a2) {
return mode.startState ? mode.startState(a1, a2) : true;
};

// SHARED TEXTMARKERS







  // Given a mode and a state (for that mode), find the inner mode and
// state at the position that the state refers to.
CodeMirror.innerMode = function(mode, state) {
while (mode.innerMode) {
var info = mode.innerMode(state);
if (!info || info.mode == mode) break;
state = info.state;
mode = info.mode;
}
return info || {mode: mode, state: state};
};

// A shared marker spans multiple linked documents. It is
// implemented as a meta-marker-object controlling multiple normal
// markers.
var SharedTextMarker = function(markers, primary) {
var this$1 = this;











  // STANDARD COMMANDS





  this.markers = markers
this.primary = primary
for (var i = 0; i < markers.length; ++i)
{ markers[i].parent = this$1 }
};





  // Commands are parameter-less actions that can be performed on an
// editor, mostly used for keybindings.
var commands = CodeMirror.commands = {
selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);},
singleSelection: function(cm) {
cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll);
},
killLine: function(cm) {
deleteNearSelection(cm, function(range) {
if (range.empty()) {
var len = getLine(cm.doc, range.head.line).text.length;
if (range.head.ch == len && range.head.line < cm.lastLine())
return {from: range.head, to: Pos(range.head.line + 1, 0)};
else
return {from: range.head, to: Pos(range.head.line, len)};
} else {
return {from: range.from(), to: range.to()};
}
});
},
deleteLine: function(cm) {
deleteNearSelection(cm, function(range) {
return {from: Pos(range.from().line, 0),
to: clipPos(cm.doc, Pos(range.to().line + 1, 0))};
});
},
delLineLeft: function(cm) {
deleteNearSelection(cm, function(range) {
return {from: Pos(range.from().line, 0), to: range.from()};
});
},
delWrappedLineLeft: function(cm) {
deleteNearSelection(cm, function(range) {
var top = cm.charCoords(range.head, "div").top + 5;
var leftPos = cm.coordsChar({left: 0, top: top}, "div");
return {from: leftPos, to: range.from()};
});
},
delWrappedLineRight: function(cm) {
deleteNearSelection(cm, function(range) {
var top = cm.charCoords(range.head, "div").top + 5;
var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
return {from: range.from(), to: rightPos };
});
},
undo: function(cm) {cm.undo();},
redo: function(cm) {cm.redo();},
undoSelection: function(cm) {cm.undoSelection();},
redoSelection: function(cm) {cm.redoSelection();},
goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
goLineStart: function(cm) {
cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.line); },
{origin: "+move", bias: 1});
},
goLineStartSmart: function(cm) {
cm.extendSelectionsBy(function(range) {
return lineStartSmart(cm, range.head);
}, {origin: "+move", bias: 1});
},
goLineEnd: function(cm) {
cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); },
{origin: "+move", bias: -1});
},
goLineRight: function(cm) {
cm.extendSelectionsBy(function(range) {
var top = cm.charCoords(range.head, "div").top + 5;
return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
}, sel_move);
},
goLineLeft: function(cm) {
cm.extendSelectionsBy(function(range) {
var top = cm.charCoords(range.head, "div").top + 5;
return cm.coordsChar({left: 0, top: top}, "div");
}, sel_move);
},
goLineLeftSmart: function(cm) {
cm.extendSelectionsBy(function(range) {
var top = cm.charCoords(range.head, "div").top + 5;
var pos = cm.coordsChar({left: 0, top: top}, "div");
if (pos.ch < cm.getLine(pos.line).search(/\S/)) return lineStartSmart(cm, range.head);
return pos;
}, sel_move);
},
goLineUp: function(cm) {cm.moveV(-1, "line");},
goLineDown: function(cm) {cm.moveV(1, "line");},
goPageUp: function(cm) {cm.moveV(-1, "page");},
goPageDown: function(cm) {cm.moveV(1, "page");},
goCharLeft: function(cm) {cm.moveH(-1, "char");},
goCharRight: function(cm) {cm.moveH(1, "char");},
goColumnLeft: function(cm) {cm.moveH(-1, "column");},
goColumnRight: function(cm) {cm.moveH(1, "column");},
goWordLeft: function(cm) {cm.moveH(-1, "word");},
goGroupRight: function(cm) {cm.moveH(1, "group");},
goGroupLeft: function(cm) {cm.moveH(-1, "group");},
goWordRight: function(cm) {cm.moveH(1, "word");},
delCharBefore: function(cm) {cm.deleteH(-1, "char");},
delCharAfter: function(cm) {cm.deleteH(1, "char");},
delWordBefore: function(cm) {cm.deleteH(-1, "word");},
delWordAfter: function(cm) {cm.deleteH(1, "word");},
delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
delGroupAfter: function(cm) {cm.deleteH(1, "group");},
indentAuto: function(cm) {cm.indentSelection("smart");},
indentMore: function(cm) {cm.indentSelection("add");},
indentLess: function(cm) {cm.indentSelection("subtract");},
insertTab: function(cm) {cm.replaceSelection("\t");},
insertSoftTab: function(cm) {
var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
for (var i = 0; i < ranges.length; i++) {
var pos = ranges[i].from();
var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
spaces.push(new Array(tabSize - col % tabSize + 1).join(" "));
}
cm.replaceSelections(spaces);
},
defaultTab: function(cm) {
if (cm.somethingSelected()) cm.indentSelection("add");
else cm.execCommand("insertTab");
},
transposeChars: function(cm) {
runInOp(cm, function() {
var ranges = cm.listSelections(), newSel = [];
for (var i = 0; i < ranges.length; i++) {
var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
if (line) {
if (cur.ch == line.length) cur = new Pos(cur.line, cur.ch - 1);
if (cur.ch > 0) {
cur = new Pos(cur.line, cur.ch + 1);
cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
Pos(cur.line, cur.ch - 2), cur, "+transpose");
} else if (cur.line > cm.doc.first) {
var prev = getLine(cm.doc, cur.line - 1).text;
if (prev)
cm.replaceRange(line.charAt(0) + "\n" + prev.charAt(prev.length - 1),
Pos(cur.line - 1, prev.length - 1), Pos(cur.line, 1), "+transpose");
}
}
newSel.push(new Range(cur, cur));
}
cm.setSelections(newSel);
});
},
newlineAndIndent: function(cm) {
runInOp(cm, function() {
var len = cm.listSelections().length;
for (var i = 0; i < len; i++) {
var range = cm.listSelections()[i];
cm.replaceRange("\n", range.anchor, range.head, "+input");
cm.indentLine(range.from().line + 1, null, true);
ensureCursorVisible(cm);
}
});
},
toggleOverwrite: function(cm) {cm.toggleOverwrite();}
};

SharedTextMarker.prototype.clear = function () {
var this$1 = this;






























































































































































 
  if (this.explicitlyCleared) { return }
this.explicitlyCleared = true
for (var i = 0; i < this.markers.length; ++i)
{ this$1.markers[i].clear() }
signalLater(this, "clear")
};





  // STANDARD KEYMAPS




SharedTextMarker.prototype.find = function (side, lineObj) {
return this.primary.find(side, lineObj)
};
eventMixin(SharedTextMarker)





  var keyMap = CodeMirror.keyMap = {};














function markTextShared(doc, from, to, options, type) {
options = copyObj(options)
options.shared = false
var markers = [markText(doc, from, to, options, type)], primary = markers[0]
var widget = options.widgetNode
linkedDocs(doc, function (doc) {
if (widget) { options.widgetNode = widget.cloneNode(true) }
markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type))
for (var i = 0; i < doc.linked.length; ++i)
{ if (doc.linked[i].isParent) { return } }
primary = lst(markers)
})
return new SharedTextMarker(markers, primary)
}





  keyMap.basic = {
"Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
"End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
"Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
"Tab": "defaultTab", "Shift-Tab": "indentAuto",
"Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
"Esc": "singleSelection"
};
// Note that the save and find-related commands aren't defined by
// default. User code or addons can define them. Unknown commands
// are simply ignored.
keyMap.pcDefault = {
"Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
"Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
"Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
"Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
"Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
"Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
"Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
fallthrough: "basic"
};
// Very basic readline/emacs-style bindings, which are standard on Mac.
keyMap.emacsy = {
"Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
"Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
"Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
"Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
};
keyMap.macDefault = {
"Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
"Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
"Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
"Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
"Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
"Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
"Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
fallthrough: ["basic", "emacsy"]
};
keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;

// KEYMAP DISPATCH

function findSharedMarkers(doc) {
return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
}











































  function normalizeKeyName(name) {
var parts = name.split(/-(?!$)/), name = parts[parts.length - 1];
var alt, ctrl, shift, cmd;
for (var i = 0; i < parts.length - 1; i++) {
var mod = parts[i];
if (/^(cmd|meta|m)$/i.test(mod)) cmd = true;
else if (/^a(lt)?$/i.test(mod)) alt = true;
else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true;
else if (/^s(hift)$/i.test(mod)) shift = true;
else throw new Error("Unrecognized modifier name: " + mod);

function copySharedMarkers(doc, markers) {
for (var i = 0; i < markers.length; i++) {
var marker = markers[i], pos = marker.find()
var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to)
if (cmp(mFrom, mTo)) {
var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type)
marker.markers.push(subMark)
subMark.parent = marker



    }

    }

    if (alt) name = "Alt-" + name;
if (ctrl) name = "Ctrl-" + name;
if (cmd) name = "Cmd-" + name;
if (shift) name = "Shift-" + name;
return name;

 
  }

  }

 
}





  // This is a kludge to keep keymaps mostly working as raw objects
// (backwards compatibility) while at the same time support features
// like normalization and multi-stroke key bindings. It compiles a
// new normalized keymap, and then updates the old object to reflect
// this.
CodeMirror.normalizeKeyMap = function(keymap) {
var copy = {};
for (var keyname in keymap) if (keymap.hasOwnProperty(keyname)) {
var value = keymap[keyname];
if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) continue;
if (value == "...") { delete keymap[keyname]; continue; }

var keys = map(keyname.split(" "), normalizeKeyName);
for (var i = 0; i < keys.length; i++) {
var val, name;
if (i == keys.length - 1) {
name = keyname;
val = value;
} else {
name = keys.slice(0, i + 1).join(" ");
val = "...";
}
var prev = copy[name];
if (!prev) copy[name] = val;
else if (prev != val) throw new Error("Inconsistent bindings for " + name);

function detachSharedMarkers(markers) {
var loop = function ( i ) {
var marker = markers[i], linked = [marker.primary.doc]
linkedDocs(marker.primary.doc, function (d) { return linked.push(d); })
for (var j = 0; j < marker.markers.length; j++) {
var subMarker = marker.markers[j]
if (indexOf(linked, subMarker.doc) == -1) {
subMarker.parent = null
marker.markers.splice(j--, 1)

















      }

      }

      delete keymap[keyname];

 
    }

    }

    for (var prop in copy) keymap[prop] = copy[prop];
return keymap;

 
  };


  };


  var lookupKey = CodeMirror.lookupKey = function(key, map, handle, context) {
map = getKeyMap(map);
var found = map.call ? map.call(key, context) : map[key];
if (found === false) return "nothing";
if (found === "...") return "multi";
if (found != null && handle(found)) return "handled";

  for (var i = 0; i < markers.length; i++) loop( i );
}









    if (map.fallthrough) {
if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
return lookupKey(key, map.fallthrough, handle, context);
for (var i = 0; i < map.fallthrough.length; i++) {
var result = lookupKey(key, map.fallthrough[i], handle, context);
if (result) return result;
}
}
};

var nextDocId = 0
var Doc = function(text, mode, firstLine, lineSep, direction) {
if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
if (firstLine == null) { firstLine = 0 }










  // Modifier key presses don't count as 'real' key presses for the
// purpose of keymap fallthrough.
var isModifierKey = CodeMirror.isModifierKey = function(value) {
var name = typeof value == "string" ? value : keyNames[value.keyCode];
return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
};









  BranchChunk.call(this, [new LeafChunk([new Line("", null)])])
this.first = firstLine
this.scrollTop = this.scrollLeft = 0
this.cantEdit = false
this.cleanGeneration = 1
this.modeFrontier = this.highlightFrontier = firstLine
var start = Pos(firstLine, 0)
this.sel = simpleSelection(start)
this.history = new History(null)
this.id = ++nextDocId
this.modeOption = mode
this.lineSep = lineSep
this.direction = (direction == "rtl") ? "rtl" : "ltr"
this.extend = false





  // Look up the name of a key as indicated by an event object.
var keyName = CodeMirror.keyName = function(event, noShift) {
if (presto && event.keyCode == 34 && event["char"]) return false;
var base = keyNames[event.keyCode], name = base;
if (name == null || event.altGraphKey) return false;
if (event.altKey && base != "Alt") name = "Alt-" + name;
if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") name = "Ctrl-" + name;
if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") name = "Cmd-" + name;
if (!noShift && event.shiftKey && base != "Shift") name = "Shift-" + name;
return name;
};

  if (typeof text == "string") { text = this.splitLines(text) }
updateDoc(this, {from: start, to: start, text: text})
setSelection(this, simpleSelection(start), sel_dontScroll)
}












  function getKeyMap(val) {
return typeof val == "string" ? keyMap[val] : val;
}








Doc.prototype = createObj(BranchChunk.prototype, {
constructor: Doc,
// Iterate over the document. Supports two forms -- with only one
// argument, it calls that for each line in the document. With
// three, it iterates over the range given by the first two (with
// the second being non-inclusive).
iter: function(from, to, op) {
if (op) { this.iterN(from - this.first, to - from, op) }
else { this.iterN(this.first, this.first + this.size, from) }
},





  // FROMTEXTAREA







  // Non-public interface for adding and removing lines.
insert: function(at, lines) {
var height = 0
for (var i = 0; i < lines.length; ++i) { height += lines[i].height }
this.insertInner(at - this.first, lines, height)
},
remove: function(at, n) { this.removeInner(at - this.first, n) },





  CodeMirror.fromTextArea = function(textarea, options) {
if (!options) options = {};
options.value = textarea.value;
if (!options.tabindex && textarea.tabindex)
options.tabindex = textarea.tabindex;
if (!options.placeholder && textarea.placeholder)
options.placeholder = textarea.placeholder;
// Set autofocus to true if this textarea is focused, or if it has
// autofocus and no other element is focused.
if (options.autofocus == null) {
var hasFocus = activeElt();
options.autofocus = hasFocus == textarea ||
textarea.getAttribute("autofocus") != null && hasFocus == document.body;
}

  // From here, the methods are part of the public interface. Most
// are also available from CodeMirror (editor) instances.

















    function save() {textarea.value = cm.getValue();}
if (textarea.form) {
on(textarea.form, "submit", save);
// Deplorable hack to make the submit method do the right thing.
if (!options.leaveSubmitMethodAlone) {
var form = textarea.form, realSubmit = form.submit;
try {
var wrappedSubmit = form.submit = function() {
save();
form.submit = realSubmit;
form.submit();
form.submit = wrappedSubmit;
};
} catch(e) {}
}
}







  getValue: function(lineSep) {
var lines = getLines(this, this.first, this.first + this.size)
if (lineSep === false) { return lines }
return lines.join(lineSep || this.lineSeparator())
},
setValue: docMethodOp(function(code) {
var top = Pos(this.first, 0), last = this.first + this.size - 1
makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
text: this.splitLines(code), origin: "setValue", full: true}, true)
if (this.cm) { scrollToCoords(this.cm, 0, 0) }
setSelection(this, simpleSelection(top), sel_dontScroll)
}),
replaceRange: function(code, from, to, origin) {
from = clipPos(this, from)
to = to ? clipPos(this, to) : from
replaceRange(this, code, from, to, origin)
},
getRange: function(from, to, lineSep) {
var lines = getBetween(this, clipPos(this, from), clipPos(this, to))
if (lineSep === false) { return lines }
return lines.join(lineSep || this.lineSeparator())
},





    textarea.style.display = "none";
var cm = CodeMirror(function(node) {
textarea.parentNode.insertBefore(node, textarea.nextSibling);
}, options);
cm.save = save;
cm.getTextArea = function() { return textarea; };
cm.toTextArea = function() {
cm.toTextArea = isNaN; // Prevent this from being ran twice
save();
textarea.parentNode.removeChild(cm.getWrapperElement());
textarea.style.display = "";
if (textarea.form) {
off(textarea.form, "submit", save);
if (typeof textarea.form.submit == "function")
textarea.form.submit = realSubmit;
}
};
return cm;
};

  getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},























  // STRING STREAM


  getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
getLineNumber: function(line) {return lineNo(line)},





  // Fed to the mode parsers, provides helper functions to make
// parsers more succinct.



  getLineHandleVisualStart: function(line) {
if (typeof line == "number") { line = getLine(this, line) }
return visualLine(line)
},





  var StringStream = CodeMirror.StringStream = function(string, tabSize) {
this.pos = this.start = 0;
this.string = string;
this.tabSize = tabSize || 8;
this.lastColumnPos = this.lastColumnValue = 0;
this.lineStart = 0;
};

  lineCount: function() {return this.size},
firstLine: function() {return this.first},
lastLine: function() {return this.first + this.size - 1},









  StringStream.prototype = {
eol: function() {return this.pos >= this.string.length;},
sol: function() {return this.pos == this.lineStart;},
peek: function() {return this.string.charAt(this.pos) || undefined;},
next: function() {
if (this.pos < this.string.length)
return this.string.charAt(this.pos++);
},
eat: function(match) {
var ch = this.string.charAt(this.pos);
if (typeof match == "string") var ok = ch == match;
else var ok = ch && (match.test ? match.test(ch) : match(ch));
if (ok) {++this.pos; return ch;}
},
eatWhile: function(match) {
var start = this.pos;
while (this.eat(match)){}
return this.pos > start;
},
eatSpace: function() {
var start = this.pos;
while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
return this.pos > start;
},
skipToEnd: function() {this.pos = this.string.length;},
skipTo: function(ch) {
var found = this.string.indexOf(ch, this.pos);
if (found > -1) {this.pos = found; return true;}
},
backUp: function(n) {this.pos -= n;},
column: function() {
if (this.lastColumnPos < this.start) {
this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
this.lastColumnPos = this.start;
}
return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
},
indentation: function() {
return countColumn(this.string, null, this.tabSize) -
(this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
},
match: function(pattern, consume, caseInsensitive) {
if (typeof pattern == "string") {
var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
var substr = this.string.substr(this.pos, pattern.length);
if (cased(substr) == cased(pattern)) {
if (consume !== false) this.pos += pattern.length;
return true;
}
} else {
var match = this.string.slice(this.pos).match(pattern);
if (match && match.index > 0) return null;
if (match && consume !== false) this.pos += match[0].length;
return match;
}
},
current: function(){return this.string.slice(this.start, this.pos);},
hideFirstChars: function(n, inner) {
this.lineStart += n;
try { return inner(); }
finally { this.lineStart -= n; }
}
};

  clipPos: function(pos) {return clipPos(this, pos)},



































































  // TEXTMARKERS










  getCursor: function(start) {
var range = this.sel.primary(), pos
if (start == null || start == "head") { pos = range.head }
else if (start == "anchor") { pos = range.anchor }
else if (start == "end" || start == "to" || start === false) { pos = range.to() }
else { pos = range.from() }
return pos
},
listSelections: function() { return this.sel.ranges },
somethingSelected: function() {return this.sel.somethingSelected()},





  // Created with markText and setBookmark methods. A TextMarker is a
// handle that can be used to clear or find a marked position in the
// document. Line objects hold arrays (markedSpans) containing
// {from, to, marker} object pointing to such marker objects, and
// indicating that such a marker is present on that line. Multiple
// lines may point to the same marker when it spans across lines.
// The spans will have null for their from/to properties when the
// marker continues beyond the start/end of the line. Markers have
// links back to the lines they currently touch.










  setCursor: docMethodOp(function(line, ch, options) {
setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options)
}),
setSelection: docMethodOp(function(anchor, head, options) {
setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options)
}),
extendSelection: docMethodOp(function(head, other, options) {
extendSelection(this, clipPos(this, head), other && clipPos(this, other), options)
}),
extendSelections: docMethodOp(function(heads, options) {
extendSelections(this, clipPosArray(this, heads), options)
}),
extendSelectionsBy: docMethodOp(function(f, options) {
var heads = map(this.sel.ranges, f)
extendSelections(this, clipPosArray(this, heads), options)
}),
setSelections: docMethodOp(function(ranges, primary, options) {
var this$1 = this;





  var TextMarker = CodeMirror.TextMarker = function(doc, type) {
this.lines = [];
this.type = type;
this.doc = doc;
};
eventMixin(TextMarker);








    if (!ranges.length) { return }
var out = []
for (var i = 0; i < ranges.length; i++)
{ out[i] = new Range(clipPos(this$1, ranges[i].anchor),
clipPos(this$1, ranges[i].head)) }
if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex) }
setSelection(this, normalizeSelection(out, primary), options)
}),
addSelection: docMethodOp(function(anchor, head, options) {
var ranges = this.sel.ranges.slice(0)
ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)))
setSelection(this, normalizeSelection(ranges, ranges.length - 1), options)
}),





  // Clear the marker.
TextMarker.prototype.clear = function() {
if (this.explicitlyCleared) return;
var cm = this.doc.cm, withOp = cm && !cm.curOp;
if (withOp) startOperation(cm);
if (hasHandler(this, "clear")) {
var found = this.find();
if (found) signalLater(this, "clear", found.from, found.to);

  getSelection: function(lineSep) {
var this$1 = this;

var ranges = this.sel.ranges, lines
for (var i = 0; i < ranges.length; i++) {
var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
lines = lines ? lines.concat(sel) : sel


    }

    }

    var min = null, max = null;
for (var i = 0; i < this.lines.length; ++i) {
var line = this.lines[i];
var span = getMarkedSpanFor(line.markedSpans, this);
if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text");
else if (cm) {
if (span.to != null) max = lineNo(line);
if (span.from != null) min = lineNo(line);
}
line.markedSpans = removeMarkedSpan(line.markedSpans, span);
if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
updateLineHeight(line, textHeight(cm.display));
}
if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
var visual = visualLine(this.lines[i]), len = lineLength(visual);
if (len > cm.display.maxLineLength) {
cm.display.maxLine = visual;
cm.display.maxLineLength = len;
cm.display.maxLineChanged = true;
}

    if (lineSep === false) { return lines }
else { return lines.join(lineSep || this.lineSeparator()) }
},
getSelections: function(lineSep) {
var this$1 = this;

var parts = [], ranges = this.sel.ranges
for (var i = 0; i < ranges.length; i++) {
var sel = getBetween(this$1, ranges[i].from(), ranges[i].to())
if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()) }
parts[i] = sel










    }

    }

 
    return parts
},
replaceSelection: function(code, collapse, origin) {
var dup = []
for (var i = 0; i < this.sel.ranges.length; i++)
{ dup[i] = code }
this.replaceSelections(dup, collapse, origin || "+input")
},
replaceSelections: docMethodOp(function(code, collapse, origin) {
var this$1 = this;





    if (min != null && cm && this.collapsed) regChange(cm, min, max + 1);
this.lines.length = 0;
this.explicitlyCleared = true;
if (this.atomic && this.doc.cantEdit) {
this.doc.cantEdit = false;
if (cm) reCheckSelection(cm.doc);

    var changes = [], sel = this.sel
for (var i = 0; i < sel.ranges.length; i++) {
var range = sel.ranges[i]
changes[i] = {from: range.from(), to: range.to(), text: this$1.splitLines(code[i]), origin: origin}



