Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(984)

Issues Search
    My Issues | Starred     Open | Closed | All

Side by Side Diff: experimental/webtry/res/js/cm/codemirror.js

Issue 688713002: delete webtry from main skia repo; it's been moved to buildbots (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 6 years, 1 month ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « experimental/webtry/res/js/cm/clike.js ('k') | experimental/webtry/res/js/polyfill.js » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
(Empty)
1 // This is CodeMirror (http://codemirror.net), a code editor
2 // implemented in JavaScript on top of the browser's DOM.
3 //
4 // You can find some technical background for some of the code below
5 // at http://marijnhaverbeke.nl/blog/#cm-internals .
6
7 (function(mod) {
8 if (typeof exports == "object" && typeof module == "object") // CommonJS
9 module.exports = mod();
10 else if (typeof define == "function" && define.amd) // AMD
11 return define([], mod);
12 else // Plain browser env
13 this.CodeMirror = mod();
14 })(function() {
15 "use strict";
16
17 // BROWSER SNIFFING
18
19 // Kludges for bugs and behavior differences that can't be feature
20 // detected are enabled based on userAgent etc sniffing.
21
22 var gecko = /gecko\/\d/i.test(navigator.userAgent);
23 // ie_uptoN means Internet Explorer version N or lower
24 var ie_upto10 = /MSIE \d/.test(navigator.userAgent);
25 var ie_upto7 = ie_upto10 && (document.documentMode == null || document.documen tMode < 8);
26 var ie_upto8 = ie_upto10 && (document.documentMode == null || document.documen tMode < 9);
27 var ie_upto9 = ie_upto10 && (document.documentMode == null || document.documen tMode < 10);
28 var ie_11up = /Trident\/([7-9]|\d{2,})\./.test(navigator.userAgent);
29 var ie = ie_upto10 || ie_11up;
30 var webkit = /WebKit\//.test(navigator.userAgent);
31 var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
32 var chrome = /Chrome\//.test(navigator.userAgent);
33 var presto = /Opera\//.test(navigator.userAgent);
34 var safari = /Apple Computer/.test(navigator.vendor);
35 var khtml = /KHTML\//.test(navigator.userAgent);
36 var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAge nt);
37 var phantom = /PhantomJS/.test(navigator.userAgent);
38
39 var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(naviga tor.userAgent);
40 // This is woefully incomplete. Suggestions for alternative methods welcome.
41 var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i .test(navigator.userAgent);
42 var mac = ios || /Mac/.test(navigator.platform);
43 var windows = /win/i.test(navigator.platform);
44
45 var presto_version = presto && navigator.userAgent.match(/Version\/(\d*\.\d*)/ );
46 if (presto_version) presto_version = Number(presto_version[1]);
47 if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
48 // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
49 var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || pre sto_version < 12.11));
50 var captureRightClick = gecko || (ie && !ie_upto8);
51
52 // Optimize some code when these features are not used.
53 var sawReadOnlySpans = false, sawCollapsedSpans = false;
54
55 // EDITOR CONSTRUCTOR
56
57 // A CodeMirror instance represents an editor. This is the object
58 // that user code is usually dealing with.
59
60 function CodeMirror(place, options) {
61 if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
62
63 this.options = options = options || {};
64 // Determine effective options based on given values and defaults.
65 copyObj(defaults, options, false);
66 setGuttersForLineNumbers(options);
67
68 var doc = options.value;
69 if (typeof doc == "string") doc = new Doc(doc, options.mode);
70 this.doc = doc;
71
72 var display = this.display = new Display(place, doc);
73 display.wrapper.CodeMirror = this;
74 updateGutters(this);
75 themeChanged(this);
76 if (options.lineWrapping)
77 this.display.wrapper.className += " CodeMirror-wrap";
78 if (options.autofocus && !mobile) focusInput(this);
79
80 this.state = {
81 keyMaps: [], // stores maps added by addKeyMap
82 overlays: [], // highlighting overlays, as added by addOverlay
83 modeGen: 0, // bumped when mode/overlay changes, used to invalidate high lighting info
84 overwrite: false, focused: false,
85 suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
86 pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edit s in readInput
87 draggingText: false,
88 highlight: new Delayed() // stores highlight worker timeout
89 };
90
91 // Override magic textarea content restore that IE sometimes does
92 // on our hidden textarea on reload
93 if (ie_upto10) setTimeout(bind(resetInput, this, true), 20);
94
95 registerEventHandlers(this);
96
97 var cm = this;
98 runInOp(this, function() {
99 cm.curOp.forceUpdate = true;
100 attachDoc(cm, doc);
101
102 if ((options.autofocus && !mobile) || activeElt() == display.input)
103 setTimeout(bind(onFocus, cm), 20);
104 else
105 onBlur(cm);
106
107 for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
108 optionHandlers[opt](cm, options[opt], Init);
109 for (var i = 0; i < initHooks.length; ++i) initHooks[i](cm);
110 });
111 }
112
113 // DISPLAY CONSTRUCTOR
114
115 // The display handles the DOM integration, both for input reading
116 // and content drawing. It holds references to DOM nodes and
117 // display-related state.
118
119 function Display(place, doc) {
120 var d = this;
121
122 // The semihidden textarea that is focused when the editor is
123 // focused, and receives input.
124 var input = d.input = elt("textarea", null, null, "position: absolute; paddi ng: 0; width: 1px; height: 1em; outline: none");
125 // The textarea is kept positioned near the cursor to prevent the
126 // fact that it'll be scrolled into view on input from scrolling
127 // our fake cursor out of view. On webkit, when wrap=off, paste is
128 // very slow. So make the area wide instead.
129 if (webkit) input.style.width = "1000px";
130 else input.setAttribute("wrap", "off");
131 // If border: 0; -- iOS fails to open keyboard (issue #1287)
132 if (ios) input.style.border = "1px solid black";
133 input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize ", "off"); input.setAttribute("spellcheck", "false");
134
135 // Wraps and hides input textarea
136 d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative ; width: 3px; height: 0px;");
137 // The fake scrollbar elements.
138 d.scrollbarH = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
139 d.scrollbarV = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeM irror-vscrollbar");
140 // Covers bottom-right square when both scrollbars are present.
141 d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
142 // Covers bottom of gutter when coverGutterNextToScrollbar is on
143 // and h scrollbar is present.
144 d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
145 // Will contain the actual code, positioned to cover the viewport.
146 d.lineDiv = elt("div", null, "CodeMirror-code");
147 // Elements are added to these to represent selection and cursors.
148 d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
149 d.cursorDiv = elt("div", null, "CodeMirror-cursors");
150 // A visibility: hidden element used to find the size of things.
151 d.measure = elt("div", null, "CodeMirror-measure");
152 // When lines outside of the viewport are measured, they are drawn in this.
153 d.lineMeasure = elt("div", null, "CodeMirror-measure");
154 // Wraps everything that needs to exist inside the vertically-padded coordin ate system
155 d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursor Div, d.lineDiv],
156 null, "position: relative; outline: none");
157 // Moved around its parent to cover visible view.
158 d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
159 // Set to the height of the document, allowing scrolling.
160 d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
161 // Behavior of elts with overflow: auto and padding is
162 // inconsistent across browsers. This is used to ensure the
163 // scrollable area is big enough.
164 d.heightForcer = elt("div", null, null, "position: absolute; height: " + scr ollerCutOff + "px; width: 1px;");
165 // Will contain the gutters, if any.
166 d.gutters = elt("div", null, "CodeMirror-gutters");
167 d.lineGutter = null;
168 // Actual scrollable element.
169 d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-sc roll");
170 d.scroller.setAttribute("tabIndex", "-1");
171 // The element in which the editor lives.
172 d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV,
173 d.scrollbarFiller, d.gutterFiller, d.scroller], "Cod eMirror");
174
175 // Work around IE7 z-index bug (not perfect, hence IE7 not really being supp orted)
176 if (ie_upto7) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
177 // Needed to hide big blue blinking cursor on Mobile Safari
178 if (ios) input.style.width = "0px";
179 if (!webkit) d.scroller.draggable = true;
180 // Needed to handle Tab key in KHTML
181 if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "a bsolute"; }
182 // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
183 if (ie_upto7) d.scrollbarH.style.minHeight = d.scrollbarV.style.minWidth = " 18px";
184
185 if (place.appendChild) place.appendChild(d.wrapper);
186 else place(d.wrapper);
187
188 // Current rendered range (may be bigger than the view window).
189 d.viewFrom = d.viewTo = doc.first;
190 // Information about the rendered lines.
191 d.view = [];
192 // Holds info about a single rendered line when it was rendered
193 // for measurement, while not in view.
194 d.externalMeasured = null;
195 // Empty space (in pixels) above the view
196 d.viewOffset = 0;
197 d.lastSizeC = 0;
198 d.updateLineNumbers = null;
199
200 // Used to only resize the line number gutter when necessary (when
201 // the amount of lines crosses a boundary that makes its width change)
202 d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
203 // See readInput and resetInput
204 d.prevInput = "";
205 // Set to true when a non-horizontal-scrolling line widget is
206 // added. As an optimization, line widget aligning is skipped when
207 // this is false.
208 d.alignWidgets = false;
209 // Flag that indicates whether we expect input to appear real soon
210 // now (after some event like 'keypress' or 'input') and are
211 // polling intensively.
212 d.pollingFast = false;
213 // Self-resetting timeout for the poller
214 d.poll = new Delayed();
215
216 d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
217
218 // Tracks when resetInput has punted to just putting a short
219 // string into the textarea instead of the full selection.
220 d.inaccurateSelection = false;
221
222 // Tracks the maximum line length so that the horizontal scrollbar
223 // can be kept static when scrolling.
224 d.maxLine = null;
225 d.maxLineLength = 0;
226 d.maxLineChanged = false;
227
228 // Used for measuring wheel scrolling granularity
229 d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
230
231 // True when shift is held down.
232 d.shift = false;
233 }
234
235 // STATE UPDATES
236
237 // Used to get the editor into a consistent state again when options change.
238
239 function loadMode(cm) {
240 cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
241 resetModeState(cm);
242 }
243
244 function resetModeState(cm) {
245 cm.doc.iter(function(line) {
246 if (line.stateAfter) line.stateAfter = null;
247 if (line.styles) line.styles = null;
248 });
249 cm.doc.frontier = cm.doc.first;
250 startWorker(cm, 100);
251 cm.state.modeGen++;
252 if (cm.curOp) regChange(cm);
253 }
254
255 function wrappingChanged(cm) {
256 if (cm.options.lineWrapping) {
257 addClass(cm.display.wrapper, "CodeMirror-wrap");
258 cm.display.sizer.style.minWidth = "";
259 } else {
260 rmClass(cm.display.wrapper, "CodeMirror-wrap");
261 findMaxLine(cm);
262 }
263 estimateLineHeights(cm);
264 regChange(cm);
265 clearCaches(cm);
266 setTimeout(function(){updateScrollbars(cm);}, 100);
267 }
268
269 // Returns a function that estimates the height of a line, to use as
270 // first approximation until the line becomes visible (and is thus
271 // properly measurable).
272 function estimateHeight(cm) {
273 var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
274 var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / char Width(cm.display) - 3);
275 return function(line) {
276 if (lineIsHidden(cm.doc, line)) return 0;
277
278 var widgetsHeight = 0;
279 if (line.widgets) for (var i = 0; i < line.widgets.length; i++) {
280 if (line.widgets[i].height) widgetsHeight += line.widgets[i].height;
281 }
282
283 if (wrapping)
284 return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th ;
285 else
286 return widgetsHeight + th;
287 };
288 }
289
290 function estimateLineHeights(cm) {
291 var doc = cm.doc, est = estimateHeight(cm);
292 doc.iter(function(line) {
293 var estHeight = est(line);
294 if (estHeight != line.height) updateLineHeight(line, estHeight);
295 });
296 }
297
298 function keyMapChanged(cm) {
299 var map = keyMap[cm.options.keyMap], style = map.style;
300 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-k eymap-\S+/g, "") +
301 (style ? " cm-keymap-" + style : "");
302 }
303
304 function themeChanged(cm) {
305 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s -\S+/g, "") +
306 cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
307 clearCaches(cm);
308 }
309
310 function guttersChanged(cm) {
311 updateGutters(cm);
312 regChange(cm);
313 setTimeout(function(){alignHorizontally(cm);}, 20);
314 }
315
316 // Rebuild the gutter elements, ensure the margin to the left of the
317 // code matches their width.
318 function updateGutters(cm) {
319 var gutters = cm.display.gutters, specs = cm.options.gutters;
320 removeChildren(gutters);
321 for (var i = 0; i < specs.length; ++i) {
322 var gutterClass = specs[i];
323 var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gut terClass));
324 if (gutterClass == "CodeMirror-linenumbers") {
325 cm.display.lineGutter = gElt;
326 gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
327 }
328 }
329 gutters.style.display = i ? "" : "none";
330 updateGutterSpace(cm);
331 }
332
333 function updateGutterSpace(cm) {
334 var width = cm.display.gutters.offsetWidth;
335 cm.display.sizer.style.marginLeft = width + "px";
336 cm.display.scrollbarH.style.left = cm.options.fixedGutter ? width + "px" : 0 ;
337 }
338
339 // Compute the character length of a line, taking into account
340 // collapsed ranges (see markText) that might hide parts, and join
341 // other lines onto it.
342 function lineLength(line) {
343 if (line.height == 0) return 0;
344 var len = line.text.length, merged, cur = line;
345 while (merged = collapsedSpanAtStart(cur)) {
346 var found = merged.find(0, true);
347 cur = found.from.line;
348 len += found.from.ch - found.to.ch;
349 }
350 cur = line;
351 while (merged = collapsedSpanAtEnd(cur)) {
352 var found = merged.find(0, true);
353 len -= cur.text.length - found.from.ch;
354 cur = found.to.line;
355 len += cur.text.length - found.to.ch;
356 }
357 return len;
358 }
359
360 // Find the longest line in the document.
361 function findMaxLine(cm) {
362 var d = cm.display, doc = cm.doc;
363 d.maxLine = getLine(doc, doc.first);
364 d.maxLineLength = lineLength(d.maxLine);
365 d.maxLineChanged = true;
366 doc.iter(function(line) {
367 var len = lineLength(line);
368 if (len > d.maxLineLength) {
369 d.maxLineLength = len;
370 d.maxLine = line;
371 }
372 });
373 }
374
375 // Make sure the gutters options contains the element
376 // "CodeMirror-linenumbers" when the lineNumbers option is true.
377 function setGuttersForLineNumbers(options) {
378 var found = indexOf(options.gutters, "CodeMirror-linenumbers");
379 if (found == -1 && options.lineNumbers) {
380 options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
381 } else if (found > -1 && !options.lineNumbers) {
382 options.gutters = options.gutters.slice(0);
383 options.gutters.splice(found, 1);
384 }
385 }
386
387 // SCROLLBARS
388
389 // Prepare DOM reads needed to update the scrollbars. Done in one
390 // shot to minimize update/measure roundtrips.
391 function measureForScrollbars(cm) {
392 var scroll = cm.display.scroller;
393 return {
394 clientHeight: scroll.clientHeight,
395 barHeight: cm.display.scrollbarV.clientHeight,
396 scrollWidth: scroll.scrollWidth, clientWidth: scroll.clientWidth,
397 barWidth: cm.display.scrollbarH.clientWidth,
398 docHeight: Math.round(cm.doc.height + paddingVert(cm.display))
399 };
400 }
401
402 // Re-synchronize the fake scrollbars with the actual size of the
403 // content.
404 function updateScrollbars(cm, measure) {
405 if (!measure) measure = measureForScrollbars(cm);
406 var d = cm.display;
407 var scrollHeight = measure.docHeight + scrollerCutOff;
408 var needsH = measure.scrollWidth > measure.clientWidth;
409 var needsV = scrollHeight > measure.clientHeight;
410 if (needsV) {
411 d.scrollbarV.style.display = "block";
412 d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0 ";
413 // A bug in IE8 can cause this value to be negative, so guard it.
414 d.scrollbarV.firstChild.style.height =
415 Math.max(0, scrollHeight - measure.clientHeight + (measure.barHeight || d.scrollbarV.clientHeight)) + "px";
416 } else {
417 d.scrollbarV.style.display = "";
418 d.scrollbarV.firstChild.style.height = "0";
419 }
420 if (needsH) {
421 d.scrollbarH.style.display = "block";
422 d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0" ;
423 d.scrollbarH.firstChild.style.width =
424 (measure.scrollWidth - measure.clientWidth + (measure.barWidth || d.scro llbarH.clientWidth)) + "px";
425 } else {
426 d.scrollbarH.style.display = "";
427 d.scrollbarH.firstChild.style.width = "0";
428 }
429 if (needsH && needsV) {
430 d.scrollbarFiller.style.display = "block";
431 d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbar Width(d.measure) + "px";
432 } else d.scrollbarFiller.style.display = "";
433 if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutte r) {
434 d.gutterFiller.style.display = "block";
435 d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px";
436 d.gutterFiller.style.width = d.gutters.offsetWidth + "px";
437 } else d.gutterFiller.style.display = "";
438
439 if (!cm.state.checkedOverlayScrollbar && measure.clientHeight > 0) {
440 if (scrollbarWidth(d.measure) === 0) {
441 var w = mac && !mac_geMountainLion ? "12px" : "18px";
442 d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = w;
443 var barMouseDown = function(e) {
444 if (e_target(e) != d.scrollbarV && e_target(e) != d.scrollbarH)
445 operation(cm, onMouseDown)(e);
446 };
447 on(d.scrollbarV, "mousedown", barMouseDown);
448 on(d.scrollbarH, "mousedown", barMouseDown);
449 }
450 cm.state.checkedOverlayScrollbar = true;
451 }
452 }
453
454 // Compute the lines that are visible in a given viewport (defaults
455 // the the current scroll position). viewPort may contain top,
456 // height, and ensure (see op.scrollToPos) properties.
457 function visibleLines(display, doc, viewPort) {
458 var top = viewPort && viewPort.top != null ? viewPort.top : display.scroller .scrollTop;
459 top = Math.floor(top - paddingTop(display));
460 var bottom = viewPort && viewPort.bottom != null ? viewPort.bottom : top + d isplay.wrapper.clientHeight;
461
462 var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
463 // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
464 // forces those lines into the viewport (if possible).
465 if (viewPort && viewPort.ensure) {
466 var ensureFrom = viewPort.ensure.from.line, ensureTo = viewPort.ensure.to. line;
467 if (ensureFrom < from)
468 return {from: ensureFrom,
469 to: lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + d isplay.wrapper.clientHeight)};
470 if (Math.min(ensureTo, doc.lastLine()) >= to)
471 return {from: lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - d isplay.wrapper.clientHeight),
472 to: ensureTo};
473 }
474 return {from: from, to: to};
475 }
476
477 // LINE NUMBERS
478
479 // Re-align line numbers and gutter marks to compensate for
480 // horizontal scrolling.
481 function alignHorizontally(cm) {
482 var display = cm.display, view = display.view;
483 if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fix edGutter)) return;
484 var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm. doc.scrollLeft;
485 var gutterW = display.gutters.offsetWidth, left = comp + "px";
486 for (var i = 0; i < view.length; i++) if (!view[i].hidden) {
487 if (cm.options.fixedGutter && view[i].gutter)
488 view[i].gutter.style.left = left;
489 var align = view[i].alignable;
490 if (align) for (var j = 0; j < align.length; j++)
491 align[j].style.left = left;
492 }
493 if (cm.options.fixedGutter)
494 display.gutters.style.left = (comp + gutterW) + "px";
495 }
496
497 // Used to ensure that the line number gutter is still the right
498 // size for the current document size. Returns true when an update
499 // is needed.
500 function maybeUpdateLineNumberWidth(cm) {
501 if (!cm.options.lineNumbers) return false;
502 var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1) , display = cm.display;
503 if (last.length != display.lineNumChars) {
504 var test = display.measure.appendChild(elt("div", [elt("div", last)],
505 "CodeMirror-linenumber CodeMirr or-gutter-elt"));
506 var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - inn erW;
507 display.lineGutter.style.width = "";
508 display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidt h - padding);
509 display.lineNumWidth = display.lineNumInnerWidth + padding;
510 display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
511 display.lineGutter.style.width = display.lineNumWidth + "px";
512 updateGutterSpace(cm);
513 return true;
514 }
515 return false;
516 }
517
518 function lineNumberFor(options, i) {
519 return String(options.lineNumberFormatter(i + options.firstLineNumber));
520 }
521
522 // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
523 // but using getBoundingClientRect to get a sub-pixel-accurate
524 // result.
525 function compensateForHScroll(display) {
526 return display.scroller.getBoundingClientRect().left - display.sizer.getBoun dingClientRect().left;
527 }
528
529 // DISPLAY DRAWING
530
531 // Updates the display, selection, and scrollbars, using the
532 // information in display.view to find out which nodes are no longer
533 // up-to-date. Tries to bail out early when no changes are needed,
534 // unless forced is true.
535 // Returns true if an actual update happened, false otherwise.
536 function updateDisplay(cm, viewPort, forced) {
537 var oldFrom = cm.display.viewFrom, oldTo = cm.display.viewTo, updated;
538 var visible = visibleLines(cm.display, cm.doc, viewPort);
539 for (var first = true;; first = false) {
540 var oldWidth = cm.display.scroller.clientWidth;
541 if (!updateDisplayInner(cm, visible, forced)) break;
542 updated = true;
543
544 // If the max line changed since it was last measured, measure it,
545 // and ensure the document's width matches it.
546 if (cm.display.maxLineChanged && !cm.options.lineWrapping)
547 adjustContentWidth(cm);
548
549 var barMeasure = measureForScrollbars(cm);
550 updateSelection(cm);
551 setDocumentHeight(cm, barMeasure);
552 updateScrollbars(cm, barMeasure);
553 if (webkit && cm.options.lineWrapping)
554 checkForWebkitWidthBug(cm, barMeasure); // (Issue #2420)
555 if (first && cm.options.lineWrapping && oldWidth != cm.display.scroller.cl ientWidth) {
556 forced = true;
557 continue;
558 }
559 forced = false;
560
561 // Clip forced viewport to actual scrollable area.
562 if (viewPort && viewPort.top != null)
563 viewPort = {top: Math.min(barMeasure.docHeight - scrollerCutOff - barMea sure.clientHeight, viewPort.top)};
564 // Updated line heights might result in the drawn area not
565 // actually covering the viewport. Keep looping until it does.
566 visible = visibleLines(cm.display, cm.doc, viewPort);
567 if (visible.from >= cm.display.viewFrom && visible.to <= cm.display.viewTo )
568 break;
569 }
570
571 cm.display.updateLineNumbers = null;
572 if (updated) {
573 signalLater(cm, "update", cm);
574 if (cm.display.viewFrom != oldFrom || cm.display.viewTo != oldTo)
575 signalLater(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.vi ewTo);
576 }
577 return updated;
578 }
579
580 // Does the actual updating of the line display. Bails out
581 // (returning false) when there is nothing to be done and forced is
582 // false.
583 function updateDisplayInner(cm, visible, forced) {
584 var display = cm.display, doc = cm.doc;
585 if (!display.wrapper.offsetWidth) {
586 resetView(cm);
587 return;
588 }
589
590 // Bail out if the visible area is already rendered and nothing changed.
591 if (!forced && visible.from >= display.viewFrom && visible.to <= display.vie wTo &&
592 countDirtyView(cm) == 0)
593 return;
594
595 if (maybeUpdateLineNumberWidth(cm))
596 resetView(cm);
597 var dims = getDimensions(cm);
598
599 // Compute a suitable new viewport (from & to)
600 var end = doc.first + doc.size;
601 var from = Math.max(visible.from - cm.options.viewportMargin, doc.first);
602 var to = Math.min(end, visible.to + cm.options.viewportMargin);
603 if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max (doc.first, display.viewFrom);
604 if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, disp lay.viewTo);
605 if (sawCollapsedSpans) {
606 from = visualLineNo(cm.doc, from);
607 to = visualLineEndNo(cm.doc, to);
608 }
609
610 var different = from != display.viewFrom || to != display.viewTo ||
611 display.lastSizeC != display.wrapper.clientHeight;
612 adjustView(cm, from, to);
613
614 display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
615 // Position the mover div to align with the current scroll position
616 cm.display.mover.style.top = display.viewOffset + "px";
617
618 var toUpdate = countDirtyView(cm);
619 if (!different && toUpdate == 0 && !forced) return;
620
621 // For big changes, we hide the enclosing element during the
622 // update, since that speeds up the operations on most browsers.
623 var focused = activeElt();
624 if (toUpdate > 4) display.lineDiv.style.display = "none";
625 patchDisplay(cm, display.updateLineNumbers, dims);
626 if (toUpdate > 4) display.lineDiv.style.display = "";
627 // There might have been a widget with a focused element that got
628 // hidden or updated, if so re-focus it.
629 if (focused && activeElt() != focused && focused.offsetHeight) focused.focus ();
630
631 // Prevent selection and cursors from interfering with the scroll
632 // width.
633 removeChildren(display.cursorDiv);
634 removeChildren(display.selectionDiv);
635
636 if (different) {
637 display.lastSizeC = display.wrapper.clientHeight;
638 startWorker(cm, 400);
639 }
640
641 updateHeightsInViewport(cm);
642
643 return true;
644 }
645
646 function adjustContentWidth(cm) {
647 var display = cm.display;
648 var width = measureChar(cm, display.maxLine, display.maxLine.text.length).le ft;
649 display.maxLineChanged = false;
650 var minWidth = Math.max(0, width + 3);
651 var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + minWidth + scroll erCutOff - display.scroller.clientWidth);
652 display.sizer.style.minWidth = minWidth + "px";
653 if (maxScrollLeft < cm.doc.scrollLeft)
654 setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), tr ue);
655 }
656
657 function setDocumentHeight(cm, measure) {
658 cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = measu re.docHeight + "px";
659 cm.display.gutters.style.height = Math.max(measure.docHeight, measure.client Height - scrollerCutOff) + "px";
660 }
661
662
663 function checkForWebkitWidthBug(cm, measure) {
664 // Work around Webkit bug where it sometimes reserves space for a
665 // non-existing phantom scrollbar in the scroller (Issue #2420)
666 if (cm.display.sizer.offsetWidth + cm.display.gutters.offsetWidth < cm.displ ay.scroller.clientWidth - 1) {
667 cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = "0p x";
668 cm.display.gutters.style.height = measure.docHeight + "px";
669 }
670 }
671
672 // Read the actual heights of the rendered lines, and update their
673 // stored heights to match.
674 function updateHeightsInViewport(cm) {
675 var display = cm.display;
676 var prevBottom = display.lineDiv.offsetTop;
677 for (var i = 0; i < display.view.length; i++) {
678 var cur = display.view[i], height;
679 if (cur.hidden) continue;
680 if (ie_upto7) {
681 var bot = cur.node.offsetTop + cur.node.offsetHeight;
682 height = bot - prevBottom;
683 prevBottom = bot;
684 } else {
685 var box = cur.node.getBoundingClientRect();
686 height = box.bottom - box.top;
687 }
688 var diff = cur.line.height - height;
689 if (height < 2) height = textHeight(display);
690 if (diff > .001 || diff < -.001) {
691 updateLineHeight(cur.line, height);
692 updateWidgetHeight(cur.line);
693 if (cur.rest) for (var j = 0; j < cur.rest.length; j++)
694 updateWidgetHeight(cur.rest[j]);
695 }
696 }
697 }
698
699 // Read and store the height of line widgets associated with the
700 // given line.
701 function updateWidgetHeight(line) {
702 if (line.widgets) for (var i = 0; i < line.widgets.length; ++i)
703 line.widgets[i].height = line.widgets[i].node.offsetHeight;
704 }
705
706 // Do a bulk-read of the DOM positions and sizes needed to draw the
707 // view, so that we don't interleave reading and writing to the DOM.
708 function getDimensions(cm) {
709 var d = cm.display, left = {}, width = {};
710 for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
711 left[cm.options.gutters[i]] = n.offsetLeft;
712 width[cm.options.gutters[i]] = n.offsetWidth;
713 }
714 return {fixedPos: compensateForHScroll(d),
715 gutterTotalWidth: d.gutters.offsetWidth,
716 gutterLeft: left,
717 gutterWidth: width,
718 wrapperWidth: d.wrapper.clientWidth};
719 }
720
721 // Sync the actual display DOM structure with display.view, removing
722 // nodes for lines that are no longer in view, and creating the ones
723 // that are not there yet, and updating the ones that are out of
724 // date.
725 function patchDisplay(cm, updateNumbersFrom, dims) {
726 var display = cm.display, lineNumbers = cm.options.lineNumbers;
727 var container = display.lineDiv, cur = container.firstChild;
728
729 function rm(node) {
730 var next = node.nextSibling;
731 // Works around a throw-scroll bug in OS X Webkit
732 if (webkit && mac && cm.display.currentWheelTarget == node)
733 node.style.display = "none";
734 else
735 node.parentNode.removeChild(node);
736 return next;
737 }
738
739 var view = display.view, lineN = display.viewFrom;
740 // Loop over the elements in the view, syncing cur (the DOM nodes
741 // in display.lineDiv) with the view as we go.
742 for (var i = 0; i < view.length; i++) {
743 var lineView = view[i];
744 if (lineView.hidden) {
745 } else if (!lineView.node) { // Not drawn yet
746 var node = buildLineElement(cm, lineView, lineN, dims);
747 container.insertBefore(node, cur);
748 } else { // Already drawn
749 while (cur != lineView.node) cur = rm(cur);
750 var updateNumber = lineNumbers && updateNumbersFrom != null &&
751 updateNumbersFrom <= lineN && lineView.lineNumber;
752 if (lineView.changes) {
753 if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false;
754 updateLineForChanges(cm, lineView, lineN, dims);
755 }
756 if (updateNumber) {
757 removeChildren(lineView.lineNumber);
758 lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor( cm.options, lineN)));
759 }
760 cur = lineView.node.nextSibling;
761 }
762 lineN += lineView.size;
763 }
764 while (cur) cur = rm(cur);
765 }
766
767 // When an aspect of a line changes, a string is added to
768 // lineView.changes. This updates the relevant part of the line's
769 // DOM structure.
770 function updateLineForChanges(cm, lineView, lineN, dims) {
771 for (var j = 0; j < lineView.changes.length; j++) {
772 var type = lineView.changes[j];
773 if (type == "text") updateLineText(cm, lineView);
774 else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims);
775 else if (type == "class") updateLineClasses(lineView);
776 else if (type == "widget") updateLineWidgets(lineView, dims);
777 }
778 lineView.changes = null;
779 }
780
781 // Lines with gutter elements, widgets or a background class need to
782 // be wrapped, and have the extra elements added to the wrapper div
783 function ensureLineWrapped(lineView) {
784 if (lineView.node == lineView.text) {
785 lineView.node = elt("div", null, null, "position: relative");
786 if (lineView.text.parentNode)
787 lineView.text.parentNode.replaceChild(lineView.node, lineView.text);
788 lineView.node.appendChild(lineView.text);
789 if (ie_upto7) lineView.node.style.zIndex = 2;
790 }
791 return lineView.node;
792 }
793
794 function updateLineBackground(lineView) {
795 var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
796 if (cls) cls += " CodeMirror-linebackground";
797 if (lineView.background) {
798 if (cls) lineView.background.className = cls;
799 else { lineView.background.parentNode.removeChild(lineView.background); li neView.background = null; }
800 } else if (cls) {
801 var wrap = ensureLineWrapped(lineView);
802 lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstC hild);
803 }
804 }
805
806 // Wrapper around buildLineContent which will reuse the structure
807 // in display.externalMeasured when possible.
808 function getLineContent(cm, lineView) {
809 var ext = cm.display.externalMeasured;
810 if (ext && ext.line == lineView.line) {
811 cm.display.externalMeasured = null;
812 lineView.measure = ext.measure;
813 return ext.built;
814 }
815 return buildLineContent(cm, lineView);
816 }
817
818 // Redraw the line's text. Interacts with the background and text
819 // classes because the mode may output tokens that influence these
820 // classes.
821 function updateLineText(cm, lineView) {
822 var cls = lineView.text.className;
823 var built = getLineContent(cm, lineView);
824 if (lineView.text == lineView.node) lineView.node = built.pre;
825 lineView.text.parentNode.replaceChild(built.pre, lineView.text);
826 lineView.text = built.pre;
827 if (built.bgClass != lineView.bgClass || built.textClass != lineView.textCla ss) {
828 lineView.bgClass = built.bgClass;
829 lineView.textClass = built.textClass;
830 updateLineClasses(lineView);
831 } else if (cls) {
832 lineView.text.className = cls;
833 }
834 }
835
836 function updateLineClasses(lineView) {
837 updateLineBackground(lineView);
838 if (lineView.line.wrapClass)
839 ensureLineWrapped(lineView).className = lineView.line.wrapClass;
840 else if (lineView.node != lineView.text)
841 lineView.node.className = "";
842 var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.li ne.textClass || "") : lineView.line.textClass;
843 lineView.text.className = textClass || "";
844 }
845
846 function updateLineGutter(cm, lineView, lineN, dims) {
847 if (lineView.gutter) {
848 lineView.node.removeChild(lineView.gutter);
849 lineView.gutter = null;
850 }
851 var markers = lineView.line.gutterMarkers;
852 if (cm.options.lineNumbers || markers) {
853 var wrap = ensureLineWrapped(lineView);
854 var gutterWrap = lineView.gutter =
855 wrap.insertBefore(elt("div", null, "CodeMirror-gutter-wrapper", "positio n: absolute; left: " +
856 (cm.options.fixedGutter ? dims.fixedPos : -dims.gu tterTotalWidth) + "px"),
857 lineView.text);
858 if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumber s"]))
859 lineView.lineNumber = gutterWrap.appendChild(
860 elt("div", lineNumberFor(cm.options, lineN),
861 "CodeMirror-linenumber CodeMirror-gutter-elt",
862 "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
863 + cm.display.lineNumInnerWidth + "px"));
864 if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) {
865 var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && ma rkers[id];
866 if (found)
867 gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "l eft: " +
868 dims.gutterLeft[id] + "px; width: " + dims. gutterWidth[id] + "px"));
869 }
870 }
871 }
872
873 function updateLineWidgets(lineView, dims) {
874 if (lineView.alignable) lineView.alignable = null;
875 for (var node = lineView.node.firstChild, next; node; node = next) {
876 var next = node.nextSibling;
877 if (node.className == "CodeMirror-linewidget")
878 lineView.node.removeChild(node);
879 }
880 insertLineWidgets(lineView, dims);
881 }
882
883 // Build a line's DOM representation from scratch
884 function buildLineElement(cm, lineView, lineN, dims) {
885 var built = getLineContent(cm, lineView);
886 lineView.text = lineView.node = built.pre;
887 if (built.bgClass) lineView.bgClass = built.bgClass;
888 if (built.textClass) lineView.textClass = built.textClass;
889
890 updateLineClasses(lineView);
891 updateLineGutter(cm, lineView, lineN, dims);
892 insertLineWidgets(lineView, dims);
893 return lineView.node;
894 }
895
896 // A lineView may contain multiple logical lines (when merged by
897 // collapsed spans). The widgets for all of them need to be drawn.
