The Tor Browser: comparison browser/devtools/sourceeditor/codemirror/codemirror.js

comparison: browser/devtools/sourceeditor/codemirror/codemirror.js

browser/devtools/sourceeditor/codemirror/codemirror.js

changeset 0: 6474c204b198

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+:b132db4e04d2
+// This is CodeMirror (http://codemirror.net), a code editor
+// implemented in JavaScript on top of the browser's DOM.
+//
+// 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";
+// BROWSER SNIFFING
+// 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(navigator.userAgent);
+// ie_uptoN means Internet Explorer version N or lower
+var ie_upto10 = /MSIE \d/.test(navigator.userAgent);
+var ie_upto7 = ie_upto10 && (document.documentMode == null || document.documentMode < 8);
+var ie_upto8 = ie_upto10 && (document.documentMode == null || document.documentMode < 9);
+var ie_upto9 = ie_upto10 && (document.documentMode == null || document.documentMode < 10);
+var ie_11up = /Trident\/([7-9]|\d{2,})\./.test(navigator.userAgent);
+var ie = ie_upto10 || ie_11up;
+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_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.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 = /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 && 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_upto8);
+// Optimize some code when these features are not used.
+var sawReadOnlySpans = false, sawCollapsedSpans = false;
+// EDITOR CONSTRUCTOR
+// A CodeMirror instance represents an editor. This is the object
+// that user code is usually dealing with.
+function CodeMirror(place, options) {
+if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
+this.options = options = options || {};
+// Determine effective options based on given values and defaults.
+for (var opt in defaults) if (!options.hasOwnProperty(opt))
+options[opt] = defaults[opt];
+setGuttersForLineNumbers(options);
+var doc = options.value;
+if (typeof doc == "string") doc = new Doc(doc, options.mode);
+this.doc = doc;
+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);
+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
+};
+// Override magic textarea content restore that IE sometimes does
+// on our hidden textarea on reload
+if (ie_upto10) setTimeout(bind(resetInput, this, true), 20);
+registerEventHandlers(this);
+var cm = this;
+runInOp(this, function() {
+cm.curOp.forceUpdate = true;
+attachDoc(cm, doc);
+if ((options.autofocus && !mobile) || activeElt() == display.input)
+setTimeout(bind(onFocus, cm), 20);
+else
+onBlur(cm);
+for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
+optionHandlers[opt](cm, options[opt], Init);
+for (var i = 0; i < initHooks.length; ++i) initHooks[i](cm);
+});
+}
+// DISPLAY CONSTRUCTOR
+// The display handles the DOM integration, both for input reading
+// and content drawing. It holds references to DOM nodes and
+// display-related state.
+function Display(place, doc) {
+var d = this;
+// 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");
+// Wraps and hides input textarea
+d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
+// The fake scrollbar elements.
+d.scrollbarH = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
+d.scrollbarV = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
+// Covers bottom-right square when both scrollbars are present.
+d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
+// Covers bottom of gutter when coverGutterNextToScrollbar is on
+// and h scrollbar is present.
+d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
+// 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");
+// 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: " + scrollerCutOff + "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.scrollbarH, d.scrollbarV,
+d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
+// Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
+if (ie_upto7) { 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"; }
+// Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
+if (ie_upto7) d.scrollbarH.style.minHeight = d.scrollbarV.style.minWidth = "18px";
+if (place.appendChild) place.appendChild(d.wrapper);
+else place(d.wrapper);
+// Current rendered range (may be bigger than the view window).
+d.viewFrom = d.viewTo = doc.first;
+// Information about the rendered lines.
+d.view = [];
+// 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.lastSizeC = 0;
+d.updateLineNumbers = null;
+// 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();
+d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
+// Tracks when resetInput has punted to just putting a short
+// string into the textarea instead of the full selection.
+d.inaccurateSelection = false;
+// 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;
+// Used for measuring wheel scrolling granularity
+d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
+// True when shift is held down.
+d.shift = false;
+}
+// STATE UPDATES
+// Used to get the editor into a consistent state again when options change.
+function loadMode(cm) {
+cm.doc.mode = CodeMirror.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.frontier = cm.doc.first;
+startWorker(cm, 100);
+cm.state.modeGen++;
+if (cm.curOp) regChange(cm);
+}
+function wrappingChanged(cm) {
+if (cm.options.lineWrapping) {
+cm.display.wrapper.className += " CodeMirror-wrap";
+cm.display.sizer.style.minWidth = "";
+} else {
+cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", "");
+findMaxLine(cm);
+}
+estimateLineHeights(cm);
+regChange(cm);
+clearCaches(cm);
+setTimeout(function(){updateScrollbars(cm);}, 100);
+}
+// 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;
+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;
+}
+if (wrapping)
+return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th;
+else
+return widgetsHeight + th;
+};
+}
+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);
+});
+}
+function keyMapChanged(cm) {
+var map = keyMap[cm.options.keyMap], style = map.style;
+cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") +
+(style ? " cm-keymap-" + style : "");
+}
+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);
+}
+function guttersChanged(cm) {
+updateGutters(cm);
+regChange(cm);
+setTimeout(function(){alignHorizontally(cm);}, 20);
+}
+// 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";
+var width = gutters.offsetWidth;
+cm.display.sizer.style.marginLeft = width + "px";
+if (i) cm.display.scrollbarH.style.left = cm.options.fixedGutter ? width + "px" : 0;
+}
+// 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;
+}
+return len;
+}
+// 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;
+}
+});
+}
+// 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);
+}
+}
+// SCROLLBARS
+// Prepare DOM reads needed to update the scrollbars. Done in one
+// shot to minimize update/measure roundtrips.
+function measureForScrollbars(cm) {
+var scroll = cm.display.scroller;
+return {
+clientHeight: scroll.clientHeight,
+barHeight: cm.display.scrollbarV.clientHeight,
+scrollWidth: scroll.scrollWidth, clientWidth: scroll.clientWidth,
+barWidth: cm.display.scrollbarH.clientWidth,
+docHeight: Math.round(cm.doc.height + paddingVert(cm.display))
+};
+}
+// Re-synchronize the fake scrollbars with the actual size of the
+// content.
+function updateScrollbars(cm, measure) {
+if (!measure) measure = measureForScrollbars(cm);
+var d = cm.display;
+var scrollHeight = measure.docHeight + scrollerCutOff;
+var needsH = measure.scrollWidth > measure.clientWidth;
+var needsV = scrollHeight > measure.clientHeight;
+if (needsV) {
+d.scrollbarV.style.display = "block";
+d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0";
+// A bug in IE8 can cause this value to be negative, so guard it.
+d.scrollbarV.firstChild.style.height =
+Math.max(0, scrollHeight - measure.clientHeight + (measure.barHeight || d.scrollbarV.clientHeight)) + "px";
+} else {
+d.scrollbarV.style.display = "";
+d.scrollbarV.firstChild.style.height = "0";
+}
+if (needsH) {
+d.scrollbarH.style.display = "block";
+d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0";
+d.scrollbarH.firstChild.style.width =
+(measure.scrollWidth - measure.clientWidth + (measure.barWidth || d.scrollbarH.clientWidth)) + "px";
+} else {
+d.scrollbarH.style.display = "";
+d.scrollbarH.firstChild.style.width = "0";
+}
+if (needsH && needsV) {
+d.scrollbarFiller.style.display = "block";
+d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px";
+} else d.scrollbarFiller.style.display = "";
+if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
+d.gutterFiller.style.display = "block";
+d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px";
+d.gutterFiller.style.width = d.gutters.offsetWidth + "px";
+} else d.gutterFiller.style.display = "";
+if (mac_geLion && scrollbarWidth(d.measure) === 0) {
+d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px";
+var barMouseDown = function(e) {
+if (e_target(e) != d.scrollbarV && e_target(e) != d.scrollbarH)
+operation(cm, onMouseDown)(e);
+};
+on(d.scrollbarV, "mousedown", barMouseDown);
+on(d.scrollbarH, "mousedown", barMouseDown);
+}
+}
+// 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 ? 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)
+return {from: ensureFrom,
+to: lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)};
+if (Math.min(ensureTo, doc.lastLine()) >= to)
+return {from: lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight),
+to: ensureTo};
+}
+return {from: from, to: to};
+}
+// LINE NUMBERS
+// 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";
+}
+// 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";
+var width = display.gutters.offsetWidth;
+display.scrollbarH.style.left = cm.options.fixedGutter ? width + "px" : 0;
+display.sizer.style.marginLeft = width + "px";
+return true;
+}
+return false;
+}
+function lineNumberFor(options, i) {
+return String(options.lineNumberFormatter(i + options.firstLineNumber));
+}
+// 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;
+}
+// DISPLAY DRAWING
+// Updates the display, selection, and scrollbars, using the
+// information in display.view to find out which nodes are no longer
+// up-to-date. Tries to bail out early when no changes are needed,
+// unless forced is true.
+// Returns true if an actual update happened, false otherwise.