    }

    }

    if (cm) signalLater(cm, "markerCleared", cm, this);
if (withOp) endOperation(cm);
if (this.parent) this.parent.clear();
};







    var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse)
for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
{ makeChange(this$1, changes[i$1]) }
if (newSel) { setSelectionReplaceHistory(this, newSel) }
else if (this.cm) { ensureCursorVisible(this.cm) }
}),
undo: docMethodOp(function() {makeChangeFromHistory(this, "undo")}),
redo: docMethodOp(function() {makeChangeFromHistory(this, "redo")}),
undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true)}),
redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true)}),





  // Find the position of the marker in the document. Returns a {from,
// to} object by default. Side can be passed to get a specific side
// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
// Pos objects returned contain a line object, rather than a line
// number (used to prevent looking up the same line twice).
TextMarker.prototype.find = function(side, lineObj) {
if (side == null && this.type == "bookmark") side = 1;
var from, to;
for (var i = 0; i < this.lines.length; ++i) {
var line = this.lines[i];
var span = getMarkedSpanFor(line.markedSpans, this);
if (span.from != null) {
from = Pos(lineObj ? line : lineNo(line), span.from);
if (side == -1) return from;
}
if (span.to != null) {
to = Pos(lineObj ? line : lineNo(line), span.to);
if (side == 1) return to;



































  setExtending: function(val) {this.extend = val},
getExtending: function() {return this.extend},

historySize: function() {
var hist = this.history, done = 0, undone = 0
for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done } }
for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone } }
return {undo: done, redo: undone}
},
clearHistory: function() {this.history = new History(this.history.maxGeneration)},

markClean: function() {
this.cleanGeneration = this.changeGeneration(true)
},
changeGeneration: function(forceSplit) {
if (forceSplit)
{ this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null }
return this.history.generation
},
isClean: function (gen) {
return this.history.generation == (gen || this.cleanGeneration)
},

getHistory: function() {
return {done: copyHistoryArray(this.history.done),
undone: copyHistoryArray(this.history.undone)}
},
setHistory: function(histData) {
var hist = this.history = new History(this.history.maxGeneration)
hist.done = copyHistoryArray(histData.done.slice(0), null, true)
hist.undone = copyHistoryArray(histData.undone.slice(0), null, true)
},

setGutterMarker: docMethodOp(function(line, gutterID, value) {
return changeLine(this, line, "gutter", function (line) {
var markers = line.gutterMarkers || (line.gutterMarkers = {})
markers[gutterID] = value
if (!value && isEmpty(markers)) { line.gutterMarkers = null }
return true
})
}),

clearGutter: docMethodOp(function(gutterID) {
var this$1 = this;

this.iter(function (line) {
if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
changeLine(this$1, line, "gutter", function () {
line.gutterMarkers[gutterID] = null
if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null }
return true
})

      }

      }

 
    })
}),

lineInfo: function(line) {
var n
if (typeof line == "number") {
if (!isLine(this, line)) { return null }
n = line
line = getLine(this, line)
if (!line) { return null }
} else {
n = lineNo(line)
if (n == null) { return null }

    }

    }

    return from && {from: from, to: to};
};



    return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
widgets: line.widgets}
},





  // Signals that the marker's widget changed, and surrounding layout
// should be recomputed.
TextMarker.prototype.changed = function() {
var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
if (!pos || !cm) return;
runInOp(cm, function() {
var line = pos.line, lineN = lineNo(pos.line);
var view = findViewForLine(cm, lineN);
if (view) {
clearLineMeasurementCacheFor(view);
cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;














  addLineClass: docMethodOp(function(handle, where, cls) {
return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
var prop = where == "text" ? "textClass"
: where == "background" ? "bgClass"
: where == "gutter" ? "gutterClass" : "wrapClass"
if (!line[prop]) { line[prop] = cls }
else if (classTest(cls).test(line[prop])) { return false }
else { line[prop] += " " + cls }
return true
})
}),
removeLineClass: docMethodOp(function(handle, where, cls) {
return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
var prop = where == "text" ? "textClass"
: where == "background" ? "bgClass"
: where == "gutter" ? "gutterClass" : "wrapClass"
var cur = line[prop]
if (!cur) { return false }
else if (cls == null) { line[prop] = null }
else {
var found = cur.match(classTest(cls))
if (!found) { return false }
var end = found.index + found[0].length
line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null

      }

      }

      cm.curOp.updateMaxLine = true;
if (!lineIsHidden(widget.doc, line) && widget.height != null) {
var oldHeight = widget.height;
widget.height = null;
var dHeight = widgetHeight(widget) - oldHeight;
if (dHeight)
updateLineHeight(line, line.height + dHeight);
}
});
};

      return true
})
}),












  TextMarker.prototype.attachLine = function(line) {
if (!this.lines.length && this.doc.cm) {
var op = this.doc.cm.curOp;
if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
(op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
}
this.lines.push(line);
};
TextMarker.prototype.detachLine = function(line) {
this.lines.splice(indexOf(this.lines, line), 1);
if (!this.lines.length && this.doc.cm) {
var op = this.doc.cm.curOp;
(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
}
};

  addLineWidget: docMethodOp(function(handle, node, options) {
return addLineWidget(this, handle, node, options)
}),
removeLineWidget: function(widget) { widget.clear() },
















  // Collapsed markers have unique ids, in order to be able to order
// them, which is needed for uniquely determining an outer marker
// when they overlap (they may nest, but not partially overlap).
var nextMarkerId = 0;













































  markText: function(from, to, options) {
return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
},
setBookmark: function(pos, options) {
var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
insertLeft: options && options.insertLeft,
clearWhenEmpty: false, shared: options && options.shared,
handleMouseEvents: options && options.handleMouseEvents}
pos = clipPos(this, pos)
return markText(this, pos, pos, realOpts, "bookmark")
},
findMarksAt: function(pos) {
pos = clipPos(this, pos)
var markers = [], spans = getLine(this, pos.line).markedSpans
if (spans) { for (var i = 0; i < spans.length; ++i) {
var span = spans[i]
if ((span.from == null || span.from <= pos.ch) &&
(span.to == null || span.to >= pos.ch))
{ markers.push(span.marker.parent || span.marker) }
} }
return markers
},
findMarks: function(from, to, filter) {
from = clipPos(this, from); to = clipPos(this, to)
var found = [], lineNo = from.line
this.iter(from.line, to.line + 1, function (line) {
var spans = line.markedSpans
if (spans) { for (var i = 0; i < spans.length; i++) {
var span = spans[i]
if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
span.from == null && lineNo != from.line ||
span.from != null && lineNo == to.line && span.from >= to.ch) &&
(!filter || filter(span.marker)))
{ found.push(span.marker.parent || span.marker) }
} }
++lineNo
})
return found
},
getAllMarks: function() {
var markers = []
this.iter(function (line) {
var sps = line.markedSpans
if (sps) { for (var i = 0; i < sps.length; ++i)
{ if (sps[i].from != null) { markers.push(sps[i].marker) } } }
})
return markers
},





  // Create a marker, wire it up to the right lines, and
function markText(doc, from, to, options, type) {
// Shared markers (across linked documents) are handled separately
// (markTextShared will call out to this again, once per
// document).
if (options && options.shared) return markTextShared(doc, from, to, options, type);
// Ensure we are in an operation.
if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);













  posFromIndex: function(off) {
var ch, lineNo = this.first, sepSize = this.lineSeparator().length
this.iter(function (line) {
var sz = line.text.length + sepSize
if (sz > off) { ch = off; return true }
off -= sz
++lineNo
})
return clipPos(this, Pos(lineNo, ch))
},
indexFromPos: function (coords) {
coords = clipPos(this, coords)
var index = coords.ch
if (coords.line < this.first || coords.ch < 0) { return 0 }
var sepSize = this.lineSeparator().length
this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
index += line.text.length + sepSize
})
return index
},





    var marker = new TextMarker(doc, type), diff = cmp(from, to);
if (options) copyObj(options, marker, false);
// Don't connect empty markers unless clearWhenEmpty is false
if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
return marker;
if (marker.replacedWith) {
// Showing up as a widget implies collapsed (widget replaces text)
marker.collapsed = true;
marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget");
if (!options.handleMouseEvents) marker.widgetNode.setAttribute("cm-ignore-events", "true");
if (options.insertLeft) marker.widgetNode.insertLeft = true;

  copy: function(copyHistory) {
var doc = new Doc(getLines(this, this.first, this.first + this.size),
this.modeOption, this.first, this.lineSep, this.direction)
doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft
doc.sel = this.sel
doc.extend = false
if (copyHistory) {
doc.history.undoDepth = this.history.undoDepth
doc.setHistory(this.getHistory())



    }

    }

    if (marker.collapsed) {
if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
throw new Error("Inserting collapsed marker partially overlapping an existing one");
sawCollapsedSpans = true;






























    return doc
},

linkedDoc: function(options) {
if (!options) { options = {} }
var from = this.first, to = this.first + this.size
if (options.from != null && options.from > from) { from = options.from }
if (options.to != null && options.to < to) { to = options.to }
var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction)
if (options.sharedHist) { copy.history = this.history
; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist})
copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]
copySharedMarkers(copy, findSharedMarkers(this))
return copy
},
unlinkDoc: function(other) {
var this$1 = this;

if (other instanceof CodeMirror) { other = other.doc }
if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
var link = this$1.linked[i]
if (link.doc != other) { continue }
this$1.linked.splice(i, 1)
other.unlinkDoc(this$1)
detachSharedMarkers(findSharedMarkers(this$1))
break
} }
// If the histories were shared, split them again
if (other.history == this.history) {
var splitIds = [other.id]
linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true)
other.history = new History(null)
other.history.done = copyHistoryArray(this.history.done, splitIds)
other.history.undone = copyHistoryArray(this.history.undone, splitIds)

    }

    }

 
  },
iterLinkedDocs: function(f) {linkedDocs(this, f)},





    if (marker.addToHistory)
addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN);

  getMode: function() {return this.mode},
getEditor: function() {return this.cm},





    var curLine = from.line, cm = doc.cm, updateMaxLine;
doc.iter(curLine, to.line + 1, function(line) {
if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
updateMaxLine = true;
if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
addMarkedSpan(line, new MarkedSpan(marker,
curLine == from.line ? from.ch : null,
curLine == to.line ? to.ch : null));
++curLine;
});
// lineIsHidden depends on the presence of the spans, so needs a second pass
if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
});

  splitLines: function(str) {
if (this.lineSep) { return str.split(this.lineSep) }
return splitLinesAuto(str)
},
lineSeparator: function() { return this.lineSep || "\n" },














    if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });








  setDirection: docMethodOp(function (dir) {
if (dir != "rtl") { dir = "ltr" }
if (dir == this.direction) { return }
this.direction = dir
this.iter(function (line) { return line.order = null; })
if (this.cm) { directionChanged(this.cm) }
})
})





    if (marker.readOnly) {
sawReadOnlySpans = true;
if (doc.history.done.length || doc.history.undone.length)
doc.clearHistory();





































// Public alias.
Doc.prototype.eachLine = Doc.prototype.iter

// Kludge to work around strange IE behavior where it'll sometimes
// re-fire a series of drag-related events right after the drop (#1551)
var lastDrop = 0

function onDrop(e) {
var cm = this
clearDragCursor(cm)
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
{ return }
e_preventDefault(e)
if (ie) { lastDrop = +new Date }
var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files
if (!pos || cm.isReadOnly()) { return }
// Might be a file drop, in which case we simply extract the text
// and insert it.
if (files && files.length && window.FileReader && window.File) {
var n = files.length, text = Array(n), read = 0
var loadFile = function (file, i) {
if (cm.options.allowDropFileTypes &&
indexOf(cm.options.allowDropFileTypes, file.type) == -1)
{ return }

var reader = new FileReader
reader.onload = operation(cm, function () {
var content = reader.result
if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = "" }
text[i] = content
if (++read == n) {
pos = clipPos(cm.doc, pos)
var change = {from: pos, to: pos,
text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
origin: "paste"}
makeChange(cm.doc, change)
setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)))
}
})
reader.readAsText(file)

    }

    }

    if (marker.collapsed) {
marker.id = ++nextMarkerId;
marker.atomic = true;






    for (var i = 0; i < n; ++i) { loadFile(files[i], i) }
} else { // Normal drop
// Don't do a replace if the drop happened inside of the selected text.
if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
cm.state.draggingText(e)
// Ensure the editor is re-focused
setTimeout(function () { return cm.display.input.focus(); }, 20)
return

    }

    }

    if (cm) {
// Sync editor state
if (updateMaxLine) cm.curOp.updateMaxLine = true;
if (marker.collapsed)
regChange(cm, from.line, to.line + 1);
else if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.css)
for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text");
if (marker.atomic) reCheckSelection(cm.doc);
signalLater(cm, "markerAdded", cm, marker);




    try {
var text$1 = e.dataTransfer.getData("Text")
if (text$1) {
var selected
if (cm.state.draggingText && !cm.state.draggingText.copy)
{ selected = cm.listSelections() }
setSelectionNoUndo(cm.doc, simpleSelection(pos, pos))
if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
{ replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag") } }
cm.replaceSelection(text$1, "around", "paste")
cm.display.input.focus()
}

    }

    }

    return marker;

    catch(e){}

  }

  }

 
}





  // SHARED TEXTMARKERS



function onDragStart(cm, e) {
if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }





  // A shared marker spans multiple linked documents. It is
// implemented as a meta-marker-object controlling multiple normal
// markers.
var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary) {
this.markers = markers;
this.primary = primary;
for (var i = 0; i < markers.length; ++i)
markers[i].parent = this;
};
eventMixin(SharedTextMarker);

  e.dataTransfer.setData("Text", cm.getSelection())
e.dataTransfer.effectAllowed = "copyMove"













  SharedTextMarker.prototype.clear = function() {
if (this.explicitlyCleared) return;
this.explicitlyCleared = true;
for (var i = 0; i < this.markers.length; ++i)
this.markers[i].clear();
signalLater(this, "clear");
};
SharedTextMarker.prototype.find = function(side, lineObj) {
return this.primary.find(side, lineObj);
};






  // Use dummy image instead of default browsers image.
// Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
if (e.dataTransfer.setDragImage && !safari) {
var img = elt("img", null, null, "position: fixed; left: 0; top: 0;")
img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
if (presto) {
img.width = img.height = 1
cm.display.wrapper.appendChild(img)
// Force a relayout, or Opera won't use our image for some obscure reason
img._top = img.offsetTop
}
e.dataTransfer.setDragImage(img, 0, 0)
if (presto) { img.parentNode.removeChild(img) }
}
}





  function markTextShared(doc, from, to, options, type) {
options = copyObj(options);
options.shared = false;
var markers = [markText(doc, from, to, options, type)], primary = markers[0];
var widget = options.widgetNode;
linkedDocs(doc, function(doc) {
if (widget) options.widgetNode = widget.cloneNode(true);
markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
for (var i = 0; i < doc.linked.length; ++i)
if (doc.linked[i].isParent) return;
primary = lst(markers);
});
return new SharedTextMarker(markers, primary);

function onDragOver(cm, e) {
var pos = posFromMouse(cm, e)
if (!pos) { return }
var frag = document.createDocumentFragment()
drawSelectionCursor(cm, pos, frag)
if (!cm.display.dragCursor) {
cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors")
cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv)






  }

  }

 
  removeChildrenAndAdd(cm.display.dragCursor, frag)
}





  function findSharedMarkers(doc) {
return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())),
function(m) { return m.parent; });


function clearDragCursor(cm) {
if (cm.display.dragCursor) {
cm.display.lineSpace.removeChild(cm.display.dragCursor)
cm.display.dragCursor = null

  }

  }

 
}





  function copySharedMarkers(doc, markers) {
for (var i = 0; i < markers.length; i++) {
var marker = markers[i], pos = marker.find();
var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
if (cmp(mFrom, mTo)) {
var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
marker.markers.push(subMark);
subMark.parent = marker;










































































































































// These must be handled carefully, because naively registering a
// handler for each editor will cause the editors to never be
// garbage collected.

function forEachCodeMirror(f) {
if (!document.getElementsByClassName) { return }
var byClass = document.getElementsByClassName("CodeMirror")
for (var i = 0; i < byClass.length; i++) {
var cm = byClass[i].CodeMirror
if (cm) { f(cm) }
}
}

var globalsRegistered = false
function ensureGlobalHandlers() {
if (globalsRegistered) { return }
registerGlobalHandlers()
globalsRegistered = true
}
function registerGlobalHandlers() {
// When the window resizes, we need to refresh active editors.
var resizeTimer
on(window, "resize", function () {
if (resizeTimer == null) { resizeTimer = setTimeout(function () {
resizeTimer = null
forEachCodeMirror(onResize)
}, 100) }
})
// When the window loses focus, we want to show the editor as blurred
on(window, "blur", function () { return forEachCodeMirror(onBlur); })
}
// Called when the window resizes
function onResize(cm) {
var d = cm.display
if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth)
{ return }
// Might be a text scaling operation, clear size caches.
d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null
d.scrollbarsClipped = false
cm.setSize()
}

var keyNames = {
3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 127: "Delete",
173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
}

// Number keys
for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i) }
// Alphabetic keys
for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1) }
// Function keys
for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2 }

var keyMap = {}

keyMap.basic = {
"Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
"End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
"Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
"Tab": "defaultTab", "Shift-Tab": "indentAuto",
"Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
"Esc": "singleSelection"
}
// Note that the save and find-related commands aren't defined by
// default. User code or addons can define them. Unknown commands
// are simply ignored.
keyMap.pcDefault = {
"Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
"Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
"Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
"Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
"Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
"Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
"Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
fallthrough: "basic"
}
// Very basic readline/emacs-style bindings, which are standard on Mac.
keyMap.emacsy = {
"Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
"Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
"Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
"Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
"Ctrl-O": "openLine"
}
keyMap.macDefault = {
"Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
"Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
"Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
"Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
"Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
"Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
"Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
fallthrough: ["basic", "emacsy"]
}
keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault

// KEYMAP DISPATCH

function normalizeKeyName(name) {
var parts = name.split(/-(?!$)/)
name = parts[parts.length - 1]
var alt, ctrl, shift, cmd
for (var i = 0; i < parts.length - 1; i++) {
var mod = parts[i]
if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true }
else if (/^a(lt)?$/i.test(mod)) { alt = true }
else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true }
else if (/^s(hift)?$/i.test(mod)) { shift = true }
else { throw new Error("Unrecognized modifier name: " + mod) }
}
if (alt) { name = "Alt-" + name }
if (ctrl) { name = "Ctrl-" + name }
if (cmd) { name = "Cmd-" + name }
if (shift) { name = "Shift-" + name }
return name
}

// This is a kludge to keep keymaps mostly working as raw objects
// (backwards compatibility) while at the same time support features
// like normalization and multi-stroke key bindings. It compiles a
// new normalized keymap, and then updates the old object to reflect
// this.
function normalizeKeyMap(keymap) {
var copy = {}
for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
var value = keymap[keyname]
if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
if (value == "...") { delete keymap[keyname]; continue }

var keys = map(keyname.split(" "), normalizeKeyName)
for (var i = 0; i < keys.length; i++) {
var val = (void 0), name = (void 0)
if (i == keys.length - 1) {
name = keys.join(" ")
val = value
} else {
name = keys.slice(0, i + 1).join(" ")
val = "..."

      }

      }

 
      var prev = copy[name]
if (!prev) { copy[name] = val }
else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
}
delete keymap[keyname]
} }
for (var prop in copy) { keymap[prop] = copy[prop] }
return keymap
}

function lookupKey(key, map, handle, context) {
map = getKeyMap(map)
var found = map.call ? map.call(key, context) : map[key]
if (found === false) { return "nothing" }
if (found === "...") { return "multi" }
if (found != null && handle(found)) { return "handled" }

if (map.fallthrough) {
if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
{ return lookupKey(key, map.fallthrough, handle, context) }
for (var i = 0; i < map.fallthrough.length; i++) {
var result = lookupKey(key, map.fallthrough[i], handle, context)
if (result) { return result }

    }
}

    }
}

 
}





  function detachSharedMarkers(markers) {
for (var i = 0; i < markers.length; i++) {
var marker = markers[i], linked = [marker.primary.doc];;
linkedDocs(marker.primary.doc, function(d) { linked.push(d); });
for (var j = 0; j < marker.markers.length; j++) {
var subMarker = marker.markers[j];
if (indexOf(linked, subMarker.doc) == -1) {
subMarker.parent = null;
marker.markers.splice(j--, 1);
}
































// Modifier key presses don't count as 'real' key presses for the
// purpose of keymap fallthrough.
function isModifierKey(value) {
var name = typeof value == "string" ? value : keyNames[value.keyCode]
return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
}

function addModifierNames(name, event, noShift) {
var base = name
if (event.altKey && base != "Alt") { name = "Alt-" + name }
if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name }
if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name }
if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name }
return name
}

// Look up the name of a key as indicated by an event object.
function keyName(event, noShift) {
if (presto && event.keyCode == 34 && event["char"]) { return false }
var name = keyNames[event.keyCode]
if (name == null || event.altGraphKey) { return false }
return addModifierNames(name, event, noShift)
}

function getKeyMap(val) {
return typeof val == "string" ? keyMap[val] : val
}

// Helper for deleting text near the selection(s), used to implement
// backspace, delete, and similar functionality.
function deleteNearSelection(cm, compute) {
var ranges = cm.doc.sel.ranges, kill = []
// Build up a set of ranges to kill first, merging overlapping
// ranges.
for (var i = 0; i < ranges.length; i++) {
var toKill = compute(ranges[i])
while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
var replaced = kill.pop()
if (cmp(replaced.from, toKill.from) < 0) {
toKill.from = replaced.from
break

      }
}

      }
}

 
    kill.push(toKill)

  }

  }

 
  // Next, remove those actual ranges.
runInOp(cm, function () {
for (var i = kill.length - 1; i >= 0; i--)
{ replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete") }
ensureCursorVisible(cm)
})
}





  // TEXTMARKER SPANS




function moveCharLogically(line, ch, dir) {
var target = skipExtendingChars(line.text, ch + dir, dir)
return target < 0 || target > line.text.length ? null : target
}





  function MarkedSpan(marker, from, to) {
this.marker = marker;
this.from = from; this.to = to;
}

function moveLogically(line, start, dir) {
var ch = moveCharLogically(line, start.ch, dir)
return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
}