898 function insertLineWidgets(lineView, dims) {
899 insertLineWidgetsFor(lineView.line, lineView, dims, true);
900 if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
901 insertLineWidgetsFor(lineView.rest[i], lineView, dims, false);
902 }
903
904 function insertLineWidgetsFor(line, lineView, dims, allowAbove) {
905 if (!line.widgets) return;
906 var wrap = ensureLineWrapped(lineView);
907 for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
908 var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidge t");
909 if (!widget.handleMouseEvents) node.ignoreEvents = true;
910 positionLineWidget(widget, node, lineView, dims);
911 if (allowAbove && widget.above)
912 wrap.insertBefore(node, lineView.gutter || lineView.text);
913 else
914 wrap.appendChild(node);
915 signalLater(widget, "redraw");
916 }
917 }
918
919 function positionLineWidget(widget, node, lineView, dims) {
920 if (widget.noHScroll) {
921 (lineView.alignable || (lineView.alignable = [])).push(node);
922 var width = dims.wrapperWidth;
923 node.style.left = dims.fixedPos + "px";
924 if (!widget.coverGutter) {
925 width -= dims.gutterTotalWidth;
926 node.style.paddingLeft = dims.gutterTotalWidth + "px";
927 }
928 node.style.width = width + "px";
929 }
930 if (widget.coverGutter) {
931 node.style.zIndex = 5;
932 node.style.position = "relative";
933 if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "p x";
934 }
935 }
936
937 // POSITION OBJECT
938
939 // A Pos instance represents a position within the text.
940 var Pos = CodeMirror.Pos = function(line, ch) {
941 if (!(this instanceof Pos)) return new Pos(line, ch);
942 this.line = line; this.ch = ch;
943 };
944
945 // Compare two positions, return 0 if they are the same, a negative
946 // number when a is less, and a positive number otherwise.
947 var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch - b.ch; };
948
949 function copyPos(x) {return Pos(x.line, x.ch);}
950 function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; }
951 function minPos(a, b) { return cmp(a, b) < 0 ? a : b; }
952
953 // SELECTION / CURSOR
954
955 // Selection objects are immutable. A new one is created every time
956 // the selection changes. A selection is one or more non-overlapping
957 // (and non-touching) ranges, sorted, and an integer that indicates
958 // which one is the primary selection (the one that's scrolled into
959 // view, that getCursor returns, etc).
960 function Selection(ranges, primIndex) {
961 this.ranges = ranges;
962 this.primIndex = primIndex;
963 }
964
965 Selection.prototype = {
966 primary: function() { return this.ranges[this.primIndex]; },
967 equals: function(other) {
968 if (other == this) return true;
969 if (other.primIndex != this.primIndex || other.ranges.length != this.range s.length) return false;
970 for (var i = 0; i < this.ranges.length; i++) {
971 var here = this.ranges[i], there = other.ranges[i];
972 if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) return false;
973 }
974 return true;
975 },
976 deepCopy: function() {
977 for (var out = [], i = 0; i < this.ranges.length; i++)
978 out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i ].head));
979 return new Selection(out, this.primIndex);
980 },
981 somethingSelected: function() {
982 for (var i = 0; i < this.ranges.length; i++)
983 if (!this.ranges[i].empty()) return true;
984 return false;
985 },
986 contains: function(pos, end) {
987 if (!end) end = pos;
988 for (var i = 0; i < this.ranges.length; i++) {
989 var range = this.ranges[i];
990 if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
991 return i;
992 }
993 return -1;
994 }
995 };
996
997 function Range(anchor, head) {
998 this.anchor = anchor; this.head = head;
999 }
1000
1001 Range.prototype = {
1002 from: function() { return minPos(this.anchor, this.head); },
1003 to: function() { return maxPos(this.anchor, this.head); },
1004 empty: function() {
1005 return this.head.line == this.anchor.line && this.head.ch == this.anchor.c h;
1006 }
1007 };
1008
1009 // Take an unsorted, potentially overlapping set of ranges, and
1010 // build a selection out of it. 'Consumes' ranges array (modifying
1011 // it).
1012 function normalizeSelection(ranges, primIndex) {
1013 var prim = ranges[primIndex];
1014 ranges.sort(function(a, b) { return cmp(a.from(), b.from()); });
1015 primIndex = indexOf(ranges, prim);
1016 for (var i = 1; i < ranges.length; i++) {
1017 var cur = ranges[i], prev = ranges[i - 1];
1018 if (cmp(prev.to(), cur.from()) >= 0) {
1019 var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.t o());
1020 var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.he ad;
1021 if (i <= primIndex) --primIndex;
1022 ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
1023 }
1024 }
1025 return new Selection(ranges, primIndex);
1026 }
1027
1028 function simpleSelection(anchor, head) {
1029 return new Selection([new Range(anchor, head || anchor)], 0);
1030 }
1031
1032 // Most of the external API clips given positions to make sure they
1033 // actually exist within the document.
1034 function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
1035 function clipPos(doc, pos) {
1036 if (pos.line < doc.first) return Pos(doc.first, 0);
1037 var last = doc.first + doc.size - 1;
1038 if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
1039 return clipToLen(pos, getLine(doc, pos.line).text.length);
1040 }
1041 function clipToLen(pos, linelen) {
1042 var ch = pos.ch;
1043 if (ch == null || ch > linelen) return Pos(pos.line, linelen);
1044 else if (ch < 0) return Pos(pos.line, 0);
1045 else return pos;
1046 }
1047 function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
1048 function clipPosArray(doc, array) {
1049 for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array [i]);
1050 return out;
1051 }
1052
1053 // SELECTION UPDATES
1054
1055 // The 'scroll' parameter given to many of these indicated whether
1056 // the new cursor position should be scrolled into view after
1057 // modifying the selection.
1058
1059 // If shift is held or the extend flag is set, extends a range to
1060 // include a given position (and optionally a second position).
1061 // Otherwise, simply returns the range between the given positions.
1062 // Used for cursor motion and such.
1063 function extendRange(doc, range, head, other) {
1064 if (doc.cm && doc.cm.display.shift || doc.extend) {
1065 var anchor = range.anchor;
1066 if (other) {
1067 var posBefore = cmp(head, anchor) < 0;
1068 if (posBefore != (cmp(other, anchor) < 0)) {
1069 anchor = head;
1070 head = other;
1071 } else if (posBefore != (cmp(head, other) < 0)) {
1072 head = other;
1073 }
1074 }
1075 return new Range(anchor, head);
1076 } else {
1077 return new Range(other || head, head);
1078 }
1079 }
1080
1081 // Extend the primary selection range, discard the rest.
1082 function extendSelection(doc, head, other, options) {
1083 setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, o ther)], 0), options);
1084 }
1085
1086 // Extend all selections (pos is an array of selections with length
1087 // equal the number of selections)
1088 function extendSelections(doc, heads, options) {
1089 for (var out = [], i = 0; i < doc.sel.ranges.length; i++)
1090 out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null);
1091 var newSel = normalizeSelection(out, doc.sel.primIndex);
1092 setSelection(doc, newSel, options);
1093 }
1094
1095 // Updates a single range in the selection.
1096 function replaceOneSelection(doc, i, range, options) {
1097 var ranges = doc.sel.ranges.slice(0);
1098 ranges[i] = range;
1099 setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options);
1100 }
1101
1102 // Reset the selection to a single range.
1103 function setSimpleSelection(doc, anchor, head, options) {
1104 setSelection(doc, simpleSelection(anchor, head), options);
1105 }
1106
1107 // Give beforeSelectionChange handlers a change to influence a
1108 // selection update.
1109 function filterSelectionChange(doc, sel) {
1110 var obj = {
1111 ranges: sel.ranges,
1112 update: function(ranges) {
1113 this.ranges = [];
1114 for (var i = 0; i < ranges.length; i++)
1115 this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
1116 clipPos(doc, ranges[i].head));
1117 }
1118 };
1119 signal(doc, "beforeSelectionChange", doc, obj);
1120 if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
1121 if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.rang es.length - 1);
1122 else return sel;
1123 }
1124
1125 function setSelectionReplaceHistory(doc, sel, options) {
1126 var done = doc.history.done, last = lst(done);
1127 if (last && last.ranges) {
1128 done[done.length - 1] = sel;
1129 setSelectionNoUndo(doc, sel, options);
1130 } else {
1131 setSelection(doc, sel, options);
1132 }
1133 }
1134
1135 // Set a new selection.
1136 function setSelection(doc, sel, options) {
1137 setSelectionNoUndo(doc, sel, options);
1138 addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options) ;
1139 }
1140
1141 function setSelectionNoUndo(doc, sel, options) {
1142 if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
1143 sel = filterSelectionChange(doc, sel);
1144
1145 var bias = cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1;
1146 setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
1147
1148 if (!(options && options.scroll === false) && doc.cm)
1149 ensureCursorVisible(doc.cm);
1150 }
1151
1152 function setSelectionInner(doc, sel) {
1153 if (sel.equals(doc.sel)) return;
1154
1155 doc.sel = sel;
1156
1157 if (doc.cm) {
1158 doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true;
1159 signalCursorActivity(doc.cm);
1160 }
1161 signalLater(doc, "cursorActivity", doc);
1162 }
1163
1164 // Verify that the selection does not partially select any atomic
1165 // marked ranges.
1166 function reCheckSelection(doc) {
1167 setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel _dontScroll);
1168 }
1169
1170 // Return a selection that does not partially select any atomic
1171 // ranges.
1172 function skipAtomicInSelection(doc, sel, bias, mayClear) {
1173 var out;
1174 for (var i = 0; i < sel.ranges.length; i++) {
1175 var range = sel.ranges[i];
1176 var newAnchor = skipAtomic(doc, range.anchor, bias, mayClear);
1177 var newHead = skipAtomic(doc, range.head, bias, mayClear);
1178 if (out || newAnchor != range.anchor || newHead != range.head) {
1179 if (!out) out = sel.ranges.slice(0, i);
1180 out[i] = new Range(newAnchor, newHead);
1181 }
1182 }
1183 return out ? normalizeSelection(out, sel.primIndex) : sel;
1184 }
1185
1186 // Ensure a given position is not inside an atomic range.
1187 function skipAtomic(doc, pos, bias, mayClear) {
1188 var flipped = false, curPos = pos;
1189 var dir = bias || 1;
1190 doc.cantEdit = false;
1191 search: for (;;) {
1192 var line = getLine(doc, curPos.line);
1193 if (line.markedSpans) {
1194 for (var i = 0; i < line.markedSpans.length; ++i) {
1195 var sp = line.markedSpans[i], m = sp.marker;
1196 if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.f rom < curPos.ch)) &&
1197 (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
1198 if (mayClear) {
1199 signal(m, "beforeCursorEnter");
1200 if (m.explicitlyCleared) {
1201 if (!line.markedSpans) break;
1202 else {--i; continue;}
1203 }
1204 }
1205 if (!m.atomic) continue;
1206 var newPos = m.find(dir < 0 ? -1 : 1);
1207 if (cmp(newPos, curPos) == 0) {
1208 newPos.ch += dir;
1209 if (newPos.ch < 0) {
1210 if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.li ne - 1));
1211 else newPos = null;
1212 } else if (newPos.ch > line.text.length) {
1213 if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos. line + 1, 0);
1214 else newPos = null;
1215 }
1216 if (!newPos) {
1217 if (flipped) {
1218 // Driven in a corner -- no valid cursor position found at all
1219 // -- try again *with* clearing, if we didn't already
1220 if (!mayClear) return skipAtomic(doc, pos, bias, true);
1221 // Otherwise, turn off editing until further notice, and retur n the start of the doc
1222 doc.cantEdit = true;
1223 return Pos(doc.first, 0);
1224 }
1225 flipped = true; newPos = pos; dir = -dir;
1226 }
1227 }
1228 curPos = newPos;
1229 continue search;
1230 }
1231 }
1232 }
1233 return curPos;
1234 }
1235 }
1236
1237 // SELECTION DRAWING
1238
1239 // Redraw the selection and/or cursor
1240 function updateSelection(cm) {
1241 var display = cm.display, doc = cm.doc;
1242 var curFragment = document.createDocumentFragment();
1243 var selFragment = document.createDocumentFragment();
1244
1245 for (var i = 0; i < doc.sel.ranges.length; i++) {
1246 var range = doc.sel.ranges[i];
1247 var collapsed = range.empty();
1248 if (collapsed || cm.options.showCursorWhenSelecting)
1249 drawSelectionCursor(cm, range, curFragment);
1250 if (!collapsed)
1251 drawSelectionRange(cm, range, selFragment);
1252 }
1253
1254 // Move the hidden textarea near the cursor to prevent scrolling artifacts
1255 if (cm.options.moveInputWithCursor) {
1256 var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
1257 var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.l ineDiv.getBoundingClientRect();
1258 var top = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
1259 headPos.top + lineOff.top - wrapOff.top));
1260 var left = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
1261 headPos.left + lineOff.left - wrapOff.left ));
1262 display.inputDiv.style.top = top + "px";
1263 display.inputDiv.style.left = left + "px";
1264 }
1265
1266 removeChildrenAndAdd(display.cursorDiv, curFragment);
1267 removeChildrenAndAdd(display.selectionDiv, selFragment);
1268 }
1269
1270 // Draws a cursor for the given range
1271 function drawSelectionCursor(cm, range, output) {
1272 var pos = cursorCoords(cm, range.head, "div");
1273
1274 var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
1275 cursor.style.left = pos.left + "px";
1276 cursor.style.top = pos.top + "px";
1277 cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorH eight + "px";
1278
1279 if (pos.other) {
1280 // Secondary cursor, shown when on a 'jump' in bi-directional text
1281 var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-curs or CodeMirror-secondarycursor"));
1282 otherCursor.style.display = "";
1283 otherCursor.style.left = pos.other.left + "px";
1284 otherCursor.style.top = pos.other.top + "px";
1285 otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px" ;
1286 }
1287 }
1288
1289 // Draws the given range as a highlighted selection
1290 function drawSelectionRange(cm, range, output) {
1291 var display = cm.display, doc = cm.doc;
1292 var fragment = document.createDocumentFragment();
1293 var padding = paddingH(cm.display), leftSide = padding.left, rightSide = dis play.lineSpace.offsetWidth - padding.right;
1294
1295 function add(left, top, width, bottom) {
1296 if (top < 0) top = 0;
1297 top = Math.round(top);
1298 bottom = Math.round(bottom);
1299 fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: ab solute; left: " + left +
1300 "px; top: " + top + "px; width: " + (width == nul l ? rightSide - left : width) +
1301 "px; height: " + (bottom - top) + "px"));
1302 }
1303
1304 function drawForLine(line, fromArg, toArg) {
1305 var lineObj = getLine(doc, line);
1306 var lineLen = lineObj.text.length;
1307 var start, end;
1308 function coords(ch, bias) {
1309 return charCoords(cm, Pos(line, ch), "div", lineObj, bias);
1310 }
1311
1312 iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineL en : toArg, function(from, to, dir) {
1313 var leftPos = coords(from, "left"), rightPos, left, right;
1314 if (from == to) {
1315 rightPos = leftPos;
1316 left = right = leftPos.left;
1317 } else {
1318 rightPos = coords(to - 1, "right");
1319 if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
1320 left = leftPos.left;
1321 right = rightPos.right;
1322 }
1323 if (fromArg == null && from == 0) left = leftSide;
1324 if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
1325 add(left, leftPos.top, null, leftPos.bottom);
1326 left = leftSide;
1327 if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rig htPos.top);
1328 }
1329 if (toArg == null && to == lineLen) right = rightSide;
1330 if (!start || leftPos.top < start.top || leftPos.top == start.top && lef tPos.left < start.left)
1331 start = leftPos;
1332 if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.botto m && rightPos.right > end.right)
1333 end = rightPos;
1334 if (left < leftSide + 1) left = leftSide;
1335 add(left, rightPos.top, right - left, rightPos.bottom);
1336 });
1337 return {start: start, end: end};
1338 }
1339
1340 var sFrom = range.from(), sTo = range.to();
1341 if (sFrom.line == sTo.line) {
1342 drawForLine(sFrom.line, sFrom.ch, sTo.ch);
1343 } else {
1344 var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
1345 var singleVLine = visualLine(fromLine) == visualLine(toLine);
1346 var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.tex t.length + 1 : null).end;
1347 var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).sta rt;
1348 if (singleVLine) {
1349 if (leftEnd.top < rightStart.top - 2) {
1350 add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
1351 add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
1352 } else {
1353 add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftE nd.bottom);
1354 }
1355 }
1356 if (leftEnd.bottom < rightStart.top)
1357 add(leftSide, leftEnd.bottom, null, rightStart.top);
1358 }
1359
1360 output.appendChild(fragment);
1361 }
1362
1363 // Cursor-blinking
1364 function restartBlink(cm) {
1365 if (!cm.state.focused) return;
1366 var display = cm.display;
1367 clearInterval(display.blinker);
1368 var on = true;
1369 display.cursorDiv.style.visibility = "";
1370 if (cm.options.cursorBlinkRate > 0)
1371 display.blinker = setInterval(function() {
1372 display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
1373 }, cm.options.cursorBlinkRate);
1374 }
1375
1376 // HIGHLIGHT WORKER
1377
1378 function startWorker(cm, time) {
1379 if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo)
1380 cm.state.highlight.set(time, bind(highlightWorker, cm));
1381 }
1382
1383 function highlightWorker(cm) {
1384 var doc = cm.doc;
1385 if (doc.frontier < doc.first) doc.frontier = doc.first;
1386 if (doc.frontier >= cm.display.viewTo) return;
1387 var end = +new Date + cm.options.workTime;
1388 var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
1389
1390 runInOp(cm, function() {
1391 doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 50 0), function(line) {
1392 if (doc.frontier >= cm.display.viewFrom) { // Visible
1393 var oldStyles = line.styles;
1394 var highlighted = highlightLine(cm, line, state, true);
1395 line.styles = highlighted.styles;
1396 if (highlighted.classes) line.styleClasses = highlighted.classes;
1397 else if (line.styleClasses) line.styleClasses = null;
1398 var ischange = !oldStyles || oldStyles.length != line.styles.length;
1399 for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldSt yles[i] != line.styles[i];
1400 if (ischange) regLineChange(cm, doc.frontier, "text");
1401 line.stateAfter = copyState(doc.mode, state);
1402 } else {
1403 processLine(cm, line.text, state);
1404 line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : n ull;
1405 }
1406 ++doc.frontier;
1407 if (+new Date > end) {
1408 startWorker(cm, cm.options.workDelay);
1409 return true;
1410 }
1411 });
1412 });
1413 }
1414
1415 // Finds the line to start with when starting a parse. Tries to
1416 // find a line with a stateAfter, so that it can start with a
1417 // valid state. If that fails, it returns the line with the
1418 // smallest indentation, which tends to need the least context to
1419 // parse correctly.
1420 function findStartLine(cm, n, precise) {
1421 var minindent, minline, doc = cm.doc;
1422 var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
1423 for (var search = n; search > lim; --search) {
1424 if (search <= doc.first) return doc.first;
1425 var line = getLine(doc, search - 1);
1426 if (line.stateAfter && (!precise || search <= doc.frontier)) return search ;
1427 var indented = countColumn(line.text, null, cm.options.tabSize);
1428 if (minline == null || minindent > indented) {
1429 minline = search - 1;
1430 minindent = indented;
1431 }
1432 }
1433 return minline;
1434 }
1435
1436 function getStateBefore(cm, n, precise) {
1437 var doc = cm.doc, display = cm.display;
1438 if (!doc.mode.startState) return true;
1439 var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine( doc, pos-1).stateAfter;
1440 if (!state) state = startState(doc.mode);
1441 else state = copyState(doc.mode, state);
1442 doc.iter(pos, n, function(line) {
1443 processLine(cm, line.text, state);
1444 var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo;
1445 line.stateAfter = save ? copyState(doc.mode, state) : null;
1446 ++pos;
1447 });
1448 if (precise) doc.frontier = pos;
1449 return state;
1450 }
1451
1452 // POSITION MEASUREMENT
1453
1454 function paddingTop(display) {return display.lineSpace.offsetTop;}
1455 function paddingVert(display) {return display.mover.offsetHeight - display.lin eSpace.offsetHeight;}
1456 function paddingH(display) {
1457 if (display.cachedPaddingH) return display.cachedPaddingH;
1458 var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
1459 var style = window.getComputedStyle ? window.getComputedStyle(e) : e.current Style;
1460 var data = {left: parseInt(style.paddingLeft), right: parseInt(style.padding Right)};
1461 if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data;
1462 return data;
1463 }
1464
1465 // Ensure the lineView.wrapping.heights array is populated. This is
1466 // an array of bottom offsets for the lines that make up a drawn
1467 // line. When lineWrapping is on, there might be more than one
1468 // height.
1469 function ensureLineHeights(cm, lineView, rect) {
1470 var wrapping = cm.options.lineWrapping;
1471 var curWidth = wrapping && cm.display.scroller.clientWidth;
1472 if (!lineView.measure.heights || wrapping && lineView.measure.width != curWi dth) {
1473 var heights = lineView.measure.heights = [];
1474 if (wrapping) {
1475 lineView.measure.width = curWidth;
1476 var rects = lineView.text.firstChild.getClientRects();
1477 for (var i = 0; i < rects.length - 1; i++) {
1478 var cur = rects[i], next = rects[i + 1];
1479 if (Math.abs(cur.bottom - next.bottom) > 2)
1480 heights.push((cur.bottom + next.top) / 2 - rect.top);
1481 }
1482 }
1483 heights.push(rect.bottom - rect.top);
1484 }
1485 }
1486
1487 // Find a line map (mapping character offsets to text nodes) and a
1488 // measurement cache for the given line number. (A line view might
1489 // contain multiple lines when collapsed ranges are present.)
1490 function mapFromLineView(lineView, line, lineN) {
1491 if (lineView.line == line)
1492 return {map: lineView.measure.map, cache: lineView.measure.cache};
1493 for (var i = 0; i < lineView.rest.length; i++)
1494 if (lineView.rest[i] == line)
1495 return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i] };
1496 for (var i = 0; i < lineView.rest.length; i++)
1497 if (lineNo(lineView.rest[i]) > lineN)
1498 return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i] , before: true};
1499 }
1500
1501 // Render a line into the hidden node display.externalMeasured. Used
1502 // when measurement is needed for a line that's not in the viewport.
1503 function updateExternalMeasurement(cm, line) {
1504 line = visualLine(line);
1505 var lineN = lineNo(line);
1506 var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
1507 view.lineN = lineN;
1508 var built = view.built = buildLineContent(cm, view);
1509 view.text = built.pre;
1510 removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
1511 return view;
1512 }
1513
1514 // Get a {top, bottom, left, right} box (in line-local coordinates)
1515 // for a given character.
1516 function measureChar(cm, line, ch, bias) {
1517 return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias);
1518 }
1519
1520 // Find a line view that corresponds to the given line number.
1521 function findViewForLine(cm, lineN) {
1522 if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
1523 return cm.display.view[findViewIndex(cm, lineN)];
1524 var ext = cm.display.externalMeasured;
1525 if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
1526 return ext;
1527 }
1528
1529 // Measurement can be split in two steps, the set-up work that
1530 // applies to the whole line, and the measurement of the actual
1531 // character. Functions like coordsChar, that need to do a lot of
1532 // measurements in a row, can thus ensure that the set-up work is
1533 // only done once.
1534 function prepareMeasureForLine(cm, line) {
1535 var lineN = lineNo(line);
1536 var view = findViewForLine(cm, lineN);
1537 if (view && !view.text)
1538 view = null;
1539 else if (view && view.changes)
1540 updateLineForChanges(cm, view, lineN, getDimensions(cm));
1541 if (!view)
1542 view = updateExternalMeasurement(cm, line);
1543
1544 var info = mapFromLineView(view, line, lineN);
1545 return {
1546 line: line, view: view, rect: null,
1547 map: info.map, cache: info.cache, before: info.before,
1548 hasHeights: false
1549 };
1550 }
1551
1552 // Given a prepared measurement object, measures the position of an
1553 // actual character (or fetches it from the cache).
1554 function measureCharPrepared(cm, prepared, ch, bias) {
1555 if (prepared.before) ch = -1;
1556 var key = ch + (bias || ""), found;
1557 if (prepared.cache.hasOwnProperty(key)) {
1558 found = prepared.cache[key];
1559 } else {
1560 if (!prepared.rect)
1561 prepared.rect = prepared.view.text.getBoundingClientRect();
1562 if (!prepared.hasHeights) {
1563 ensureLineHeights(cm, prepared.view, prepared.rect);
1564 prepared.hasHeights = true;
1565 }
1566 found = measureCharInner(cm, prepared, ch, bias);
1567 if (!found.bogus) prepared.cache[key] = found;
1568 }
1569 return {left: found.left, right: found.right, top: found.top, bottom: found. bottom};
1570 }
1571
1572 var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
1573
1574 function measureCharInner(cm, prepared, ch, bias) {
1575 var map = prepared.map;
1576
1577 var node, start, end, collapse;
1578 // First, search the line map for the text node corresponding to,
1579 // or closest to, the target character.
1580 for (var i = 0; i < map.length; i += 3) {
1581 var mStart = map[i], mEnd = map[i + 1];
1582 if (ch < mStart) {
1583 start = 0; end = 1;
1584 collapse = "left";
1585 } else if (ch < mEnd) {
1586 start = ch - mStart;
1587 end = start + 1;
1588 } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
1589 end = mEnd - mStart;
1590 start = end - 1;
1591 if (ch >= mEnd) collapse = "right";
1592 }
1593 if (start != null) {
1594 node = map[i + 2];
1595 if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
1596 collapse = bias;
1597 if (bias == "left" && start == 0)
1598 while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
1599 node = map[(i -= 3) + 2];
1600 collapse = "left";
1601 }
1602 if (bias == "right" && start == mEnd - mStart)
1603 while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].i nsertLeft) {
1604 node = map[(i += 3) + 2];
1605 collapse = "right";
1606 }
1607 break;
1608 }
1609 }
1610
1611 var rect;
1612 if (node.nodeType == 3) { // If it is a text node, use a range to retrieve t he coordinates.
1613 while (start && isExtendingChar(prepared.line.text.charAt(mStart + start)) ) --start;
1614 while (mStart + end < mEnd && isExtendingChar(prepared.line.text.charAt(mS tart + end))) ++end;
1615 if (ie_upto8 && start == 0 && end == mEnd - mStart) {
1616 rect = node.parentNode.getBoundingClientRect();
1617 } else if (ie && cm.options.lineWrapping) {
1618 var rects = range(node, start, end).getClientRects();
1619 if (rects.length)
1620 rect = rects[bias == "right" ? rects.length - 1 : 0];
1621 else
1622 rect = nullRect;
1623 } else {
1624 rect = range(node, start, end).getBoundingClientRect();
1625 }
1626 } else { // If it is a widget, simply get the box for the whole widget.
1627 if (start > 0) collapse = bias = "right";
1628 var rects;
1629 if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
1630 rect = rects[bias == "right" ? rects.length - 1 : 0];
1631 else
1632 rect = node.getBoundingClientRect();
1633 }
1634 if (ie_upto8 && !start && (!rect || !rect.left && !rect.right)) {
1635 var rSpan = node.parentNode.getClientRects()[0];
1636 if (rSpan)
1637 rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top : rSpan.top, bottom: rSpan.bottom};
1638 else
1639 rect = nullRect;
1640 }
1641
1642 var top, bot = (rect.bottom + rect.top) / 2 - prepared.rect.top;
1643 var heights = prepared.view.measure.heights;
1644 for (var i = 0; i < heights.length - 1; i++)
1645 if (bot < heights[i]) break;
1646 top = i ? heights[i - 1] : 0; bot = heights[i];
1647 var result = {left: (collapse == "right" ? rect.right : rect.left) - prepare d.rect.left,
1648 right: (collapse == "left" ? rect.left : rect.right) - prepare d.rect.left,
1649 top: top, bottom: bot};
1650 if (!rect.left && !rect.right) result.bogus = true;
1651 return result;
1652 }
1653
1654 function clearLineMeasurementCacheFor(lineView) {
1655 if (lineView.measure) {
1656 lineView.measure.cache = {};
1657 lineView.measure.heights = null;
1658 if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++)
1659 lineView.measure.caches[i] = {};
1660 }
1661 }
1662
1663 function clearLineMeasurementCache(cm) {
1664 cm.display.externalMeasure = null;
1665 removeChildren(cm.display.lineMeasure);
1666 for (var i = 0; i < cm.display.view.length; i++)
1667 clearLineMeasurementCacheFor(cm.display.view[i]);
1668 }
1669
1670 function clearCaches(cm) {
1671 clearLineMeasurementCache(cm);
1672 cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cached PaddingH = null;
1673 if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
1674 cm.display.lineNumChars = null;
1675 }
1676
1677 function pageScrollX() { return window.pageXOffset || (document.documentElemen t || document.body).scrollLeft; }
1678 function pageScrollY() { return window.pageYOffset || (document.documentElemen t || document.body).scrollTop; }
1679
1680 // Converts a {top, bottom, left, right} box from line-local
1681 // coordinates into another coordinate system. Context may be one of
1682 // "line", "div" (display.lineDiv), "local"/null (editor), or "page".
1683 function intoCoordSystem(cm, lineObj, rect, context) {
1684 if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (li neObj.widgets[i].above) {
1685 var size = widgetHeight(lineObj.widgets[i]);
1686 rect.top += size; rect.bottom += size;
1687 }
1688 if (context == "line") return rect;
1689 if (!context) context = "local";
1690 var yOff = heightAtLine(lineObj);
1691 if (context == "local") yOff += paddingTop(cm.display);
1692 else yOff -= cm.display.viewOffset;
1693 if (context == "page" || context == "window") {
1694 var lOff = cm.display.lineSpace.getBoundingClientRect();
1695 yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
1696 var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
1697 rect.left += xOff; rect.right += xOff;
1698 }
1699 rect.top += yOff; rect.bottom += yOff;
1700 return rect;
1701 }
1702
1703 // Coverts a box from "div" coords to another coordinate system.
1704 // Context may be "window", "page", "div", or "local"/null.
1705 function fromCoordSystem(cm, coords, context) {
1706 if (context == "div") return coords;
1707 var left = coords.left, top = coords.top;
1708 // First move into "page" coordinate system
1709 if (context == "page") {
1710 left -= pageScrollX();
1711 top -= pageScrollY();
1712 } else if (context == "local" || !context) {
1713 var localBox = cm.display.sizer.getBoundingClientRect();
1714 left += localBox.left;
1715 top += localBox.top;
1716 }
1717
1718 var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
1719 return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
1720 }
1721
1722 function charCoords(cm, pos, context, lineObj, bias) {
1723 if (!lineObj) lineObj = getLine(cm.doc, pos.line);
1724 return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context);
1725 }
1726
1727 // Returns a box for a given cursor position, which may have an
1728 // 'other' property containing the position of the secondary cursor
1729 // on a bidi boundary.
1730 function cursorCoords(cm, pos, context, lineObj, preparedMeasure) {
1731 lineObj = lineObj || getLine(cm.doc, pos.line);
1732 if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj);
1733 function get(ch, right) {
1734 var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "le ft");
1735 if (right) m.left = m.right; else m.right = m.left;
1736 return intoCoordSystem(cm, lineObj, m, context);
1737 }
1738 function getBidi(ch, partPos) {
1739 var part = order[partPos], right = part.level % 2;
1740 if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].lev el) {
1741 part = order[--partPos];
1742 ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
1743 right = true;
1744 } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.lev el < order[partPos + 1].level) {
1745 part = order[++partPos];
1746 ch = bidiLeft(part) - part.level % 2;
1747 right = false;
1748 }
1749 if (right && ch == part.to && ch > part.from) return get(ch - 1);
1750 return get(ch, right);
1751 }
1752 var order = getOrder(lineObj), ch = pos.ch;
1753 if (!order) return get(ch);
1754 var partPos = getBidiPartAt(order, ch);
1755 var val = getBidi(ch, partPos);
1756 if (bidiOther != null) val.other = getBidi(ch, bidiOther);
1757 return val;
1758 }
1759
1760 // Used to cheaply estimate the coordinates for a position. Used for
1761 // intermediate scroll updates.
1762 function estimateCoords(cm, pos) {
1763 var left = 0, pos = clipPos(cm.doc, pos);
1764 if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch;
1765 var lineObj = getLine(cm.doc, pos.line);
1766 var top = heightAtLine(lineObj) + paddingTop(cm.display);
1767 return {left: left, right: left, top: top, bottom: top + lineObj.height};
1768 }
1769
1770 // Positions returned by coordsChar contain some extra information.
1771 // xRel is the relative x position of the input coordinates compared
1772 // to the found position (so xRel > 0 means the coordinates are to
1773 // the right of the character position, for example). When outside
1774 // is true, that means the coordinates lie outside the line's
1775 // vertical range.
1776 function PosWithInfo(line, ch, outside, xRel) {
1777 var pos = Pos(line, ch);
1778 pos.xRel = xRel;
1779 if (outside) pos.outside = true;
1780 return pos;
1781 }
1782
1783 // Compute the character position closest to the given coordinates.
1784 // Input must be lineSpace-local ("div" coordinate system).
