1 // CodeMirror version 3.15
3 // CodeMirror is the only global var we claim
4 window.CodeMirror = (function() {
9 // Crude, but necessary to handle a number of hard-to-feature-detect
10 // bugs and behavior differences.
11 var gecko = /gecko\/\d/i.test(navigator.userAgent);
12 var ie = /MSIE \d/.test(navigator.userAgent);
13 var ie_lt8 = ie && (document.documentMode == null || document.documentMode < 8);
14 var ie_lt9 = ie && (document.documentMode == null || document.documentMode < 9);
15 var webkit = /WebKit\//.test(navigator.userAgent);
16 var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
17 var chrome = /Chrome\//.test(navigator.userAgent);
18 var opera = /Opera\//.test(navigator.userAgent);
19 var safari = /Apple Computer/.test(navigator.vendor);
20 var khtml = /KHTML\//.test(navigator.userAgent);
21 var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent);
22 var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
23 var phantom = /PhantomJS/.test(navigator.userAgent);
25 var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
26 // This is woefully incomplete. Suggestions for alternative methods welcome.
27 var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent);
28 var mac = ios || /Mac/.test(navigator.platform);
29 var windows = /windows/i.test(navigator.platform);
31 var opera_version = opera && navigator.userAgent.match(/Version\/(\d*\.\d*)/);
32 if (opera_version) opera_version = Number(opera_version[1]);
33 if (opera_version && opera_version >= 15) { opera = false; webkit = true; }
34 // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
35 var flipCtrlCmd = mac && (qtwebkit || opera && (opera_version == null || opera_version < 12.11));
36 var captureMiddleClick = gecko || (ie && !ie_lt9);
38 // Optimize some code when these features are not used
39 var sawReadOnlySpans = false, sawCollapsedSpans = false;
43 function CodeMirror(place, options) {
44 if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
46 this.options = options = options || {};
47 // Determine effective options based on given values and defaults.
48 for (var opt in defaults) if (!options.hasOwnProperty(opt) && defaults.hasOwnProperty(opt))
49 options[opt] = defaults[opt];
50 setGuttersForLineNumbers(options);
52 var docStart = typeof options.value == "string" ? 0 : options.value.first;
53 var display = this.display = makeDisplay(place, docStart);
54 display.wrapper.CodeMirror = this;
56 if (options.autofocus && !mobile) focusInput(this);
58 this.state = {keyMaps: [],
61 overwrite: false, focused: false,
62 suppressEdits: false, pasteIncoming: false,
64 highlight: new Delayed()};
67 if (options.lineWrapping)
68 this.display.wrapper.className += " CodeMirror-wrap";
70 var doc = options.value;
71 if (typeof doc == "string") doc = new Doc(options.value, options.mode);
72 operation(this, attachDoc)(this, doc);
74 // Override magic textarea content restore that IE sometimes does
75 // on our hidden textarea on reload
76 if (ie) setTimeout(bind(resetInput, this, true), 20);
78 registerEventHandlers(this);
79 // IE throws unspecified error in certain cases, when
80 // trying to access activeElement before onload
81 var hasFocus; try { hasFocus = (document.activeElement == display.input); } catch(e) { }
82 if (hasFocus || (options.autofocus && !mobile)) setTimeout(bind(onFocus, this), 20);
85 operation(this, function() {
86 for (var opt in optionHandlers)
87 if (optionHandlers.propertyIsEnumerable(opt))
88 optionHandlers[opt](this, options[opt], Init);
89 for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
93 // DISPLAY CONSTRUCTOR
95 function makeDisplay(place, docStart) {
98 var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none; font-size: 4px;");
99 if (webkit) input.style.width = "1000px";
100 else input.setAttribute("wrap", "off");
101 // if border: 0; -- iOS fails to open keyboard (issue #1287)
102 if (ios) input.style.border = "1px solid black";
103 input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off"); input.setAttribute("spellcheck", "false");
105 // Wraps and hides input textarea
106 d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
107 // The actual fake scrollbars.
108 d.scrollbarH = elt("div", [elt("div", null, null, "height: 1px")], "CodeMirror-hscrollbar");
109 d.scrollbarV = elt("div", [elt("div", null, null, "width: 1px")], "CodeMirror-vscrollbar");
110 d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
111 d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
112 // DIVs containing the selection and the actual code
113 d.lineDiv = elt("div", null, "CodeMirror-code");
114 d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
115 // Blinky cursor, and element used to ensure cursor fits at the end of a line
116 d.cursor = elt("div", "\u00a0", "CodeMirror-cursor");
117 // Secondary cursor, shown when on a 'jump' in bi-directional text
118 d.otherCursor = elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor");
119 // Used to measure text size
120 d.measure = elt("div", null, "CodeMirror-measure");
121 // Wraps everything that needs to exist inside the vertically-padded coordinate system
122 d.lineSpace = elt("div", [d.measure, d.selectionDiv, d.lineDiv, d.cursor, d.otherCursor],
123 null, "position: relative; outline: none");
124 // Moved around its parent to cover visible view
125 d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
126 // Set to the height of the text, causes scrolling
127 d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
128 // D is needed because behavior of elts with overflow: auto and padding is inconsistent across browsers
129 d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerCutOff + "px; width: 1px;");
130 // Will contain the gutters, if any
131 d.gutters = elt("div", null, "CodeMirror-gutters");
133 // Provides scrolling
134 d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
135 d.scroller.setAttribute("tabIndex", "-1");
136 // The element in which the editor lives.
137 d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV,
138 d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
139 // Work around IE7 z-index bug
140 if (ie_lt8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
141 if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper);
143 // Needed to hide big blue blinking cursor on Mobile Safari
144 if (ios) input.style.width = "0px";
145 if (!webkit) d.scroller.draggable = true;
146 // Needed to handle Tab key in KHTML
147 if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; }
148 // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
149 else if (ie_lt8) d.scrollbarH.style.minWidth = d.scrollbarV.style.minWidth = "18px";
151 // Current visible range (may be bigger than the view window).
152 d.viewOffset = d.lastSizeC = 0;
153 d.showingFrom = d.showingTo = docStart;
155 // Used to only resize the line number gutter when necessary (when
156 // the amount of lines crosses a boundary that makes its width change)
157 d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
158 // See readInput and resetInput
160 // Set to true when a non-horizontal-scrolling widget is added. As
161 // an optimization, widget aligning is skipped when d is false.
162 d.alignWidgets = false;
163 // Flag that indicates whether we currently expect input to appear
164 // (after some event like 'keypress' or 'input') and are polling
166 d.pollingFast = false;
167 // Self-resetting timeout for the poller
168 d.poll = new Delayed();
170 d.cachedCharWidth = d.cachedTextHeight = null;
171 d.measureLineCache = [];
172 d.measureLineCachePos = 0;
174 // Tracks when resetInput has punted to just putting a short
175 // string instead of the (large) selection.
176 d.inaccurateSelection = false;
178 // Tracks the maximum line length so that the horizontal scrollbar
179 // can be kept static when scrolling.
182 d.maxLineChanged = false;
184 // Used for measuring wheel scrolling granularity
185 d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
192 // Used to get the editor into a consistent state again when options change.
194 function loadMode(cm) {
195 cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
196 cm.doc.iter(function(line) {
197 if (line.stateAfter) line.stateAfter = null;
198 if (line.styles) line.styles = null;
200 cm.doc.frontier = cm.doc.first;
201 startWorker(cm, 100);
203 if (cm.curOp) regChange(cm);
206 function wrappingChanged(cm) {
207 if (cm.options.lineWrapping) {
208 cm.display.wrapper.className += " CodeMirror-wrap";
209 cm.display.sizer.style.minWidth = "";
211 cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", "");
212 computeMaxLength(cm);
214 estimateLineHeights(cm);
217 setTimeout(function(){updateScrollbars(cm);}, 100);
220 function estimateHeight(cm) {
221 var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
222 var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
223 return function(line) {
224 if (lineIsHidden(cm.doc, line))
227 return (Math.ceil(line.text.length / perLine) || 1) * th;
233 function estimateLineHeights(cm) {
234 var doc = cm.doc, est = estimateHeight(cm);
235 doc.iter(function(line) {
236 var estHeight = est(line);
237 if (estHeight != line.height) updateLineHeight(line, estHeight);
241 function keyMapChanged(cm) {
242 var map = keyMap[cm.options.keyMap], style = map.style;
243 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") +
244 (style ? " cm-keymap-" + style : "");
245 cm.state.disableInput = map.disableInput;
248 function themeChanged(cm) {
249 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
250 cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
254 function guttersChanged(cm) {
257 setTimeout(function(){alignHorizontally(cm);}, 20);
260 function updateGutters(cm) {
261 var gutters = cm.display.gutters, specs = cm.options.gutters;
262 removeChildren(gutters);
263 for (var i = 0; i < specs.length; ++i) {
264 var gutterClass = specs[i];
265 var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
266 if (gutterClass == "CodeMirror-linenumbers") {
267 cm.display.lineGutter = gElt;
268 gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
271 gutters.style.display = i ? "" : "none";
274 function lineLength(doc, line) {
275 if (line.height == 0) return 0;
276 var len = line.text.length, merged, cur = line;
277 while (merged = collapsedSpanAtStart(cur)) {
278 var found = merged.find();
279 cur = getLine(doc, found.from.line);
280 len += found.from.ch - found.to.ch;
283 while (merged = collapsedSpanAtEnd(cur)) {
284 var found = merged.find();
285 len -= cur.text.length - found.from.ch;
286 cur = getLine(doc, found.to.line);
287 len += cur.text.length - found.to.ch;
292 function computeMaxLength(cm) {
293 var d = cm.display, doc = cm.doc;
294 d.maxLine = getLine(doc, doc.first);
295 d.maxLineLength = lineLength(doc, d.maxLine);
296 d.maxLineChanged = true;
297 doc.iter(function(line) {
298 var len = lineLength(doc, line);
299 if (len > d.maxLineLength) {
300 d.maxLineLength = len;
306 // Make sure the gutters options contains the element
307 // "CodeMirror-linenumbers" when the lineNumbers option is true.
308 function setGuttersForLineNumbers(options) {
310 for (var i = 0; i < options.gutters.length; ++i) {
311 if (options.gutters[i] == "CodeMirror-linenumbers") {
312 if (options.lineNumbers) found = true;
313 else options.gutters.splice(i--, 1);
316 if (!found && options.lineNumbers)
317 options.gutters.push("CodeMirror-linenumbers");
322 // Re-synchronize the fake scrollbars with the actual size of the
323 // content. Optionally force a scrollTop.
324 function updateScrollbars(cm) {
325 var d = cm.display, docHeight = cm.doc.height;
326 var totalHeight = docHeight + paddingVert(d);
327 d.sizer.style.minHeight = d.heightForcer.style.top = totalHeight + "px";
328 d.gutters.style.height = Math.max(totalHeight, d.scroller.clientHeight - scrollerCutOff) + "px";
329 var scrollHeight = Math.max(totalHeight, d.scroller.scrollHeight);
330 var needsH = d.scroller.scrollWidth > (d.scroller.clientWidth + 1);
331 var needsV = scrollHeight > (d.scroller.clientHeight + 1);
333 d.scrollbarV.style.display = "block";
334 d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0";
335 d.scrollbarV.firstChild.style.height =
336 (scrollHeight - d.scroller.clientHeight + d.scrollbarV.clientHeight) + "px";
337 } else d.scrollbarV.style.display = "";
339 d.scrollbarH.style.display = "block";
340 d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0";
341 d.scrollbarH.firstChild.style.width =
342 (d.scroller.scrollWidth - d.scroller.clientWidth + d.scrollbarH.clientWidth) + "px";
343 } else d.scrollbarH.style.display = "";
344 if (needsH && needsV) {
345 d.scrollbarFiller.style.display = "block";
346 d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px";
347 } else d.scrollbarFiller.style.display = "";
348 if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
349 d.gutterFiller.style.display = "block";
350 d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px";
351 d.gutterFiller.style.width = d.gutters.offsetWidth + "px";
352 } else d.gutterFiller.style.display = "";
354 if (mac_geLion && scrollbarWidth(d.measure) === 0)
355 d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px";
358 function visibleLines(display, doc, viewPort) {
359 var top = display.scroller.scrollTop, height = display.wrapper.clientHeight;
360 if (typeof viewPort == "number") top = viewPort;
361 else if (viewPort) {top = viewPort.top; height = viewPort.bottom - viewPort.top;}
362 top = Math.floor(top - paddingTop(display));
363 var bottom = Math.ceil(top + height);
364 return {from: lineAtHeight(doc, top), to: lineAtHeight(doc, bottom)};
369 function alignHorizontally(cm) {
370 var display = cm.display;
371 if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
372 var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
373 var gutterW = display.gutters.offsetWidth, l = comp + "px";
374 for (var n = display.lineDiv.firstChild; n; n = n.nextSibling) if (n.alignable) {
375 for (var i = 0, a = n.alignable; i < a.length; ++i) a[i].style.left = l;
377 if (cm.options.fixedGutter)
378 display.gutters.style.left = (comp + gutterW) + "px";
381 function maybeUpdateLineNumberWidth(cm) {
382 if (!cm.options.lineNumbers) return false;
383 var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
384 if (last.length != display.lineNumChars) {
385 var test = display.measure.appendChild(elt("div", [elt("div", last)],
386 "CodeMirror-linenumber CodeMirror-gutter-elt"));
387 var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
388 display.lineGutter.style.width = "";
389 display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding);
390 display.lineNumWidth = display.lineNumInnerWidth + padding;
391 display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
392 display.lineGutter.style.width = display.lineNumWidth + "px";
398 function lineNumberFor(options, i) {
399 return String(options.lineNumberFormatter(i + options.firstLineNumber));
401 function compensateForHScroll(display) {
402 return getRect(display.scroller).left - getRect(display.sizer).left;
407 function updateDisplay(cm, changes, viewPort, forced) {
408 var oldFrom = cm.display.showingFrom, oldTo = cm.display.showingTo, updated;
409 var visible = visibleLines(cm.display, cm.doc, viewPort);
411 if (!updateDisplayInner(cm, changes, visible, forced)) break;
415 updateScrollbars(cm);
417 // Clip forced viewport to actual scrollable area
419 viewPort = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight,
420 typeof viewPort == "number" ? viewPort : viewPort.top);
421 visible = visibleLines(cm.display, cm.doc, viewPort);
422 if (visible.from >= cm.display.showingFrom && visible.to <= cm.display.showingTo)
428 signalLater(cm, "update", cm);
429 if (cm.display.showingFrom != oldFrom || cm.display.showingTo != oldTo)
430 signalLater(cm, "viewportChange", cm, cm.display.showingFrom, cm.display.showingTo);
435 // Uses a set of changes plus the current scroll position to
436 // determine which DOM updates have to be made, and makes the
438 function updateDisplayInner(cm, changes, visible, forced) {
439 var display = cm.display, doc = cm.doc;
440 if (!display.wrapper.clientWidth) {
441 display.showingFrom = display.showingTo = doc.first;
442 display.viewOffset = 0;
446 // Bail out if the visible area is already rendered and nothing changed.
447 if (!forced && changes.length == 0 &&
448 visible.from > display.showingFrom && visible.to < display.showingTo)
451 if (maybeUpdateLineNumberWidth(cm))
452 changes = [{from: doc.first, to: doc.first + doc.size}];
453 var gutterW = display.sizer.style.marginLeft = display.gutters.offsetWidth + "px";
454 display.scrollbarH.style.left = cm.options.fixedGutter ? gutterW : "0";
456 // Used to determine which lines need their line numbers updated
457 var positionsChangedFrom = Infinity;
458 if (cm.options.lineNumbers)
459 for (var i = 0; i < changes.length; ++i)
460 if (changes[i].diff) { positionsChangedFrom = changes[i].from; break; }
462 var end = doc.first + doc.size;
463 var from = Math.max(visible.from - cm.options.viewportMargin, doc.first);
464 var to = Math.min(end, visible.to + cm.options.viewportMargin);
465 if (display.showingFrom < from && from - display.showingFrom < 20) from = Math.max(doc.first, display.showingFrom);
466 if (display.showingTo > to && display.showingTo - to < 20) to = Math.min(end, display.showingTo);
467 if (sawCollapsedSpans) {
468 from = lineNo(visualLine(doc, getLine(doc, from)));
469 while (to < end && lineIsHidden(doc, getLine(doc, to))) ++to;
472 // Create a range of theoretically intact lines, and punch holes
473 // in that using the change info.
474 var intact = [{from: Math.max(display.showingFrom, doc.first),
475 to: Math.min(display.showingTo, end)}];
476 if (intact[0].from >= intact[0].to) intact = [];
477 else intact = computeIntact(intact, changes);
478 // When merged lines are present, we might have to reduce the
479 // intact ranges because changes in continued fragments of the
480 // intact lines do require the lines to be redrawn.
481 if (sawCollapsedSpans)
482 for (var i = 0; i < intact.length; ++i) {
483 var range = intact[i], merged;
484 while (merged = collapsedSpanAtEnd(getLine(doc, range.to - 1))) {
485 var newTo = merged.find().from.line;
486 if (newTo > range.from) range.to = newTo;
487 else { intact.splice(i--, 1); break; }
491 // Clip off the parts that won't be visible
493 for (var i = 0; i < intact.length; ++i) {
494 var range = intact[i];
495 if (range.from < from) range.from = from;
496 if (range.to > to) range.to = to;
497 if (range.from >= range.to) intact.splice(i--, 1);
498 else intactLines += range.to - range.from;
500 if (!forced && intactLines == to - from && from == display.showingFrom && to == display.showingTo) {
501 updateViewOffset(cm);
504 intact.sort(function(a, b) {return a.from - b.from;});
506 // Avoid crashing on IE's "unspecified error" when in iframes
508 var focused = document.activeElement;
510 if (intactLines < (to - from) * .7) display.lineDiv.style.display = "none";
511 patchDisplay(cm, from, to, intact, positionsChangedFrom);
512 display.lineDiv.style.display = "";
513 if (focused && document.activeElement != focused && focused.offsetHeight) focused.focus();
515 var different = from != display.showingFrom || to != display.showingTo ||
516 display.lastSizeC != display.wrapper.clientHeight;
517 // This is just a bogus formula that detects when the editor is
518 // resized or the font size changes.
520 display.lastSizeC = display.wrapper.clientHeight;
521 startWorker(cm, 400);
523 display.showingFrom = from; display.showingTo = to;
525 updateHeightsInViewport(cm);
526 updateViewOffset(cm);
531 function updateHeightsInViewport(cm) {
532 var display = cm.display;
533 var prevBottom = display.lineDiv.offsetTop;
534 for (var node = display.lineDiv.firstChild, height; node; node = node.nextSibling) if (node.lineObj) {
536 var bot = node.offsetTop + node.offsetHeight;
537 height = bot - prevBottom;
540 var box = getRect(node);
541 height = box.bottom - box.top;
543 var diff = node.lineObj.height - height;
544 if (height < 2) height = textHeight(display);
545 if (diff > .001 || diff < -.001) {
546 updateLineHeight(node.lineObj, height);
547 var widgets = node.lineObj.widgets;
548 if (widgets) for (var i = 0; i < widgets.length; ++i)
549 widgets[i].height = widgets[i].node.offsetHeight;
554 function updateViewOffset(cm) {
555 var off = cm.display.viewOffset = heightAtLine(cm, getLine(cm.doc, cm.display.showingFrom));
556 // Position the mover div to align with the current virtual scroll position
557 cm.display.mover.style.top = off + "px";
560 function computeIntact(intact, changes) {
561 for (var i = 0, l = changes.length || 0; i < l; ++i) {
562 var change = changes[i], intact2 = [], diff = change.diff || 0;
563 for (var j = 0, l2 = intact.length; j < l2; ++j) {
564 var range = intact[j];
565 if (change.to <= range.from && change.diff) {
566 intact2.push({from: range.from + diff, to: range.to + diff});
567 } else if (change.to <= range.from || change.from >= range.to) {
570 if (change.from > range.from)
571 intact2.push({from: range.from, to: change.from});
572 if (change.to < range.to)
573 intact2.push({from: change.to + diff, to: range.to + diff});
581 function getDimensions(cm) {
582 var d = cm.display, left = {}, width = {};
583 for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
584 left[cm.options.gutters[i]] = n.offsetLeft;
585 width[cm.options.gutters[i]] = n.offsetWidth;
587 return {fixedPos: compensateForHScroll(d),
588 gutterTotalWidth: d.gutters.offsetWidth,
591 wrapperWidth: d.wrapper.clientWidth};
594 function patchDisplay(cm, from, to, intact, updateNumbersFrom) {
595 var dims = getDimensions(cm);
596 var display = cm.display, lineNumbers = cm.options.lineNumbers;
597 if (!intact.length && (!webkit || !cm.display.currentWheelTarget))
598 removeChildren(display.lineDiv);
599 var container = display.lineDiv, cur = container.firstChild;
602 var next = node.nextSibling;
603 if (webkit && mac && cm.display.currentWheelTarget == node) {
604 node.style.display = "none";
607 node.parentNode.removeChild(node);
612 var nextIntact = intact.shift(), lineN = from;
613 cm.doc.iter(from, to, function(line) {
614 if (nextIntact && nextIntact.to == lineN) nextIntact = intact.shift();
615 if (lineIsHidden(cm.doc, line)) {
616 if (line.height != 0) updateLineHeight(line, 0);
617 if (line.widgets && cur.previousSibling) for (var i = 0; i < line.widgets.length; ++i) {
618 var w = line.widgets[i];
619 if (w.showIfHidden) {
620 var prev = cur.previousSibling;
621 if (/pre/i.test(prev.nodeName)) {
622 var wrap = elt("div", null, null, "position: relative");
623 prev.parentNode.replaceChild(wrap, prev);
624 wrap.appendChild(prev);
627 var wnode = prev.appendChild(elt("div", [w.node], "CodeMirror-linewidget"));
628 if (!w.handleMouseEvents) wnode.ignoreEvents = true;
629 positionLineWidget(w, wnode, prev, dims);
632 } else if (nextIntact && nextIntact.from <= lineN && nextIntact.to > lineN) {
633 // This line is intact. Skip to the actual node. Update its
634 // line number if needed.
635 while (cur.lineObj != line) cur = rm(cur);
636 if (lineNumbers && updateNumbersFrom <= lineN && cur.lineNumber)
637 setTextContent(cur.lineNumber, lineNumberFor(cm.options, lineN));
638 cur = cur.nextSibling;
640 // For lines with widgets, make an attempt to find and reuse
641 // the existing element, so that widgets aren't needlessly
642 // removed and re-inserted into the dom
643 if (line.widgets) for (var j = 0, search = cur, reuse; search && j < 20; ++j, search = search.nextSibling)
644 if (search.lineObj == line && /div/i.test(search.nodeName)) { reuse = search; break; }
645 // This line needs to be generated.