  // Search an array of spans for a span matching the given marker.
function getMarkedSpanFor(spans, marker) {
if (spans) for (var i = 0; i < spans.length; ++i) {
var span = spans[i];
if (span.marker == marker) return span;


















function endOfLine(visually, cm, lineObj, lineNo, dir) {
if (visually) {
var order = getOrder(lineObj, cm.doc.direction)
if (order) {
var part = dir < 0 ? lst(order) : order[0]
var moveInStorageOrder = (dir < 0) == (part.level == 1)
var sticky = moveInStorageOrder ? "after" : "before"
var ch
// With a wrapped rtl chunk (possibly spanning multiple bidi parts),
// it could be that the last bidi part is not on the last visual line,
// since visual lines contain content order-consecutive chunks.
// Thus, in rtl, we are looking for the first (content-order) character
// in the rtl chunk that is on the last line (that is, the same line
// as the last (content-order) character).
if (part.level > 0) {
var prep = prepareMeasureForLine(cm, lineObj)
ch = dir < 0 ? lineObj.text.length - 1 : 0
var targetTop = measureCharPrepared(cm, prep, ch).top
ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch)
if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1) }
} else { ch = dir < 0 ? part.to : part.from }
return new Pos(lineNo, ch, sticky)

    }
}

    }
}

  // Remove a span from an array, returning undefined if no spans are
// left (we don't store arrays for lines without spans).
function removeMarkedSpan(spans, span) {
for (var r, i = 0; i < spans.length; ++i)
if (spans[i] != span) (r || (r = [])).push(spans[i]);
return r;







  return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
}

function moveVisually(cm, line, start, dir) {
var bidi = getOrder(line, cm.doc.direction)
if (!bidi) { return moveLogically(line, start, dir) }
if (start.ch >= line.text.length) {
start.ch = line.text.length
start.sticky = "before"
} else if (start.ch <= 0) {
start.ch = 0
start.sticky = "after"

  }

  }

  // Add a span to a line.
function addMarkedSpan(line, span) {
line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
span.marker.attachLine(line);


  var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos]
if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
// Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
// nothing interesting happens.
return moveLogically(line, start, dir)

  }


  }


  // Used for the algorithm that adjusts markers for a change in the
// document. These functions cut an array of spans at a given
// character position, returning an array of remaining chunks (or
// undefined if nothing remains).
function markedSpansBefore(old, startCh, isInsert) {
if (old) for (var i = 0, nw; i < old.length; ++i) {
var span = old[i], marker = span.marker;
var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
}





  var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); }
var prep
var getWrappedLineExtent = function (ch) {
if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
prep = prep || prepareMeasureForLine(cm, line)
return wrappedLineExtentChar(cm, line, prep, ch)
}
var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch)

if (cm.doc.direction == "rtl" || part.level == 1) {
var moveInStorageOrder = (part.level == 1) == (dir < 0)
var ch = mv(start, moveInStorageOrder ? 1 : -1)
if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
// Case 2: We move within an rtl part or in an rtl editor on the same visual line
var sticky = moveInStorageOrder ? "before" : "after"
return new Pos(start.line, ch, sticky)

    }

    }

    return nw;

 
  }

  }

  function markedSpansAfter(old, endCh, isInsert) {
if (old) for (var i = 0, nw; i < old.length; ++i) {
var span = old[i], marker = span.marker;
var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
span.to == null ? null : span.to - endCh));
}









// Case 3: Could not move within this bidi part in this visual line, so leave
// the current bidi part

var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
? new Pos(start.line, mv(ch, 1), "before")
: new Pos(start.line, ch, "after"); }

for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
var part = bidi[partPos]
var moveInStorageOrder = (dir > 0) == (part.level != 1)
var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1)
if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
ch = moveInStorageOrder ? part.from : mv(part.to, -1)
if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }

    }

    }

    return nw;

 
  }


  }


  // Given a change object, compute the new set of marker spans that
// cover the line in which the change took place. Removes spans
// entirely within the change, reconnects spans belonging to the
// same marker that appear on both sides of the change, and cuts off
// spans partially within the change. Returns an array of span
// arrays with one element for each line in (after) the change.
function stretchSpansOverChange(doc, change) {
if (change.full) return null;
var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
if (!oldFirst && !oldLast) return null;

  // Case 3a: Look for other bidi parts on the same visual line
var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent)
if (res) { return res }













    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
// Get the spans that 'stick out' on both sides
var first = markedSpansBefore(oldFirst, startCh, isInsert);
var last = markedSpansAfter(oldLast, endCh, isInsert);



  // Case 3b: Look for other bidi parts on the next visual line
var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1)
if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh))
if (res) { return res }
}





    // Next, merge those two ends
var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
if (first) {
// Fix up .to properties of first
for (var i = 0; i < first.length; ++i) {
var span = first[i];
if (span.to == null) {
var found = getMarkedSpanFor(last, span.marker);
if (!found) span.to = startCh;
else if (sameLine) span.to = found.to == null ? null : found.to + offset;
}
}







  // Case 4: Nowhere to move
return null
}

// Commands are parameter-less actions that can be performed on an
// editor, mostly used for keybindings.
var commands = {
selectAll: selectAll,
singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
killLine: function (cm) { return deleteNearSelection(cm, function (range) {
if (range.empty()) {
var len = getLine(cm.doc, range.head.line).text.length
if (range.head.ch == len && range.head.line < cm.lastLine())
{ return {from: range.head, to: Pos(range.head.line + 1, 0)} }
else
{ return {from: range.head, to: Pos(range.head.line, len)} }
} else {
return {from: range.from(), to: range.to()}

    }

    }

    if (last) {
// Fix up .from in last (or move them into first in case of sameLine)
for (var i = 0; i < last.length; ++i) {
var span = last[i];
if (span.to != null) span.to += offset;
if (span.from == null) {
var found = getMarkedSpanFor(first, span.marker);
if (!found) {
span.from = offset;
if (sameLine) (first || (first = [])).push(span);


































































































  }); },
deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
from: Pos(range.from().line, 0),
to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
}); }); },
delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
from: Pos(range.from().line, 0), to: range.from()
}); }); },
delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
var top = cm.charCoords(range.head, "div").top + 5
var leftPos = cm.coordsChar({left: 0, top: top}, "div")
return {from: leftPos, to: range.from()}
}); },
delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
var top = cm.charCoords(range.head, "div").top + 5
var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
return {from: range.from(), to: rightPos }
}); },
undo: function (cm) { return cm.undo(); },
redo: function (cm) { return cm.redo(); },
undoSelection: function (cm) { return cm.undoSelection(); },
redoSelection: function (cm) { return cm.redoSelection(); },
goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
{origin: "+move", bias: 1}
); },
goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
{origin: "+move", bias: 1}
); },
goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
{origin: "+move", bias: -1}
); },
goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
var top = cm.cursorCoords(range.head, "div").top + 5
return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
}, sel_move); },
goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
var top = cm.cursorCoords(range.head, "div").top + 5
return cm.coordsChar({left: 0, top: top}, "div")
}, sel_move); },
goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
var top = cm.cursorCoords(range.head, "div").top + 5
var pos = cm.coordsChar({left: 0, top: top}, "div")
if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
return pos
}, sel_move); },
goLineUp: function (cm) { return cm.moveV(-1, "line"); },
goLineDown: function (cm) { return cm.moveV(1, "line"); },
goPageUp: function (cm) { return cm.moveV(-1, "page"); },
goPageDown: function (cm) { return cm.moveV(1, "page"); },
goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
goCharRight: function (cm) { return cm.moveH(1, "char"); },
goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
goColumnRight: function (cm) { return cm.moveH(1, "column"); },
goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
goGroupRight: function (cm) { return cm.moveH(1, "group"); },
goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
goWordRight: function (cm) { return cm.moveH(1, "word"); },
delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
indentAuto: function (cm) { return cm.indentSelection("smart"); },
indentMore: function (cm) { return cm.indentSelection("add"); },
indentLess: function (cm) { return cm.indentSelection("subtract"); },
insertTab: function (cm) { return cm.replaceSelection("\t"); },
insertSoftTab: function (cm) {
var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize
for (var i = 0; i < ranges.length; i++) {
var pos = ranges[i].from()
var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize)
spaces.push(spaceStr(tabSize - col % tabSize))
}
cm.replaceSelections(spaces)
},
defaultTab: function (cm) {
if (cm.somethingSelected()) { cm.indentSelection("add") }
else { cm.execCommand("insertTab") }
},
// Swap the two chars left and right of each selection's head.
// Move cursor behind the two swapped characters afterwards.
//
// Doesn't consider line feeds a character.
// Doesn't scan more than one line above to find a character.
// Doesn't do anything on an empty line.
// Doesn't do anything with non-empty selections.
transposeChars: function (cm) { return runInOp(cm, function () {
var ranges = cm.listSelections(), newSel = []
for (var i = 0; i < ranges.length; i++) {
if (!ranges[i].empty()) { continue }
var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text
if (line) {
if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1) }
if (cur.ch > 0) {
cur = new Pos(cur.line, cur.ch + 1)
cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
Pos(cur.line, cur.ch - 2), cur, "+transpose")
} else if (cur.line > cm.doc.first) {
var prev = getLine(cm.doc, cur.line - 1).text
if (prev) {
cur = new Pos(cur.line, 1)
cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
prev.charAt(prev.length - 1),
Pos(cur.line - 1, prev.length - 1), cur, "+transpose")

          }

          }

        } else {
span.from += offset;
if (sameLine) (first || (first = [])).push(span);

 
        }
}

        }
}

 
      newSel.push(new Range(cur, cur))

    }

    }

    // Make sure we didn't create any zero-length spans
if (first) first = clearEmptySpans(first);
if (last && last != first) last = clearEmptySpans(last);












    cm.setSelections(newSel)
}); },
newlineAndIndent: function (cm) { return runInOp(cm, function () {
var sels = cm.listSelections()
for (var i = sels.length - 1; i >= 0; i--)
{ cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input") }
sels = cm.listSelections()
for (var i$1 = 0; i$1 < sels.length; i$1++)
{ cm.indentLine(sels[i$1].from().line, null, true) }
ensureCursorVisible(cm)
}); },
openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
}





    var newMarkers = [first];
if (!sameLine) {
// Fill gap with whole-line-spans
var gap = change.text.length - 2, gapMarkers;
if (gap > 0 && first)
for (var i = 0; i < first.length; ++i)
if (first[i].to == null)
(gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marker, null, null));
for (var i = 0; i < gap; ++i)
newMarkers.push(gapMarkers);
newMarkers.push(last);
}
return newMarkers;










function lineStart(cm, lineN) {
var line = getLine(cm.doc, lineN)
var visual = visualLine(line)
if (visual != line) { lineN = lineNo(visual) }
return endOfLine(true, cm, visual, lineN, 1)
}
function lineEnd(cm, lineN) {
var line = getLine(cm.doc, lineN)
var visual = visualLineEnd(line)
if (visual != line) { lineN = lineNo(visual) }
return endOfLine(true, cm, line, lineN, -1)
}
function lineStartSmart(cm, pos) {
var start = lineStart(cm, pos.line)
var line = getLine(cm.doc, start.line)
var order = getOrder(line, cm.doc.direction)
if (!order || order[0].level == 0) {
var firstNonWS = Math.max(0, line.text.search(/\S/))
var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch
return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)

  }

  }

 
  return start
}





  // Remove spans that are empty and don't have a clearWhenEmpty
// option of false.
function clearEmptySpans(spans) {
for (var i = 0; i < spans.length; ++i) {
var span = spans[i];
if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
spans.splice(i--, 1);
}
if (!spans.length) return null;
return spans;

// Run a handler that was bound to a key.
function doHandleBinding(cm, bound, dropShift) {
if (typeof bound == "string") {
bound = commands[bound]
if (!bound) { return false }






  }

  }

 
  // Ensure previous input has been read, so that the handler sees a
// consistent view of the document
cm.display.input.ensurePolled()
var prevShift = cm.display.shift, done = false
try {
if (cm.isReadOnly()) { cm.state.suppressEdits = true }
if (dropShift) { cm.display.shift = false }
done = bound(cm) != Pass
} finally {
cm.display.shift = prevShift
cm.state.suppressEdits = false
}
return done
}





  // Used for un/re-doing changes from the history. Combines the
// result of computing the existing spans with the set of spans that
// existed in the history (so that deleting around a span and then
// undoing brings back the span).
function mergeOldSpans(doc, change) {
var old = getOldSpans(doc, change);
var stretched = stretchSpansOverChange(doc, change);
if (!old) return stretched;
if (!stretched) return old;

function lookupKeyForEditor(cm, name, handle) {
for (var i = 0; i < cm.state.keyMaps.length; i++) {
var result = lookupKey(name, cm.state.keyMaps[i], handle, cm)
if (result) { return result }
}
return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
|| lookupKey(name, cm.options.keyMap, handle, cm)
}






    for (var i = 0; i < old.length; ++i) {
var oldCur = old[i], stretchCur = stretched[i];
if (oldCur && stretchCur) {
spans: for (var j = 0; j < stretchCur.length; ++j) {
var span = stretchCur[j];
for (var k = 0; k < oldCur.length; ++k)
if (oldCur[k].marker == span.marker) continue spans;
oldCur.push(span);
}
} else if (stretchCur) {
old[i] = stretchCur;


// Note that, despite the name, this function is also used to check
// for bound mouse clicks.

var stopSeq = new Delayed
function dispatchKey(cm, name, e, handle) {
var seq = cm.state.keySeq
if (seq) {
if (isModifierKey(name)) { return "handled" }
stopSeq.set(50, function () {
if (cm.state.keySeq == seq) {
cm.state.keySeq = null
cm.display.input.reset()

      }

      }

    }
return old;

    })
name = seq + " " + name

  }

  }

 
  var result = lookupKeyForEditor(cm, name, handle)





  // Used to 'clip' out readOnly ranges when making a change.
function removeReadOnlyRanges(doc, from, to) {
var markers = null;
doc.iter(from.line, to.line + 1, function(line) {
if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
var mark = line.markedSpans[i].marker;
if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
(markers || (markers = [])).push(mark);
}
});
if (!markers) return null;
var parts = [{from: from, to: to}];
for (var i = 0; i < markers.length; ++i) {
var mk = markers[i], m = mk.find(0);
for (var j = 0; j < parts.length; ++j) {
var p = parts[j];
if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue;
var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
newParts.push({from: p.from, to: m.from});
if (dto > 0 || !mk.inclusiveRight && !dto)
newParts.push({from: m.to, to: p.to});
parts.splice.apply(parts, newParts);
j += newParts.length - 1;
}
}
return parts;

  if (result == "multi")
{ cm.state.keySeq = name }
if (result == "handled")
{ signalLater(cm, "keyHandled", cm, name, e) }

if (result == "handled" || result == "multi") {
e_preventDefault(e)
restartBlink(cm)




















  }


  }


  // Connect or disconnect spans from a line.
function detachMarkedSpans(line) {
var spans = line.markedSpans;
if (!spans) return;
for (var i = 0; i < spans.length; ++i)
spans[i].marker.detachLine(line);
line.markedSpans = null;
}
function attachMarkedSpans(line, spans) {
if (!spans) return;
for (var i = 0; i < spans.length; ++i)
spans[i].marker.attachLine(line);
line.markedSpans = spans;

  if (seq && !result && /\'$/.test(name)) {
e_preventDefault(e)
return true











  }

  }

 
  return !!result
}





  // Helpers used when computing which overlapping collapsed span
// counts as the larger one.
function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }

// Handle a key from the keydown event.
function handleKeyBinding(cm, e) {
var name = keyName(e, true)
if (!name) { return false }





  // Returns a number indicating which of two overlapping collapsed
// spans is larger (and thus includes the other). Falls back to
// comparing ids when the spans cover exactly the same range.
function compareCollapsedMarkers(a, b) {
var lenDiff = a.lines.length - b.lines.length;
if (lenDiff != 0) return lenDiff;
var aPos = a.find(), bPos = b.find();
var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
if (fromCmp) return -fromCmp;
var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
if (toCmp) return toCmp;
return b.id - a.id;

  if (e.shiftKey && !cm.state.keySeq) {
// First try to resolve full name (including 'Shift-'). Failing
// that, see if there is a cursor-motion command (starting with
// 'go') bound to the keyname without 'Shift-'.
return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
|| dispatchKey(cm, name, e, function (b) {
if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
{ return doHandleBinding(cm, b) }
})
} else {
return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })


  }

  }

 
}





  // Find out whether a line ends or starts in a collapsed span. If
// so, return the marker for that span.
function collapsedSpanAtSide(line, start) {
var sps = sawCollapsedSpans && line.markedSpans, found;
if (sps) for (var sp, i = 0; i < sps.length; ++i) {
sp = sps[i];
if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
(!found || compareCollapsedMarkers(found, sp.marker) < 0))
found = sp.marker;
}
return found;
}
function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }

// Handle a key from the keypress event
function handleCharBinding(cm, e, ch) {
return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
}















  // Test whether there exists a collapsed span that partially
// overlaps (covers the start or end, but not both) of a new span.
// Such overlap is not allowed.
function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
var line = getLine(doc, lineNo);
var sps = sawCollapsedSpans && line.markedSpans;
if (sps) for (var i = 0; i < sps.length; ++i) {
var sp = sps[i];
if (!sp.marker.collapsed) continue;
var found = sp.marker.find(0);
var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
if (fromCmp <= 0 && (cmp(found.to, from) > 0 || (sp.marker.inclusiveRight && marker.inclusiveLeft)) ||
fromCmp >= 0 && (cmp(found.from, to) < 0 || (sp.marker.inclusiveLeft && marker.inclusiveRight)))
return true;
}

var lastStoppedKey = null
function onKeyDown(e) {
var cm = this
cm.curOp.focus = activeElt()
if (signalDOMEvent(cm, e)) { return }
// IE does strange things with escape.
if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false }
var code = e.keyCode
cm.display.shift = code == 16 || e.shiftKey
var handled = handleKeyBinding(cm, e)
if (presto) {
lastStoppedKey = handled ? code : null
// Opera has no cut event... we try to at least catch the key combo
if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
{ cm.replaceSelection("", null, "cut") }



  }


  }


  // A visual line is a line as drawn on the screen. Folding, for
// example, can cause multiple logical lines to appear on the same
// visual line. This finds the start of the visual line that the
// given line is part of (usually that is the line itself).
function visualLine(line) {
var merged;
while (merged = collapsedSpanAtStart(line))
line = merged.find(-1, true).line;
return line;
}

  // Turn mouse into crosshair when Alt is held on Mac.
if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
{ showCrossHair(cm) }
}

function showCrossHair(cm) {
var lineDiv = cm.display.lineDiv
addClass(lineDiv, "CodeMirror-crosshair")







  // Returns an array of logical lines that continue the visual line
// started by the argument, or undefined if there are no such lines.
function visualLineContinued(line) {
var merged, lines;
while (merged = collapsedSpanAtEnd(line)) {
line = merged.find(1, true).line;
(lines || (lines = [])).push(line);

  function up(e) {
if (e.keyCode == 18 || !e.altKey) {
rmClass(lineDiv, "CodeMirror-crosshair")
off(document, "keyup", up)
off(document, "mouseover", up)



    }

    }

    return lines;

 
  }

  }

 
  on(document, "keyup", up)
on(document, "mouseover", up)
}





  // Get the line number of the start of the visual line that the
// given line number is part of.
function visualLineNo(doc, lineN) {
var line = getLine(doc, lineN), vis = visualLine(line);
if (line == vis) return lineN;
return lineNo(vis);
}
// Get the line number of the start of the next visual line after
// the given line.
function visualLineEndNo(doc, lineN) {
if (lineN > doc.lastLine()) return lineN;
var line = getLine(doc, lineN), merged;
if (!lineIsHidden(doc, line)) return lineN;
while (merged = collapsedSpanAtEnd(line))
line = merged.find(1, true).line;
return lineNo(line) + 1;
}

function onKeyUp(e) {
if (e.keyCode == 16) { this.doc.sel.shift = false }
signalDOMEvent(this, e)
}


















  // Compute whether a line is hidden. Lines count as hidden when they
// are part of a visual line that starts with another line, or when
// they are entirely covered by collapsed, non-widget span.
function lineIsHidden(doc, line) {
var sps = sawCollapsedSpans && line.markedSpans;
if (sps) for (var sp, i = 0; i < sps.length; ++i) {
sp = sps[i];
if (!sp.marker.collapsed) continue;
if (sp.from == null) return true;
if (sp.marker.widgetNode) continue;
if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
return true;
}
}
function lineIsHiddenInner(doc, line, span) {
if (span.to == null) {
var end = span.marker.find(1, true);
return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker));
}
if (span.marker.inclusiveRight && span.to == line.text.length)
return true;
for (var sp, i = 0; i < line.markedSpans.length; ++i) {
sp = line.markedSpans[i];
if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
(sp.to == null || sp.to != span.from) &&
(sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
lineIsHiddenInner(doc, line, sp)) return true;
}
}

function onKeyPress(e) {
var cm = this
if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
var keyCode = e.keyCode, charCode = e.charCode
if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
var ch = String.fromCharCode(charCode == null ? keyCode : charCode)
// Some browsers fire keypress events for backspace
if (ch == "\x08") { return }
if (handleCharBinding(cm, e, ch)) { return }
cm.display.input.onKeyPress(e)
}






















  // LINE WIDGETS

var DOUBLECLICK_DELAY = 400





  // Line widgets are block elements displayed above or below a line.





var PastClick = function(time, pos, button) {
this.time = time
this.pos = pos
this.button = button
};





  var LineWidget = CodeMirror.LineWidget = function(cm, node, options) {
if (options) for (var opt in options) if (options.hasOwnProperty(opt))
this[opt] = options[opt];
this.cm = cm;
this.node = node;
};
eventMixin(LineWidget);

PastClick.prototype.compare = function (time, pos, button) {
return this.time + DOUBLECLICK_DELAY > time &&
cmp(pos, this.pos) == 0 && button == this.button
};








  function adjustScrollWhenAboveVisible(cm, line, diff) {
if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
addToScrollPos(cm, null, diff);













var lastClick;
var lastDoubleClick;
function clickRepeat(pos, button) {
var now = +new Date
if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
lastClick = lastDoubleClick = null
return "triple"
} else if (lastClick && lastClick.compare(now, pos, button)) {
lastDoubleClick = new PastClick(now, pos, button)
lastClick = null
return "double"
} else {
lastClick = new PastClick(now, pos, button)
lastDoubleClick = null
return "single"

  }

  }

 
}





  LineWidget.prototype.clear = function() {
var cm = this.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
if (no == null || !ws) return;
for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
if (!ws.length) line.widgets = null;
var height = widgetHeight(this);
runInOp(cm, function() {
adjustScrollWhenAboveVisible(cm, line, -height);
regLineChange(cm, no, "widget");
updateLineHeight(line, Math.max(0, line.height - height));
});
};
LineWidget.prototype.changed = function() {
var oldH = this.height, cm = this.cm, line = this.line;
this.height = null;
var diff = widgetHeight(this) - oldH;
if (!diff) return;
runInOp(cm, function() {
cm.curOp.forceUpdate = true;
adjustScrollWhenAboveVisible(cm, line, diff);
updateLineHeight(line, line.height + diff);
});
};

// A mouse down can be a single click, double click, triple click,
// start of selection drag, start of text drag, new cursor
// (ctrl-click), rectangle drag (alt-drag), or xwin
// middle-click-paste. Or it might be a click on something we should
// not interfere with, such as a scrollbar or widget.
function onMouseDown(e) {
var cm = this, display = cm.display
if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
display.input.ensurePolled()
display.shift = e.shiftKey


















  function widgetHeight(widget) {
if (widget.height != null) return widget.height;
if (!contains(document.body, widget.node)) {
var parentStyle = "position: relative;";
if (widget.coverGutter)
parentStyle += "margin-left: -" + widget.cm.display.gutters.offsetWidth + "px;";
if (widget.noHScroll)
parentStyle += "width: " + widget.cm.display.wrapper.clientWidth + "px;";
removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, parentStyle));

  if (eventInWidget(display, e)) {
if (!webkit) {
// Briefly turn off draggability, to allow widgets to do
// normal dragging things.
display.scroller.draggable = false
setTimeout(function () { return display.scroller.draggable = true; }, 100)