+function updateDisplay(cm, viewPort, forced) {
+var oldFrom = cm.display.viewFrom, oldTo = cm.display.viewTo, updated;
+var visible = visibleLines(cm.display, cm.doc, viewPort);
+for (var first = true;; first = false) {
+var oldWidth = cm.display.scroller.clientWidth;
+if (!updateDisplayInner(cm, visible, forced)) break;
+updated = true;
+// If the max line changed since it was last measured, measure it,
+// and ensure the document's width matches it.
+if (cm.display.maxLineChanged && !cm.options.lineWrapping)
+adjustContentWidth(cm);
+var barMeasure = measureForScrollbars(cm);
+updateSelection(cm);
+setDocumentHeight(cm, barMeasure);
+updateScrollbars(cm, barMeasure);
+if (first && cm.options.lineWrapping && oldWidth != cm.display.scroller.clientWidth) {
+forced = true;
+continue;
+}
+forced = false;
+// Clip forced viewport to actual scrollable area.
+if (viewPort && viewPort.top != null)
+viewPort = {top: Math.min(barMeasure.docHeight - scrollerCutOff - barMeasure.clientHeight, viewPort.top)};
+// Updated line heights might result in the drawn area not
+// actually covering the viewport. Keep looping until it does.
+visible = visibleLines(cm.display, cm.doc, viewPort);
+if (visible.from >= cm.display.viewFrom && visible.to <= cm.display.viewTo)
+break;
+}
+cm.display.updateLineNumbers = null;
+if (updated) {
+signalLater(cm, "update", cm);
+if (cm.display.viewFrom != oldFrom || cm.display.viewTo != oldTo)
+signalLater(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
+}
+return updated;
+}
+// Does the actual updating of the line display. Bails out
+// (returning false) when there is nothing to be done and forced is
+// false.
+function updateDisplayInner(cm, visible, forced) {
+var display = cm.display, doc = cm.doc;
+if (!display.wrapper.offsetWidth) {
+resetView(cm);
+return;
+}
+// Bail out if the visible area is already rendered and nothing changed.
+if (!forced && visible.from >= display.viewFrom && visible.to <= display.viewTo &&
+countDirtyView(cm) == 0)
+return;
+if (maybeUpdateLineNumberWidth(cm))
+resetView(cm);
+var dims = getDimensions(cm);
+// Compute a suitable new viewport (from & to)
+var end = doc.first + doc.size;
+var from = Math.max(visible.from - cm.options.viewportMargin, doc.first);
+var to = Math.min(end, 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 different = from != display.viewFrom || to != display.viewTo ||
+display.lastSizeC != display.wrapper.clientHeight;
+adjustView(cm, from, to);
+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 toUpdate = countDirtyView(cm);
+if (!different && toUpdate == 0 && !forced) return;
+// 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, dims);
+if (toUpdate > 4) display.lineDiv.style.display = "";
+// 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();
+// Prevent selection and cursors from interfering with the scroll
+// width.
+removeChildren(display.cursorDiv);
+removeChildren(display.selectionDiv);
+if (different) {
+display.lastSizeC = display.wrapper.clientHeight;
+startWorker(cm, 400);
+}
+updateHeightsInViewport(cm);
+return true;
+}
+function adjustContentWidth(cm) {
+var display = cm.display;
+var width = measureChar(cm, display.maxLine, display.maxLine.text.length).left;
+display.maxLineChanged = false;
+var minWidth = Math.max(0, width + 3);
+var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + minWidth + scrollerCutOff - display.scroller.clientWidth);
+display.sizer.style.minWidth = minWidth + "px";
+if (maxScrollLeft < cm.doc.scrollLeft)
+setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true);
+}
+function setDocumentHeight(cm, measure) {
+cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = measure.docHeight + "px";
+cm.display.gutters.style.height = Math.max(measure.docHeight, measure.clientHeight - scrollerCutOff) + "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_upto7) {
+var bot = cur.node.offsetTop + cur.node.offsetHeight;
+height = bot - prevBottom;
+prevBottom = bot;
+} 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]);
+}
+}
+}
+// 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;
+}
+// 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 = {};
+for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
+left[cm.options.gutters[i]] = n.offsetLeft;
+width[cm.options.gutters[i]] = n.offsetWidth;
+}
+return {fixedPos: compensateForHScroll(d),
+gutterTotalWidth: d.gutters.offsetWidth,
+gutterLeft: left,
+gutterWidth: width,
+wrapperWidth: d.wrapper.clientWidth};
+}
+// 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;
+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;
+}
+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);
+}
+// 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;
+}
+// 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_upto7) lineView.node.style.zIndex = 2;
+}
+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);
+}
+}
+// 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);
+}
+// 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;
+}
+}
+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 || "";
+}
+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", "position: absolute; left: " +
+(cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"),
+lineView.text);
+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"));
+}
+}
+}
+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);
+}
+insertLineWidgets(lineView, dims);
+}
+// 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;
+updateLineClasses(lineView);
+updateLineGutter(cm, lineView, lineN, dims);
+insertLineWidgets(lineView, dims);
+return lineView.node;
+}
+// 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 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.ignoreEvents = true;
+positionLineWidget(widget, node, lineView, dims);
+if (allowAbove && widget.above)
+wrap.insertBefore(node, lineView.gutter || lineView.text);
+else
+wrap.appendChild(node);
+signalLater(widget, "redraw");
+}
+}
+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";
+}
+}
+// POSITION OBJECT
+// 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;
+};
+// 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; };
+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; }
+// SELECTION / CURSOR
+// 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;
+}
+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;
+}
+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;
+}
+return -1;
+}
+};
+function Range(anchor, head) {
+this.anchor = anchor; this.head = head;
+}
+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;
+}
+};
+// 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 simpleSelection(anchor, head) {
+return new Selection([new Range(anchor, head || anchor)], 0);
+}
+// 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;
+}
+// SELECTION UPDATES
+// 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);
+}
+}
+// 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);
+}
+// 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);
+}
+// 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);
+}
+// Reset the selection to a single range.
+function setSimpleSelection(doc, anchor, head, options) {
+setSelection(doc, simpleSelection(anchor, head), options);
+}
+// 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;
+}
+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);
+}
+}
+// 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 setSelectionNoUndo(doc, sel, options) {
+if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
+sel = filterSelectionChange(doc, sel);
+var 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 =
+doc.cm.curOp.cursorActivity = true;
+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);
+}
+// 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);
+}
+}
+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;
+}
+}
+// SELECTION DRAWING
+// Redraw the selection and/or cursor
+function updateSelection(cm) {
+var display = cm.display, doc = cm.doc;
+var curFragment = document.createDocumentFragment();
+var selFragment = document.createDocumentFragment();
+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)
+updateSelectionCursor(cm, range, curFragment);
+if (!collapsed)
+updateSelectionRange(cm, range, selFragment);
+}
+// 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();
+var top = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
+headPos.top + lineOff.top - wrapOff.top));
+var left = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
+headPos.left + lineOff.left - wrapOff.left));
+display.inputDiv.style.top = top + "px";
+display.inputDiv.style.left = left + "px";
+}
+removeChildrenAndAdd(display.cursorDiv, curFragment);
+removeChildrenAndAdd(display.selectionDiv, selFragment);
+}
+// Draws a cursor for the given range
+function updateSelectionCursor(cm, range, output) {
+var pos = cursorCoords(cm, range.head, "div");
+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";
+}
+}
+// Draws the given range as a highlighted selection
+function updateSelectionRange(cm, range, output) {
+var display = cm.display, doc = cm.doc;
+var fragment = document.createDocumentFragment();
+var padding = paddingH(cm.display), leftSide = padding.left, rightSide = display.lineSpace.offsetWidth - padding.right;
+function add(left, top, width, bottom) {
+if (top < 0) top = 0;
+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"));
+}
+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);
+}
+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};
+}
+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);
+}
+}
+if (leftEnd.bottom < rightStart.top)
+add(leftSide, leftEnd.bottom, null, rightStart.top);
+}
+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);
+}
+// HIGHLIGHT WORKER
+function startWorker(cm, time) {
+if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
+cm.state.highlight.set(time, bind(highlightWorker, cm));
+}
+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));
+runInOp(cm, function() {
+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;
+line.styles = highlightLine(cm, line, state, true);
+var ischange = !oldStyles || oldStyles.length != line.styles.length;
+for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
+if (ischange) regLineChange(cm, doc.frontier, "text");
+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;
+}
+});
+});
+}
+// 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;
+}
+}
+return minline;
+}
+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;
+}
+// POSITION MEASUREMENT
+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;
+return display.cachedPaddingH = {left: parseInt(style.paddingLeft),
+right: parseInt(style.paddingRight)};
+}
+// 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 && cm.display.scroller.clientWidth;
+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);
+}
+}
+// 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};
+}
+// 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));
+if (!view)
+view = updateExternalMeasurement(cm, line);
+var info = mapFromLineView(view, line, lineN);
+return {
+line: line, view: view, rect: null,
+map: info.map, cache: info.cache, before: info.before,
+hasHeights: false
+};
+}
+// Given a prepared measurement object, measures the position of an
+// actual character (or fetches it from the cache).