646 var lineNode = buildLineElement(cm, line, lineN, dims, reuse);
647 if (lineNode != reuse) {
648 container.insertBefore(lineNode, cur);
650 while (cur != reuse) cur = rm(cur);
651 cur = cur.nextSibling;
654 lineNode.lineObj = line;
658 while (cur) cur = rm(cur);
661 function buildLineElement(cm, line, lineNo, dims, reuse) {
662 var lineElement = lineContent(cm, line);
663 var markers = line.gutterMarkers, display = cm.display, wrap;
665 if (!cm.options.lineNumbers && !markers && !line.bgClass && !line.wrapClass && !line.widgets)
668 // Lines with gutter elements, widgets or a background class need
669 // to be wrapped again, and have the extra elements added to the
673 reuse.alignable = null;
674 var isOk = true, widgetsSeen = 0, insertBefore = null;
675 for (var n = reuse.firstChild, next; n; n = next) {
676 next = n.nextSibling;
677 if (!/\bCodeMirror-linewidget\b/.test(n.className)) {
678 reuse.removeChild(n);
680 for (var i = 0; i < line.widgets.length; ++i) {
681 var widget = line.widgets[i];
682 if (widget.node == n.firstChild) {
683 if (!widget.above && !insertBefore) insertBefore = n;
684 positionLineWidget(widget, n, reuse, dims);
689 if (i == line.widgets.length) { isOk = false; break; }
692 reuse.insertBefore(lineElement, insertBefore);
693 if (isOk && widgetsSeen == line.widgets.length) {
695 reuse.className = line.wrapClass || "";
699 wrap = elt("div", null, line.wrapClass, "position: relative");
700 wrap.appendChild(lineElement);
702 // Kludge to make sure the styled element lies behind the selection (by z-index)
704 wrap.insertBefore(elt("div", null, line.bgClass + " CodeMirror-linebackground"), wrap.firstChild);
705 if (cm.options.lineNumbers || markers) {
706 var gutterWrap = wrap.insertBefore(elt("div", null, null, "position: absolute; left: " +
707 (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"),
709 if (cm.options.fixedGutter) (wrap.alignable || (wrap.alignable = [])).push(gutterWrap);
710 if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
711 wrap.lineNumber = gutterWrap.appendChild(
712 elt("div", lineNumberFor(cm.options, lineNo),
713 "CodeMirror-linenumber CodeMirror-gutter-elt",
714 "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
715 + display.lineNumInnerWidth + "px"));
717 for (var k = 0; k < cm.options.gutters.length; ++k) {
718 var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
720 gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
721 dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
724 if (ie_lt8) wrap.style.zIndex = 2;
725 if (line.widgets && wrap != reuse) for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
726 var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
727 if (!widget.handleMouseEvents) node.ignoreEvents = true;
728 positionLineWidget(widget, node, wrap, dims);
730 wrap.insertBefore(node, cm.options.lineNumbers && line.height != 0 ? gutterWrap : lineElement);
732 wrap.appendChild(node);
733 signalLater(widget, "redraw");
738 function positionLineWidget(widget, node, wrap, dims) {
739 if (widget.noHScroll) {
740 (wrap.alignable || (wrap.alignable = [])).push(node);
741 var width = dims.wrapperWidth;
742 node.style.left = dims.fixedPos + "px";
743 if (!widget.coverGutter) {
744 width -= dims.gutterTotalWidth;
745 node.style.paddingLeft = dims.gutterTotalWidth + "px";
747 node.style.width = width + "px";
749 if (widget.coverGutter) {
750 node.style.zIndex = 5;
751 node.style.position = "relative";
752 if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
756 // SELECTION / CURSOR
758 function updateSelection(cm) {
759 var display = cm.display;
760 var collapsed = posEq(cm.doc.sel.from, cm.doc.sel.to);
761 if (collapsed || cm.options.showCursorWhenSelecting)
762 updateSelectionCursor(cm);
764 display.cursor.style.display = display.otherCursor.style.display = "none";
766 updateSelectionRange(cm);
768 display.selectionDiv.style.display = "none";
770 // Move the hidden textarea near the cursor to prevent scrolling artifacts
771 if (cm.options.moveInputWithCursor) {
772 var headPos = cursorCoords(cm, cm.doc.sel.head, "div");
773 var wrapOff = getRect(display.wrapper), lineOff = getRect(display.lineDiv);
774 display.inputDiv.style.top = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
775 headPos.top + lineOff.top - wrapOff.top)) + "px";
776 display.inputDiv.style.left = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
777 headPos.left + lineOff.left - wrapOff.left)) + "px";
781 // No selection, plain cursor
782 function updateSelectionCursor(cm) {
783 var display = cm.display, pos = cursorCoords(cm, cm.doc.sel.head, "div");
784 display.cursor.style.left = pos.left + "px";
785 display.cursor.style.top = pos.top + "px";
786 display.cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
787 display.cursor.style.display = "";
790 display.otherCursor.style.display = "";
791 display.otherCursor.style.left = pos.other.left + "px";
792 display.otherCursor.style.top = pos.other.top + "px";
793 display.otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
794 } else { display.otherCursor.style.display = "none"; }
797 // Highlight selection
798 function updateSelectionRange(cm) {
799 var display = cm.display, doc = cm.doc, sel = cm.doc.sel;
800 var fragment = document.createDocumentFragment();
801 var clientWidth = display.lineSpace.offsetWidth, pl = paddingLeft(cm.display);
803 function add(left, top, width, bottom) {
804 if (top < 0) top = 0;
805 fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
806 "px; top: " + top + "px; width: " + (width == null ? clientWidth - left : width) +
807 "px; height: " + (bottom - top) + "px"));
810 function drawForLine(line, fromArg, toArg) {
811 var lineObj = getLine(doc, line);
812 var lineLen = lineObj.text.length;
814 function coords(ch, bias) {
815 return charCoords(cm, Pos(line, ch), "div", lineObj, bias);
818 iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
819 var leftPos = coords(from, "left"), rightPos, left, right;
822 left = right = leftPos.left;
824 rightPos = coords(to - 1, "right");
825 if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
827 right = rightPos.right;
829 if (fromArg == null && from == 0) left = pl;
830 if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
831 add(left, leftPos.top, null, leftPos.bottom);
833 if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
835 if (toArg == null && to == lineLen) right = clientWidth;
836 if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
838 if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
840 if (left < pl + 1) left = pl;
841 add(left, rightPos.top, right - left, rightPos.bottom);
843 return {start: start, end: end};
846 if (sel.from.line == sel.to.line) {
847 drawForLine(sel.from.line, sel.from.ch, sel.to.ch);
849 var fromLine = getLine(doc, sel.from.line), toLine = getLine(doc, sel.to.line);
850 var singleVLine = visualLine(doc, fromLine) == visualLine(doc, toLine);
851 var leftEnd = drawForLine(sel.from.line, sel.from.ch, singleVLine ? fromLine.text.length : null).end;
852 var rightStart = drawForLine(sel.to.line, singleVLine ? 0 : null, sel.to.ch).start;
854 if (leftEnd.top < rightStart.top - 2) {
855 add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
856 add(pl, rightStart.top, rightStart.left, rightStart.bottom);
858 add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
861 if (leftEnd.bottom < rightStart.top)
862 add(pl, leftEnd.bottom, null, rightStart.top);
865 removeChildrenAndAdd(display.selectionDiv, fragment);
866 display.selectionDiv.style.display = "";
870 function restartBlink(cm) {
871 if (!cm.state.focused) return;
872 var display = cm.display;
873 clearInterval(display.blinker);
875 display.cursor.style.visibility = display.otherCursor.style.visibility = "";
876 display.blinker = setInterval(function() {
877 display.cursor.style.visibility = display.otherCursor.style.visibility = (on = !on) ? "" : "hidden";
878 }, cm.options.cursorBlinkRate);
883 function startWorker(cm, time) {
884 if (cm.doc.mode.startState && cm.doc.frontier < cm.display.showingTo)
885 cm.state.highlight.set(time, bind(highlightWorker, cm));
888 function highlightWorker(cm) {
890 if (doc.frontier < doc.first) doc.frontier = doc.first;
891 if (doc.frontier >= cm.display.showingTo) return;
892 var end = +new Date + cm.options.workTime;
893 var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
894 var changed = [], prevChange;
895 doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.showingTo + 500), function(line) {
896 if (doc.frontier >= cm.display.showingFrom) { // Visible
897 var oldStyles = line.styles;
898 line.styles = highlightLine(cm, line, state);
899 var ischange = !oldStyles || oldStyles.length != line.styles.length;
900 for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
902 if (prevChange && prevChange.end == doc.frontier) prevChange.end++;
903 else changed.push(prevChange = {start: doc.frontier, end: doc.frontier + 1});
905 line.stateAfter = copyState(doc.mode, state);
907 processLine(cm, line, state);
908 line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
911 if (+new Date > end) {
912 startWorker(cm, cm.options.workDelay);
917 operation(cm, function() {
918 for (var i = 0; i < changed.length; ++i)
919 regChange(this, changed[i].start, changed[i].end);
923 // Finds the line to start with when starting a parse. Tries to
924 // find a line with a stateAfter, so that it can start with a
925 // valid state. If that fails, it returns the line with the
926 // smallest indentation, which tends to need the least context to
928 function findStartLine(cm, n, precise) {
929 var minindent, minline, doc = cm.doc;
930 for (var search = n, lim = n - 100; search > lim; --search) {
931 if (search <= doc.first) return doc.first;
932 var line = getLine(doc, search - 1);
933 if (line.stateAfter && (!precise || search <= doc.frontier)) return search;
934 var indented = countColumn(line.text, null, cm.options.tabSize);
935 if (minline == null || minindent > indented) {
936 minline = search - 1;
937 minindent = indented;
943 function getStateBefore(cm, n, precise) {
944 var doc = cm.doc, display = cm.display;
945 if (!doc.mode.startState) return true;
946 var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
947 if (!state) state = startState(doc.mode);
948 else state = copyState(doc.mode, state);
949 doc.iter(pos, n, function(line) {
950 processLine(cm, line, state);
951 var save = pos == n - 1 || pos % 5 == 0 || pos >= display.showingFrom && pos < display.showingTo;
952 line.stateAfter = save ? copyState(doc.mode, state) : null;
958 // POSITION MEASUREMENT
960 function paddingTop(display) {return display.lineSpace.offsetTop;}
961 function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;}
962 function paddingLeft(display) {
963 var e = removeChildrenAndAdd(display.measure, elt("pre", null, null, "text-align: left")).appendChild(elt("span", "x"));
967 function measureChar(cm, line, ch, data, bias) {
969 data = data || measureLine(cm, line);
971 for (var pos = ch;; pos += dir) {
974 if (dir < 0 && pos == 0) dir = 1;
976 bias = pos > ch ? "left" : pos < ch ? "right" : bias;
977 if (bias == "left" && r.leftSide) r = r.leftSide;
978 else if (bias == "right" && r.rightSide) r = r.rightSide;
979 return {left: pos < ch ? r.right : r.left,
980 right: pos > ch ? r.left : r.right,
985 function findCachedMeasurement(cm, line) {
986 var cache = cm.display.measureLineCache;
987 for (var i = 0; i < cache.length; ++i) {
989 if (memo.text == line.text && memo.markedSpans == line.markedSpans &&
990 cm.display.scroller.clientWidth == memo.width &&
991 memo.classes == line.textClass + "|" + line.bgClass + "|" + line.wrapClass)
996 function clearCachedMeasurement(cm, line) {
997 var exists = findCachedMeasurement(cm, line);
998 if (exists) exists.text = exists.measure = exists.markedSpans = null;
1001 function measureLine(cm, line) {
1002 // First look in the cache
1003 var cached = findCachedMeasurement(cm, line);
1004 if (cached) return cached.measure;
1006 // Failing that, recompute and store result in cache
1007 var measure = measureLineInner(cm, line);
1008 var cache = cm.display.measureLineCache;
1009 var memo = {text: line.text, width: cm.display.scroller.clientWidth,
1010 markedSpans: line.markedSpans, measure: measure,
1011 classes: line.textClass + "|" + line.bgClass + "|" + line.wrapClass};
1012 if (cache.length == 16) cache[++cm.display.measureLineCachePos % 16] = memo;
1013 else cache.push(memo);
1017 function measureLineInner(cm, line) {
1018 var display = cm.display, measure = emptyArray(line.text.length);
1019 var pre = lineContent(cm, line, measure, true);
1021 // IE does not cache element positions of inline elements between
1022 // calls to getBoundingClientRect. This makes the loop below,
1023 // which gathers the positions of all the characters on the line,
1024 // do an amount of layout work quadratic to the number of
1025 // characters. When line wrapping is off, we try to improve things
1026 // by first subdividing the line into a bunch of inline blocks, so
1027 // that IE can reuse most of the layout information from caches
1028 // for those blocks. This does interfere with line wrapping, so it
1029 // doesn't work when wrapping is on, but in that case the
1030 // situation is slightly better, since IE does cache line-wrapping
1031 // information and only recomputes per-line.
1032 if (ie && !ie_lt8 && !cm.options.lineWrapping && pre.childNodes.length > 100) {
1033 var fragment = document.createDocumentFragment();
1034 var chunk = 10, n = pre.childNodes.length;
1035 for (var i = 0, chunks = Math.ceil(n / chunk); i < chunks; ++i) {
1036 var wrap = elt("div", null, null, "display: inline-block");
1037 for (var j = 0; j < chunk && n; ++j) {
1038 wrap.appendChild(pre.firstChild);
1041 fragment.appendChild(wrap);
1043 pre.appendChild(fragment);
1046 removeChildrenAndAdd(display.measure, pre);
1048 var outer = getRect(display.lineDiv);
1049 var vranges = [], data = emptyArray(line.text.length), maxBot = pre.offsetHeight;
1050 // Work around an IE7/8 bug where it will sometimes have randomly
1051 // replaced our pre with a clone at this point.
1052 if (ie_lt9 && display.measure.first != pre)
1053 removeChildrenAndAdd(display.measure, pre);
1055 function measureRect(rect) {
1056 var top = rect.top - outer.top, bot = rect.bottom - outer.top;
1057 if (bot > maxBot) bot = maxBot;
1058 if (top < 0) top = 0;
1059 for (var i = vranges.length - 2; i >= 0; i -= 2) {
1060 var rtop = vranges[i], rbot = vranges[i+1];
1061 if (rtop > bot || rbot < top) continue;
1062 if (rtop <= top && rbot >= bot ||
1063 top <= rtop && bot >= rbot ||
1064 Math.min(bot, rbot) - Math.max(top, rtop) >= (bot - top) >> 1) {
1065 vranges[i] = Math.min(top, rtop);
1066 vranges[i+1] = Math.max(bot, rbot);
1070 if (i < 0) { i = vranges.length; vranges.push(top, bot); }
1071 return {left: rect.left - outer.left,
1072 right: rect.right - outer.left,
1073 top: i, bottom: null};
1075 function finishRect(rect) {
1076 rect.bottom = vranges[rect.top+1];
1077 rect.top = vranges[rect.top];
1080 for (var i = 0, cur; i < measure.length; ++i) if (cur = measure[i]) {
1081 var node = cur, rect = null;
1082 // A widget might wrap, needs special care
1083 if (/\bCodeMirror-widget\b/.test(cur.className) && cur.getClientRects) {
1084 if (cur.firstChild.nodeType == 1) node = cur.firstChild;
1085 var rects = node.getClientRects();
1086 if (rects.length > 1) {
1087 rect = data[i] = measureRect(rects[0]);
1088 rect.rightSide = measureRect(rects[rects.length - 1]);
1091 if (!rect) rect = data[i] = measureRect(getRect(node));
1092 if (cur.measureRight) rect.right = getRect(cur.measureRight).left;
1093 if (cur.leftSide) rect.leftSide = measureRect(getRect(cur.leftSide));
1095 for (var i = 0, cur; i < data.length; ++i) if (cur = data[i]) {
1097 if (cur.leftSide) finishRect(cur.leftSide);
1098 if (cur.rightSide) finishRect(cur.rightSide);
1103 function measureLineWidth(cm, line) {
1104 var hasBadSpan = false;
1105 if (line.markedSpans) for (var i = 0; i < line.markedSpans; ++i) {
1106 var sp = line.markedSpans[i];
1107 if (sp.collapsed && (sp.to == null || sp.to == line.text.length)) hasBadSpan = true;
1109 var cached = !hasBadSpan && findCachedMeasurement(cm, line);
1110 if (cached) return measureChar(cm, line, line.text.length, cached.measure, "right").right;
1112 var pre = lineContent(cm, line, null, true);
1113 var end = pre.appendChild(zeroWidthElement(cm.display.measure));
1114 removeChildrenAndAdd(cm.display.measure, pre);
1115 return getRect(end).right - getRect(cm.display.lineDiv).left;
1118 function clearCaches(cm) {
1119 cm.display.measureLineCache.length = cm.display.measureLineCachePos = 0;
1120 cm.display.cachedCharWidth = cm.display.cachedTextHeight = null;
1121 if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
1122 cm.display.lineNumChars = null;
1125 function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
1126 function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }
1128 // Context is one of "line", "div" (display.lineDiv), "local"/null (editor), or "page"
1129 function intoCoordSystem(cm, lineObj, rect, context) {
1130 if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
1131 var size = widgetHeight(lineObj.widgets[i]);
1132 rect.top += size; rect.bottom += size;
1134 if (context == "line") return rect;
1135 if (!context) context = "local";
1136 var yOff = heightAtLine(cm, lineObj);
1137 if (context == "local") yOff += paddingTop(cm.display);
1138 else yOff -= cm.display.viewOffset;
1139 if (context == "page" || context == "window") {
1140 var lOff = getRect(cm.display.lineSpace);
1141 yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
1142 var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
1143 rect.left += xOff; rect.right += xOff;
1145 rect.top += yOff; rect.bottom += yOff;
1149 // Context may be "window", "page", "div", or "local"/null
1150 // Result is in "div" coords
1151 function fromCoordSystem(cm, coords, context) {
1152 if (context == "div") return coords;
1153 var left = coords.left, top = coords.top;
1154 // First move into "page" coordinate system
1155 if (context == "page") {
1156 left -= pageScrollX();
1157 top -= pageScrollY();
1158 } else if (context == "local" || !context) {
1159 var localBox = getRect(cm.display.sizer);
1160 left += localBox.left;
1161 top += localBox.top;
1164 var lineSpaceBox = getRect(cm.display.lineSpace);
1165 return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
1168 function charCoords(cm, pos, context, lineObj, bias) {
1169 if (!lineObj) lineObj = getLine(cm.doc, pos.line);
1170 return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, null, bias), context);
1173 function cursorCoords(cm, pos, context, lineObj, measurement) {
1174 lineObj = lineObj || getLine(cm.doc, pos.line);
1175 if (!measurement) measurement = measureLine(cm, lineObj);
1176 function get(ch, right) {
1177 var m = measureChar(cm, lineObj, ch, measurement, right ? "right" : "left");
1178 if (right) m.left = m.right; else m.right = m.left;
1179 return intoCoordSystem(cm, lineObj, m, context);
1181 function getBidi(ch, partPos) {
1182 var part = order[partPos], right = part.level % 2;
1183 if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
1184 part = order[--partPos];
1185 ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
1187 } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
1188 part = order[++partPos];
1189 ch = bidiLeft(part) - part.level % 2;
1192 if (right && ch == part.to && ch > part.from) return get(ch - 1);
1193 return get(ch, right);
1195 var order = getOrder(lineObj), ch = pos.ch;
1196 if (!order) return get(ch);
1197 var partPos = getBidiPartAt(order, ch);
1198 var val = getBidi(ch, partPos);
1199 if (bidiOther != null) val.other = getBidi(ch, bidiOther);
1203 function PosWithInfo(line, ch, outside, xRel) {
1204 var pos = new Pos(line, ch);
1206 if (outside) pos.outside = true;
1210 // Coords must be lineSpace-local
1211 function coordsChar(cm, x, y) {
1213 y += cm.display.viewOffset;
1214 if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
1215 var lineNo = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
1217 return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1);
1221 var lineObj = getLine(doc, lineNo);
1222 var found = coordsCharInner(cm, lineObj, lineNo, x, y);
1223 var merged = collapsedSpanAtEnd(lineObj);
1224 var mergedPos = merged && merged.find();
1225 if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
1226 lineNo = mergedPos.to.line;
1232 function coordsCharInner(cm, lineObj, lineNo, x, y) {
1233 var innerOff = y - heightAtLine(cm, lineObj);
1234 var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
1235 var measurement = measureLine(cm, lineObj);
1238 var sp = cursorCoords(cm, Pos(lineNo, ch), "line",
1239 lineObj, measurement);
1241 if (innerOff > sp.bottom) return sp.left - adjust;
1242 else if (innerOff < sp.top) return sp.left + adjust;
1243 else wrongLine = false;
1247 var bidi = getOrder(lineObj), dist = lineObj.text.length;
1248 var from = lineLeft(lineObj), to = lineRight(lineObj);
1249 var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;
1251 if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
1252 // Do a binary search between these bounds.
1254 if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
1255 var ch = x < fromX || x - fromX <= toX - x ? from : to;
1256 var xDiff = x - (ch == from ? fromX : toX);
1257 while (isExtendingChar.test(lineObj.text.charAt(ch))) ++ch;
1258 var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside,
1259 xDiff < 0 ? -1 : xDiff ? 1 : 0);
1262 var step = Math.ceil(dist / 2), middle = from + step;
1265 for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
1267 var middleX = getX(middle);
1268 if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;}
1269 else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;}
1274 function textHeight(display) {
1275 if (display.cachedTextHeight != null) return display.cachedTextHeight;
1276 if (measureText == null) {
1277 measureText = elt("pre");
1278 // Measure a bunch of lines, for browsers that compute
1279 // fractional heights.
1280 for (var i = 0; i < 49; ++i) {
1281 measureText.appendChild(document.createTextNode("x"));
1282 measureText.appendChild(elt("br"));
1284 measureText.appendChild(document.createTextNode("x"));
1286 removeChildrenAndAdd(display.measure, measureText);
1287 var height = measureText.offsetHeight / 50;
1288 if (height > 3) display.cachedTextHeight = height;
1289 removeChildren(display.measure);
1293 function charWidth(display) {
1294 if (display.cachedCharWidth != null) return display.cachedCharWidth;
1295 var anchor = elt("span", "x");
1296 var pre = elt("pre", [anchor]);
1297 removeChildrenAndAdd(display.measure, pre);
1298 var width = anchor.offsetWidth;
1299 if (width > 2) display.cachedCharWidth = width;
1305 // Operations are used to wrap changes in such a way that each
1306 // change won't have to update the cursor and display (which would
1307 // be awkward, slow, and error-prone), but instead updates are
1308 // batched and then all combined and executed at once.
1311 function startOperation(cm) {
1313 // An array of ranges of lines that have to be updated. See
1318 userSelChange: null,
1320 selectionChanged: false,
1321 cursorActivity: false,
1322 updateMaxLine: false,
1323 updateScrollPos: false,
1326 if (!delayedCallbackDepth++) delayedCallbacks = [];
1329 function endOperation(cm) {
1330 var op = cm.curOp, doc = cm.doc, display = cm.display;
1333 if (op.updateMaxLine) computeMaxLength(cm);
1334 if (display.maxLineChanged && !cm.options.lineWrapping && display.maxLine) {
1335 var width = measureLineWidth(cm, display.maxLine);
1336 display.sizer.style.minWidth = Math.max(0, width + 3 + scrollerCutOff) + "px";
1337 display.maxLineChanged = false;
1338 var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + display.sizer.offsetWidth - display.scroller.clientWidth);
1339 if (maxScrollLeft < doc.scrollLeft && !op.updateScrollPos)
1340 setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true);
1342 var newScrollPos, updated;
1343 if (op.updateScrollPos) {
1344 newScrollPos = op.updateScrollPos;
1345 } else if (op.selectionChanged && display.scroller.clientHeight) { // don't rescroll if not visible
1346 var coords = cursorCoords(cm, doc.sel.head);
1347 newScrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom);
1349 if (op.changes.length || op.forceUpdate || newScrollPos && newScrollPos.scrollTop != null) {
1350 updated = updateDisplay(cm, op.changes, newScrollPos && newScrollPos.scrollTop, op.forceUpdate);
1351 if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroller.scrollTop;
1353 if (!updated && op.selectionChanged) updateSelection(cm);
1354 if (op.updateScrollPos) {
1355 display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = newScrollPos.scrollTop;
1356 display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLeft = newScrollPos.scrollLeft;
1357 alignHorizontally(cm);
1359 scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos), op.scrollToPosMargin);
1360 } else if (newScrollPos) {
1361 scrollCursorIntoView(cm);
1363 if (op.selectionChanged) restartBlink(cm);
1365 if (cm.state.focused && op.updateInput)
1366 resetInput(cm, op.userSelChange);
1368 var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
1369 if (hidden) for (var i = 0; i < hidden.length; ++i)
1370 if (!hidden[i].lines.length) signal(hidden[i], "hide");
1371 if (unhidden) for (var i = 0; i < unhidden.length; ++i)
1372 if (unhidden[i].lines.length) signal(unhidden[i], "unhide");
1375 if (!--delayedCallbackDepth) {
1376 delayed = delayedCallbacks;
1377 delayedCallbacks = null;
1380 signal(cm, "change", cm, op.textChanged);
1381 if (op.cursorActivity) signal(cm, "cursorActivity", cm);
1382 if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i]();
1385 // Wraps a function in an operation. Returns the wrapped function.