    }

    }

    return widget.height = widget.node.offsetHeight;

    return

  }

  }

 
  if (clickInGutter(cm, e)) { return }
var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single"
window.focus()





  function addLineWidget(cm, handle, node, options) {
var widget = new LineWidget(cm, node, options);
if (widget.noHScroll) cm.display.alignWidgets = true;
changeLine(cm.doc, handle, "widget", function(line) {
var widgets = line.widgets || (line.widgets = []);
if (widget.insertAt == null) widgets.push(widget);
else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
widget.line = line;
if (!lineIsHidden(cm.doc, line)) {
var aboveVisible = heightAtLine(line) < cm.doc.scrollTop;
updateLineHeight(line, line.height + widgetHeight(widget));
if (aboveVisible) addToScrollPos(cm, null, widget.height);
cm.curOp.forceUpdate = true;
}
return true;
});
return widget;

  // #3261: make sure, that we're not starting a second selection
if (button == 1 && cm.state.selectingText)
{ cm.state.selectingText(e) }

if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }

if (button == 1) {
if (pos) { leftButtonDown(cm, pos, repeat, e) }
else if (e_target(e) == display.scroller) { e_preventDefault(e) }
} else if (button == 2) {
if (pos) { extendSelection(cm.doc, pos) }
setTimeout(function () { return display.input.focus(); }, 20)
} else if (button == 3) {
if (captureRightClick) { onContextMenu(cm, e) }
else { delayBlurEvent(cm) }



  }

  }

 
}





  // LINE DATA STRUCTURE





function handleMappedButton(cm, button, pos, repeat, event) {
var name = "Click"
if (repeat == "double") { name = "Double" + name }
else if (repeat == "triple") { name = "Triple" + name }
name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name





  // Line objects. These hold state related to a line, including
// highlighting info (the styles array).
var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
this.text = text;
attachMarkedSpans(this, markedSpans);
this.height = estimateHeight ? estimateHeight(this) : 1;
};
eventMixin(Line);
Line.prototype.lineNo = function() { return lineNo(this); };





  return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
if (typeof bound == "string") { bound = commands[bound] }
if (!bound) { return false }
var done = false
try {
if (cm.isReadOnly()) { cm.state.suppressEdits = true }
done = bound(cm, pos) != Pass
} finally {
cm.state.suppressEdits = false
}
return done
})
}





  // Change the content (text, markers) of a line. Automatically
// invalidates cached information and tries to re-estimate the
// line's height.
function updateLine(line, text, markedSpans, estimateHeight) {
line.text = text;
if (line.stateAfter) line.stateAfter = null;
if (line.styles) line.styles = null;
if (line.order != null) line.order = null;
detachMarkedSpans(line);
attachMarkedSpans(line, markedSpans);
var estHeight = estimateHeight ? estimateHeight(line) : 1;
if (estHeight != line.height) updateLineHeight(line, estHeight);

function configureMouse(cm, repeat, event) {
var option = cm.getOption("configureMouse")
var value = option ? option(cm, repeat, event) : {}
if (value.unit == null) {
var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey
value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line"







  }

  }

 
  if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey }
if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey }
if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey) }
return value
}





  // Detach a line from the document tree and its markers.
function cleanUpLine(line) {
line.parent = null;
detachMarkedSpans(line);
}

function leftButtonDown(cm, pos, repeat, event) {
if (ie) { setTimeout(bind(ensureFocus, cm), 0) }
else { cm.curOp.focus = activeElt() }







  function extractLineClasses(type, output) {
if (type) for (;;) {
var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
if (!lineClass) break;
type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
var prop = lineClass[1] ? "bgClass" : "textClass";
if (output[prop] == null)
output[prop] = lineClass[2];
else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
output[prop] += " " + lineClass[2];























  var behavior = configureMouse(cm, repeat, event)

var sel = cm.doc.sel, contained
if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
repeat == "single" && (contained = sel.contains(pos)) > -1 &&
(cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
(cmp(contained.to(), pos) > 0 || pos.xRel < 0))
{ leftButtonStartDrag(cm, event, pos, behavior) }
else
{ leftButtonSelect(cm, event, pos, behavior) }
}

// Start a text drag. When it ends, see if any dragging actually
// happen, and treat as a click if it didn't.
function leftButtonStartDrag(cm, event, pos, behavior) {
var display = cm.display, moved = false
var dragEnd = operation(cm, function (e) {
if (webkit) { display.scroller.draggable = false }
cm.state.draggingText = false
off(document, "mouseup", dragEnd)
off(document, "mousemove", mouseMove)
off(display.scroller, "dragstart", dragStart)
off(display.scroller, "drop", dragEnd)
if (!moved) {
e_preventDefault(e)
if (!behavior.addNew)
{ extendSelection(cm.doc, pos, null, null, behavior.extend) }
// Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
if (webkit || ie && ie_version == 9)
{ setTimeout(function () {document.body.focus(); display.input.focus()}, 20) }
else
{ display.input.focus() }

    }

    }

    return type;



  })
var mouseMove = function(e2) {
moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10

  }

  }

 
  var dragStart = function () { return moved = true; }
// Let the drag handler handle this.
if (webkit) { display.scroller.draggable = true }
cm.state.draggingText = dragEnd
dragEnd.copy = !behavior.moveOnDrag
// IE's approach to draggable
if (display.scroller.dragDrop) { display.scroller.dragDrop() }
on(document, "mouseup", dragEnd)
on(document, "mousemove", mouseMove)
on(display.scroller, "dragstart", dragStart)
on(display.scroller, "drop", dragEnd)





  function callBlankLine(mode, state) {
if (mode.blankLine) return mode.blankLine(state);
if (!mode.innerMode) return;
var inner = CodeMirror.innerMode(mode, state);
if (inner.mode.blankLine) return inner.mode.blankLine(inner.state);























  delayBlurEvent(cm)
setTimeout(function () { return display.input.focus(); }, 20)
}

function rangeForUnit(cm, pos, unit) {
if (unit == "char") { return new Range(pos, pos) }
if (unit == "word") { return cm.findWordAt(pos) }
if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
var result = unit(cm, pos)
return new Range(result.from, result.to)
}

// Normal selection, as opposed to text dragging.
function leftButtonSelect(cm, event, start, behavior) {
var display = cm.display, doc = cm.doc
e_preventDefault(event)

var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges
if (behavior.addNew && !behavior.extend) {
ourIndex = doc.sel.contains(start)
if (ourIndex > -1)
{ ourRange = ranges[ourIndex] }
else
{ ourRange = new Range(start, start) }
} else {
ourRange = doc.sel.primary()
ourIndex = doc.sel.primIndex

  }


  }


  function readToken(mode, stream, state, inner) {
for (var i = 0; i < 10; i++) {
if (inner) inner[0] = CodeMirror.innerMode(mode, state).mode;
var style = mode.token(stream, state);
if (stream.pos > stream.start) return style;
}
throw new Error("Mode " + mode.name + " failed to advance stream.");




  if (behavior.unit == "rectangle") {
if (!behavior.addNew) { ourRange = new Range(start, start) }
start = posFromMouse(cm, event, true, true)
ourIndex = -1
} else {
var range = rangeForUnit(cm, start, behavior.unit)
if (behavior.extend)
{ ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend) }
else
{ ourRange = range }

  }


  }


  // Utility for getTokenAt and getLineTokens
function takeToken(cm, pos, precise, asArray) {
function getObj(copy) {
return {start: stream.start, end: stream.pos,
string: stream.current(),
type: style || null,
state: copy ? copyState(doc.mode, state) : state};
}

var doc = cm.doc, mode = doc.mode, style;
pos = clipPos(doc, pos);
var line = getLine(doc, pos.line), state = getStateBefore(cm, pos.line, precise);
var stream = new StringStream(line.text, cm.options.tabSize), tokens;
if (asArray) tokens = [];
while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
stream.start = stream.pos;
style = readToken(mode, stream, state);
if (asArray) tokens.push(getObj(true));
}
return asArray ? tokens : getObj();

  if (!behavior.addNew) {
ourIndex = 0
setSelection(doc, new Selection([ourRange], 0), sel_mouse)
startSel = doc.sel
} else if (ourIndex == -1) {
ourIndex = ranges.length
setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex),
{scroll: false, origin: "*mouse"})
} else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
{scroll: false, origin: "*mouse"})
startSel = doc.sel
} else {
replaceOneSelection(doc, ourIndex, ourRange, sel_mouse)







  }


  }


  // Run the given mode's parser over a line, calling f for each token.
function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) {
var flattenSpans = mode.flattenSpans;
if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
var curStart = 0, curStyle = null;
var stream = new StringStream(text, cm.options.tabSize), style;
var inner = cm.options.addModeClass && [null];
if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses);
while (!stream.eol()) {
if (stream.pos > cm.options.maxHighlightLength) {
flattenSpans = false;
if (forceToEnd) processLine(cm, text, state, stream.pos);
stream.pos = text.length;
style = null;
















  var lastPos = start
function extendTo(pos) {
if (cmp(lastPos, pos) == 0) { return }
lastPos = pos

if (behavior.unit == "rectangle") {
var ranges = [], tabSize = cm.options.tabSize
var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize)
var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize)
var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol)
for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
line <= end; line++) {
var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize)
if (left == right)
{ ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))) }
else if (text.length > leftPos)
{ ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))) }
}
if (!ranges.length) { ranges.push(new Range(start, start)) }
setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
{origin: "*mouse", scroll: false})
cm.scrollIntoView(pos)
} else {
var oldRange = ourRange
var range = rangeForUnit(cm, pos, behavior.unit)
var anchor = oldRange.anchor, head
if (cmp(range.anchor, anchor) > 0) {
head = range.head
anchor = minPos(oldRange.from(), range.anchor)

      } else {

      } else {

        style = extractLineClasses(readToken(mode, stream, state, inner), lineClasses);


        head = range.anchor
anchor = maxPos(oldRange.to(), range.head)

      }

      }

      if (inner) {
var mName = inner[0].name;
if (mName) style = "m-" + (style ? mName + " " + style : mName);
}
if (!flattenSpans || curStyle != style) {
while (curStart < stream.start) {
curStart = Math.min(stream.start, curStart + 50000);
f(curStart, curStyle);
}
curStyle = style;
}
stream.start = stream.pos;
}
while (curStart < stream.pos) {
// Webkit seems to refuse to render text nodes longer than 57444 characters
var pos = Math.min(stream.pos, curStart + 50000);
f(pos, curStyle);
curStart = pos;

      var ranges$1 = startSel.ranges.slice(0)
ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head))
setSelection(doc, normalizeSelection(ranges$1, ourIndex), sel_mouse)
















    }
}


    }
}


  // Compute a style array (an array starting with a mode generation
// -- for invalidation -- followed by pairs of end positions and
// style strings), which is used to highlight the tokens on the
// line.
function highlightLine(cm, line, state, forceToEnd) {
// A styles array always starts with a number identifying the
// mode/overlays that it is based on (for easy invalidation).
var st = [cm.state.modeGen], lineClasses = {};
// Compute the base array of styles
runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
st.push(end, style);
}, lineClasses, forceToEnd);

  var editorSize = display.wrapper.getBoundingClientRect()
// Used to ensure timeout re-tries don't fire when another extend
// happened in the meantime (clearTimeout isn't reliable -- at
// least on Chrome, the timeouts still happen even when cleared,
// if the clear happens after their scheduled firing time).
var counter = 0











    // Run overlays, adjust style array.
for (var o = 0; o < cm.state.overlays.length; ++o) {
var overlay = cm.state.overlays[o], i = 1, at = 0;
runMode(cm, line.text, overlay.mode, true, function(end, style) {
var start = i;
// Ensure there's a token end at the current position, and that i points at it
while (at < end) {
var i_end = st[i];
if (i_end > end)
st.splice(i, 1, end, st[i+1], i_end);
i += 2;
at = Math.min(end, i_end);
}
if (!style) return;
if (overlay.opaque) {
st.splice(start, i - start, end, "cm-overlay " + style);
i = start + 2;
} else {
for (; start < i; start += 2) {
var cur = st[start+1];
st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style;
}
}
}, lineClasses);

  function extend(e) {
var curCount = ++counter
var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle")
if (!cur) { return }
if (cmp(cur, lastPos) != 0) {
cm.curOp.focus = activeElt()
extendTo(cur)
var visible = visibleLines(display, doc)
if (cur.line >= visible.to || cur.line < visible.from)
{ setTimeout(operation(cm, function () {if (counter == curCount) { extend(e) }}), 150) }
} else {
var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0
if (outside) { setTimeout(operation(cm, function () {
if (counter != curCount) { return }
display.scroller.scrollTop += outside
extend(e)
}), 50) }








    }

    }

 
  }





    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null};








  function done(e) {
cm.state.selectingText = false
counter = Infinity
e_preventDefault(e)
display.input.focus()
off(document, "mousemove", move)
off(document, "mouseup", up)
doc.history.lastSelOrigin = null

  }


  }


  function getLineStyles(cm, line, updateFrontier) {
if (!line.styles || line.styles[0] != cm.state.modeGen) {
var result = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
line.styles = result.styles;
if (result.classes) line.styleClasses = result.classes;
else if (line.styleClasses) line.styleClasses = null;
if (updateFrontier === cm.doc.frontier) cm.doc.frontier++;
}
return line.styles;




























  var move = operation(cm, function (e) {
if (!e_button(e)) { done(e) }
else { extend(e) }
})
var up = operation(cm, done)
cm.state.selectingText = up
on(document, "mousemove", move)
on(document, "mouseup", up)
}

// Used when mouse-selecting to adjust the anchor to the proper side
// of a bidi jump depending on the visual position of the head.
function bidiSimplify(cm, range) {
var anchor = range.anchor;
var head = range.head;
var anchorLine = getLine(cm.doc, anchor.line)
if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range }
var order = getOrder(anchorLine)
if (!order) { return range }
var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index]
if (part.from != anchor.ch && part.to != anchor.ch) { return range }
var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1)
if (boundary == 0 || boundary == order.length) { return range }

// Compute the relative visual position of the head compared to the
// anchor (<0 is to the left, >0 to the right)
var leftSide
if (head.line != anchor.line) {
leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0
} else {
var headIndex = getBidiPartAt(order, head.ch, head.sticky)
var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1)
if (headIndex == boundary - 1 || headIndex == boundary)
{ leftSide = dir < 0 }
else
{ leftSide = dir > 0 }

  }


  }


  // Lightweight form of highlight -- proceed over this line and
// update state, but don't save a style array. Used for lines that
// aren't currently visible.
function processLine(cm, text, state, startAt) {
var mode = cm.doc.mode;
var stream = new StringStream(text, cm.options.tabSize);
stream.start = stream.pos = startAt || 0;
if (text == "") callBlankLine(mode, state);
while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
readToken(mode, stream, state);
stream.start = stream.pos;
























  var usePart = order[boundary + (leftSide ? -1 : 0)]
var from = leftSide == (usePart.level == 1)
var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before"
return anchor.ch == ch && anchor.sticky == sticky ? range : new Range(new Pos(anchor.line, ch, sticky), head)
}


// Determines whether an event happened in the gutter, and fires the
// handlers for the corresponding event.
function gutterEvent(cm, e, type, prevent) {
var mX, mY
if (e.touches) {
mX = e.touches[0].clientX
mY = e.touches[0].clientY
} else {
try { mX = e.clientX; mY = e.clientY }
catch(e) { return false }
}
if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
if (prevent) { e_preventDefault(e) }

var display = cm.display
var lineBox = display.lineDiv.getBoundingClientRect()

if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
mY -= lineBox.top - display.viewOffset

for (var i = 0; i < cm.options.gutters.length; ++i) {
var g = display.gutters.childNodes[i]
if (g && g.getBoundingClientRect().right >= mX) {
var line = lineAtHeight(cm.doc, mY)
var gutter = cm.options.gutters[i]
signal(cm, type, cm, line, gutter, e)
return e_defaultPrevented(e)

    }
}

    }
}

 
}





  // Convert a style as returned by a mode (either null, or a string
// containing one or more styles) to a CSS style. This is cached,
// and also looks for line-wide styles.
var styleToClassCache = {}, styleToClassCacheWithMode = {};
function interpretTokenStyle(style, options) {
if (!style || /^\s*$/.test(style)) return null;
var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
return cache[style] ||
(cache[style] = style.replace(/\S+/g, "cm-$&"));






























function clickInGutter(cm, e) {
return gutterEvent(cm, e, "gutterClick", true)
}

// CONTEXT MENU HANDLING

// To make the context menu work, we need to briefly unhide the
// textarea (making it as unobtrusive as possible) to let the
// right-click take effect on it.
function onContextMenu(cm, e) {
if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
if (signalDOMEvent(cm, e, "contextmenu")) { return }
cm.display.input.onContextMenu(e)
}

function contextMenuInGutter(cm, e) {
if (!hasHandler(cm, "gutterContextMenu")) { return false }
return gutterEvent(cm, e, "gutterContextMenu", false)
}

function themeChanged(cm) {
cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-")
clearCaches(cm)
}

var Init = {toString: function(){return "CodeMirror.Init"}}

var defaults = {}
var optionHandlers = {}

function defineOptions(CodeMirror) {
var optionHandlers = CodeMirror.optionHandlers

function option(name, deflt, handle, notOnInit) {
CodeMirror.defaults[name] = deflt
if (handle) { optionHandlers[name] =
notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old) }} : handle }

  }


  }


  // Render the DOM representation of the text of a line. Also builds
// up a 'line map', which points at the DOM nodes that represent
// specific stretches of text, and is used by the measuring code.
// The returned object contains the DOM node, this map, and
// information about line-wide styles that were set by the mode.
function buildLineContent(cm, lineView) {
// The padding-right forces the element to have a 'border', which
// is needed on Webkit to be able to get line-level bounding
// rectangles for it (in measureChar).
var content = elt("span", null, null, webkit ? "padding-right: .1px" : null);
var builder = {pre: elt("pre", [content]), content: content, col: 0, pos: 0, cm: cm};
lineView.measure = {};

  CodeMirror.defineOption = option
















    // Iterate over the logical lines that make up this visual line.
for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
var line = i ? lineView.rest[i - 1] : lineView.line, order;
builder.pos = 0;
builder.addToken = buildToken;
// Optionally wire in some hacks into the token-rendering
// algorithm, to deal with browser quirks.
if ((ie || webkit) && cm.getOption("lineWrapping"))
builder.addToken = buildTokenSplitSpaces(builder.addToken);
if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line)))
builder.addToken = buildTokenBadBidi(builder.addToken, order);
builder.map = [];
var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
if (line.styleClasses) {
if (line.styleClasses.bgClass)
builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || "");
if (line.styleClasses.textClass)
builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || "");
}

  // Passed to option handlers when there is no old value.
CodeMirror.Init = Init























      // Ensure at least a single node is present, for measuring.
if (builder.map.length == 0)
builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure)));





  // These two are, on init, called from the constructor because they
// have to be initialized before the editor can start at all.
option("value", "", function (cm, val) { return cm.setValue(val); }, true)
option("mode", null, function (cm, val) {
cm.doc.modeOption = val
loadMode(cm)
}, true)





      // Store the map and a cache object for the current logical line
if (i == 0) {
lineView.measure.map = builder.map;
lineView.measure.cache = {};
} else {
(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map);
(lineView.measure.caches || (lineView.measure.caches = [])).push({});












  option("indentUnit", 2, loadMode, true)
option("indentWithTabs", false)
option("smartIndent", true)
option("tabSize", 4, function (cm) {
resetModeState(cm)
clearCaches(cm)
regChange(cm)
}, true)
option("lineSeparator", null, function (cm, val) {
cm.doc.lineSep = val
if (!val) { return }
var newBreaks = [], lineNo = cm.doc.first
cm.doc.iter(function (line) {
for (var pos = 0;;) {
var found = line.text.indexOf(val, pos)
if (found == -1) { break }
pos = found + val.length
newBreaks.push(Pos(lineNo, found))

      }

      }

 
      lineNo++
})
for (var i = newBreaks.length - 1; i >= 0; i--)
{ replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)) }
})
option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff]/g, function (cm, val, old) {
cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g")
if (old != Init) { cm.refresh() }
})
option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true)
option("electricChars", true)
option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
}, true)
option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true)
option("rtlMoveVisually", !windows)
option("wholeLineUpdateBefore", true)

option("theme", "default", function (cm) {
themeChanged(cm)
guttersChanged(cm)
}, true)
option("keyMap", "default", function (cm, val, old) {
var next = getKeyMap(val)
var prev = old != Init && getKeyMap(old)
if (prev && prev.detach) { prev.detach(cm, next) }
if (next.attach) { next.attach(cm, prev || null) }
})
option("extraKeys", null)
option("configureMouse", null)

option("lineWrapping", false, wrappingChanged, true)
option("gutters", [], function (cm) {
setGuttersForLineNumbers(cm.options)
guttersChanged(cm)
}, true)
option("fixedGutter", true, function (cm, val) {
cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"
cm.refresh()
}, true)
option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true)
option("scrollbarStyle", "native", function (cm) {
initScrollbars(cm)
updateScrollbars(cm)
cm.display.scrollbars.setScrollTop(cm.doc.scrollTop)
cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft)
}, true)
option("lineNumbers", false, function (cm) {
setGuttersForLineNumbers(cm.options)
guttersChanged(cm)
}, true)
option("firstLineNumber", 1, guttersChanged, true)
option("lineNumberFormatter", function (integer) { return integer; }, guttersChanged, true)
option("showCursorWhenSelecting", false, updateSelection, true)

option("resetSelectionOnContextMenu", true)
option("lineWiseCopyCut", true)
option("pasteLinesPerSelection", true)

option("readOnly", false, function (cm, val) {
if (val == "nocursor") {
onBlur(cm)
cm.display.input.blur()

    }

    }

 
    cm.display.input.readOnlyChanged(val)
})
option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset() }}, true)
option("dragDrop", true, dragDropChanged)
option("allowDropFileTypes", null)

option("cursorBlinkRate", 530)
option("cursorScrollMargin", 0)
option("cursorHeight", 1, updateSelection, true)
option("singleCursorHeightPerLine", true, updateSelection, true)
option("workTime", 100)
option("workDelay", 100)
option("flattenSpans", true, resetModeState, true)
option("addModeClass", false, resetModeState, true)
option("pollInterval", 100)
option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; })
option("historyEventDelay", 1250)
option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true)
option("maxHighlightLength", 10000, resetModeState, true)
option("moveInputWithCursor", true, function (cm, val) {
if (!val) { cm.display.input.resetPosition() }
})