+function measureCharPrepared(cm, prepared, ch, bias) {
+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: found.top, bottom: found.bottom};
+}
+var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
+function measureCharInner(cm, prepared, ch, bias) {
+var map = prepared.map;
+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;
+}
+}
+var rect;
+if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
+while (start && isExtendingChar(prepared.line.text.charAt(mStart + start))) --start;
+while (mStart + end < mEnd && isExtendingChar(prepared.line.text.charAt(mStart + end))) ++end;
+if (ie_upto8 && 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();
+}
+} 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_upto8 && !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 top, bot = (rect.bottom + rect.top) / 2 - prepared.rect.top;
+var heights = prepared.view.measure.heights;
+for (var i = 0; i < heights.length - 1; i++)
+if (bot < heights[i]) break;
+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;
+return result;
+}
+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] = {};
+}
+}
+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 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;
+}
+function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
+function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }
+// 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), 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;
+}
+rect.top += yOff; rect.bottom += yOff;
+return rect;
+}
+// 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;
+}
+var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
+return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
+}
+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.
+function cursorCoords(cm, pos, context, lineObj, preparedMeasure) {
+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");
+if (right) m.left = m.right; else m.right = m.left;
+return intoCoordSystem(cm, lineObj, m, context);
+}
+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;
+}
+// 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};
+}
+// 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;
+}
+// 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;
+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 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);
+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;
+}
+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;
+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;}
+}
+}
+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;
+}
+// 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;
+}
+// OPERATIONS
+// 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 = {
+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
+cursorActivity: false,   // Whether to fire a cursorActivity event
+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 (!delayedCallbackDepth++) delayedCallbacks = [];
+}
+// Finish an operation, updating the display and signalling delayed events
+function endOperation(cm) {
+var op = cm.curOp, doc = cm.doc, display = cm.display;
+cm.curOp = null;
+if (op.updateMaxLine) findMaxLine(cm);
+// If it looks like an update might be needed, call updateDisplay
+if (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) {
+var updated = updateDisplay(cm, {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
+if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroller.scrollTop;
+}
+// If no update was run, but the selection changed, redraw that.
+if (!updated && op.selectionChanged) updateSelection(cm);
+if (!updated && op.startHeight != cm.doc.height) updateScrollbars(cm);
+// Propagate the scroll position to the actual DOM scroller
+if (op.scrollTop != null && display.scroller.scrollTop != op.scrollTop) {
+var top = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop));
+display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = top;
+}
+if (op.scrollLeft != null && display.scroller.scrollLeft != op.scrollLeft) {
+var left = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft));
+display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLeft = left;
+alignHorizontally(cm);
+}
+// If we need to scroll a specific position into view, do so.
+if (op.scrollToPos) {
+var coords = scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos.from),
+clipPos(cm.doc, op.scrollToPos.to), op.scrollToPos.margin);
+if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords);
+}
+if (op.selectionChanged) restartBlink(cm);
+if (cm.state.focused && op.updateInput)
+resetInput(cm, op.typing);
+// 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");
+var delayed;
+if (!--delayedCallbackDepth) {
+delayed = delayedCallbacks;
+delayedCallbacks = null;
+}
+// Fire change events, and delayed event handlers
+if (op.changeObjs) {
+for (var i = 0; i < op.changeObjs.length; i++)
+signal(cm, "change", cm, op.changeObjs[i]);
+signal(cm, "changes", cm, op.changeObjs);
+}
+if (op.cursorActivity) signal(cm, "cursorActivity", cm);
+if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i]();
+}
+// 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); }
+};
+}
+// VIEW TRACKING
+// 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);
+}
+// 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;
+}
+// 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 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 {
+display.viewFrom += lendiff;
+display.viewTo += lendiff;
+}
+} 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 {
+resetView(cm);
+}
+} 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;
+}
+}
+// 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;
+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);
+}
+// Clear the view.
+function resetView(cm) {
+cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
+cm.display.view = [];
+cm.display.viewOffset = 0;
+}
+// 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;
+}
+}
+function viewCuttingPoint(cm, oldN, newN, dir) {
+var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
+if (!sawCollapsedSpans) 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;
+}
+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};
+}
+// 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;
+}
+// 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;
+}
+// INPUT HANDLING
+// 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);
+});
+}
+// 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);}
+}
+cm.display.poll.set(20, p);
+}
+// 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) || isReadOnly(cm) || cm.options.disableInput) return false;
+var text = input.value;
+// If nothing changed, bail.
+if (text == prevInput && !cm.somethingSelected()) return false;
+// Work around nonsensical selection resetting in IE9/10
+if (ie && !ie_upto8 && cm.display.inputHasSelection === text) {
+resetInput(cm);
+return false;
+}
+var withOp = !cm.curOp;
+if (withOp) startOperation(cm);
+cm.display.shift = false;
+// 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);
+// When pasing N lines into N selections, insert one line per selection
+var multiPaste = cm.state.pasteIncoming && textLines.length > 1 && doc.sel.ranges.length == textLines.length;
+// 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 ? [textLines[i]] : 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 electric = cm.getModeAt(range.head).electricChars;
+if (electric) for (var j = 0; j < electric.length; j++)
+if (inserted.indexOf(electric.charAt(j)) > -1) {
+indentLine(cm, range.head.line, "smart");
+break;
+}
+}
+}
+ensureCursorVisible(cm);
+cm.curOp.updateInput = updateInput;
+cm.curOp.typing = true;
+// 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;
+}
+// Reset the input to correspond to the selection (or to be empty,
+// when not typing and nothing is selected)
+function resetInput(cm, typing) {
+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_upto8) cm.display.inputHasSelection = content;
+} else if (!typing) {
+cm.display.prevInput = cm.display.input.value = "";
+if (ie && !ie_upto8) cm.display.inputHasSelection = null;
+}
+cm.display.inaccurateSelection = minimal;
+}
+function focusInput(cm) {
+if (cm.options.readOnly != "nocursor" && (!mobile || activeElt() != cm.display.input))
+cm.display.input.focus();
+}
+function ensureFocus(cm) {
+if (!cm.state.focused) { focusInput(cm); onFocus(cm); }
+}
+function isReadOnly(cm) {
+return cm.options.readOnly || cm.doc.cantEdit;
+}
+// EVENT HANDLERS
+// 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_upto10)
+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 = findWordAt(cm.doc, 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);});
+// 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);
+}
+});
+on(d.scrollbarV, "scroll", function() {
+if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop);
+});
+on(d.scrollbarH, "scroll", function() {
+if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft);
+});
+// 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);});
+// Prevent clicks in the scrollbars from killing focus
+function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); }
+on(d.scrollbarH, "mousedown", reFocus);
+on(d.scrollbarV, "mousedown", reFocus);
+// Prevent wrapper from ever scrolling
+on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
+// When the window resizes, we need to refresh active editors.
+var resizeTimer;
+function onResize() {
+if (resizeTimer == null) resizeTimer = setTimeout(function() {
+resizeTimer = null;
+// Might be a text scaling operation, clear size caches.
+d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = knownScrollbarWidth = null;
+cm.setSize();
+}, 100);
+}
+on(window, "resize", onResize);
+// The above handler holds on to the editor and its data
+// structures. Here we poll to unregister it when the editor is no
+// longer in the document, so that it can be garbage-collected.
+function unregister() {
+if (contains(document.body, d.wrapper)) setTimeout(unregister, 5000);
+else off(window, "resize", onResize);
+}
+setTimeout(unregister, 5000);
+on(d.input, "keyup", operation(cm, onKeyUp));
+on(d.input, "input", function() {
+if (ie && !ie_upto8 && cm.display.inputHasSelection) cm.display.inputHasSelection = null;
+fastPoll(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));
+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() {
+cm.state.pasteIncoming = true;
+fastPoll(cm);
+});
+function prepareCopy(e) {
+if (d.inaccurateSelection) {
+d.prevInput = "";
+d.inaccurateSelection = false;
+d.input.value = cm.getSelection();
+selectInput(d.input);
+}
+if (e.type == "cut") cm.state.cutIncoming = true;
+}
+on(d.input, "cut", prepareCopy);
+on(d.input, "copy", prepareCopy);
+// Needed to handle Tab key in KHTML
+if (khtml) on(d.sizer, "mouseup", function() {
+if (activeElt() == d.input) d.input.blur();
+focusInput(cm);
+});
+}
+// MOUSE EVENTS
+// 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.ignoreEvents || n.parentNode == display.sizer && n != display.mover) return true;
+}
+}
+// 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) {
+var target = e_target(e);
+if (target == display.scrollbarH || target == display.scrollbarV ||
+target == display.scrollbarFiller || target == display.gutterFiller) return null;
+}
+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.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff);
+}
+return coords;
+}
+// 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 (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();
+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;
+}
+}
+var lastClick, lastDoubleClick;
+function leftButtonDown(cm, e, start) {
+setTimeout(bind(ensureFocus, cm), 0);
+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};
+}
+var sel = cm.doc.sel, addNew = mac ? e.metaKey : e.ctrlKey;
+if (cm.options.dragDrop && dragAndDrop && !addNew && !isReadOnly(cm) &&
+type == "single" && sel.contains(start) > -1 && sel.somethingSelected())
+leftButtonStartDrag(cm, e, start);
+else
+leftButtonSelect(cm, e, start, type, addNew);
+}
+// 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) {
+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);
+extendSelection(cm.doc, start);
+focusInput(cm);
+// Work around unexplainable focus problem in IE9 (#2127)
+if (ie_upto10 && !ie_upto8)
+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);
+}
+// Normal selection, as opposed to text dragging.