1386 function operation(cm1, f) {
1388 var cm = cm1 || this, withOp = !cm.curOp;
1389 if (withOp) startOperation(cm);
1390 try { var result = f.apply(cm, arguments); }
1391 finally { if (withOp) endOperation(cm); }
1395 function docOperation(f) {
1397 var withOp = this.cm && !this.cm.curOp, result;
1398 if (withOp) startOperation(this.cm);
1399 try { result = f.apply(this, arguments); }
1400 finally { if (withOp) endOperation(this.cm); }
1404 function runInOp(cm, f) {
1405 var withOp = !cm.curOp, result;
1406 if (withOp) startOperation(cm);
1407 try { result = f(); }
1408 finally { if (withOp) endOperation(cm); }
1412 function regChange(cm, from, to, lendiff) {
1413 if (from == null) from = cm.doc.first;
1414 if (to == null) to = cm.doc.first + cm.doc.size;
1415 cm.curOp.changes.push({from: from, to: to, diff: lendiff});
1420 function slowPoll(cm) {
1421 if (cm.display.pollingFast) return;
1422 cm.display.poll.set(cm.options.pollInterval, function() {
1424 if (cm.state.focused) slowPoll(cm);
1428 function fastPoll(cm) {
1430 cm.display.pollingFast = true;
1432 var changed = readInput(cm);
1433 if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);}
1434 else {cm.display.pollingFast = false; slowPoll(cm);}
1436 cm.display.poll.set(20, p);
1439 // prevInput is a hack to work with IME. If we reset the textarea
1440 // on every change, that breaks IME. So we look for changes
1441 // compared to the previous content instead. (Modern browsers have
1442 // events that indicate IME taking place, but these are not widely
1443 // supported or compatible enough yet to rely on.)
1444 function readInput(cm) {
1445 var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc, sel = doc.sel;
1446 if (!cm.state.focused || hasSelection(input) || isReadOnly(cm) || cm.state.disableInput) return false;
1447 var text = input.value;
1448 if (text == prevInput && posEq(sel.from, sel.to)) return false;
1449 if (ie && !ie_lt9 && cm.display.inputHasSelection === text) {
1450 resetInput(cm, true);
1454 var withOp = !cm.curOp;
1455 if (withOp) startOperation(cm);
1457 var same = 0, l = Math.min(prevInput.length, text.length);
1458 while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same;
1459 var from = sel.from, to = sel.to;
1460 if (same < prevInput.length)
1461 from = Pos(from.line, from.ch - (prevInput.length - same));
1462 else if (cm.state.overwrite && posEq(from, to) && !cm.state.pasteIncoming)
1463 to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + (text.length - same)));
1465 var updateInput = cm.curOp.updateInput;
1466 var changeEvent = {from: from, to: to, text: splitLines(text.slice(same)),
1467 origin: cm.state.pasteIncoming ? "paste" : "+input"};
1468 makeChange(cm.doc, changeEvent, "end");
1469 cm.curOp.updateInput = updateInput;
1470 signalLater(cm, "inputRead", cm, changeEvent);
1472 if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.prevInput = "";
1473 else cm.display.prevInput = text;
1474 if (withOp) endOperation(cm);
1475 cm.state.pasteIncoming = false;
1479 function resetInput(cm, user) {
1480 var minimal, selected, doc = cm.doc;
1481 if (!posEq(doc.sel.from, doc.sel.to)) {
1482 cm.display.prevInput = "";
1483 minimal = hasCopyEvent &&
1484 (doc.sel.to.line - doc.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000);
1485 var content = minimal ? "-" : selected || cm.getSelection();
1486 cm.display.input.value = content;
1487 if (cm.state.focused) selectInput(cm.display.input);
1488 if (ie && !ie_lt9) cm.display.inputHasSelection = content;
1490 cm.display.prevInput = cm.display.input.value = "";
1491 if (ie && !ie_lt9) cm.display.inputHasSelection = null;
1493 cm.display.inaccurateSelection = minimal;
1496 function focusInput(cm) {
1497 if (cm.options.readOnly != "nocursor" && (!mobile || document.activeElement != cm.display.input))
1498 cm.display.input.focus();
1501 function isReadOnly(cm) {
1502 return cm.options.readOnly || cm.doc.cantEdit;
1507 function registerEventHandlers(cm) {
1509 on(d.scroller, "mousedown", operation(cm, onMouseDown));
1511 on(d.scroller, "dblclick", operation(cm, function(e) {
1512 if (signalDOMEvent(cm, e)) return;
1513 var pos = posFromMouse(cm, e);
1514 if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return;
1515 e_preventDefault(e);
1516 var word = findWordAt(getLine(cm.doc, pos.line).text, pos);
1517 extendSelection(cm.doc, word.from, word.to);
1520 on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); });
1521 on(d.lineSpace, "selectstart", function(e) {
1522 if (!eventInWidget(d, e)) e_preventDefault(e);
1524 // Gecko browsers fire contextmenu *after* opening the menu, at
1525 // which point we can't mess with it anymore. Context menu is
1526 // handled in onMouseDown for Gecko.
1527 if (!captureMiddleClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
1529 on(d.scroller, "scroll", function() {
1530 if (d.scroller.clientHeight) {
1531 setScrollTop(cm, d.scroller.scrollTop);
1532 setScrollLeft(cm, d.scroller.scrollLeft, true);
1533 signal(cm, "scroll", cm);
1536 on(d.scrollbarV, "scroll", function() {
1537 if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop);
1539 on(d.scrollbarH, "scroll", function() {
1540 if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft);
1543 on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
1544 on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
1546 function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); }
1547 on(d.scrollbarH, "mousedown", reFocus);
1548 on(d.scrollbarV, "mousedown", reFocus);
1549 // Prevent wrapper from ever scrolling
1550 on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
1553 function onResize() {
1554 if (resizeTimer == null) resizeTimer = setTimeout(function() {
1556 // Might be a text scaling operation, clear size caches.
1557 d.cachedCharWidth = d.cachedTextHeight = knownScrollbarWidth = null;
1559 runInOp(cm, bind(regChange, cm));
1562 on(window, "resize", onResize);
1563 // Above handler holds on to the editor and its data structures.
1564 // Here we poll to unregister it when the editor is no longer in
1565 // the document, so that it can be garbage-collected.
1566 function unregister() {
1567 for (var p = d.wrapper.parentNode; p && p != document.body; p = p.parentNode) {}
1568 if (p) setTimeout(unregister, 5000);
1569 else off(window, "resize", onResize);
1571 setTimeout(unregister, 5000);
1573 on(d.input, "keyup", operation(cm, function(e) {
1574 if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
1575 if (e.keyCode == 16) cm.doc.sel.shift = false;
1577 on(d.input, "input", bind(fastPoll, cm));
1578 on(d.input, "keydown", operation(cm, onKeyDown));
1579 on(d.input, "keypress", operation(cm, onKeyPress));
1580 on(d.input, "focus", bind(onFocus, cm));
1581 on(d.input, "blur", bind(onBlur, cm));
1584 if (signalDOMEvent(cm, e) || cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return;
1587 if (cm.options.dragDrop) {
1588 on(d.scroller, "dragstart", function(e){onDragStart(cm, e);});
1589 on(d.scroller, "dragenter", drag_);
1590 on(d.scroller, "dragover", drag_);
1591 on(d.scroller, "drop", operation(cm, onDrop));
1593 on(d.scroller, "paste", function(e){
1594 if (eventInWidget(d, e)) return;
1598 on(d.input, "paste", function() {
1599 cm.state.pasteIncoming = true;
1603 function prepareCopy() {
1604 if (d.inaccurateSelection) {
1606 d.inaccurateSelection = false;
1607 d.input.value = cm.getSelection();
1608 selectInput(d.input);
1611 on(d.input, "cut", prepareCopy);
1612 on(d.input, "copy", prepareCopy);
1614 // Needed to handle Tab key in KHTML
1615 if (khtml) on(d.sizer, "mouseup", function() {
1616 if (document.activeElement == d.input) d.input.blur();
1621 function eventInWidget(display, e) {
1622 for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
1623 if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display.mover) return true;
1627 function posFromMouse(cm, e, liberal) {
1628 var display = cm.display;
1630 var target = e_target(e);
1631 if (target == display.scrollbarH || target == display.scrollbarH.firstChild ||
1632 target == display.scrollbarV || target == display.scrollbarV.firstChild ||
1633 target == display.scrollbarFiller || target == display.gutterFiller) return null;
1635 var x, y, space = getRect(display.lineSpace);
1636 // Fails unpredictably on IE[67] when mouse is dragged around quickly.
1637 try { x = e.clientX; y = e.clientY; } catch (e) { return null; }
1638 return coordsChar(cm, x - space.left, y - space.top);
1641 var lastClick, lastDoubleClick;
1642 function onMouseDown(e) {
1643 if (signalDOMEvent(this, e)) return;
1644 var cm = this, display = cm.display, doc = cm.doc, sel = doc.sel;
1645 sel.shift = e.shiftKey;
1647 if (eventInWidget(display, e)) {
1649 display.scroller.draggable = false;
1650 setTimeout(function(){display.scroller.draggable = true;}, 100);
1654 if (clickInGutter(cm, e)) return;
1655 var start = posFromMouse(cm, e);
1657 switch (e_button(e)) {
1659 if (captureMiddleClick) onContextMenu.call(cm, cm, e);
1662 if (start) extendSelection(cm.doc, start);
1663 setTimeout(bind(focusInput, cm), 20);
1664 e_preventDefault(e);
1667 // For button 1, if it was clicked inside the editor
1668 // (posFromMouse returning non-null), we have to adjust the
1670 if (!start) {if (e_target(e) == display.scroller) e_preventDefault(e); return;}
1672 if (!cm.state.focused) onFocus(cm);
1674 var now = +new Date, type = "single";
1675 if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {
1677 e_preventDefault(e);
1678 setTimeout(bind(focusInput, cm), 20);
1679 selectLine(cm, start.line);
1680 } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {
1682 lastDoubleClick = {time: now, pos: start};
1683 e_preventDefault(e);
1684 var word = findWordAt(getLine(doc, start.line).text, start);
1685 extendSelection(cm.doc, word.from, word.to);
1686 } else { lastClick = {time: now, pos: start}; }
1689 if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) && !posEq(sel.from, sel.to) &&
1690 !posLess(start, sel.from) && !posLess(sel.to, start) && type == "single") {
1691 var dragEnd = operation(cm, function(e2) {
1692 if (webkit) display.scroller.draggable = false;
1693 cm.state.draggingText = false;
1694 off(document, "mouseup", dragEnd);
1695 off(display.scroller, "drop", dragEnd);
1696 if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
1697 e_preventDefault(e2);
1698 extendSelection(cm.doc, start);
1702 // Let the drag handler handle this.
1703 if (webkit) display.scroller.draggable = true;
1704 cm.state.draggingText = dragEnd;
1705 // IE's approach to draggable
1706 if (display.scroller.dragDrop) display.scroller.dragDrop();
1707 on(document, "mouseup", dragEnd);
1708 on(display.scroller, "drop", dragEnd);
1711 e_preventDefault(e);
1712 if (type == "single") extendSelection(cm.doc, clipPos(doc, start));
1714 var startstart = sel.from, startend = sel.to, lastPos = start;
1716 function doSelect(cur) {
1717 if (posEq(lastPos, cur)) return;
1720 if (type == "single") {
1721 extendSelection(cm.doc, clipPos(doc, start), cur);
1725 startstart = clipPos(doc, startstart);
1726 startend = clipPos(doc, startend);
1727 if (type == "double") {
1728 var word = findWordAt(getLine(doc, cur.line).text, cur);
1729 if (posLess(cur, startstart)) extendSelection(cm.doc, word.from, startend);
1730 else extendSelection(cm.doc, startstart, word.to);
1731 } else if (type == "triple") {
1732 if (posLess(cur, startstart)) extendSelection(cm.doc, startend, clipPos(doc, Pos(cur.line, 0)));
1733 else extendSelection(cm.doc, startstart, clipPos(doc, Pos(cur.line + 1, 0)));
1737 var editorSize = getRect(display.wrapper);
1738 // Used to ensure timeout re-tries don't fire when another extend
1739 // happened in the meantime (clearTimeout isn't reliable -- at
1740 // least on Chrome, the timeouts still happen even when cleared,
1741 // if the clear happens after their scheduled firing time).
1744 function extend(e) {
1745 var curCount = ++counter;
1746 var cur = posFromMouse(cm, e, true);
1748 if (!posEq(cur, last)) {
1749 if (!cm.state.focused) onFocus(cm);
1752 var visible = visibleLines(display, doc);
1753 if (cur.line >= visible.to || cur.line < visible.from)
1754 setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
1756 var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
1757 if (outside) setTimeout(operation(cm, function() {
1758 if (counter != curCount) return;
1759 display.scroller.scrollTop += outside;
1767 e_preventDefault(e);
1769 off(document, "mousemove", move);
1770 off(document, "mouseup", up);
1773 var move = operation(cm, function(e) {
1774 if (!ie && !e_button(e)) done(e);
1777 var up = operation(cm, done);
1778 on(document, "mousemove", move);
1779 on(document, "mouseup", up);
1782 function clickInGutter(cm, e) {
1783 var display = cm.display;
1784 try { var mX = e.clientX, mY = e.clientY; }
1785 catch(e) { return false; }
1787 if (mX >= Math.floor(getRect(display.gutters).right)) return false;
1788 e_preventDefault(e);
1789 if (!hasHandler(cm, "gutterClick")) return true;
1791 var lineBox = getRect(display.lineDiv);
1792 if (mY > lineBox.bottom) return true;
1793 mY -= lineBox.top - display.viewOffset;
1795 for (var i = 0; i < cm.options.gutters.length; ++i) {
1796 var g = display.gutters.childNodes[i];
1797 if (g && getRect(g).right >= mX) {
1798 var line = lineAtHeight(cm.doc, mY);
1799 var gutter = cm.options.gutters[i];
1800 signalLater(cm, "gutterClick", cm, line, gutter, e);
1807 // Kludge to work around strange IE behavior where it'll sometimes
1808 // re-fire a series of drag-related events right after the drop (#1551)
1811 function onDrop(e) {
1813 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e) || (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))))
1815 e_preventDefault(e);
1816 if (ie) lastDrop = +new Date;
1817 var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
1818 if (!pos || isReadOnly(cm)) return;
1819 if (files && files.length && window.FileReader && window.File) {
1820 var n = files.length, text = Array(n), read = 0;
1821 var loadFile = function(file, i) {
1822 var reader = new FileReader;
1823 reader.onload = function() {
1824 text[i] = reader.result;
1826 pos = clipPos(cm.doc, pos);
1827 makeChange(cm.doc, {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"}, "around");
1830 reader.readAsText(file);
1832 for (var i = 0; i < n; ++i) loadFile(files[i], i);
1834 // Don't do a replace if the drop happened inside of the selected text.
1835 if (cm.state.draggingText && !(posLess(pos, cm.doc.sel.from) || posLess(cm.doc.sel.to, pos))) {
1836 cm.state.draggingText(e);
1837 // Ensure the editor is re-focused
1838 setTimeout(bind(focusInput, cm), 20);
1842 var text = e.dataTransfer.getData("Text");
1844 var curFrom = cm.doc.sel.from, curTo = cm.doc.sel.to;
1845 setSelection(cm.doc, pos, pos);
1846 if (cm.state.draggingText) replaceRange(cm.doc, "", curFrom, curTo, "paste");
1847 cm.replaceSelection(text, null, "paste");
1856 function onDragStart(cm, e) {
1857 if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
1858 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
1860 var txt = cm.getSelection();
1861 e.dataTransfer.setData("Text", txt);
1863 // Use dummy image instead of default browsers image.
1864 // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
1865 if (e.dataTransfer.setDragImage && !safari) {
1866 var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
1868 img.width = img.height = 1;
1869 cm.display.wrapper.appendChild(img);
1870 // Force a relayout, or Opera won't use our image for some obscure reason
1871 img._top = img.offsetTop;
1873 e.dataTransfer.setDragImage(img, 0, 0);
1874 if (opera) img.parentNode.removeChild(img);
1878 function setScrollTop(cm, val) {
1879 if (Math.abs(cm.doc.scrollTop - val) < 2) return;
1880 cm.doc.scrollTop = val;
1881 if (!gecko) updateDisplay(cm, [], val);
1882 if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
1883 if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val;
1884 if (gecko) updateDisplay(cm, []);
1885 startWorker(cm, 100);
1887 function setScrollLeft(cm, val, isScroller) {
1888 if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return;
1889 val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
1890 cm.doc.scrollLeft = val;
1891 alignHorizontally(cm);
1892 if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
1893 if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val;
1896 // Since the delta values reported on mouse wheel events are
1897 // unstandardized between browsers and even browser versions, and
1898 // generally horribly unpredictable, this code starts by measuring
1899 // the scroll effect that the first few mouse wheel events have,
1900 // and, from that, detects the way it can convert deltas to pixel
1901 // offsets afterwards.
1903 // The reason we want to know the amount a wheel event will scroll
1904 // is that it gives us a chance to update the display before the
1905 // actual scrolling happens, reducing flickering.
1907 var wheelSamples = 0, wheelPixelsPerUnit = null;
1908 // Fill in a browser-detected starting value on browsers where we
1909 // know one. These don't have to be accurate -- the result of them
1910 // being wrong would just be a slight flicker on the first wheel
1911 // scroll (if it is large enough).
1912 if (ie) wheelPixelsPerUnit = -.53;
1913 else if (gecko) wheelPixelsPerUnit = 15;
1914 else if (chrome) wheelPixelsPerUnit = -.7;
1915 else if (safari) wheelPixelsPerUnit = -1/3;
1917 function onScrollWheel(cm, e) {
1918 var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
1919 if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
1920 if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
1921 else if (dy == null) dy = e.wheelDelta;
1923 var display = cm.display, scroll = display.scroller;
1924 // Quit if there's nothing to scroll here
1925 if (!(dx && scroll.scrollWidth > scroll.clientWidth ||
1926 dy && scroll.scrollHeight > scroll.clientHeight)) return;
1928 // Webkit browsers on OS X abort momentum scrolls when the target
1929 // of the scroll event is removed from the scrollable element.
1930 // This hack (see related code in patchDisplay) makes sure the
1931 // element is kept around.
1932 if (dy && mac && webkit) {
1933 for (var cur = e.target; cur != scroll; cur = cur.parentNode) {
1935 cm.display.currentWheelTarget = cur;
1941 // On some browsers, horizontal scrolling will cause redraws to
1942 // happen before the gutter has been realigned, causing it to
1943 // wriggle around in a most unseemly way. When we have an
1944 // estimated pixels/delta value, we just handle horizontal
1945 // scrolling entirely here. It'll be slightly off from native, but
1946 // better than glitching out.
1947 if (dx && !gecko && !opera && wheelPixelsPerUnit != null) {
1949 setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
1950 setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
1951 e_preventDefault(e);
1952 display.wheelStartX = null; // Abort measurement, if in progress
1956 if (dy && wheelPixelsPerUnit != null) {
1957 var pixels = dy * wheelPixelsPerUnit;
1958 var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
1959 if (pixels < 0) top = Math.max(0, top + pixels - 50);
1960 else bot = Math.min(cm.doc.height, bot + pixels + 50);
1961 updateDisplay(cm, [], {top: top, bottom: bot});
1964 if (wheelSamples < 20) {
1965 if (display.wheelStartX == null) {
1966 display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
1967 display.wheelDX = dx; display.wheelDY = dy;
1968 setTimeout(function() {
1969 if (display.wheelStartX == null) return;
1970 var movedX = scroll.scrollLeft - display.wheelStartX;
1971 var movedY = scroll.scrollTop - display.wheelStartY;
1972 var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
1973 (movedX && display.wheelDX && movedX / display.wheelDX);
1974 display.wheelStartX = display.wheelStartY = null;
1975 if (!sample) return;
1976 wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
1980 display.wheelDX += dx; display.wheelDY += dy;
1985 function doHandleBinding(cm, bound, dropShift) {
1986 if (typeof bound == "string") {
1987 bound = commands[bound];
1988 if (!bound) return false;
1990 // Ensure previous input has been read, so that the handler sees a
1991 // consistent view of the document
1992 if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false;
1993 var doc = cm.doc, prevShift = doc.sel.shift, done = false;
1995 if (isReadOnly(cm)) cm.state.suppressEdits = true;
1996 if (dropShift) doc.sel.shift = false;
1997 done = bound(cm) != Pass;
1999 doc.sel.shift = prevShift;
2000 cm.state.suppressEdits = false;
2005 function allKeyMaps(cm) {
2006 var maps = cm.state.keyMaps.slice(0);
2007 if (cm.options.extraKeys) maps.push(cm.options.extraKeys);
2008 maps.push(cm.options.keyMap);
2012 var maybeTransition;
2013 function handleKeyBinding(cm, e) {
2014 // Handle auto keymap transitions
2015 var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto;
2016 clearTimeout(maybeTransition);
2017 if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
2018 if (getKeyMap(cm.options.keyMap) == startMap) {
2019 cm.options.keyMap = (next.call ? next.call(null, cm) : next);
2024 var name = keyName(e, true), handled = false;
2025 if (!name) return false;
2026 var keymaps = allKeyMaps(cm);
2029 // First try to resolve full name (including 'Shift-'). Failing
2030 // that, see if there is a cursor-motion command (starting with
2031 // 'go') bound to the keyname without 'Shift-'.
2032 handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandleBinding(cm, b, true);})
2033 || lookupKey(name, keymaps, function(b) {
2034 if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
2035 return doHandleBinding(cm, b);
2038 handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm, b); });
2042 e_preventDefault(e);
2044 if (ie_lt9) { e.oldKeyCode = e.keyCode; e.keyCode = 0; }
2045 signalLater(cm, "keyHandled", cm, name, e);
2050 function handleCharBinding(cm, e, ch) {
2051 var handled = lookupKey("'" + ch + "'", allKeyMaps(cm),
2052 function(b) { return doHandleBinding(cm, b, true); });
2054 e_preventDefault(e);
2056 signalLater(cm, "keyHandled", cm, "'" + ch + "'", e);
2061 var lastStoppedKey = null;
2062 function onKeyDown(e) {
2064 if (!cm.state.focused) onFocus(cm);
2065 if (ie && e.keyCode == 27) { e.returnValue = false; }
2066 if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
2067 var code = e.keyCode;
2068 // IE does strange things with escape.
2069 cm.doc.sel.shift = code == 16 || e.shiftKey;
2070 // First give onKeyEvent option a chance to handle this.
2071 var handled = handleKeyBinding(cm, e);
2073 lastStoppedKey = handled ? code : null;
2074 // Opera has no cut event... we try to at least catch the key combo
2075 if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
2076 cm.replaceSelection("");
2080 function onKeyPress(e) {
2082 if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
2083 var keyCode = e.keyCode, charCode = e.charCode;
2084 if (opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
2085 if (((opera && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return;
2086 var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
2087 if (this.options.electricChars && this.doc.mode.electricChars &&
2088 this.options.smartIndent && !isReadOnly(this) &&
2089 this.doc.mode.electricChars.indexOf(ch) > -1)
2090 setTimeout(operation(cm, function() {indentLine(cm, cm.doc.sel.to.line, "smart");}), 75);
2091 if (handleCharBinding(cm, e, ch)) return;
2092 if (ie && !ie_lt9) cm.display.inputHasSelection = null;
2096 function onFocus(cm) {
2097 if (cm.options.readOnly == "nocursor") return;
2098 if (!cm.state.focused) {
2099 signal(cm, "focus", cm);
2100 cm.state.focused = true;
2101 if (cm.display.wrapper.className.search(/\bCodeMirror-focused\b/) == -1)
2102 cm.display.wrapper.className += " CodeMirror-focused";
2103 resetInput(cm, true);
2108 function onBlur(cm) {
2109 if (cm.state.focused) {
2110 signal(cm, "blur", cm);
2111 cm.state.focused = false;
2112 cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-focused", "");
2114 clearInterval(cm.display.blinker);
2115 setTimeout(function() {if (!cm.state.focused) cm.doc.sel.shift = false;}, 150);
2118 var detectingSelectAll;
2119 function onContextMenu(cm, e) {
2120 if (signalDOMEvent(cm, e, "contextmenu")) return;
2121 var display = cm.display, sel = cm.doc.sel;
2122 if (eventInWidget(display, e)) return;
2124 var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
2125 if (!pos || opera) return; // Opera is difficult.