1785 function coordsChar(cm, x, y) {
1786 var doc = cm.doc;
1787 y += cm.display.viewOffset;
1788 if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
1789 var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
1790 if (lineN > last)
1791 return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.lengt h, true, 1);
1792 if (x < 0) x = 0;
1793
1794 var lineObj = getLine(doc, lineN);
1795 for (;;) {
1796 var found = coordsCharInner(cm, lineObj, lineN, x, y);
1797 var merged = collapsedSpanAtEnd(lineObj);
1798 var mergedPos = merged && merged.find(0, true);
1799 if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from. ch && found.xRel > 0))
1800 lineN = lineNo(lineObj = mergedPos.to.line);
1801 else
1802 return found;
1803 }
1804 }
1805
1806 function coordsCharInner(cm, lineObj, lineNo, x, y) {
1807 var innerOff = y - heightAtLine(lineObj);
1808 var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
1809 var preparedMeasure = prepareMeasureForLine(cm, lineObj);
1810
1811 function getX(ch) {
1812 var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasur e);
1813 wrongLine = true;
1814 if (innerOff > sp.bottom) return sp.left - adjust;
1815 else if (innerOff < sp.top) return sp.left + adjust;
1816 else wrongLine = false;
1817 return sp.left;
1818 }
1819
1820 var bidi = getOrder(lineObj), dist = lineObj.text.length;
1821 var from = lineLeft(lineObj), to = lineRight(lineObj);
1822 var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;
1823
1824 if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
1825 // Do a binary search between these bounds.
1826 for (;;) {
1827 if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
1828 var ch = x < fromX || x - fromX <= toX - x ? from : to;
1829 var xDiff = x - (ch == from ? fromX : toX);
1830 while (isExtendingChar(lineObj.text.charAt(ch))) ++ch;
1831 var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside,
1832 xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0);
1833 return pos;
1834 }
1835 var step = Math.ceil(dist / 2), middle = from + step;
1836 if (bidi) {
1837 middle = from;
1838 for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1) ;
1839 }
1840 var middleX = getX(middle);
1841 if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) t oX += 1000; dist = step;}
1842 else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= ste p;}
1843 }
1844 }
1845
1846 var measureText;
1847 // Compute the default text height.
1848 function textHeight(display) {
1849 if (display.cachedTextHeight != null) return display.cachedTextHeight;
1850 if (measureText == null) {
1851 measureText = elt("pre");
1852 // Measure a bunch of lines, for browsers that compute
1853 // fractional heights.
1854 for (var i = 0; i < 49; ++i) {
1855 measureText.appendChild(document.createTextNode("x"));
1856 measureText.appendChild(elt("br"));
1857 }
1858 measureText.appendChild(document.createTextNode("x"));
1859 }
1860 removeChildrenAndAdd(display.measure, measureText);
1861 var height = measureText.offsetHeight / 50;
1862 if (height > 3) display.cachedTextHeight = height;
1863 removeChildren(display.measure);
1864 return height || 1;
1865 }
1866
1867 // Compute the default character width.
1868 function charWidth(display) {
1869 if (display.cachedCharWidth != null) return display.cachedCharWidth;
1870 var anchor = elt("span", "xxxxxxxxxx");
1871 var pre = elt("pre", [anchor]);
1872 removeChildrenAndAdd(display.measure, pre);
1873 var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
1874 if (width > 2) display.cachedCharWidth = width;
1875 return width || 10;
1876 }
1877
1878 // OPERATIONS
1879
1880 // Operations are used to wrap a series of changes to the editor
1881 // state in such a way that each change won't have to update the
1882 // cursor and display (which would be awkward, slow, and
1883 // error-prone). Instead, display updates are batched and then all
1884 // combined and executed at once.
1885
1886 var nextOpId = 0;
1887 // Start a new operation.
1888 function startOperation(cm) {
1889 cm.curOp = {
1890 viewChanged: false, // Flag that indicates that lines might need to b e redrawn
1891 startHeight: cm.doc.height, // Used to detect need to update scrollbar
1892 forceUpdate: false, // Used to force a redraw
1893 updateInput: null, // Whether to reset the input textarea
1894 typing: false, // Whether this reset should be careful to leave existing text (for compositing)
1895 changeObjs: null, // Accumulated changes, for firing change events
1896 cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
1897 selectionChanged: false, // Whether the selection needs to be redrawn
1898 updateMaxLine: false, // Set when the widest line needs to be determine d anew
1899 scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pu shed to DOM yet
1900 scrollToPos: null, // Used to scroll to a specific position
1901 id: ++nextOpId // Unique ID
1902 };
1903 if (!delayedCallbackDepth++) delayedCallbacks = [];
1904 }
1905
1906 // Finish an operation, updating the display and signalling delayed events
1907 function endOperation(cm) {
1908 var op = cm.curOp, doc = cm.doc, display = cm.display;
1909 cm.curOp = null;
1910
1911 if (op.updateMaxLine) findMaxLine(cm);
1912
1913 // If it looks like an update might be needed, call updateDisplay
1914 if (op.viewChanged || op.forceUpdate || op.scrollTop != null ||
1915 op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
1916 op.scrollToPos.to.line >= display.viewTo) ||
1917 display.maxLineChanged && cm.options.lineWrapping) {
1918 var updated = updateDisplay(cm, {top: op.scrollTop, ensure: op.scrollToPos }, op.forceUpdate);
1919 if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroll er.scrollTop;
1920 }
1921 // If no update was run, but the selection changed, redraw that.
1922 if (!updated && op.selectionChanged) updateSelection(cm);
1923 if (!updated && op.startHeight != cm.doc.height) updateScrollbars(cm);
1924
1925 // Propagate the scroll position to the actual DOM scroller
1926 if (op.scrollTop != null && display.scroller.scrollTop != op.scrollTop) {
1927 var top = Math.max(0, Math.min(display.scroller.scrollHeight - display.scr oller.clientHeight, op.scrollTop));
1928 display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = top;
1929 }
1930 if (op.scrollLeft != null && display.scroller.scrollLeft != op.scrollLeft) {
1931 var left = Math.max(0, Math.min(display.scroller.scrollWidth - display.scr oller.clientWidth, op.scrollLeft));
1932 display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLe ft = left;
1933 alignHorizontally(cm);
1934 }
1935 // If we need to scroll a specific position into view, do so.
1936 if (op.scrollToPos) {
1937 var coords = scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos.from),
1938 clipPos(cm.doc, op.scrollToPos.to), op.scro llToPos.margin);
1939 if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coo rds);
1940 }
1941
1942 if (op.selectionChanged) restartBlink(cm);
1943
1944 if (cm.state.focused && op.updateInput)
1945 resetInput(cm, op.typing);
1946
1947 // Fire events for markers that are hidden/unidden by editing or
1948 // undoing
1949 var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
1950 if (hidden) for (var i = 0; i < hidden.length; ++i)
1951 if (!hidden[i].lines.length) signal(hidden[i], "hide");
1952 if (unhidden) for (var i = 0; i < unhidden.length; ++i)
1953 if (unhidden[i].lines.length) signal(unhidden[i], "unhide");
1954
1955 var delayed;
1956 if (!--delayedCallbackDepth) {
1957 delayed = delayedCallbacks;
1958 delayedCallbacks = null;
1959 }
1960 // Fire change events, and delayed event handlers
1961 if (op.changeObjs)
1962 signal(cm, "changes", cm, op.changeObjs);
1963 if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i]();
1964 if (op.cursorActivityHandlers)
1965 for (var i = 0; i < op.cursorActivityHandlers.length; i++)
1966 op.cursorActivityHandlers[i](cm);
1967 }
1968
1969 // Run the given function in an operation
1970 function runInOp(cm, f) {
1971 if (cm.curOp) return f();
1972 startOperation(cm);
1973 try { return f(); }
1974 finally { endOperation(cm); }
1975 }
1976 // Wraps a function in an operation. Returns the wrapped function.
1977 function operation(cm, f) {
1978 return function() {
1979 if (cm.curOp) return f.apply(cm, arguments);
1980 startOperation(cm);
1981 try { return f.apply(cm, arguments); }
1982 finally { endOperation(cm); }
1983 };
1984 }
1985 // Used to add methods to editor and doc instances, wrapping them in
1986 // operations.
1987 function methodOp(f) {
1988 return function() {
1989 if (this.curOp) return f.apply(this, arguments);
1990 startOperation(this);
1991 try { return f.apply(this, arguments); }
1992 finally { endOperation(this); }
1993 };
1994 }
1995 function docMethodOp(f) {
1996 return function() {
1997 var cm = this.cm;
1998 if (!cm || cm.curOp) return f.apply(this, arguments);
1999 startOperation(cm);
2000 try { return f.apply(this, arguments); }
2001 finally { endOperation(cm); }
2002 };
2003 }
2004
2005 // VIEW TRACKING
2006
2007 // These objects are used to represent the visible (currently drawn)
2008 // part of the document. A LineView may correspond to multiple
2009 // logical lines, if those are connected by collapsed ranges.
2010 function LineView(doc, line, lineN) {
2011 // The starting line
2012 this.line = line;
2013 // Continuing lines, if any
2014 this.rest = visualLineContinued(line);
2015 // Number of logical lines in this visual line
2016 this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
2017 this.node = this.text = null;
2018 this.hidden = lineIsHidden(doc, line);
2019 }
2020
2021 // Create a range of LineView objects for the given lines.
2022 function buildViewArray(cm, from, to) {
2023 var array = [], nextPos;
2024 for (var pos = from; pos < to; pos = nextPos) {
2025 var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
2026 nextPos = pos + view.size;
2027 array.push(view);
2028 }
2029 return array;
2030 }
2031
2032 // Updates the display.view data structure for a given change to the
2033 // document. From and to are in pre-change coordinates. Lendiff is
2034 // the amount of lines added or subtracted by the change. This is
2035 // used for changes that span multiple lines, or change the way
2036 // lines are divided into visual lines. regLineChange (below)
2037 // registers single-line changes.
2038 function regChange(cm, from, to, lendiff) {
2039 if (from == null) from = cm.doc.first;
2040 if (to == null) to = cm.doc.first + cm.doc.size;
2041 if (!lendiff) lendiff = 0;
2042
2043 var display = cm.display;
2044 if (lendiff && to < display.viewTo &&
2045 (display.updateLineNumbers == null || display.updateLineNumbers > from))
2046 display.updateLineNumbers = from;
2047
2048 cm.curOp.viewChanged = true;
2049
2050 if (from >= display.viewTo) { // Change after
2051 if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
2052 resetView(cm);
2053 } else if (to <= display.viewFrom) { // Change before
2054 if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.v iewFrom) {
2055 resetView(cm);
2056 } else {
2057 display.viewFrom += lendiff;
2058 display.viewTo += lendiff;
2059 }
2060 } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overl ap
2061 resetView(cm);
2062 } else if (from <= display.viewFrom) { // Top overlap
2063 var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
2064 if (cut) {
2065 display.view = display.view.slice(cut.index);
2066 display.viewFrom = cut.lineN;
2067 display.viewTo += lendiff;
2068 } else {
2069 resetView(cm);
2070 }
2071 } else if (to >= display.viewTo) { // Bottom overlap
2072 var cut = viewCuttingPoint(cm, from, from, -1);
2073 if (cut) {
2074 display.view = display.view.slice(0, cut.index);
2075 display.viewTo = cut.lineN;
2076 } else {
2077 resetView(cm);
2078 }
2079 } else { // Gap in the middle
2080 var cutTop = viewCuttingPoint(cm, from, from, -1);
2081 var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
2082 if (cutTop && cutBot) {
2083 display.view = display.view.slice(0, cutTop.index)
2084 .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
2085 .concat(display.view.slice(cutBot.index));
2086 display.viewTo += lendiff;
2087 } else {
2088 resetView(cm);
2089 }
2090 }
2091
2092 var ext = display.externalMeasured;
2093 if (ext) {
2094 if (to < ext.lineN)
2095 ext.lineN += lendiff;
2096 else if (from < ext.lineN + ext.size)
2097 display.externalMeasured = null;
2098 }
2099 }
2100
2101 // Register a change to a single line. Type must be one of "text",
2102 // "gutter", "class", "widget"
2103 function regLineChange(cm, line, type) {
2104 cm.curOp.viewChanged = true;
2105 var display = cm.display, ext = cm.display.externalMeasured;
2106 if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
2107 display.externalMeasured = null;
2108
2109 if (line < display.viewFrom || line >= display.viewTo) return;
2110 var lineView = display.view[findViewIndex(cm, line)];
2111 if (lineView.node == null) return;
2112 var arr = lineView.changes || (lineView.changes = []);
2113 if (indexOf(arr, type) == -1) arr.push(type);
2114 }
2115
2116 // Clear the view.
2117 function resetView(cm) {
2118 cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
2119 cm.display.view = [];
2120 cm.display.viewOffset = 0;
2121 }
2122
2123 // Find the view element corresponding to a given line. Return null
2124 // when the line isn't visible.
2125 function findViewIndex(cm, n) {
2126 if (n >= cm.display.viewTo) return null;
2127 n -= cm.display.viewFrom;
2128 if (n < 0) return null;
2129 var view = cm.display.view;
2130 for (var i = 0; i < view.length; i++) {
2131 n -= view[i].size;
2132 if (n < 0) return i;
2133 }
2134 }
2135
2136 function viewCuttingPoint(cm, oldN, newN, dir) {
2137 var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
2138 if (!sawCollapsedSpans) return {index: index, lineN: newN};
2139 for (var i = 0, n = cm.display.viewFrom; i < index; i++)
2140 n += view[i].size;
2141 if (n != oldN) {
2142 if (dir > 0) {
2143 if (index == view.length - 1) return null;
2144 diff = (n + view[index].size) - oldN;
2145 index++;
2146 } else {
2147 diff = n - oldN;
2148 }
2149 oldN += diff; newN += diff;
2150 }
2151 while (visualLineNo(cm.doc, newN) != newN) {
2152 if (index == (dir < 0 ? 0 : view.length - 1)) return null;
2153 newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
2154 index += dir;
2155 }
2156 return {index: index, lineN: newN};
2157 }
2158
2159 // Force the view to cover a given range, adding empty view element
2160 // or clipping off existing ones as needed.
2161 function adjustView(cm, from, to) {
2162 var display = cm.display, view = display.view;
2163 if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
2164 display.view = buildViewArray(cm, from, to);
2165 display.viewFrom = from;
2166 } else {
2167 if (display.viewFrom > from)
2168 display.view = buildViewArray(cm, from, display.viewFrom).concat(display .view);
2169 else if (display.viewFrom < from)
2170 display.view = display.view.slice(findViewIndex(cm, from));
2171 display.viewFrom = from;
2172 if (display.viewTo < to)
2173 display.view = display.view.concat(buildViewArray(cm, display.viewTo, to ));
2174 else if (display.viewTo > to)
2175 display.view = display.view.slice(0, findViewIndex(cm, to));
2176 }
2177 display.viewTo = to;
2178 }
2179
2180 // Count the number of lines in the view whose DOM representation is
2181 // out of date (or nonexistent).
2182 function countDirtyView(cm) {
2183 var view = cm.display.view, dirty = 0;
2184 for (var i = 0; i < view.length; i++) {
2185 var lineView = view[i];
2186 if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty;
2187 }
2188 return dirty;
2189 }
2190
2191 // INPUT HANDLING
2192
2193 // Poll for input changes, using the normal rate of polling. This
2194 // runs as long as the editor is focused.
2195 function slowPoll(cm) {
2196 if (cm.display.pollingFast) return;
2197 cm.display.poll.set(cm.options.pollInterval, function() {
2198 readInput(cm);
2199 if (cm.state.focused) slowPoll(cm);
2200 });
2201 }
2202
2203 // When an event has just come in that is likely to add or change
2204 // something in the input textarea, we poll faster, to ensure that
2205 // the change appears on the screen quickly.
2206 function fastPoll(cm) {
2207 var missed = false;
2208 cm.display.pollingFast = true;
2209 function p() {
2210 var changed = readInput(cm);
2211 if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);}
2212 else {cm.display.pollingFast = false; slowPoll(cm);}
2213 }
2214 cm.display.poll.set(20, p);
2215 }
2216
2217 // Read input from the textarea, and update the document to match.
2218 // When something is selected, it is present in the textarea, and
2219 // selected (unless it is huge, in which case a placeholder is
2220 // used). When nothing is selected, the cursor sits after previously
2221 // seen text (can be empty), which is stored in prevInput (we must
2222 // not reset the textarea when typing, because that breaks IME).
2223 function readInput(cm) {
2224 var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc ;
2225 // Since this is called a *lot*, try to bail out as cheaply as
2226 // possible when it is clear that nothing happened. hasSelection
2227 // will be the case when there is a lot of text in the textarea,
2228 // in which case reading its value would be expensive.
2229 if (!cm.state.focused || (hasSelection(input) && !prevInput) || isReadOnly(c m) || cm.options.disableInput)
2230 return false;
2231 // See paste handler for more on the fakedLastChar kludge
2232 if (cm.state.pasteIncoming && cm.state.fakedLastChar) {
2233 input.value = input.value.substring(0, input.value.length - 1);
2234 cm.state.fakedLastChar = false;
2235 }
2236 var text = input.value;
2237 // If nothing changed, bail.
2238 if (text == prevInput && !cm.somethingSelected()) return false;
2239 // Work around nonsensical selection resetting in IE9/10
2240 if (ie && !ie_upto8 && cm.display.inputHasSelection === text) {
2241 resetInput(cm);
2242 return false;
2243 }
2244
2245 var withOp = !cm.curOp;
2246 if (withOp) startOperation(cm);
2247 cm.display.shift = false;
2248
2249 // Find the part of the input that is actually new
2250 var same = 0, l = Math.min(prevInput.length, text.length);
2251 while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++sa me;
2252 var inserted = text.slice(same), textLines = splitLines(inserted);
2253
2254 // When pasing N lines into N selections, insert one line per selection
2255 var multiPaste = cm.state.pasteIncoming && textLines.length > 1 && doc.sel.r anges.length == textLines.length;
2256
2257 // Normal behavior is to insert the new text into every selection
2258 for (var i = doc.sel.ranges.length - 1; i >= 0; i--) {
2259 var range = doc.sel.ranges[i];
2260 var from = range.from(), to = range.to();
2261 // Handle deletion
2262 if (same < prevInput.length)
2263 from = Pos(from.line, from.ch - (prevInput.length - same));
2264 // Handle overwrite
2265 else if (cm.state.overwrite && range.empty() && !cm.state.pasteIncoming)
2266 to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + ls t(textLines).length));
2267 var updateInput = cm.curOp.updateInput;
2268 var changeEvent = {from: from, to: to, text: multiPaste ? [textLines[i]] : textLines,
2269 origin: cm.state.pasteIncoming ? "paste" : cm.state.cut Incoming ? "cut" : "+input"};
2270 makeChange(cm.doc, changeEvent);
2271 signalLater(cm, "inputRead", cm, changeEvent);
2272 // When an 'electric' character is inserted, immediately trigger a reinden t
2273 if (inserted && !cm.state.pasteIncoming && cm.options.electricChars &&
2274 cm.options.smartIndent && range.head.ch < 100 &&
2275 (!i || doc.sel.ranges[i - 1].head.line != range.head.line)) {
2276 var mode = cm.getModeAt(range.head);
2277 if (mode.electricChars) {
2278 for (var j = 0; j < mode.electricChars.length; j++)
2279 if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
2280 indentLine(cm, range.head.line, "smart");
2281 break;
2282 }
2283 } else if (mode.electricInput) {
2284 var end = changeEnd(changeEvent);
2285 if (mode.electricInput.test(getLine(doc, end.line).text.slice(0, end.c h)))
2286 indentLine(cm, range.head.line, "smart");
2287 }
2288 }
2289 }
2290 ensureCursorVisible(cm);
2291 cm.curOp.updateInput = updateInput;
2292 cm.curOp.typing = true;
2293
2294 // Don't leave long text in the textarea, since it makes further polling slo w
2295 if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display. prevInput = "";
2296 else cm.display.prevInput = text;
2297 if (withOp) endOperation(cm);
2298 cm.state.pasteIncoming = cm.state.cutIncoming = false;
2299 return true;
2300 }
2301
2302 // Reset the input to correspond to the selection (or to be empty,
2303 // when not typing and nothing is selected)
2304 function resetInput(cm, typing) {
2305 var minimal, selected, doc = cm.doc;
2306 if (cm.somethingSelected()) {
2307 cm.display.prevInput = "";
2308 var range = doc.sel.primary();
2309 minimal = hasCopyEvent &&
2310 (range.to().line - range.from().line > 100 || (selected = cm.getSelectio n()).length > 1000);
2311 var content = minimal ? "-" : selected || cm.getSelection();
2312 cm.display.input.value = content;
2313 if (cm.state.focused) selectInput(cm.display.input);
2314 if (ie && !ie_upto8) cm.display.inputHasSelection = content;
2315 } else if (!typing) {
2316 cm.display.prevInput = cm.display.input.value = "";
2317 if (ie && !ie_upto8) cm.display.inputHasSelection = null;
2318 }
2319 cm.display.inaccurateSelection = minimal;
2320 }
2321
2322 function focusInput(cm) {
2323 if (cm.options.readOnly != "nocursor" && (!mobile || activeElt() != cm.displ ay.input))
2324 cm.display.input.focus();
2325 }
2326
2327 function ensureFocus(cm) {
2328 if (!cm.state.focused) { focusInput(cm); onFocus(cm); }
2329 }
2330
2331 function isReadOnly(cm) {
2332 return cm.options.readOnly || cm.doc.cantEdit;
2333 }
2334
2335 // EVENT HANDLERS
2336
2337 // Attach the necessary event handlers when initializing the editor
2338 function registerEventHandlers(cm) {
2339 var d = cm.display;
2340 on(d.scroller, "mousedown", operation(cm, onMouseDown));
2341 // Older IE's will not fire a second mousedown for a double click
2342 if (ie_upto10)
2343 on(d.scroller, "dblclick", operation(cm, function(e) {
2344 if (signalDOMEvent(cm, e)) return;
2345 var pos = posFromMouse(cm, e);
2346 if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return ;
2347 e_preventDefault(e);
2348 var word = findWordAt(cm.doc, pos);
2349 extendSelection(cm.doc, word.anchor, word.head);
2350 }));
2351 else
2352 on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preven tDefault(e); });
2353 // Prevent normal selection in the editor (we handle our own)
2354 on(d.lineSpace, "selectstart", function(e) {
2355 if (!eventInWidget(d, e)) e_preventDefault(e);
2356 });
2357 // Some browsers fire contextmenu *after* opening the menu, at
2358 // which point we can't mess with it anymore. Context menu is
2359 // handled in onMouseDown for these browsers.
2360 if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContext Menu(cm, e);});
2361
2362 // Sync scrolling between fake scrollbars and real scrollable
2363 // area, ensure viewport is updated when scrolling.
2364 on(d.scroller, "scroll", function() {
2365 if (d.scroller.clientHeight) {
2366 setScrollTop(cm, d.scroller.scrollTop);
2367 setScrollLeft(cm, d.scroller.scrollLeft, true);
2368 signal(cm, "scroll", cm);
2369 }
2370 });
2371 on(d.scrollbarV, "scroll", function() {
2372 if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop);
2373 });
2374 on(d.scrollbarH, "scroll", function() {
2375 if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft);
2376 });
2377
2378 // Listen to wheel events in order to try and update the viewport on time.
2379 on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
2380 on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
2381
2382 // Prevent clicks in the scrollbars from killing focus
2383 function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); }
2384 on(d.scrollbarH, "mousedown", reFocus);
2385 on(d.scrollbarV, "mousedown", reFocus);
2386 // Prevent wrapper from ever scrolling
2387 on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollL eft = 0; });
2388
2389 // When the window resizes, we need to refresh active editors.
2390 var resizeTimer;
2391 function onResize() {
2392 if (resizeTimer == null) resizeTimer = setTimeout(function() {
2393 resizeTimer = null;
2394 // Might be a text scaling operation, clear size caches.
2395 d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = knownScrollb arWidth = null;
2396 cm.setSize();
2397 }, 100);
2398 }
2399 on(window, "resize", onResize);
2400 // The above handler holds on to the editor and its data
2401 // structures. Here we poll to unregister it when the editor is no
2402 // longer in the document, so that it can be garbage-collected.
2403 function unregister() {
2404 if (contains(document.body, d.wrapper)) setTimeout(unregister, 5000);
2405 else off(window, "resize", onResize);
2406 }
2407 setTimeout(unregister, 5000);
2408
2409 on(d.input, "keyup", operation(cm, onKeyUp));
2410 on(d.input, "input", function() {
2411 if (ie && !ie_upto8 && cm.display.inputHasSelection) cm.display.inputHasSe lection = null;
2412 fastPoll(cm);
2413 });
2414 on(d.input, "keydown", operation(cm, onKeyDown));
2415 on(d.input, "keypress", operation(cm, onKeyPress));
2416 on(d.input, "focus", bind(onFocus, cm));
2417 on(d.input, "blur", bind(onBlur, cm));
2418
2419 function drag_(e) {
2420 if (!signalDOMEvent(cm, e)) e_stop(e);
2421 }
2422 if (cm.options.dragDrop) {
2423 on(d.scroller, "dragstart", function(e){onDragStart(cm, e);});
2424 on(d.scroller, "dragenter", drag_);
2425 on(d.scroller, "dragover", drag_);
2426 on(d.scroller, "drop", operation(cm, onDrop));
2427 }
2428 on(d.scroller, "paste", function(e) {
2429 if (eventInWidget(d, e)) return;
2430 cm.state.pasteIncoming = true;
2431 focusInput(cm);
2432 fastPoll(cm);
2433 });
2434 on(d.input, "paste", function() {
2435 // Workaround for webkit bug https://bugs.webkit.org/show_bug.cgi?id=90206
2436 // Add a char to the end of textarea before paste occur so that
2437 // selection doesn't span to the end of textarea.
2438 if (webkit && !cm.state.fakedLastChar && !(new Date - cm.state.lastMiddleD own < 200)) {
2439 var start = d.input.selectionStart, end = d.input.selectionEnd;
2440 d.input.value += "$";
2441 d.input.selectionStart = start;
2442 d.input.selectionEnd = end;
2443 cm.state.fakedLastChar = true;
2444 }
2445 cm.state.pasteIncoming = true;
2446 fastPoll(cm);
2447 });
2448
2449 function prepareCopyCut(e) {
2450 if (cm.somethingSelected()) {
2451 if (d.inaccurateSelection) {
2452 d.prevInput = "";
2453 d.inaccurateSelection = false;
2454 d.input.value = cm.getSelection();
2455 selectInput(d.input);
2456 }
2457 } else {
2458 var text = "", ranges = [];
2459 for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
2460 var line = cm.doc.sel.ranges[i].head.line;
2461 var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
2462 ranges.push(lineRange);
2463 text += cm.getRange(lineRange.anchor, lineRange.head);
2464 }
2465 if (e.type == "cut") {
2466 cm.setSelections(ranges, null, sel_dontScroll);
2467 } else {
2468 d.prevInput = "";
2469 d.input.value = text;
2470 selectInput(d.input);
2471 }
2472 }
2473 if (e.type == "cut") cm.state.cutIncoming = true;
2474 }
2475 on(d.input, "cut", prepareCopyCut);
2476 on(d.input, "copy", prepareCopyCut);
2477
2478 // Needed to handle Tab key in KHTML
2479 if (khtml) on(d.sizer, "mouseup", function() {
2480 if (activeElt() == d.input) d.input.blur();
2481 focusInput(cm);
2482 });
2483 }
2484
2485 // MOUSE EVENTS
2486
2487 // Return true when the given mouse event happened in a widget
2488 function eventInWidget(display, e) {
2489 for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
2490 if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display. mover) return true;
2491 }
2492 }
2493
2494 // Given a mouse event, find the corresponding position. If liberal
2495 // is false, it checks whether a gutter or scrollbar was clicked,
2496 // and returns null if it was. forRect is used by rectangular
2497 // selections, and tries to estimate a character position even for
2498 // coordinates beyond the right of the text.
2499 function posFromMouse(cm, e, liberal, forRect) {
2500 var display = cm.display;
2501 if (!liberal) {
2502 var target = e_target(e);
2503 if (target == display.scrollbarH || target == display.scrollbarV ||
2504 target == display.scrollbarFiller || target == display.gutterFiller) r eturn null;
2505 }
2506 var x, y, space = display.lineSpace.getBoundingClientRect();
2507 // Fails unpredictably on IE[67] when mouse is dragged around quickly.
2508 try { x = e.clientX - space.left; y = e.clientY - space.top; }
2509 catch (e) { return null; }
2510 var coords = coordsChar(cm, x, y), line;
2511 if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text ).length == coords.ch) {
2512 var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.le ngth;
2513 coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display) .left) / charWidth(cm.display)) - colDiff));
2514 }
2515 return coords;
2516 }
2517
2518 // A mouse down can be a single click, double click, triple click,
2519 // start of selection drag, start of text drag, new cursor
2520 // (ctrl-click), rectangle drag (alt-drag), or xwin
2521 // middle-click-paste. Or it might be a click on something we should
2522 // not interfere with, such as a scrollbar or widget.
2523 function onMouseDown(e) {
2524 if (signalDOMEvent(this, e)) return;
2525 var cm = this, display = cm.display;
2526 display.shift = e.shiftKey;
2527
2528 if (eventInWidget(display, e)) {
2529 if (!webkit) {
2530 // Briefly turn off draggability, to allow widgets to do
2531 // normal dragging things.
2532 display.scroller.draggable = false;
2533 setTimeout(function(){display.scroller.draggable = true;}, 100);
2534 }
2535 return;
2536 }
2537 if (clickInGutter(cm, e)) return;
2538 var start = posFromMouse(cm, e);
2539 window.focus();
2540
2541 switch (e_button(e)) {
2542 case 1:
2543 if (start)
2544 leftButtonDown(cm, e, start);
2545 else if (e_target(e) == display.scroller)
2546 e_preventDefault(e);
2547 break;
2548 case 2:
2549 if (webkit) cm.state.lastMiddleDown = +new Date;
2550 if (start) extendSelection(cm.doc, start);
2551 setTimeout(bind(focusInput, cm), 20);
2552 e_preventDefault(e);
2553 break;
2554 case 3:
2555 if (captureRightClick) onContextMenu(cm, e);
2556 break;
2557 }
2558 }
2559
2560 var lastClick, lastDoubleClick;
2561 function leftButtonDown(cm, e, start) {
2562 setTimeout(bind(ensureFocus, cm), 0);
2563
2564 var now = +new Date, type;
2565 if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleCli ck.pos, start) == 0) {
2566 type = "triple";
2567 } else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, sta rt) == 0) {
2568 type = "double";
2569 lastDoubleClick = {time: now, pos: start};
2570 } else {
2571 type = "single";
2572 lastClick = {time: now, pos: start};
2573 }
2574
2575 var sel = cm.doc.sel, addNew = mac ? e.metaKey : e.ctrlKey;
2576 if (cm.options.dragDrop && dragAndDrop && !addNew && !isReadOnly(cm) &&
2577 type == "single" && sel.contains(start) > -1 && sel.somethingSelected())
2578 leftButtonStartDrag(cm, e, start);
2579 else
2580 leftButtonSelect(cm, e, start, type, addNew);
2581 }
2582
2583 // Start a text drag. When it ends, see if any dragging actually
2584 // happen, and treat as a click if it didn't.
2585 function leftButtonStartDrag(cm, e, start) {
2586 var display = cm.display;
2587 var dragEnd = operation(cm, function(e2) {
2588 if (webkit) display.scroller.draggable = false;
2589 cm.state.draggingText = false;
2590 off(document, "mouseup", dragEnd);
2591 off(display.scroller, "drop", dragEnd);
2592 if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
2593 e_preventDefault(e2);
2594 extendSelection(cm.doc, start);
2595 focusInput(cm);
2596 // Work around unexplainable focus problem in IE9 (#2127)
2597 if (ie_upto10 && !ie_upto8)
2598 setTimeout(function() {document.body.focus(); focusInput(cm);}, 20);
2599 }
2600 });
2601 // Let the drag handler handle this.
2602 if (webkit) display.scroller.draggable = true;
2603 cm.state.draggingText = dragEnd;
2604 // IE's approach to draggable
2605 if (display.scroller.dragDrop) display.scroller.dragDrop();
2606 on(document, "mouseup", dragEnd);
2607 on(display.scroller, "drop", dragEnd);
2608 }
2609
2610 // Normal selection, as opposed to text dragging.