+function leftButtonSelect(cm, e, start, type, addNew) {
+var display = cm.display, doc = cm.doc;
+e_preventDefault(e);
+var ourRange, ourIndex, startSel = doc.sel;
+if (addNew) {
+ourIndex = doc.sel.contains(start);
+if (ourIndex > -1)
+ourRange = doc.sel.ranges[ourIndex];
+else
+ourRange = new Range(start, start);
+} else {
+ourRange = doc.sel.primary();
+}
+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 = findWordAt(doc, 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 {
+ourRange = extendRange(doc, ourRange, start);
+}
+if (!addNew) {
+ourIndex = 0;
+setSelection(doc, new Selection([ourRange], 0), sel_mouse);
+} else if (ourIndex > -1) {
+replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
+} else {
+ourIndex = doc.sel.ranges.length;
+setSelection(doc, normalizeSelection(doc.sel.ranges.concat([ourRange]), ourIndex),
+{scroll: false, origin: "*mouse"});
+}
+var lastPos = start;
+function extendTo(pos) {
+if (cmp(lastPos, pos) == 0) return;
+lastPos = pos;
+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), sel_mouse);
+} else {
+var oldRange = ourRange;
+var anchor = oldRange.anchor, head = pos;
+if (type != "single") {
+if (type == "double")
+var range = findWordAt(doc, 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);
+}
+}
+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;
+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);
+}
+}
+function done(e) {
+counter = Infinity;
+e_preventDefault(e);
+focusInput(cm);
+off(document, "mousemove", move);
+off(document, "mouseup", up);
+doc.history.lastSelOrigin = null;
+}
+var move = operation(cm, function(e) {
+if ((ie && !ie_upto9) ?  !e.buttons : !e_button(e)) done(e);
+else extend(e);
+});
+var up = operation(cm, done);
+on(document, "mousemove", move);
+on(document, "mouseup", up);
+}
+// 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);
+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];
+signalfn(cm, type, cm, line, gutter, e);
+return e_defaultPrevented(e);
+}
+}
+}
+function clickInGutter(cm, e) {
+return gutterEvent(cm, e, "gutterClick", true, signalLater);
+}
+// 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;
+if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
+return;
+e_preventDefault(e);
+if (ie_upto10) 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 = 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) {
+var selected = cm.state.draggingText && 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){}
+}
+}
+function onDragStart(cm, e) {
+if (ie_upto10 && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
+if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
+e.dataTransfer.setData("Text", cm.getSelection());
+// 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);
+}
+}
+// SCROLL EVENTS
+// 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) updateDisplay(cm, {top: val});
+if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
+if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val;
+if (gecko) updateDisplay(cm);
+startWorker(cm, 100);
+}
+// 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;
+if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val;
+}
+// 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 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;
+function onScrollWheel(cm, 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;
+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;
+// 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 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;
+}
+// '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);
+updateDisplay(cm, {top: top, bottom: bot});
+}
+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;
+}
+}
+}
+// 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;
+}
+// Collect the currently active keymaps.
+function allKeyMaps(cm) {
+var maps = cm.state.keyMaps.slice(0);
+if (cm.options.extraKeys) maps.push(cm.options.extraKeys);
+maps.push(cm.options.keyMap);
+return maps;
+}
+var maybeTransition;
+// Handle a key from the keydown event.
+function handleKeyBinding(cm, e) {
+// Handle automatic keymap transitions
+var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto;
+clearTimeout(maybeTransition);
+if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
+if (getKeyMap(cm.options.keyMap) == startMap) {
+cm.options.keyMap = (next.call ? next.call(null, cm) : next);
+keyMapChanged(cm);
+}
+}, 50);
+var name = keyName(e, true), handled = false;
+if (!name) return false;
+var keymaps = allKeyMaps(cm);
+if (e.shiftKey) {
+// 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-'.
+handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandleBinding(cm, b, true);})
+|| lookupKey(name, keymaps, function(b) {
+if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
+return doHandleBinding(cm, b);
+});
+} else {
+handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm, b); });
+}
+if (handled) {
+e_preventDefault(e);
+restartBlink(cm);
+signalLater(cm, "keyHandled", cm, name, e);
+}
+return handled;
+}
+// Handle a key from the keypress event
+function handleCharBinding(cm, e, ch) {
+var handled = lookupKey("'" + ch + "'", allKeyMaps(cm),
+function(b) { return doHandleBinding(cm, b, true); });
+if (handled) {
+e_preventDefault(e);
+restartBlink(cm);
+signalLater(cm, "keyHandled", cm, "'" + ch + "'", e);
+}
+return handled;
+}
+var lastStoppedKey = null;
+function onKeyDown(e) {
+var cm = this;
+ensureFocus(cm);
+if (signalDOMEvent(cm, e)) return;
+// IE does strange things with escape.
+if (ie_upto10 && 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");
+}
+}
+function onKeyUp(e) {
+if (signalDOMEvent(this, e)) return;
+if (e.keyCode == 16) this.doc.sel.shift = false;
+}
+function onKeyPress(e) {
+var cm = this;
+if (signalDOMEvent(cm, e)) 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_upto8) cm.display.inputHasSelection = null;
+fastPoll(cm);
+}
+// FOCUS/BLUR EVENTS
+function onFocus(cm) {
+if (cm.options.readOnly == "nocursor") return;
+if (!cm.state.focused) {
+signal(cm, "focus", cm);
+cm.state.focused = true;
+if (cm.display.wrapper.className.search(/\bCodeMirror-focused\b/) == -1)
+cm.display.wrapper.className += " CodeMirror-focused";
+if (!cm.curOp) {
+resetInput(cm);
+if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730
+}
+}
+slowPoll(cm);
+restartBlink(cm);
+}
+function onBlur(cm) {
+if (cm.state.focused) {
+signal(cm, "blur", cm);
+cm.state.focused = false;
+cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-focused", "");
+}
+clearInterval(cm.display.blinker);
+setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 150);
+}
+// CONTEXT MENU HANDLING
+var detectingSelectAll;
+// 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 pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
+if (!pos || presto) return; // Opera is difficult.
+// 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);
+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);";
+focusInput(cm);
+resetInput(cm);
+// Adds "Select all" to context menu in FF
+if (!cm.somethingSelected()) display.input.value = display.prevInput = " ";
+// 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 extval = display.input.value = "\u200b" + (cm.somethingSelected() ? display.input.value : "");
+display.prevInput = "\u200b";
+display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
+}
+}
+function rehide() {
+display.inputDiv.style.position = "relative";
+display.input.style.cssText = oldCSS;
+if (ie_upto8) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
+slowPoll(cm);
+// Try to detect the user choosing select-all
+if (display.input.selectionStart != null) {
+if (!ie || ie_upto8) prepareSelectAllHack();
+clearTimeout(detectingSelectAll);
+var i = 0, poll = function(){
+if (display.prevInput == "\u200b" && display.input.selectionStart == 0)
+operation(cm, commands.selectAll)(cm);
+else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
+else resetInput(cm);
+};
+detectingSelectAll = setTimeout(poll, 200);
+}
+}
+if (ie && !ie_upto8) prepareSelectAllHack();
+if (captureRightClick) {
+e_stop(e);
+var mouseup = function() {
+off(window, "mouseup", mouseup);
+setTimeout(rehide, 20);
+};
+on(window, "mouseup", mouseup);
+} else {
+setTimeout(rehide, 50);
+}
+}
+function contextMenuInGutter(cm, e) {
+if (!hasHandler(cm, "gutterContextMenu")) return false;
+return gutterEvent(cm, e, "gutterContextMenu", false, signal);
+}
+// UPDATING
+// 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);
+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 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 new Selection(out, doc.sel.primIndex);
+}
+// 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);
+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;
+}
+if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
+change = filterChange(doc, change, true);
+if (!change) return;
+}
+// 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 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);
+makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
+var rebased = [];
+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));
+});
+}
+// Revert a change stored in a document's history.
+function makeChangeFromHistory(doc, type, allowSelectionOnly) {
+if (doc.cm && doc.cm.state.suppressEdits) return;
+var hist = doc.history, event, selAfter = doc.sel;
+var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
+// 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 (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;
+}
+// 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");
+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;
+}
+antiChanges.push(historyChangeFromChange(doc, change));
+var after = i ? computeSelAfterChange(doc, change, null) : lst(source);
+makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
+if (doc.cm) ensureCursorVisible(doc.cm);
+var rebased = [];
+// 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));
+});
+}
+}
+// Sub-views need their line numbers shifted when text is added
+// above or below them in the parent document.