2126 if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))
2127 operation(cm, setSelection)(cm.doc, pos, pos);
2129 var oldCSS = display.input.style.cssText;
2130 display.inputDiv.style.position = "absolute";
2131 display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
2132 "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: white; outline: none;" +
2133 "border-width: 0; outline: none; overflow: hidden; opacity: .05; -ms-opacity: .05; filter: alpha(opacity=5);";
2135 resetInput(cm, true);
2136 // Adds "Select all" to context menu in FF
2137 if (posEq(sel.from, sel.to)) display.input.value = display.prevInput = " ";
2139 function prepareSelectAllHack() {
2140 if (display.input.selectionStart != null) {
2141 var extval = display.input.value = " " + (posEq(sel.from, sel.to) ? "" : display.input.value);
2142 display.prevInput = " ";
2143 display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
2147 display.inputDiv.style.position = "relative";
2148 display.input.style.cssText = oldCSS;
2149 if (ie_lt9) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
2152 // Try to detect the user choosing select-all
2153 if (display.input.selectionStart != null) {
2154 if (!ie || ie_lt9) prepareSelectAllHack();
2155 clearTimeout(detectingSelectAll);
2156 var i = 0, poll = function(){
2157 if (display.prevInput == " " && display.input.selectionStart == 0)
2158 operation(cm, commands.selectAll)(cm);
2159 else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
2160 else resetInput(cm);
2162 detectingSelectAll = setTimeout(poll, 200);
2166 if (ie && !ie_lt9) prepareSelectAllHack();
2167 if (captureMiddleClick) {
2169 var mouseup = function() {
2170 off(window, "mouseup", mouseup);
2171 setTimeout(rehide, 20);
2173 on(window, "mouseup", mouseup);
2175 setTimeout(rehide, 50);
2181 var changeEnd = CodeMirror.changeEnd = function(change) {
2182 if (!change.text) return change.to;
2183 return Pos(change.from.line + change.text.length - 1,
2184 lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0));
2187 // Make sure a position will be valid after the given change.
2188 function clipPostChange(doc, change, pos) {
2189 if (!posLess(change.from, pos)) return clipPos(doc, pos);
2190 var diff = (change.text.length - 1) - (change.to.line - change.from.line);
2191 if (pos.line > change.to.line + diff) {
2192 var preLine = pos.line - diff, lastLine = doc.first + doc.size - 1;
2193 if (preLine > lastLine) return Pos(lastLine, getLine(doc, lastLine).text.length);
2194 return clipToLen(pos, getLine(doc, preLine).text.length);
2196 if (pos.line == change.to.line + diff)
2197 return clipToLen(pos, lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0) +
2198 getLine(doc, change.to.line).text.length - change.to.ch);
2199 var inside = pos.line - change.from.line;
2200 return clipToLen(pos, change.text[inside].length + (inside ? 0 : change.from.ch));
2203 // Hint can be null|"end"|"start"|"around"|{anchor,head}
2204 function computeSelAfterChange(doc, change, hint) {
2205 if (hint && typeof hint == "object") // Assumed to be {anchor, head} object
2206 return {anchor: clipPostChange(doc, change, hint.anchor),
2207 head: clipPostChange(doc, change, hint.head)};
2209 if (hint == "start") return {anchor: change.from, head: change.from};
2211 var end = changeEnd(change);
2212 if (hint == "around") return {anchor: change.from, head: end};
2213 if (hint == "end") return {anchor: end, head: end};
2215 // hint is null, leave the selection alone as much as possible
2216 var adjustPos = function(pos) {
2217 if (posLess(pos, change.from)) return pos;
2218 if (!posLess(change.to, pos)) return end;
2220 var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
2221 if (pos.line == change.to.line) ch += end.ch - change.to.ch;
2222 return Pos(line, ch);
2224 return {anchor: adjustPos(doc.sel.anchor), head: adjustPos(doc.sel.head)};
2227 function filterChange(doc, change, update) {
2233 origin: change.origin,
2234 cancel: function() { this.canceled = true; }
2236 if (update) obj.update = function(from, to, text, origin) {
2237 if (from) this.from = clipPos(doc, from);
2238 if (to) this.to = clipPos(doc, to);
2239 if (text) this.text = text;
2240 if (origin !== undefined) this.origin = origin;
2242 signal(doc, "beforeChange", doc, obj);
2243 if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);
2245 if (obj.canceled) return null;
2246 return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};
2249 // Replace the range from from to to by the strings in replacement.
2250 // change is a {from, to, text [, origin]} object
2251 function makeChange(doc, change, selUpdate, ignoreReadOnly) {
2253 if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, selUpdate, ignoreReadOnly);
2254 if (doc.cm.state.suppressEdits) return;
2257 if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
2258 change = filterChange(doc, change, true);
2259 if (!change) return;
2262 // Possibly split or suppress the update based on the presence
2263 // of read-only spans in its range.
2264 var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
2266 for (var i = split.length - 1; i >= 1; --i)
2267 makeChangeNoReadonly(doc, {from: split[i].from, to: split[i].to, text: [""]});
2269 makeChangeNoReadonly(doc, {from: split[0].from, to: split[0].to, text: change.text}, selUpdate);
2271 makeChangeNoReadonly(doc, change, selUpdate);
2275 function makeChangeNoReadonly(doc, change, selUpdate) {
2276 var selAfter = computeSelAfterChange(doc, change, selUpdate);
2277 addToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
2279 makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
2282 linkedDocs(doc, function(doc, sharedHist) {
2283 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
2284 rebaseHist(doc.history, change);
2285 rebased.push(doc.history);
2287 makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
2291 function makeChangeFromHistory(doc, type) {
2292 if (doc.cm && doc.cm.state.suppressEdits) return;
2294 var hist = doc.history;
2295 var event = (type == "undo" ? hist.done : hist.undone).pop();
2298 var anti = {changes: [], anchorBefore: event.anchorAfter, headBefore: event.headAfter,
2299 anchorAfter: event.anchorBefore, headAfter: event.headBefore,
2300 generation: hist.generation};
2301 (type == "undo" ? hist.undone : hist.done).push(anti);
2302 hist.generation = event.generation || ++hist.maxGeneration;
2304 var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
2306 for (var i = event.changes.length - 1; i >= 0; --i) {
2307 var change = event.changes[i];
2308 change.origin = type;
2309 if (filter && !filterChange(doc, change, false)) {
2310 (type == "undo" ? hist.done : hist.undone).length = 0;
2314 anti.changes.push(historyChangeFromChange(doc, change));
2316 var after = i ? computeSelAfterChange(doc, change, null)
2317 : {anchor: event.anchorBefore, head: event.headBefore};
2318 makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
2321 linkedDocs(doc, function(doc, sharedHist) {
2322 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
2323 rebaseHist(doc.history, change);
2324 rebased.push(doc.history);
2326 makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
2331 function shiftDoc(doc, distance) {
2332 function shiftPos(pos) {return Pos(pos.line + distance, pos.ch);}
2333 doc.first += distance;
2334 if (doc.cm) regChange(doc.cm, doc.first, doc.first, distance);
2335 doc.sel.head = shiftPos(doc.sel.head); doc.sel.anchor = shiftPos(doc.sel.anchor);
2336 doc.sel.from = shiftPos(doc.sel.from); doc.sel.to = shiftPos(doc.sel.to);
2339 function makeChangeSingleDoc(doc, change, selAfter, spans) {
2340 if (doc.cm && !doc.cm.curOp)
2341 return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);
2343 if (change.to.line < doc.first) {
2344 shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
2347 if (change.from.line > doc.lastLine()) return;
2349 // Clip the change to the size of this doc
2350 if (change.from.line < doc.first) {
2351 var shift = change.text.length - 1 - (doc.first - change.from.line);
2352 shiftDoc(doc, shift);
2353 change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
2354 text: [lst(change.text)], origin: change.origin};
2356 var last = doc.lastLine();
2357 if (change.to.line > last) {
2358 change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
2359 text: [change.text[0]], origin: change.origin};
2362 change.removed = getBetween(doc, change.from, change.to);
2364 if (!selAfter) selAfter = computeSelAfterChange(doc, change, null);
2365 if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans, selAfter);
2366 else updateDoc(doc, change, spans, selAfter);
2369 function makeChangeSingleDocInEditor(cm, change, spans, selAfter) {
2370 var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
2372 var recomputeMaxLength = false, checkWidthStart = from.line;
2373 if (!cm.options.lineWrapping) {
2374 checkWidthStart = lineNo(visualLine(doc, getLine(doc, from.line)));
2375 doc.iter(checkWidthStart, to.line + 1, function(line) {
2376 if (line == display.maxLine) {
2377 recomputeMaxLength = true;
2383 if (!posLess(doc.sel.head, change.from) && !posLess(change.to, doc.sel.head))
2384 cm.curOp.cursorActivity = true;
2386 updateDoc(doc, change, spans, selAfter, estimateHeight(cm));
2388 if (!cm.options.lineWrapping) {
2389 doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
2390 var len = lineLength(doc, line);
2391 if (len > display.maxLineLength) {
2392 display.maxLine = line;
2393 display.maxLineLength = len;
2394 display.maxLineChanged = true;
2395 recomputeMaxLength = false;
2398 if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
2401 // Adjust frontier, schedule worker
2402 doc.frontier = Math.min(doc.frontier, from.line);
2403 startWorker(cm, 400);
2405 var lendiff = change.text.length - (to.line - from.line) - 1;
2406 // Remember that these lines changed, for updating the display
2407 regChange(cm, from.line, to.line + 1, lendiff);
2409 if (hasHandler(cm, "change")) {
2410 var changeObj = {from: from, to: to,
2412 removed: change.removed,
2413 origin: change.origin};
2414 if (cm.curOp.textChanged) {
2415 for (var cur = cm.curOp.textChanged; cur.next; cur = cur.next) {}
2416 cur.next = changeObj;
2417 } else cm.curOp.textChanged = changeObj;
2421 function replaceRange(doc, code, from, to, origin) {
2423 if (posLess(to, from)) { var tmp = to; to = from; from = tmp; }
2424 if (typeof code == "string") code = splitLines(code);
2425 makeChange(doc, {from: from, to: to, text: code, origin: origin}, null);
2430 function Pos(line, ch) {
2431 if (!(this instanceof Pos)) return new Pos(line, ch);
2432 this.line = line; this.ch = ch;
2434 CodeMirror.Pos = Pos;
2436 function posEq(a, b) {return a.line == b.line && a.ch == b.ch;}
2437 function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);}
2438 function copyPos(x) {return Pos(x.line, x.ch);}
2442 function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
2443 function clipPos(doc, pos) {
2444 if (pos.line < doc.first) return Pos(doc.first, 0);
2445 var last = doc.first + doc.size - 1;
2446 if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
2447 return clipToLen(pos, getLine(doc, pos.line).text.length);
2449 function clipToLen(pos, linelen) {
2451 if (ch == null || ch > linelen) return Pos(pos.line, linelen);
2452 else if (ch < 0) return Pos(pos.line, 0);
2455 function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
2457 // If shift is held, this will move the selection anchor. Otherwise,
2458 // it'll set the whole selection.
2459 function extendSelection(doc, pos, other, bias) {
2460 if (doc.sel.shift || doc.sel.extend) {
2461 var anchor = doc.sel.anchor;
2463 var posBefore = posLess(pos, anchor);
2464 if (posBefore != posLess(other, anchor)) {
2467 } else if (posBefore != posLess(pos, other)) {
2471 setSelection(doc, anchor, pos, bias);
2473 setSelection(doc, pos, other || pos, bias);
2475 if (doc.cm) doc.cm.curOp.userSelChange = true;
2478 function filterSelectionChange(doc, anchor, head) {
2479 var obj = {anchor: anchor, head: head};
2480 signal(doc, "beforeSelectionChange", doc, obj);
2481 if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
2482 obj.anchor = clipPos(doc, obj.anchor); obj.head = clipPos(doc, obj.head);
2486 // Update the selection. Last two args are only used by
2487 // updateDoc, since they have to be expressed in the line
2488 // numbers before the update.
2489 function setSelection(doc, anchor, head, bias, checkAtomic) {
2490 if (!checkAtomic && hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) {
2491 var filtered = filterSelectionChange(doc, anchor, head);
2492 head = filtered.head;
2493 anchor = filtered.anchor;
2497 sel.goalColumn = null;
2498 // Skip over atomic spans.
2499 if (checkAtomic || !posEq(anchor, sel.anchor))
2500 anchor = skipAtomic(doc, anchor, bias, checkAtomic != "push");
2501 if (checkAtomic || !posEq(head, sel.head))
2502 head = skipAtomic(doc, head, bias, checkAtomic != "push");
2504 if (posEq(sel.anchor, anchor) && posEq(sel.head, head)) return;
2506 sel.anchor = anchor; sel.head = head;
2507 var inv = posLess(head, anchor);
2508 sel.from = inv ? head : anchor;
2509 sel.to = inv ? anchor : head;
2512 doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged =
2513 doc.cm.curOp.cursorActivity = true;
2515 signalLater(doc, "cursorActivity", doc);
2518 function reCheckSelection(cm) {
2519 setSelection(cm.doc, cm.doc.sel.from, cm.doc.sel.to, null, "push");
2522 function skipAtomic(doc, pos, bias, mayClear) {
2523 var flipped = false, curPos = pos;
2524 var dir = bias || 1;
2525 doc.cantEdit = false;
2527 var line = getLine(doc, curPos.line);
2528 if (line.markedSpans) {
2529 for (var i = 0; i < line.markedSpans.length; ++i) {
2530 var sp = line.markedSpans[i], m = sp.marker;
2531 if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
2532 (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
2534 signal(m, "beforeCursorEnter");
2535 if (m.explicitlyCleared) {
2536 if (!line.markedSpans) break;
2537 else {--i; continue;}
2540 if (!m.atomic) continue;
2541 var newPos = m.find()[dir < 0 ? "from" : "to"];
2542 if (posEq(newPos, curPos)) {
2544 if (newPos.ch < 0) {
2545 if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1));
2547 } else if (newPos.ch > line.text.length) {
2548 if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0);
2553 // Driven in a corner -- no valid cursor position found at all
2554 // -- try again *with* clearing, if we didn't already
2555 if (!mayClear) return skipAtomic(doc, pos, bias, true);
2556 // Otherwise, turn off editing until further notice, and return the start of the doc
2557 doc.cantEdit = true;
2558 return Pos(doc.first, 0);
2560 flipped = true; newPos = pos; dir = -dir;
2574 function scrollCursorIntoView(cm) {
2575 var coords = scrollPosIntoView(cm, cm.doc.sel.head, cm.options.cursorScrollMargin);
2576 if (!cm.state.focused) return;
2577 var display = cm.display, box = getRect(display.sizer), doScroll = null;
2578 if (coords.top + box.top < 0) doScroll = true;
2579 else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
2580 if (doScroll != null && !phantom) {
2581 var hidden = display.cursor.style.display == "none";
2583 display.cursor.style.display = "";
2584 display.cursor.style.left = coords.left + "px";
2585 display.cursor.style.top = (coords.top - display.viewOffset) + "px";
2587 display.cursor.scrollIntoView(doScroll);
2588 if (hidden) display.cursor.style.display = "none";
2592 function scrollPosIntoView(cm, pos, margin) {
2593 if (margin == null) margin = 0;
2595 var changed = false, coords = cursorCoords(cm, pos);
2596 var scrollPos = calculateScrollPos(cm, coords.left, coords.top - margin, coords.left, coords.bottom + margin);
2597 var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
2598 if (scrollPos.scrollTop != null) {
2599 setScrollTop(cm, scrollPos.scrollTop);
2600 if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
2602 if (scrollPos.scrollLeft != null) {
2603 setScrollLeft(cm, scrollPos.scrollLeft);
2604 if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
2606 if (!changed) return coords;
2610 function scrollIntoView(cm, x1, y1, x2, y2) {
2611 var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
2612 if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
2613 if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
2616 function calculateScrollPos(cm, x1, y1, x2, y2) {
2617 var display = cm.display, snapMargin = textHeight(cm.display);
2619 var screen = display.scroller.clientHeight - scrollerCutOff, screentop = display.scroller.scrollTop, result = {};
2620 var docBottom = cm.doc.height + paddingVert(display);
2621 var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
2622 if (y1 < screentop) {
2623 result.scrollTop = atTop ? 0 : y1;
2624 } else if (y2 > screentop + screen) {
2625 var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
2626 if (newTop != screentop) result.scrollTop = newTop;
2629 var screenw = display.scroller.clientWidth - scrollerCutOff, screenleft = display.scroller.scrollLeft;
2630 x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
2631 var gutterw = display.gutters.offsetWidth;
2632 var atLeft = x1 < gutterw + 10;
2633 if (x1 < screenleft + gutterw || atLeft) {
2635 result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
2636 } else if (x2 > screenw + screenleft - 3) {
2637 result.scrollLeft = x2 + 10 - screenw;
2642 function updateScrollPos(cm, left, top) {
2643 cm.curOp.updateScrollPos = {scrollLeft: left == null ? cm.doc.scrollLeft : left,
2644 scrollTop: top == null ? cm.doc.scrollTop : top};
2647 function addToScrollPos(cm, left, top) {
2648 var pos = cm.curOp.updateScrollPos || (cm.curOp.updateScrollPos = {scrollLeft: cm.doc.scrollLeft, scrollTop: cm.doc.scrollTop});
2649 var scroll = cm.display.scroller;
2650 pos.scrollTop = Math.max(0, Math.min(scroll.scrollHeight - scroll.clientHeight, pos.scrollTop + top));
2651 pos.scrollLeft = Math.max(0, Math.min(scroll.scrollWidth - scroll.clientWidth, pos.scrollLeft + left));
2656 function indentLine(cm, n, how, aggressive) {
2658 if (how == null) how = "add";
2659 if (how == "smart") {
2660 if (!cm.doc.mode.indent) how = "prev";
2661 else var state = getStateBefore(cm, n);
2664 var tabSize = cm.options.tabSize;
2665 var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
2666 var curSpaceString = line.text.match(/^\s*/)[0], indentation;
2667 if (how == "smart") {
2668 indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
2669 if (indentation == Pass) {
2670 if (!aggressive) return;
2674 if (how == "prev") {
2675 if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
2676 else indentation = 0;
2677 } else if (how == "add") {
2678 indentation = curSpace + cm.options.indentUnit;
2679 } else if (how == "subtract") {
2680 indentation = curSpace - cm.options.indentUnit;
2681 } else if (typeof how == "number") {
2682 indentation = curSpace + how;
2684 indentation = Math.max(0, indentation);
2686 var indentString = "", pos = 0;
2687 if (cm.options.indentWithTabs)
2688 for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
2689 if (pos < indentation) indentString += spaceStr(indentation - pos);
2691 if (indentString != curSpaceString)
2692 replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
2693 line.stateAfter = null;
2696 function changeLine(cm, handle, op) {
2697 var no = handle, line = handle, doc = cm.doc;
2698 if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
2699 else no = lineNo(handle);
2700 if (no == null) return null;
2701 if (op(line, no)) regChange(cm, no, no + 1);
2706 function findPosH(doc, pos, dir, unit, visually) {
2707 var line = pos.line, ch = pos.ch, origDir = dir;
2708 var lineObj = getLine(doc, line);
2709 var possible = true;
2710 function findNextLine() {
2712 if (l < doc.first || l >= doc.first + doc.size) return (possible = false);
2714 return lineObj = getLine(doc, l);
2716 function moveOnce(boundToLine) {
2717 var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
2719 if (!boundToLine && findNextLine()) {
2720 if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
2721 else ch = dir < 0 ? lineObj.text.length : 0;
2722 } else return (possible = false);
2727 if (unit == "char") moveOnce();
2728 else if (unit == "column") moveOnce(true);
2729 else if (unit == "word" || unit == "group") {
2730 var sawType = null, group = unit == "group";
2731 for (var first = true;; first = false) {
2732 if (dir < 0 && !moveOnce(!first)) break;
2733 var cur = lineObj.text.charAt(ch) || "\n";
2734 var type = isWordChar(cur) ? "w"
2736 : /\s/.test(cur) ? null
2738 if (sawType && sawType != type) {
2739 if (dir < 0) {dir = 1; moveOnce();}
2742 if (type) sawType = type;
2743 if (dir > 0 && !moveOnce(!first)) break;
2746 var result = skipAtomic(doc, Pos(line, ch), origDir, true);
2747 if (!possible) result.hitSide = true;
2751 function findPosV(cm, pos, dir, unit) {
2752 var doc = cm.doc, x = pos.left, y;
2753 if (unit == "page") {
2754 var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
2755 y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
2756 } else if (unit == "line") {
2757 y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
2760 var target = coordsChar(cm, x, y);
2761 if (!target.outside) break;
2762 if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
2768 function findWordAt(line, pos) {
2769 var start = pos.ch, end = pos.ch;
2771 if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
2772 var startChar = line.charAt(start);
2773 var check = isWordChar(startChar) ? isWordChar
2774 : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
2775 : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
2776 while (start > 0 && check(line.charAt(start - 1))) --start;
2777 while (end < line.length && check(line.charAt(end))) ++end;
2779 return {from: Pos(pos.line, start), to: Pos(pos.line, end)};
2782 function selectLine(cm, line) {
2783 extendSelection(cm.doc, Pos(line, 0), clipPos(cm.doc, Pos(line + 1, 0)));
2788 // The publicly visible API. Note that operation(null, f) means
2789 // 'wrap f in an operation, performed on its `this` parameter'
2791 CodeMirror.prototype = {
2792 constructor: CodeMirror,
2793 focus: function(){window.focus(); focusInput(this); onFocus(this); fastPoll(this);},
2795 setOption: function(option, value) {
2796 var options = this.options, old = options[option];
2797 if (options[option] == value && option != "mode") return;
2798 options[option] = value;
2799 if (optionHandlers.hasOwnProperty(option))
2800 operation(this, optionHandlers[option])(this, value, old);
2803 getOption: function(option) {return this.options[option];},
2804 getDoc: function() {return this.doc;},
2806 addKeyMap: function(map, bottom) {
2807 this.state.keyMaps[bottom ? "push" : "unshift"](map);
2809 removeKeyMap: function(map) {
2810 var maps = this.state.keyMaps;
2811 for (var i = 0; i < maps.length; ++i)
2812 if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map)) {
2818 addOverlay: operation(null, function(spec, options) {
2819 var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
2820 if (mode.startState) throw new Error("Overlays may not be stateful.");
2821 this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
2822 this.state.modeGen++;
2825 removeOverlay: operation(null, function(spec) {
2826 var overlays = this.state.overlays;
2827 for (var i = 0; i < overlays.length; ++i) {
2828 var cur = overlays[i].modeSpec;
2829 if (cur == spec || typeof spec == "string" && cur.name == spec) {
2830 overlays.splice(i, 1);
2831 this.state.modeGen++;
2838 indentLine: operation(null, function(n, dir, aggressive) {
2839 if (typeof dir != "string" && typeof dir != "number") {
2840 if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
2841 else dir = dir ? "add" : "subtract";
2843 if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
2845 indentSelection: operation(null, function(how) {
2846 var sel = this.doc.sel;
2847 if (posEq(sel.from, sel.to)) return indentLine(this, sel.from.line, how);
2848 var e = sel.to.line - (sel.to.ch ? 0 : 1);
2849 for (var i = sel.from.line; i <= e; ++i) indentLine(this, i, how);
2852 // Fetch the parser token for a given character. Useful for hacks
2853 // that want to inspect the mode state (say, for completion).