2611 function leftButtonSelect(cm, e, start, type, addNew) {
2612 var display = cm.display, doc = cm.doc;
2613 e_preventDefault(e);
2614
2615 var ourRange, ourIndex, startSel = doc.sel;
2616 if (addNew && !e.shiftKey) {
2617 ourIndex = doc.sel.contains(start);
2618 if (ourIndex > -1)
2619 ourRange = doc.sel.ranges[ourIndex];
2620 else
2621 ourRange = new Range(start, start);
2622 } else {
2623 ourRange = doc.sel.primary();
2624 }
2625
2626 if (e.altKey) {
2627 type = "rect";
2628 if (!addNew) ourRange = new Range(start, start);
2629 start = posFromMouse(cm, e, true, true);
2630 ourIndex = -1;
2631 } else if (type == "double") {
2632 var word = findWordAt(doc, start);
2633 if (cm.display.shift || doc.extend)
2634 ourRange = extendRange(doc, ourRange, word.anchor, word.head);
2635 else
2636 ourRange = word;
2637 } else if (type == "triple") {
2638 var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0)));
2639 if (cm.display.shift || doc.extend)
2640 ourRange = extendRange(doc, ourRange, line.anchor, line.head);
2641 else
2642 ourRange = line;
2643 } else {
2644 ourRange = extendRange(doc, ourRange, start);
2645 }
2646
2647 if (!addNew) {
2648 ourIndex = 0;
2649 setSelection(doc, new Selection([ourRange], 0), sel_mouse);
2650 startSel = doc.sel;
2651 } else if (ourIndex > -1) {
2652 replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
2653 } else {
2654 ourIndex = doc.sel.ranges.length;
2655 setSelection(doc, normalizeSelection(doc.sel.ranges.concat([ourRange]), ou rIndex),
2656 {scroll: false, origin: "*mouse"});
2657 }
2658
2659 var lastPos = start;
2660 function extendTo(pos) {
2661 if (cmp(lastPos, pos) == 0) return;
2662 lastPos = pos;
2663
2664 if (type == "rect") {
2665 var ranges = [], tabSize = cm.options.tabSize;
2666 var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabS ize);
2667 var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
2668 var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol );
2669 for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLi ne(), Math.max(start.line, pos.line));
2670 line <= end; line++) {
2671 var text = getLine(doc, line).text, leftPos = findColumn(text, left, t abSize);
2672 if (left == right)
2673 ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos)));
2674 else if (text.length > leftPos)
2675 ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize))));
2676 }
2677 if (!ranges.length) ranges.push(new Range(start, start));
2678 setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex). concat(ranges), ourIndex), sel_mouse);
2679 } else {
2680 var oldRange = ourRange;
2681 var anchor = oldRange.anchor, head = pos;
2682 if (type != "single") {
2683 if (type == "double")
2684 var range = findWordAt(doc, pos);
2685 else
2686 var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0)));
2687 if (cmp(range.anchor, anchor) > 0) {
2688 head = range.head;
2689 anchor = minPos(oldRange.from(), range.anchor);
2690 } else {
2691 head = range.anchor;
2692 anchor = maxPos(oldRange.to(), range.head);
2693 }
2694 }
2695 var ranges = startSel.ranges.slice(0);
2696 ranges[ourIndex] = new Range(clipPos(doc, anchor), head);
2697 setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse);
2698 }
2699 }
2700
2701 var editorSize = display.wrapper.getBoundingClientRect();
2702 // Used to ensure timeout re-tries don't fire when another extend
2703 // happened in the meantime (clearTimeout isn't reliable -- at
2704 // least on Chrome, the timeouts still happen even when cleared,
2705 // if the clear happens after their scheduled firing time).
2706 var counter = 0;
2707
2708 function extend(e) {
2709 var curCount = ++counter;
2710 var cur = posFromMouse(cm, e, true, type == "rect");
2711 if (!cur) return;
2712 if (cmp(cur, lastPos) != 0) {
2713 ensureFocus(cm);
2714 extendTo(cur);
2715 var visible = visibleLines(display, doc);
2716 if (cur.line >= visible.to || cur.line < visible.from)
2717 setTimeout(operation(cm, function(){if (counter == curCount) extend(e) ;}), 150);
2718 } else {
2719 var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize. bottom ? 20 : 0;
2720 if (outside) setTimeout(operation(cm, function() {
2721 if (counter != curCount) return;
2722 display.scroller.scrollTop += outside;
2723 extend(e);
2724 }), 50);
2725 }
2726 }
2727
2728 function done(e) {
2729 counter = Infinity;
2730 e_preventDefault(e);
2731 focusInput(cm);
2732 off(document, "mousemove", move);
2733 off(document, "mouseup", up);
2734 doc.history.lastSelOrigin = null;
2735 }
2736
2737 var move = operation(cm, function(e) {
2738 if ((ie && !ie_upto9) ? !e.buttons : !e_button(e)) done(e);
2739 else extend(e);
2740 });
2741 var up = operation(cm, done);
2742 on(document, "mousemove", move);
2743 on(document, "mouseup", up);
2744 }
2745
2746 // Determines whether an event happened in the gutter, and fires the
2747 // handlers for the corresponding event.
2748 function gutterEvent(cm, e, type, prevent, signalfn) {
2749 try { var mX = e.clientX, mY = e.clientY; }
2750 catch(e) { return false; }
2751 if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) retu rn false;
2752 if (prevent) e_preventDefault(e);
2753
2754 var display = cm.display;
2755 var lineBox = display.lineDiv.getBoundingClientRect();
2756
2757 if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented( e);
2758 mY -= lineBox.top - display.viewOffset;
2759
2760 for (var i = 0; i < cm.options.gutters.length; ++i) {
2761 var g = display.gutters.childNodes[i];
2762 if (g && g.getBoundingClientRect().right >= mX) {
2763 var line = lineAtHeight(cm.doc, mY);
2764 var gutter = cm.options.gutters[i];
2765 signalfn(cm, type, cm, line, gutter, e);
2766 return e_defaultPrevented(e);
2767 }
2768 }
2769 }
2770
2771 function clickInGutter(cm, e) {
2772 return gutterEvent(cm, e, "gutterClick", true, signalLater);
2773 }
2774
2775 // Kludge to work around strange IE behavior where it'll sometimes
2776 // re-fire a series of drag-related events right after the drop (#1551)
2777 var lastDrop = 0;
2778
2779 function onDrop(e) {
2780 var cm = this;
2781 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
2782 return;
2783 e_preventDefault(e);
2784 if (ie) lastDrop = +new Date;
2785 var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
2786 if (!pos || isReadOnly(cm)) return;
2787 // Might be a file drop, in which case we simply extract the text
2788 // and insert it.
2789 if (files && files.length && window.FileReader && window.File) {
2790 var n = files.length, text = Array(n), read = 0;
2791 var loadFile = function(file, i) {
2792 var reader = new FileReader;
2793 reader.onload = operation(cm, function() {
2794 text[i] = reader.result;
2795 if (++read == n) {
2796 pos = clipPos(cm.doc, pos);
2797 var change = {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"};
2798 makeChange(cm.doc, change);
2799 setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(ch ange)));
2800 }
2801 });
2802 reader.readAsText(file);
2803 };
2804 for (var i = 0; i < n; ++i) loadFile(files[i], i);
2805 } else { // Normal drop
2806 // Don't do a replace if the drop happened inside of the selected text.
2807 if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
2808 cm.state.draggingText(e);
2809 // Ensure the editor is re-focused
2810 setTimeout(bind(focusInput, cm), 20);
2811 return;
2812 }
2813 try {
2814 var text = e.dataTransfer.getData("Text");
2815 if (text) {
2816 var selected = cm.state.draggingText && cm.listSelections();
2817 setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
2818 if (selected) for (var i = 0; i < selected.length; ++i)
2819 replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag ");
2820 cm.replaceSelection(text, "around", "paste");
2821 focusInput(cm);
2822 }
2823 }
2824 catch(e){}
2825 }
2826 }
2827
2828 function onDragStart(cm, e) {
2829 if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e ); return; }
2830 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
2831
2832 e.dataTransfer.setData("Text", cm.getSelection());
2833
2834 // Use dummy image instead of default browsers image.
2835 // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
2836 if (e.dataTransfer.setDragImage && !safari) {
2837 var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
2838 img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAA AICTAEAOw==";
2839 if (presto) {
2840 img.width = img.height = 1;
2841 cm.display.wrapper.appendChild(img);
2842 // Force a relayout, or Opera won't use our image for some obscure reaso n
2843 img._top = img.offsetTop;
2844 }
2845 e.dataTransfer.setDragImage(img, 0, 0);
2846 if (presto) img.parentNode.removeChild(img);
2847 }
2848 }
2849
2850 // SCROLL EVENTS
2851
2852 // Sync the scrollable area and scrollbars, ensure the viewport
2853 // covers the visible area.
2854 function setScrollTop(cm, val) {
2855 if (Math.abs(cm.doc.scrollTop - val) < 2) return;
2856 cm.doc.scrollTop = val;
2857 if (!gecko) updateDisplay(cm, {top: val});
2858 if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = va l;
2859 if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val;
2860 if (gecko) updateDisplay(cm);
2861 startWorker(cm, 100);
2862 }
2863 // Sync scroller and scrollbar, ensure the gutter elements are
2864 // aligned.
2865 function setScrollLeft(cm, val, isScroller) {
2866 if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val ) < 2) return;
2867 val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.cl ientWidth);
2868 cm.doc.scrollLeft = val;
2869 alignHorizontally(cm);
2870 if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
2871 if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLef t = val;
2872 }
2873
2874 // Since the delta values reported on mouse wheel events are
2875 // unstandardized between browsers and even browser versions, and
2876 // generally horribly unpredictable, this code starts by measuring
2877 // the scroll effect that the first few mouse wheel events have,
2878 // and, from that, detects the way it can convert deltas to pixel
2879 // offsets afterwards.
2880 //
2881 // The reason we want to know the amount a wheel event will scroll
2882 // is that it gives us a chance to update the display before the
2883 // actual scrolling happens, reducing flickering.
2884
2885 var wheelSamples = 0, wheelPixelsPerUnit = null;
2886 // Fill in a browser-detected starting value on browsers where we
2887 // know one. These don't have to be accurate -- the result of them
2888 // being wrong would just be a slight flicker on the first wheel
2889 // scroll (if it is large enough).
2890 if (ie) wheelPixelsPerUnit = -.53;
2891 else if (gecko) wheelPixelsPerUnit = 15;
2892 else if (chrome) wheelPixelsPerUnit = -.7;
2893 else if (safari) wheelPixelsPerUnit = -1/3;
2894
2895 function onScrollWheel(cm, e) {
2896 var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
2897 if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
2898 if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
2899 else if (dy == null) dy = e.wheelDelta;
2900
2901 var display = cm.display, scroll = display.scroller;
2902 // Quit if there's nothing to scroll here
2903 if (!(dx && scroll.scrollWidth > scroll.clientWidth ||
2904 dy && scroll.scrollHeight > scroll.clientHeight)) return;
2905
2906 // Webkit browsers on OS X abort momentum scrolls when the target
2907 // of the scroll event is removed from the scrollable element.
2908 // This hack (see related code in patchDisplay) makes sure the
2909 // element is kept around.
2910 if (dy && mac && webkit) {
2911 outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
2912 for (var i = 0; i < view.length; i++) {
2913 if (view[i].node == cur) {
2914 cm.display.currentWheelTarget = cur;
2915 break outer;
2916 }
2917 }
2918 }
2919 }
2920
2921 // On some browsers, horizontal scrolling will cause redraws to
2922 // happen before the gutter has been realigned, causing it to
2923 // wriggle around in a most unseemly way. When we have an
2924 // estimated pixels/delta value, we just handle horizontal
2925 // scrolling entirely here. It'll be slightly off from native, but
2926 // better than glitching out.
2927 if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
2928 if (dy)
2929 setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixel sPerUnit, scroll.scrollHeight - scroll.clientHeight)));
2930 setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixel sPerUnit, scroll.scrollWidth - scroll.clientWidth)));
2931 e_preventDefault(e);
2932 display.wheelStartX = null; // Abort measurement, if in progress
2933 return;
2934 }
2935
2936 // 'Project' the visible viewport to cover the area that is being
2937 // scrolled into view (if we know enough to estimate it).
2938 if (dy && wheelPixelsPerUnit != null) {
2939 var pixels = dy * wheelPixelsPerUnit;
2940 var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
2941 if (pixels < 0) top = Math.max(0, top + pixels - 50);
2942 else bot = Math.min(cm.doc.height, bot + pixels + 50);
2943 updateDisplay(cm, {top: top, bottom: bot});
2944 }
2945
2946 if (wheelSamples < 20) {
2947 if (display.wheelStartX == null) {
2948 display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.sc rollTop;
2949 display.wheelDX = dx; display.wheelDY = dy;
2950 setTimeout(function() {
2951 if (display.wheelStartX == null) return;
2952 var movedX = scroll.scrollLeft - display.wheelStartX;
2953 var movedY = scroll.scrollTop - display.wheelStartY;
2954 var sample = (movedY && display.wheelDY && movedY / display.wheelDY) | |
2955 (movedX && display.wheelDX && movedX / display.wheelDX);
2956 display.wheelStartX = display.wheelStartY = null;
2957 if (!sample) return;
2958 wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (w heelSamples + 1);
2959 ++wheelSamples;
2960 }, 200);
2961 } else {
2962 display.wheelDX += dx; display.wheelDY += dy;
2963 }
2964 }
2965 }
2966
2967 // KEY EVENTS
2968
2969 // Run a handler that was bound to a key.
2970 function doHandleBinding(cm, bound, dropShift) {
2971 if (typeof bound == "string") {
2972 bound = commands[bound];
2973 if (!bound) return false;
2974 }
2975 // Ensure previous input has been read, so that the handler sees a
2976 // consistent view of the document
2977 if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false;
2978 var prevShift = cm.display.shift, done = false;
2979 try {
2980 if (isReadOnly(cm)) cm.state.suppressEdits = true;
2981 if (dropShift) cm.display.shift = false;
2982 done = bound(cm) != Pass;
2983 } finally {
2984 cm.display.shift = prevShift;
2985 cm.state.suppressEdits = false;
2986 }
2987 return done;
2988 }
2989
2990 // Collect the currently active keymaps.
2991 function allKeyMaps(cm) {
2992 var maps = cm.state.keyMaps.slice(0);
2993 if (cm.options.extraKeys) maps.push(cm.options.extraKeys);
2994 maps.push(cm.options.keyMap);
2995 return maps;
2996 }
2997
2998 var maybeTransition;
2999 // Handle a key from the keydown event.
3000 function handleKeyBinding(cm, e) {
3001 // Handle automatic keymap transitions
3002 var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto;
3003 clearTimeout(maybeTransition);
3004 if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
3005 if (getKeyMap(cm.options.keyMap) == startMap) {
3006 cm.options.keyMap = (next.call ? next.call(null, cm) : next);
3007 keyMapChanged(cm);
3008 }
3009 }, 50);
3010
3011 var name = keyName(e, true), handled = false;
3012 if (!name) return false;
3013 var keymaps = allKeyMaps(cm);
3014
3015 if (e.shiftKey) {
3016 // First try to resolve full name (including 'Shift-'). Failing
3017 // that, see if there is a cursor-motion command (starting with
3018 // 'go') bound to the keyname without 'Shift-'.
3019 handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandle Binding(cm, b, true);})
3020 || lookupKey(name, keymaps, function(b) {
3021 if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
3022 return doHandleBinding(cm, b);
3023 });
3024 } else {
3025 handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm , b); });
3026 }
3027
3028 if (handled) {
3029 e_preventDefault(e);
3030 restartBlink(cm);
3031 signalLater(cm, "keyHandled", cm, name, e);
3032 }
3033 return handled;
3034 }
3035
3036 // Handle a key from the keypress event
3037 function handleCharBinding(cm, e, ch) {
3038 var handled = lookupKey("'" + ch + "'", allKeyMaps(cm),
3039 function(b) { return doHandleBinding(cm, b, true); } );
3040 if (handled) {
3041 e_preventDefault(e);
3042 restartBlink(cm);
3043 signalLater(cm, "keyHandled", cm, "'" + ch + "'", e);
3044 }
3045 return handled;
3046 }
3047
3048 var lastStoppedKey = null;
3049 function onKeyDown(e) {
3050 var cm = this;
3051 ensureFocus(cm);
3052 if (signalDOMEvent(cm, e)) return;
3053 // IE does strange things with escape.
3054 if (ie_upto10 && e.keyCode == 27) e.returnValue = false;
3055 var code = e.keyCode;
3056 cm.display.shift = code == 16 || e.shiftKey;
3057 var handled = handleKeyBinding(cm, e);
3058 if (presto) {
3059 lastStoppedKey = handled ? code : null;
3060 // Opera has no cut event... we try to at least catch the key combo
3061 if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKe y))
3062 cm.replaceSelection("", null, "cut");
3063 }
3064
3065 // Turn mouse into crosshair when Alt is held on Mac.
3066 if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.classN ame))
3067 showCrossHair(cm);
3068 }
3069
3070 function showCrossHair(cm) {
3071 var lineDiv = cm.display.lineDiv;
3072 addClass(lineDiv, "CodeMirror-crosshair");
3073
3074 function up(e) {
3075 if (e.keyCode == 18 || !e.altKey) {
3076 rmClass(lineDiv, "CodeMirror-crosshair");
3077 off(document, "keyup", up);
3078 off(document, "mouseover", up);
3079 }
3080 }
3081 on(document, "keyup", up);
3082 on(document, "mouseover", up);
3083 }
3084
3085 function onKeyUp(e) {
3086 if (signalDOMEvent(this, e)) return;
3087 if (e.keyCode == 16) this.doc.sel.shift = false;
3088 }
3089
3090 function onKeyPress(e) {
3091 var cm = this;
3092 if (signalDOMEvent(cm, e)) return;
3093 var keyCode = e.keyCode, charCode = e.charCode;
3094 if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDe fault(e); return;}
3095 if (((presto && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm , e)) return;
3096 var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
3097 if (handleCharBinding(cm, e, ch)) return;
3098 if (ie && !ie_upto8) cm.display.inputHasSelection = null;
3099 fastPoll(cm);
3100 }
3101
3102 // FOCUS/BLUR EVENTS
3103
3104 function onFocus(cm) {
3105 if (cm.options.readOnly == "nocursor") return;
3106 if (!cm.state.focused) {
3107 signal(cm, "focus", cm);
3108 cm.state.focused = true;
3109 addClass(cm.display.wrapper, "CodeMirror-focused");
3110 // The prevInput test prevents this from firing when a context
3111 // menu is closed (since the resetInput would kill the
3112 // select-all detection hack)
3113 if (!cm.curOp && cm.display.selForContextMenu == cm.doc.sel) {
3114 resetInput(cm);
3115 if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730
3116 }
3117 }
3118 slowPoll(cm);
3119 restartBlink(cm);
3120 }
3121 function onBlur(cm) {
3122 if (cm.state.focused) {
3123 signal(cm, "blur", cm);
3124 cm.state.focused = false;
3125 rmClass(cm.display.wrapper, "CodeMirror-focused");
3126 }
3127 clearInterval(cm.display.blinker);
3128 setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 15 0);
3129 }
3130
3131 // CONTEXT MENU HANDLING
3132
3133 var detectingSelectAll;
3134 // To make the context menu work, we need to briefly unhide the
3135 // textarea (making it as unobtrusive as possible) to let the
3136 // right-click take effect on it.
3137 function onContextMenu(cm, e) {
3138 if (signalDOMEvent(cm, e, "contextmenu")) return;
3139 var display = cm.display;
3140 if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return;
3141
3142 var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
3143 if (!pos || presto) return; // Opera is difficult.
3144
3145 // Reset the current text selection only if the click is done outside of the selection
3146 // and 'resetSelectionOnContextMenu' option is true.
3147 var reset = cm.options.resetSelectionOnContextMenu;
3148 if (reset && cm.doc.sel.contains(pos) == -1)
3149 operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll);
3150
3151 var oldCSS = display.input.style.cssText;
3152 display.inputDiv.style.position = "absolute";
3153 display.input.style.cssText = "position: fixed; width: 30px; height: 30px; t op: " + (e.clientY - 5) +
3154 "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: " +
3155 (ie ? "rgba(255, 255, 255, .05)" : "transparent") +
3156 "; outline: none; border-width: 0; outline: none; overflow: hidden; opacit y: .05; filter: alpha(opacity=5);";
3157 focusInput(cm);
3158 resetInput(cm);
3159 // Adds "Select all" to context menu in FF
3160 if (!cm.somethingSelected()) display.input.value = display.prevInput = " ";
3161 display.selForContextMenu = cm.doc.sel;
3162
3163 // Select-all will be greyed out if there's nothing to select, so
3164 // this adds a zero-width space so that we can later check whether
3165 // it got selected.
3166 function prepareSelectAllHack() {
3167 if (display.input.selectionStart != null) {
3168 var selected = cm.somethingSelected();
3169 var extval = display.input.value = "\u200b" + (selected ? display.input. value : "");
3170 display.prevInput = selected ? "" : "\u200b";
3171 display.input.selectionStart = 1; display.input.selectionEnd = extval.le ngth;
3172 }
3173 }
3174 function rehide() {
3175 display.inputDiv.style.position = "relative";
3176 display.input.style.cssText = oldCSS;
3177 if (ie_upto8) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
3178 slowPoll(cm);
3179
3180 // Try to detect the user choosing select-all
3181 if (display.input.selectionStart != null) {
3182 if (!ie || ie_upto8) prepareSelectAllHack();
3183 clearTimeout(detectingSelectAll);
3184 var i = 0, poll = function() {
3185 if (display.selForContextMenu == cm.doc.sel && display.input.selection Start == 0)
3186 operation(cm, commands.selectAll)(cm);
3187 else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
3188 else resetInput(cm);
3189 };
3190 detectingSelectAll = setTimeout(poll, 200);
3191 }
3192 }
3193
3194 if (ie && !ie_upto8) prepareSelectAllHack();
3195 if (captureRightClick) {
3196 e_stop(e);
3197 var mouseup = function() {
3198 off(window, "mouseup", mouseup);
3199 setTimeout(rehide, 20);
3200 };
3201 on(window, "mouseup", mouseup);
3202 } else {
3203 setTimeout(rehide, 50);
3204 }
3205 }
3206
3207 function contextMenuInGutter(cm, e) {
3208 if (!hasHandler(cm, "gutterContextMenu")) return false;
3209 return gutterEvent(cm, e, "gutterContextMenu", false, signal);
3210 }
3211
3212 // UPDATING
3213
3214 // Compute the position of the end of a change (its 'to' property
3215 // refers to the pre-change end).
3216 var changeEnd = CodeMirror.changeEnd = function(change) {
3217 if (!change.text) return change.to;
3218 return Pos(change.from.line + change.text.length - 1,
3219 lst(change.text).length + (change.text.length == 1 ? change.from. ch : 0));
3220 };
3221
3222 // Adjust a position to refer to the post-change position of the
3223 // same text, or the end of the change if the change covers it.
3224 function adjustForChange(pos, change) {
3225 if (cmp(pos, change.from) < 0) return pos;
3226 if (cmp(pos, change.to) <= 0) return changeEnd(change);
3227
3228 var line = pos.line + change.text.length - (change.to.line - change.from.lin e) - 1, ch = pos.ch;
3229 if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch;
3230 return Pos(line, ch);
3231 }
3232
3233 function computeSelAfterChange(doc, change) {
3234 var out = [];
3235 for (var i = 0; i < doc.sel.ranges.length; i++) {
3236 var range = doc.sel.ranges[i];
3237 out.push(new Range(adjustForChange(range.anchor, change),
3238 adjustForChange(range.head, change)));
3239 }
3240 return normalizeSelection(out, doc.sel.primIndex);
3241 }
3242
3243 function offsetPos(pos, old, nw) {
3244 if (pos.line == old.line)
3245 return Pos(nw.line, pos.ch - old.ch + nw.ch);
3246 else
3247 return Pos(nw.line + (pos.line - old.line), pos.ch);
3248 }
3249
3250 // Used by replaceSelections to allow moving the selection to the
3251 // start or around the replaced test. Hint may be "start" or "around".
3252 function computeReplacedSel(doc, changes, hint) {
3253 var out = [];
3254 var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
3255 for (var i = 0; i < changes.length; i++) {
3256 var change = changes[i];
3257 var from = offsetPos(change.from, oldPrev, newPrev);
3258 var to = offsetPos(changeEnd(change), oldPrev, newPrev);
3259 oldPrev = change.to;
3260 newPrev = to;
3261 if (hint == "around") {
3262 var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
3263 out[i] = new Range(inv ? to : from, inv ? from : to);
3264 } else {
3265 out[i] = new Range(from, from);
3266 }
3267 }
3268 return new Selection(out, doc.sel.primIndex);
3269 }
3270
3271 // Allow "beforeChange" event handlers to influence a change
3272 function filterChange(doc, change, update) {
3273 var obj = {
3274 canceled: false,
3275 from: change.from,
3276 to: change.to,
3277 text: change.text,
3278 origin: change.origin,
3279 cancel: function() { this.canceled = true; }
3280 };
3281 if (update) obj.update = function(from, to, text, origin) {
3282 if (from) this.from = clipPos(doc, from);
3283 if (to) this.to = clipPos(doc, to);
3284 if (text) this.text = text;
3285 if (origin !== undefined) this.origin = origin;
3286 };
3287 signal(doc, "beforeChange", doc, obj);
3288 if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);
3289
3290 if (obj.canceled) return null;
3291 return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};
3292 }
3293
3294 // Apply a change to a document, and add it to the document's
3295 // history, and propagating it to all linked documents.
3296 function makeChange(doc, change, ignoreReadOnly) {
3297 if (doc.cm) {
3298 if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignor eReadOnly);
3299 if (doc.cm.state.suppressEdits) return;
3300 }
3301
3302 if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeC hange")) {
3303 change = filterChange(doc, change, true);
3304 if (!change) return;
3305 }
3306
3307 // Possibly split or suppress the update based on the presence
3308 // of read-only spans in its range.
3309 var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
3310 if (split) {
3311 for (var i = split.length - 1; i >= 0; --i)
3312 makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [" "] : change.text});
3313 } else {
3314 makeChangeInner(doc, change);
3315 }
3316 }
3317
3318 function makeChangeInner(doc, change) {
3319 if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, chan ge.to) == 0) return;
3320 var selAfter = computeSelAfterChange(doc, change);
3321 addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
3322
3323 makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, chang e));
3324 var rebased = [];
3325
3326 linkedDocs(doc, function(doc, sharedHist) {
3327 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
3328 rebaseHist(doc.history, change);
3329 rebased.push(doc.history);
3330 }
3331 makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change) );
3332 });
3333 }
3334
3335 // Revert a change stored in a document's history.
3336 function makeChangeFromHistory(doc, type, allowSelectionOnly) {
3337 if (doc.cm && doc.cm.state.suppressEdits) return;
3338
3339 var hist = doc.history, event, selAfter = doc.sel;
3340 var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
3341
3342 // Verify that there is a useable event (so that ctrl-z won't
3343 // needlessly clear selection events)
3344 for (var i = 0; i < source.length; i++) {
3345 event = source[i];
3346 if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.r anges)
3347 break;
3348 }
3349 if (i == source.length) return;
3350 hist.lastOrigin = hist.lastSelOrigin = null;
3351
3352 for (;;) {
3353 event = source.pop();
3354 if (event.ranges) {
3355 pushSelectionToHistory(event, dest);
3356 if (allowSelectionOnly && !event.equals(doc.sel)) {
3357 setSelection(doc, event, {clearRedo: false});
3358 return;
3359 }
3360 selAfter = event;
3361 }
3362 else break;
3363 }
3364
3365 // Build up a reverse change object to add to the opposite history
3366 // stack (redo when undoing, and vice versa).
3367 var antiChanges = [];
3368 pushSelectionToHistory(selAfter, dest);
3369 dest.push({changes: antiChanges, generation: hist.generation});
3370 hist.generation = event.generation || ++hist.maxGeneration;
3371
3372 var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
3373
3374 for (var i = event.changes.length - 1; i >= 0; --i) {
3375 var change = event.changes[i];
3376 change.origin = type;
3377 if (filter && !filterChange(doc, change, false)) {
3378 source.length = 0;
3379 return;
3380 }
3381
3382 antiChanges.push(historyChangeFromChange(doc, change));
3383
3384 var after = i ? computeSelAfterChange(doc, change, null) : lst(source);
3385 makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
3386 if (doc.cm) ensureCursorVisible(doc.cm);
3387 var rebased = [];
3388
3389 // Propagate to the linked documents
3390 linkedDocs(doc, function(doc, sharedHist) {
3391 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
3392 rebaseHist(doc.history, change);
3393 rebased.push(doc.history);
3394 }
3395 makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
3396 });
3397 }
3398 }
3399
3400 // Sub-views need their line numbers shifted when text is added
3401 // above or below them in the parent document.
3402 function shiftDoc(doc, distance) {
3403 doc.first += distance;
3404 doc.sel = new Selection(map(doc.sel.ranges, function(range) {
3405 return new Range(Pos(range.anchor.line + distance, range.anchor.ch),
3406 Pos(range.head.line + distance, range.head.ch));
3407 }), doc.sel.primIndex);
3408 if (doc.cm) regChange(doc.cm, doc.first, doc.first - distance, distance);
3409 }
3410
3411 // More lower-level change function, handling only a single document
3412 // (not linked ones).
3413 function makeChangeSingleDoc(doc, change, selAfter, spans) {
3414 if (doc.cm && !doc.cm.curOp)
3415 return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans );
3416
3417 if (change.to.line < doc.first) {
3418 shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line) );
3419 return;
3420 }
3421 if (change.from.line > doc.lastLine()) return;
3422
3423 // Clip the change to the size of this doc
3424 if (change.from.line < doc.first) {
3425 var shift = change.text.length - 1 - (doc.first - change.from.line);
3426 shiftDoc(doc, shift);
3427 change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change. to.ch),
3428 text: [lst(change.text)], origin: change.origin};
3429 }
3430 var last = doc.lastLine();
3431 if (change.to.line > last) {
3432 change = {from: change.from, to: Pos(last, getLine(doc, last).text.length) ,
3433 text: [change.text[0]], origin: change.origin};
3434 }
3435
3436 change.removed = getBetween(doc, change.from, change.to);
3437
3438 if (!selAfter) selAfter = computeSelAfterChange(doc, change, null);
3439 if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans);
3440 else updateDoc(doc, change, spans);
3441 setSelectionNoUndo(doc, selAfter, sel_dontScroll);
3442 }
3443
3444 // Handle the interaction of a change to a document with the editor
3445 // that this document is part of.
3446 function makeChangeSingleDocInEditor(cm, change, spans) {
3447 var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
3448
3449 var recomputeMaxLength = false, checkWidthStart = from.line;
3450 if (!cm.options.lineWrapping) {
3451 checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
3452 doc.iter(checkWidthStart, to.line + 1, function(line) {
3453 if (line == display.maxLine) {
3454 recomputeMaxLength = true;
3455 return true;
3456 }
3457 });
3458 }
3459
3460 if (doc.sel.contains(change.from, change.to) > -1)
3461 signalCursorActivity(cm);
3462
3463 updateDoc(doc, change, spans, estimateHeight(cm));
3464
3465 if (!cm.options.lineWrapping) {
3466 doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
3467 var len = lineLength(line);
3468 if (len > display.maxLineLength) {
3469 display.maxLine = line;
3470 display.maxLineLength = len;
3471 display.maxLineChanged = true;
3472 recomputeMaxLength = false;
3473 }
3474 });
3475 if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
3476 }
3477
3478 // Adjust frontier, schedule worker
3479 doc.frontier = Math.min(doc.frontier, from.line);
3480 startWorker(cm, 400);
3481
3482 var lendiff = change.text.length - (to.line - from.line) - 1;
3483 // Remember that these lines changed, for updating the display
3484 if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm .doc, change))
3485 regLineChange(cm, from.line, "text");
3486 else
3487 regChange(cm, from.line, to.line + 1, lendiff);
3488
3489 var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(c m, "change");
3490 if (changeHandler || changesHandler) {
3491 var obj = {
3492 from: from, to: to,
3493 text: change.text,
3494 removed: change.removed,
3495 origin: change.origin
3496 };
3497 if (changeHandler) signalLater(cm, "change", cm, obj);
3498 if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).pu sh(obj);
3499 }
3500 }
3501
3502 function replaceRange(doc, code, from, to, origin) {
3503 if (!to) to = from;
3504 if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; }
3505 if (typeof code == "string") code = splitLines(code);
3506 makeChange(doc, {from: from, to: to, text: code, origin: origin});
3507 }
3508
3509 // SCROLLING THINGS INTO VIEW
3510
3511 // If an editor sits on the top or bottom of the window, partially
3512 // scrolled out of view, this ensures that the cursor is visible.
3513 function maybeScrollWindow(cm, coords) {
3514 var display = cm.display, box = display.sizer.getBoundingClientRect(), doScr oll = null;
3515 if (coords.top + box.top < 0) doScroll = true;
3516 else if (coords.bottom + box.top > (window.innerHeight || document.documentE lement.clientHeight)) doScroll = false;
3517 if (doScroll != null && !phantom) {
3518 var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
3519 (coords.top - display.viewOffset - paddingTop(cm.disp lay)) + "px; height: " +
3520 (coords.bottom - coords.top + scrollerCutOff) + "px; left: " +
3521 coords.left + "px; width: 2px;");
3522 cm.display.lineSpace.appendChild(scrollNode);
3523 scrollNode.scrollIntoView(doScroll);
3524 cm.display.lineSpace.removeChild(scrollNode);
3525 }
3526 }
3527
3528 // Scroll a given position into view (immediately), verifying that
3529 // it actually became visible (as line heights are accurately
3530 // measured, the position of something may 'drift' during drawing).
3531 function scrollPosIntoView(cm, pos, end, margin) {
3532 if (margin == null) margin = 0;
3533 for (;;) {
3534 var changed = false, coords = cursorCoords(cm, pos);
3535 var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
3536 var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.lef t),
3537 Math.min(coords.top, endCoords.top) - m argin,
3538 Math.max(coords.left, endCoords.left),
3539 Math.max(coords.bottom, endCoords.botto m) + margin);
3540 var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
3541 if (scrollPos.scrollTop != null) {
3542 setScrollTop(cm, scrollPos.scrollTop);
3543 if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
3544 }
3545 if (scrollPos.scrollLeft != null) {
3546 setScrollLeft(cm, scrollPos.scrollLeft);
3547 if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
3548 }
3549 if (!changed) return coords;
3550 }
3551 }
3552
3553 // Scroll a given set of coordinates into view (immediately).
3554 function scrollIntoView(cm, x1, y1, x2, y2) {
3555 var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
3556 if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
3557 if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
3558 }
3559
3560 // Calculate a new scroll position needed to scroll the given
3561 // rectangle into view. Returns an object with scrollTop and
3562 // scrollLeft properties. When these are undefined, the
3563 // vertical/horizontal position does not need to be adjusted.
3564 function calculateScrollPos(cm, x1, y1, x2, y2) {
3565 var display = cm.display, snapMargin = textHeight(cm.display);
3566 if (y1 < 0) y1 = 0;
3567 var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
3568 var screen = display.scroller.clientHeight - scrollerCutOff, result = {};
3569 var docBottom = cm.doc.height + paddingVert(display);
3570 var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
3571 if (y1 < screentop) {
3572 result.scrollTop = atTop ? 0 : y1;
3573 } else if (y2 > screentop + screen) {
3574 var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
3575 if (newTop != screentop) result.scrollTop = newTop;
3576 }
3577
3578 var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLe ft : display.scroller.scrollLeft;
3579 var screenw = display.scroller.clientWidth - scrollerCutOff;
3580 x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
3581 var gutterw = display.gutters.offsetWidth;
3582 var atLeft = x1 < gutterw + 10;
3583 if (x1 < screenleft + gutterw || atLeft) {
3584 if (atLeft) x1 = 0;
3585 result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
3586 } else if (x2 > screenw + screenleft - 3) {
3587 result.scrollLeft = x2 + 10 - screenw;
3588 }
3589 return result;
3590 }
3591
3592 // Store a relative adjustment to the scroll position in the current
3593 // operation (to be applied when the operation finishes).