+function shiftDoc(doc, distance) {
+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);
+}
+// 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);
+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;
+// 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};
+}
+change.removed = getBetween(doc, change.from, change.to);
+if (!selAfter) selAfter = computeSelAfterChange(doc, change, null);
+if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans);
+else updateDoc(doc, change, spans);
+setSelectionNoUndo(doc, selAfter, sel_dontScroll);
+}
+// 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;
+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 (doc.sel.contains(change.from, change.to) > -1)
+cm.curOp.cursorActivity = true;
+updateDoc(doc, change, spans, estimateHeight(cm));
+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;
+}
+// Adjust frontier, schedule worker
+doc.frontier = Math.min(doc.frontier, from.line);
+startWorker(cm, 400);
+var lendiff = change.text.length - (to.line - from.line) - 1;
+// Remember that these lines changed, for updating the display
+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);
+if (hasHandler(cm, "change") || hasHandler(cm, "changes"))
+(cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push({
+from: from, to: to,
+text: change.text,
+removed: change.removed,
+origin: change.origin
+});
+}
+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});
+}
+// SCROLLING THINGS INTO VIEW
+// 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) {
+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 + scrollerCutOff) + "px; left: " +
+coords.left + "px; width: 2px;");
+cm.display.lineSpace.appendChild(scrollNode);
+scrollNode.scrollIntoView(doScroll);
+cm.display.lineSpace.removeChild(scrollNode);
+}
+}
+// 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 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;
+}
+if (scrollPos.scrollLeft != null) {
+setScrollLeft(cm, scrollPos.scrollLeft);
+if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
+}
+if (!changed) return coords;
+}
+}
+// 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);
+}
+// 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 = display.scroller.clientHeight - scrollerCutOff, result = {};
+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;
+}
+var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
+var screenw = display.scroller.clientWidth - scrollerCutOff;
+x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
+var gutterw = display.gutters.offsetWidth;
+var atLeft = x1 < gutterw + 10;
+if (x1 < screenleft + gutterw || atLeft) {
+if (atLeft) x1 = 0;
+result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
+} else if (x2 > screenw + screenleft - 3) {
+result.scrollLeft = x2 + 10 - screenw;
+}
+return result;
+}
+// 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;
+}
+// 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};
+}
+// 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);
+}
+}
+// API UTILITIES
+// 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 (!cm.doc.mode.indent) how = "prev";
+else state = getStateBefore(cm, n);
+}
+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 = cm.doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
+if (indentation == Pass) {
+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;
+}
+indentation = Math.max(0, indentation);
+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);
+if (indentString != curSpaceString) {
+replaceRange(cm.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;
+}
+// Utility for applying a change to a line by handle or number,
+// returning the number and optionally registering the line as
+// changed.
+function changeLine(cm, handle, changeType, op) {
+var no = handle, line = handle, doc = cm.doc;
+if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
+else no = lineNo(handle);
+if (no == null) return null;
+if (op(line, no)) regLineChange(cm, no, changeType);
+else return null;
+return line;
+}
+// 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);
+});
+}
+// 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;
+}
+if (unit == "char") moveOnce();
+else if (unit == "column") moveOnce(true);
+else if (unit == "word" || unit == "group") {
+var sawType = null, group = unit == "group";
+for (var first = true;; first = false) {
+if (dir < 0 && !moveOnce(!first)) break;
+var cur = lineObj.text.charAt(ch) || "\n";
+var type = isWordChar(cur) ? "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;
+}
+if (type) sawType = type;
+if (dir > 0 && !moveOnce(!first)) break;
+}
+}
+var result = skipAtomic(doc, Pos(line, ch), origDir, true);
+if (!possible) result.hitSide = true;
+return result;
+}
+// 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;
+}
+// Find the word at the given position (as returned by coordsChar).
+function findWordAt(doc, pos) {
+var line = getLine(doc, pos.line).text;
+var start = pos.ch, end = pos.ch;
+if (line) {
+if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
+var startChar = line.charAt(start);
+var check = isWordChar(startChar) ? isWordChar
+: /\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));
+}
+// EDITOR METHODS
+// 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.
+CodeMirror.prototype = {
+constructor: CodeMirror,
+focus: function(){window.focus(); focusInput(this); fastPoll(this);},
+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);
+},
+getOption: function(option) {return this.options[option];},
+getDoc: function() {return this.doc;},
+addKeyMap: function(map, bottom) {
+this.state.keyMaps[bottom ? "push" : "unshift"](map);
+},
+removeKeyMap: function(map) {
+var maps = this.state.keyMaps;
+for (var i = 0; i < maps.length; ++i)
+if (maps[i] == map || (typeof maps[i] != "string" && 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;
+}
+}
+}),
+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 start = Math.max(end, range.from().line);
+var to = range.to();
+end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
+for (var j = start; j < end; ++j)
+indentLine(this, j, how);
+} 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);
+}
+}
+}),
+// 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) {
+var doc = this.doc;
+pos = clipPos(doc, pos);
+var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode;
+var line = getLine(doc, pos.line);
+var stream = new StringStream(line.text, this.options.tabSize);
+while (stream.pos < pos.ch && !stream.eol()) {
+stream.start = stream.pos;
+var style = mode.token(stream, state);
+}
+return {start: stream.start,
+end: stream.pos,
+string: stream.current(),
+type: style || null,
+state: state};
+},
+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;
+if (ch == 0) return styles[2];
+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 return styles[mid * 2 + 2];
+}
+},
+getModeAt: function(pos) {
+var mode = this.doc.mode;
+if (!mode.innerMode) return mode;
+return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
+},
+getHelper: function(pos, type) {
+return this.getHelpers(pos, type)[0];
+},
+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;
+},
+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);
+},
+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");
+},
+charCoords: function(pos, mode) {
+return charCoords(this, clipPos(this.doc, pos), mode || "page");
+},
+coordsChar: function(coords, mode) {
+coords = fromCoordSystem(this, coords, mode || "page");
+return coordsChar(this, coords.left, coords.top);
+},
+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);
+},
+defaultTextHeight: function() { return textHeight(this.display); },
+defaultCharWidth: function() { return charWidth(this.display); },
+setGutterMarker: methodOp(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: 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;
+});
+}),
+addLineClass: methodOp(function(handle, where, cls) {
+return changeLine(this, handle, "class", function(line) {
+var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
+if (!line[prop]) line[prop] = cls;
+else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) return false;
+else line[prop] += " " + cls;
+return true;
+});
+}),
+removeLineClass: methodOp(function(handle, where, cls) {
+return changeLine(this, handle, "class", function(line) {
+var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
+var cur = line[prop];
+if (!cur) return false;
+else if (cls == null) line[prop] = null;
+else {
+var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)"));
+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;
+});
+}),
+addLineWidget: methodOp(function(handle, node, options) {
+return addLineWidget(this, handle, node, options);
+}),
+removeLineWidget: function(widget) { widget.clear(); },
+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};
+},
+getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo};},
+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";
+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);
+},
+triggerOnKeyDown: methodOp(onKeyDown),
+triggerOnKeyPress: methodOp(onKeyPress),
+triggerOnKeyUp: methodOp(onKeyUp),
+execCommand: function(cmd) {
+if (commands.hasOwnProperty(cmd))
+return commands[cmd](this);
+},
+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;
+},
+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);
+}),
+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};
+});
+}),
+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;
+},
+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];
+}),
+toggleOverwrite: function(value) {
+if (value != null && value == this.state.overwrite) return;
+if (this.state.overwrite = !this.state.overwrite)
+this.display.cursorDiv.className += " CodeMirror-overwrite";
+else
+this.display.cursorDiv.className = this.display.cursorDiv.className.replace(" CodeMirror-overwrite", "");
+signal(this, "overwriteToggle", this, this.state.overwrite);
+},
+hasFocus: function() { return activeElt() == this.display.input; },
+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, co = scrollerCutOff;
+return {left: scroller.scrollLeft, top: scroller.scrollTop,
+height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
+clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co};
+},
+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;
+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);
+}
+}),
+setSize: methodOp(function(width, height) {
+function interpret(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);
+this.curOp.forceUpdate = true;
+signal(this, "refresh", this);
+}),
+operation: function(f){return runInOp(this, f);},
+refresh: methodOp(function() {
+var oldHeight = this.display.cachedTextHeight;
+regChange(this);
+clearCaches(this);
+this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop);
+if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
+estimateLineHeights(this);
+signal(this, "refresh", this);
+}),
+swapDoc: methodOp(function(doc) {
+var old = this.doc;
+old.cm = null;
+attachDoc(this, doc);
+clearCaches(this);
+resetInput(this);
+this.scrollTo(doc.scrollLeft, doc.scrollTop);
+signalLater(this, "swapDoc", this, old);
+return old;
+}),
+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);
+// OPTION DEFAULTS
+// The default configuration options.