    // See issue #2901
if (webkit && /\bcm-tab\b/.test(builder.content.lastChild.className))
builder.content.className = "cm-tab-wrap-hack";


  option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; })
option("autofocus", null)
option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true)
}





    signal(cm, "renderLine", cm, lineView.line, builder.pre);
if (builder.pre.className)
builder.textClass = joinClasses(builder.pre.className, builder.textClass || "");



function guttersChanged(cm) {
updateGutters(cm)
regChange(cm)
alignHorizontally(cm)
}





    return builder;










function dragDropChanged(cm, value, old) {
var wasOn = old && old != Init
if (!value != !wasOn) {
var funcs = cm.display.dragFunctions
var toggle = value ? on : off
toggle(cm.display.scroller, "dragstart", funcs.start)
toggle(cm.display.scroller, "dragenter", funcs.enter)
toggle(cm.display.scroller, "dragover", funcs.over)
toggle(cm.display.scroller, "dragleave", funcs.leave)
toggle(cm.display.scroller, "drop", funcs.drop)

  }

  }

 
}





  function defaultSpecialCharPlaceholder(ch) {
var token = elt("span", "\u2022", "cm-invalidchar");
token.title = "\\u" + ch.charCodeAt(0).toString(16);
return token;





function wrappingChanged(cm) {
if (cm.options.lineWrapping) {
addClass(cm.display.wrapper, "CodeMirror-wrap")
cm.display.sizer.style.minWidth = ""
cm.display.sizerWidth = null
} else {
rmClass(cm.display.wrapper, "CodeMirror-wrap")
findMaxLine(cm)

  }

  }

 
  estimateLineHeights(cm)
regChange(cm)
clearCaches(cm)
setTimeout(function () { return updateScrollbars(cm); }, 100)
}





  // Build up the DOM representation for a single token, and add it to
// the line map. Takes care to render special characters separately.
function buildToken(builder, text, style, startStyle, endStyle, title, css) {
if (!text) return;
var special = builder.cm.options.specialChars, mustWrap = false;
if (!special.test(text)) {
builder.col += text.length;
var content = document.createTextNode(text);
builder.map.push(builder.pos, builder.pos + text.length, content);
if (ie && ie_version < 9) mustWrap = true;
builder.pos += text.length;
} else {
var content = document.createDocumentFragment(), pos = 0;
while (true) {
special.lastIndex = pos;
var m = special.exec(text);
var skipped = m ? m.index - pos : text.length - pos;
if (skipped) {
var txt = document.createTextNode(text.slice(pos, pos + skipped));
if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
else content.appendChild(txt);
builder.map.push(builder.pos, builder.pos + skipped, txt);
builder.col += skipped;
builder.pos += skipped;
}
if (!m) break;
pos += skipped + 1;
if (m[0] == "\t") {
var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
builder.col += tabWidth;
} else {
var txt = builder.cm.options.specialCharPlaceholder(m[0]);
if (ie && ie_version < 9) content.appendChild(elt("span", [txt]));
else content.appendChild(txt);
builder.col += 1;
}
builder.map.push(builder.pos, builder.pos + 1, txt);
builder.pos++;


























































































// A CodeMirror instance represents an editor. This is the object
// that user code is usually dealing with.

function CodeMirror(place, options) {
var this$1 = this;

if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }

this.options = options = options ? copyObj(options) : {}
// Determine effective options based on given values and defaults.
copyObj(defaults, options, false)
setGuttersForLineNumbers(options)

var doc = options.value
if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction) }
this.doc = doc

var input = new CodeMirror.inputStyles[options.inputStyle](this)
var display = this.display = new Display(place, doc, input)
display.wrapper.CodeMirror = this
updateGutters(this)
themeChanged(this)
if (options.lineWrapping)
{ this.display.wrapper.className += " CodeMirror-wrap" }
initScrollbars(this)

this.state = {
keyMaps: [], // stores maps added by addKeyMap
overlays: [], // highlighting overlays, as added by addOverlay
modeGen: 0, // bumped when mode/overlay changes, used to invalidate highlighting info
overwrite: false,
delayingBlurEvent: false,
focused: false,
suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll
selectingText: false,
draggingText: false,
highlight: new Delayed(), // stores highlight worker timeout
keySeq: null, // Unfinished key sequence
specialChars: null
}

if (options.autofocus && !mobile) { display.input.focus() }

// Override magic textarea content restore that IE sometimes does
// on our hidden textarea on reload
if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20) }

registerEventHandlers(this)
ensureGlobalHandlers()

startOperation(this)
this.curOp.forceUpdate = true
attachDoc(this, doc)

if ((options.autofocus && !mobile) || this.hasFocus())
{ setTimeout(bind(onFocus, this), 20) }
else
{ onBlur(this) }

for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
{ optionHandlers[opt](this$1, options[opt], Init) } }
maybeUpdateLineNumberWidth(this)
if (options.finishInit) { options.finishInit(this) }
for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1) }
endOperation(this)
// Suppress optimizelegibility in Webkit, since it breaks text
// measuring on line wrapping boundaries.
if (webkit && options.lineWrapping &&
getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
{ display.lineDiv.style.textRendering = "auto" }
}

// The default configuration options.
CodeMirror.defaults = defaults
// Functions to run when options are changed.
CodeMirror.optionHandlers = optionHandlers

// Attach the necessary event handlers when initializing the editor
function registerEventHandlers(cm) {
var d = cm.display
on(d.scroller, "mousedown", operation(cm, onMouseDown))
// Older IE's will not fire a second mousedown for a double click
if (ie && ie_version < 11)
{ on(d.scroller, "dblclick", operation(cm, function (e) {
if (signalDOMEvent(cm, e)) { return }
var pos = posFromMouse(cm, e)
if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
e_preventDefault(e)
var word = cm.findWordAt(pos)
extendSelection(cm.doc, word.anchor, word.head)
})) }
else
{ on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }) }
// Some browsers fire contextmenu *after* opening the menu, at
// which point we can't mess with it anymore. Context menu is
// handled in onMouseDown for these browsers.
if (!captureRightClick) { on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); }) }

// Used to suppress mouse event handling when a touch happens
var touchFinished, prevTouch = {end: 0}
function finishTouch() {
if (d.activeTouch) {
touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000)
prevTouch = d.activeTouch
prevTouch.end = +new Date
}
}
function isMouseLikeTouchEvent(e) {
if (e.touches.length != 1) { return false }
var touch = e.touches[0]
return touch.radiusX <= 1 && touch.radiusY <= 1
}
function farAway(touch, other) {
if (other.left == null) { return true }
var dx = other.left - touch.left, dy = other.top - touch.top
return dx * dx + dy * dy > 20 * 20
}
on(d.scroller, "touchstart", function (e) {
if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
d.input.ensurePolled()
clearTimeout(touchFinished)
var now = +new Date
d.activeTouch = {start: now, moved: false,
prev: now - prevTouch.end <= 300 ? prevTouch : null}
if (e.touches.length == 1) {
d.activeTouch.left = e.touches[0].pageX
d.activeTouch.top = e.touches[0].pageY

      }
}

      }
}

    if (style || startStyle || endStyle || mustWrap || css) {
var fullStyle = style || "";
if (startStyle) fullStyle += startStyle;
if (endStyle) fullStyle += endStyle;
var token = elt("span", [content], fullStyle, css);
if (title) token.title = title;
return builder.content.appendChild(token);












  })
on(d.scroller, "touchmove", function () {
if (d.activeTouch) { d.activeTouch.moved = true }
})
on(d.scroller, "touchend", function (e) {
var touch = d.activeTouch
if (touch && !eventInWidget(d, e) && touch.left != null &&
!touch.moved && new Date - touch.start < 300) {
var pos = cm.coordsChar(d.activeTouch, "page"), range
if (!touch.prev || farAway(touch, touch.prev)) // Single tap
{ range = new Range(pos, pos) }
else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
{ range = cm.findWordAt(pos) }
else // Triple tap
{ range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
cm.setSelection(range.anchor, range.head)
cm.focus()
e_preventDefault(e)

    }

    }

    builder.content.appendChild(content);
}


    finishTouch()
})
on(d.scroller, "touchcancel", finishTouch)





  function buildTokenSplitSpaces(inner) {
function split(old) {
var out = " ";
for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
out += " ";
return out;


  // Sync scrolling between fake scrollbars and real scrollable
// area, ensure viewport is updated when scrolling.
on(d.scroller, "scroll", function () {
if (d.scroller.clientHeight) {
updateScrollTop(cm, d.scroller.scrollTop)
setScrollLeft(cm, d.scroller.scrollLeft, true)
signal(cm, "scroll", cm)

    }

    }

    return function(builder, text, style, startStyle, endStyle, title) {
inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle, title);
};













  })

// Listen to wheel events in order to try and update the viewport on time.
on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); })
on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); })

// Prevent wrapper from ever scrolling
on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; })

d.dragFunctions = {
enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e) }},
over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e) }},
start: function (e) { return onDragStart(cm, e); },
drop: operation(cm, onDrop),
leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm) }}

  }


  }


  // Work around nonsense dimensions being reported for stretches of
// right-to-left text.
function buildTokenBadBidi(inner, order) {
return function(builder, text, style, startStyle, endStyle, title) {
style = style ? style + " cm-force-border" : "cm-force-border";
var start = builder.pos, end = start + text.length;
for (;;) {
// Find the part that overlaps with the start of this text
for (var i = 0; i < order.length; i++) {
var part = order[i];
if (part.to > start && part.from <= start) break;
}
if (part.to >= end) return inner(builder, text, style, startStyle, endStyle, title);
inner(builder, text.slice(0, part.to - start), style, startStyle, null, title);
startStyle = null;
text = text.slice(part.to - start);
start = part.to;
}
};






  var inp = d.input.getField()
on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); })
on(inp, "keydown", operation(cm, onKeyDown))
on(inp, "keypress", operation(cm, onKeyPress))
on(inp, "focus", function (e) { return onFocus(cm, e); })
on(inp, "blur", function (e) { return onBlur(cm, e); })
}

var initHooks = []
CodeMirror.defineInitHook = function (f) { return initHooks.push(f); }

// Indent the given line. The how parameter can be "smart",
// "add"/null, "subtract", or "prev". When aggressive is false
// (typically set to true for forced single-line indents), empty
// lines are not indented, and places where the mode returns Pass
// are left alone.
function indentLine(cm, n, how, aggressive) {
var doc = cm.doc, state
if (how == null) { how = "add" }
if (how == "smart") {
// Fall back to "prev" when the mode doesn't have an indentation
// method.
if (!doc.mode.indent) { how = "prev" }
else { state = getContextBefore(cm, n).state }

  }


  }


  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
var widget = !ignoreWidget && marker.widgetNode;
if (widget) {
builder.map.push(builder.pos, builder.pos + size, widget);
builder.content.appendChild(widget);








  var tabSize = cm.options.tabSize
var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
if (line.stateAfter) { line.stateAfter = null }
var curSpaceString = line.text.match(/^\s*/)[0], indentation
if (!aggressive && !/\S/.test(line.text)) {
indentation = 0
how = "not"
} else if (how == "smart") {
indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text)
if (indentation == Pass || indentation > 150) {
if (!aggressive) { return }
how = "prev"

    }

    }

    builder.pos += size;

 
  }

  }

 
  if (how == "prev") {
if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize) }
else { indentation = 0 }
} else if (how == "add") {
indentation = curSpace + cm.options.indentUnit
} else if (how == "subtract") {
indentation = curSpace - cm.options.indentUnit
} else if (typeof how == "number") {
indentation = curSpace + how
}
indentation = Math.max(0, indentation)





  // Outputs a number of spans to make up a line, taking highlighting
// and marked text into account.
function insertLineContent(line, builder, styles) {
var spans = line.markedSpans, allText = line.text, at = 0;
if (!spans) {
for (var i = 1; i < styles.length; i+=2)
builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder.cm.options));
return;
}

  var indentString = "", pos = 0
if (cm.options.indentWithTabs)
{ for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t"} }
if (pos < indentation) { indentString += spaceStr(indentation - pos) }










    var len = allText.length, pos = 0, i = 1, text = "", style, css;
var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
for (;;) {
if (nextChange == pos) { // Update current marker set
spanStyle = spanEndStyle = spanStartStyle = title = css = "";
collapsed = null; nextChange = Infinity;
var foundBookmarks = [];
for (var j = 0; j < spans.length; ++j) {
var sp = spans[j], m = sp.marker;
if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; }
if (m.className) spanStyle += " " + m.className;
if (m.css) css = m.css;
if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
if (m.title && !title) title = m.title;
if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
collapsed = sp;
} else if (sp.from > pos && nextChange > sp.from) {
nextChange = sp.from;
}
if (m.type == "bookmark" && sp.from == pos && m.widgetNode) foundBookmarks.push(m);
}
if (collapsed && (collapsed.from || 0) == pos) {
buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
collapsed.marker, collapsed.from == null);
if (collapsed.to == null) return;
}
if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookmarks.length; ++j)
buildCollapsedSpan(builder, 0, foundBookmarks[j]);
}
if (pos >= len) break;

var upto = Math.min(len, nextChange);
while (true) {
if (text) {
var end = pos + text.length;
if (!collapsed) {
var tokenText = end > upto ? text.slice(0, upto - pos) : text;
builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css);
}
if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
pos = end;
spanStartStyle = "";
}
text = allText.slice(at, at = styles[i++]);
style = interpretTokenStyle(styles[i++], builder.cm.options);

  if (indentString != curSpaceString) {
replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input")
line.stateAfter = null
return true
} else {
// Ensure that, if the cursor was in the whitespace at the start
// of the line, it is moved to the end of that space.
for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
var range = doc.sel.ranges[i$1]
if (range.head.line == n && range.head.ch < curSpaceString.length) {
var pos$1 = Pos(n, curSpaceString.length)
replaceOneSelection(doc, i$1, new Range(pos$1, pos$1))
break




































      }
}
}

      }
}
}

 
}





  // DOCUMENT DATA STRUCTURE




// This will be set to a {lineWise: bool, text: [string]} object, so
// that, when pasting, we know what kind of selections the copied
// text was made out of.
var lastCopied = null





  // By default, updates that start and end at the beginning of a line
// are treated specially, in order to make the association of line
// widgets and marker elements with the text behave more intuitive.
function isWholeLineUpdate(doc, change) {
return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
(!doc.cm || doc.cm.options.wholeLineUpdateBefore);
}

function setLastCopied(newLastCopied) {
lastCopied = newLastCopied
}









  // Perform a change on the document data structure.
function updateDoc(doc, change, markedSpans, estimateHeight) {
function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
function update(line, text, spans) {
updateLine(line, text, spans, estimateHeight);
signalLater(line, "change", line, change);
}
function linesFor(start, end) {
for (var i = start, result = []; i < end; ++i)
result.push(new Line(text[i], spansFor(i), estimateHeight));
return result;
}

function applyTextInput(cm, inserted, deleted, sel, origin) {
var doc = cm.doc
cm.display.shift = false
if (!sel) { sel = doc.sel }













    var from = change.from, to = change.to, text = change.text;
var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;

// Adjust the line structure
if (change.full) {
doc.insert(0, linesFor(0, text.length));
doc.remove(text.length, doc.size - text.length);
} else if (isWholeLineUpdate(doc, change)) {
// This is a whole-line replace. Treated specially to make
// sure line objects move the way they are supposed to.
var added = linesFor(0, text.length - 1);
update(lastLine, lastLine.text, lastSpans);
if (nlines) doc.remove(from.line, nlines);
if (added.length) doc.insert(from.line, added);
} else if (firstLine == lastLine) {
if (text.length == 1) {
update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
} else {
var added = linesFor(1, text.length - 1);
added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
doc.insert(from.line + 1, added);

  var paste = cm.state.pasteIncoming || origin == "paste"
var textLines = splitLinesAuto(inserted), multiPaste = null
// When pasing N lines into N selections, insert one line per selection
if (paste && sel.ranges.length > 1) {
if (lastCopied && lastCopied.text.join("\n") == inserted) {
if (sel.ranges.length % lastCopied.text.length == 0) {
multiPaste = []
for (var i = 0; i < lastCopied.text.length; i++)
{ multiPaste.push(doc.splitLines(lastCopied.text[i])) }















      }

      }

    } else if (text.length == 1) {
update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
doc.remove(from.line + 1, nlines);
} else {
update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
var added = linesFor(1, text.length - 1);
if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
doc.insert(from.line + 1, added);

    } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
multiPaste = map(textLines, function (l) { return [l]; })








    }

    }

 
  }





    signalLater(doc, "change", doc, change);


















  var updateInput
// Normal behavior is to insert the new text into every selection
for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
var range = sel.ranges[i$1]
var from = range.from(), to = range.to()
if (range.empty()) {
if (deleted && deleted > 0) // Handle deletion
{ from = Pos(from.line, from.ch - deleted) }
else if (cm.state.overwrite && !paste) // Handle overwrite
{ to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)) }
else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
{ from = to = Pos(from.line, 0) }
}
updateInput = cm.curOp.updateInput
var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")}
makeChange(cm.doc, changeEvent)
signalLater(cm, "inputRead", cm, changeEvent)

  }

  }

 
  if (inserted && !paste)
{ triggerElectric(cm, inserted) }





  // The document is represented as a BTree consisting of leaves, with
// chunk of lines in them, and branches, with up to ten leaves or
// other branch nodes below them. The top node is always a branch
// node, and is the document object itself (meaning it has
// additional methods and properties).
//
// All nodes have parent links. The tree is used both to go from
// line numbers to line objects, and to go from objects to numbers.
// It also indexes by height, and is used to convert between height
// and line object, and to find the total height of the document.
//
// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html

  ensureCursorVisible(cm)
cm.curOp.updateInput = updateInput
cm.curOp.typing = true
cm.state.pasteIncoming = cm.state.cutIncoming = false
}












  function LeafChunk(lines) {
this.lines = lines;
this.parent = null;
for (var i = 0, height = 0; i < lines.length; ++i) {
lines[i].parent = this;
height += lines[i].height;
























function handlePaste(e, cm) {
var pasted = e.clipboardData && e.clipboardData.getData("Text")
if (pasted) {
e.preventDefault()
if (!cm.isReadOnly() && !cm.options.disableInput)
{ runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }) }
return true
}
}

function triggerElectric(cm, inserted) {
// When an 'electric' character is inserted, immediately trigger a reindent
if (!cm.options.electricChars || !cm.options.smartIndent) { return }
var sel = cm.doc.sel

for (var i = sel.ranges.length - 1; i >= 0; i--) {
var range = sel.ranges[i]
if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
var mode = cm.getModeAt(range.head)
var indented = false
if (mode.electricChars) {
for (var j = 0; j < mode.electricChars.length; j++)
{ if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
indented = indentLine(cm, range.head.line, "smart")
break
} }
} else if (mode.electricInput) {
if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
{ indented = indentLine(cm, range.head.line, "smart") }

    }

    }

    this.height = height;

    if (indented) { signalLater(cm, "electricInput", cm, range.head.line) }

  }

  }

 
}





  LeafChunk.prototype = {
chunkSize: function() { return this.lines.length; },
// Remove the n lines at offset 'at'.
removeInner: function(at, n) {
for (var i = at, e = at + n; i < e; ++i) {
var line = this.lines[i];
this.height -= line.height;
cleanUpLine(line);
signalLater(line, "delete");
}
this.lines.splice(at, n);














































function copyableRanges(cm) {
var text = [], ranges = []
for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
var line = cm.doc.sel.ranges[i].head.line
var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}
ranges.push(lineRange)
text.push(cm.getRange(lineRange.anchor, lineRange.head))
}
return {text: text, ranges: ranges}
}

function disableBrowserMagic(field, spellcheck) {
field.setAttribute("autocorrect", "off")
field.setAttribute("autocapitalize", "off")
field.setAttribute("spellcheck", !!spellcheck)
}

function hiddenTextarea() {
var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none")
var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;")
// The textarea is kept positioned near the cursor to prevent the
// fact that it'll be scrolled into view on input from scrolling
// our fake cursor out of view. On webkit, when wrap=off, paste is
// very slow. So make the area wide instead.
if (webkit) { te.style.width = "1000px" }
else { te.setAttribute("wrap", "off") }
// If border: 0; -- iOS fails to open keyboard (issue #1287)
if (ios) { te.style.border = "1px solid black" }
disableBrowserMagic(te)
return div
}

// The publicly visible API. Note that methodOp(f) means
// 'wrap f in an operation, performed on its `this` parameter'.