2854 getTokenAt: function(pos, precise) {
2856 pos = clipPos(doc, pos);
2857 var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode;
2858 var line = getLine(doc, pos.line);
2859 var stream = new StringStream(line.text, this.options.tabSize);
2860 while (stream.pos < pos.ch && !stream.eol()) {
2861 stream.start = stream.pos;
2862 var style = mode.token(stream, state);
2864 return {start: stream.start,
2866 string: stream.current(),
2867 className: style || null, // Deprecated, use 'type' instead
2868 type: style || null,
2872 getTokenTypeAt: function(pos) {
2873 pos = clipPos(this.doc, pos);
2874 var styles = getLineStyles(this, getLine(this.doc, pos.line));
2875 var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
2876 if (ch == 0) return styles[2];
2878 var mid = (before + after) >> 1;
2879 if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
2880 else if (styles[mid * 2 + 1] < ch) before = mid + 1;
2881 else return styles[mid * 2 + 2];
2885 getModeAt: function(pos) {
2886 var mode = this.doc.mode;
2887 if (!mode.innerMode) return mode;
2888 return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
2891 getHelper: function(pos, type) {
2892 if (!helpers.hasOwnProperty(type)) return;
2893 var help = helpers[type], mode = this.getModeAt(pos);
2894 return mode[type] && help[mode[type]] ||
2895 mode.helperType && help[mode.helperType] ||
2899 getStateAfter: function(line, precise) {
2901 line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
2902 return getStateBefore(this, line + 1, precise);
2905 cursorCoords: function(start, mode) {
2906 var pos, sel = this.doc.sel;
2907 if (start == null) pos = sel.head;
2908 else if (typeof start == "object") pos = clipPos(this.doc, start);
2909 else pos = start ? sel.from : sel.to;
2910 return cursorCoords(this, pos, mode || "page");
2913 charCoords: function(pos, mode) {
2914 return charCoords(this, clipPos(this.doc, pos), mode || "page");
2917 coordsChar: function(coords, mode) {
2918 coords = fromCoordSystem(this, coords, mode || "page");
2919 return coordsChar(this, coords.left, coords.top);
2922 lineAtHeight: function(height, mode) {
2923 height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
2924 return lineAtHeight(this.doc, height + this.display.viewOffset);
2926 heightAtLine: function(line, mode) {
2927 var end = false, last = this.doc.first + this.doc.size - 1;
2928 if (line < this.doc.first) line = this.doc.first;
2929 else if (line > last) { line = last; end = true; }
2930 var lineObj = getLine(this.doc, line);
2931 return intoCoordSystem(this, getLine(this.doc, line), {top: 0, left: 0}, mode || "page").top +
2932 (end ? lineObj.height : 0);
2935 defaultTextHeight: function() { return textHeight(this.display); },
2936 defaultCharWidth: function() { return charWidth(this.display); },
2938 setGutterMarker: operation(null, function(line, gutterID, value) {
2939 return changeLine(this, line, function(line) {
2940 var markers = line.gutterMarkers || (line.gutterMarkers = {});
2941 markers[gutterID] = value;
2942 if (!value && isEmpty(markers)) line.gutterMarkers = null;
2947 clearGutter: operation(null, function(gutterID) {
2948 var cm = this, doc = cm.doc, i = doc.first;
2949 doc.iter(function(line) {
2950 if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
2951 line.gutterMarkers[gutterID] = null;
2952 regChange(cm, i, i + 1);
2953 if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
2959 addLineClass: operation(null, function(handle, where, cls) {
2960 return changeLine(this, handle, function(line) {
2961 var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
2962 if (!line[prop]) line[prop] = cls;
2963 else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) return false;
2964 else line[prop] += " " + cls;
2969 removeLineClass: operation(null, function(handle, where, cls) {
2970 return changeLine(this, handle, function(line) {
2971 var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
2972 var cur = line[prop];
2973 if (!cur) return false;
2974 else if (cls == null) line[prop] = null;
2976 var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)"));
2977 if (!found) return false;
2978 var end = found.index + found[0].length;
2979 line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
2985 addLineWidget: operation(null, function(handle, node, options) {
2986 return addLineWidget(this, handle, node, options);
2989 removeLineWidget: function(widget) { widget.clear(); },
2991 lineInfo: function(line) {
2992 if (typeof line == "number") {
2993 if (!isLine(this.doc, line)) return null;
2995 line = getLine(this.doc, line);
2996 if (!line) return null;
2998 var n = lineNo(line);
2999 if (n == null) return null;
3001 return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
3002 textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
3003 widgets: line.widgets};
3006 getViewport: function() { return {from: this.display.showingFrom, to: this.display.showingTo};},
3008 addWidget: function(pos, node, scroll, vert, horiz) {
3009 var display = this.display;
3010 pos = cursorCoords(this, clipPos(this.doc, pos));
3011 var top = pos.bottom, left = pos.left;
3012 node.style.position = "absolute";
3013 display.sizer.appendChild(node);
3014 if (vert == "over") {
3016 } else if (vert == "above" || vert == "near") {
3017 var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
3018 hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
3019 // Default to positioning above (if specified and possible); otherwise default to positioning below
3020 if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
3021 top = pos.top - node.offsetHeight;
3022 else if (pos.bottom + node.offsetHeight <= vspace)
3024 if (left + node.offsetWidth > hspace)
3025 left = hspace - node.offsetWidth;
3027 node.style.top = top + "px";
3028 node.style.left = node.style.right = "";
3029 if (horiz == "right") {
3030 left = display.sizer.clientWidth - node.offsetWidth;
3031 node.style.right = "0px";
3033 if (horiz == "left") left = 0;
3034 else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
3035 node.style.left = left + "px";
3038 scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
3041 triggerOnKeyDown: operation(null, onKeyDown),
3043 execCommand: function(cmd) {return commands[cmd](this);},
3045 findPosH: function(from, amount, unit, visually) {
3047 if (amount < 0) { dir = -1; amount = -amount; }
3048 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
3049 cur = findPosH(this.doc, cur, dir, unit, visually);
3050 if (cur.hitSide) break;
3055 moveH: operation(null, function(dir, unit) {
3056 var sel = this.doc.sel, pos;
3057 if (sel.shift || sel.extend || posEq(sel.from, sel.to))
3058 pos = findPosH(this.doc, sel.head, dir, unit, this.options.rtlMoveVisually);
3060 pos = dir < 0 ? sel.from : sel.to;
3061 extendSelection(this.doc, pos, pos, dir);
3064 deleteH: operation(null, function(dir, unit) {
3065 var sel = this.doc.sel;
3066 if (!posEq(sel.from, sel.to)) replaceRange(this.doc, "", sel.from, sel.to, "+delete");
3067 else replaceRange(this.doc, "", sel.from, findPosH(this.doc, sel.head, dir, unit, false), "+delete");
3068 this.curOp.userSelChange = true;
3071 findPosV: function(from, amount, unit, goalColumn) {
3072 var dir = 1, x = goalColumn;
3073 if (amount < 0) { dir = -1; amount = -amount; }
3074 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
3075 var coords = cursorCoords(this, cur, "div");
3076 if (x == null) x = coords.left;
3077 else coords.left = x;
3078 cur = findPosV(this, coords, dir, unit);
3079 if (cur.hitSide) break;
3084 moveV: operation(null, function(dir, unit) {
3085 var sel = this.doc.sel;
3086 var pos = cursorCoords(this, sel.head, "div");
3087 if (sel.goalColumn != null) pos.left = sel.goalColumn;
3088 var target = findPosV(this, pos, dir, unit);
3090 if (unit == "page") addToScrollPos(this, 0, charCoords(this, target, "div").top - pos.top);
3091 extendSelection(this.doc, target, target, dir);
3092 sel.goalColumn = pos.left;
3095 toggleOverwrite: function(value) {
3096 if (value != null && value == this.state.overwrite) return;
3097 if (this.state.overwrite = !this.state.overwrite)
3098 this.display.cursor.className += " CodeMirror-overwrite";
3100 this.display.cursor.className = this.display.cursor.className.replace(" CodeMirror-overwrite", "");
3102 hasFocus: function() { return this.state.focused; },
3104 scrollTo: operation(null, function(x, y) {
3105 updateScrollPos(this, x, y);
3107 getScrollInfo: function() {
3108 var scroller = this.display.scroller, co = scrollerCutOff;
3109 return {left: scroller.scrollLeft, top: scroller.scrollTop,
3110 height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
3111 clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co};
3114 scrollIntoView: operation(null, function(pos, margin) {
3115 if (typeof pos == "number") pos = Pos(pos, 0);
3116 if (!margin) margin = 0;
3119 if (!pos || pos.line != null) {
3120 this.curOp.scrollToPos = pos ? clipPos(this.doc, pos) : this.doc.sel.head;
3121 this.curOp.scrollToPosMargin = margin;
3122 coords = cursorCoords(this, this.curOp.scrollToPos);
3124 var sPos = calculateScrollPos(this, coords.left, coords.top - margin, coords.right, coords.bottom + margin);
3125 updateScrollPos(this, sPos.scrollLeft, sPos.scrollTop);
3128 setSize: operation(null, function(width, height) {
3129 function interpret(val) {
3130 return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
3132 if (width != null) this.display.wrapper.style.width = interpret(width);
3133 if (height != null) this.display.wrapper.style.height = interpret(height);
3134 if (this.options.lineWrapping)
3135 this.display.measureLineCache.length = this.display.measureLineCachePos = 0;
3136 this.curOp.forceUpdate = true;
3139 operation: function(f){return runInOp(this, f);},
3141 refresh: operation(null, function() {
3143 updateScrollPos(this, this.doc.scrollLeft, this.doc.scrollTop);
3147 swapDoc: operation(null, function(doc) {
3150 attachDoc(this, doc);
3152 resetInput(this, true);
3153 updateScrollPos(this, doc.scrollLeft, doc.scrollTop);
3157 getInputField: function(){return this.display.input;},
3158 getWrapperElement: function(){return this.display.wrapper;},
3159 getScrollerElement: function(){return this.display.scroller;},
3160 getGutterElement: function(){return this.display.gutters;}
3162 eventMixin(CodeMirror);
3166 var optionHandlers = CodeMirror.optionHandlers = {};
3168 // The default configuration options.
3169 var defaults = CodeMirror.defaults = {};
3171 function option(name, deflt, handle, notOnInit) {
3172 CodeMirror.defaults[name] = deflt;
3173 if (handle) optionHandlers[name] =
3174 notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
3177 var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
3179 // These two are, on init, called from the constructor because they
3180 // have to be initialized before the editor can start at all.
3181 option("value", "", function(cm, val) {
3184 option("mode", null, function(cm, val) {
3185 cm.doc.modeOption = val;
3189 option("indentUnit", 2, loadMode, true);
3190 option("indentWithTabs", false);
3191 option("smartIndent", true);
3192 option("tabSize", 4, function(cm) {
3197 option("electricChars", true);
3198 option("rtlMoveVisually", !windows);
3200 option("theme", "default", function(cm) {
3204 option("keyMap", "default", keyMapChanged);
3205 option("extraKeys", null);
3207 option("onKeyEvent", null);
3208 option("onDragEvent", null);
3210 option("lineWrapping", false, wrappingChanged, true);
3211 option("gutters", [], function(cm) {
3212 setGuttersForLineNumbers(cm.options);
3215 option("fixedGutter", true, function(cm, val) {
3216 cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
3219 option("coverGutterNextToScrollbar", false, updateScrollbars, true);
3220 option("lineNumbers", false, function(cm) {
3221 setGuttersForLineNumbers(cm.options);
3224 option("firstLineNumber", 1, guttersChanged, true);
3225 option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
3226 option("showCursorWhenSelecting", false, updateSelection, true);
3228 option("readOnly", false, function(cm, val) {
3229 if (val == "nocursor") {onBlur(cm); cm.display.input.blur();}
3230 else if (!val) resetInput(cm, true);
3232 option("dragDrop", true);
3234 option("cursorBlinkRate", 530);
3235 option("cursorScrollMargin", 0);
3236 option("cursorHeight", 1);
3237 option("workTime", 100);
3238 option("workDelay", 100);
3239 option("flattenSpans", true);
3240 option("pollInterval", 100);
3241 option("undoDepth", 40, function(cm, val){cm.doc.history.undoDepth = val;});
3242 option("historyEventDelay", 500);
3243 option("viewportMargin", 10, function(cm){cm.refresh();}, true);
3244 option("maxHighlightLength", 10000, function(cm){loadMode(cm); cm.refresh();}, true);
3245 option("moveInputWithCursor", true, function(cm, val) {
3246 if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0;
3249 option("tabindex", null, function(cm, val) {
3250 cm.display.input.tabIndex = val || "";
3252 option("autofocus", null);
3254 // MODE DEFINITION AND QUERYING
3256 // Known modes, by name and by MIME
3257 var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
3259 CodeMirror.defineMode = function(name, mode) {
3260 if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
3261 if (arguments.length > 2) {
3262 mode.dependencies = [];
3263 for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]);
3268 CodeMirror.defineMIME = function(mime, spec) {
3269 mimeModes[mime] = spec;
3272 CodeMirror.resolveMode = function(spec) {
3273 if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
3274 spec = mimeModes[spec];
3275 } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
3276 var found = mimeModes[spec.name];
3277 spec = createObj(found, spec);
3278 spec.name = found.name;
3279 } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
3280 return CodeMirror.resolveMode("application/xml");
3282 if (typeof spec == "string") return {name: spec};
3283 else return spec || {name: "null"};
3286 CodeMirror.getMode = function(options, spec) {
3287 var spec = CodeMirror.resolveMode(spec);
3288 var mfactory = modes[spec.name];
3289 if (!mfactory) return CodeMirror.getMode(options, "text/plain");
3290 var modeObj = mfactory(options, spec);
3291 if (modeExtensions.hasOwnProperty(spec.name)) {
3292 var exts = modeExtensions[spec.name];
3293 for (var prop in exts) {
3294 if (!exts.hasOwnProperty(prop)) continue;
3295 if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
3296 modeObj[prop] = exts[prop];
3299 modeObj.name = spec.name;
3304 CodeMirror.defineMode("null", function() {
3305 return {token: function(stream) {stream.skipToEnd();}};
3307 CodeMirror.defineMIME("text/plain", "null");
3309 var modeExtensions = CodeMirror.modeExtensions = {};
3310 CodeMirror.extendMode = function(mode, properties) {
3311 var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
3312 copyObj(properties, exts);
3317 CodeMirror.defineExtension = function(name, func) {
3318 CodeMirror.prototype[name] = func;
3320 CodeMirror.defineDocExtension = function(name, func) {
3321 Doc.prototype[name] = func;
3323 CodeMirror.defineOption = option;
3326 CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
3328 var helpers = CodeMirror.helpers = {};
3329 CodeMirror.registerHelper = function(type, name, value) {
3330 if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {};
3331 helpers[type][name] = value;
3336 CodeMirror.isWordChar = isWordChar;
3338 // MODE STATE HANDLING
3340 // Utility functions for working with state. Exported because modes
3341 // sometimes need to do this.
3342 function copyState(mode, state) {
3343 if (state === true) return state;
3344 if (mode.copyState) return mode.copyState(state);
3346 for (var n in state) {
3348 if (val instanceof Array) val = val.concat([]);
3353 CodeMirror.copyState = copyState;
3355 function startState(mode, a1, a2) {
3356 return mode.startState ? mode.startState(a1, a2) : true;
3358 CodeMirror.startState = startState;
3360 CodeMirror.innerMode = function(mode, state) {
3361 while (mode.innerMode) {
3362 var info = mode.innerMode(state);
3363 if (!info || info.mode == mode) break;
3367 return info || {mode: mode, state: state};
3370 // STANDARD COMMANDS
3372 var commands = CodeMirror.commands = {
3373 selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()));},
3374 killLine: function(cm) {
3375 var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
3376 if (!sel && cm.getLine(from.line).length == from.ch)
3377 cm.replaceRange("", from, Pos(from.line + 1, 0), "+delete");
3378 else cm.replaceRange("", from, sel ? to : Pos(from.line), "+delete");
3380 deleteLine: function(cm) {
3381 var l = cm.getCursor().line;
3382 cm.replaceRange("", Pos(l, 0), Pos(l), "+delete");
3384 delLineLeft: function(cm) {
3385 var cur = cm.getCursor();
3386 cm.replaceRange("", Pos(cur.line, 0), cur, "+delete");
3388 undo: function(cm) {cm.undo();},
3389 redo: function(cm) {cm.redo();},
3390 goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
3391 goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
3392 goLineStart: function(cm) {
3393 cm.extendSelection(lineStart(cm, cm.getCursor().line));
3395 goLineStartSmart: function(cm) {
3396 var cur = cm.getCursor(), start = lineStart(cm, cur.line);
3397 var line = cm.getLineHandle(start.line);
3398 var order = getOrder(line);
3399 if (!order || order[0].level == 0) {
3400 var firstNonWS = Math.max(0, line.text.search(/\S/));
3401 var inWS = cur.line == start.line && cur.ch <= firstNonWS && cur.ch;
3402 cm.extendSelection(Pos(start.line, inWS ? 0 : firstNonWS));
3403 } else cm.extendSelection(start);
3405 goLineEnd: function(cm) {
3406 cm.extendSelection(lineEnd(cm, cm.getCursor().line));
3408 goLineRight: function(cm) {
3409 var top = cm.charCoords(cm.getCursor(), "div").top + 5;
3410 cm.extendSelection(cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div"));
3412 goLineLeft: function(cm) {
3413 var top = cm.charCoords(cm.getCursor(), "div").top + 5;
3414 cm.extendSelection(cm.coordsChar({left: 0, top: top}, "div"));
3416 goLineUp: function(cm) {cm.moveV(-1, "line");},
3417 goLineDown: function(cm) {cm.moveV(1, "line");},
3418 goPageUp: function(cm) {cm.moveV(-1, "page");},
3419 goPageDown: function(cm) {cm.moveV(1, "page");},
3420 goCharLeft: function(cm) {cm.moveH(-1, "char");},
3421 goCharRight: function(cm) {cm.moveH(1, "char");},
3422 goColumnLeft: function(cm) {cm.moveH(-1, "column");},
3423 goColumnRight: function(cm) {cm.moveH(1, "column");},
3424 goWordLeft: function(cm) {cm.moveH(-1, "word");},
3425 goGroupRight: function(cm) {cm.moveH(1, "group");},
3426 goGroupLeft: function(cm) {cm.moveH(-1, "group");},
3427 goWordRight: function(cm) {cm.moveH(1, "word");},
3428 delCharBefore: function(cm) {cm.deleteH(-1, "char");},
3429 delCharAfter: function(cm) {cm.deleteH(1, "char");},
3430 delWordBefore: function(cm) {cm.deleteH(-1, "word");},
3431 delWordAfter: function(cm) {cm.deleteH(1, "word");},
3432 delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
3433 delGroupAfter: function(cm) {cm.deleteH(1, "group");},
3434 indentAuto: function(cm) {cm.indentSelection("smart");},
3435 indentMore: function(cm) {cm.indentSelection("add");},
3436 indentLess: function(cm) {cm.indentSelection("subtract");},
3437 insertTab: function(cm) {cm.replaceSelection("\t", "end", "+input");},
3438 defaultTab: function(cm) {
3439 if (cm.somethingSelected()) cm.indentSelection("add");
3440 else cm.replaceSelection("\t", "end", "+input");
3442 transposeChars: function(cm) {
3443 var cur = cm.getCursor(), line = cm.getLine(cur.line);
3444 if (cur.ch > 0 && cur.ch < line.length - 1)
3445 cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
3446 Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
3448 newlineAndIndent: function(cm) {
3449 operation(cm, function() {
3450 cm.replaceSelection("\n", "end", "+input");
3451 cm.indentLine(cm.getCursor().line, null, true);
3454 toggleOverwrite: function(cm) {cm.toggleOverwrite();}
3459 var keyMap = CodeMirror.keyMap = {};
3461 "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
3462 "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
3463 "Delete": "delCharAfter", "Backspace": "delCharBefore", "Tab": "defaultTab", "Shift-Tab": "indentAuto",
3464 "Enter": "newlineAndIndent", "Insert": "toggleOverwrite"
3466 // Note that the save and find-related commands aren't defined by
3467 // default. Unknown commands are simply ignored.
3468 keyMap.pcDefault = {
3469 "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
3470 "Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
3471 "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
3472 "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
3473 "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
3474 "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
3475 fallthrough: "basic"
3477 keyMap.macDefault = {
3478 "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
3479 "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
3480 "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delGroupBefore",
3481 "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
3482 "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
3483 "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft",
3484 fallthrough: ["basic", "emacsy"]
3486 keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
3488 "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
3489 "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
3490 "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
3491 "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
3496 function getKeyMap(val) {
3497 if (typeof val == "string") return keyMap[val];
3501 function lookupKey(name, maps, handle) {
3502 function lookup(map) {
3503 map = getKeyMap(map);
3504 var found = map[name];
3505 if (found === false) return "stop";
3506 if (found != null && handle(found)) return true;
3507 if (map.nofallthrough) return "stop";
3509 var fallthrough = map.fallthrough;
3510 if (fallthrough == null) return false;
3511 if (Object.prototype.toString.call(fallthrough) != "[object Array]")
3512 return lookup(fallthrough);
3513 for (var i = 0, e = fallthrough.length; i < e; ++i) {
3514 var done = lookup(fallthrough[i]);
3515 if (done) return done;
3520 for (var i = 0; i < maps.length; ++i) {
3521 var done = lookup(maps[i]);
3522 if (done) return done != "stop";
3525 function isModifierKey(event) {
3526 var name = keyNames[event.keyCode];
3527 return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
3529 function keyName(event, noShift) {
3530 if (opera && event.keyCode == 34 && event["char"]) return false;
3531 var name = keyNames[event.keyCode];
3532 if (name == null || event.altGraphKey) return false;
3533 if (event.altKey) name = "Alt-" + name;
3534 if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name;
3535 if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name;
3536 if (!noShift && event.shiftKey) name = "Shift-" + name;
3539 CodeMirror.lookupKey = lookupKey;
3540 CodeMirror.isModifierKey = isModifierKey;
3541 CodeMirror.keyName = keyName;
3545 CodeMirror.fromTextArea = function(textarea, options) {
3546 if (!options) options = {};
3547 options.value = textarea.value;
3548 if (!options.tabindex && textarea.tabindex)
3549 options.tabindex = textarea.tabindex;
3550 if (!options.placeholder && textarea.placeholder)
3551 options.placeholder = textarea.placeholder;
3552 // Set autofocus to true if this textarea is focused, or if it has
3553 // autofocus and no other element is focused.
3554 if (options.autofocus == null) {
3555 var hasFocus = document.body;
3556 // doc.activeElement occasionally throws on IE
3557 try { hasFocus = document.activeElement; } catch(e) {}
3558 options.autofocus = hasFocus == textarea ||
3559 textarea.getAttribute("autofocus") != null && hasFocus == document.body;
3562 function save() {textarea.value = cm.getValue();}
3563 if (textarea.form) {
3564 on(textarea.form, "submit", save);
3565 // Deplorable hack to make the submit method do the right thing.
3566 if (!options.leaveSubmitMethodAlone) {
3567 var form = textarea.form, realSubmit = form.submit;
3569 var wrappedSubmit = form.submit = function() {
3571 form.submit = realSubmit;
3573 form.submit = wrappedSubmit;
3579 textarea.style.display = "none";
3580 var cm = CodeMirror(function(node) {
3581 textarea.parentNode.insertBefore(node, textarea.nextSibling);
3584 cm.getTextArea = function() { return textarea; };
3585 cm.toTextArea = function() {
3587 textarea.parentNode.removeChild(cm.getWrapperElement());
3588 textarea.style.display = "";
3589 if (textarea.form) {
3590 off(textarea.form, "submit", save);
3591 if (typeof textarea.form.submit == "function")
3592 textarea.form.submit = realSubmit;
3600 // Fed to the mode parsers, provides helper functions to make
3601 // parsers more succinct.