+var defaults = CodeMirror.defaults = {};
+// Functions to run when options are changed.
+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;
+}
+// Passed to option handlers when there is no old value.
+var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
+// 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);
+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\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);
+option("theme", "default", function(cm) {
+themeChanged(cm);
+guttersChanged(cm);
+}, true);
+option("keyMap", "default", keyMapChanged);
+option("extraKeys", 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, updateScrollbars, 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("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);
+option("cursorBlinkRate", 530);
+option("cursorScrollMargin", 0);
+option("cursorHeight", 1);
+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;
+});
+option("tabindex", null, function(cm, val) {
+cm.display.input.tabIndex = val || "";
+});
+option("autofocus", null);
+// MODE DEFINITION AND QUERYING
+// Known modes, by name and by MIME
+var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.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.)
+CodeMirror.defineMode = function(name, mode) {
+if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
+if (arguments.length > 2) {
+mode.dependencies = [];
+for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]);
+}
+modes[name] = mode;
+};
+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 (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];
+}
+}
+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 modeObj;
+};
+// Minimal default mode.
+CodeMirror.defineMode("null", function() {
+return {token: function(stream) {stream.skipToEnd();}};
+});
+CodeMirror.defineMIME("text/plain", "null");
+// 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);
+};
+// EXTENSIONS
+CodeMirror.defineExtension = function(name, func) {
+CodeMirror.prototype[name] = func;
+};
+CodeMirror.defineDocExtension = function(name, func) {
+Doc.prototype[name] = func;
+};
+CodeMirror.defineOption = option;
+var initHooks = [];
+CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
+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});
+};
+// MODE STATE HANDLING
+// Utility functions for working with state. Exported because nested
+// modes need to do this for their inner modes.
+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;
+};
+var startState = CodeMirror.startState = function(mode, a1, a2) {
+return mode.startState ? mode.startState(a1, a2) : true;
+};
+// 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};
+};
+// STANDARD COMMANDS
+// 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()};
+});
+},
+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); }, sel_move);
+},
+goLineStartSmart: function(cm) {
+cm.extendSelectionsBy(function(range) {
+var start = lineStart(cm, range.head.line);
+var line = cm.getLineHandle(start.line);
+var order = getOrder(line);
+if (!order || order[0].level == 0) {
+var firstNonWS = Math.max(0, line.text.search(/\S/));
+var inWS = range.head.line == start.line && range.head.ch <= firstNonWS && range.head.ch;
+return Pos(start.line, inWS ? 0 : firstNonWS);
+}
+return start;
+}, sel_move);
+},
+goLineEnd: function(cm) {
+cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); }, sel_move);
+},
+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);
+},
+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");},
+defaultTab: function(cm) {
+if (cm.somethingSelected()) cm.indentSelection("add");
+else cm.execCommand("insertTab");
+},
+transposeChars: function(cm) {
+runInOp(cm, function() {
+var ranges = cm.listSelections();
+for (var i = 0; i < ranges.length; i++) {
+var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
+if (cur.ch > 0 && cur.ch < line.length - 1)
+cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
+Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
+}
+});
+},
+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();}
+};
+// STANDARD KEYMAPS
+var keyMap = CodeMirror.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-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
+"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"
+};
+keyMap.macDefault = {
+"Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
+"Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
+"Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "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": "delLineLeft",
+"Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection",
+fallthrough: ["basic", "emacsy"]
+};
+// 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["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
+// KEYMAP DISPATCH
+function getKeyMap(val) {
+if (typeof val == "string") return keyMap[val];
+else return val;
+}
+// Given an array of keymaps and a key name, call handle on any
+// bindings found, until that returns a truthy value, at which point
+// we consider the key handled. Implements things like binding a key
+// to false stopping further handling and keymap fallthrough.
+var lookupKey = CodeMirror.lookupKey = function(name, maps, handle) {
+function lookup(map) {
+map = getKeyMap(map);
+var found = map[name];
+if (found === false) return "stop";
+if (found != null && handle(found)) return true;
+if (map.nofallthrough) return "stop";
+var fallthrough = map.fallthrough;
+if (fallthrough == null) return false;
+if (Object.prototype.toString.call(fallthrough) != "[object Array]")
+return lookup(fallthrough);
+for (var i = 0; i < fallthrough.length; ++i) {
+var done = lookup(fallthrough[i]);
+if (done) return done;
+}
+return false;
+}
+for (var i = 0; i < maps.length; ++i) {
+var done = lookup(maps[i]);
+if (done) return done != "stop";
+}
+};
+// Modifier key presses don't count as 'real' key presses for the
+// purpose of keymap fallthrough.
+var isModifierKey = CodeMirror.isModifierKey = function(event) {
+var name = keyNames[event.keyCode];
+return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
+};
+// 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 name = keyNames[event.keyCode];
+if (name == null || event.altGraphKey) return false;
+if (event.altKey) name = "Alt-" + name;
+if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name;
+if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name;
+if (!noShift && event.shiftKey) name = "Shift-" + name;
+return name;
+};
+// FROMTEXTAREA
+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;
+}
+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) {}
+}
+}
+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() {
+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;
+};
+// STRING STREAM
+// Fed to the mode parsers, provides helper functions to make
+// parsers more succinct.
+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;
+};
+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; }
+}
+};
+// TEXTMARKERS
+// 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.
+var TextMarker = CodeMirror.TextMarker = function(doc, type) {
+this.lines = [];
+this.type = type;
+this.doc = doc;
+};
+eventMixin(TextMarker);
+// 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);
+}
+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 (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);
+if (withOp) endOperation(cm);
+};
+// 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;
+}
+}
+return from && {from: from, to: to};
+};
+// 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;
+}
+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);
+}
+});
+};
+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);
+}
+};
+// 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;
+// 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 marker = new TextMarker(doc, type), diff = cmp(from, to);
+if (options) copyObj(options, marker);
+// 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.ignoreEvents = 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");
+sawCollapsedSpans = true;
+}
+if (marker.addToHistory)
+addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN);
+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);
+});
+if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
+if (marker.readOnly) {
+sawReadOnlySpans = true;
+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)
+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;
+}
+// SHARED TEXTMARKERS
+// 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, me = this; i < markers.length; ++i) {
+markers[i].parent = this;
+on(markers[i], "clear", function(){me.clear();});
+}
+};
+eventMixin(SharedTextMarker);
+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);
+};
+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);
+}
+// TEXTMARKER SPANS
+function MarkedSpan(marker, from, to) {
+this.marker = marker;
+this.from = from; this.to = to;
+}
+// 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) {
+for (var r, 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);
+}
+// 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));
+}
+}
+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));
+}
+}
+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) {
+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;
+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);
+// 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;
+}
+}
+}
+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);
+}
+} else {
+span.from += offset;
+if (sameLine) (first || (first = [])).push(span);
+}
+}
+}
+// Make sure we didn't create any zero-length spans
+if (first) first = clearEmptySpans(first);
+if (last && last != first) last = clearEmptySpans(last);
+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;
+}
+// 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 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;
+}
+}
+return old;
+}
+// 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;
+}
+// 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, 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 && (cmp(found.to, from) || extraRight(sp.marker) - extraLeft(marker)) > 0 ||
+fromCmp >= 0 && (cmp(found.from, to) || extraLeft(sp.marker) - extraRight(marker)) < 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;
+}
+// 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;
+}
+// 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;
+}
+// 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;
+}
+}
+// LINE WIDGETS
+// Line widgets are block elements displayed above or below a line.
+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);
+function adjustScrollWhenAboveVisible(cm, line, diff) {
+if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
+addToScrollPos(cm, null, diff);
+}
+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);
+});
+};
+function widgetHeight(widget) {
+if (widget.height != null) return widget.height;
+if (!contains(document.body, widget.node))
+removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
+return widget.height = widget.node.offsetHeight;
+}
+function addLineWidget(cm, handle, node, options) {
+var widget = new LineWidget(cm, node, options);
+if (widget.noHScroll) cm.display.alignWidgets = true;
+changeLine(cm, 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;
+}
+// LINE DATA STRUCTURE
+// 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); };
+// 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);
+}
+// Detach a line from the document tree and its markers.
+function cleanUpLine(line) {
+line.parent = null;
+detachMarkedSpans(line);
+}
+// Run the given mode's parser over a line, calling f for each token.