3594 function addToScrollPos(cm, left, top) {
3595 if (left != null || top != null) resolveScrollToPos(cm);
3596 if (left != null)
3597 cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : c m.curOp.scrollLeft) + left;
3598 if (top != null)
3599 cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.c urOp.scrollTop) + top;
3600 }
3601
3602 // Make sure that at the end of the operation the current cursor is
3603 // shown.
3604 function ensureCursorVisible(cm) {
3605 resolveScrollToPos(cm);
3606 var cur = cm.getCursor(), from = cur, to = cur;
3607 if (!cm.options.lineWrapping) {
3608 from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur;
3609 to = Pos(cur.line, cur.ch + 1);
3610 }
3611 cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollM argin, isCursor: true};
3612 }
3613
3614 // When an operation has its scrollToPos property set, and another
3615 // scroll action is applied before the end of the operation, this
3616 // 'simulates' scrolling that position into view in a cheap way, so
3617 // that the effect of intermediate scroll commands is not ignored.
3618 function resolveScrollToPos(cm) {
3619 var range = cm.curOp.scrollToPos;
3620 if (range) {
3621 cm.curOp.scrollToPos = null;
3622 var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.t o);
3623 var sPos = calculateScrollPos(cm, Math.min(from.left, to.left),
3624 Math.min(from.top, to.top) - range.margin,
3625 Math.max(from.right, to.right),
3626 Math.max(from.bottom, to.bottom) + range.mar gin);
3627 cm.scrollTo(sPos.scrollLeft, sPos.scrollTop);
3628 }
3629 }
3630
3631 // API UTILITIES
3632
3633 // Indent the given line. The how parameter can be "smart",
3634 // "add"/null, "subtract", or "prev". When aggressive is false
3635 // (typically set to true for forced single-line indents), empty
3636 // lines are not indented, and places where the mode returns Pass
3637 // are left alone.
3638 function indentLine(cm, n, how, aggressive) {
3639 var doc = cm.doc, state;
3640 if (how == null) how = "add";
3641 if (how == "smart") {
3642 // Fall back to "prev" when the mode doesn't have an indentation
3643 // method.
3644 if (!cm.doc.mode.indent) how = "prev";
3645 else state = getStateBefore(cm, n);
3646 }
3647
3648 var tabSize = cm.options.tabSize;
3649 var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize) ;
3650 if (line.stateAfter) line.stateAfter = null;
3651 var curSpaceString = line.text.match(/^\s*/)[0], indentation;
3652 if (!aggressive && !/\S/.test(line.text)) {
3653 indentation = 0;
3654 how = "not";
3655 } else if (how == "smart") {
3656 indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.len gth), line.text);
3657 if (indentation == Pass) {
3658 if (!aggressive) return;
3659 how = "prev";
3660 }
3661 }
3662 if (how == "prev") {
3663 if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
3664 else indentation = 0;
3665 } else if (how == "add") {
3666 indentation = curSpace + cm.options.indentUnit;
3667 } else if (how == "subtract") {
3668 indentation = curSpace - cm.options.indentUnit;
3669 } else if (typeof how == "number") {
3670 indentation = curSpace + how;
3671 }
3672 indentation = Math.max(0, indentation);
3673
3674 var indentString = "", pos = 0;
3675 if (cm.options.indentWithTabs)
3676 for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; i ndentString += "\t";}
3677 if (pos < indentation) indentString += spaceStr(indentation - pos);
3678
3679 if (indentString != curSpaceString) {
3680 replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length ), "+input");
3681 } else {
3682 // Ensure that, if the cursor was in the whitespace at the start
3683 // of the line, it is moved to the end of that space.
3684 for (var i = 0; i < doc.sel.ranges.length; i++) {
3685 var range = doc.sel.ranges[i];
3686 if (range.head.line == n && range.head.ch < curSpaceString.length) {
3687 var pos = Pos(n, curSpaceString.length);
3688 replaceOneSelection(doc, i, new Range(pos, pos));
3689 break;
3690 }
3691 }
3692 }
3693 line.stateAfter = null;
3694 }
3695
3696 // Utility for applying a change to a line by handle or number,
3697 // returning the number and optionally registering the line as
3698 // changed.
3699 function changeLine(cm, handle, changeType, op) {
3700 var no = handle, line = handle, doc = cm.doc;
3701 if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
3702 else no = lineNo(handle);
3703 if (no == null) return null;
3704 if (op(line, no)) regLineChange(cm, no, changeType);
3705 return line;
3706 }
3707
3708 // Helper for deleting text near the selection(s), used to implement
3709 // backspace, delete, and similar functionality.
3710 function deleteNearSelection(cm, compute) {
3711 var ranges = cm.doc.sel.ranges, kill = [];
3712 // Build up a set of ranges to kill first, merging overlapping
3713 // ranges.
3714 for (var i = 0; i < ranges.length; i++) {
3715 var toKill = compute(ranges[i]);
3716 while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
3717 var replaced = kill.pop();
3718 if (cmp(replaced.from, toKill.from) < 0) {
3719 toKill.from = replaced.from;
3720 break;
3721 }
3722 }
3723 kill.push(toKill);
3724 }
3725 // Next, remove those actual ranges.
3726 runInOp(cm, function() {
3727 for (var i = kill.length - 1; i >= 0; i--)
3728 replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete");
3729 ensureCursorVisible(cm);
3730 });
3731 }
3732
3733 // Used for horizontal relative motion. Dir is -1 or 1 (left or
3734 // right), unit can be "char", "column" (like char, but doesn't
3735 // cross line boundaries), "word" (across next word), or "group" (to
3736 // the start of next group of word or non-word-non-whitespace
3737 // chars). The visually param controls whether, in right-to-left
3738 // text, direction 1 means to move towards the next index in the
3739 // string, or towards the character to the right of the current
3740 // position. The resulting position will have a hitSide=true
3741 // property if it reached the end of the document.
3742 function findPosH(doc, pos, dir, unit, visually) {
3743 var line = pos.line, ch = pos.ch, origDir = dir;
3744 var lineObj = getLine(doc, line);
3745 var possible = true;
3746 function findNextLine() {
3747 var l = line + dir;
3748 if (l < doc.first || l >= doc.first + doc.size) return (possible = false);
3749 line = l;
3750 return lineObj = getLine(doc, l);
3751 }
3752 function moveOnce(boundToLine) {
3753 var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, tru e);
3754 if (next == null) {
3755 if (!boundToLine && findNextLine()) {
3756 if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
3757 else ch = dir < 0 ? lineObj.text.length : 0;
3758 } else return (possible = false);
3759 } else ch = next;
3760 return true;
3761 }
3762
3763 if (unit == "char") moveOnce();
3764 else if (unit == "column") moveOnce(true);
3765 else if (unit == "word" || unit == "group") {
3766 var sawType = null, group = unit == "group";
3767 for (var first = true;; first = false) {
3768 if (dir < 0 && !moveOnce(!first)) break;
3769 var cur = lineObj.text.charAt(ch) || "\n";
3770 var type = isWordChar(cur) ? "w"
3771 : group && cur == "\n" ? "n"
3772 : !group || /\s/.test(cur) ? null
3773 : "p";
3774 if (group && !first && !type) type = "s";
3775 if (sawType && sawType != type) {
3776 if (dir < 0) {dir = 1; moveOnce();}
3777 break;
3778 }
3779
3780 if (type) sawType = type;
3781 if (dir > 0 && !moveOnce(!first)) break;
3782 }
3783 }
3784 var result = skipAtomic(doc, Pos(line, ch), origDir, true);
3785 if (!possible) result.hitSide = true;
3786 return result;
3787 }
3788
3789 // For relative vertical movement. Dir may be -1 or 1. Unit can be
3790 // "page" or "line". The resulting position will have a hitSide=true
3791 // property if it reached the end of the document.
3792 function findPosV(cm, pos, dir, unit) {
3793 var doc = cm.doc, x = pos.left, y;
3794 if (unit == "page") {
3795 var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeigh t || document.documentElement.clientHeight);
3796 y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.displ ay));
3797 } else if (unit == "line") {
3798 y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
3799 }
3800 for (;;) {
3801 var target = coordsChar(cm, x, y);
3802 if (!target.outside) break;
3803 if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
3804 y += dir * 5;
3805 }
3806 return target;
3807 }
3808
3809 // Find the word at the given position (as returned by coordsChar).
3810 function findWordAt(doc, pos) {
3811 var line = getLine(doc, pos.line).text;
3812 var start = pos.ch, end = pos.ch;
3813 if (line) {
3814 if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
3815 var startChar = line.charAt(start);
3816 var check = isWordChar(startChar) ? isWordChar
3817 : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
3818 : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
3819 while (start > 0 && check(line.charAt(start - 1))) --start;
3820 while (end < line.length && check(line.charAt(end))) ++end;
3821 }
3822 return new Range(Pos(pos.line, start), Pos(pos.line, end));
3823 }
3824
3825 // EDITOR METHODS
3826
3827 // The publicly visible API. Note that methodOp(f) means
3828 // 'wrap f in an operation, performed on its `this` parameter'.
3829
3830 // This is not the complete set of editor methods. Most of the
3831 // methods defined on the Doc type are also injected into
3832 // CodeMirror.prototype, for backwards compatibility and
3833 // convenience.
3834
3835 CodeMirror.prototype = {
3836 constructor: CodeMirror,
3837 focus: function(){window.focus(); focusInput(this); fastPoll(this);},
3838
3839 setOption: function(option, value) {
3840 var options = this.options, old = options[option];
3841 if (options[option] == value && option != "mode") return;
3842 options[option] = value;
3843 if (optionHandlers.hasOwnProperty(option))
3844 operation(this, optionHandlers[option])(this, value, old);
3845 },
3846
3847 getOption: function(option) {return this.options[option];},
3848 getDoc: function() {return this.doc;},
3849
3850 addKeyMap: function(map, bottom) {
3851 this.state.keyMaps[bottom ? "push" : "unshift"](map);
3852 },
3853 removeKeyMap: function(map) {
3854 var maps = this.state.keyMaps;
3855 for (var i = 0; i < maps.length; ++i)
3856 if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map )) {
3857 maps.splice(i, 1);
3858 return true;
3859 }
3860 },
3861
3862 addOverlay: methodOp(function(spec, options) {
3863 var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
3864 if (mode.startState) throw new Error("Overlays may not be stateful.");
3865 this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && o ptions.opaque});
3866 this.state.modeGen++;
3867 regChange(this);
3868 }),
3869 removeOverlay: methodOp(function(spec) {
3870 var overlays = this.state.overlays;
3871 for (var i = 0; i < overlays.length; ++i) {
3872 var cur = overlays[i].modeSpec;
3873 if (cur == spec || typeof spec == "string" && cur.name == spec) {
3874 overlays.splice(i, 1);
3875 this.state.modeGen++;
3876 regChange(this);
3877 return;
3878 }
3879 }
3880 }),
3881
3882 indentLine: methodOp(function(n, dir, aggressive) {
3883 if (typeof dir != "string" && typeof dir != "number") {
3884 if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
3885 else dir = dir ? "add" : "subtract";
3886 }
3887 if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
3888 }),
3889 indentSelection: methodOp(function(how) {
3890 var ranges = this.doc.sel.ranges, end = -1;
3891 for (var i = 0; i < ranges.length; i++) {
3892 var range = ranges[i];
3893 if (!range.empty()) {
3894 var start = Math.max(end, range.from().line);
3895 var to = range.to();
3896 end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
3897 for (var j = start; j < end; ++j)
3898 indentLine(this, j, how);
3899 } else if (range.head.line > end) {
3900 indentLine(this, range.head.line, how, true);
3901 end = range.head.line;
3902 if (i == this.doc.sel.primIndex) ensureCursorVisible(this);
3903 }
3904 }
3905 }),
3906
3907 // Fetch the parser token for a given character. Useful for hacks
3908 // that want to inspect the mode state (say, for completion).
3909 getTokenAt: function(pos, precise) {
3910 var doc = this.doc;
3911 pos = clipPos(doc, pos);
3912 var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode;
3913 var line = getLine(doc, pos.line);
3914 var stream = new StringStream(line.text, this.options.tabSize);
3915 while (stream.pos < pos.ch && !stream.eol()) {
3916 stream.start = stream.pos;
3917 var style = readToken(mode, stream, state);
3918 }
3919 return {start: stream.start,
3920 end: stream.pos,
3921 string: stream.current(),
3922 type: style || null,
3923 state: state};
3924 },
3925
3926 getTokenTypeAt: function(pos) {
3927 pos = clipPos(this.doc, pos);
3928 var styles = getLineStyles(this, getLine(this.doc, pos.line));
3929 var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
3930 var type;
3931 if (ch == 0) type = styles[2];
3932 else for (;;) {
3933 var mid = (before + after) >> 1;
3934 if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
3935 else if (styles[mid * 2 + 1] < ch) before = mid + 1;
3936 else { type = styles[mid * 2 + 2]; break; }
3937 }
3938 var cut = type ? type.indexOf("cm-overlay ") : -1;
3939 return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1);
3940 },
3941
3942 getModeAt: function(pos) {
3943 var mode = this.doc.mode;
3944 if (!mode.innerMode) return mode;
3945 return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
3946 },
3947
3948 getHelper: function(pos, type) {
3949 return this.getHelpers(pos, type)[0];
3950 },
3951
3952 getHelpers: function(pos, type) {
3953 var found = [];
3954 if (!helpers.hasOwnProperty(type)) return helpers;
3955 var help = helpers[type], mode = this.getModeAt(pos);
3956 if (typeof mode[type] == "string") {
3957 if (help[mode[type]]) found.push(help[mode[type]]);
3958 } else if (mode[type]) {
3959 for (var i = 0; i < mode[type].length; i++) {
3960 var val = help[mode[type][i]];
3961 if (val) found.push(val);
3962 }
3963 } else if (mode.helperType && help[mode.helperType]) {
3964 found.push(help[mode.helperType]);
3965 } else if (help[mode.name]) {
3966 found.push(help[mode.name]);
3967 }
3968 for (var i = 0; i < help._global.length; i++) {
3969 var cur = help._global[i];
3970 if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
3971 found.push(cur.val);
3972 }
3973 return found;
3974 },
3975
3976 getStateAfter: function(line, precise) {
3977 var doc = this.doc;
3978 line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
3979 return getStateBefore(this, line + 1, precise);
3980 },
3981
3982 cursorCoords: function(start, mode) {
3983 var pos, range = this.doc.sel.primary();
3984 if (start == null) pos = range.head;
3985 else if (typeof start == "object") pos = clipPos(this.doc, start);
3986 else pos = start ? range.from() : range.to();
3987 return cursorCoords(this, pos, mode || "page");
3988 },
3989
3990 charCoords: function(pos, mode) {
3991 return charCoords(this, clipPos(this.doc, pos), mode || "page");
3992 },
3993
3994 coordsChar: function(coords, mode) {
3995 coords = fromCoordSystem(this, coords, mode || "page");
3996 return coordsChar(this, coords.left, coords.top);
3997 },
3998
3999 lineAtHeight: function(height, mode) {
4000 height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top ;
4001 return lineAtHeight(this.doc, height + this.display.viewOffset);
4002 },
4003 heightAtLine: function(line, mode) {
4004 var end = false, last = this.doc.first + this.doc.size - 1;
4005 if (line < this.doc.first) line = this.doc.first;
4006 else if (line > last) { line = last; end = true; }
4007 var lineObj = getLine(this.doc, line);
4008 return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").t op +
4009 (end ? this.doc.height - heightAtLine(lineObj) : 0);
4010 },
4011
4012 defaultTextHeight: function() { return textHeight(this.display); },
4013 defaultCharWidth: function() { return charWidth(this.display); },
4014
4015 setGutterMarker: methodOp(function(line, gutterID, value) {
4016 return changeLine(this, line, "gutter", function(line) {
4017 var markers = line.gutterMarkers || (line.gutterMarkers = {});
4018 markers[gutterID] = value;
4019 if (!value && isEmpty(markers)) line.gutterMarkers = null;
4020 return true;
4021 });
4022 }),
4023
4024 clearGutter: methodOp(function(gutterID) {
4025 var cm = this, doc = cm.doc, i = doc.first;
4026 doc.iter(function(line) {
4027 if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
4028 line.gutterMarkers[gutterID] = null;
4029 regLineChange(cm, i, "gutter");
4030 if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
4031 }
4032 ++i;
4033 });
4034 }),
4035
4036 addLineClass: methodOp(function(handle, where, cls) {
4037 return changeLine(this, handle, "class", function(line) {
4038 var prop = where == "text" ? "textClass" : where == "background" ? "bgCl ass" : "wrapClass";
4039 if (!line[prop]) line[prop] = cls;
4040 else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) r eturn false;
4041 else line[prop] += " " + cls;
4042 return true;
4043 });
4044 }),
4045
4046 removeLineClass: methodOp(function(handle, where, cls) {
4047 return changeLine(this, handle, "class", function(line) {
4048 var prop = where == "text" ? "textClass" : where == "background" ? "bgCl ass" : "wrapClass";
4049 var cur = line[prop];
4050 if (!cur) return false;
4051 else if (cls == null) line[prop] = null;
4052 else {
4053 var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)"));
4054 if (!found) return false;
4055 var end = found.index + found[0].length;
4056 line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.l ength ? "" : " ") + cur.slice(end) || null;
4057 }
4058 return true;
4059 });
4060 }),
4061
4062 addLineWidget: methodOp(function(handle, node, options) {
4063 return addLineWidget(this, handle, node, options);
4064 }),
4065
4066 removeLineWidget: function(widget) { widget.clear(); },
4067
4068 lineInfo: function(line) {
4069 if (typeof line == "number") {
4070 if (!isLine(this.doc, line)) return null;
4071 var n = line;
4072 line = getLine(this.doc, line);
4073 if (!line) return null;
4074 } else {
4075 var n = lineNo(line);
4076 if (n == null) return null;
4077 }
4078 return {line: n, handle: line, text: line.text, gutterMarkers: line.gutter Markers,
4079 textClass: line.textClass, bgClass: line.bgClass, wrapClass: line. wrapClass,
4080 widgets: line.widgets};
4081 },
4082
4083 getViewport: function() { return {from: this.display.viewFrom, to: this.disp lay.viewTo};},
4084
4085 addWidget: function(pos, node, scroll, vert, horiz) {
4086 var display = this.display;
4087 pos = cursorCoords(this, clipPos(this.doc, pos));
4088 var top = pos.bottom, left = pos.left;
4089 node.style.position = "absolute";
4090 display.sizer.appendChild(node);
4091 if (vert == "over") {
4092 top = pos.top;
4093 } else if (vert == "above" || vert == "near") {
4094 var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
4095 hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWid th);
4096 // Default to positioning above (if specified and possible); otherwise d efault to positioning below
4097 if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos. top > node.offsetHeight)
4098 top = pos.top - node.offsetHeight;
4099 else if (pos.bottom + node.offsetHeight <= vspace)
4100 top = pos.bottom;
4101 if (left + node.offsetWidth > hspace)
4102 left = hspace - node.offsetWidth;
4103 }
4104 node.style.top = top + "px";
4105 node.style.left = node.style.right = "";
4106 if (horiz == "right") {
4107 left = display.sizer.clientWidth - node.offsetWidth;
4108 node.style.right = "0px";
4109 } else {
4110 if (horiz == "left") left = 0;
4111 else if (horiz == "middle") left = (display.sizer.clientWidth - node.off setWidth) / 2;
4112 node.style.left = left + "px";
4113 }
4114 if (scroll)
4115 scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offs etHeight);
4116 },
4117
4118 triggerOnKeyDown: methodOp(onKeyDown),
4119 triggerOnKeyPress: methodOp(onKeyPress),
4120 triggerOnKeyUp: methodOp(onKeyUp),
4121
4122 execCommand: function(cmd) {
4123 if (commands.hasOwnProperty(cmd))
4124 return commands[cmd](this);
4125 },
4126
4127 findPosH: function(from, amount, unit, visually) {
4128 var dir = 1;
4129 if (amount < 0) { dir = -1; amount = -amount; }
4130 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
4131 cur = findPosH(this.doc, cur, dir, unit, visually);
4132 if (cur.hitSide) break;
4133 }
4134 return cur;
4135 },
4136
4137 moveH: methodOp(function(dir, unit) {
4138 var cm = this;
4139 cm.extendSelectionsBy(function(range) {
4140 if (cm.display.shift || cm.doc.extend || range.empty())
4141 return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisua lly);
4142 else
4143 return dir < 0 ? range.from() : range.to();
4144 }, sel_move);
4145 }),
4146
4147 deleteH: methodOp(function(dir, unit) {
4148 var sel = this.doc.sel, doc = this.doc;
4149 if (sel.somethingSelected())
4150 doc.replaceSelection("", null, "+delete");
4151 else
4152 deleteNearSelection(this, function(range) {
4153 var other = findPosH(doc, range.head, dir, unit, false);
4154 return dir < 0 ? {from: other, to: range.head} : {from: range.head, to : other};
4155 });
4156 }),
4157
4158 findPosV: function(from, amount, unit, goalColumn) {
4159 var dir = 1, x = goalColumn;
4160 if (amount < 0) { dir = -1; amount = -amount; }
4161 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
4162 var coords = cursorCoords(this, cur, "div");
4163 if (x == null) x = coords.left;
4164 else coords.left = x;
4165 cur = findPosV(this, coords, dir, unit);
4166 if (cur.hitSide) break;
4167 }
4168 return cur;
4169 },
4170
4171 moveV: methodOp(function(dir, unit) {
4172 var cm = this, doc = this.doc, goals = [];
4173 var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelect ed();
4174 doc.extendSelectionsBy(function(range) {
4175 if (collapse)
4176 return dir < 0 ? range.from() : range.to();
4177 var headPos = cursorCoords(cm, range.head, "div");
4178 if (range.goalColumn != null) headPos.left = range.goalColumn;
4179 goals.push(headPos.left);
4180 var pos = findPosV(cm, headPos, dir, unit);
4181 if (unit == "page" && range == doc.sel.primary())
4182 addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top) ;
4183 return pos;
4184 }, sel_move);
4185 if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++)
4186 doc.sel.ranges[i].goalColumn = goals[i];
4187 }),
4188
4189 toggleOverwrite: function(value) {
4190 if (value != null && value == this.state.overwrite) return;
4191 if (this.state.overwrite = !this.state.overwrite)
4192 addClass(this.display.cursorDiv, "CodeMirror-overwrite");
4193 else
4194 rmClass(this.display.cursorDiv, "CodeMirror-overwrite");
4195
4196 signal(this, "overwriteToggle", this, this.state.overwrite);
4197 },
4198 hasFocus: function() { return activeElt() == this.display.input; },
4199
4200 scrollTo: methodOp(function(x, y) {
4201 if (x != null || y != null) resolveScrollToPos(this);
4202 if (x != null) this.curOp.scrollLeft = x;
4203 if (y != null) this.curOp.scrollTop = y;
4204 }),
4205 getScrollInfo: function() {
4206 var scroller = this.display.scroller, co = scrollerCutOff;
4207 return {left: scroller.scrollLeft, top: scroller.scrollTop,
4208 height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
4209 clientHeight: scroller.clientHeight - co, clientWidth: scroller.cl ientWidth - co};
4210 },
4211
4212 scrollIntoView: methodOp(function(range, margin) {
4213 if (range == null) {
4214 range = {from: this.doc.sel.primary().head, to: null};
4215 if (margin == null) margin = this.options.cursorScrollMargin;
4216 } else if (typeof range == "number") {
4217 range = {from: Pos(range, 0), to: null};
4218 } else if (range.from == null) {
4219 range = {from: range, to: null};
4220 }
4221 if (!range.to) range.to = range.from;
4222 range.margin = margin || 0;
4223
4224 if (range.from.line != null) {
4225 resolveScrollToPos(this);
4226 this.curOp.scrollToPos = range;
4227 } else {
4228 var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.l eft),
4229 Math.min(range.from.top, range.to.top) - r ange.margin,
4230 Math.max(range.from.right, range.to.right) ,
4231 Math.max(range.from.bottom, range.to.botto m) + range.margin);
4232 this.scrollTo(sPos.scrollLeft, sPos.scrollTop);
4233 }
4234 }),
4235
4236 setSize: methodOp(function(width, height) {
4237 function interpret(val) {
4238 return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
4239 }
4240 if (width != null) this.display.wrapper.style.width = interpret(width);
4241 if (height != null) this.display.wrapper.style.height = interpret(height);
4242 if (this.options.lineWrapping) clearLineMeasurementCache(this);
4243 this.curOp.forceUpdate = true;
4244 signal(this, "refresh", this);
4245 }),
4246
4247 operation: function(f){return runInOp(this, f);},
4248
4249 refresh: methodOp(function() {
4250 var oldHeight = this.display.cachedTextHeight;
4251 regChange(this);
4252 this.curOp.forceUpdate = true;
4253 clearCaches(this);
4254 this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop);
4255 updateGutterSpace(this);
4256 if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
4257 estimateLineHeights(this);
4258 signal(this, "refresh", this);
4259 }),
4260
4261 swapDoc: methodOp(function(doc) {
4262 var old = this.doc;
4263 old.cm = null;
4264 attachDoc(this, doc);
4265 clearCaches(this);
4266 resetInput(this);
4267 this.scrollTo(doc.scrollLeft, doc.scrollTop);
4268 signalLater(this, "swapDoc", this, old);
4269 return old;
4270 }),
4271
4272 getInputField: function(){return this.display.input;},
4273 getWrapperElement: function(){return this.display.wrapper;},
4274 getScrollerElement: function(){return this.display.scroller;},
4275 getGutterElement: function(){return this.display.gutters;}
4276 };
4277 eventMixin(CodeMirror);
4278
4279 // OPTION DEFAULTS
4280
4281 // The default configuration options.
4282 var defaults = CodeMirror.defaults = {};
4283 // Functions to run when options are changed.
4284 var optionHandlers = CodeMirror.optionHandlers = {};
4285
4286 function option(name, deflt, handle, notOnInit) {
4287 CodeMirror.defaults[name] = deflt;
4288 if (handle) optionHandlers[name] =
4289 notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old); } : handle;
4290 }
4291
4292 // Passed to option handlers when there is no old value.
4293 var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}} ;
4294
4295 // These two are, on init, called from the constructor because they
4296 // have to be initialized before the editor can start at all.
4297 option("value", "", function(cm, val) {
4298 cm.setValue(val);
4299 }, true);
4300 option("mode", null, function(cm, val) {
4301 cm.doc.modeOption = val;
4302 loadMode(cm);
4303 }, true);
4304
4305 option("indentUnit", 2, loadMode, true);
4306 option("indentWithTabs", false);
4307 option("smartIndent", true);
4308 option("tabSize", 4, function(cm) {
4309 resetModeState(cm);
4310 clearCaches(cm);
4311 regChange(cm);
4312 }, true);
4313 option("specialChars", /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\ufeff]/g, fun ction(cm, val) {
4314 cm.options.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\ t"), "g");
4315 cm.refresh();
4316 }, true);
4317 option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) { cm.refresh();}, true);
4318 option("electricChars", true);
4319 option("rtlMoveVisually", !windows);
4320 option("wholeLineUpdateBefore", true);
4321
4322 option("theme", "default", function(cm) {
4323 themeChanged(cm);
4324 guttersChanged(cm);
4325 }, true);
4326 option("keyMap", "default", keyMapChanged);
4327 option("extraKeys", null);
4328
4329 option("lineWrapping", false, wrappingChanged, true);
4330 option("gutters", [], function(cm) {
4331 setGuttersForLineNumbers(cm.options);
4332 guttersChanged(cm);
4333 }, true);
4334 option("fixedGutter", true, function(cm, val) {
4335 cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px " : "0";
4336 cm.refresh();
4337 }, true);
4338 option("coverGutterNextToScrollbar", false, updateScrollbars, true);
4339 option("lineNumbers", false, function(cm) {
4340 setGuttersForLineNumbers(cm.options);
4341 guttersChanged(cm);
4342 }, true);
4343 option("firstLineNumber", 1, guttersChanged, true);
4344 option("lineNumberFormatter", function(integer) {return integer;}, guttersChan ged, true);
4345 option("showCursorWhenSelecting", false, updateSelection, true);
4346
4347 option("resetSelectionOnContextMenu", true);
4348
4349 option("readOnly", false, function(cm, val) {
4350 if (val == "nocursor") {
4351 onBlur(cm);
4352 cm.display.input.blur();
4353 cm.display.disabled = true;
4354 } else {
4355 cm.display.disabled = false;
4356 if (!val) resetInput(cm);
4357 }
4358 });
4359 option("disableInput", false, function(cm, val) {if (!val) resetInput(cm);}, t rue);
4360 option("dragDrop", true);
4361
4362 option("cursorBlinkRate", 530);
4363 option("cursorScrollMargin", 0);
4364 option("cursorHeight", 1);
4365 option("workTime", 100);
4366 option("workDelay", 100);
4367 option("flattenSpans", true, resetModeState, true);
4368 option("addModeClass", false, resetModeState, true);
4369 option("pollInterval", 100);
4370 option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;});
4371 option("historyEventDelay", 1250);
4372 option("viewportMargin", 10, function(cm){cm.refresh();}, true);
4373 option("maxHighlightLength", 10000, resetModeState, true);
4374 option("moveInputWithCursor", true, function(cm, val) {
4375 if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0 ;
4376 });
4377
4378 option("tabindex", null, function(cm, val) {
4379 cm.display.input.tabIndex = val || "";
4380 });
4381 option("autofocus", null);
4382
4383 // MODE DEFINITION AND QUERYING
4384
4385 // Known modes, by name and by MIME
4386 var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
4387
4388 // Extra arguments are stored as the mode's dependencies, which is
4389 // used by (legacy) mechanisms like loadmode.js to automatically
4390 // load a mode. (Preferred mechanism is the require/define calls.)
4391 CodeMirror.defineMode = function(name, mode) {
4392 if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
4393 if (arguments.length > 2) {
4394 mode.dependencies = [];
4395 for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(argument s[i]);
4396 }
4397 modes[name] = mode;
4398 };
4399
4400 CodeMirror.defineMIME = function(mime, spec) {
4401 mimeModes[mime] = spec;
4402 };
4403
4404 // Given a MIME type, a {name, ...options} config object, or a name
4405 // string, return a mode config object.
4406 CodeMirror.resolveMode = function(spec) {
4407 if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
4408 spec = mimeModes[spec];
4409 } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty( spec.name)) {
4410 var found = mimeModes[spec.name];
4411 if (typeof found == "string") found = {name: found};
4412 spec = createObj(found, spec);
4413 spec.name = found.name;
4414 } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
4415 return CodeMirror.resolveMode("application/xml");
4416 }
4417 if (typeof spec == "string") return {name: spec};
4418 else return spec || {name: "null"};
4419 };
4420
4421 // Given a mode spec (anything that resolveMode accepts), find and
4422 // initialize an actual mode object.
4423 CodeMirror.getMode = function(options, spec) {
4424 var spec = CodeMirror.resolveMode(spec);
4425 var mfactory = modes[spec.name];
4426 if (!mfactory) return CodeMirror.getMode(options, "text/plain");
4427 var modeObj = mfactory(options, spec);
4428 if (modeExtensions.hasOwnProperty(spec.name)) {
4429 var exts = modeExtensions[spec.name];
4430 for (var prop in exts) {
4431 if (!exts.hasOwnProperty(prop)) continue;
4432 if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
4433 modeObj[prop] = exts[prop];
4434 }
4435 }
4436 modeObj.name = spec.name;
4437 if (spec.helperType) modeObj.helperType = spec.helperType;
4438 if (spec.modeProps) for (var prop in spec.modeProps)
4439 modeObj[prop] = spec.modeProps[prop];
4440
4441 return modeObj;
4442 };
4443
4444 // Minimal default mode.
4445 CodeMirror.defineMode("null", function() {
4446 return {token: function(stream) {stream.skipToEnd();}};
4447 });
4448 CodeMirror.defineMIME("text/plain", "null");
4449
4450 // This can be used to attach properties to mode objects from
4451 // outside the actual mode definition.
4452 var modeExtensions = CodeMirror.modeExtensions = {};
4453 CodeMirror.extendMode = function(mode, properties) {
4454 var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (mod eExtensions[mode] = {});
4455 copyObj(properties, exts);
4456 };
4457
4458 // EXTENSIONS
4459
4460 CodeMirror.defineExtension = function(name, func) {
4461 CodeMirror.prototype[name] = func;
4462 };
4463 CodeMirror.defineDocExtension = function(name, func) {
4464 Doc.prototype[name] = func;
4465 };
4466 CodeMirror.defineOption = option;
4467
4468 var initHooks = [];
4469 CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
4470
4471 var helpers = CodeMirror.helpers = {};
4472 CodeMirror.registerHelper = function(type, name, value) {
4473 if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_glob al: []};
4474 helpers[type][name] = value;
4475 };
4476 CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
4477 CodeMirror.registerHelper(type, name, value);
4478 helpers[type]._global.push({pred: predicate, val: value});
4479 };
4480
4481 // MODE STATE HANDLING
4482
4483 // Utility functions for working with state. Exported because nested
4484 // modes need to do this for their inner modes.
4485
4486 var copyState = CodeMirror.copyState = function(mode, state) {
4487 if (state === true) return state;
4488 if (mode.copyState) return mode.copyState(state);
4489 var nstate = {};
4490 for (var n in state) {
4491 var val = state[n];
4492 if (val instanceof Array) val = val.concat([]);
4493 nstate[n] = val;
4494 }
4495 return nstate;
4496 };
4497
4498 var startState = CodeMirror.startState = function(mode, a1, a2) {
4499 return mode.startState ? mode.startState(a1, a2) : true;
4500 };
4501
4502 // Given a mode and a state (for that mode), find the inner mode and
4503 // state at the position that the state refers to.