// This is not the complete set of editor methods. Most of the
// methods defined on the Doc type are also injected into
// CodeMirror.prototype, for backwards compatibility and
// convenience.

function addEditorMethods(CodeMirror) {
var optionHandlers = CodeMirror.optionHandlers

var helpers = CodeMirror.helpers = {}

CodeMirror.prototype = {
constructor: CodeMirror,
focus: function(){window.focus(); this.display.input.focus()},

setOption: function(option, value) {
var options = this.options, old = options[option]
if (options[option] == value && option != "mode") { return }
options[option] = value
if (optionHandlers.hasOwnProperty(option))
{ operation(this, optionHandlers[option])(this, value, old) }
signal(this, "optionChange", this, option)

    },

    },

    // Helper used to collapse a small branch into a single leaf.
collapse: function(lines) {
lines.push.apply(lines, this.lines);





getOption: function(option) {return this.options[option]},
getDoc: function() {return this.doc},

addKeyMap: function(map, bottom) {
this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map))

    },

    },

    // Insert the given array of lines at offset 'at', count them as
// having the given height.
insertInner: function(at, lines, height) {
this.height += height;
this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
for (var i = 0; i < lines.length; ++i) lines[i].parent = this;


    removeKeyMap: function(map) {
var maps = this.state.keyMaps
for (var i = 0; i < maps.length; ++i)
{ if (maps[i] == map || maps[i].name == map) {
maps.splice(i, 1)
return true
} }

    },

    },

    // Used to iterate over a part of the tree.
iterN: function(at, n, op) {
for (var e = at + n; at < e; ++at)
if (op(this.lines[at])) return true;
}
};

 




  function BranchChunk(children) {
this.children = children;
var size = 0, height = 0;
for (var i = 0; i < children.length; ++i) {
var ch = children[i];
size += ch.chunkSize(); height += ch.height;
ch.parent = this;
}
this.size = size;
this.height = height;
this.parent = null;
}

    addOverlay: methodOp(function(spec, options) {
var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec)
if (mode.startState) { throw new Error("Overlays may not be stateful.") }
insertSorted(this.state.overlays,
{mode: mode, modeSpec: spec, opaque: options && options.opaque,
priority: (options && options.priority) || 0},
function (overlay) { return overlay.priority; })
this.state.modeGen++
regChange(this)
}),
removeOverlay: methodOp(function(spec) {
var this$1 = this;





  BranchChunk.prototype = {
chunkSize: function() { return this.size; },
removeInner: function(at, n) {
this.size -= n;
for (var i = 0; i < this.children.length; ++i) {
var child = this.children[i], sz = child.chunkSize();
if (at < sz) {
var rm = Math.min(n, sz - at), oldHeight = child.height;
child.removeInner(at, rm);
this.height -= oldHeight - child.height;
if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
if ((n -= rm) == 0) break;
at = 0;
} else at -= sz;

      var overlays = this.state.overlays
for (var i = 0; i < overlays.length; ++i) {
var cur = overlays[i].modeSpec
if (cur == spec || typeof spec == "string" && cur.name == spec) {
overlays.splice(i, 1)
this$1.state.modeGen++
regChange(this$1)
return
}






      }

      }

      // If the result is smaller than 25 lines, ensure that it is a
// single leaf node.
if (this.size - n < 25 &&
(this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
var lines = [];
this.collapse(lines);
this.children = [new LeafChunk(lines)];
this.children[0].parent = this;

    }),

indentLine: methodOp(function(n, dir, aggressive) {
if (typeof dir != "string" && typeof dir != "number") {
if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev" }
else { dir = dir ? "add" : "subtract" }



      }

      }

    },
collapse: function(lines) {
for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(lines);
},
insertInner: function(at, lines, height) {
this.size += lines.length;
this.height += height;
for (var i = 0; i < this.children.length; ++i) {
var child = this.children[i], sz = child.chunkSize();
if (at <= sz) {
child.insertInner(at, lines, height);
if (child.lines && child.lines.length > 50) {
while (child.lines.length > 50) {
var spilled = child.lines.splice(child.lines.length - 25, 25);
var newleaf = new LeafChunk(spilled);
child.height -= newleaf.height;
this.children.splice(i + 1, 0, newleaf);
newleaf.parent = this;
}
this.maybeSpill();
}
break;

      if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive) }
}),
indentSelection: methodOp(function(how) {
var this$1 = this;

var ranges = this.doc.sel.ranges, end = -1
for (var i = 0; i < ranges.length; i++) {
var range = ranges[i]
if (!range.empty()) {
var from = range.from(), to = range.to()
var start = Math.max(end, from.line)
end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1
for (var j = start; j < end; ++j)
{ indentLine(this$1, j, how) }
var newRanges = this$1.doc.sel.ranges
if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
{ replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll) }
} else if (range.head.line > end) {
indentLine(this$1, range.head.line, how, true)
end = range.head.line
if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1) }


        }

        }

        at -= sz;

 
      }

      }

 
    }),

// Fetch the parser token for a given character. Useful for hacks
// that want to inspect the mode state (say, for completion).
getTokenAt: function(pos, precise) {
return takeToken(this, pos, precise)

    },

    },

    // When a node has grown, check whether it should be split.
maybeSpill: function() {
if (this.children.length <= 10) return;
var me = this;
do {
var spilled = me.children.splice(me.children.length - 5, 5);
var sibling = new BranchChunk(spilled);
if (!me.parent) { // Become the parent node
var copy = new BranchChunk(me.children);
copy.parent = me;
me.children = [copy, sibling];
me = copy;
} else {
me.size -= sibling.size;
me.height -= sibling.height;
var myIndex = indexOf(me.parent.children, me);
me.parent.children.splice(myIndex + 1, 0, sibling);
}
sibling.parent = me.parent;
} while (me.children.length > 10);
me.parent.maybeSpill();


getLineTokens: function(line, precise) {
return takeToken(this, Pos(line), precise, true)



















    },

    },

    iterN: function(at, n, op) {
for (var i = 0; i < this.children.length; ++i) {
var child = this.children[i], sz = child.chunkSize();
if (at < sz) {
var used = Math.min(n, sz - at);
if (child.iterN(at, used, op)) return true;
if ((n -= used) == 0) break;
at = 0;
} else at -= sz;
}
}
};

 




  var nextDocId = 0;
var Doc = CodeMirror.Doc = function(text, mode, firstLine) {
if (!(this instanceof Doc)) return new Doc(text, mode, firstLine);
if (firstLine == null) firstLine = 0;












    getTokenTypeAt: function(pos) {
pos = clipPos(this.doc, pos)
var styles = getLineStyles(this, getLine(this.doc, pos.line))
var before = 0, after = (styles.length - 1) / 2, ch = pos.ch
var type
if (ch == 0) { type = styles[2] }
else { for (;;) {
var mid = (before + after) >> 1
if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid }
else if (styles[mid * 2 + 1] < ch) { before = mid + 1 }
else { type = styles[mid * 2 + 2]; break }
} }
var cut = type ? type.indexOf("overlay ") : -1
return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
},





    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
this.first = firstLine;
this.scrollTop = this.scrollLeft = 0;
this.cantEdit = false;
this.cleanGeneration = 1;
this.frontier = firstLine;
var start = Pos(firstLine, 0);
this.sel = simpleSelection(start);
this.history = new History(null);
this.id = ++nextDocId;
this.modeOption = mode;

    getModeAt: function(pos) {
var mode = this.doc.mode
if (!mode.innerMode) { return mode }
return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
},











    if (typeof text == "string") text = splitLines(text);
updateDoc(this, {from: start, to: start, text: text});
setSelection(this, simpleSelection(start), sel_dontScroll);
};

    getHelper: function(pos, type) {
return this.getHelpers(pos, type)[0]
},






  Doc.prototype = createObj(BranchChunk.prototype, {
constructor: Doc,
// Iterate over the document. Supports two forms -- with only one
// argument, it calls that for each line in the document. With
// three, it iterates over the range given by the first two (with
// the second being non-inclusive).
iter: function(from, to, op) {
if (op) this.iterN(from - this.first, to - from, op);
else this.iterN(this.first, this.first + this.size, from);
















    getHelpers: function(pos, type) {
var this$1 = this;

var found = []
if (!helpers.hasOwnProperty(type)) { return found }
var help = helpers[type], mode = this.getModeAt(pos)
if (typeof mode[type] == "string") {
if (help[mode[type]]) { found.push(help[mode[type]]) }
} else if (mode[type]) {
for (var i = 0; i < mode[type].length; i++) {
var val = help[mode[type][i]]
if (val) { found.push(val) }
}
} else if (mode.helperType && help[mode.helperType]) {
found.push(help[mode.helperType])
} else if (help[mode.name]) {
found.push(help[mode.name])
}
for (var i$1 = 0; i$1 < help._global.length; i$1++) {
var cur = help._global[i$1]
if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
{ found.push(cur.val) }
}
return found

    },


    },


    // Non-public interface for adding and removing lines.
insert: function(at, lines) {
var height = 0;
for (var i = 0; i < lines.length; ++i) height += lines[i].height;
this.insertInner(at - this.first, lines, height);

    getStateAfter: function(line, precise) {
var doc = this.doc
line = clipLine(doc, line == null ? doc.first + doc.size - 1: line)
return getContextBefore(this, line + 1, precise).state


    },

    },

    remove: function(at, n) { this.removeInner(at - this.first, n); },

 




    // From here, the methods are part of the public interface. Most
// are also available from CodeMirror (editor) instances.






    cursorCoords: function(start, mode) {
var pos, range = this.doc.sel.primary()
if (start == null) { pos = range.head }
else if (typeof start == "object") { pos = clipPos(this.doc, start) }
else { pos = start ? range.from() : range.to() }
return cursorCoords(this, pos, mode || "page")
},





    getValue: function(lineSep) {
var lines = getLines(this, this.first, this.first + this.size);
if (lineSep === false) return lines;
return lines.join(lineSep || "\n");

    charCoords: function(pos, mode) {
return charCoords(this, clipPos(this.doc, pos), mode || "page")



    },

    },

    setValue: docMethodOp(function(code) {
var top = Pos(this.first, 0), last = this.first + this.size - 1;
makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
text: splitLines(code), origin: "setValue", full: true}, true);
setSelection(this, simpleSelection(top));
}),
replaceRange: function(code, from, to, origin) {
from = clipPos(this, from);
to = to ? clipPos(this, to) : from;
replaceRange(this, code, from, to, origin);


coordsChar: function(coords, mode) {
coords = fromCoordSystem(this, coords, mode || "page")
return coordsChar(this, coords.left, coords.top)







    },

    },

    getRange: function(from, to, lineSep) {
var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
if (lineSep === false) return lines;
return lines.join(lineSep || "\n");















lineAtHeight: function(height, mode) {
height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top
return lineAtHeight(this.doc, height + this.display.viewOffset)
},
heightAtLine: function(line, mode, includeWidgets) {
var end = false, lineObj
if (typeof line == "number") {
var last = this.doc.first + this.doc.size - 1
if (line < this.doc.first) { line = this.doc.first }
else if (line > last) { line = last; end = true }
lineObj = getLine(this.doc, line)
} else {
lineObj = line
}
return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
(end ? this.doc.height - heightAtLine(lineObj) : 0)

    },


    },


    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},


    defaultTextHeight: function() { return textHeight(this.display) },
defaultCharWidth: function() { return charWidth(this.display) },





    getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
getLineNumber: function(line) {return lineNo(line);},

    getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},






    getLineHandleVisualStart: function(line) {
if (typeof line == "number") line = getLine(this, line);
return visualLine(line);































    addWidget: function(pos, node, scroll, vert, horiz) {
var display = this.display
pos = cursorCoords(this, clipPos(this.doc, pos))
var top = pos.bottom, left = pos.left
node.style.position = "absolute"
node.setAttribute("cm-ignore-events", "true")
this.display.input.setUneditable(node)
display.sizer.appendChild(node)
if (vert == "over") {
top = pos.top
} else if (vert == "above" || vert == "near") {
var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth)
// Default to positioning above (if specified and possible); otherwise default to positioning below
if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
{ top = pos.top - node.offsetHeight }
else if (pos.bottom + node.offsetHeight <= vspace)
{ top = pos.bottom }
if (left + node.offsetWidth > hspace)
{ left = hspace - node.offsetWidth }
}
node.style.top = top + "px"
node.style.left = node.style.right = ""
if (horiz == "right") {
left = display.sizer.clientWidth - node.offsetWidth
node.style.right = "0px"
} else {
if (horiz == "left") { left = 0 }
else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2 }
node.style.left = left + "px"
}
if (scroll)
{ scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}) }

    },


    },


    lineCount: function() {return this.size;},
firstLine: function() {return this.first;},
lastLine: function() {return this.first + this.size - 1;},


    triggerOnKeyDown: methodOp(onKeyDown),
triggerOnKeyPress: methodOp(onKeyPress),
triggerOnKeyUp: onKeyUp,
triggerOnMouseDown: methodOp(onMouseDown),





    clipPos: function(pos) {return clipPos(this, pos);},

getCursor: function(start) {
var range = this.sel.primary(), pos;
if (start == null || start == "head") pos = range.head;
else if (start == "anchor") pos = range.anchor;
else if (start == "end" || start == "to" || start === false) pos = range.to();
else pos = range.from();
return pos;

    execCommand: function(cmd) {
if (commands.hasOwnProperty(cmd))
{ return commands[cmd].call(null, this) }







    },

    },

    listSelections: function() { return this.sel.ranges; },
somethingSelected: function() {return this.sel.somethingSelected();},

 




    setCursor: docMethodOp(function(line, ch, options) {
setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
}),
setSelection: docMethodOp(function(anchor, head, options) {
setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
}),
extendSelection: docMethodOp(function(head, other, options) {
extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
}),
extendSelections: docMethodOp(function(heads, options) {
extendSelections(this, clipPosArray(this, heads, options));
}),
extendSelectionsBy: docMethodOp(function(f, options) {
extendSelections(this, map(this.sel.ranges, f), options);
}),
setSelections: docMethodOp(function(ranges, primary, options) {
if (!ranges.length) return;
for (var i = 0, out = []; i < ranges.length; i++)
out[i] = new Range(clipPos(this, ranges[i].anchor),
clipPos(this, ranges[i].head));
if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIndex);
setSelection(this, normalizeSelection(out, primary), options);
}),
addSelection: docMethodOp(function(anchor, head, options) {
var ranges = this.sel.ranges.slice(0);
ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
setSelection(this, normalizeSelection(ranges, ranges.length - 1), options);
}),

    triggerElectric: methodOp(function(text) { triggerElectric(this, text) }),
































    getSelection: function(lineSep) {
var ranges = this.sel.ranges, lines;
for (var i = 0; i < ranges.length; i++) {
var sel = getBetween(this, ranges[i].from(), ranges[i].to());
lines = lines ? lines.concat(sel) : sel;





    findPosH: function(from, amount, unit, visually) {
var this$1 = this;

var dir = 1
if (amount < 0) { dir = -1; amount = -amount }
var cur = clipPos(this.doc, from)
for (var i = 0; i < amount; ++i) {
cur = findPosH(this$1.doc, cur, dir, unit, visually)
if (cur.hitSide) { break }

      }

      }

      if (lineSep === false) return lines;
else return lines.join(lineSep || "\n");

      return cur


    },

    },

    getSelections: function(lineSep) {
var parts = [], ranges = this.sel.ranges;
for (var i = 0; i < ranges.length; i++) {
var sel = getBetween(this, ranges[i].from(), ranges[i].to());
if (lineSep !== false) sel = sel.join(lineSep || "\n");
parts[i] = sel;
}
return parts;
},
replaceSelection: function(code, collapse, origin) {
var dup = [];
for (var i = 0; i < this.sel.ranges.length; i++)
dup[i] = code;
this.replaceSelections(dup, collapse, origin || "+input");
},
replaceSelections: docMethodOp(function(code, collapse, origin) {
var changes = [], sel = this.sel;
for (var i = 0; i < sel.ranges.length; i++) {
var range = sel.ranges[i];
changes[i] = {from: range.from(), to: range.to(), text: splitLines(code[i]), origin: origin};
}
var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
for (var i = changes.length - 1; i >= 0; i--)
makeChange(this, changes[i]);
if (newSel) setSelectionReplaceHistory(this, newSel);
else if (this.cm) ensureCursorVisible(this.cm);


moveH: methodOp(function(dir, unit) {
var this$1 = this;

this.extendSelectionsBy(function (range) {
if (this$1.display.shift || this$1.doc.extend || range.empty())
{ return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
else
{ return dir < 0 ? range.from() : range.to() }
}, sel_move)

















    }),

    }),

    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),

 




    setExtending: function(val) {this.extend = val;},
getExtending: function() {return this.extend;},









    deleteH: methodOp(function(dir, unit) {
var sel = this.doc.sel, doc = this.doc
if (sel.somethingSelected())
{ doc.replaceSelection("", null, "+delete") }
else
{ deleteNearSelection(this, function (range) {
var other = findPosH(doc, range.head, dir, unit, false)
return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
}) }
}),





    historySize: function() {
var hist = this.history, done = 0, undone = 0;
for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++done;
for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) ++undone;
return {undo: done, redo: undone};
},
clearHistory: function() {this.history = new History(this.history.maxGeneration);},

    findPosV: function(from, amount, unit, goalColumn) {
var this$1 = this;










    markClean: function() {
this.cleanGeneration = this.changeGeneration(true);
},
changeGeneration: function(forceSplit) {
if (forceSplit)
this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null;
return this.history.generation;
},
isClean: function (gen) {
return this.history.generation == (gen || this.cleanGeneration);


      var dir = 1, x = goalColumn
if (amount < 0) { dir = -1; amount = -amount }
var cur = clipPos(this.doc, from)
for (var i = 0; i < amount; ++i) {
var coords = cursorCoords(this$1, cur, "div")
if (x == null) { x = coords.left }
else { coords.left = x }
cur = findPosV(this$1, coords, dir, unit)
if (cur.hitSide) { break }
}
return cur

    },


    },


    getHistory: function() {
return {done: copyHistoryArray(this.history.done),
undone: copyHistoryArray(this.history.undone)};
},
setHistory: function(histData) {
var hist = this.history = new History(this.history.maxGeneration);
hist.done = copyHistoryArray(histData.done.slice(0), null, true);
hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
},

    moveV: methodOp(function(dir, unit) {
var this$1 = this;












    addLineClass: docMethodOp(function(handle, where, cls) {
return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
var prop = where == "text" ? "textClass"
: where == "background" ? "bgClass"
: where == "gutter" ? "gutterClass" : "wrapClass";
if (!line[prop]) line[prop] = cls;
else if (classTest(cls).test(line[prop])) return false;
else line[prop] += " " + cls;
return true;
});
}),
removeLineClass: docMethodOp(function(handle, where, cls) {
return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) {
var prop = where == "text" ? "textClass"
: where == "background" ? "bgClass"
: where == "gutter" ? "gutterClass" : "wrapClass";
var cur = line[prop];
if (!cur) return false;
else if (cls == null) line[prop] = null;
else {
var found = cur.match(classTest(cls));
if (!found) return false;
var end = found.index + found[0].length;
line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
}
return true;
});

      var doc = this.doc, goals = []
var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected()
doc.extendSelectionsBy(function (range) {
if (collapse)
{ return dir < 0 ? range.from() : range.to() }
var headPos = cursorCoords(this$1, range.head, "div")
if (range.goalColumn != null) { headPos.left = range.goalColumn }
goals.push(headPos.left)
var pos = findPosV(this$1, headPos, dir, unit)
if (unit == "page" && range == doc.sel.primary())
{ addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top) }
return pos
}, sel_move)
if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
{ doc.sel.ranges[i].goalColumn = goals[i] } }













    }),


    }),


    markText: function(from, to, options) {
return markText(this, clipPos(this, from), clipPos(this, to), options, "range");
},
setBookmark: function(pos, options) {
var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
insertLeft: options && options.insertLeft,
clearWhenEmpty: false, shared: options && options.shared};
pos = clipPos(this, pos);
return markText(this, pos, pos, realOpts, "bookmark");
},
findMarksAt: function(pos) {
pos = clipPos(this, pos);
var markers = [], spans = getLine(this, pos.line).markedSpans;
if (spans) for (var i = 0; i < spans.length; ++i) {
var span = spans[i];
if ((span.from == null || span.from <= pos.ch) &&
(span.to == null || span.to >= pos.ch))
markers.push(span.marker.parent || span.marker);

    // Find the word at the given position (as returned by coordsChar).
findWordAt: function(pos) {
var doc = this.doc, line = getLine(doc, pos.line).text
var start = pos.ch, end = pos.ch
if (line) {
var helper = this.getHelper(pos, "wordChars")
if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end }
var startChar = line.charAt(start)
var check = isWordChar(startChar, helper)
? function (ch) { return isWordChar(ch, helper); }
: /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
: function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); }
while (start > 0 && check(line.charAt(start - 1))) { --start }
while (end < line.length && check(line.charAt(end))) { ++end }





      }

      }

      return markers;

      return new Range(Pos(pos.line, start), Pos(pos.line, end))

    },

    },

    findMarks: function(from, to, filter) {
from = clipPos(this, from); to = clipPos(this, to);
var found = [], lineNo = from.line;
this.iter(from.line, to.line + 1, function(line) {
var spans = line.markedSpans;
if (spans) for (var i = 0; i < spans.length; i++) {
var span = spans[i];
if (!(lineNo == from.line && from.ch > span.to ||
span.from == null && lineNo != from.line||
lineNo == to.line && span.from > to.ch) &&
(!filter || filter(span.marker)))
found.push(span.marker.parent || span.marker);
}
++lineNo;
});
return found;
},
getAllMarks: function() {
var markers = [];
this.iter(function(line) {
var sps = line.markedSpans;
if (sps) for (var i = 0; i < sps.length; ++i)
if (sps[i].from != null) markers.push(sps[i].marker);
});
return markers;


toggleOverwrite: function(value) {
if (value != null && value == this.state.overwrite) { return }
if (this.state.overwrite = !this.state.overwrite)
{ addClass(this.display.cursorDiv, "CodeMirror-overwrite") }
else
{ rmClass(this.display.cursorDiv, "CodeMirror-overwrite") }

signal(this, "overwriteToggle", this, this.state.overwrite)

















    },

    },

 
    hasFocus: function() { return this.display.input.getField() == activeElt() },
isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },





    posFromIndex: function(off) {
var ch, lineNo = this.first;
this.iter(function(line) {
var sz = line.text.length + 1;
if (sz > off) { ch = off; return true; }
off -= sz;
++lineNo;
});
return clipPos(this, Pos(lineNo, ch));
},
indexFromPos: function (coords) {
coords = clipPos(this, coords);
var index = coords.ch;
if (coords.line < this.first || coords.ch < 0) return 0;
this.iter(this.first, coords.line, function (line) {
index += line.text.length + 1;
});
return index;

    scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y) }),
getScrollInfo: function() {
var scroller = this.display.scroller
return {left: scroller.scrollLeft, top: scroller.scrollTop,
height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
clientHeight: displayHeight(this), clientWidth: displayWidth(this)}












    },


    },


    copy: function(copyHistory) {
var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first);
doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
doc.sel = this.sel;
doc.extend = false;
if (copyHistory) {
doc.history.undoDepth = this.history.undoDepth;
doc.setHistory(this.getHistory());

    scrollIntoView: methodOp(function(range, margin) {
if (range == null) {
range = {from: this.doc.sel.primary().head, to: null}
if (margin == null) { margin = this.options.cursorScrollMargin }
} else if (typeof range == "number") {
range = {from: Pos(range, 0), to: null}
} else if (range.from == null) {
range = {from: range, to: null}

      }

      }

      return doc;
},

      if (!range.to) { range.to = range.from }
range.margin = margin || 0





    linkedDoc: function(options) {
if (!options) options = {};
var from = this.first, to = this.first + this.size;
if (options.from != null && options.from > from) from = options.from;
if (options.to != null && options.to < to) to = options.to;
var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from);
if (options.sharedHist) copy.history = this.history;
(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
copySharedMarkers(copy, findSharedMarkers(this));
return copy;
},
unlinkDoc: function(other) {
if (other instanceof CodeMirror) other = other.doc;
if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
var link = this.linked[i];
if (link.doc != other) continue;
this.linked.splice(i, 1);
other.unlinkDoc(this);
detachSharedMarkers(findSharedMarkers(this));
break;

      if (range.from.line != null) {
scrollToRange(this, range)
} else {
scrollToCoordsRange(this, range.from, range.to, range.margin)


















      }

      }

      // If the histories were shared, split them again
if (other.history == this.history) {
var splitIds = [other.id];
linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
other.history = new History(null);
other.history.done = copyHistoryArray(this.history.done, splitIds);
other.history.undone = copyHistoryArray(this.history.undone, splitIds);
}
},
iterLinkedDocs: function(f) {linkedDocs(this, f);},

    }),














    getMode: function() {return this.mode;},
getEditor: function() {return this.cm;}
});

    setSize: methodOp(function(width, height) {
var this$1 = this;






  // Public alias.
Doc.prototype.eachLine = Doc.prototype.iter;












      var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; }
if (width != null) { this.display.wrapper.style.width = interpret(width) }
if (height != null) { this.display.wrapper.style.height = interpret(height) }
if (this.options.lineWrapping) { clearLineMeasurementCache(this) }
var lineNo = this.display.viewFrom
this.doc.iter(lineNo, this.display.viewTo, function (line) {
if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
{ if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
++lineNo
})
this.curOp.forceUpdate = true
signal(this, "refresh", this)
}),





  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
var dontDelegate = "iter insert remove copy getEditor".split(" ");
for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
CodeMirror.prototype[prop] = (function(method) {
return function() {return method.apply(this.doc, arguments);};
})(Doc.prototype[prop]);

    operation: function(f){return runInOp(this, f)},
startOperation: function(){return startOperation(this)},
endOperation: function(){return endOperation(this)},








  eventMixin(Doc);











    refresh: methodOp(function() {
var oldHeight = this.display.cachedTextHeight
regChange(this)
this.curOp.forceUpdate = true
clearCaches(this)
scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop)
updateGutterSpace(this)
if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
{ estimateLineHeights(this) }
signal(this, "refresh", this)
}),