+function runMode(cm, text, mode, state, f, 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;
+if (text == "" && mode.blankLine) mode.blankLine(state);
+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;
+} else {
+style = mode.token(stream, state);
+}
+if (cm.options.addModeClass) {
+var mName = CodeMirror.innerMode(mode, state).mode.name;
+if (mName) style = "m-" + (style ? mName + " " + style : mName);
+}
+if (!flattenSpans || curStyle != style) {
+if (curStart < stream.start) f(stream.start, curStyle);
+curStart = stream.start; 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;
+}
+}
+// 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];
+// Compute the base array of styles
+runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
+st.push(end, style);
+}, forceToEnd);
+// 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, style);
+i = start + 2;
+} else {
+for (; start < i; start += 2) {
+var cur = st[start+1];
+st[start+1] = cur ? cur + " " + style : style;
+}
+}
+});
+}
+return st;
+}
+function getLineStyles(cm, line) {
+if (!line.styles || line.styles[0] != cm.state.modeGen)
+line.styles = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
+return line.styles;
+}
+// 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 == "" && mode.blankLine) mode.blankLine(state);
+while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
+mode.token(stream, state);
+stream.start = stream.pos;
+}
+}
+// 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, builder) {
+if (!style) return null;
+for (;;) {
+var lineClass = style.match(/(?:^|\s+)line-(background-)?(\S+)/);
+if (!lineClass) break;
+style = style.slice(0, lineClass.index) + style.slice(lineClass.index + lineClass[0].length);
+var prop = lineClass[1] ? "bgClass" : "textClass";
+if (builder[prop] == null)
+builder[prop] = lineClass[2];
+else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(builder[prop]))
+builder[prop] += " " + lineClass[2];
+}
+if (/^\s*$/.test(style)) return null;
+var cache = builder.cm.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 = 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 = {};
+// 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 = [];
+insertLineContent(line, builder, getLineStyles(cm, line));
+// 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)));
+// 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({});
+}
+}
+signal(cm, "renderLine", cm, lineView.line, builder.pre);
+return builder;
+}
+function defaultSpecialCharPlaceholder(ch) {
+var token = elt("span", "\u2022", "cm-invalidchar");
+token.title = "\\u" + ch.charCodeAt(0).toString(16);
+return token;
+}
+// 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) {
+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_upto8) 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_upto8) 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_upto8) content.appendChild(elt("span", [txt]));
+else content.appendChild(txt);
+builder.col += 1;
+}
+builder.map.push(builder.pos, builder.pos + 1, txt);
+builder.pos++;
+}
+}
+if (style || startStyle || endStyle || mustWrap) {
+var fullStyle = style || "";
+if (startStyle) fullStyle += startStyle;
+if (endStyle) fullStyle += endStyle;
+var token = elt("span", [content], fullStyle);
+if (title) token.title = title;
+return builder.content.appendChild(token);
+}
+builder.content.appendChild(content);
+}
+function buildTokenSplitSpaces(inner) {
+function split(old) {
+var out = " ";
+for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
+out += " ";
+return out;
+}
+return function(builder, text, style, startStyle, endStyle, title) {
+inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle, title);
+};
+}
+// 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;
+}
+};
+}
+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);
+}
+builder.pos += size;
+}
+// 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));
+return;
+}
+var len = allText.length, pos = 0, i = 1, text = "", style;
+var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
+for (;;) {
+if (nextChange == pos) { // Update current marker set
+spanStyle = spanEndStyle = spanStartStyle = title = "";
+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.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);
+}
+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);
+}
+}
+}
+// 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);
+}
+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 (isWholeLineUpdate(doc, change)) {
+// This is a whole-line replace. Treated specially to make
+// sure line objects move the way they are supposed to.
+for (var i = 0, added = []; i < text.length - 1; ++i)
+added.push(new Line(text[i], spansFor(i), estimateHeight));
+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 {
+for (var added = [], i = 1; i < text.length - 1; ++i)
+added.push(new Line(text[i], spansFor(i), estimateHeight));
+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);
+}
+} 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);
+for (var i = 1, added = []; i < text.length - 1; ++i)
+added.push(new Line(text[i], spansFor(i), estimateHeight));
+if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
+doc.insert(from.line + 1, added);
+}
+signalLater(doc, "change", doc, change);
+}
+// 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
+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;
+}
+this.height = height;
+}
+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);
+},
+// Helper used to collapse a small branch into a single leaf.
+collapse: function(lines) {
+lines.push.apply(lines, this.lines);
+},
+// 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;
+},
+// 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;
+}
+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;
+}
+// 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;
+}
+},
+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;
+}
+at -= sz;
+}
+},
+// 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();
+},
+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;
+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;
+if (typeof text == "string") text = splitLines(text);
+updateDoc(this, {from: start, to: start, text: text});
+setSelection(this, simpleSelection(start), sel_dontScroll);
+};
+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);
+},
+// 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); },
+// From here, the methods are part of the public interface. Most
+// are also available from CodeMirror (editor) instances.
+getValue: function(lineSep) {
+var lines = getLines(this, this.first, this.first + this.size);
+if (lineSep === false) return lines;
+return lines.join(lineSep || "\n");
+},
+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"}, 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);
+},
+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");
+},
+getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
+getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
+getLineNumber: function(line) {return lineNo(line);},
+getLineHandleVisualStart: function(line) {
+if (typeof line == "number") line = getLine(this, line);
+return visualLine(line);
+},
+lineCount: function() {return this.size;},
+firstLine: function() {return this.first;},
+lastLine: function() {return this.first + this.size - 1;},
+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;
+},
+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);
+}),
+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;
+}
+if (lineSep === false) return lines;
+else return lines.join(lineSep || "\n");
+},
+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: docMethodOp(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: 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);
+},
+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;},
+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);},
+markClean: function() {
+this.cleanGeneration = this.changeGeneration(true);
+},
+changeGeneration: function(forceSplit) {
+if (forceSplit)
+this.history.lastOp = 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);
+},
+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);
+}
+return markers;
+},
+findMarks: function(from, to) {
+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))
+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;
+},
+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;
+},
+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());
+}
+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);
+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}];
+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);
+break;
+}
+// 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;}
+});
+// Public alias.
+Doc.prototype.eachLine = Doc.prototype.iter;
+// 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]);
+eventMixin(Doc);
+// 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);
+}
+// 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);
+}
+// LINE UTILITIES
+// 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;
+}
+}
+return chunk.lines[n];
+}
+// 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); });
+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;
+}
+// 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;
+}
+// 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;
+}
+return n + i;
+}
+// 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 = 0; i < p.children.length; ++i) {
+var cur = p.children[i];
+if (cur == chunk) break;
+else h += cur.height;
+}
+}
+return h;
+}
+// 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;
+}
+// HISTORY
+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 = null;
+this.lastOrigin = this.lastSelOrigin = null;
+// Used by the isClean() method
+this.generation = this.maxGeneration = startGen || 1;
+}
+// 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;
+}
+// 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;
+}
+}
+// 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);
+}
+}
+// 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));
+}
+} 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 = opId;
+hist.lastOrigin = hist.lastSelOrigin = change.origin;
+if (!last) signal(doc, "historyAdded");
+}
+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);
+}
+// 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;
+// 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.lastOp ||
+(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);
+hist.lastSelTime = +new Date;
+hist.lastSelOrigin = origin;
+hist.lastOp = opId;
+if (options && options.clearRedo !== false)
+clearSelectionEvents(hist.undone);
+}
+function pushSelectionToHistory(sel, dest) {
+var top = lst(dest);
+if (!(top && top.ranges && top.equals(sel)))
+dest.push(sel);
+}
+// 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;
+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;
+}
+// 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;
+}
+// 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];
+}
+}
+}
+}
+return copy;
+}
+// Rebasing/resetting history to deal with externally-sourced changes
+function rebaseHistSelSingle(pos, from, to, diff) {
+if (to < pos.line) {
+pos.line += diff;
+} else if (from < pos.line) {
+pos.line = from;
+pos.ch = 0;
+}
+}
+// 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;
+}
+}
+}
+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);
+}
+// 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;
+}
+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;
+}
+if (mac && e.ctrlKey && b == 1) b = 3;
+return b;
+}
+// EVENT HANDLING
+// Lightweight event framework. on/off also work on DOM nodes,
+// registering native DOM handlers.
+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);
+}
+};
+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; }
+}
+};
+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);
+};
+// 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.