4504 CodeMirror.innerMode = function(mode, state) {
4505 while (mode.innerMode) {
4506 var info = mode.innerMode(state);
4507 if (!info || info.mode == mode) break;
4508 state = info.state;
4509 mode = info.mode;
4510 }
4511 return info || {mode: mode, state: state};
4512 };
4513
4514 // STANDARD COMMANDS
4515
4516 // Commands are parameter-less actions that can be performed on an
4517 // editor, mostly used for keybindings.
4518 var commands = CodeMirror.commands = {
4519 selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.last Line()), sel_dontScroll);},
4520 singleSelection: function(cm) {
4521 cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScro ll);
4522 },
4523 killLine: function(cm) {
4524 deleteNearSelection(cm, function(range) {
4525 if (range.empty()) {
4526 var len = getLine(cm.doc, range.head.line).text.length;
4527 if (range.head.ch == len && range.head.line < cm.lastLine())
4528 return {from: range.head, to: Pos(range.head.line + 1, 0)};
4529 else
4530 return {from: range.head, to: Pos(range.head.line, len)};
4531 } else {
4532 return {from: range.from(), to: range.to()};
4533 }
4534 });
4535 },
4536 deleteLine: function(cm) {
4537 deleteNearSelection(cm, function(range) {
4538 return {from: Pos(range.from().line, 0),
4539 to: clipPos(cm.doc, Pos(range.to().line + 1, 0))};
4540 });
4541 },
4542 delLineLeft: function(cm) {
4543 deleteNearSelection(cm, function(range) {
4544 return {from: Pos(range.from().line, 0), to: range.from()};
4545 });
4546 },
4547 undo: function(cm) {cm.undo();},
4548 redo: function(cm) {cm.redo();},
4549 undoSelection: function(cm) {cm.undoSelection();},
4550 redoSelection: function(cm) {cm.redoSelection();},
4551 goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
4552 goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
4553 goLineStart: function(cm) {
4554 cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.li ne); }, sel_move);
4555 },
4556 goLineStartSmart: function(cm) {
4557 cm.extendSelectionsBy(function(range) {
4558 var start = lineStart(cm, range.head.line);
4559 var line = cm.getLineHandle(start.line);
4560 var order = getOrder(line);
4561 if (!order || order[0].level == 0) {
4562 var firstNonWS = Math.max(0, line.text.search(/\S/));
4563 var inWS = range.head.line == start.line && range.head.ch <= firstNonW S && range.head.ch;
4564 return Pos(start.line, inWS ? 0 : firstNonWS);
4565 }
4566 return start;
4567 }, sel_move);
4568 },
4569 goLineEnd: function(cm) {
4570 cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line ); }, sel_move);
4571 },
4572 goLineRight: function(cm) {
4573 cm.extendSelectionsBy(function(range) {
4574 var top = cm.charCoords(range.head, "div").top + 5;
4575 return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: t op}, "div");
4576 }, sel_move);
4577 },
4578 goLineLeft: function(cm) {
4579 cm.extendSelectionsBy(function(range) {
4580 var top = cm.charCoords(range.head, "div").top + 5;
4581 return cm.coordsChar({left: 0, top: top}, "div");
4582 }, sel_move);
4583 },
4584 goLineUp: function(cm) {cm.moveV(-1, "line");},
4585 goLineDown: function(cm) {cm.moveV(1, "line");},
4586 goPageUp: function(cm) {cm.moveV(-1, "page");},
4587 goPageDown: function(cm) {cm.moveV(1, "page");},
4588 goCharLeft: function(cm) {cm.moveH(-1, "char");},
4589 goCharRight: function(cm) {cm.moveH(1, "char");},
4590 goColumnLeft: function(cm) {cm.moveH(-1, "column");},
4591 goColumnRight: function(cm) {cm.moveH(1, "column");},
4592 goWordLeft: function(cm) {cm.moveH(-1, "word");},
4593 goGroupRight: function(cm) {cm.moveH(1, "group");},
4594 goGroupLeft: function(cm) {cm.moveH(-1, "group");},
4595 goWordRight: function(cm) {cm.moveH(1, "word");},
4596 delCharBefore: function(cm) {cm.deleteH(-1, "char");},
4597 delCharAfter: function(cm) {cm.deleteH(1, "char");},
4598 delWordBefore: function(cm) {cm.deleteH(-1, "word");},
4599 delWordAfter: function(cm) {cm.deleteH(1, "word");},
4600 delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
4601 delGroupAfter: function(cm) {cm.deleteH(1, "group");},
4602 indentAuto: function(cm) {cm.indentSelection("smart");},
4603 indentMore: function(cm) {cm.indentSelection("add");},
4604 indentLess: function(cm) {cm.indentSelection("subtract");},
4605 insertTab: function(cm) {cm.replaceSelection("\t");},
4606 insertSoftTab: function(cm) {
4607 var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSiz e;
4608 for (var i = 0; i < ranges.length; i++) {
4609 var pos = ranges[i].from();
4610 var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
4611 spaces.push(new Array(tabSize - col % tabSize + 1).join(" "));
4612 }
4613 cm.replaceSelections(spaces);
4614 },
4615 defaultTab: function(cm) {
4616 if (cm.somethingSelected()) cm.indentSelection("add");
4617 else cm.execCommand("insertTab");
4618 },
4619 transposeChars: function(cm) {
4620 runInOp(cm, function() {
4621 var ranges = cm.listSelections();
4622 for (var i = 0; i < ranges.length; i++) {
4623 var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
4624 if (cur.ch > 0 && cur.ch < line.length - 1)
4625 cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
4626 Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1) );
4627 }
4628 });
4629 },
4630 newlineAndIndent: function(cm) {
4631 runInOp(cm, function() {
4632 var len = cm.listSelections().length;
4633 for (var i = 0; i < len; i++) {
4634 var range = cm.listSelections()[i];
4635 cm.replaceRange("\n", range.anchor, range.head, "+input");
4636 cm.indentLine(range.from().line + 1, null, true);
4637 ensureCursorVisible(cm);
4638 }
4639 });
4640 },
4641 toggleOverwrite: function(cm) {cm.toggleOverwrite();}
4642 };
4643
4644 // STANDARD KEYMAPS
4645
4646 var keyMap = CodeMirror.keyMap = {};
4647 keyMap.basic = {
4648 "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goL ineDown",
4649 "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageD own": "goPageDown",
4650 "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": " delCharBefore",
4651 "Tab": "defaultTab", "Shift-Tab": "indentAuto",
4652 "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
4653 "Esc": "singleSelection"
4654 };
4655 // Note that the save and find-related commands aren't defined by
4656 // default. User code or addons can define them. Unknown commands
4657 // are simply ignored.
4658 keyMap.pcDefault = {
4659 "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl -Z": "redo", "Ctrl-Y": "redo",
4660 "Ctrl-Home": "goDocStart", "Ctrl-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
4661 "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLin eStart", "Alt-Right": "goLineEnd",
4662 "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S" : "save", "Ctrl-F": "find",
4663 "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
4664 "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
4665 "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSe lection",
4666 fallthrough: "basic"
4667 };
4668 keyMap.macDefault = {
4669 "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
4670 "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt- Left": "goGroupLeft",
4671 "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLine End", "Alt-Backspace": "delGroupBefore",
4672 "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S ": "save", "Cmd-F": "find",
4673 "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shi ft-Cmd-Alt-F": "replaceAll",
4674 "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft" ,
4675 "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection",
4676 fallthrough: ["basic", "emacsy"]
4677 };
4678 // Very basic readline/emacs-style bindings, which are standard on Mac.
4679 keyMap.emacsy = {
4680 "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl -N": "goLineDown",
4681 "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctr l-E": "goLineEnd",
4682 "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter" , "Ctrl-H": "delCharBefore",
4683 "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLi ne", "Ctrl-T": "transposeChars"
4684 };
4685 keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
4686
4687 // KEYMAP DISPATCH
4688
4689 function getKeyMap(val) {
4690 if (typeof val == "string") return keyMap[val];
4691 else return val;
4692 }
4693
4694 // Given an array of keymaps and a key name, call handle on any
4695 // bindings found, until that returns a truthy value, at which point
4696 // we consider the key handled. Implements things like binding a key
4697 // to false stopping further handling and keymap fallthrough.
4698 var lookupKey = CodeMirror.lookupKey = function(name, maps, handle) {
4699 function lookup(map) {
4700 map = getKeyMap(map);
4701 var found = map[name];
4702 if (found === false) return "stop";
4703 if (found != null && handle(found)) return true;
4704 if (map.nofallthrough) return "stop";
4705
4706 var fallthrough = map.fallthrough;
4707 if (fallthrough == null) return false;
4708 if (Object.prototype.toString.call(fallthrough) != "[object Array]")
4709 return lookup(fallthrough);
4710 for (var i = 0; i < fallthrough.length; ++i) {
4711 var done = lookup(fallthrough[i]);
4712 if (done) return done;
4713 }
4714 return false;
4715 }
4716
4717 for (var i = 0; i < maps.length; ++i) {
4718 var done = lookup(maps[i]);
4719 if (done) return done != "stop";
4720 }
4721 };
4722
4723 // Modifier key presses don't count as 'real' key presses for the
4724 // purpose of keymap fallthrough.
4725 var isModifierKey = CodeMirror.isModifierKey = function(event) {
4726 var name = keyNames[event.keyCode];
4727 return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
4728 };
4729
4730 // Look up the name of a key as indicated by an event object.
4731 var keyName = CodeMirror.keyName = function(event, noShift) {
4732 if (presto && event.keyCode == 34 && event["char"]) return false;
4733 var name = keyNames[event.keyCode];
4734 if (name == null || event.altGraphKey) return false;
4735 if (event.altKey) name = "Alt-" + name;
4736 if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name;
4737 if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name;
4738 if (!noShift && event.shiftKey) name = "Shift-" + name;
4739 return name;
4740 };
4741
4742 // FROMTEXTAREA
4743
4744 CodeMirror.fromTextArea = function(textarea, options) {
4745 if (!options) options = {};
4746 options.value = textarea.value;
4747 if (!options.tabindex && textarea.tabindex)
4748 options.tabindex = textarea.tabindex;
4749 if (!options.placeholder && textarea.placeholder)
4750 options.placeholder = textarea.placeholder;
4751 // Set autofocus to true if this textarea is focused, or if it has
4752 // autofocus and no other element is focused.
4753 if (options.autofocus == null) {
4754 var hasFocus = activeElt();
4755 options.autofocus = hasFocus == textarea ||
4756 textarea.getAttribute("autofocus") != null && hasFocus == document.body;
4757 }
4758
4759 function save() {textarea.value = cm.getValue();}
4760 if (textarea.form) {
4761 on(textarea.form, "submit", save);
4762 // Deplorable hack to make the submit method do the right thing.
4763 if (!options.leaveSubmitMethodAlone) {
4764 var form = textarea.form, realSubmit = form.submit;
4765 try {
4766 var wrappedSubmit = form.submit = function() {
4767 save();
4768 form.submit = realSubmit;
4769 form.submit();
4770 form.submit = wrappedSubmit;
4771 };
4772 } catch(e) {}
4773 }
4774 }
4775
4776 textarea.style.display = "none";
4777 var cm = CodeMirror(function(node) {
4778 textarea.parentNode.insertBefore(node, textarea.nextSibling);
4779 }, options);
4780 cm.save = save;
4781 cm.getTextArea = function() { return textarea; };
4782 cm.toTextArea = function() {
4783 save();
4784 textarea.parentNode.removeChild(cm.getWrapperElement());
4785 textarea.style.display = "";
4786 if (textarea.form) {
4787 off(textarea.form, "submit", save);
4788 if (typeof textarea.form.submit == "function")
4789 textarea.form.submit = realSubmit;
4790 }
4791 };
4792 return cm;
4793 };
4794
4795 // STRING STREAM
4796
4797 // Fed to the mode parsers, provides helper functions to make
4798 // parsers more succinct.
4799
4800 var StringStream = CodeMirror.StringStream = function(string, tabSize) {
4801 this.pos = this.start = 0;
4802 this.string = string;
4803 this.tabSize = tabSize || 8;
4804 this.lastColumnPos = this.lastColumnValue = 0;
4805 this.lineStart = 0;
4806 };
4807
4808 StringStream.prototype = {
4809 eol: function() {return this.pos >= this.string.length;},
4810 sol: function() {return this.pos == this.lineStart;},
4811 peek: function() {return this.string.charAt(this.pos) || undefined;},
4812 next: function() {
4813 if (this.pos < this.string.length)
4814 return this.string.charAt(this.pos++);
4815 },
4816 eat: function(match) {
4817 var ch = this.string.charAt(this.pos);
4818 if (typeof match == "string") var ok = ch == match;
4819 else var ok = ch && (match.test ? match.test(ch) : match(ch));
4820 if (ok) {++this.pos; return ch;}
4821 },
4822 eatWhile: function(match) {
4823 var start = this.pos;
4824 while (this.eat(match)){}
4825 return this.pos > start;
4826 },
4827 eatSpace: function() {
4828 var start = this.pos;
4829 while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
4830 return this.pos > start;
4831 },
4832 skipToEnd: function() {this.pos = this.string.length;},
4833 skipTo: function(ch) {
4834 var found = this.string.indexOf(ch, this.pos);
4835 if (found > -1) {this.pos = found; return true;}
4836 },
4837 backUp: function(n) {this.pos -= n;},
4838 column: function() {
4839 if (this.lastColumnPos < this.start) {
4840 this.lastColumnValue = countColumn(this.string, this.start, this.tabSize , this.lastColumnPos, this.lastColumnValue);
4841 this.lastColumnPos = this.start;
4842 }
4843 return this.lastColumnValue - (this.lineStart ? countColumn(this.string, t his.lineStart, this.tabSize) : 0);
4844 },
4845 indentation: function() {
4846 return countColumn(this.string, null, this.tabSize) -
4847 (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
4848 },
4849 match: function(pattern, consume, caseInsensitive) {
4850 if (typeof pattern == "string") {
4851 var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
4852 var substr = this.string.substr(this.pos, pattern.length);
4853 if (cased(substr) == cased(pattern)) {
4854 if (consume !== false) this.pos += pattern.length;
4855 return true;
4856 }
4857 } else {
4858 var match = this.string.slice(this.pos).match(pattern);
4859 if (match && match.index > 0) return null;
4860 if (match && consume !== false) this.pos += match[0].length;
4861 return match;
4862 }
4863 },
4864 current: function(){return this.string.slice(this.start, this.pos);},
4865 hideFirstChars: function(n, inner) {
4866 this.lineStart += n;
4867 try { return inner(); }
4868 finally { this.lineStart -= n; }
4869 }
4870 };
4871
4872 // TEXTMARKERS
4873
4874 // Created with markText and setBookmark methods. A TextMarker is a
4875 // handle that can be used to clear or find a marked position in the
4876 // document. Line objects hold arrays (markedSpans) containing
4877 // {from, to, marker} object pointing to such marker objects, and
4878 // indicating that such a marker is present on that line. Multiple
4879 // lines may point to the same marker when it spans across lines.
4880 // The spans will have null for their from/to properties when the
4881 // marker continues beyond the start/end of the line. Markers have
4882 // links back to the lines they currently touch.
4883
4884 var TextMarker = CodeMirror.TextMarker = function(doc, type) {
4885 this.lines = [];
4886 this.type = type;
4887 this.doc = doc;
4888 };
4889 eventMixin(TextMarker);
4890
4891 // Clear the marker.
4892 TextMarker.prototype.clear = function() {
4893 if (this.explicitlyCleared) return;
4894 var cm = this.doc.cm, withOp = cm && !cm.curOp;
4895 if (withOp) startOperation(cm);
4896 if (hasHandler(this, "clear")) {
4897 var found = this.find();
4898 if (found) signalLater(this, "clear", found.from, found.to);
4899 }
4900 var min = null, max = null;
4901 for (var i = 0; i < this.lines.length; ++i) {
4902 var line = this.lines[i];
4903 var span = getMarkedSpanFor(line.markedSpans, this);
4904 if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text");
4905 else if (cm) {
4906 if (span.to != null) max = lineNo(line);
4907 if (span.from != null) min = lineNo(line);
4908 }
4909 line.markedSpans = removeMarkedSpan(line.markedSpans, span);
4910 if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) & & cm)
4911 updateLineHeight(line, textHeight(cm.display));
4912 }
4913 if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < th is.lines.length; ++i) {
4914 var visual = visualLine(this.lines[i]), len = lineLength(visual);
4915 if (len > cm.display.maxLineLength) {
4916 cm.display.maxLine = visual;
4917 cm.display.maxLineLength = len;
4918 cm.display.maxLineChanged = true;
4919 }
4920 }
4921
4922 if (min != null && cm && this.collapsed) regChange(cm, min, max + 1);
4923 this.lines.length = 0;
4924 this.explicitlyCleared = true;
4925 if (this.atomic && this.doc.cantEdit) {
4926 this.doc.cantEdit = false;
4927 if (cm) reCheckSelection(cm.doc);
4928 }
4929 if (cm) signalLater(cm, "markerCleared", cm, this);
4930 if (withOp) endOperation(cm);
4931 if (this.parent) this.parent.clear();
4932 };
4933
4934 // Find the position of the marker in the document. Returns a {from,
4935 // to} object by default. Side can be passed to get a specific side
4936 // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
4937 // Pos objects returned contain a line object, rather than a line
4938 // number (used to prevent looking up the same line twice).
4939 TextMarker.prototype.find = function(side, lineObj) {
4940 if (side == null && this.type == "bookmark") side = 1;
4941 var from, to;
4942 for (var i = 0; i < this.lines.length; ++i) {
4943 var line = this.lines[i];
4944 var span = getMarkedSpanFor(line.markedSpans, this);
4945 if (span.from != null) {
4946 from = Pos(lineObj ? line : lineNo(line), span.from);
4947 if (side == -1) return from;
4948 }
4949 if (span.to != null) {
4950 to = Pos(lineObj ? line : lineNo(line), span.to);
4951 if (side == 1) return to;
4952 }
4953 }
4954 return from && {from: from, to: to};
4955 };
4956
4957 // Signals that the marker's widget changed, and surrounding layout
4958 // should be recomputed.
4959 TextMarker.prototype.changed = function() {
4960 var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
4961 if (!pos || !cm) return;
4962 runInOp(cm, function() {
4963 var line = pos.line, lineN = lineNo(pos.line);
4964 var view = findViewForLine(cm, lineN);
4965 if (view) {
4966 clearLineMeasurementCacheFor(view);
4967 cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
4968 }
4969 cm.curOp.updateMaxLine = true;
4970 if (!lineIsHidden(widget.doc, line) && widget.height != null) {
4971 var oldHeight = widget.height;
4972 widget.height = null;
4973 var dHeight = widgetHeight(widget) - oldHeight;
4974 if (dHeight)
4975 updateLineHeight(line, line.height + dHeight);
4976 }
4977 });
4978 };
4979
4980 TextMarker.prototype.attachLine = function(line) {
4981 if (!this.lines.length && this.doc.cm) {
4982 var op = this.doc.cm.curOp;
4983 if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
4984 (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
4985 }
4986 this.lines.push(line);
4987 };
4988 TextMarker.prototype.detachLine = function(line) {
4989 this.lines.splice(indexOf(this.lines, line), 1);
4990 if (!this.lines.length && this.doc.cm) {
4991 var op = this.doc.cm.curOp;
4992 (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
4993 }
4994 };
4995
4996 // Collapsed markers have unique ids, in order to be able to order
4997 // them, which is needed for uniquely determining an outer marker
4998 // when they overlap (they may nest, but not partially overlap).
4999 var nextMarkerId = 0;
5000
5001 // Create a marker, wire it up to the right lines, and
5002 function markText(doc, from, to, options, type) {
5003 // Shared markers (across linked documents) are handled separately
5004 // (markTextShared will call out to this again, once per
5005 // document).
5006 if (options && options.shared) return markTextShared(doc, from, to, options, type);
5007 // Ensure we are in an operation.
5008 if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, t o, options, type);
5009
5010 var marker = new TextMarker(doc, type), diff = cmp(from, to);
5011 if (options) copyObj(options, marker, false);
5012 // Don't connect empty markers unless clearWhenEmpty is false
5013 if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
5014 return marker;
5015 if (marker.replacedWith) {
5016 // Showing up as a widget implies collapsed (widget replaces text)
5017 marker.collapsed = true;
5018 marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget" );
5019 if (!options.handleMouseEvents) marker.widgetNode.ignoreEvents = true;
5020 if (options.insertLeft) marker.widgetNode.insertLeft = true;
5021 }
5022 if (marker.collapsed) {
5023 if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
5024 from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
5025 throw new Error("Inserting collapsed marker partially overlapping an exi sting one");
5026 sawCollapsedSpans = true;
5027 }
5028
5029 if (marker.addToHistory)
5030 addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN);
5031
5032 var curLine = from.line, cm = doc.cm, updateMaxLine;
5033 doc.iter(curLine, to.line + 1, function(line) {
5034 if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
5035 updateMaxLine = true;
5036 if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
5037 addMarkedSpan(line, new MarkedSpan(marker,
5038 curLine == from.line ? from.ch : null,
5039 curLine == to.line ? to.ch : null));
5040 ++curLine;
5041 });
5042 // lineIsHidden depends on the presence of the spans, so needs a second pass
5043 if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
5044 if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
5045 });
5046
5047 if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker .clear(); });
5048
5049 if (marker.readOnly) {
5050 sawReadOnlySpans = true;
5051 if (doc.history.done.length || doc.history.undone.length)
5052 doc.clearHistory();
5053 }
5054 if (marker.collapsed) {
5055 marker.id = ++nextMarkerId;
5056 marker.atomic = true;
5057 }
5058 if (cm) {
5059 // Sync editor state
5060 if (updateMaxLine) cm.curOp.updateMaxLine = true;
5061 if (marker.collapsed)
5062 regChange(cm, from.line, to.line + 1);
5063 else if (marker.className || marker.title || marker.startStyle || marker.e ndStyle)
5064 for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text");
5065 if (marker.atomic) reCheckSelection(cm.doc);
5066 signalLater(cm, "markerAdded", cm, marker);
5067 }
5068 return marker;
5069 }
5070
5071 // SHARED TEXTMARKERS
5072
5073 // A shared marker spans multiple linked documents. It is
5074 // implemented as a meta-marker-object controlling multiple normal
5075 // markers.
5076 var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary ) {
5077 this.markers = markers;
5078 this.primary = primary;
5079 for (var i = 0; i < markers.length; ++i)
5080 markers[i].parent = this;
5081 };
5082 eventMixin(SharedTextMarker);
5083
5084 SharedTextMarker.prototype.clear = function() {
5085 if (this.explicitlyCleared) return;
5086 this.explicitlyCleared = true;
5087 for (var i = 0; i < this.markers.length; ++i)
5088 this.markers[i].clear();
5089 signalLater(this, "clear");
5090 };
5091 SharedTextMarker.prototype.find = function(side, lineObj) {
5092 return this.primary.find(side, lineObj);
5093 };
5094
5095 function markTextShared(doc, from, to, options, type) {
5096 options = copyObj(options);
5097 options.shared = false;
5098 var markers = [markText(doc, from, to, options, type)], primary = markers[0] ;
5099 var widget = options.widgetNode;
5100 linkedDocs(doc, function(doc) {
5101 if (widget) options.widgetNode = widget.cloneNode(true);
5102 markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
5103 for (var i = 0; i < doc.linked.length; ++i)
5104 if (doc.linked[i].isParent) return;
5105 primary = lst(markers);
5106 });
5107 return new SharedTextMarker(markers, primary);
5108 }
5109
5110 function findSharedMarkers(doc) {
5111 return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())),
5112 function(m) { return m.parent; });
5113 }
5114
5115 function copySharedMarkers(doc, markers) {
5116 for (var i = 0; i < markers.length; i++) {
5117 var marker = markers[i], pos = marker.find();
5118 var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
5119 if (cmp(mFrom, mTo)) {
5120 var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.t ype);
5121 marker.markers.push(subMark);
5122 subMark.parent = marker;
5123 }
5124 }
5125 }
5126
5127 function detachSharedMarkers(markers) {
5128 for (var i = 0; i < markers.length; i++) {
5129 var marker = markers[i], linked = [marker.primary.doc];;
5130 linkedDocs(marker.primary.doc, function(d) { linked.push(d); });
5131 for (var j = 0; j < marker.markers.length; j++) {
5132 var subMarker = marker.markers[j];
5133 if (indexOf(linked, subMarker.doc) == -1) {
5134 subMarker.parent = null;
5135 marker.markers.splice(j--, 1);
5136 }
5137 }
5138 }
5139 }
5140
5141 // TEXTMARKER SPANS
5142
5143 function MarkedSpan(marker, from, to) {
5144 this.marker = marker;
5145 this.from = from; this.to = to;
5146 }
5147
5148 // Search an array of spans for a span matching the given marker.
5149 function getMarkedSpanFor(spans, marker) {
5150 if (spans) for (var i = 0; i < spans.length; ++i) {
5151 var span = spans[i];
5152 if (span.marker == marker) return span;
5153 }
5154 }
5155 // Remove a span from an array, returning undefined if no spans are
5156 // left (we don't store arrays for lines without spans).
5157 function removeMarkedSpan(spans, span) {
5158 for (var r, i = 0; i < spans.length; ++i)
5159 if (spans[i] != span) (r || (r = [])).push(spans[i]);
5160 return r;
5161 }
5162 // Add a span to a line.
5163 function addMarkedSpan(line, span) {
5164 line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [spa n];
5165 span.marker.attachLine(line);
5166 }
5167
5168 // Used for the algorithm that adjusts markers for a change in the
5169 // document. These functions cut an array of spans at a given
5170 // character position, returning an array of remaining chunks (or
5171 // undefined if nothing remains).
5172 function markedSpansBefore(old, startCh, isInsert) {
5173 if (old) for (var i = 0, nw; i < old.length; ++i) {
5174 var span = old[i], marker = span.marker;
5175 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
5176 if (startsBefore || span.from == startCh && marker.type == "bookmark" && ( !isInsert || !span.marker.insertLeft)) {
5177 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= s tartCh : span.to > startCh);
5178 (nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? nul l : span.to));
5179 }
5180 }
5181 return nw;
5182 }
5183 function markedSpansAfter(old, endCh, isInsert) {
5184 if (old) for (var i = 0, nw; i < old.length; ++i) {
5185 var span = old[i], marker = span.marker;
5186 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= end Ch : span.to > endCh);
5187 if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isIn sert || span.marker.insertLeft)) {
5188 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.fro m <= endCh : span.from < endCh);
5189 (nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span .from - endCh,
5190 span.to == null ? null : span.to - endCh));
5191 }
5192 }
5193 return nw;
5194 }
5195
5196 // Given a change object, compute the new set of marker spans that
5197 // cover the line in which the change took place. Removes spans
5198 // entirely within the change, reconnects spans belonging to the
5199 // same marker that appear on both sides of the change, and cuts off
5200 // spans partially within the change. Returns an array of span
5201 // arrays with one element for each line in (after) the change.
5202 function stretchSpansOverChange(doc, change) {
5203 var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.lin e).markedSpans;
5204 var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).ma rkedSpans;
5205 if (!oldFirst && !oldLast) return null;
5206
5207 var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.fr om, change.to) == 0;
5208 // Get the spans that 'stick out' on both sides
5209 var first = markedSpansBefore(oldFirst, startCh, isInsert);
5210 var last = markedSpansAfter(oldLast, endCh, isInsert);
5211
5212 // Next, merge those two ends
5213 var sameLine = change.text.length == 1, offset = lst(change.text).length + ( sameLine ? startCh : 0);
5214 if (first) {
5215 // Fix up .to properties of first
5216 for (var i = 0; i < first.length; ++i) {
5217 var span = first[i];
5218 if (span.to == null) {
5219 var found = getMarkedSpanFor(last, span.marker);
5220 if (!found) span.to = startCh;
5221 else if (sameLine) span.to = found.to == null ? null : found.to + offs et;
5222 }
5223 }
5224 }
5225 if (last) {
5226 // Fix up .from in last (or move them into first in case of sameLine)
5227 for (var i = 0; i < last.length; ++i) {
5228 var span = last[i];
5229 if (span.to != null) span.to += offset;
5230 if (span.from == null) {
5231 var found = getMarkedSpanFor(first, span.marker);
5232 if (!found) {
5233 span.from = offset;
5234 if (sameLine) (first || (first = [])).push(span);
5235 }
5236 } else {
5237 span.from += offset;
5238 if (sameLine) (first || (first = [])).push(span);
5239 }
5240 }
5241 }
5242 // Make sure we didn't create any zero-length spans
5243 if (first) first = clearEmptySpans(first);
5244 if (last && last != first) last = clearEmptySpans(last);
5245
5246 var newMarkers = [first];
5247 if (!sameLine) {
5248 // Fill gap with whole-line-spans
5249 var gap = change.text.length - 2, gapMarkers;
5250 if (gap > 0 && first)
5251 for (var i = 0; i < first.length; ++i)
5252 if (first[i].to == null)
5253 (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marke r, null, null));
5254 for (var i = 0; i < gap; ++i)
5255 newMarkers.push(gapMarkers);
5256 newMarkers.push(last);
5257 }
5258 return newMarkers;
5259 }
5260
5261 // Remove spans that are empty and don't have a clearWhenEmpty
5262 // option of false.
5263 function clearEmptySpans(spans) {
5264 for (var i = 0; i < spans.length; ++i) {
5265 var span = spans[i];
5266 if (span.from != null && span.from == span.to && span.marker.clearWhenEmpt y !== false)
5267 spans.splice(i--, 1);
5268 }
5269 if (!spans.length) return null;
5270 return spans;
5271 }
5272
5273 // Used for un/re-doing changes from the history. Combines the
5274 // result of computing the existing spans with the set of spans that
5275 // existed in the history (so that deleting around a span and then
5276 // undoing brings back the span).
5277 function mergeOldSpans(doc, change) {
5278 var old = getOldSpans(doc, change);
5279 var stretched = stretchSpansOverChange(doc, change);
5280 if (!old) return stretched;
5281 if (!stretched) return old;
5282
5283 for (var i = 0; i < old.length; ++i) {
5284 var oldCur = old[i], stretchCur = stretched[i];
5285 if (oldCur && stretchCur) {
5286 spans: for (var j = 0; j < stretchCur.length; ++j) {
5287 var span = stretchCur[j];
5288 for (var k = 0; k < oldCur.length; ++k)
5289 if (oldCur[k].marker == span.marker) continue spans;
5290 oldCur.push(span);
5291 }
5292 } else if (stretchCur) {
5293 old[i] = stretchCur;
5294 }
5295 }
5296 return old;
5297 }
5298
5299 // Used to 'clip' out readOnly ranges when making a change.
5300 function removeReadOnlyRanges(doc, from, to) {
5301 var markers = null;
5302 doc.iter(from.line, to.line + 1, function(line) {
5303 if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
5304 var mark = line.markedSpans[i].marker;
5305 if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
5306 (markers || (markers = [])).push(mark);
5307 }
5308 });
5309 if (!markers) return null;
5310 var parts = [{from: from, to: to}];
5311 for (var i = 0; i < markers.length; ++i) {
5312 var mk = markers[i], m = mk.find(0);
5313 for (var j = 0; j < parts.length; ++j) {
5314 var p = parts[j];
5315 if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue;
5316 var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to );
5317 if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
5318 newParts.push({from: p.from, to: m.from});
5319 if (dto > 0 || !mk.inclusiveRight && !dto)
5320 newParts.push({from: m.to, to: p.to});
5321 parts.splice.apply(parts, newParts);
5322 j += newParts.length - 1;
5323 }
5324 }
5325 return parts;
5326 }
5327
5328 // Connect or disconnect spans from a line.
5329 function detachMarkedSpans(line) {
5330 var spans = line.markedSpans;
5331 if (!spans) return;
5332 for (var i = 0; i < spans.length; ++i)
5333 spans[i].marker.detachLine(line);
5334 line.markedSpans = null;
5335 }
5336 function attachMarkedSpans(line, spans) {
5337 if (!spans) return;
5338 for (var i = 0; i < spans.length; ++i)
5339 spans[i].marker.attachLine(line);
5340 line.markedSpans = spans;
5341 }
5342
5343 // Helpers used when computing which overlapping collapsed span
5344 // counts as the larger one.
5345 function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
5346 function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }
5347
5348 // Returns a number indicating which of two overlapping collapsed
5349 // spans is larger (and thus includes the other). Falls back to
5350 // comparing ids when the spans cover exactly the same range.
5351 function compareCollapsedMarkers(a, b) {
5352 var lenDiff = a.lines.length - b.lines.length;
5353 if (lenDiff != 0) return lenDiff;
5354 var aPos = a.find(), bPos = b.find();
5355 var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
5356 if (fromCmp) return -fromCmp;
5357 var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
5358 if (toCmp) return toCmp;
5359 return b.id - a.id;
5360 }
5361
5362 // Find out whether a line ends or starts in a collapsed span. If
5363 // so, return the marker for that span.
5364 function collapsedSpanAtSide(line, start) {
5365 var sps = sawCollapsedSpans && line.markedSpans, found;
5366 if (sps) for (var sp, i = 0; i < sps.length; ++i) {
5367 sp = sps[i];
5368 if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
5369 (!found || compareCollapsedMarkers(found, sp.marker) < 0))
5370 found = sp.marker;
5371 }
5372 return found;
5373 }
5374 function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
5375 function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }
5376
5377 // Test whether there exists a collapsed span that partially
5378 // overlaps (covers the start or end, but not both) of a new span.
5379 // Such overlap is not allowed.
5380 function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
5381 var line = getLine(doc, lineNo);
5382 var sps = sawCollapsedSpans && line.markedSpans;
5383 if (sps) for (var i = 0; i < sps.length; ++i) {
5384 var sp = sps[i];
5385 if (!sp.marker.collapsed) continue;
5386 var found = sp.marker.find(0);
5387 var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(ma rker);
5388 var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker );
5389 if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
5390 if (fromCmp <= 0 && (cmp(found.to, from) || extraRight(sp.marker) - extraL eft(marker)) > 0 ||
5391 fromCmp >= 0 && (cmp(found.from, to) || extraLeft(sp.marker) - extraRi ght(marker)) < 0)
5392 return true;
5393 }
5394 }
5395
5396 // A visual line is a line as drawn on the screen. Folding, for
5397 // example, can cause multiple logical lines to appear on the same
5398 // visual line. This finds the start of the visual line that the
5399 // given line is part of (usually that is the line itself).