3603 // The character stream used by a mode's parser.
3604 function StringStream(string, tabSize) {
3605 this.pos = this.start = 0;
3606 this.string = string;
3607 this.tabSize = tabSize || 8;
3608 this.lastColumnPos = this.lastColumnValue = 0;
3611 StringStream.prototype = {
3612 eol: function() {return this.pos >= this.string.length;},
3613 sol: function() {return this.pos == 0;},
3614 peek: function() {return this.string.charAt(this.pos) || undefined;},
3616 if (this.pos < this.string.length)
3617 return this.string.charAt(this.pos++);
3619 eat: function(match) {
3620 var ch = this.string.charAt(this.pos);
3621 if (typeof match == "string") var ok = ch == match;
3622 else var ok = ch && (match.test ? match.test(ch) : match(ch));
3623 if (ok) {++this.pos; return ch;}
3625 eatWhile: function(match) {
3626 var start = this.pos;
3627 while (this.eat(match)){}
3628 return this.pos > start;
3630 eatSpace: function() {
3631 var start = this.pos;
3632 while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
3633 return this.pos > start;
3635 skipToEnd: function() {this.pos = this.string.length;},
3636 skipTo: function(ch) {
3637 var found = this.string.indexOf(ch, this.pos);
3638 if (found > -1) {this.pos = found; return true;}
3640 backUp: function(n) {this.pos -= n;},
3641 column: function() {
3642 if (this.lastColumnPos < this.start) {
3643 this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
3644 this.lastColumnPos = this.start;
3646 return this.lastColumnValue;
3648 indentation: function() {return countColumn(this.string, null, this.tabSize);},
3649 match: function(pattern, consume, caseInsensitive) {
3650 if (typeof pattern == "string") {
3651 var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
3652 var substr = this.string.substr(this.pos, pattern.length);
3653 if (cased(substr) == cased(pattern)) {
3654 if (consume !== false) this.pos += pattern.length;
3658 var match = this.string.slice(this.pos).match(pattern);
3659 if (match && match.index > 0) return null;
3660 if (match && consume !== false) this.pos += match[0].length;
3664 current: function(){return this.string.slice(this.start, this.pos);}
3666 CodeMirror.StringStream = StringStream;
3670 function TextMarker(doc, type) {
3675 CodeMirror.TextMarker = TextMarker;
3676 eventMixin(TextMarker);
3678 TextMarker.prototype.clear = function() {
3679 if (this.explicitlyCleared) return;
3680 var cm = this.doc.cm, withOp = cm && !cm.curOp;
3681 if (withOp) startOperation(cm);
3682 if (hasHandler(this, "clear")) {
3683 var found = this.find();
3684 if (found) signalLater(this, "clear", found.from, found.to);
3686 var min = null, max = null;
3687 for (var i = 0; i < this.lines.length; ++i) {
3688 var line = this.lines[i];
3689 var span = getMarkedSpanFor(line.markedSpans, this);
3690 if (span.to != null) max = lineNo(line);
3691 line.markedSpans = removeMarkedSpan(line.markedSpans, span);
3692 if (span.from != null)
3694 else if (this.collapsed && !lineIsHidden(this.doc, line) && cm)
3695 updateLineHeight(line, textHeight(cm.display));
3697 if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
3698 var visual = visualLine(cm.doc, this.lines[i]), len = lineLength(cm.doc, visual);
3699 if (len > cm.display.maxLineLength) {
3700 cm.display.maxLine = visual;
3701 cm.display.maxLineLength = len;
3702 cm.display.maxLineChanged = true;
3706 if (min != null && cm) regChange(cm, min, max + 1);
3707 this.lines.length = 0;
3708 this.explicitlyCleared = true;
3709 if (this.atomic && this.doc.cantEdit) {
3710 this.doc.cantEdit = false;
3711 if (cm) reCheckSelection(cm);
3713 if (withOp) endOperation(cm);
3716 TextMarker.prototype.find = function() {
3718 for (var i = 0; i < this.lines.length; ++i) {
3719 var line = this.lines[i];
3720 var span = getMarkedSpanFor(line.markedSpans, this);
3721 if (span.from != null || span.to != null) {
3722 var found = lineNo(line);
3723 if (span.from != null) from = Pos(found, span.from);
3724 if (span.to != null) to = Pos(found, span.to);
3727 if (this.type == "bookmark") return from;
3728 return from && {from: from, to: to};
3731 TextMarker.prototype.changed = function() {
3732 var pos = this.find(), cm = this.doc.cm;
3733 if (!pos || !cm) return;
3734 var line = getLine(this.doc, pos.from.line);
3735 clearCachedMeasurement(cm, line);
3736 if (pos.from.line >= cm.display.showingFrom && pos.from.line < cm.display.showingTo) {
3737 for (var node = cm.display.lineDiv.firstChild; node; node = node.nextSibling) if (node.lineObj == line) {
3738 if (node.offsetHeight != line.height) updateLineHeight(line, node.offsetHeight);
3741 runInOp(cm, function() {
3742 cm.curOp.selectionChanged = cm.curOp.forceUpdate = cm.curOp.updateMaxLine = true;
3747 TextMarker.prototype.attachLine = function(line) {
3748 if (!this.lines.length && this.doc.cm) {
3749 var op = this.doc.cm.curOp;
3750 if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
3751 (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
3753 this.lines.push(line);
3755 TextMarker.prototype.detachLine = function(line) {
3756 this.lines.splice(indexOf(this.lines, line), 1);
3757 if (!this.lines.length && this.doc.cm) {
3758 var op = this.doc.cm.curOp;
3759 (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
3763 function markText(doc, from, to, options, type) {
3764 if (options && options.shared) return markTextShared(doc, from, to, options, type);
3765 if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);
3767 var marker = new TextMarker(doc, type);
3768 if (type == "range" && !posLess(from, to)) return marker;
3769 if (options) copyObj(options, marker);
3770 if (marker.replacedWith) {
3771 marker.collapsed = true;
3772 marker.replacedWith = elt("span", [marker.replacedWith], "CodeMirror-widget");
3773 if (!options.handleMouseEvents) marker.replacedWith.ignoreEvents = true;
3775 if (marker.collapsed) sawCollapsedSpans = true;
3777 if (marker.addToHistory)
3778 addToHistory(doc, {from: from, to: to, origin: "markText"},
3779 {head: doc.sel.head, anchor: doc.sel.anchor}, NaN);
3781 var curLine = from.line, size = 0, collapsedAtStart, collapsedAtEnd, cm = doc.cm, updateMaxLine;
3782 doc.iter(curLine, to.line + 1, function(line) {
3783 if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(doc, line) == cm.display.maxLine)
3784 updateMaxLine = true;
3785 var span = {from: null, to: null, marker: marker};
3786 size += line.text.length;
3787 if (curLine == from.line) {span.from = from.ch; size -= from.ch;}
3788 if (curLine == to.line) {span.to = to.ch; size -= line.text.length - to.ch;}
3789 if (marker.collapsed) {
3790 if (curLine == to.line) collapsedAtEnd = collapsedSpanAt(line, to.ch);
3791 if (curLine == from.line) collapsedAtStart = collapsedSpanAt(line, from.ch);
3792 else updateLineHeight(line, 0);
3794 addMarkedSpan(line, span);
3797 if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
3798 if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
3801 if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
3803 if (marker.readOnly) {
3804 sawReadOnlySpans = true;
3805 if (doc.history.done.length || doc.history.undone.length)
3808 if (marker.collapsed) {
3809 if (collapsedAtStart != collapsedAtEnd)
3810 throw new Error("Inserting collapsed marker overlapping an existing one");
3812 marker.atomic = true;
3815 if (updateMaxLine) cm.curOp.updateMaxLine = true;
3816 if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.collapsed)
3817 regChange(cm, from.line, to.line + 1);
3818 if (marker.atomic) reCheckSelection(cm);
3823 // SHARED TEXTMARKERS
3825 function SharedTextMarker(markers, primary) {
3826 this.markers = markers;
3827 this.primary = primary;
3828 for (var i = 0, me = this; i < markers.length; ++i) {
3829 markers[i].parent = this;
3830 on(markers[i], "clear", function(){me.clear();});
3833 CodeMirror.SharedTextMarker = SharedTextMarker;
3834 eventMixin(SharedTextMarker);
3836 SharedTextMarker.prototype.clear = function() {
3837 if (this.explicitlyCleared) return;
3838 this.explicitlyCleared = true;
3839 for (var i = 0; i < this.markers.length; ++i)
3840 this.markers[i].clear();
3841 signalLater(this, "clear");
3843 SharedTextMarker.prototype.find = function() {
3844 return this.primary.find();
3847 function markTextShared(doc, from, to, options, type) {
3848 options = copyObj(options);
3849 options.shared = false;
3850 var markers = [markText(doc, from, to, options, type)], primary = markers[0];
3851 var widget = options.replacedWith;
3852 linkedDocs(doc, function(doc) {
3853 if (widget) options.replacedWith = widget.cloneNode(true);
3854 markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
3855 for (var i = 0; i < doc.linked.length; ++i)
3856 if (doc.linked[i].isParent) return;
3857 primary = lst(markers);
3859 return new SharedTextMarker(markers, primary);
3864 function getMarkedSpanFor(spans, marker) {
3865 if (spans) for (var i = 0; i < spans.length; ++i) {
3866 var span = spans[i];
3867 if (span.marker == marker) return span;
3870 function removeMarkedSpan(spans, span) {
3871 for (var r, i = 0; i < spans.length; ++i)
3872 if (spans[i] != span) (r || (r = [])).push(spans[i]);
3875 function addMarkedSpan(line, span) {
3876 line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
3877 span.marker.attachLine(line);
3880 function markedSpansBefore(old, startCh, isInsert) {
3881 if (old) for (var i = 0, nw; i < old.length; ++i) {
3882 var span = old[i], marker = span.marker;
3883 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
3884 if (startsBefore || marker.type == "bookmark" && span.from == startCh && (!isInsert || !span.marker.insertLeft)) {
3885 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
3886 (nw || (nw = [])).push({from: span.from,
3887 to: endsAfter ? null : span.to,
3894 function markedSpansAfter(old, endCh, isInsert) {
3895 if (old) for (var i = 0, nw; i < old.length; ++i) {
3896 var span = old[i], marker = span.marker;
3897 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
3898 if (endsAfter || marker.type == "bookmark" && span.from == endCh && (!isInsert || span.marker.insertLeft)) {
3899 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
3900 (nw || (nw = [])).push({from: startsBefore ? null : span.from - endCh,
3901 to: span.to == null ? null : span.to - endCh,
3908 function stretchSpansOverChange(doc, change) {
3909 var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
3910 var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
3911 if (!oldFirst && !oldLast) return null;
3913 var startCh = change.from.ch, endCh = change.to.ch, isInsert = posEq(change.from, change.to);
3914 // Get the spans that 'stick out' on both sides
3915 var first = markedSpansBefore(oldFirst, startCh, isInsert);
3916 var last = markedSpansAfter(oldLast, endCh, isInsert);
3918 // Next, merge those two ends
3919 var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
3921 // Fix up .to properties of first
3922 for (var i = 0; i < first.length; ++i) {
3923 var span = first[i];
3924 if (span.to == null) {
3925 var found = getMarkedSpanFor(last, span.marker);
3926 if (!found) span.to = startCh;
3927 else if (sameLine) span.to = found.to == null ? null : found.to + offset;
3932 // Fix up .from in last (or move them into first in case of sameLine)
3933 for (var i = 0; i < last.length; ++i) {
3935 if (span.to != null) span.to += offset;
3936 if (span.from == null) {
3937 var found = getMarkedSpanFor(first, span.marker);
3940 if (sameLine) (first || (first = [])).push(span);
3943 span.from += offset;
3944 if (sameLine) (first || (first = [])).push(span);
3948 if (sameLine && first) {
3949 // Make sure we didn't create any zero-length spans
3950 for (var i = 0; i < first.length; ++i)
3951 if (first[i].from != null && first[i].from == first[i].to && first[i].marker.type != "bookmark")
3952 first.splice(i--, 1);
3953 if (!first.length) first = null;
3956 var newMarkers = [first];
3958 // Fill gap with whole-line-spans
3959 var gap = change.text.length - 2, gapMarkers;
3960 if (gap > 0 && first)
3961 for (var i = 0; i < first.length; ++i)
3962 if (first[i].to == null)
3963 (gapMarkers || (gapMarkers = [])).push({from: null, to: null, marker: first[i].marker});
3964 for (var i = 0; i < gap; ++i)
3965 newMarkers.push(gapMarkers);
3966 newMarkers.push(last);
3971 function mergeOldSpans(doc, change) {
3972 var old = getOldSpans(doc, change);
3973 var stretched = stretchSpansOverChange(doc, change);
3974 if (!old) return stretched;
3975 if (!stretched) return old;
3977 for (var i = 0; i < old.length; ++i) {
3978 var oldCur = old[i], stretchCur = stretched[i];
3979 if (oldCur && stretchCur) {
3980 spans: for (var j = 0; j < stretchCur.length; ++j) {
3981 var span = stretchCur[j];
3982 for (var k = 0; k < oldCur.length; ++k)
3983 if (oldCur[k].marker == span.marker) continue spans;
3986 } else if (stretchCur) {
3987 old[i] = stretchCur;
3993 function removeReadOnlyRanges(doc, from, to) {
3995 doc.iter(from.line, to.line + 1, function(line) {
3996 if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
3997 var mark = line.markedSpans[i].marker;
3998 if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
3999 (markers || (markers = [])).push(mark);
4002 if (!markers) return null;
4003 var parts = [{from: from, to: to}];
4004 for (var i = 0; i < markers.length; ++i) {
4005 var mk = markers[i], m = mk.find();
4006 for (var j = 0; j < parts.length; ++j) {
4008 if (posLess(p.to, m.from) || posLess(m.to, p.from)) continue;
4009 var newParts = [j, 1];
4010 if (posLess(p.from, m.from) || !mk.inclusiveLeft && posEq(p.from, m.from))
4011 newParts.push({from: p.from, to: m.from});
4012 if (posLess(m.to, p.to) || !mk.inclusiveRight && posEq(p.to, m.to))
4013 newParts.push({from: m.to, to: p.to});
4014 parts.splice.apply(parts, newParts);
4015 j += newParts.length - 1;
4021 function collapsedSpanAt(line, ch) {
4022 var sps = sawCollapsedSpans && line.markedSpans, found;
4023 if (sps) for (var sp, i = 0; i < sps.length; ++i) {
4025 if (!sp.marker.collapsed) continue;
4026 if ((sp.from == null || sp.from < ch) &&
4027 (sp.to == null || sp.to > ch) &&
4028 (!found || found.width < sp.marker.width))
4033 function collapsedSpanAtStart(line) { return collapsedSpanAt(line, -1); }
4034 function collapsedSpanAtEnd(line) { return collapsedSpanAt(line, line.text.length + 1); }
4036 function visualLine(doc, line) {
4038 while (merged = collapsedSpanAtStart(line))
4039 line = getLine(doc, merged.find().from.line);
4043 function lineIsHidden(doc, line) {
4044 var sps = sawCollapsedSpans && line.markedSpans;
4045 if (sps) for (var sp, i = 0; i < sps.length; ++i) {
4047 if (!sp.marker.collapsed) continue;
4048 if (sp.from == null) return true;
4049 if (sp.marker.replacedWith) continue;
4050 if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
4054 function lineIsHiddenInner(doc, line, span) {
4055 if (span.to == null) {
4056 var end = span.marker.find().to, endLine = getLine(doc, end.line);
4057 return lineIsHiddenInner(doc, endLine, getMarkedSpanFor(endLine.markedSpans, span.marker));
4059 if (span.marker.inclusiveRight && span.to == line.text.length)
4061 for (var sp, i = 0; i < line.markedSpans.length; ++i) {
4062 sp = line.markedSpans[i];
4063 if (sp.marker.collapsed && !sp.marker.replacedWith && sp.from == span.to &&
4064 (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
4065 lineIsHiddenInner(doc, line, sp)) return true;
4069 function detachMarkedSpans(line) {
4070 var spans = line.markedSpans;
4072 for (var i = 0; i < spans.length; ++i)
4073 spans[i].marker.detachLine(line);
4074 line.markedSpans = null;
4077 function attachMarkedSpans(line, spans) {
4079 for (var i = 0; i < spans.length; ++i)
4080 spans[i].marker.attachLine(line);
4081 line.markedSpans = spans;
4086 var LineWidget = CodeMirror.LineWidget = function(cm, node, options) {
4087 if (options) for (var opt in options) if (options.hasOwnProperty(opt))
4088 this[opt] = options[opt];
4092 eventMixin(LineWidget);
4093 function widgetOperation(f) {
4095 var withOp = !this.cm.curOp;
4096 if (withOp) startOperation(this.cm);
4097 try {var result = f.apply(this, arguments);}
4098 finally {if (withOp) endOperation(this.cm);}
4102 LineWidget.prototype.clear = widgetOperation(function() {
4103 var ws = this.line.widgets, no = lineNo(this.line);
4104 if (no == null || !ws) return;
4105 for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
4106 if (!ws.length) this.line.widgets = null;
4107 var aboveVisible = heightAtLine(this.cm, this.line) < this.cm.doc.scrollTop;
4108 updateLineHeight(this.line, Math.max(0, this.line.height - widgetHeight(this)));
4109 if (aboveVisible) addToScrollPos(this.cm, 0, -this.height);
4110 regChange(this.cm, no, no + 1);
4112 LineWidget.prototype.changed = widgetOperation(function() {
4113 var oldH = this.height;
4115 var diff = widgetHeight(this) - oldH;
4117 updateLineHeight(this.line, this.line.height + diff);
4118 var no = lineNo(this.line);
4119 regChange(this.cm, no, no + 1);
4122 function widgetHeight(widget) {
4123 if (widget.height != null) return widget.height;
4124 if (!widget.node.parentNode || widget.node.parentNode.nodeType != 1)
4125 removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
4126 return widget.height = widget.node.offsetHeight;
4129 function addLineWidget(cm, handle, node, options) {
4130 var widget = new LineWidget(cm, node, options);
4131 if (widget.noHScroll) cm.display.alignWidgets = true;
4132 changeLine(cm, handle, function(line) {
4133 var widgets = line.widgets || (line.widgets = []);
4134 if (widget.insertAt == null) widgets.push(widget);
4135 else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
4137 if (!lineIsHidden(cm.doc, line) || widget.showIfHidden) {
4138 var aboveVisible = heightAtLine(cm, line) < cm.doc.scrollTop;
4139 updateLineHeight(line, line.height + widgetHeight(widget));
4140 if (aboveVisible) addToScrollPos(cm, 0, widget.height);
4147 // LINE DATA STRUCTURE
4149 // Line objects. These hold state related to a line, including
4150 // highlighting info (the styles array).
4151 var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
4153 attachMarkedSpans(this, markedSpans);
4154 this.height = estimateHeight ? estimateHeight(this) : 1;
4158 function updateLine(line, text, markedSpans, estimateHeight) {
4160 if (line.stateAfter) line.stateAfter = null;
4161 if (line.styles) line.styles = null;
4162 if (line.order != null) line.order = null;
4163 detachMarkedSpans(line);
4164 attachMarkedSpans(line, markedSpans);
4165 var estHeight = estimateHeight ? estimateHeight(line) : 1;
4166 if (estHeight != line.height) updateLineHeight(line, estHeight);
4169 function cleanUpLine(line) {
4171 detachMarkedSpans(line);
4174 // Run the given mode's parser over a line, update the styles
4175 // array, which contains alternating fragments of text and CSS
4177 function runMode(cm, text, mode, state, f) {
4178 var flattenSpans = mode.flattenSpans;
4179 if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
4180 var curStart = 0, curStyle = null;
4181 var stream = new StringStream(text, cm.options.tabSize), style;
4182 if (text == "" && mode.blankLine) mode.blankLine(state);
4183 while (!stream.eol()) {
4184 if (stream.pos > cm.options.maxHighlightLength) {
4185 flattenSpans = false;
4186 // Webkit seems to refuse to render text nodes longer than 57444 characters
4187 stream.pos = Math.min(text.length, stream.start + 50000);
4190 style = mode.token(stream, state);
4192 if (!flattenSpans || curStyle != style) {
4193 if (curStart < stream.start) f(stream.start, curStyle);
4194 curStart = stream.start; curStyle = style;
4196 stream.start = stream.pos;
4198 if (curStart < stream.pos) f(stream.pos, curStyle);
4201 function highlightLine(cm, line, state) {
4202 // A styles array always starts with a number identifying the
4203 // mode/overlays that it is based on (for easy invalidation).
4204 var st = [cm.state.modeGen];
4205 // Compute the base array of styles
4206 runMode(cm, line.text, cm.doc.mode, state, function(end, style) {st.push(end, style);});
4208 // Run overlays, adjust style array.
4209 for (var o = 0; o < cm.state.overlays.length; ++o) {
4210 var overlay = cm.state.overlays[o], i = 1, at = 0;
4211 runMode(cm, line.text, overlay.mode, true, function(end, style) {
4213 // Ensure there's a token end at the current position, and that i points at it
4217 st.splice(i, 1, end, st[i+1], i_end);
4219 at = Math.min(end, i_end);
4222 if (overlay.opaque) {
4223 st.splice(start, i - start, end, style);
4226 for (; start < i; start += 2) {
4227 var cur = st[start+1];
4228 st[start+1] = cur ? cur + " " + style : style;
4237 function getLineStyles(cm, line) {
4238 if (!line.styles || line.styles[0] != cm.state.modeGen)
4239 line.styles = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
4243 // Lightweight form of highlight -- proceed over this line and
4244 // update state, but don't save a style array.