+var delayedCallbacks, delayedCallbackDepth = 0;
+function signalLater(emitter, type /*, values...*/) {
+var arr = emitter._handlers && emitter._handlers[type];
+if (!arr) return;
+var args = Array.prototype.slice.call(arguments, 2);
+if (!delayedCallbacks) {
+++delayedCallbackDepth;
+delayedCallbacks = [];
+setTimeout(fireDelayed, 0);
+}
+function bnd(f) {return function(){f.apply(null, args);};};
+for (var i = 0; i < arr.length; ++i)
+delayedCallbacks.push(bnd(arr[i]));
+}
+function fireDelayed() {
+--delayedCallbackDepth;
+var delayed = delayedCallbacks;
+delayedCallbacks = null;
+for (var i = 0; i < delayed.length; ++i) delayed[i]();
+}
+// 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) {
+signal(cm, override || e.type, cm, e);
+return e_defaultPrevented(e) || e.codemirrorIgnore;
+}
+function hasHandler(emitter, type) {
+var arr = emitter._handlers && emitter._handlers[type];
+return arr && arr.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);};
+}
+// MISC UTILITIES
+// Number of pixels added to scroller and sizer to hide scrollbar
+var scrollerCutOff = 30;
+// 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;
+}
+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;
+}
+};
+// 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;
+}
+}
+var spaceStrs = [""];
+function spaceStr(n) {
+while (spaceStrs.length <= n)
+spaceStrs.push(lst(spaceStrs) + " ");
+return spaceStrs[n];
+}
+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;
+}
+if ([].indexOf) indexOf = function(array, elt) { return array.indexOf(elt); };
+function map(array, f) {
+var out = [];
+for (var i = 0; i < array.length; i++) out[i] = f(array[i], i);
+return out;
+}
+if ([].map) map = function(array, f) { return array.map(f); };
+function createObj(base, props) {
+var inst;
+if (Object.create) {
+inst = Object.create(base);
+} else {
+var ctor = function() {};
+ctor.prototype = base;
+inst = new ctor();
+}
+if (props) copyObj(props, inst);
+return inst;
+};
+function copyObj(obj, target) {
+if (!target) target = {};
+for (var prop in obj) if (obj.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 nonASCIISingleCaseWordChar = /[\u00df\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
+var isWordChar = CodeMirror.isWordChar = function(ch) {
+return /\w/.test(ch) || ch > "\x80" &&
+(ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
+};
+function isEmpty(obj) {
+for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
+return true;
+}
+// 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); }
+// DOM UTILITIES
+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;
+}
+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();
+r.moveToElementText(node.parentNode);
+r.collapse(true);
+r.moveEnd("character", end);
+r.moveStart("character", start);
+return r;
+};
+function removeChildren(e) {
+for (var count = e.childNodes.length; count > 0; --count)
+e.removeChild(e.firstChild);
+return e;
+}
+function removeChildrenAndAdd(parent, e) {
+return removeChildren(parent).appendChild(e);
+}
+function contains(parent, child) {
+if (parent.contains)
+return parent.contains(child);
+while (child = child.parentNode)
+if (child == parent) return true;
+}
+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_upto10) activeElt = function() {
+try { return document.activeElement; }
+catch(e) { return document.body; }
+};
+// FEATURE DETECTION
+// 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_upto8) return false;
+var div = elt('div');
+return "draggable" in div || "dragDrop" in div;
+}();
+var knownScrollbarWidth;
+function scrollbarWidth(measure) {
+if (knownScrollbarWidth != null) return knownScrollbarWidth;
+var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll");
+removeChildrenAndAdd(measure, test);
+if (test.offsetWidth)
+knownScrollbarWidth = test.offsetHeight - test.clientHeight;
+return knownScrollbarWidth || 0;
+}
+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_upto7;
+}
+if (zwspSupported) return elt("span", "\u200b");
+else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
+}
+// 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.left == r0.right) return false;
+var r1 = range(txt, 1, 2).getBoundingClientRect();
+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 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/);};
+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;
+};
+var hasCopyEvent = (function() {
+var e = elt("div");
+if ("oncopy" in e) return true;
+e.setAttribute("oncopy", "return;");
+return typeof e.oncopy == "function";
+})();
+// KEY NAMES
+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: "[", 220: "\\",
+221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
+63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"};
+CodeMirror.keyNames = keyNames;
+(function() {
+// Number keys
+for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
+// Alphabetic keys
+for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
+// Function keys
+for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
+})();
+// BIDI HELPERS
+function iterateBidiSections(order, from, to, f) {
+if (!order) return f(from, to, "ltr");
+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");
+found = true;
+}
+}
+if (!found) f(from, to, "ltr");
+}
+function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
+function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
+function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
+function lineRight(line) {
+var order = getOrder(line);
+if (!order) return line.text.length;
+return bidiRight(lst(order));
+}
+function lineStart(cm, lineN) {
+var line = getLine(cm.doc, lineN);
+var visual = visualLine(line);
+if (visual != line) lineN = lineNo(visual);
+var order = getOrder(visual);
+var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
+return Pos(lineN, ch);
+}
+function lineEnd(cm, lineN) {
+var merged, line = getLine(cm.doc, lineN);
+while (merged = collapsedSpanAtEnd(line)) {
+line = merged.find(1, true).line;
+lineN = null;
+}
+var order = getOrder(line);
+var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
+return Pos(lineN == null ? lineNo(line) : lineN, ch);
+}
+function compareBidiLevel(order, a, b) {
+var linedir = order[0].level;
+if (a == linedir) return true;
+if (b == linedir) return false;
+return a < b;
+}
+var bidiOther;
+function getBidiPartAt(order, pos) {
+bidiOther = null;
+for (var i = 0, found; i < order.length; ++i) {
+var cur = order[i];
+if (cur.from < pos && cur.to > pos) return i;
+if ((cur.from == pos || cur.to == pos)) {
+if (found == null) {
+found = i;
+} else if (compareBidiLevel(order, cur.level, order[found].level)) {
+if (cur.from != cur.to) bidiOther = found;
+return i;
+} else {
+if (cur.from != cur.to) bidiOther = i;
+return found;
+}
+}
+}
+return found;
+}
+function moveInLine(line, pos, dir, byUnit) {
+if (!byUnit) return pos + dir;
+do pos += dir;
+while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
+return pos;
+}
+// This is needed in order to move 'visually' through bi-directional
+// text -- i.e., pressing left should make the cursor go left, even
+// when in RTL text. The tricky part is the 'jumps', where RTL and
+// LTR text touch each other. This often requires the cursor offset
+// to move more than one unit, in order to visually move one unit.
+function moveVisually(line, start, dir, byUnit) {
+var bidi = getOrder(line);
+if (!bidi) return moveLogically(line, start, dir, byUnit);
+var pos = getBidiPartAt(bidi, start), part = bidi[pos];
+var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
+for (;;) {
+if (target > part.from && target < part.to) return target;
+if (target == part.from || target == part.to) {
+if (getBidiPartAt(bidi, target) == pos) return target;
+part = bidi[pos += dir];
+return (dir > 0) == part.level % 2 ? part.to : part.from;
+} else {
+part = bidi[pos += dir];
+if (!part) return null;
+if ((dir > 0) == part.level % 2)
+target = moveInLine(line, part.to, -1, byUnit);
+else
+target = moveInLine(line, part.from, 1, byUnit);
+}
+}
+}
+function moveLogically(line, start, dir, byUnit) {
+var target = start + dir;
+if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
+return target < 0 || target > line.text.length ? null : target;
+}
+// Bidirectional ordering algorithm
+// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
+// that this (partially) implements.
+// 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
+// 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 0x6ff
+var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmm";
+function charType(code) {
+if (code <= 0xf7) return lowTypes.charAt(code);
+else if (0x590 <= code && code <= 0x5f4) return "R";
+else if (0x600 <= code && code <= 0x6ed) 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";
+}
+var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
+var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
+// Browsers seem to always treat the boundaries of block elements as being L.
+var outerType = "L";
+function BidiSpan(level, from, to) {
+this.level = level;
+this.from = from; this.to = to;
+}
+return function(str) {
+if (!bidiRE.test(str)) return false;
+var len = str.length, types = [];
+for (var i = 0, type; i < len; ++i)
+types.push(type = 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 = 0, prev = outerType; i < len; ++i) {
+var type = types[i];
+if (type == "m") types[i] = prev;
+else prev = type;
+}
+// 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 = 0, cur = outerType; i < len; ++i) {
+var type = types[i];
+if (type == "1" && cur == "r") types[i] = "n";
+else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
+}
+// 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 = 1, prev = types[0]; i < len - 1; ++i) {
+var type = types[i];
+if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
+else if (type == "," && prev == types[i+1] &&
+(prev == "1" || prev == "n")) types[i] = prev;
+prev = type;
+}
+// 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 = 0; i < len; ++i) {
+var type = types[i];
+if (type == ",") types[i] = "N";
+else if (type == "%") {
+for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
+var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
+for (var j = i; j < end; ++j) types[j] = replace;
+i = end - 1;
+}
+}
+// 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 = 0, cur = outerType; i < len; ++i) {
+var type = types[i];
+if (cur == "L" && type == "1") types[i] = "L";
+else if (isStrong.test(type)) cur = type;
+}
+// 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 = 0; i < len; ++i) {
+if (isNeutral.test(types[i])) {
+for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
+var before = (i ? types[i-1] : outerType) == "L";
+var after = (end < len ? types[end] : outerType) == "L";
+var replace = before || after ? "L" : "R";
+for (var j = i; j < end; ++j) types[j] = replace;
+i = end - 1;
+}
+}
+// 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 = 0; i < len;) {
+if (countsAsLeft.test(types[i])) {
+var start = i;
+for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
+order.push(new BidiSpan(0, start, i));
+} else {
+var pos = i, at = order.length;
+for (++i; i < len && types[i] != "L"; ++i) {}
+for (var j = pos; j < i;) {
+if (countsAsNum.test(types[j])) {
+if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j));
+var nstart = j;
+for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
+order.splice(at, 0, new BidiSpan(2, nstart, j));
+pos = j;
+} else ++j;
+}
+if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i));
+}
+}
+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));
+}
+if (order[0].level != lst(order).level)
+order.push(new BidiSpan(order[0].level, len, len));
+return order;
+};
+})();
+// THE END
+CodeMirror.version = "4.0.3";
+return CodeMirror;
+});