  // Call f for all linked documents.
function linkedDocs(doc, f, sharedHistOnly) {
function propagate(doc, skip, sharedHist) {
if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
var rel = doc.linked[i];
if (rel.doc == skip) continue;
var shared = sharedHist && rel.sharedHist;
if (sharedHistOnly && !shared) continue;
f(rel.doc, shared);
propagate(rel.doc, doc, shared);
}
}
propagate(doc, null, true);




    swapDoc: methodOp(function(doc) {
var old = this.doc
old.cm = null
attachDoc(this, doc)
clearCaches(this)
this.display.input.reset()
scrollToCoords(this, doc.scrollLeft, doc.scrollTop)
this.curOp.forceScroll = true
signalLater(this, "swapDoc", this, old)
return old
}),

getInputField: function(){return this.display.input.getField()},
getWrapperElement: function(){return this.display.wrapper},
getScrollerElement: function(){return this.display.scroller},
getGutterElement: function(){return this.display.gutters}

  }

  }

 
  eventMixin(CodeMirror)





  // Attach a document to an editor.
function attachDoc(cm, doc) {
if (doc.cm) throw new Error("This document is already in use.");
cm.doc = doc;
doc.cm = cm;
estimateLineHeights(cm);
loadMode(cm);
if (!cm.options.lineWrapping) findMaxLine(cm);
cm.options.mode = doc.modeOption;
regChange(cm);

  CodeMirror.registerHelper = function(type, name, value) {
if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []} }
helpers[type][name] = value
}
CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
CodeMirror.registerHelper(type, name, value)
helpers[type]._global.push({pred: predicate, val: value})




  }

  }

 
}





  // LINE UTILITIES




































// Used for horizontal relative motion. Dir is -1 or 1 (left or
// right), unit can be "char", "column" (like char, but doesn't
// cross line boundaries), "word" (across next word), or "group" (to
// the start of next group of word or non-word-non-whitespace
// chars). The visually param controls whether, in right-to-left
// text, direction 1 means to move towards the next index in the
// string, or towards the character to the right of the current
// position. The resulting position will have a hitSide=true
// property if it reached the end of the document.
function findPosH(doc, pos, dir, unit, visually) {
var oldPos = pos
var origDir = dir
var lineObj = getLine(doc, pos.line)
function findNextLine() {
var l = pos.line + dir
if (l < doc.first || l >= doc.first + doc.size) { return false }
pos = new Pos(l, pos.ch, pos.sticky)
return lineObj = getLine(doc, l)
}
function moveOnce(boundToLine) {
var next
if (visually) {
next = moveVisually(doc.cm, lineObj, pos, dir)
} else {
next = moveLogically(lineObj, pos, dir)
}
if (next == null) {
if (!boundToLine && findNextLine())
{ pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir) }
else
{ return false }
} else {
pos = next
}
return true
}





  // Find the line object corresponding to the given line number.
function getLine(doc, n) {
n -= doc.first;
if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.first) + " in the document.");
for (var chunk = doc; !chunk.lines;) {
for (var i = 0;; ++i) {
var child = chunk.children[i], sz = child.chunkSize();
if (n < sz) { chunk = child; break; }
n -= sz;










  if (unit == "char") {
moveOnce()
} else if (unit == "column") {
moveOnce(true)
} else if (unit == "word" || unit == "group") {
var sawType = null, group = unit == "group"
var helper = doc.cm && doc.cm.getHelper(pos, "wordChars")
for (var first = true;; first = false) {
if (dir < 0 && !moveOnce(!first)) { break }
var cur = lineObj.text.charAt(pos.ch) || "\n"
var type = isWordChar(cur, helper) ? "w"
: group && cur == "\n" ? "n"
: !group || /\s/.test(cur) ? null
: "p"
if (group && !first && !type) { type = "s" }
if (sawType && sawType != type) {
if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after"}
break

      }

      }

 

if (type) { sawType = type }
if (dir > 0 && !moveOnce(!first)) { break }

    }

    }

    return chunk.lines[n];

 
  }

  }

 
  var result = skipAtomic(doc, pos, oldPos, origDir, true)
if (equalCursorPos(oldPos, result)) { result.hitSide = true }
return result
}





  // Get the part of a document between two positions, as an array of
// strings.
function getBetween(doc, start, end) {
var out = [], n = start.line;
doc.iter(start.line, end.line + 1, function(line) {
var text = line.text;
if (n == end.line) text = text.slice(0, end.ch);
if (n == start.line) text = text.slice(start.ch);
out.push(text);
++n;
});
return out;

// For relative vertical movement. Dir may be -1 or 1. Unit can be
// "page" or "line". The resulting position will have a hitSide=true
// property if it reached the end of the document.
function findPosV(cm, pos, dir, unit) {
var doc = cm.doc, x = pos.left, y
if (unit == "page") {
var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight)
var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3)
y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount

} else if (unit == "line") {
y = dir > 0 ? pos.bottom + 3 : pos.top - 3

  }

  }

  // Get the lines between from and to, as array of strings.
function getLines(doc, from, to) {
var out = [];
doc.iter(from, to, function(line) { out.push(line.text); });
return out;


  var target
for (;;) {
target = coordsChar(cm, x, y)
if (!target.outside) { break }
if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
y += dir * 5

  }

  }

 
  return target
}





  // Update the height of a line, propagating the height change
// upwards to parent nodes.
function updateLineHeight(line, height) {
var diff = height - line.height;
if (diff) for (var n = line; n; n = n.parent) n.height += diff;
}

// CONTENTEDITABLE INPUT STYLE










  // Given a line object, find its line number by walking up through
// its parent links.
function lineNo(line) {
if (line.parent == null) return null;
var cur = line.parent, no = indexOf(cur.lines, line);
for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
for (var i = 0;; ++i) {
if (chunk.children[i] == cur) break;
no += chunk.children[i].chunkSize();
}
}
return no + cur.first;
}

var ContentEditableInput = function(cm) {
this.cm = cm
this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null
this.polling = new Delayed()
this.composing = null
this.gracePeriod = false
this.readDOMTimeout = null
};










  // Find the line at the given vertical position, using the height
// information in the document tree.
function lineAtHeight(chunk, h) {
var n = chunk.first;
outer: do {
for (var i = 0; i < chunk.children.length; ++i) {
var child = chunk.children[i], ch = child.height;
if (h < ch) { chunk = child; continue outer; }
h -= ch;
n += child.chunkSize();
}
return n;
} while (!chunk.lines);
for (var i = 0; i < chunk.lines.length; ++i) {
var line = chunk.lines[i], lh = line.height;
if (h < lh) break;
h -= lh;







ContentEditableInput.prototype.init = function (display) {
var this$1 = this;

var input = this, cm = input.cm
var div = input.div = display.lineDiv
disableBrowserMagic(div, cm.options.spellcheck)

on(div, "paste", function (e) {
if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
// IE doesn't fire input events, so we schedule a read for the pasted content in this way
if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20) }
})

on(div, "compositionstart", function (e) {
this$1.composing = {data: e.data, done: false}
})
on(div, "compositionupdate", function (e) {
if (!this$1.composing) { this$1.composing = {data: e.data, done: false} }
})
on(div, "compositionend", function (e) {
if (this$1.composing) {
if (e.data != this$1.composing.data) { this$1.readFromDOMSoon() }
this$1.composing.done = true

    }

    }

    return n + i;
}

  })






 
  on(div, "touchstart", function () { return input.forceCompositionEnd(); })





  // Find the height above the given line.
function heightAtLine(lineObj) {
lineObj = visualLine(lineObj);

  on(div, "input", function () {
if (!this$1.composing) { this$1.readFromDOMSoon() }
})





    var h = 0, chunk = lineObj.parent;
for (var i = 0; i < chunk.lines.length; ++i) {
var line = chunk.lines[i];
if (line == lineObj) break;
else h += line.height;












  function onCopyCut(e) {
if (signalDOMEvent(cm, e)) { return }
if (cm.somethingSelected()) {
setLastCopied({lineWise: false, text: cm.getSelections()})
if (e.type == "cut") { cm.replaceSelection("", null, "cut") }
} else if (!cm.options.lineWiseCopyCut) {
return
} else {
var ranges = copyableRanges(cm)
setLastCopied({lineWise: true, text: ranges.text})
if (e.type == "cut") {
cm.operation(function () {
cm.setSelections(ranges.ranges, 0, sel_dontScroll)
cm.replaceSelection("", null, "cut")
})
}

    }

    }

    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
for (var i = 0; i < p.children.length; ++i) {
var cur = p.children[i];
if (cur == chunk) break;
else h += cur.height;




    if (e.clipboardData) {
e.clipboardData.clearData()
var content = lastCopied.text.join("\n")
// iOS exposes the clipboard API, but seems to discard content inserted into it
e.clipboardData.setData("Text", content)
if (e.clipboardData.getData("Text") == content) {
e.preventDefault()
return

      }
}

      }
}

    return h;











    // Old-fashioned briefly-focus-a-textarea hack
var kludge = hiddenTextarea(), te = kludge.firstChild
cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild)
te.value = lastCopied.text.join("\n")
var hadFocus = document.activeElement
selectInput(te)
setTimeout(function () {
cm.display.lineSpace.removeChild(kludge)
hadFocus.focus()
if (hadFocus == div) { input.showPrimarySelection() }
}, 50)

  }

  }

 
  on(div, "copy", onCopyCut)
on(div, "cut", onCopyCut)
};





  // Get the bidi ordering for the given line (and cache it). Returns
// false for lines that are fully left-to-right, and an array of
// BidiSpan objects otherwise.
function getOrder(line) {
var order = line.order;
if (order == null) order = line.order = bidiOrdering(line.text);
return order;
}

ContentEditableInput.prototype.prepareSelection = function () {
var result = prepareSelection(this.cm, false)
result.focus = this.cm.state.focused
return result
};








  // HISTORY





ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
if (!info || !this.cm.display.view.length) { return }
if (info.focus || takeFocus) { this.showPrimarySelection() }
this.showMultipleSelections(info)
};





  function History(startGen) {
// Arrays of change events and selections. Doing something adds an
// event to done and clears undo. Undoing moves events from done
// to undone, redoing moves them in the other direction.
this.done = []; this.undone = [];
this.undoDepth = Infinity;
// Used to track when changes can be merged into a single undo
// event
this.lastModTime = this.lastSelTime = 0;
this.lastOp = this.lastSelOp = null;
this.lastOrigin = this.lastSelOrigin = null;
// Used by the isClean() method
this.generation = this.maxGeneration = startGen || 1;
}

ContentEditableInput.prototype.showPrimarySelection = function () {
var sel = window.getSelection(), cm = this.cm, prim = cm.doc.sel.primary()
var from = prim.from(), to = prim.to()
















  // Create a history change event from an updateDoc-style change
// object.
function historyChangeFromChange(doc, change) {
var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
return histChange;

  if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
sel.removeAllRanges()
return





  }


  }


  // Pop all selection events off the end of a history array. Stop at
// a change event.
function clearSelectionEvents(array) {
while (array.length) {
var last = lst(array);
if (last.ranges) array.pop();
else break;
}








  var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset)
if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
cmp(minPos(curAnchor, curFocus), from) == 0 &&
cmp(maxPos(curAnchor, curFocus), to) == 0)
{ return }

var view = cm.display.view
var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
{node: view[0].measure.map[2], offset: 0}
var end = to.line < cm.display.viewTo && posToDOM(cm, to)
if (!end) {
var measure = view[view.length - 1].measure
var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map
end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]}

  }


  }


  // Find the top change event in the history. Pop off selection
// events that are in the way.
function lastChangeEvent(hist, force) {
if (force) {
clearSelectionEvents(hist.done);
return lst(hist.done);
} else if (hist.done.length && !lst(hist.done).ranges) {
return lst(hist.done);
} else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
hist.done.pop();
return lst(hist.done);
}

  if (!start || !end) {
sel.removeAllRanges()
return










  }


  }


  // Register a change in the history. Merges changes that are within
// a single operation, ore are close together with an origin that
// allows merging (starting with "+") into a single event.
function addChangeToHistory(doc, change, selAfter, opId) {
var hist = doc.history;
hist.undone.length = 0;
var time = +new Date, cur;

if ((hist.lastOp == opId ||
hist.lastOrigin == change.origin && change.origin &&
((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
change.origin.charAt(0) == "*")) &&
(cur = lastChangeEvent(hist, hist.lastOp == opId))) {
// Merge this change into the last event
var last = lst(cur.changes);
if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
// Optimized case for simple insertion -- don't want to add
// new changesets for every character typed
last.to = changeEnd(change);
} else {
// Add new sub-event
cur.changes.push(historyChangeFromChange(doc, change));

  var old = sel.rangeCount && sel.getRangeAt(0), rng
try { rng = range(start.node, start.offset, end.offset, end.node) }
catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
if (rng) {
if (!gecko && cm.state.focused) {
sel.collapse(start.node, start.offset)
if (!rng.collapsed) {
sel.removeAllRanges()
sel.addRange(rng)














      }
} else {

      }
} else {

      // Can not be merged, start a new event.
var before = lst(hist.done);
if (!before || !before.ranges)
pushSelectionToHistory(doc.sel, hist.done);
cur = {changes: [historyChangeFromChange(doc, change)],
generation: hist.generation};
hist.done.push(cur);
while (hist.done.length > hist.undoDepth) {
hist.done.shift();
if (!hist.done[0].ranges) hist.done.shift();
}

      sel.removeAllRanges()
sel.addRange(rng)










    }

    }

    hist.done.push(selAfter);
hist.generation = ++hist.maxGeneration;
hist.lastModTime = hist.lastSelTime = time;
hist.lastOp = hist.lastSelOp = opId;
hist.lastOrigin = hist.lastSelOrigin = change.origin;

if (!last) signal(doc, "historyAdded");

    if (old && sel.anchorNode == null) { sel.addRange(old) }
else if (gecko) { this.startGracePeriod() }






  }

  }

 
  this.rememberSelection()
};





  function selectionEventCanBeMerged(doc, origin, prev, sel) {
var ch = origin.charAt(0);
return ch == "*" ||
ch == "+" &&
prev.ranges.length == sel.ranges.length &&
prev.somethingSelected() == sel.somethingSelected() &&
new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500);
}

ContentEditableInput.prototype.startGracePeriod = function () {
var this$1 = this;











  // Called whenever the selection changes, sets the new selection as
// the pending selection in the history, and pushes the old pending
// selection into the 'done' array when it was significantly
// different (in number of selected ranges, emptiness, or time).
function addSelectionToHistory(doc, sel, opId, options) {
var hist = doc.history, origin = options && options.origin;


  clearTimeout(this.gracePeriod)
this.gracePeriod = setTimeout(function () {
this$1.gracePeriod = false
if (this$1.selectionChanged())
{ this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }) }
}, 20)
};





    // A new event is started when the previous origin does not match
// the current, or the origins don't allow matching. Origins
// starting with * are always merged, those starting with + are
// merged when similar and close together in time.
if (opId == hist.lastSelOp ||
(origin && hist.lastSelOrigin == origin &&
(hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
hist.done[hist.done.length - 1] = sel;
else
pushSelectionToHistory(sel, hist.done);

ContentEditableInput.prototype.showMultipleSelections = function (info) {
removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors)
removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection)
};












    hist.lastSelTime = +new Date;
hist.lastSelOrigin = origin;
hist.lastSelOp = opId;
if (options && options.clearRedo !== false)
clearSelectionEvents(hist.undone);
}

ContentEditableInput.prototype.rememberSelection = function () {
var sel = window.getSelection()
this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset
this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset
};






  function pushSelectionToHistory(sel, dest) {
var top = lst(dest);
if (!(top && top.ranges && top.equals(sel)))
dest.push(sel);
}


ContentEditableInput.prototype.selectionInEditor = function () {
var sel = window.getSelection()
if (!sel.rangeCount) { return false }
var node = sel.getRangeAt(0).commonAncestorContainer
return contains(this.div, node)
};





  // Used to store marked span information in the history.
function attachLocalSpans(doc, change, from, to) {
var existing = change["spans_" + doc.id], n = 0;
doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
if (line.markedSpans)
(existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
++n;
});

ContentEditableInput.prototype.focus = function () {
if (this.cm.options.readOnly != "nocursor") {
if (!this.selectionInEditor())
{ this.showSelection(this.prepareSelection(), true) }
this.div.focus()




  }

  }

 
};
ContentEditableInput.prototype.blur = function () { this.div.blur() };
ContentEditableInput.prototype.getField = function () { return this.div };





  // When un/re-doing restores text containing marked spans, those
// that have been explicitly cleared should not be restored.
function removeClearedSpans(spans) {
if (!spans) return null;
for (var i = 0, out; i < spans.length; ++i) {
if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
else if (out) out.push(spans[i]);
}
return !out ? spans : out.length ? out : null;
}

ContentEditableInput.prototype.supportsTouch = function () { return true };














  // Retrieve and filter the old marked spans stored in a change event.
function getOldSpans(doc, change) {
var found = change["spans_" + doc.id];
if (!found) return null;
for (var i = 0, nw = []; i < change.text.length; ++i)
nw.push(removeClearedSpans(found[i]));
return nw;
}

ContentEditableInput.prototype.receivedFocus = function () {
var input = this
if (this.selectionInEditor())
{ this.pollSelection() }
else
{ runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }) }







  // Used both to provide a JSON-safe object in .getHistory, and, when
// detaching a document, to split the history in two
function copyHistoryArray(events, newGroup, instantiateSel) {
for (var i = 0, copy = []; i < events.length; ++i) {
var event = events[i];
if (event.ranges) {
copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
continue;
}
var changes = event.changes, newChanges = [];
copy.push({changes: newChanges});
for (var j = 0; j < changes.length; ++j) {
var change = changes[j], m;
newChanges.push({from: change.from, to: change.to, text: change.text});
if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
if (indexOf(newGroup, Number(m[1])) > -1) {
lst(newChanges)[prop] = change[prop];
delete change[prop];
}
}
}

  function poll() {
if (input.cm.state.focused) {
input.pollSelection()
input.polling.set(input.cm.options.pollInterval, poll)


















    }

    }

    return copy;

 
  }

  }

 
  this.polling.set(this.cm.options.pollInterval, poll)
};





  // Rebasing/resetting history to deal with externally-sourced changes





ContentEditableInput.prototype.selectionChanged = function () {
var sel = window.getSelection()
return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
};





  function rebaseHistSelSingle(pos, from, to, diff) {
if (to < pos.line) {
pos.line += diff;
} else if (from < pos.line) {
pos.line = from;
pos.ch = 0;
}








ContentEditableInput.prototype.pollSelection = function () {
if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
var sel = window.getSelection(), cm = this.cm
// On Android Chrome (version 56, at least), backspacing into an
// uneditable block element will put the cursor in that element,
// and then, because it's not editable, hide the virtual keyboard.
// Because Android doesn't allow us to actually detect backspace
// presses in a sane way, this code checks for when that happens
// and simulates a backspace press in this case.
if (android && chrome && this.cm.options.gutters.length && isInGutter(sel.anchorNode)) {
this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs})
this.blur()
this.focus()
return

  }

  }

 
  if (this.composing) { return }
this.rememberSelection()
var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset)
var head = domToPos(cm, sel.focusNode, sel.focusOffset)
if (anchor && head) { runInOp(cm, function () {
setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll)
if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true }
}) }
};





  // Tries to rebase an array of history events given a change in the
// document. If the change touches the same lines as the event, the
// event, and everything 'behind' it, is discarded. If the change is
// before the event, the event's positions are updated. Uses a
// copy-on-write scheme for the positions, to avoid having to
// reallocate them all on every rebase, but also avoid problems with
// shared position objects being unsafely updated.
function rebaseHistArray(array, from, to, diff) {
for (var i = 0; i < array.length; ++i) {
var sub = array[i], ok = true;
if (sub.ranges) {
if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
for (var j = 0; j < sub.ranges.length; j++) {
rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
}
continue;
}
for (var j = 0; j < sub.changes.length; ++j) {
var cur = sub.changes[j];
if (to < cur.from.line) {
cur.from = Pos(cur.from.line + diff, cur.from.ch);
cur.to = Pos(cur.to.line + diff, cur.to.ch);
} else if (from <= cur.to.line) {
ok = false;
break;
}
}
if (!ok) {
array.splice(0, i + 1);
i = 0;
}
}

ContentEditableInput.prototype.pollContent = function () {
if (this.readDOMTimeout != null) {
clearTimeout(this.readDOMTimeout)
this.readDOMTimeout = null






























  }


  }


  function rebaseHist(hist, change) {
var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
rebaseHistArray(hist.done, from, to, diff);
rebaseHistArray(hist.undone, from, to, diff);





















  var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary()
var from = sel.from(), to = sel.to()
if (from.ch == 0 && from.line > cm.firstLine())
{ from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length) }
if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
{ to = Pos(to.line + 1, 0) }
if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }

var fromIndex, fromLine, fromNode
if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
fromLine = lineNo(display.view[0].line)
fromNode = display.view[0].node
} else {
fromLine = lineNo(display.view[fromIndex].line)
fromNode = display.view[fromIndex - 1].node.nextSibling
}
var toIndex = findViewIndex(cm, to.line)
var toLine, toNode
if (toIndex == display.view.length - 1) {
toLine = display.viewTo - 1
toNode = display.lineDiv.lastChild
} else {
toLine = lineNo(display.view[toIndex + 1].line) - 1
toNode = display.view[toIndex + 1].node.previousSibling

  }


  }


  // EVENT UTILITIES

// Due to the fact that we still support jurassic IE versions, some
// compatibility wrappers are needed.

var e_preventDefault = CodeMirror.e_preventDefault = function(e) {
if (e.preventDefault) e.preventDefault();
else e.returnValue = false;
};
var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) {
if (e.stopPropagation) e.stopPropagation();
else e.cancelBubble = true;
};
function e_defaultPrevented(e) {
return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;

  if (!fromNode) { return false }
var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine))
var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length))
while (newText.length > 1 && oldText.length > 1) {
if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine-- }
else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++ }
else { break }









  }

  }

  var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropagation(e);};

 




  function e_target(e) {return e.target || e.srcElement;}
function e_button(e) {
var b = e.which;
if (b == null) {
if (e.button & 1) b = 1;
else if (e.button & 2) b = 3;
else if (e.button & 4) b = 2;










  var cutFront = 0, cutEnd = 0
var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length)
while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
{ ++cutFront }
var newBot = lst(newText), oldBot = lst(oldText)
var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
oldBot.length - (oldText.length == 1 ? cutFront : 0))
while (cutEnd < maxCutEnd &&
newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
{ ++cutEnd }
// Try to move start of change to start of selection if ambiguous
if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
while (cutFront && cutFront > from.ch &&
newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
cutFront--
cutEnd++

    }

    }

    if (mac && e.ctrlKey && b == 1) b = 3;
return b;

 
  }


  }


  // EVENT HANDLING


  newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "")
newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "")





  // Lightweight event framework. on/off also work on DOM nodes,
// registering native DOM handlers.