5400 function visualLine(line) {
5401 var merged;
5402 while (merged = collapsedSpanAtStart(line))
5403 line = merged.find(-1, true).line;
5404 return line;
5405 }
5406
5407 // Returns an array of logical lines that continue the visual line
5408 // started by the argument, or undefined if there are no such lines.
5409 function visualLineContinued(line) {
5410 var merged, lines;
5411 while (merged = collapsedSpanAtEnd(line)) {
5412 line = merged.find(1, true).line;
5413 (lines || (lines = [])).push(line);
5414 }
5415 return lines;
5416 }
5417
5418 // Get the line number of the start of the visual line that the
5419 // given line number is part of.
5420 function visualLineNo(doc, lineN) {
5421 var line = getLine(doc, lineN), vis = visualLine(line);
5422 if (line == vis) return lineN;
5423 return lineNo(vis);
5424 }
5425 // Get the line number of the start of the next visual line after
5426 // the given line.
5427 function visualLineEndNo(doc, lineN) {
5428 if (lineN > doc.lastLine()) return lineN;
5429 var line = getLine(doc, lineN), merged;
5430 if (!lineIsHidden(doc, line)) return lineN;
5431 while (merged = collapsedSpanAtEnd(line))
5432 line = merged.find(1, true).line;
5433 return lineNo(line) + 1;
5434 }
5435
5436 // Compute whether a line is hidden. Lines count as hidden when they
5437 // are part of a visual line that starts with another line, or when
5438 // they are entirely covered by collapsed, non-widget span.
5439 function lineIsHidden(doc, line) {
5440 var sps = sawCollapsedSpans && line.markedSpans;
5441 if (sps) for (var sp, i = 0; i < sps.length; ++i) {
5442 sp = sps[i];
5443 if (!sp.marker.collapsed) continue;
5444 if (sp.from == null) return true;
5445 if (sp.marker.widgetNode) continue;
5446 if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line , sp))
5447 return true;
5448 }
5449 }
5450 function lineIsHiddenInner(doc, line, span) {
5451 if (span.to == null) {
5452 var end = span.marker.find(1, true);
5453 return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSp ans, span.marker));
5454 }
5455 if (span.marker.inclusiveRight && span.to == line.text.length)
5456 return true;
5457 for (var sp, i = 0; i < line.markedSpans.length; ++i) {
5458 sp = line.markedSpans[i];
5459 if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
5460 (sp.to == null || sp.to != span.from) &&
5461 (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
5462 lineIsHiddenInner(doc, line, sp)) return true;
5463 }
5464 }
5465
5466 // LINE WIDGETS
5467
5468 // Line widgets are block elements displayed above or below a line.
5469
5470 var LineWidget = CodeMirror.LineWidget = function(cm, node, options) {
5471 if (options) for (var opt in options) if (options.hasOwnProperty(opt))
5472 this[opt] = options[opt];
5473 this.cm = cm;
5474 this.node = node;
5475 };
5476 eventMixin(LineWidget);
5477
5478 function adjustScrollWhenAboveVisible(cm, line, diff) {
5479 if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollT op))
5480 addToScrollPos(cm, null, diff);
5481 }
5482
5483 LineWidget.prototype.clear = function() {
5484 var cm = this.cm, ws = this.line.widgets, line = this.line, no = lineNo(line );
5485 if (no == null || !ws) return;
5486 for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
5487 if (!ws.length) line.widgets = null;
5488 var height = widgetHeight(this);
5489 runInOp(cm, function() {
5490 adjustScrollWhenAboveVisible(cm, line, -height);
5491 regLineChange(cm, no, "widget");
5492 updateLineHeight(line, Math.max(0, line.height - height));
5493 });
5494 };
5495 LineWidget.prototype.changed = function() {
5496 var oldH = this.height, cm = this.cm, line = this.line;
5497 this.height = null;
5498 var diff = widgetHeight(this) - oldH;
5499 if (!diff) return;
5500 runInOp(cm, function() {
5501 cm.curOp.forceUpdate = true;
5502 adjustScrollWhenAboveVisible(cm, line, diff);
5503 updateLineHeight(line, line.height + diff);
5504 });
5505 };
5506
5507 function widgetHeight(widget) {
5508 if (widget.height != null) return widget.height;
5509 if (!contains(document.body, widget.node))
5510 removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
5511 return widget.height = widget.node.offsetHeight;
5512 }
5513
5514 function addLineWidget(cm, handle, node, options) {
5515 var widget = new LineWidget(cm, node, options);
5516 if (widget.noHScroll) cm.display.alignWidgets = true;
5517 changeLine(cm, handle, "widget", function(line) {
5518 var widgets = line.widgets || (line.widgets = []);
5519 if (widget.insertAt == null) widgets.push(widget);
5520 else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insert At)), 0, widget);
5521 widget.line = line;
5522 if (!lineIsHidden(cm.doc, line)) {
5523 var aboveVisible = heightAtLine(line) < cm.doc.scrollTop;
5524 updateLineHeight(line, line.height + widgetHeight(widget));
5525 if (aboveVisible) addToScrollPos(cm, null, widget.height);
5526 cm.curOp.forceUpdate = true;
5527 }
5528 return true;
5529 });
5530 return widget;
5531 }
5532
5533 // LINE DATA STRUCTURE
5534
5535 // Line objects. These hold state related to a line, including
5536 // highlighting info (the styles array).
5537 var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
5538 this.text = text;
5539 attachMarkedSpans(this, markedSpans);
5540 this.height = estimateHeight ? estimateHeight(this) : 1;
5541 };
5542 eventMixin(Line);
5543 Line.prototype.lineNo = function() { return lineNo(this); };
5544
5545 // Change the content (text, markers) of a line. Automatically
5546 // invalidates cached information and tries to re-estimate the
5547 // line's height.
5548 function updateLine(line, text, markedSpans, estimateHeight) {
5549 line.text = text;
5550 if (line.stateAfter) line.stateAfter = null;
5551 if (line.styles) line.styles = null;
5552 if (line.order != null) line.order = null;
5553 detachMarkedSpans(line);
5554 attachMarkedSpans(line, markedSpans);
5555 var estHeight = estimateHeight ? estimateHeight(line) : 1;
5556 if (estHeight != line.height) updateLineHeight(line, estHeight);
5557 }
5558
5559 // Detach a line from the document tree and its markers.
5560 function cleanUpLine(line) {
5561 line.parent = null;
5562 detachMarkedSpans(line);
5563 }
5564
5565 function extractLineClasses(type, output) {
5566 if (type) for (;;) {
5567 var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
5568 if (!lineClass) break;
5569 type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineC lass[0].length);
5570 var prop = lineClass[1] ? "bgClass" : "textClass";
5571 if (output[prop] == null)
5572 output[prop] = lineClass[2];
5573 else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output [prop]))
5574 output[prop] += " " + lineClass[2];
5575 }
5576 return type;
5577 }
5578
5579 function callBlankLine(mode, state) {
5580 if (mode.blankLine) return mode.blankLine(state);
5581 if (!mode.innerMode) return;
5582 var inner = CodeMirror.innerMode(mode, state);
5583 if (inner.mode.blankLine) return inner.mode.blankLine(inner.state);
5584 }
5585
5586 function readToken(mode, stream, state) {
5587 var style = mode.token(stream, state);
5588 if (stream.pos <= stream.start)
5589 throw new Error("Mode " + mode.name + " failed to advance stream.");
5590 return style;
5591 }
5592
5593 // Run the given mode's parser over a line, calling f for each token.
5594 function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) {
5595 var flattenSpans = mode.flattenSpans;
5596 if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
5597 var curStart = 0, curStyle = null;
5598 var stream = new StringStream(text, cm.options.tabSize), style;
5599 if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses);
5600 while (!stream.eol()) {
5601 if (stream.pos > cm.options.maxHighlightLength) {
5602 flattenSpans = false;
5603 if (forceToEnd) processLine(cm, text, state, stream.pos);
5604 stream.pos = text.length;
5605 style = null;
5606 } else {
5607 style = extractLineClasses(readToken(mode, stream, state), lineClasses);
5608 }
5609 if (cm.options.addModeClass) {
5610 var mName = CodeMirror.innerMode(mode, state).mode.name;
5611 if (mName) style = "m-" + (style ? mName + " " + style : mName);
5612 }
5613 if (!flattenSpans || curStyle != style) {
5614 if (curStart < stream.start) f(stream.start, curStyle);
5615 curStart = stream.start; curStyle = style;
5616 }
5617 stream.start = stream.pos;
5618 }
5619 while (curStart < stream.pos) {
5620 // Webkit seems to refuse to render text nodes longer than 57444 character s
5621 var pos = Math.min(stream.pos, curStart + 50000);
5622 f(pos, curStyle);
5623 curStart = pos;
5624 }
5625 }
5626
5627 // Compute a style array (an array starting with a mode generation
5628 // -- for invalidation -- followed by pairs of end positions and
5629 // style strings), which is used to highlight the tokens on the
5630 // line.
5631 function highlightLine(cm, line, state, forceToEnd) {
5632 // A styles array always starts with a number identifying the
5633 // mode/overlays that it is based on (for easy invalidation).
5634 var st = [cm.state.modeGen], lineClasses = {};
5635 // Compute the base array of styles
5636 runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
5637 st.push(end, style);
5638 }, lineClasses, forceToEnd);
5639
5640 // Run overlays, adjust style array.
5641 for (var o = 0; o < cm.state.overlays.length; ++o) {
5642 var overlay = cm.state.overlays[o], i = 1, at = 0;
5643 runMode(cm, line.text, overlay.mode, true, function(end, style) {
5644 var start = i;
5645 // Ensure there's a token end at the current position, and that i points at it
5646 while (at < end) {
5647 var i_end = st[i];
5648 if (i_end > end)
5649 st.splice(i, 1, end, st[i+1], i_end);
5650 i += 2;
5651 at = Math.min(end, i_end);
5652 }
5653 if (!style) return;
5654 if (overlay.opaque) {
5655 st.splice(start, i - start, end, "cm-overlay " + style);
5656 i = start + 2;
5657 } else {
5658 for (; start < i; start += 2) {
5659 var cur = st[start+1];
5660 st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style;
5661 }
5662 }
5663 }, lineClasses);
5664 }
5665
5666 return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null};
5667 }
5668
5669 function getLineStyles(cm, line) {
5670 if (!line.styles || line.styles[0] != cm.state.modeGen) {
5671 var result = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
5672 line.styles = result.styles;
5673 if (result.classes) line.styleClasses = result.classes;
5674 else if (line.styleClasses) line.styleClasses = null;
5675 }
5676 return line.styles;
5677 }
5678
5679 // Lightweight form of highlight -- proceed over this line and
5680 // update state, but don't save a style array. Used for lines that
5681 // aren't currently visible.
5682 function processLine(cm, text, state, startAt) {
5683 var mode = cm.doc.mode;
5684 var stream = new StringStream(text, cm.options.tabSize);
5685 stream.start = stream.pos = startAt || 0;
5686 if (text == "") callBlankLine(mode, state);
5687 while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
5688 readToken(mode, stream, state);
5689 stream.start = stream.pos;
5690 }
5691 }
5692
5693 // Convert a style as returned by a mode (either null, or a string
5694 // containing one or more styles) to a CSS style. This is cached,
5695 // and also looks for line-wide styles.
5696 var styleToClassCache = {}, styleToClassCacheWithMode = {};
5697 function interpretTokenStyle(style, options) {
5698 if (!style || /^\s*$/.test(style)) return null;
5699 var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassC ache;
5700 return cache[style] ||
5701 (cache[style] = style.replace(/\S+/g, "cm-$&"));
5702 }
5703
5704 // Render the DOM representation of the text of a line. Also builds
5705 // up a 'line map', which points at the DOM nodes that represent
5706 // specific stretches of text, and is used by the measuring code.
5707 // The returned object contains the DOM node, this map, and
5708 // information about line-wide styles that were set by the mode.
5709 function buildLineContent(cm, lineView) {
5710 // The padding-right forces the element to have a 'border', which
5711 // is needed on Webkit to be able to get line-level bounding
5712 // rectangles for it (in measureChar).
5713 var content = elt("span", null, null, webkit ? "padding-right: .1px" : null) ;
5714 var builder = {pre: elt("pre", [content]), content: content, col: 0, pos: 0, cm: cm};
5715 lineView.measure = {};
5716
5717 // Iterate over the logical lines that make up this visual line.
5718 for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
5719 var line = i ? lineView.rest[i - 1] : lineView.line, order;
5720 builder.pos = 0;
5721 builder.addToken = buildToken;
5722 // Optionally wire in some hacks into the token-rendering
5723 // algorithm, to deal with browser quirks.
5724 if ((ie || webkit) && cm.getOption("lineWrapping"))
5725 builder.addToken = buildTokenSplitSpaces(builder.addToken);
5726 if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line)))
5727 builder.addToken = buildTokenBadBidi(builder.addToken, order);
5728 builder.map = [];
5729 insertLineContent(line, builder, getLineStyles(cm, line));
5730 if (line.styleClasses) {
5731 if (line.styleClasses.bgClass)
5732 builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgCla ss || "");
5733 if (line.styleClasses.textClass)
5734 builder.textClass = joinClasses(line.styleClasses.textClass, builder.t extClass || "");
5735 }
5736
5737 // Ensure at least a single node is present, for measuring.
5738 if (builder.map.length == 0)
5739 builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.d isplay.measure)));
5740
5741 // Store the map and a cache object for the current logical line
5742 if (i == 0) {
5743 lineView.measure.map = builder.map;
5744 lineView.measure.cache = {};
5745 } else {
5746 (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map );
5747 (lineView.measure.caches || (lineView.measure.caches = [])).push({});
5748 }
5749 }
5750
5751 signal(cm, "renderLine", cm, lineView.line, builder.pre);
5752 return builder;
5753 }
5754
5755 function defaultSpecialCharPlaceholder(ch) {
5756 var token = elt("span", "\u2022", "cm-invalidchar");
5757 token.title = "\\u" + ch.charCodeAt(0).toString(16);
5758 return token;
5759 }
5760
5761 // Build up the DOM representation for a single token, and add it to
5762 // the line map. Takes care to render special characters separately.
5763 function buildToken(builder, text, style, startStyle, endStyle, title) {
5764 if (!text) return;
5765 var special = builder.cm.options.specialChars, mustWrap = false;
5766 if (!special.test(text)) {
5767 builder.col += text.length;
5768 var content = document.createTextNode(text);
5769 builder.map.push(builder.pos, builder.pos + text.length, content);
5770 if (ie_upto8) mustWrap = true;
5771 builder.pos += text.length;
5772 } else {
5773 var content = document.createDocumentFragment(), pos = 0;
5774 while (true) {
5775 special.lastIndex = pos;
5776 var m = special.exec(text);
5777 var skipped = m ? m.index - pos : text.length - pos;
5778 if (skipped) {
5779 var txt = document.createTextNode(text.slice(pos, pos + skipped));
5780 if (ie_upto8) content.appendChild(elt("span", [txt]));
5781 else content.appendChild(txt);
5782 builder.map.push(builder.pos, builder.pos + skipped, txt);
5783 builder.col += skipped;
5784 builder.pos += skipped;
5785 }
5786 if (!m) break;
5787 pos += skipped + 1;
5788 if (m[0] == "\t") {
5789 var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder .col % tabSize;
5790 var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab" ));
5791 builder.col += tabWidth;
5792 } else {
5793 var txt = builder.cm.options.specialCharPlaceholder(m[0]);
5794 if (ie_upto8) content.appendChild(elt("span", [txt]));
5795 else content.appendChild(txt);
5796 builder.col += 1;
5797 }
5798 builder.map.push(builder.pos, builder.pos + 1, txt);
5799 builder.pos++;
5800 }
5801 }
5802 if (style || startStyle || endStyle || mustWrap) {
5803 var fullStyle = style || "";
5804 if (startStyle) fullStyle += startStyle;
5805 if (endStyle) fullStyle += endStyle;
5806 var token = elt("span", [content], fullStyle);
5807 if (title) token.title = title;
5808 return builder.content.appendChild(token);
5809 }
5810 builder.content.appendChild(content);
5811 }
5812
5813 function buildTokenSplitSpaces(inner) {
5814 function split(old) {
5815 var out = " ";
5816 for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
5817 out += " ";
5818 return out;
5819 }
5820 return function(builder, text, style, startStyle, endStyle, title) {
5821 inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle, title);
5822 };
5823 }
5824
5825 // Work around nonsense dimensions being reported for stretches of
5826 // right-to-left text.
5827 function buildTokenBadBidi(inner, order) {
5828 return function(builder, text, style, startStyle, endStyle, title) {
5829 style = style ? style + " cm-force-border" : "cm-force-border";
5830 var start = builder.pos, end = start + text.length;
5831 for (;;) {
5832 // Find the part that overlaps with the start of this text
5833 for (var i = 0; i < order.length; i++) {
5834 var part = order[i];
5835 if (part.to > start && part.from <= start) break;
5836 }
5837 if (part.to >= end) return inner(builder, text, style, startStyle, endSt yle, title);
5838 inner(builder, text.slice(0, part.to - start), style, startStyle, null, title);
5839 startStyle = null;
5840 text = text.slice(part.to - start);
5841 start = part.to;
5842 }
5843 };
5844 }
5845
5846 function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
5847 var widget = !ignoreWidget && marker.widgetNode;
5848 if (widget) {
5849 builder.map.push(builder.pos, builder.pos + size, widget);
5850 builder.content.appendChild(widget);
5851 }
5852 builder.pos += size;
5853 }
5854
5855 // Outputs a number of spans to make up a line, taking highlighting
5856 // and marked text into account.
5857 function insertLineContent(line, builder, styles) {
5858 var spans = line.markedSpans, allText = line.text, at = 0;
5859 if (!spans) {
5860 for (var i = 1; i < styles.length; i+=2)
5861 builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTo kenStyle(styles[i+1], builder.cm.options));
5862 return;
5863 }
5864
5865 var len = allText.length, pos = 0, i = 1, text = "", style;
5866 var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapse d;
5867 for (;;) {
5868 if (nextChange == pos) { // Update current marker set
5869 spanStyle = spanEndStyle = spanStartStyle = title = "";
5870 collapsed = null; nextChange = Infinity;
5871 var foundBookmarks = [];
5872 for (var j = 0; j < spans.length; ++j) {
5873 var sp = spans[j], m = sp.marker;
5874 if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
5875 if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanE ndStyle = ""; }
5876 if (m.className) spanStyle += " " + m.className;
5877 if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startS tyle;
5878 if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endSt yle;
5879 if (m.title && !title) title = m.title;
5880 if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed. marker, m) < 0))
5881 collapsed = sp;
5882 } else if (sp.from > pos && nextChange > sp.from) {
5883 nextChange = sp.from;
5884 }
5885 if (m.type == "bookmark" && sp.from == pos && m.widgetNode) foundBookm arks.push(m);
5886 }
5887 if (collapsed && (collapsed.from || 0) == pos) {
5888 buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapse d.to) - pos,
5889 collapsed.marker, collapsed.from == null);
5890 if (collapsed.to == null) return;
5891 }
5892 if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookma rks.length; ++j)
5893 buildCollapsedSpan(builder, 0, foundBookmarks[j]);
5894 }
5895 if (pos >= len) break;
5896
5897 var upto = Math.min(len, nextChange);
5898 while (true) {
5899 if (text) {
5900 var end = pos + text.length;
5901 if (!collapsed) {
5902 var tokenText = end > upto ? text.slice(0, upto - pos) : text;
5903 builder.addToken(builder, tokenText, style ? style + spanStyle : spa nStyle,
5904 spanStartStyle, pos + tokenText.length == nextChang e ? spanEndStyle : "", title);
5905 }
5906 if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
5907 pos = end;
5908 spanStartStyle = "";
5909 }
5910 text = allText.slice(at, at = styles[i++]);
5911 style = interpretTokenStyle(styles[i++], builder.cm.options);
5912 }
5913 }
5914 }
5915
5916 // DOCUMENT DATA STRUCTURE
5917
5918 // By default, updates that start and end at the beginning of a line
5919 // are treated specially, in order to make the association of line
5920 // widgets and marker elements with the text behave more intuitive.
5921 function isWholeLineUpdate(doc, change) {
5922 return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
5923 (!doc.cm || doc.cm.options.wholeLineUpdateBefore);
5924 }
5925
5926 // Perform a change on the document data structure.
5927 function updateDoc(doc, change, markedSpans, estimateHeight) {
5928 function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
5929 function update(line, text, spans) {
5930 updateLine(line, text, spans, estimateHeight);
5931 signalLater(line, "change", line, change);
5932 }
5933
5934 var from = change.from, to = change.to, text = change.text;
5935 var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
5936 var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to .line - from.line;
5937
5938 // Adjust the line structure
5939 if (isWholeLineUpdate(doc, change)) {
5940 // This is a whole-line replace. Treated specially to make
5941 // sure line objects move the way they are supposed to.
5942 for (var i = 0, added = []; i < text.length - 1; ++i)
5943 added.push(new Line(text[i], spansFor(i), estimateHeight));
5944 update(lastLine, lastLine.text, lastSpans);
5945 if (nlines) doc.remove(from.line, nlines);
5946 if (added.length) doc.insert(from.line, added);
5947 } else if (firstLine == lastLine) {
5948 if (text.length == 1) {
5949 update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLin e.text.slice(to.ch), lastSpans);
5950 } else {
5951 for (var added = [], i = 1; i < text.length - 1; ++i)
5952 added.push(new Line(text[i], spansFor(i), estimateHeight));
5953 added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, e stimateHeight));
5954 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0 ));
5955 doc.insert(from.line + 1, added);
5956 }
5957 } else if (text.length == 1) {
5958 update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.te xt.slice(to.ch), spansFor(0));
5959 doc.remove(from.line + 1, nlines);
5960 } else {
5961 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0)) ;
5962 update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
5963 for (var i = 1, added = []; i < text.length - 1; ++i)
5964 added.push(new Line(text[i], spansFor(i), estimateHeight));
5965 if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
5966 doc.insert(from.line + 1, added);
5967 }
5968
5969 signalLater(doc, "change", doc, change);
5970 }
5971
5972 // The document is represented as a BTree consisting of leaves, with
5973 // chunk of lines in them, and branches, with up to ten leaves or
5974 // other branch nodes below them. The top node is always a branch
5975 // node, and is the document object itself (meaning it has
5976 // additional methods and properties).
5977 //
5978 // All nodes have parent links. The tree is used both to go from
5979 // line numbers to line objects, and to go from objects to numbers.
5980 // It also indexes by height, and is used to convert between height
5981 // and line object, and to find the total height of the document.
5982 //
5983 // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
5984
5985 function LeafChunk(lines) {
5986 this.lines = lines;
5987 this.parent = null;
5988 for (var i = 0, height = 0; i < lines.length; ++i) {
5989 lines[i].parent = this;
5990 height += lines[i].height;
5991 }
5992 this.height = height;
5993 }
5994
5995 LeafChunk.prototype = {
5996 chunkSize: function() { return this.lines.length; },
5997 // Remove the n lines at offset 'at'.
5998 removeInner: function(at, n) {
5999 for (var i = at, e = at + n; i < e; ++i) {
6000 var line = this.lines[i];
6001 this.height -= line.height;
6002 cleanUpLine(line);
6003 signalLater(line, "delete");
6004 }
6005 this.lines.splice(at, n);
6006 },
6007 // Helper used to collapse a small branch into a single leaf.
6008 collapse: function(lines) {
6009 lines.push.apply(lines, this.lines);
6010 },
6011 // Insert the given array of lines at offset 'at', count them as
6012 // having the given height.
6013 insertInner: function(at, lines, height) {
6014 this.height += height;
6015 this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice (at));
6016 for (var i = 0; i < lines.length; ++i) lines[i].parent = this;
6017 },
6018 // Used to iterate over a part of the tree.
6019 iterN: function(at, n, op) {
6020 for (var e = at + n; at < e; ++at)
6021 if (op(this.lines[at])) return true;
6022 }
6023 };
6024
6025 function BranchChunk(children) {
6026 this.children = children;
6027 var size = 0, height = 0;
6028 for (var i = 0; i < children.length; ++i) {
6029 var ch = children[i];
6030 size += ch.chunkSize(); height += ch.height;
6031 ch.parent = this;
6032 }
6033 this.size = size;
6034 this.height = height;
6035 this.parent = null;
6036 }
6037
6038 BranchChunk.prototype = {
6039 chunkSize: function() { return this.size; },
6040 removeInner: function(at, n) {
6041 this.size -= n;
6042 for (var i = 0; i < this.children.length; ++i) {
6043 var child = this.children[i], sz = child.chunkSize();
6044 if (at < sz) {
6045 var rm = Math.min(n, sz - at), oldHeight = child.height;
6046 child.removeInner(at, rm);
6047 this.height -= oldHeight - child.height;
6048 if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
6049 if ((n -= rm) == 0) break;
6050 at = 0;
6051 } else at -= sz;
6052 }
6053 // If the result is smaller than 25 lines, ensure that it is a
6054 // single leaf node.
6055 if (this.size - n < 25 &&
6056 (this.children.length > 1 || !(this.children[0] instanceof LeafChunk)) ) {
6057 var lines = [];
6058 this.collapse(lines);
6059 this.children = [new LeafChunk(lines)];
6060 this.children[0].parent = this;
6061 }
6062 },
6063 collapse: function(lines) {
6064 for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(l ines);
6065 },
6066 insertInner: function(at, lines, height) {
6067 this.size += lines.length;
6068 this.height += height;
6069 for (var i = 0; i < this.children.length; ++i) {
6070 var child = this.children[i], sz = child.chunkSize();
6071 if (at <= sz) {
6072 child.insertInner(at, lines, height);
6073 if (child.lines && child.lines.length > 50) {
6074 while (child.lines.length > 50) {
6075 var spilled = child.lines.splice(child.lines.length - 25, 25);
6076 var newleaf = new LeafChunk(spilled);
6077 child.height -= newleaf.height;
6078 this.children.splice(i + 1, 0, newleaf);
6079 newleaf.parent = this;
6080 }
6081 this.maybeSpill();
6082 }
6083 break;
6084 }
6085 at -= sz;
6086 }
6087 },
6088 // When a node has grown, check whether it should be split.
6089 maybeSpill: function() {
6090 if (this.children.length <= 10) return;
6091 var me = this;
6092 do {
6093 var spilled = me.children.splice(me.children.length - 5, 5);
6094 var sibling = new BranchChunk(spilled);
6095 if (!me.parent) { // Become the parent node
6096 var copy = new BranchChunk(me.children);
6097 copy.parent = me;
6098 me.children = [copy, sibling];
6099 me = copy;
6100 } else {
6101 me.size -= sibling.size;
6102 me.height -= sibling.height;
6103 var myIndex = indexOf(me.parent.children, me);
6104 me.parent.children.splice(myIndex + 1, 0, sibling);
6105 }
6106 sibling.parent = me.parent;
6107 } while (me.children.length > 10);
6108 me.parent.maybeSpill();
6109 },
6110 iterN: function(at, n, op) {
6111 for (var i = 0; i < this.children.length; ++i) {
6112 var child = this.children[i], sz = child.chunkSize();
6113 if (at < sz) {
6114 var used = Math.min(n, sz - at);
6115 if (child.iterN(at, used, op)) return true;
6116 if ((n -= used) == 0) break;
6117 at = 0;
6118 } else at -= sz;
6119 }
6120 }
6121 };
6122
6123 var nextDocId = 0;
6124 var Doc = CodeMirror.Doc = function(text, mode, firstLine) {
6125 if (!(this instanceof Doc)) return new Doc(text, mode, firstLine);
6126 if (firstLine == null) firstLine = 0;
6127
6128 BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
6129 this.first = firstLine;
6130 this.scrollTop = this.scrollLeft = 0;
6131 this.cantEdit = false;
6132 this.cleanGeneration = 1;
6133 this.frontier = firstLine;
6134 var start = Pos(firstLine, 0);
6135 this.sel = simpleSelection(start);
6136 this.history = new History(null);
6137 this.id = ++nextDocId;
6138 this.modeOption = mode;
6139
6140 if (typeof text == "string") text = splitLines(text);
6141 updateDoc(this, {from: start, to: start, text: text});
6142 setSelection(this, simpleSelection(start), sel_dontScroll);
6143 };
6144
6145 Doc.prototype = createObj(BranchChunk.prototype, {
6146 constructor: Doc,
6147 // Iterate over the document. Supports two forms -- with only one
6148 // argument, it calls that for each line in the document. With
6149 // three, it iterates over the range given by the first two (with
6150 // the second being non-inclusive).
6151 iter: function(from, to, op) {
6152 if (op) this.iterN(from - this.first, to - from, op);
6153 else this.iterN(this.first, this.first + this.size, from);
6154 },
6155
6156 // Non-public interface for adding and removing lines.
6157 insert: function(at, lines) {
6158 var height = 0;
6159 for (var i = 0; i < lines.length; ++i) height += lines[i].height;
6160 this.insertInner(at - this.first, lines, height);
6161 },
6162 remove: function(at, n) { this.removeInner(at - this.first, n); },
6163
6164 // From here, the methods are part of the public interface. Most
6165 // are also available from CodeMirror (editor) instances.