4245 function processLine(cm, line, state) {
4246 var mode = cm.doc.mode;
4247 var stream = new StringStream(line.text, cm.options.tabSize);
4248 if (line.text == "" && mode.blankLine) mode.blankLine(state);
4249 while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
4250 mode.token(stream, state);
4251 stream.start = stream.pos;
4255 var styleToClassCache = {};
4256 function styleToClass(style) {
4257 if (!style) return null;
4258 return styleToClassCache[style] ||
4259 (styleToClassCache[style] = "cm-" + style.replace(/ +/g, " cm-"));
4262 function lineContent(cm, realLine, measure, copyWidgets) {
4263 var merged, line = realLine, empty = true;
4264 while (merged = collapsedSpanAtStart(line))
4265 line = getLine(cm.doc, merged.find().from.line);
4267 var builder = {pre: elt("pre"), col: 0, pos: 0,
4268 measure: null, measuredSomething: false, cm: cm,
4269 copyWidgets: copyWidgets};
4270 if (line.textClass) builder.pre.className = line.textClass;
4273 if (line.text) empty = false;
4274 builder.measure = line == realLine && measure;
4276 builder.addToken = builder.measure ? buildTokenMeasure : buildToken;
4277 if ((ie || webkit) && cm.getOption("lineWrapping"))
4278 builder.addToken = buildTokenSplitSpaces(builder.addToken);
4279 var next = insertLineContent(line, builder, getLineStyles(cm, line));
4280 if (measure && line == realLine && !builder.measuredSomething) {
4281 measure[0] = builder.pre.appendChild(zeroWidthElement(cm.display.measure));
4282 builder.measuredSomething = true;
4284 if (next) line = getLine(cm.doc, next.to.line);
4287 if (measure && !builder.measuredSomething && !measure[0])
4288 measure[0] = builder.pre.appendChild(empty ? elt("span", "\u00a0") : zeroWidthElement(cm.display.measure));
4289 if (!builder.pre.firstChild && !lineIsHidden(cm.doc, realLine))
4290 builder.pre.appendChild(document.createTextNode("\u00a0"));
4293 // Work around problem with the reported dimensions of single-char
4294 // direction spans on IE (issue #1129). See also the comment in
4296 if (measure && ie && (order = getOrder(line))) {
4297 var l = order.length - 1;
4298 if (order[l].from == order[l].to) --l;
4299 var last = order[l], prev = order[l - 1];
4300 if (last.from + 1 == last.to && prev && last.level < prev.level) {
4301 var span = measure[builder.pos - 1];
4302 if (span) span.parentNode.insertBefore(span.measureRight = zeroWidthElement(cm.display.measure),
4307 signal(cm, "renderLine", cm, realLine, builder.pre);
4311 var tokenSpecialChars = /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\uFEFF]/g;
4312 function buildToken(builder, text, style, startStyle, endStyle, title) {
4314 if (!tokenSpecialChars.test(text)) {
4315 builder.col += text.length;
4316 var content = document.createTextNode(text);
4318 var content = document.createDocumentFragment(), pos = 0;
4320 tokenSpecialChars.lastIndex = pos;
4321 var m = tokenSpecialChars.exec(text);
4322 var skipped = m ? m.index - pos : text.length - pos;
4324 content.appendChild(document.createTextNode(text.slice(pos, pos + skipped)));
4325 builder.col += skipped;
4330 var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
4331 content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
4332 builder.col += tabWidth;
4334 var token = elt("span", "\u2022", "cm-invalidchar");
4335 token.title = "\\u" + m[0].charCodeAt(0).toString(16);
4336 content.appendChild(token);
4341 if (style || startStyle || endStyle || builder.measure) {
4342 var fullStyle = style || "";
4343 if (startStyle) fullStyle += startStyle;
4344 if (endStyle) fullStyle += endStyle;
4345 var token = elt("span", [content], fullStyle);
4346 if (title) token.title = title;
4347 return builder.pre.appendChild(token);
4349 builder.pre.appendChild(content);
4352 function buildTokenMeasure(builder, text, style, startStyle, endStyle) {
4353 var wrapping = builder.cm.options.lineWrapping;
4354 for (var i = 0; i < text.length; ++i) {
4355 var ch = text.charAt(i), start = i == 0;
4356 if (ch >= "\ud800" && ch < "\udbff" && i < text.length - 1) {
4357 ch = text.slice(i, i + 2);
4359 } else if (i && wrapping && spanAffectsWrapping(text, i)) {
4360 builder.pre.appendChild(elt("wbr"));
4362 var old = builder.measure[builder.pos];
4363 var span = builder.measure[builder.pos] =
4364 buildToken(builder, ch, style,
4365 start && startStyle, i == text.length - 1 && endStyle);
4366 if (old) span.leftSide = old.leftSide || old;
4367 // In IE single-space nodes wrap differently than spaces
4368 // embedded in larger text nodes, except when set to
4369 // white-space: normal (issue #1268).
4370 if (ie && wrapping && ch == " " && i && !/\s/.test(text.charAt(i - 1)) &&
4371 i < text.length - 1 && !/\s/.test(text.charAt(i + 1)))
4372 span.style.whiteSpace = "normal";
4373 builder.pos += ch.length;
4375 if (text.length) builder.measuredSomething = true;
4378 function buildTokenSplitSpaces(inner) {
4379 function split(old) {
4381 for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
4385 return function(builder, text, style, startStyle, endStyle, title) {
4386 return inner(builder, text.replace(/ {3,}/, split), style, startStyle, endStyle, title);
4390 function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
4391 var widget = !ignoreWidget && marker.replacedWith;
4393 if (builder.copyWidgets) widget = widget.cloneNode(true);
4394 builder.pre.appendChild(widget);
4395 if (builder.measure) {
4397 builder.measure[builder.pos] = widget;
4399 var elt = builder.measure[builder.pos] = zeroWidthElement(builder.cm.display.measure);
4400 if (marker.type != "bookmark" || marker.insertLeft)
4401 builder.pre.insertBefore(elt, widget);
4403 builder.pre.appendChild(elt);
4405 builder.measuredSomething = true;
4408 builder.pos += size;
4411 // Outputs a number of spans to make up a line, taking highlighting
4412 // and marked text into account.
4413 function insertLineContent(line, builder, styles) {
4414 var spans = line.markedSpans, allText = line.text, at = 0;
4416 for (var i = 1; i < styles.length; i+=2)
4417 builder.addToken(builder, allText.slice(at, at = styles[i]), styleToClass(styles[i+1]));
4421 var len = allText.length, pos = 0, i = 1, text = "", style;
4422 var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
4424 if (nextChange == pos) { // Update current marker set
4425 spanStyle = spanEndStyle = spanStartStyle = title = "";
4426 collapsed = null; nextChange = Infinity;
4427 var foundBookmark = null;
4428 for (var j = 0; j < spans.length; ++j) {
4429 var sp = spans[j], m = sp.marker;
4430 if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
4431 if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; }
4432 if (m.className) spanStyle += " " + m.className;
4433 if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
4434 if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
4435 if (m.title && !title) title = m.title;
4436 if (m.collapsed && (!collapsed || collapsed.marker.size < m.size))
4438 } else if (sp.from > pos && nextChange > sp.from) {
4439 nextChange = sp.from;
4441 if (m.type == "bookmark" && sp.from == pos && m.replacedWith) foundBookmark = m;
4443 if (collapsed && (collapsed.from || 0) == pos) {
4444 buildCollapsedSpan(builder, (collapsed.to == null ? len : collapsed.to) - pos,
4445 collapsed.marker, collapsed.from == null);
4446 if (collapsed.to == null) return collapsed.marker.find();
4448 if (foundBookmark && !collapsed) buildCollapsedSpan(builder, 0, foundBookmark);
4450 if (pos >= len) break;
4452 var upto = Math.min(len, nextChange);
4455 var end = pos + text.length;
4457 var tokenText = end > upto ? text.slice(0, upto - pos) : text;
4458 builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
4459 spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title);
4461 if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
4463 spanStartStyle = "";
4465 text = allText.slice(at, at = styles[i++]);
4466 style = styleToClass(styles[i++]);
4471 // DOCUMENT DATA STRUCTURE
4473 function updateDoc(doc, change, markedSpans, selAfter, estimateHeight) {
4474 function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
4475 function update(line, text, spans) {
4476 updateLine(line, text, spans, estimateHeight);
4477 signalLater(line, "change", line, change);
4480 var from = change.from, to = change.to, text = change.text;
4481 var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
4482 var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
4484 // First adjust the line structure
4485 if (from.ch == 0 && to.ch == 0 && lastText == "") {
4486 // This is a whole-line replace. Treated specially to make
4487 // sure line objects move the way they are supposed to.
4488 for (var i = 0, e = text.length - 1, added = []; i < e; ++i)
4489 added.push(new Line(text[i], spansFor(i), estimateHeight));
4490 update(lastLine, lastLine.text, lastSpans);
4491 if (nlines) doc.remove(from.line, nlines);
4492 if (added.length) doc.insert(from.line, added);
4493 } else if (firstLine == lastLine) {
4494 if (text.length == 1) {
4495 update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
4497 for (var added = [], i = 1, e = text.length - 1; i < e; ++i)
4498 added.push(new Line(text[i], spansFor(i), estimateHeight));
4499 added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
4500 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
4501 doc.insert(from.line + 1, added);
4503 } else if (text.length == 1) {
4504 update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
4505 doc.remove(from.line + 1, nlines);
4507 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
4508 update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
4509 for (var i = 1, e = text.length - 1, added = []; i < e; ++i)
4510 added.push(new Line(text[i], spansFor(i), estimateHeight));
4511 if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
4512 doc.insert(from.line + 1, added);
4515 signalLater(doc, "change", doc, change);
4516 setSelection(doc, selAfter.anchor, selAfter.head, null, true);
4519 function LeafChunk(lines) {
4522 for (var i = 0, e = lines.length, height = 0; i < e; ++i) {
4523 lines[i].parent = this;
4524 height += lines[i].height;
4526 this.height = height;
4529 LeafChunk.prototype = {
4530 chunkSize: function() { return this.lines.length; },
4531 removeInner: function(at, n) {
4532 for (var i = at, e = at + n; i < e; ++i) {
4533 var line = this.lines[i];
4534 this.height -= line.height;
4536 signalLater(line, "delete");
4538 this.lines.splice(at, n);
4540 collapse: function(lines) {
4541 lines.splice.apply(lines, [lines.length, 0].concat(this.lines));
4543 insertInner: function(at, lines, height) {
4544 this.height += height;
4545 this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
4546 for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this;
4548 iterN: function(at, n, op) {
4549 for (var e = at + n; at < e; ++at)
4550 if (op(this.lines[at])) return true;
4554 function BranchChunk(children) {
4555 this.children = children;
4556 var size = 0, height = 0;
4557 for (var i = 0, e = children.length; i < e; ++i) {
4558 var ch = children[i];
4559 size += ch.chunkSize(); height += ch.height;
4563 this.height = height;
4567 BranchChunk.prototype = {
4568 chunkSize: function() { return this.size; },
4569 removeInner: function(at, n) {
4571 for (var i = 0; i < this.children.length; ++i) {
4572 var child = this.children[i], sz = child.chunkSize();
4574 var rm = Math.min(n, sz - at), oldHeight = child.height;
4575 child.removeInner(at, rm);
4576 this.height -= oldHeight - child.height;
4577 if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
4578 if ((n -= rm) == 0) break;
4582 if (this.size - n < 25) {
4584 this.collapse(lines);
4585 this.children = [new LeafChunk(lines)];
4586 this.children[0].parent = this;
4589 collapse: function(lines) {
4590 for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines);
4592 insertInner: function(at, lines, height) {
4593 this.size += lines.length;
4594 this.height += height;
4595 for (var i = 0, e = this.children.length; i < e; ++i) {
4596 var child = this.children[i], sz = child.chunkSize();
4598 child.insertInner(at, lines, height);
4599 if (child.lines && child.lines.length > 50) {
4600 while (child.lines.length > 50) {
4601 var spilled = child.lines.splice(child.lines.length - 25, 25);
4602 var newleaf = new LeafChunk(spilled);
4603 child.height -= newleaf.height;
4604 this.children.splice(i + 1, 0, newleaf);
4605 newleaf.parent = this;
4614 maybeSpill: function() {
4615 if (this.children.length <= 10) return;
4618 var spilled = me.children.splice(me.children.length - 5, 5);
4619 var sibling = new BranchChunk(spilled);
4620 if (!me.parent) { // Become the parent node
4621 var copy = new BranchChunk(me.children);
4623 me.children = [copy, sibling];
4626 me.size -= sibling.size;
4627 me.height -= sibling.height;
4628 var myIndex = indexOf(me.parent.children, me);
4629 me.parent.children.splice(myIndex + 1, 0, sibling);
4631 sibling.parent = me.parent;
4632 } while (me.children.length > 10);
4633 me.parent.maybeSpill();
4635 iterN: function(at, n, op) {
4636 for (var i = 0, e = this.children.length; i < e; ++i) {
4637 var child = this.children[i], sz = child.chunkSize();
4639 var used = Math.min(n, sz - at);
4640 if (child.iterN(at, used, op)) return true;
4641 if ((n -= used) == 0) break;
4649 var Doc = CodeMirror.Doc = function(text, mode, firstLine) {
4650 if (!(this instanceof Doc)) return new Doc(text, mode, firstLine);
4651 if (firstLine == null) firstLine = 0;
4653 BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
4654 this.first = firstLine;
4655 this.scrollTop = this.scrollLeft = 0;
4656 this.cantEdit = false;
4657 this.history = makeHistory();
4658 this.cleanGeneration = 1;
4659 this.frontier = firstLine;
4660 var start = Pos(firstLine, 0);
4661 this.sel = {from: start, to: start, head: start, anchor: start, shift: false, extend: false, goalColumn: null};
4662 this.id = ++nextDocId;
4663 this.modeOption = mode;
4665 if (typeof text == "string") text = splitLines(text);
4666 updateDoc(this, {from: start, to: start, text: text}, null, {head: start, anchor: start});
4669 Doc.prototype = createObj(BranchChunk.prototype, {
4671 iter: function(from, to, op) {
4672 if (op) this.iterN(from - this.first, to - from, op);
4673 else this.iterN(this.first, this.first + this.size, from);
4676 insert: function(at, lines) {
4678 for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;
4679 this.insertInner(at - this.first, lines, height);
4681 remove: function(at, n) { this.removeInner(at - this.first, n); },
4683 getValue: function(lineSep) {
4684 var lines = getLines(this, this.first, this.first + this.size);
4685 if (lineSep === false) return lines;
4686 return lines.join(lineSep || "\n");
4688 setValue: function(code) {
4689 var top = Pos(this.first, 0), last = this.first + this.size - 1;
4690 makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
4691 text: splitLines(code), origin: "setValue"},
4692 {head: top, anchor: top}, true);
4694 replaceRange: function(code, from, to, origin) {
4695 from = clipPos(this, from);
4696 to = to ? clipPos(this, to) : from;
4697 replaceRange(this, code, from, to, origin);
4699 getRange: function(from, to, lineSep) {
4700 var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
4701 if (lineSep === false) return lines;
4702 return lines.join(lineSep || "\n");
4705 getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
4706 setLine: function(line, text) {
4707 if (isLine(this, line))
4708 replaceRange(this, text, Pos(line, 0), clipPos(this, Pos(line)));
4710 removeLine: function(line) {
4711 if (line) replaceRange(this, "", clipPos(this, Pos(line - 1)), clipPos(this, Pos(line)));
4712 else replaceRange(this, "", Pos(0, 0), clipPos(this, Pos(1, 0)));
4715 getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
4716 getLineNumber: function(line) {return lineNo(line);},
4718 getLineHandleVisualStart: function(line) {
4719 if (typeof line == "number") line = getLine(this, line);
4720 return visualLine(this, line);
4723 lineCount: function() {return this.size;},
4724 firstLine: function() {return this.first;},
4725 lastLine: function() {return this.first + this.size - 1;},
4727 clipPos: function(pos) {return clipPos(this, pos);},
4729 getCursor: function(start) {
4730 var sel = this.sel, pos;
4731 if (start == null || start == "head") pos = sel.head;
4732 else if (start == "anchor") pos = sel.anchor;
4733 else if (start == "end" || start === false) pos = sel.to;
4734 else pos = sel.from;
4735 return copyPos(pos);
4737 somethingSelected: function() {return !posEq(this.sel.head, this.sel.anchor);},
4739 setCursor: docOperation(function(line, ch, extend) {
4740 var pos = clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line);
4741 if (extend) extendSelection(this, pos);
4742 else setSelection(this, pos, pos);
4744 setSelection: docOperation(function(anchor, head) {
4745 setSelection(this, clipPos(this, anchor), clipPos(this, head || anchor));
4747 extendSelection: docOperation(function(from, to) {
4748 extendSelection(this, clipPos(this, from), to && clipPos(this, to));
4751 getSelection: function(lineSep) {return this.getRange(this.sel.from, this.sel.to, lineSep);},
4752 replaceSelection: function(code, collapse, origin) {
4753 makeChange(this, {from: this.sel.from, to: this.sel.to, text: splitLines(code), origin: origin}, collapse || "around");
4755 undo: docOperation(function() {makeChangeFromHistory(this, "undo");}),
4756 redo: docOperation(function() {makeChangeFromHistory(this, "redo");}),
4758 setExtending: function(val) {this.sel.extend = val;},
4760 historySize: function() {
4761 var hist = this.history;
4762 return {undo: hist.done.length, redo: hist.undone.length};
4764 clearHistory: function() {this.history = makeHistory(this.history.maxGeneration);},
4766 markClean: function() {
4767 this.cleanGeneration = this.changeGeneration();
4769 changeGeneration: function() {
4770 this.history.lastOp = this.history.lastOrigin = null;
4771 return this.history.generation;
4773 isClean: function (gen) {
4774 return this.history.generation == (gen || this.cleanGeneration);
4777 getHistory: function() {
4778 return {done: copyHistoryArray(this.history.done),
4779 undone: copyHistoryArray(this.history.undone)};
4781 setHistory: function(histData) {
4782 var hist = this.history = makeHistory(this.history.maxGeneration);
4783 hist.done = histData.done.slice(0);
4784 hist.undone = histData.undone.slice(0);
4787 markText: function(from, to, options) {
4788 return markText(this, clipPos(this, from), clipPos(this, to), options, "range");
4790 setBookmark: function(pos, options) {
4791 var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
4792 insertLeft: options && options.insertLeft};
4793 pos = clipPos(this, pos);
4794 return markText(this, pos, pos, realOpts, "bookmark");
4796 findMarksAt: function(pos) {
4797 pos = clipPos(this, pos);
4798 var markers = [], spans = getLine(this, pos.line).markedSpans;
4799 if (spans) for (var i = 0; i < spans.length; ++i) {
4800 var span = spans[i];
4801 if ((span.from == null || span.from <= pos.ch) &&
4802 (span.to == null || span.to >= pos.ch))
4803 markers.push(span.marker.parent || span.marker);
4807 getAllMarks: function() {
4809 this.iter(function(line) {
4810 var sps = line.markedSpans;
4811 if (sps) for (var i = 0; i < sps.length; ++i)
4812 if (sps[i].from != null) markers.push(sps[i].marker);
4817 posFromIndex: function(off) {
4818 var ch, lineNo = this.first;
4819 this.iter(function(line) {
4820 var sz = line.text.length + 1;
4821 if (sz > off) { ch = off; return true; }
4825 return clipPos(this, Pos(lineNo, ch));
4827 indexFromPos: function (coords) {
4828 coords = clipPos(this, coords);
4829 var index = coords.ch;
4830 if (coords.line < this.first || coords.ch < 0) return 0;
4831 this.iter(this.first, coords.line, function (line) {
4832 index += line.text.length + 1;
4837 copy: function(copyHistory) {
4838 var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first);
4839 doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
4840 doc.sel = {from: this.sel.from, to: this.sel.to, head: this.sel.head, anchor: this.sel.anchor,
4841 shift: this.sel.shift, extend: false, goalColumn: this.sel.goalColumn};
4843 doc.history.undoDepth = this.history.undoDepth;
4844 doc.setHistory(this.getHistory());
4849 linkedDoc: function(options) {
4850 if (!options) options = {};
4851 var from = this.first, to = this.first + this.size;
4852 if (options.from != null && options.from > from) from = options.from;
4853 if (options.to != null && options.to < to) to = options.to;
4854 var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from);
4855 if (options.sharedHist) copy.history = this.history;
4856 (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
4857 copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
4860 unlinkDoc: function(other) {
4861 if (other instanceof CodeMirror) other = other.doc;
4862 if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
4863 var link = this.linked[i];
4864 if (link.doc != other) continue;
4865 this.linked.splice(i, 1);
4866 other.unlinkDoc(this);
4869 // If the histories were shared, split them again
4870 if (other.history == this.history) {
4871 var splitIds = [other.id];
4872 linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
4873 other.history = makeHistory();
4874 other.history.done = copyHistoryArray(this.history.done, splitIds);
4875 other.history.undone = copyHistoryArray(this.history.undone, splitIds);
4878 iterLinkedDocs: function(f) {linkedDocs(this, f);},
4880 getMode: function() {return this.mode;},
4881 getEditor: function() {return this.cm;}
4884 Doc.prototype.eachLine = Doc.prototype.iter;
4886 // The Doc methods that should be available on CodeMirror instances
4887 var dontDelegate = "iter insert remove copy getEditor".split(" ");
4888 for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
4889 CodeMirror.prototype[prop] = (function(method) {
4890 return function() {return method.apply(this.doc, arguments);};
4891 })(Doc.prototype[prop]);
4895 function linkedDocs(doc, f, sharedHistOnly) {
4896 function propagate(doc, skip, sharedHist) {
4897 if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
4898 var rel = doc.linked[i];
4899 if (rel.doc == skip) continue;
4900 var shared = sharedHist && rel.sharedHist;
4901 if (sharedHistOnly && !shared) continue;
4903 propagate(rel.doc, doc, shared);
4906 propagate(doc, null, true);
4909 function attachDoc(cm, doc) {
4910 if (doc.cm) throw new Error("This document is already in use.");
4913 estimateLineHeights(cm);
4915 if (!cm.options.lineWrapping) computeMaxLength(cm);
4916 cm.options.mode = doc.modeOption;
4922 function getLine(chunk, n) {
4924 while (!chunk.lines) {
4925 for (var i = 0;; ++i) {
4926 var child = chunk.children[i], sz = child.chunkSize();
4927 if (n < sz) { chunk = child; break; }
4931 return chunk.lines[n];
4934 function getBetween(doc, start, end) {
4935 var out = [], n = start.line;
4936 doc.iter(start.line, end.line + 1, function(line) {
4937 var text = line.text;
4938 if (n == end.line) text = text.slice(0, end.ch);
4939 if (n == start.line) text = text.slice(start.ch);
4945 function getLines(doc, from, to) {
4947 doc.iter(from, to, function(line) { out.push(line.text); });
4951 function updateLineHeight(line, height) {
4952 var diff = height - line.height;
4953 for (var n = line; n; n = n.parent) n.height += diff;
4956 function lineNo(line) {
4957 if (line.parent == null) return null;
4958 var cur = line.parent, no = indexOf(cur.lines, line);
4959 for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
4960 for (var i = 0;; ++i) {
4961 if (chunk.children[i] == cur) break;
4962 no += chunk.children[i].chunkSize();
4965 return no + cur.first;
4968 function lineAtHeight(chunk, h) {
4969 var n = chunk.first;
4971 for (var i = 0, e = chunk.children.length; i < e; ++i) {
4972 var child = chunk.children[i], ch = child.height;
4973 if (h < ch) { chunk = child; continue outer; }
4975 n += child.chunkSize();
4978 } while (!chunk.lines);
4979 for (var i = 0, e = chunk.lines.length; i < e; ++i) {
4980 var line = chunk.lines[i], lh = line.height;
4987 function heightAtLine(cm, lineObj) {
4988 lineObj = visualLine(cm.doc, lineObj);
4990 var h = 0, chunk = lineObj.parent;
4991 for (var i = 0; i < chunk.lines.length; ++i) {
4992 var line = chunk.lines[i];
4993 if (line == lineObj) break;
4994 else h += line.height;
4996 for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
4997 for (var i = 0; i < p.children.length; ++i) {
4998 var cur = p.children[i];
4999 if (cur == chunk) break;
5000 else h += cur.height;
5006 function getOrder(line) {
5007 var order = line.order;
5008 if (order == null) order = line.order = bidiOrdering(line.text);
5014 function makeHistory(startGen) {
5016 // Arrays of history events. Doing something adds an event to
5017 // done and clears undo. Undoing moves events from done to
5018 // undone, redoing moves them in the other direction.
5019 done: [], undone: [], undoDepth: Infinity,
5020 // Used to track when changes can be merged into a single undo
5022 lastTime: 0, lastOp: null, lastOrigin: null,
5023 // Used by the isClean() method
5024 generation: startGen || 1, maxGeneration: startGen || 1
5028 function attachLocalSpans(doc, change, from, to) {
5029 var existing = change["spans_" + doc.id], n = 0;
5030 doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
5031 if (line.markedSpans)
5032 (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
5037 function historyChangeFromChange(doc, change) {
5038 var from = { line: change.from.line, ch: change.from.ch };
5039 var histChange = {from: from, to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
5040 attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
5041 linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
5045 function addToHistory(doc, change, selAfter, opId) {
5046 var hist = doc.history;
5047 hist.undone.length = 0;
5048 var time = +new Date, cur = lst(hist.done);
5051 (hist.lastOp == opId ||
5052 hist.lastOrigin == change.origin && change.origin &&
5053 ((change.origin.charAt(0) == "+" && doc.cm && hist.lastTime > time - doc.cm.options.historyEventDelay) ||
5054 change.origin.charAt(0) == "*"))) {
5055 // Merge this change into the last event
5056 var last = lst(cur.changes);
5057 if (posEq(change.from, change.to) && posEq(change.from, last.to)) {
5058 // Optimized case for simple insertion -- don't want to add
5059 // new changesets for every character typed
5060 last.to = changeEnd(change);
5062 // Add new sub-event
5063 cur.changes.push(historyChangeFromChange(doc, change));
5065 cur.anchorAfter = selAfter.anchor; cur.headAfter = selAfter.head;
5067 // Can not be merged, start a new event.