  var chFrom = Pos(fromLine, cutFront)
var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0)
if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
replaceRange(cm.doc, newText, chFrom, chTo, "+input")
return true
}
};





  var on = CodeMirror.on = function(emitter, type, f) {
if (emitter.addEventListener)
emitter.addEventListener(type, f, false);
else if (emitter.attachEvent)
emitter.attachEvent("on" + type, f);
else {
var map = emitter._handlers || (emitter._handlers = {});
var arr = map[type] || (map[type] = []);
arr.push(f);
}
};






ContentEditableInput.prototype.ensurePolled = function () {
this.forceCompositionEnd()
};
ContentEditableInput.prototype.reset = function () {
this.forceCompositionEnd()
};
ContentEditableInput.prototype.forceCompositionEnd = function () {
if (!this.composing) { return }
clearTimeout(this.readDOMTimeout)
this.composing = null
this.updateFromDOM()
this.div.blur()
this.div.focus()
};
ContentEditableInput.prototype.readFromDOMSoon = function () {
var this$1 = this;





  var off = CodeMirror.off = function(emitter, type, f) {
if (emitter.removeEventListener)
emitter.removeEventListener(type, f, false);
else if (emitter.detachEvent)
emitter.detachEvent("on" + type, f);
else {
var arr = emitter._handlers && emitter._handlers[type];
if (!arr) return;
for (var i = 0; i < arr.length; ++i)
if (arr[i] == f) { arr.splice(i, 1); break; }

  if (this.readDOMTimeout != null) { return }
this.readDOMTimeout = setTimeout(function () {
this$1.readDOMTimeout = null
if (this$1.composing) {
if (this$1.composing.done) { this$1.composing = null }
else { return }





    }

    }

  };



    this$1.updateFromDOM()
}, 80)
};





  var signal = CodeMirror.signal = function(emitter, type /*, values...*/) {
var arr = emitter._handlers && emitter._handlers[type];
if (!arr) return;
var args = Array.prototype.slice.call(arguments, 2);
for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
};

ContentEditableInput.prototype.updateFromDOM = function () {
var this$1 = this;









  var orphanDelayedCallbacks = null;



  if (this.cm.isReadOnly() || !this.pollContent())
{ runInOp(this.cm, function () { return regChange(this$1.cm); }) }
};





  // Often, we want to signal events at a point where we are in the
// middle of some work, but don't want the handler to start calling
// other methods on the editor, which might be in an inconsistent
// state or simply not expect any other events to happen.
// signalLater looks whether there are any handlers, and schedules
// them to be executed when the last operation ends, or, if no
// operation is active, when a timeout fires.
function signalLater(emitter, type /*, values...*/) {
var arr = emitter._handlers && emitter._handlers[type];
if (!arr) return;
var args = Array.prototype.slice.call(arguments, 2), list;
if (operationGroup) {
list = operationGroup.delayedCallbacks;
} else if (orphanDelayedCallbacks) {
list = orphanDelayedCallbacks;
} else {
list = orphanDelayedCallbacks = [];
setTimeout(fireOrphanDelayed, 0);
}
function bnd(f) {return function(){f.apply(null, args);};};
for (var i = 0; i < arr.length; ++i)
list.push(bnd(arr[i]));
}

ContentEditableInput.prototype.setUneditable = function (node) {
node.contentEditable = "false"
};

























  function fireOrphanDelayed() {
var delayed = orphanDelayedCallbacks;
orphanDelayedCallbacks = null;
for (var i = 0; i < delayed.length; ++i) delayed[i]();
}


ContentEditableInput.prototype.onKeyPress = function (e) {
if (e.charCode == 0) { return }
e.preventDefault()
if (!this.cm.isReadOnly())
{ operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0) }
};





  // The DOM events that CodeMirror handles can be overridden by
// registering a (non-DOM) handler on the editor for the event name,
// and preventDefault-ing the event in that handler.
function signalDOMEvent(cm, e, override) {
if (typeof e == "string")
e = {type: e, preventDefault: function() { this.defaultPrevented = true; }};
signal(cm, override || e.type, cm, e);
return e_defaultPrevented(e) || e.codemirrorIgnore;
}

ContentEditableInput.prototype.readOnlyChanged = function (val) {
this.div.contentEditable = String(val != "nocursor")
};











  function signalCursorActivity(cm) {
var arr = cm._handlers && cm._handlers.cursorActivity;
if (!arr) return;
var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1)
set.push(arr[i]);
}

ContentEditableInput.prototype.onContextMenu = function () {};
ContentEditableInput.prototype.resetPosition = function () {};










  function hasHandler(emitter, type) {
var arr = emitter._handlers && emitter._handlers[type];
return arr && arr.length > 0;
}




ContentEditableInput.prototype.needsContentAttribute = true

function posToDOM(cm, pos) {
var view = findViewForLine(cm, pos.line)
if (!view || view.hidden) { return null }
var line = getLine(cm.doc, pos.line)
var info = mapFromLineView(view, line, pos.line)





  // Add on and off methods to a constructor's prototype, to make
// registering events on such objects more convenient.
function eventMixin(ctor) {
ctor.prototype.on = function(type, f) {on(this, type, f);};
ctor.prototype.off = function(type, f) {off(this, type, f);};

  var order = getOrder(line, cm.doc.direction), side = "left"
if (order) {
var partPos = getBidiPartAt(order, pos.ch)
side = partPos % 2 ? "right" : "left"


  }

  }

 
  var result = nodeAndOffsetInLineMap(info.map, pos.ch, side)
result.offset = result.collapse == "right" ? result.end : result.start
return result
}





  // MISC UTILITIES





function isInGutter(node) {
for (var scan = node; scan; scan = scan.parentNode)
{ if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
return false
}





  // Number of pixels added to scroller and sizer to hide scrollbar
var scrollerGap = 30;

function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }






  // Returned or thrown by various protocols to signal 'I'm not
// handling this'.
var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};

// Reused option objects for setSelection & friends
var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};

function Delayed() {this.id = null;}
Delayed.prototype.set = function(ms, f) {
clearTimeout(this.id);
this.id = setTimeout(f, ms);
};

// Counts the column offset in a string, taking tabs into account.
// Used mostly to find indentation.
var countColumn = CodeMirror.countColumn = function(string, end, tabSize, startIndex, startValue) {
if (end == null) {
end = string.search(/[^\s\u00a0]/);
if (end == -1) end = string.length;

function domTextBetween(cm, from, to, fromLine, toLine) {
var text = "", closing = false, lineSep = cm.doc.lineSeparator()
function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
function close() {
if (closing) {
text += lineSep
closing = false













    }

    }

    for (var i = startIndex || 0, n = startValue || 0;;) {
var nextTab = string.indexOf("\t", i);
if (nextTab < 0 || nextTab >= end)
return n + (end - i);
n += nextTab - i;
n += tabSize - (n % tabSize);
i = nextTab + 1;

  }
function addText(str) {
if (str) {
close()
text += str



    }

    }

  };

// The inverse of countColumn -- find the offset that corresponds to
// a particular column.
function findColumn(string, goal, tabSize) {
for (var pos = 0, col = 0;;) {
var nextTab = string.indexOf("\t", pos);
if (nextTab == -1) nextTab = string.length;
var skipped = nextTab - pos;
if (nextTab == string.length || col + skipped >= goal)
return pos + Math.min(skipped, goal - col);
col += nextTab - pos;
col += tabSize - (col % tabSize);
pos = nextTab + 1;
if (col >= goal) return pos;









  }
function walk(node) {
if (node.nodeType == 1) {
var cmText = node.getAttribute("cm-text")
if (cmText != null) {
addText(cmText || node.textContent.replace(/\u200b/g, ""))
return
}
var markerID = node.getAttribute("cm-marker"), range
if (markerID) {
var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID))
if (found.length && (range = found[0].find(0)))
{ addText(getBetween(cm.doc, range.from, range.to).join(lineSep)) }
return
}
if (node.getAttribute("contenteditable") == "false") { return }
var isBlock = /^(pre|div|p)$/i.test(node.nodeName)
if (isBlock) { close() }
for (var i = 0; i < node.childNodes.length; i++)
{ walk(node.childNodes[i]) }
if (isBlock) { closing = true }
} else if (node.nodeType == 3) {
addText(node.nodeValue)

    }
}

    }
}


var spaceStrs = [""];
function spaceStr(n) {
while (spaceStrs.length <= n)
spaceStrs.push(lst(spaceStrs) + " ");
return spaceStrs[n];

  for (;;) {
walk(from)
if (from == to) { break }
from = from.nextSibling



  }

  }

 
  return text
}





  function lst(arr) { return arr[arr.length-1]; }

var selectInput = function(node) { node.select(); };
if (ios) // Mobile Safari apparently has a bug where select() is broken.
selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; };
else if (ie) // Suppress mysterious IE10 errors
selectInput = function(node) { try { node.select(); } catch(_e) {} };

function indexOf(array, elt) {
for (var i = 0; i < array.length; ++i)
if (array[i] == elt) return i;
return -1;

function domToPos(cm, node, offset) {
var lineNode
if (node == cm.display.lineDiv) {
lineNode = cm.display.lineDiv.childNodes[offset]
if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
node = null; offset = 0
} else {
for (lineNode = node;; lineNode = lineNode.parentNode) {
if (!lineNode || lineNode == cm.display.lineDiv) { return null }
if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
}


  }

  }

  function map(array, f) {
var out = [];
for (var i = 0; i < array.length; i++) out[i] = f(array[i], i);
return out;

  for (var i = 0; i < cm.display.view.length; i++) {
var lineView = cm.display.view[i]
if (lineView.node == lineNode)
{ return locateNodeInLineView(lineView, node, offset) }

  }

  }

 
}





  function createObj(base, props) {
var inst;
if (Object.create) {
inst = Object.create(base);
} else {
var ctor = function() {};
ctor.prototype = base;
inst = new ctor();



function locateNodeInLineView(lineView, node, offset) {
var wrapper = lineView.text.firstChild, bad = false
if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
if (node == wrapper) {
bad = true
node = wrapper.childNodes[offset]
offset = 0
if (!node) {
var line = lineView.rest ? lst(lineView.rest) : lineView.line
return badPos(Pos(lineNo(line), line.text.length), bad)

    }

    }

    if (props) copyObj(props, inst);
return inst;
};

function copyObj(obj, target, overwrite) {
if (!target) target = {};
for (var prop in obj)
if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
target[prop] = obj[prop];
return target;

 
  }


  }


  function bind(f) {
var args = Array.prototype.slice.call(arguments, 1);
return function(){return f.apply(null, args);};


  var textNode = node.nodeType == 3 ? node : null, topNode = node
if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
textNode = node.firstChild
if (offset) { offset = textNode.nodeValue.length }

  }

  }

 
  while (topNode.parentNode != wrapper) { topNode = topNode.parentNode }
var measure = lineView.measure, maps = measure.maps





  var nonASCIISingleCaseWordChar = /[\u00df\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
var isWordCharBasic = CodeMirror.isWordChar = function(ch) {
return /\w/.test(ch) || ch > "\x80" &&
(ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
};
function isWordChar(ch, helper) {
if (!helper) return isWordCharBasic(ch);
if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) return true;
return helper.test(ch);





  function find(textNode, topNode, offset) {
for (var i = -1; i < (maps ? maps.length : 0); i++) {
var map = i < 0 ? measure.map : maps[i]
for (var j = 0; j < map.length; j += 3) {
var curNode = map[j + 2]
if (curNode == textNode || curNode == topNode) {
var line = lineNo(i < 0 ? lineView.line : lineView.rest[i])
var ch = map[j] + offset
if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)] }
return Pos(line, ch)
}
}
}

  }

  }

 
  var found = find(textNode, topNode, offset)
if (found) { return badPos(found, bad) }





  function isEmpty(obj) {
for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
return true;












  // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
found = find(after, after.firstChild, 0)
if (found)
{ return badPos(Pos(found.line, found.ch - dist), bad) }
else
{ dist += after.textContent.length }
}
for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
found = find(before, before.firstChild, -1)
if (found)
{ return badPos(Pos(found.line, found.ch + dist$1), bad) }
else
{ dist$1 += before.textContent.length }

  }

  }

 
}





  // Extending unicode characters. A series of a non-extending char +
// any number of extending chars is treated as a single unit as far
// as editing and measuring is concerned. This is not fully correct,
// since some scripts/fonts/browsers also treat other configurations
// of code points as a group.
var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); }

// TEXTAREA INPUT STYLE











  // DOM UTILITIES




var TextareaInput = function(cm) {
this.cm = cm
// See input.poll and input.reset
this.prevInput = ""





  function elt(tag, content, className, style) {
var e = document.createElement(tag);
if (className) e.className = className;
if (style) e.style.cssText = style;
if (typeof content == "string") e.appendChild(document.createTextNode(content));
else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
return e;
}



  // Flag that indicates whether we expect input to appear real soon
// now (after some event like 'keypress' or 'input') and are
// polling intensively.
this.pollingFast = false
// Self-resetting timeout for the poller
this.polling = new Delayed()
// Used to work around IE issue with selection being forgotten when focus moves away from textarea
this.hasSelection = false
this.composing = null
};





  var range;
if (document.createRange) range = function(node, start, end) {
var r = document.createRange();
r.setEnd(node, end);
r.setStart(node, start);
return r;
};
else range = function(node, start, end) {
var r = document.body.createTextRange();
try { r.moveToElementText(node.parentNode); }
catch(e) { return r; }
r.collapse(true);
r.moveEnd("character", end);
r.moveStart("character", start);
return r;
};

TextareaInput.prototype.init = function (display) {
var this$1 = this;



















  function removeChildren(e) {
for (var count = e.childNodes.length; count > 0; --count)
e.removeChild(e.firstChild);
return e;
}

  var input = this, cm = this.cm









  function removeChildrenAndAdd(parent, e) {
return removeChildren(parent).appendChild(e);
}




  // Wraps and hides input textarea
var div = this.wrapper = hiddenTextarea()
// The semihidden textarea that is focused when the editor is
// focused, and receives input.
var te = this.textarea = div.firstChild
display.wrapper.insertBefore(div, display.wrapper.firstChild)





  function contains(parent, child) {
if (parent.contains)
return parent.contains(child);
while (child = child.parentNode)
if (child == parent) return true;
}

  // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
if (ios) { te.style.width = "0px" }









  function activeElt() { return document.activeElement; }
// Older versions of IE throws unspecified error when touching
// document.activeElement in some cases (during loading, in iframe)
if (ie && ie_version < 11) activeElt = function() {
try { return document.activeElement; }
catch(e) { return document.body; }
};

  on(te, "input", function () {
if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null }
input.poll()
})








  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*"); }
var rmClass = CodeMirror.rmClass = function(node, cls) {
var current = node.className;
var match = classTest(cls).exec(current);
if (match) {
var after = current.slice(match.index + match[0].length);
node.className = current.slice(0, match.index) + (after ? match[1] + after : "");

















  on(te, "paste", function (e) {
if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }

cm.state.pasteIncoming = true
input.fastPoll()
})

function prepareCopyCut(e) {
if (signalDOMEvent(cm, e)) { return }
if (cm.somethingSelected()) {
setLastCopied({lineWise: false, text: cm.getSelections()})
} else if (!cm.options.lineWiseCopyCut) {
return
} else {
var ranges = copyableRanges(cm)
setLastCopied({lineWise: true, text: ranges.text})
if (e.type == "cut") {
cm.setSelections(ranges.ranges, null, sel_dontScroll)
} else {
input.prevInput = ""
te.value = ranges.text.join("\n")
selectInput(te)
}

    }

    }

  };
var addClass = CodeMirror.addClass = function(node, cls) {
var current = node.className;
if (!classTest(cls).test(current)) node.className += (current ? " " : "") + cls;
};
function joinClasses(a, b) {
var as = a.split(" ");
for (var i = 0; i < as.length; i++)
if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i];
return b;

    if (e.type == "cut") { cm.state.cutIncoming = true }










  }

  }

 
  on(te, "cut", prepareCopyCut)
on(te, "copy", prepareCopyCut)





  // WINDOW-WIDE EVENTS





  on(display.scroller, "paste", function (e) {
if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
cm.state.pasteIncoming = true
input.focus()
})





  // These must be handled carefully, because naively registering a
// handler for each editor will cause the editors to never be
// garbage collected.


  // Prevent normal selection in the editor (we handle our own)
on(display.lineSpace, "selectstart", function (e) {
if (!eventInWidget(display, e)) { e_preventDefault(e) }
})





  function forEachCodeMirror(f) {
if (!document.body.getElementsByClassName) return;
var byClass = document.body.getElementsByClassName("CodeMirror");
for (var i = 0; i < byClass.length; i++) {
var cm = byClass[i].CodeMirror;
if (cm) f(cm);

  on(te, "compositionstart", function () {
var start = cm.getCursor("from")
if (input.composing) { input.composing.range.clear() }
input.composing = {
start: start,
range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})

    }

    }

 
  })
on(te, "compositionend", function () {
if (input.composing) {
input.poll()
input.composing.range.clear()
input.composing = null
}
})
};

TextareaInput.prototype.prepareSelection = function () {
// Redraw the selection and/or cursor
var cm = this.cm, display = cm.display, doc = cm.doc
var result = prepareSelection(cm)

// Move the hidden textarea near the cursor to prevent scrolling artifacts
if (cm.options.moveInputWithCursor) {
var headPos = cursorCoords(cm, doc.sel.primary().head, "div")
var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect()
result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
headPos.top + lineOff.top - wrapOff.top))
result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
headPos.left + lineOff.left - wrapOff.left))

  }


  }


  var globalsRegistered = false;
function ensureGlobalHandlers() {
if (globalsRegistered) return;
registerGlobalHandlers();
globalsRegistered = true;






  return result
};

TextareaInput.prototype.showSelection = function (drawn) {
var cm = this.cm, display = cm.display
removeChildrenAndAdd(display.cursorDiv, drawn.cursors)
removeChildrenAndAdd(display.selectionDiv, drawn.selection)
if (drawn.teTop != null) {
this.wrapper.style.top = drawn.teTop + "px"
this.wrapper.style.left = drawn.teLeft + "px"

  }

  }

  function registerGlobalHandlers() {
// When the window resizes, we need to refresh active editors.
var resizeTimer;
on(window, "resize", function() {
if (resizeTimer == null) resizeTimer = setTimeout(function() {
resizeTimer = null;
forEachCodeMirror(onResize);
}, 100);
});
// When the window loses focus, we want to show the editor as blurred
on(window, "blur", function() {
forEachCodeMirror(onBlur);
});




};

// Reset the input to correspond to the selection (or to be empty,
// when not typing and nothing is selected)
TextareaInput.prototype.reset = function (typing) {
if (this.contextMenuPending || this.composing) { return }
var cm = this.cm
if (cm.somethingSelected()) {
this.prevInput = ""
var content = cm.getSelection()
this.textarea.value = content
if (cm.state.focused) { selectInput(this.textarea) }
if (ie && ie_version >= 9) { this.hasSelection = content }
} else if (!typing) {
this.prevInput = this.textarea.value = ""
if (ie && ie_version >= 9) { this.hasSelection = null }

  }

  }

 
};





  // FEATURE DETECTION

TextareaInput.prototype.getField = function () { return this.textarea };





  // Detect drag-and-drop
var dragAndDrop = function() {
// There is *some* kind of drag-and-drop support in IE6-8, but I
// couldn't get it to work yet.
if (ie && ie_version < 9) return false;
var div = elt('div');
return "draggable" in div || "dragDrop" in div;
}();

TextareaInput.prototype.supportsTouch = function () { return false };












  var zwspSupported;
function zeroWidthElement(measure) {
if (zwspSupported == null) {
var test = elt("span", "\u200b");
removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
if (measure.firstChild.offsetHeight != 0)
zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8);
}
if (zwspSupported) return elt("span", "\u200b");
else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");

TextareaInput.prototype.focus = function () {
if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
try { this.textarea.focus() }
catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM







  }

  }

 
};





  // Feature-detect IE's crummy client rect reporting for bidi text
var badBidiRects;
function hasBadBidiRects(measure) {
if (badBidiRects != null) return badBidiRects;
var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
var r0 = range(txt, 0, 1).getBoundingClientRect();
if (!r0 || r0.left == r0.right) return false; // Safari returns null in some cases (#2780)
var r1 = range(txt, 1, 2).getBoundingClientRect();
return badBidiRects = (r1.right - r0.right < 3);
}

TextareaInput.prototype.blur = function () { this.textarea.blur() };














  // See if "".split is the broken IE version, if so, provide an
// alternative way to split lines.
var splitLines = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
var pos = 0, result = [], l = string.length;
while (pos <= l) {
var nl = string.indexOf("\n", pos);
if (nl == -1) nl = string.length;
var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
var rt = line.indexOf("\r");
if (rt != -1) {
result.push(line.slice(0, rt));
pos += rt + 1;
} else {
result.push(line);
pos = nl + 1;
}
}
return result;
} : function(string){return string.split(/\r\n?|\n/);};

TextareaInput.prototype.resetPosition = function () {
this.wrapper.style.top = this.wrapper.style.left = 0
};





















  var hasSelection = window.getSelection ? function(te) {
try { return te.selectionStart != te.selectionEnd; }
catch(e) { return false; }
} : function(te) {
try {var range = te.ownerDocument.selection.createRange();}
catch(e) {}
if (!range || range.parentElement() != te) return false;
return range.compareEndPoints("StartToEnd", range) != 0;
};

TextareaInput.prototype.receivedFocus = function () { this.slowPoll() };

// Poll for input changes, using the normal rate of polling. This
// runs as long as the editor is focused.
TextareaInput.prototype.slowPoll = function () {
var this$1 = this;








  var hasCopyEvent = (function() {
var e = elt("div");
if ("oncopy" in e) return true;
e.setAttribute("oncopy", "return;");
return typeof e.oncopy == "function";
})();

  if (this.pollingFast) { return }
this.polling.set(this.cm.options.pollInterval, function () {
this$1.poll()
if (this$1.cm.state.focused) { this$1.slowPoll() }
})
};





  var badZoomedRects = null;
function hasBadZoomedRects(measure) {
if (badZoomedRects != null) return badZoomedRects;
var node = removeChildrenAndAdd(measure, elt("span", "x"));
var normal = node.getBoundingClientRect();
var fromRange = range(node, 0, 1).getBoundingClientRect();
return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1;




// When an event has just come in that is likely to add or change
// something in the input textarea, we poll faster, to ensure that
// the change appears on the screen quickly.
TextareaInput.prototype.fastPoll = function () {
var missed = false, input = this
input.pollingFast = true
function p() {
var changed = input.poll()
if (!changed && !missed) {missed = true; input.polling.set(60, p)}
else {input.pollingFast = false; input.slowPoll()}

  }

  }

 
  input.polling.set(20, p)
};





  // KEY NAMES








// Read input from the textarea, and update the document to match.
// When something is selected, it is present in the textarea, and
// selected (unless it is huge, in which case a placeholder is
// used). When nothing is selected, the cursor sits after previously
// seen text (can be empty), which is stored in prevInput (we must
// not reset the textarea when typing, because that breaks IME).
TextareaInput.prototype.poll = function () {
var this$1 = this;





  var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod", 107: "=", 109: "-", 127: "Delete",
173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 22