5068 cur = {changes: [historyChangeFromChange(doc, change)],
5069 generation: hist.generation,
5070 anchorBefore: doc.sel.anchor, headBefore: doc.sel.head,
5071 anchorAfter: selAfter.anchor, headAfter: selAfter.head};
5072 hist.done.push(cur);
5073 hist.generation = ++hist.maxGeneration;
5074 while (hist.done.length > hist.undoDepth)
5077 hist.lastTime = time;
5079 hist.lastOrigin = change.origin;
5082 function removeClearedSpans(spans) {
5083 if (!spans) return null;
5084 for (var i = 0, out; i < spans.length; ++i) {
5085 if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
5086 else if (out) out.push(spans[i]);
5088 return !out ? spans : out.length ? out : null;
5091 function getOldSpans(doc, change) {
5092 var found = change["spans_" + doc.id];
5093 if (!found) return null;
5094 for (var i = 0, nw = []; i < change.text.length; ++i)
5095 nw.push(removeClearedSpans(found[i]));
5099 // Used both to provide a JSON-safe object in .getHistory, and, when
5100 // detaching a document, to split the history in two
5101 function copyHistoryArray(events, newGroup) {
5102 for (var i = 0, copy = []; i < events.length; ++i) {
5103 var event = events[i], changes = event.changes, newChanges = [];
5104 copy.push({changes: newChanges, anchorBefore: event.anchorBefore, headBefore: event.headBefore,
5105 anchorAfter: event.anchorAfter, headAfter: event.headAfter});
5106 for (var j = 0; j < changes.length; ++j) {
5107 var change = changes[j], m;
5108 newChanges.push({from: change.from, to: change.to, text: change.text});
5109 if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
5110 if (indexOf(newGroup, Number(m[1])) > -1) {
5111 lst(newChanges)[prop] = change[prop];
5112 delete change[prop];
5120 // Rebasing/resetting history to deal with externally-sourced changes
5122 function rebaseHistSel(pos, from, to, diff) {
5123 if (to < pos.line) {
5125 } else if (from < pos.line) {
5131 // Tries to rebase an array of history events given a change in the
5132 // document. If the change touches the same lines as the event, the
5133 // event, and everything 'behind' it, is discarded. If the change is
5134 // before the event, the event's positions are updated. Uses a
5135 // copy-on-write scheme for the positions, to avoid having to
5136 // reallocate them all on every rebase, but also avoid problems with
5137 // shared position objects being unsafely updated.
5138 function rebaseHistArray(array, from, to, diff) {
5139 for (var i = 0; i < array.length; ++i) {
5140 var sub = array[i], ok = true;
5141 for (var j = 0; j < sub.changes.length; ++j) {
5142 var cur = sub.changes[j];
5143 if (!sub.copied) { cur.from = copyPos(cur.from); cur.to = copyPos(cur.to); }
5144 if (to < cur.from.line) {
5145 cur.from.line += diff;
5146 cur.to.line += diff;
5147 } else if (from <= cur.to.line) {
5153 sub.anchorBefore = copyPos(sub.anchorBefore); sub.headBefore = copyPos(sub.headBefore);
5154 sub.anchorAfter = copyPos(sub.anchorAfter); sub.readAfter = copyPos(sub.headAfter);
5158 array.splice(0, i + 1);
5161 rebaseHistSel(sub.anchorBefore); rebaseHistSel(sub.headBefore);
5162 rebaseHistSel(sub.anchorAfter); rebaseHistSel(sub.headAfter);
5167 function rebaseHist(hist, change) {
5168 var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
5169 rebaseHistArray(hist.done, from, to, diff);
5170 rebaseHistArray(hist.undone, from, to, diff);
5175 function stopMethod() {e_stop(this);}
5176 // Ensure an event has a stop method.
5177 function addStop(event) {
5178 if (!event.stop) event.stop = stopMethod;
5182 function e_preventDefault(e) {
5183 if (e.preventDefault) e.preventDefault();
5184 else e.returnValue = false;
5186 function e_stopPropagation(e) {
5187 if (e.stopPropagation) e.stopPropagation();
5188 else e.cancelBubble = true;
5190 function e_defaultPrevented(e) {
5191 return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;
5193 function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
5194 CodeMirror.e_stop = e_stop;
5195 CodeMirror.e_preventDefault = e_preventDefault;
5196 CodeMirror.e_stopPropagation = e_stopPropagation;
5198 function e_target(e) {return e.target || e.srcElement;}
5199 function e_button(e) {
5202 if (e.button & 1) b = 1;
5203 else if (e.button & 2) b = 3;
5204 else if (e.button & 4) b = 2;
5206 if (mac && e.ctrlKey && b == 1) b = 3;
5212 function on(emitter, type, f) {
5213 if (emitter.addEventListener)
5214 emitter.addEventListener(type, f, false);
5215 else if (emitter.attachEvent)
5216 emitter.attachEvent("on" + type, f);
5218 var map = emitter._handlers || (emitter._handlers = {});
5219 var arr = map[type] || (map[type] = []);
5224 function off(emitter, type, f) {
5225 if (emitter.removeEventListener)
5226 emitter.removeEventListener(type, f, false);
5227 else if (emitter.detachEvent)
5228 emitter.detachEvent("on" + type, f);
5230 var arr = emitter._handlers && emitter._handlers[type];
5232 for (var i = 0; i < arr.length; ++i)
5233 if (arr[i] == f) { arr.splice(i, 1); break; }
5237 function signal(emitter, type /*, values...*/) {
5238 var arr = emitter._handlers && emitter._handlers[type];
5240 var args = Array.prototype.slice.call(arguments, 2);
5241 for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
5244 var delayedCallbacks, delayedCallbackDepth = 0;
5245 function signalLater(emitter, type /*, values...*/) {
5246 var arr = emitter._handlers && emitter._handlers[type];
5248 var args = Array.prototype.slice.call(arguments, 2);
5249 if (!delayedCallbacks) {
5250 ++delayedCallbackDepth;
5251 delayedCallbacks = [];
5252 setTimeout(fireDelayed, 0);
5254 function bnd(f) {return function(){f.apply(null, args);};};
5255 for (var i = 0; i < arr.length; ++i)
5256 delayedCallbacks.push(bnd(arr[i]));
5259 function signalDOMEvent(cm, e, override) {
5260 signal(cm, override || e.type, cm, e);
5261 return e_defaultPrevented(e) || e.codemirrorIgnore;
5264 function fireDelayed() {
5265 --delayedCallbackDepth;
5266 var delayed = delayedCallbacks;
5267 delayedCallbacks = null;
5268 for (var i = 0; i < delayed.length; ++i) delayed[i]();
5271 function hasHandler(emitter, type) {
5272 var arr = emitter._handlers && emitter._handlers[type];
5273 return arr && arr.length > 0;
5276 CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal;
5278 function eventMixin(ctor) {
5279 ctor.prototype.on = function(type, f) {on(this, type, f);};
5280 ctor.prototype.off = function(type, f) {off(this, type, f);};
5285 // Number of pixels added to scroller and sizer to hide scrollbar
5286 var scrollerCutOff = 30;
5288 // Returned or thrown by various protocols to signal 'I'm not
5290 var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
5292 function Delayed() {this.id = null;}
5293 Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}};
5295 // Counts the column offset in a string, taking tabs into account.
5296 // Used mostly to find indentation.
5297 function countColumn(string, end, tabSize, startIndex, startValue) {
5299 end = string.search(/[^\s\u00a0]/);
5300 if (end == -1) end = string.length;
5302 for (var i = startIndex || 0, n = startValue || 0; i < end; ++i) {
5303 if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);
5308 CodeMirror.countColumn = countColumn;
5310 var spaceStrs = [""];
5311 function spaceStr(n) {
5312 while (spaceStrs.length <= n)
5313 spaceStrs.push(lst(spaceStrs) + " ");
5314 return spaceStrs[n];
5317 function lst(arr) { return arr[arr.length-1]; }
5319 function selectInput(node) {
5320 if (ios) { // Mobile Safari apparently has a bug where select() is broken.
5321 node.selectionStart = 0;
5322 node.selectionEnd = node.value.length;
5324 // Suppress mysterious IE10 errors
5325 try { node.select(); }
5330 function indexOf(collection, elt) {
5331 if (collection.indexOf) return collection.indexOf(elt);
5332 for (var i = 0, e = collection.length; i < e; ++i)
5333 if (collection[i] == elt) return i;
5337 function createObj(base, props) {
5339 Obj.prototype = base;
5340 var inst = new Obj();
5341 if (props) copyObj(props, inst);
5345 function copyObj(obj, target) {
5346 if (!target) target = {};
5347 for (var prop in obj) if (obj.hasOwnProperty(prop)) target[prop] = obj[prop];
5351 function emptyArray(size) {
5352 for (var a = [], i = 0; i < size; ++i) a.push(undefined);
5357 var args = Array.prototype.slice.call(arguments, 1);
5358 return function(){return f.apply(null, args);};
5361 var nonASCIISingleCaseWordChar = /[\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
5362 function isWordChar(ch) {
5363 return /\w/.test(ch) || ch > "\x80" &&
5364 (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
5367 function isEmpty(obj) {
5368 for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
5372 var isExtendingChar = /[\u0300-\u036F\u0483-\u0487\u0488-\u0489\u0591-\u05BD\u05BF\u05C1-\u05C2\u05C4-\u05C5\u05C7\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7-\u06E8\u06EA-\u06ED\uA66F\uA670-\uA672\uA674-\uA67D\uA69F\udc00-\udfff]/;
5376 function elt(tag, content, className, style) {
5377 var e = document.createElement(tag);
5378 if (className) e.className = className;
5379 if (style) e.style.cssText = style;
5380 if (typeof content == "string") setTextContent(e, content);
5381 else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
5385 function removeChildren(e) {
5386 for (var count = e.childNodes.length; count > 0; --count)
5387 e.removeChild(e.firstChild);
5391 function removeChildrenAndAdd(parent, e) {
5392 return removeChildren(parent).appendChild(e);
5395 function setTextContent(e, str) {
5398 e.appendChild(document.createTextNode(str));
5399 } else e.textContent = str;
5402 function getRect(node) {
5403 return node.getBoundingClientRect();
5405 CodeMirror.replaceGetRect = function(f) { getRect = f; };
5407 // FEATURE DETECTION
5409 // Detect drag-and-drop
5410 var dragAndDrop = function() {
5411 // There is *some* kind of drag-and-drop support in IE6-8, but I
5412 // couldn't get it to work yet.
5413 if (ie_lt9) return false;
5414 var div = elt('div');
5415 return "draggable" in div || "dragDrop" in div;
5418 // For a reason I have yet to figure out, some browsers disallow
5419 // word wrapping between certain characters *only* if a new inline
5420 // element is started between them. This makes it hard to reliably
5421 // measure the position of things, since that requires inserting an
5422 // extra span. This terribly fragile set of tests matches the
5423 // character combinations that suffer from this phenomenon on the
5424 // various browsers.
5425 function spanAffectsWrapping() { return false; }
5426 if (gecko) // Only for "$'"
5427 spanAffectsWrapping = function(str, i) {
5428 return str.charCodeAt(i - 1) == 36 && str.charCodeAt(i) == 39;
5430 else if (safari && !/Version\/([6-9]|\d\d)\b/.test(navigator.userAgent))
5431 spanAffectsWrapping = function(str, i) {
5432 return /\-[^ \-?]|\?[^ !\'\"\),.\-\/:;\?\]\}]/.test(str.slice(i - 1, i + 1));
5434 else if (webkit && !/Chrome\/(?:29|[3-9]\d|\d\d\d)\./.test(navigator.userAgent))
5435 spanAffectsWrapping = function(str, i) {
5436 if (i > 1 && str.charCodeAt(i - 1) == 45) {
5437 if (/\w/.test(str.charAt(i - 2)) && /[^\-?\.]/.test(str.charAt(i))) return true;
5438 if (i > 2 && /[\d\.,]/.test(str.charAt(i - 2)) && /[\d\.,]/.test(str.charAt(i))) return false;
5440 return /[~!#%&*)=+}\]|\"\.>,:;][({[<]|-[^\-?\.\u2010-\u201f\u2026]|\?[\w~`@#$%\^&*(_=+{[|><]|…[\w~`@#$%\^&*(_=+{[><]/.test(str.slice(i - 1, i + 1));
5443 var knownScrollbarWidth;
5444 function scrollbarWidth(measure) {
5445 if (knownScrollbarWidth != null) return knownScrollbarWidth;
5446 var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll");
5447 removeChildrenAndAdd(measure, test);
5448 if (test.offsetWidth)
5449 knownScrollbarWidth = test.offsetHeight - test.clientHeight;
5450 return knownScrollbarWidth || 0;
5454 function zeroWidthElement(measure) {
5455 if (zwspSupported == null) {
5456 var test = elt("span", "\u200b");
5457 removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
5458 if (measure.firstChild.offsetHeight != 0)
5459 zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_lt8;
5461 if (zwspSupported) return elt("span", "\u200b");
5462 else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
5465 // See if "".split is the broken IE version, if so, provide an
5466 // alternative way to split lines.
5467 var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
5468 var pos = 0, result = [], l = string.length;
5470 var nl = string.indexOf("\n", pos);
5471 if (nl == -1) nl = string.length;
5472 var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
5473 var rt = line.indexOf("\r");
5475 result.push(line.slice(0, rt));
5483 } : function(string){return string.split(/\r\n?|\n/);};
5484 CodeMirror.splitLines = splitLines;
5486 var hasSelection = window.getSelection ? function(te) {
5487 try { return te.selectionStart != te.selectionEnd; }
5488 catch(e) { return false; }
5490 try {var range = te.ownerDocument.selection.createRange();}
5492 if (!range || range.parentElement() != te) return false;
5493 return range.compareEndPoints("StartToEnd", range) != 0;
5496 var hasCopyEvent = (function() {
5498 if ("oncopy" in e) return true;
5499 e.setAttribute("oncopy", "return;");
5500 return typeof e.oncopy == 'function';
5505 var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
5506 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
5507 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
5508 46: "Delete", 59: ";", 91: "Mod", 92: "Mod", 93: "Mod", 109: "-", 107: "=", 127: "Delete",
5509 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
5510 221: "]", 222: "'", 63276: "PageUp", 63277: "PageDown", 63275: "End", 63273: "Home",
5511 63234: "Left", 63232: "Up", 63235: "Right", 63233: "Down", 63302: "Insert", 63272: "Delete"};
5512 CodeMirror.keyNames = keyNames;
5515 for (var i = 0; i < 10; i++) keyNames[i + 48] = String(i);
5517 for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
5519 for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
5524 function iterateBidiSections(order, from, to, f) {
5525 if (!order) return f(from, to, "ltr");
5527 for (var i = 0; i < order.length; ++i) {
5528 var part = order[i];
5529 if (part.from < to && part.to > from || from == to && part.to == from) {
5530 f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
5534 if (!found) f(from, to, "ltr");
5537 function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
5538 function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
5540 function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
5541 function lineRight(line) {
5542 var order = getOrder(line);
5543 if (!order) return line.text.length;
5544 return bidiRight(lst(order));
5547 function lineStart(cm, lineN) {
5548 var line = getLine(cm.doc, lineN);
5549 var visual = visualLine(cm.doc, line);
5550 if (visual != line) lineN = lineNo(visual);
5551 var order = getOrder(visual);
5552 var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
5553 return Pos(lineN, ch);
5555 function lineEnd(cm, lineN) {
5557 while (merged = collapsedSpanAtEnd(line = getLine(cm.doc, lineN)))
5558 lineN = merged.find().to.line;
5559 var order = getOrder(line);
5560 var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
5561 return Pos(lineN, ch);
5564 function compareBidiLevel(order, a, b) {
5565 var linedir = order[0].level;
5566 if (a == linedir) return true;
5567 if (b == linedir) return false;
5571 function getBidiPartAt(order, pos) {
5572 for (var i = 0, found; i < order.length; ++i) {
5574 if (cur.from < pos && cur.to > pos) { bidiOther = null; return i; }
5575 if (cur.from == pos || cur.to == pos) {
5576 if (found == null) {
5578 } else if (compareBidiLevel(order, cur.level, order[found].level)) {
5591 function moveInLine(line, pos, dir, byUnit) {
5592 if (!byUnit) return pos + dir;
5594 while (pos > 0 && isExtendingChar.test(line.text.charAt(pos)));
5598 // This is somewhat involved. It is needed in order to move
5599 // 'visually' through bi-directional text -- i.e., pressing left
5600 // should make the cursor go left, even when in RTL text. The
5601 // tricky part is the 'jumps', where RTL and LTR text touch each
5602 // other. This often requires the cursor offset to move more than
5603 // one unit, in order to visually move one unit.
5604 function moveVisually(line, start, dir, byUnit) {
5605 var bidi = getOrder(line);
5606 if (!bidi) return moveLogically(line, start, dir, byUnit);
5607 var pos = getBidiPartAt(bidi, start), part = bidi[pos];
5608 var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
5611 if (target > part.from && target < part.to) return target;
5612 if (target == part.from || target == part.to) {
5613 if (getBidiPartAt(bidi, target) == pos) return target;
5614 part = bidi[pos += dir];
5615 return (dir > 0) == part.level % 2 ? part.to : part.from;
5617 part = bidi[pos += dir];
5618 if (!part) return null;
5619 if ((dir > 0) == part.level % 2)
5620 target = moveInLine(line, part.to, -1, byUnit);
5622 target = moveInLine(line, part.from, 1, byUnit);
5627 function moveLogically(line, start, dir, byUnit) {
5628 var target = start + dir;
5629 if (byUnit) while (target > 0 && isExtendingChar.test(line.text.charAt(target))) target += dir;
5630 return target < 0 || target > line.text.length ? null : target;
5633 // Bidirectional ordering algorithm
5634 // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
5635 // that this (partially) implements.
5637 // One-char codes used for character types:
5638 // L (L): Left-to-Right
5639 // R (R): Right-to-Left
5640 // r (AL): Right-to-Left Arabic
5641 // 1 (EN): European Number
5642 // + (ES): European Number Separator
5643 // % (ET): European Number Terminator
5644 // n (AN): Arabic Number
5645 // , (CS): Common Number Separator
5646 // m (NSM): Non-Spacing Mark
5647 // b (BN): Boundary Neutral
5648 // s (B): Paragraph Separator
5649 // t (S): Segment Separator
5650 // w (WS): Whitespace
5651 // N (ON): Other Neutrals
5653 // Returns null if characters are ordered as they appear
5654 // (left-to-right), or an array of sections ({from, to, level}
5655 // objects) in the order in which they occur visually.
5656 var bidiOrdering = (function() {
5657 // Character types for codepoints 0 to 0xff
5658 var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLL";
5659 // Character types for codepoints 0x600 to 0x6ff
5660 var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmmrrrrrrrrrrrrrrrrrr";
5661 function charType(code) {
5662 if (code <= 0xff) return lowTypes.charAt(code);
5663 else if (0x590 <= code && code <= 0x5f4) return "R";
5664 else if (0x600 <= code && code <= 0x6ff) return arabicTypes.charAt(code - 0x600);
5665 else if (0x700 <= code && code <= 0x8ac) return "r";
5669 var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
5670 var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
5671 // Browsers seem to always treat the boundaries of block elements as being L.
5672 var outerType = "L";
5674 return function(str) {
5675 if (!bidiRE.test(str)) return false;
5676 var len = str.length, types = [];
5677 for (var i = 0, type; i < len; ++i)
5678 types.push(type = charType(str.charCodeAt(i)));
5680 // W1. Examine each non-spacing mark (NSM) in the level run, and
5681 // change the type of the NSM to the type of the previous
5682 // character. If the NSM is at the start of the level run, it will
5683 // get the type of sor.
5684 for (var i = 0, prev = outerType; i < len; ++i) {
5685 var type = types[i];
5686 if (type == "m") types[i] = prev;
5690 // W2. Search backwards from each instance of a European number
5691 // until the first strong type (R, L, AL, or sor) is found. If an
5692 // AL is found, change the type of the European number to Arabic
5694 // W3. Change all ALs to R.
5695 for (var i = 0, cur = outerType; i < len; ++i) {
5696 var type = types[i];
5697 if (type == "1" && cur == "r") types[i] = "n";
5698 else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
5701 // W4. A single European separator between two European numbers
5702 // changes to a European number. A single common separator between
5703 // two numbers of the same type changes to that type.
5704 for (var i = 1, prev = types[0]; i < len - 1; ++i) {
5705 var type = types[i];
5706 if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
5707 else if (type == "," && prev == types[i+1] &&
5708 (prev == "1" || prev == "n")) types[i] = prev;
5712 // W5. A sequence of European terminators adjacent to European
5713 // numbers changes to all European numbers.
5714 // W6. Otherwise, separators and terminators change to Other
5716 for (var i = 0; i < len; ++i) {
5717 var type = types[i];
5718 if (type == ",") types[i] = "N";
5719 else if (type == "%") {
5720 for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
5721 var replace = (i && types[i-1] == "!") || (end < len - 1 && types[end] == "1") ? "1" : "N";
5722 for (var j = i; j < end; ++j) types[j] = replace;
5727 // W7. Search backwards from each instance of a European number
5728 // until the first strong type (R, L, or sor) is found. If an L is
5729 // found, then change the type of the European number to L.
5730 for (var i = 0, cur = outerType; i < len; ++i) {
5731 var type = types[i];
5732 if (cur == "L" && type == "1") types[i] = "L";
5733 else if (isStrong.test(type)) cur = type;
5736 // N1. A sequence of neutrals takes the direction of the
5737 // surrounding strong text if the text on both sides has the same
5738 // direction. European and Arabic numbers act as if they were R in
5739 // terms of their influence on neutrals. Start-of-level-run (sor)
5740 // and end-of-level-run (eor) are used at level run boundaries.
5741 // N2. Any remaining neutrals take the embedding direction.
5742 for (var i = 0; i < len; ++i) {
5743 if (isNeutral.test(types[i])) {
5744 for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
5745 var before = (i ? types[i-1] : outerType) == "L";
5746 var after = (end < len - 1 ? types[end] : outerType) == "L";
5747 var replace = before || after ? "L" : "R";
5748 for (var j = i; j < end; ++j) types[j] = replace;
5753 // Here we depart from the documented algorithm, in order to avoid
5754 // building up an actual levels array. Since there are only three
5755 // levels (0, 1, 2) in an implementation that doesn't take
5756 // explicit embedding into account, we can build up the order on
5757 // the fly, without following the level-based algorithm.
5759 for (var i = 0; i < len;) {
5760 if (countsAsLeft.test(types[i])) {
5762 for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
5763 order.push({from: start, to: i, level: 0});
5765 var pos = i, at = order.length;
5766 for (++i; i < len && types[i] != "L"; ++i) {}
5767 for (var j = pos; j < i;) {
5768 if (countsAsNum.test(types[j])) {
5769 if (pos < j) order.splice(at, 0, {from: pos, to: j, level: 1});
5771 for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
5772 order.splice(at, 0, {from: nstart, to: j, level: 2});
5776 if (pos < i) order.splice(at, 0, {from: pos, to: i, level: 1});
5779 if (order[0].level == 1 && (m = str.match(/^\s+/))) {
5780 order[0].from = m[0].length;
5781 order.unshift({from: 0, to: m[0].length, level: 0});
5783 if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
5784 lst(order).to -= m[0].length;
5785 order.push({from: len - m[0].length, to: len, level: 0});
5787 if (order[0].level != lst(order).level)
5788 order.push({from: len, to: len, level: order[0].level});
5796 CodeMirror.version = "3.15.0";