6166
6167 getValue: function(lineSep) {
6168 var lines = getLines(this, this.first, this.first + this.size);
6169 if (lineSep === false) return lines;
6170 return lines.join(lineSep || "\n");
6171 },
6172 setValue: docMethodOp(function(code) {
6173 var top = Pos(this.first, 0), last = this.first + this.size - 1;
6174 makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length ),
6175 text: splitLines(code), origin: "setValue"}, true);
6176 setSelection(this, simpleSelection(top));
6177 }),
6178 replaceRange: function(code, from, to, origin) {
6179 from = clipPos(this, from);
6180 to = to ? clipPos(this, to) : from;
6181 replaceRange(this, code, from, to, origin);
6182 },
6183 getRange: function(from, to, lineSep) {
6184 var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
6185 if (lineSep === false) return lines;
6186 return lines.join(lineSep || "\n");
6187 },
6188
6189 getLine: function(line) {var l = this.getLineHandle(line); return l && l.tex t;},
6190
6191 getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
6192 getLineNumber: function(line) {return lineNo(line);},
6193
6194 getLineHandleVisualStart: function(line) {
6195 if (typeof line == "number") line = getLine(this, line);
6196 return visualLine(line);
6197 },
6198
6199 lineCount: function() {return this.size;},
6200 firstLine: function() {return this.first;},
6201 lastLine: function() {return this.first + this.size - 1;},
6202
6203 clipPos: function(pos) {return clipPos(this, pos);},
6204
6205 getCursor: function(start) {
6206 var range = this.sel.primary(), pos;
6207 if (start == null || start == "head") pos = range.head;
6208 else if (start == "anchor") pos = range.anchor;
6209 else if (start == "end" || start == "to" || start === false) pos = range.t o();
6210 else pos = range.from();
6211 return pos;
6212 },
6213 listSelections: function() { return this.sel.ranges; },
6214 somethingSelected: function() {return this.sel.somethingSelected();},
6215
6216 setCursor: docMethodOp(function(line, ch, options) {
6217 setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
6218 }),
6219 setSelection: docMethodOp(function(anchor, head, options) {
6220 setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anch or), options);
6221 }),
6222 extendSelection: docMethodOp(function(head, other, options) {
6223 extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
6224 }),
6225 extendSelections: docMethodOp(function(heads, options) {
6226 extendSelections(this, clipPosArray(this, heads, options));
6227 }),
6228 extendSelectionsBy: docMethodOp(function(f, options) {
6229 extendSelections(this, map(this.sel.ranges, f), options);
6230 }),
6231 setSelections: docMethodOp(function(ranges, primary, options) {
6232 if (!ranges.length) return;
6233 for (var i = 0, out = []; i < ranges.length; i++)
6234 out[i] = new Range(clipPos(this, ranges[i].anchor),
6235 clipPos(this, ranges[i].head));
6236 if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIn dex);
6237 setSelection(this, normalizeSelection(out, primary), options);
6238 }),
6239 addSelection: docMethodOp(function(anchor, head, options) {
6240 var ranges = this.sel.ranges.slice(0);
6241 ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor) ));
6242 setSelection(this, normalizeSelection(ranges, ranges.length - 1), options) ;
6243 }),
6244
6245 getSelection: function(lineSep) {
6246 var ranges = this.sel.ranges, lines;
6247 for (var i = 0; i < ranges.length; i++) {
6248 var sel = getBetween(this, ranges[i].from(), ranges[i].to());
6249 lines = lines ? lines.concat(sel) : sel;
6250 }
6251 if (lineSep === false) return lines;
6252 else return lines.join(lineSep || "\n");
6253 },
6254 getSelections: function(lineSep) {
6255 var parts = [], ranges = this.sel.ranges;
6256 for (var i = 0; i < ranges.length; i++) {
6257 var sel = getBetween(this, ranges[i].from(), ranges[i].to());
6258 if (lineSep !== false) sel = sel.join(lineSep || "\n");
6259 parts[i] = sel;
6260 }
6261 return parts;
6262 },
6263 replaceSelection: function(code, collapse, origin) {
6264 var dup = [];
6265 for (var i = 0; i < this.sel.ranges.length; i++)
6266 dup[i] = code;
6267 this.replaceSelections(dup, collapse, origin || "+input");
6268 },
6269 replaceSelections: docMethodOp(function(code, collapse, origin) {
6270 var changes = [], sel = this.sel;
6271 for (var i = 0; i < sel.ranges.length; i++) {
6272 var range = sel.ranges[i];
6273 changes[i] = {from: range.from(), to: range.to(), text: splitLines(code[ i]), origin: origin};
6274 }
6275 var newSel = collapse && collapse != "end" && computeReplacedSel(this, cha nges, collapse);
6276 for (var i = changes.length - 1; i >= 0; i--)
6277 makeChange(this, changes[i]);
6278 if (newSel) setSelectionReplaceHistory(this, newSel);
6279 else if (this.cm) ensureCursorVisible(this.cm);
6280 }),
6281 undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
6282 redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
6283 undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", t rue);}),
6284 redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", t rue);}),
6285
6286 setExtending: function(val) {this.extend = val;},
6287 getExtending: function() {return this.extend;},
6288
6289 historySize: function() {
6290 var hist = this.history, done = 0, undone = 0;
6291 for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++don e;
6292 for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) + +undone;
6293 return {undo: done, redo: undone};
6294 },
6295 clearHistory: function() {this.history = new History(this.history.maxGenerat ion);},
6296
6297 markClean: function() {
6298 this.cleanGeneration = this.changeGeneration(true);
6299 },
6300 changeGeneration: function(forceSplit) {
6301 if (forceSplit)
6302 this.history.lastOp = this.history.lastOrigin = null;
6303 return this.history.generation;
6304 },
6305 isClean: function (gen) {
6306 return this.history.generation == (gen || this.cleanGeneration);
6307 },
6308
6309 getHistory: function() {
6310 return {done: copyHistoryArray(this.history.done),
6311 undone: copyHistoryArray(this.history.undone)};
6312 },
6313 setHistory: function(histData) {
6314 var hist = this.history = new History(this.history.maxGeneration);
6315 hist.done = copyHistoryArray(histData.done.slice(0), null, true);
6316 hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
6317 },
6318
6319 markText: function(from, to, options) {
6320 return markText(this, clipPos(this, from), clipPos(this, to), options, "ra nge");
6321 },
6322 setBookmark: function(pos, options) {
6323 var realOpts = {replacedWith: options && (options.nodeType == null ? optio ns.widget : options),
6324 insertLeft: options && options.insertLeft,
6325 clearWhenEmpty: false, shared: options && options.shared};
6326 pos = clipPos(this, pos);
6327 return markText(this, pos, pos, realOpts, "bookmark");
6328 },
6329 findMarksAt: function(pos) {
6330 pos = clipPos(this, pos);
6331 var markers = [], spans = getLine(this, pos.line).markedSpans;
6332 if (spans) for (var i = 0; i < spans.length; ++i) {
6333 var span = spans[i];
6334 if ((span.from == null || span.from <= pos.ch) &&
6335 (span.to == null || span.to >= pos.ch))
6336 markers.push(span.marker.parent || span.marker);
6337 }
6338 return markers;
6339 },
6340 findMarks: function(from, to, filter) {
6341 from = clipPos(this, from); to = clipPos(this, to);
6342 var found = [], lineNo = from.line;
6343 this.iter(from.line, to.line + 1, function(line) {
6344 var spans = line.markedSpans;
6345 if (spans) for (var i = 0; i < spans.length; i++) {
6346 var span = spans[i];
6347 if (!(lineNo == from.line && from.ch > span.to ||
6348 span.from == null && lineNo != from.line||
6349 lineNo == to.line && span.from > to.ch) &&
6350 (!filter || filter(span.marker)))
6351 found.push(span.marker.parent || span.marker);
6352 }
6353 ++lineNo;
6354 });
6355 return found;
6356 },
6357 getAllMarks: function() {
6358 var markers = [];
6359 this.iter(function(line) {
6360 var sps = line.markedSpans;
6361 if (sps) for (var i = 0; i < sps.length; ++i)
6362 if (sps[i].from != null) markers.push(sps[i].marker);
6363 });
6364 return markers;
6365 },
6366
6367 posFromIndex: function(off) {
6368 var ch, lineNo = this.first;
6369 this.iter(function(line) {
6370 var sz = line.text.length + 1;
6371 if (sz > off) { ch = off; return true; }
6372 off -= sz;
6373 ++lineNo;
6374 });
6375 return clipPos(this, Pos(lineNo, ch));
6376 },
6377 indexFromPos: function (coords) {
6378 coords = clipPos(this, coords);
6379 var index = coords.ch;
6380 if (coords.line < this.first || coords.ch < 0) return 0;
6381 this.iter(this.first, coords.line, function (line) {
6382 index += line.text.length + 1;
6383 });
6384 return index;
6385 },
6386
6387 copy: function(copyHistory) {
6388 var doc = new Doc(getLines(this, this.first, this.first + this.size), this .modeOption, this.first);
6389 doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
6390 doc.sel = this.sel;
6391 doc.extend = false;
6392 if (copyHistory) {
6393 doc.history.undoDepth = this.history.undoDepth;
6394 doc.setHistory(this.getHistory());
6395 }
6396 return doc;
6397 },
6398
6399 linkedDoc: function(options) {
6400 if (!options) options = {};
6401 var from = this.first, to = this.first + this.size;
6402 if (options.from != null && options.from > from) from = options.from;
6403 if (options.to != null && options.to < to) to = options.to;
6404 var copy = new Doc(getLines(this, from, to), options.mode || this.modeOpti on, from);
6405 if (options.sharedHist) copy.history = this.history;
6406 (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.s haredHist});
6407 copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist} ];
6408 copySharedMarkers(copy, findSharedMarkers(this));
6409 return copy;
6410 },
6411 unlinkDoc: function(other) {
6412 if (other instanceof CodeMirror) other = other.doc;
6413 if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
6414 var link = this.linked[i];
6415 if (link.doc != other) continue;
6416 this.linked.splice(i, 1);
6417 other.unlinkDoc(this);
6418 detachSharedMarkers(findSharedMarkers(this));
6419 break;
6420 }
6421 // If the histories were shared, split them again
6422 if (other.history == this.history) {
6423 var splitIds = [other.id];
6424 linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
6425 other.history = new History(null);
6426 other.history.done = copyHistoryArray(this.history.done, splitIds);
6427 other.history.undone = copyHistoryArray(this.history.undone, splitIds);
6428 }
6429 },
6430 iterLinkedDocs: function(f) {linkedDocs(this, f);},
6431
6432 getMode: function() {return this.mode;},
6433 getEditor: function() {return this.cm;}
6434 });
6435
6436 // Public alias.
6437 Doc.prototype.eachLine = Doc.prototype.iter;
6438
6439 // Set up methods on CodeMirror's prototype to redirect to the editor's docume nt.
6440 var dontDelegate = "iter insert remove copy getEditor".split(" ");
6441 for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && inde xOf(dontDelegate, prop) < 0)
6442 CodeMirror.prototype[prop] = (function(method) {
6443 return function() {return method.apply(this.doc, arguments);};
6444 })(Doc.prototype[prop]);
6445
6446 eventMixin(Doc);
6447
6448 // Call f for all linked documents.
6449 function linkedDocs(doc, f, sharedHistOnly) {
6450 function propagate(doc, skip, sharedHist) {
6451 if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
6452 var rel = doc.linked[i];
6453 if (rel.doc == skip) continue;
6454 var shared = sharedHist && rel.sharedHist;
6455 if (sharedHistOnly && !shared) continue;
6456 f(rel.doc, shared);
6457 propagate(rel.doc, doc, shared);
6458 }
6459 }
6460 propagate(doc, null, true);
6461 }
6462
6463 // Attach a document to an editor.
6464 function attachDoc(cm, doc) {
6465 if (doc.cm) throw new Error("This document is already in use.");
6466 cm.doc = doc;
6467 doc.cm = cm;
6468 estimateLineHeights(cm);
6469 loadMode(cm);
6470 if (!cm.options.lineWrapping) findMaxLine(cm);
6471 cm.options.mode = doc.modeOption;
6472 regChange(cm);
6473 }
6474
6475 // LINE UTILITIES
6476
6477 // Find the line object corresponding to the given line number.
6478 function getLine(doc, n) {
6479 n -= doc.first;
6480 if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.f irst) + " in the document.");
6481 for (var chunk = doc; !chunk.lines;) {
6482 for (var i = 0;; ++i) {
6483 var child = chunk.children[i], sz = child.chunkSize();
6484 if (n < sz) { chunk = child; break; }
6485 n -= sz;
6486 }
6487 }
6488 return chunk.lines[n];
6489 }
6490
6491 // Get the part of a document between two positions, as an array of
6492 // strings.
6493 function getBetween(doc, start, end) {
6494 var out = [], n = start.line;
6495 doc.iter(start.line, end.line + 1, function(line) {
6496 var text = line.text;
6497 if (n == end.line) text = text.slice(0, end.ch);
6498 if (n == start.line) text = text.slice(start.ch);
6499 out.push(text);
6500 ++n;
6501 });
6502 return out;
6503 }
6504 // Get the lines between from and to, as array of strings.
6505 function getLines(doc, from, to) {
6506 var out = [];
6507 doc.iter(from, to, function(line) { out.push(line.text); });
6508 return out;
6509 }
6510
6511 // Update the height of a line, propagating the height change
6512 // upwards to parent nodes.
6513 function updateLineHeight(line, height) {
6514 var diff = height - line.height;
6515 if (diff) for (var n = line; n; n = n.parent) n.height += diff;
6516 }
6517
6518 // Given a line object, find its line number by walking up through
6519 // its parent links.
6520 function lineNo(line) {
6521 if (line.parent == null) return null;
6522 var cur = line.parent, no = indexOf(cur.lines, line);
6523 for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
6524 for (var i = 0;; ++i) {
6525 if (chunk.children[i] == cur) break;
6526 no += chunk.children[i].chunkSize();
6527 }
6528 }
6529 return no + cur.first;
6530 }
6531
6532 // Find the line at the given vertical position, using the height
6533 // information in the document tree.
6534 function lineAtHeight(chunk, h) {
6535 var n = chunk.first;
6536 outer: do {
6537 for (var i = 0; i < chunk.children.length; ++i) {
6538 var child = chunk.children[i], ch = child.height;
6539 if (h < ch) { chunk = child; continue outer; }
6540 h -= ch;
6541 n += child.chunkSize();
6542 }
6543 return n;
6544 } while (!chunk.lines);
6545 for (var i = 0; i < chunk.lines.length; ++i) {
6546 var line = chunk.lines[i], lh = line.height;
6547 if (h < lh) break;
6548 h -= lh;
6549 }
6550 return n + i;
6551 }
6552
6553
6554 // Find the height above the given line.
6555 function heightAtLine(lineObj) {
6556 lineObj = visualLine(lineObj);
6557
6558 var h = 0, chunk = lineObj.parent;
6559 for (var i = 0; i < chunk.lines.length; ++i) {
6560 var line = chunk.lines[i];
6561 if (line == lineObj) break;
6562 else h += line.height;
6563 }
6564 for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
6565 for (var i = 0; i < p.children.length; ++i) {
6566 var cur = p.children[i];
6567 if (cur == chunk) break;
6568 else h += cur.height;
6569 }
6570 }
6571 return h;
6572 }
6573
6574 // Get the bidi ordering for the given line (and cache it). Returns
6575 // false for lines that are fully left-to-right, and an array of
6576 // BidiSpan objects otherwise.
6577 function getOrder(line) {
6578 var order = line.order;
6579 if (order == null) order = line.order = bidiOrdering(line.text);
6580 return order;
6581 }
6582
6583 // HISTORY
6584
6585 function History(startGen) {
6586 // Arrays of change events and selections. Doing something adds an
6587 // event to done and clears undo. Undoing moves events from done
6588 // to undone, redoing moves them in the other direction.
6589 this.done = []; this.undone = [];
6590 this.undoDepth = Infinity;
6591 // Used to track when changes can be merged into a single undo
6592 // event
6593 this.lastModTime = this.lastSelTime = 0;
6594 this.lastOp = null;
6595 this.lastOrigin = this.lastSelOrigin = null;
6596 // Used by the isClean() method
6597 this.generation = this.maxGeneration = startGen || 1;
6598 }
6599
6600 // Create a history change event from an updateDoc-style change
6601 // object.
6602 function historyChangeFromChange(doc, change) {
6603 var histChange = {from: copyPos(change.from), to: changeEnd(change), text: g etBetween(doc, change.from, change.to)};
6604 attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
6605 linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from .line, change.to.line + 1);}, true);
6606 return histChange;
6607 }
6608
6609 // Pop all selection events off the end of a history array. Stop at
6610 // a change event.
6611 function clearSelectionEvents(array) {
6612 while (array.length) {
6613 var last = lst(array);
6614 if (last.ranges) array.pop();
6615 else break;
6616 }
6617 }
6618
6619 // Find the top change event in the history. Pop off selection
6620 // events that are in the way.
6621 function lastChangeEvent(hist, force) {
6622 if (force) {
6623 clearSelectionEvents(hist.done);
6624 return lst(hist.done);
6625 } else if (hist.done.length && !lst(hist.done).ranges) {
6626 return lst(hist.done);
6627 } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
6628 hist.done.pop();
6629 return lst(hist.done);
6630 }
6631 }
6632
6633 // Register a change in the history. Merges changes that are within
6634 // a single operation, ore are close together with an origin that
6635 // allows merging (starting with "+") into a single event.
6636 function addChangeToHistory(doc, change, selAfter, opId) {
6637 var hist = doc.history;
6638 hist.undone.length = 0;
6639 var time = +new Date, cur;
6640
6641 if ((hist.lastOp == opId ||
6642 hist.lastOrigin == change.origin && change.origin &&
6643 ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) ||
6644 change.origin.charAt(0) == "*")) &&
6645 (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
6646 // Merge this change into the last event
6647 var last = lst(cur.changes);
6648 if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
6649 // Optimized case for simple insertion -- don't want to add
6650 // new changesets for every character typed
6651 last.to = changeEnd(change);
6652 } else {
6653 // Add new sub-event
6654 cur.changes.push(historyChangeFromChange(doc, change));
6655 }
6656 } else {
6657 // Can not be merged, start a new event.
6658 var before = lst(hist.done);
6659 if (!before || !before.ranges)
6660 pushSelectionToHistory(doc.sel, hist.done);
6661 cur = {changes: [historyChangeFromChange(doc, change)],
6662 generation: hist.generation};
6663 hist.done.push(cur);
6664 while (hist.done.length > hist.undoDepth) {
6665 hist.done.shift();
6666 if (!hist.done[0].ranges) hist.done.shift();
6667 }
6668 }
6669 hist.done.push(selAfter);
6670 hist.generation = ++hist.maxGeneration;
6671 hist.lastModTime = hist.lastSelTime = time;
6672 hist.lastOp = opId;
6673 hist.lastOrigin = hist.lastSelOrigin = change.origin;
6674
6675 if (!last) signal(doc, "historyAdded");
6676 }
6677
6678 function selectionEventCanBeMerged(doc, origin, prev, sel) {
6679 var ch = origin.charAt(0);
6680 return ch == "*" ||
6681 ch == "+" &&
6682 prev.ranges.length == sel.ranges.length &&
6683 prev.somethingSelected() == sel.somethingSelected() &&
6684 new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEven tDelay : 500);
6685 }
6686
6687 // Called whenever the selection changes, sets the new selection as
6688 // the pending selection in the history, and pushes the old pending
6689 // selection into the 'done' array when it was significantly
6690 // different (in number of selected ranges, emptiness, or time).
6691 function addSelectionToHistory(doc, sel, opId, options) {
6692 var hist = doc.history, origin = options && options.origin;
6693
6694 // A new event is started when the previous origin does not match
6695 // the current, or the origins don't allow matching. Origins
6696 // starting with * are always merged, those starting with + are
6697 // merged when similar and close together in time.
6698 if (opId == hist.lastOp ||
6699 (origin && hist.lastSelOrigin == origin &&
6700 (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
6701 selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
6702 hist.done[hist.done.length - 1] = sel;
6703 else
6704 pushSelectionToHistory(sel, hist.done);
6705
6706 hist.lastSelTime = +new Date;
6707 hist.lastSelOrigin = origin;
6708 hist.lastOp = opId;
6709 if (options && options.clearRedo !== false)
6710 clearSelectionEvents(hist.undone);
6711 }
6712
6713 function pushSelectionToHistory(sel, dest) {
6714 var top = lst(dest);
6715 if (!(top && top.ranges && top.equals(sel)))
6716 dest.push(sel);
6717 }
6718
6719 // Used to store marked span information in the history.
6720 function attachLocalSpans(doc, change, from, to) {
6721 var existing = change["spans_" + doc.id], n = 0;
6722 doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), func tion(line) {
6723 if (line.markedSpans)
6724 (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.mark edSpans;
6725 ++n;
6726 });
6727 }
6728
6729 // When un/re-doing restores text containing marked spans, those
6730 // that have been explicitly cleared should not be restored.
6731 function removeClearedSpans(spans) {
6732 if (!spans) return null;
6733 for (var i = 0, out; i < spans.length; ++i) {
6734 if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i) ; }
6735 else if (out) out.push(spans[i]);
6736 }
6737 return !out ? spans : out.length ? out : null;
6738 }
6739
6740 // Retrieve and filter the old marked spans stored in a change event.
6741 function getOldSpans(doc, change) {
6742 var found = change["spans_" + doc.id];
6743 if (!found) return null;
6744 for (var i = 0, nw = []; i < change.text.length; ++i)
6745 nw.push(removeClearedSpans(found[i]));
6746 return nw;
6747 }
6748
6749 // Used both to provide a JSON-safe object in .getHistory, and, when
6750 // detaching a document, to split the history in two
6751 function copyHistoryArray(events, newGroup, instantiateSel) {
6752 for (var i = 0, copy = []; i < events.length; ++i) {
6753 var event = events[i];
6754 if (event.ranges) {
6755 copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : ev ent);
6756 continue;
6757 }
6758 var changes = event.changes, newChanges = [];
6759 copy.push({changes: newChanges});
6760 for (var j = 0; j < changes.length; ++j) {
6761 var change = changes[j], m;
6762 newChanges.push({from: change.from, to: change.to, text: change.text});
6763 if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$ /)) {
6764 if (indexOf(newGroup, Number(m[1])) > -1) {
6765 lst(newChanges)[prop] = change[prop];
6766 delete change[prop];
6767 }
6768 }
6769 }
6770 }
6771 return copy;
6772 }
6773
6774 // Rebasing/resetting history to deal with externally-sourced changes
6775
6776 function rebaseHistSelSingle(pos, from, to, diff) {
6777 if (to < pos.line) {
6778 pos.line += diff;
6779 } else if (from < pos.line) {
6780 pos.line = from;
6781 pos.ch = 0;
6782 }
6783 }
6784
6785 // Tries to rebase an array of history events given a change in the
6786 // document. If the change touches the same lines as the event, the
6787 // event, and everything 'behind' it, is discarded. If the change is
6788 // before the event, the event's positions are updated. Uses a
6789 // copy-on-write scheme for the positions, to avoid having to
6790 // reallocate them all on every rebase, but also avoid problems with
6791 // shared position objects being unsafely updated.
6792 function rebaseHistArray(array, from, to, diff) {
6793 for (var i = 0; i < array.length; ++i) {
6794 var sub = array[i], ok = true;
6795 if (sub.ranges) {
6796 if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
6797 for (var j = 0; j < sub.ranges.length; j++) {
6798 rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
6799 rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
6800 }
6801 continue;
6802 }
6803 for (var j = 0; j < sub.changes.length; ++j) {
6804 var cur = sub.changes[j];
6805 if (to < cur.from.line) {
6806 cur.from = Pos(cur.from.line + diff, cur.from.ch);
6807 cur.to = Pos(cur.to.line + diff, cur.to.ch);
6808 } else if (from <= cur.to.line) {
6809 ok = false;
6810 break;
6811 }
6812 }
6813 if (!ok) {
6814 array.splice(0, i + 1);
6815 i = 0;
6816 }
6817 }
6818 }
6819
6820 function rebaseHist(hist, change) {
6821 var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
6822 rebaseHistArray(hist.done, from, to, diff);
6823 rebaseHistArray(hist.undone, from, to, diff);
6824 }
6825
6826 // EVENT UTILITIES
6827
6828 // Due to the fact that we still support jurassic IE versions, some
6829 // compatibility wrappers are needed.
6830
6831 var e_preventDefault = CodeMirror.e_preventDefault = function(e) {
6832 if (e.preventDefault) e.preventDefault();
6833 else e.returnValue = false;
6834 };
6835 var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) {
6836 if (e.stopPropagation) e.stopPropagation();
6837 else e.cancelBubble = true;
6838 };
6839 function e_defaultPrevented(e) {
6840 return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == fa lse;
6841 }
6842 var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropa gation(e);};
6843
6844 function e_target(e) {return e.target || e.srcElement;}
6845 function e_button(e) {
6846 var b = e.which;
6847 if (b == null) {
6848 if (e.button & 1) b = 1;
6849 else if (e.button & 2) b = 3;
6850 else if (e.button & 4) b = 2;
6851 }
6852 if (mac && e.ctrlKey && b == 1) b = 3;
6853 return b;
6854 }
6855
6856 // EVENT HANDLING
6857
6858 // Lightweight event framework. on/off also work on DOM nodes,
6859 // registering native DOM handlers.
6860
6861 var on = CodeMirror.on = function(emitter, type, f) {
6862 if (emitter.addEventListener)
6863 emitter.addEventListener(type, f, false);
6864 else if (emitter.attachEvent)
6865 emitter.attachEvent("on" + type, f);
6866 else {
6867 var map = emitter._handlers || (emitter._handlers = {});
6868 var arr = map[type] || (map[type] = []);
6869 arr.push(f);
6870 }
6871 };
6872
6873 var off = CodeMirror.off = function(emitter, type, f) {
6874 if (emitter.removeEventListener)
6875 emitter.removeEventListener(type, f, false);
6876 else if (emitter.detachEvent)
6877 emitter.detachEvent("on" + type, f);
6878 else {
6879 var arr = emitter._handlers && emitter._handlers[type];
6880 if (!arr) return;
6881 for (var i = 0; i < arr.length; ++i)
6882 if (arr[i] == f) { arr.splice(i, 1); break; }
6883 }
6884 };
6885
6886 var signal = CodeMirror.signal = function(emitter, type /*, values...*/) {
6887 var arr = emitter._handlers && emitter._handlers[type];
6888 if (!arr) return;
6889 var args = Array.prototype.slice.call(arguments, 2);
6890 for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
6891 };
6892
6893 // Often, we want to signal events at a point where we are in the
6894 // middle of some work, but don't want the handler to start calling
6895 // other methods on the editor, which might be in an inconsistent
6896 // state or simply not expect any other events to happen.
6897 // signalLater looks whether there are any handlers, and schedules
6898 // them to be executed when the last operation ends, or, if no
6899 // operation is active, when a timeout fires.
6900 var delayedCallbacks, delayedCallbackDepth = 0;
6901 function signalLater(emitter, type /*, values...*/) {
6902 var arr = emitter._handlers && emitter._handlers[type];
6903 if (!arr) return;
6904 var args = Array.prototype.slice.call(arguments, 2);
6905 if (!delayedCallbacks) {
6906 ++delayedCallbackDepth;
6907 delayedCallbacks = [];
6908 setTimeout(fireDelayed, 0);
6909 }
6910 function bnd(f) {return function(){f.apply(null, args);};};
6911 for (var i = 0; i < arr.length; ++i)
6912 delayedCallbacks.push(bnd(arr[i]));
6913 }
6914
6915 function fireDelayed() {
6916 --delayedCallbackDepth;
6917 var delayed = delayedCallbacks;
6918 delayedCallbacks = null;
6919 for (var i = 0; i < delayed.length; ++i) delayed[i]();
6920 }
6921
6922 // The DOM events that CodeMirror handles can be overridden by
6923 // registering a (non-DOM) handler on the editor for the event name,
6924 // and preventDefault-ing the event in that handler.
6925 function signalDOMEvent(cm, e, override) {
6926 signal(cm, override || e.type, cm, e);
6927 return e_defaultPrevented(e) || e.codemirrorIgnore;
6928 }
6929
6930 function signalCursorActivity(cm) {
6931 var arr = cm._handlers && cm._handlers.cursorActivity;
6932 if (!arr) return;
6933 var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandler s = []);
6934 for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1)
6935 set.push(arr[i]);
6936 }
6937
6938 function hasHandler(emitter, type) {
6939 var arr = emitter._handlers && emitter._handlers[type];
6940 return arr && arr.length > 0;
6941 }
6942
6943 // Add on and off methods to a constructor's prototype, to make
6944 // registering events on such objects more convenient.
6945 function eventMixin(ctor) {
6946 ctor.prototype.on = function(type, f) {on(this, type, f);};
6947 ctor.prototype.off = function(type, f) {off(this, type, f);};
6948 }
6949
6950 // MISC UTILITIES
6951
6952 // Number of pixels added to scroller and sizer to hide scrollbar
6953 var scrollerCutOff = 30;
6954
6955 // Returned or thrown by various protocols to signal 'I'm not
6956 // handling this'.
6957 var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}} ;
6958
6959 // Reused option objects for setSelection & friends
6960 var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
6961
6962 function Delayed() {this.id = null;}
6963 Delayed.prototype.set = function(ms, f) {
6964 clearTimeout(this.id);
6965 this.id = setTimeout(f, ms);
6966 };
6967
6968 // Counts the column offset in a string, taking tabs into account.
6969 // Used mostly to find indentation.
6970 var countColumn = CodeMirror.countColumn = function(string, end, tabSize, star tIndex, startValue) {
6971 if (end == null) {
6972 end = string.search(/[^\s\u00a0]/);
6973 if (end == -1) end = string.length;
6974 }
6975 for (var i = startIndex || 0, n = startValue || 0;;) {
6976 var nextTab = string.indexOf("\t", i);
6977 if (nextTab < 0 || nextTab >= end)
6978 return n + (end - i);
6979 n += nextTab - i;
6980 n += tabSize - (n % tabSize);
6981 i = nextTab + 1;
6982 }
6983 };
6984
6985 // The inverse of countColumn -- find the offset that corresponds to
6986 // a particular column.
6987 function findColumn(string, goal, tabSize) {
6988 for (var pos = 0, col = 0;;) {
6989 var nextTab = string.indexOf("\t", pos);
6990 if (nextTab == -1) nextTab = string.length;
6991 var skipped = nextTab - pos;
6992 if (nextTab == string.length || col + skipped >= goal)
6993 return pos + Math.min(skipped, goal - col);
6994 col += nextTab - pos;
6995 col += tabSize - (col % tabSize);
6996 pos = nextTab + 1;
6997 if (col >= goal) return pos;
6998 }
6999 }
7000
7001 var spaceStrs = [""];
7002 function spaceStr(n) {
7003 while (spaceStrs.length <= n)
7004 spaceStrs.push(lst(spaceStrs) + " ");
7005 return spaceStrs[n];
7006 }
7007
7008 function lst(arr) { return arr[arr.length-1]; }
7009
7010 var selectInput = function(node) { node.select(); };
7011 if (ios) // Mobile Safari apparently has a bug where select() is broken.
7012 selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; };
7013 else if (ie) // Suppress mysterious IE10 errors
7014 selectInput = function(node) { try { node.select(); } catch(_e) {} };
7015
7016 function indexOf(array, elt) {
7017 for (var i = 0; i < array.length; ++i)
7018 if (array[i] == elt) return i;
7019 return -1;
7020 }
7021 if ([].indexOf) indexOf = function(array, elt) { return array.indexOf(elt); };
7022 function map(array, f) {
7023 var out = [];
7024 for (var i = 0; i < array.length; i++) out[i] = f(array[i], i);
7025 return out;
7026 }
7027 if ([].map) map = function(array, f) { return array.map(f); };
7028
7029 function createObj(base, props) {
7030 var inst;
7031 if (Object.create) {
7032 inst = Object.create(base);
7033 } else {
7034 var ctor = function() {};
7035 ctor.prototype = base;
7036 inst = new ctor();
7037 }
7038 if (props) copyObj(props, inst);
7039 return inst;
7040 };
7041
7042 function copyObj(obj, target, overwrite) {
7043 if (!target) target = {};
7044 for (var prop in obj)
7045 if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProp erty(prop)))
7046 target[prop] = obj[prop];
7047 return target;
7048 }
7049
7050 function bind(f) {
7051 var args = Array.prototype.slice.call(arguments, 1);
7052 return function(){return f.apply(null, args);};
7053 }
7054
7055 var nonASCIISingleCaseWordChar = /[\u00df\u3040-\u309f\u30a0-\u30ff\u3400-\u4d b5\u4e00-\u9fcc\uac00-\ud7af]/;
7056 var isWordChar = CodeMirror.isWordChar = function(ch) {
7057 return /\w/.test(ch) || ch > "\x80" &&
7058 (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(c h));
7059 };
7060
7061 function isEmpty(obj) {
7062 for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
7063 return true;
7064 }
7065
7066 // Extending unicode characters. A series of a non-extending char +
7067 // any number of extending chars is treated as a single unit as far
7068 // as editing and measuring is concerned. This is not fully correct,
7069 // since some scripts/fonts/browsers also treat other configurations
7070 // of code points as a group.
7071 var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05 c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u 06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u081 9\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u 0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u 0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0 a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b 3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3 e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0c c6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d6 3\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0e b4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0 f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037 \u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086 \u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17b d\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u19 39-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u 1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2- \u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1c e8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\ u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b 3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab 2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe0 0-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
7072 function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChar s.test(ch); }
7073
7074 // DOM UTILITIES
7075
7076 function elt(tag, content, className, style) {
7077 var e = document.createElement(tag);
7078 if (className) e.className = className;
7079 if (style) e.style.cssText = style;
7080 if (typeof content == "string") e.appendChild(document.createTextNode(conten t));
7081 else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(con tent[i]);
7082 return e;
7083 }
7084
7085 var range;
7086 if (document.createRange) range = function(node, start, end) {
7087 var r = document.createRange();
7088 r.setEnd(node, end);
7089 r.setStart(node, start);
7090 return r;
7091 };
7092 else range = function(node, start, end) {
7093 var r = document.body.createTextRange();
7094 r.moveToElementText(node.parentNode);
7095 r.collapse(true);
7096 r.moveEnd("character", end);
7097 r.moveStart("character", start);
7098 return r;
7099 };
7100
7101 function removeChildren(e) {
7102 for (var count = e.childNodes.length; count > 0; --count)
7103 e.removeChild(e.firstChild);
7104 return e;
7105 }
7106
7107 function removeChildrenAndAdd(parent, e) {
7108 return removeChildren(parent).appendChild(e);
7109 }
7110
7111 function contains(parent, child) {
7112 if (parent.contains)
7113 return parent.contains(child);
7114 while (child = child.parentNode)
7115 if (child == parent) return true;
7116 }
7117
7118 function activeElt() { return document.activeElement; }
7119 // Older versions of IE throws unspecified error when touching
7120 // document.activeElement in some cases (during loading, in iframe)
7121 if (ie_upto10) activeElt = function() {
7122 try { return document.activeElement; }
7123 catch(e) { return document.body; }
7124 };
7125
7126 function classTest(cls) { return new RegExp("\\b" + cls + "\\b\\s*"); }
7127 function rmClass(node, cls) {
7128 var test = classTest(cls);
7129 if (test.test(node.className)) node.className = node.className.replace(test, "");
7130 }
7131 function addClass(node, cls) {
7132 if (!classTest(cls).test(node.className)) node.className += " " + cls;
7133 }
7134 function joinClasses(a, b) {
7135 var as = a.split(" ");
7136 for (var i = 0; i < as.length; i++)
7137 if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i];
7138 return b;
7139 }
7140
7141 // FEATURE DETECTION
7142
7143 // Detect drag-and-drop
7144 var dragAndDrop = function() {
7145 // There is *some* kind of drag-and-drop support in IE6-8, but I
7146 // couldn't get it to work yet.
7147 if (ie_upto8) return false;
7148 var div = elt('div');
7149 return "draggable" in div || "dragDrop" in div;
7150 }();
7151
7152 var knownScrollbarWidth;
7153 function scrollbarWidth(measure) {
7154 if (knownScrollbarWidth != null) return knownScrollbarWidth;
7155 var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: sc roll");
7156 removeChildrenAndAdd(measure, test);
7157 if (test.offsetWidth)
7158 knownScrollbarWidth = test.offsetHeight - test.clientHeight;
7159 return knownScrollbarWidth || 0;
7160 }
7161
7162 var zwspSupported;
7163 function zeroWidthElement(measure) {
7164 if (zwspSupported == null) {
7165 var test = elt("span", "\u200b");
7166 removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode(" x")]));
7167 if (measure.firstChild.offsetHeight != 0)
7168 zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_up to7;
7169 }
7170 if (zwspSupported) return elt("span", "\u200b");
7171 else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
7172 }
7173
7174 // Feature-detect IE's crummy client rect reporting for bidi text
7175 var badBidiRects;
7176 function hasBadBidiRects(measure) {
7177 if (badBidiRects != null) return badBidiRects;
7178 var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA")) ;
7179 var r0 = range(txt, 0, 1).getBoundingClientRect();
7180 if (r0.left == r0.right) return false;
7181 var r1 = range(txt, 1, 2).getBoundingClientRect();
7182 return badBidiRects = (r1.right - r0.right < 3);
7183 }
7184
7185 // See if "".split is the broken IE version, if so, provide an
7186 // alternative way to split lines.
7187 var splitLines = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? fun ction(string) {
7188 var pos = 0, result = [], l = string.length;
7189 while (pos <= l) {
7190 var nl = string.indexOf("\n", pos);
7191 if (nl == -1) nl = string.length;
7192 var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
7193 var rt = line.indexOf("\r");
7194 if (rt != -1) {
7195 result.push(line.slice(0, rt));
7196 pos += rt + 1;
7197 } else {
7198 result.push(line);
7199 pos = nl + 1;
7200 }
7201 }
7202 return result;
7203 } : function(string){return string.split(/\r\n?|\n/);};
7204
7205 var hasSelection = window.getSelection ? function(te) {
7206 try { return te.selectionStart != te.selectionEnd; }
7207 catch(e) { return false; }
7208 } : function(te) {
7209 try {var range = te.ownerDocument.selection.createRange();}
7210 catch(e) {}
7211 if (!range || range.parentElement() != te) return false;
7212 return range.compareEndPoints("StartToEnd", range) != 0;
7213 };
7214
7215 var hasCopyEvent = (function() {
7216 var e = elt("div");
7217 if ("oncopy" in e) return true;
7218 e.setAttribute("oncopy", "return;");
7219 return typeof e.oncopy == "function";
7220 })();
7221
7222 // KEY NAMES
7223
7224 var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift" , 17: "Ctrl", 18: "Alt",
7225 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "Page Up", 34: "PageDown", 35: "End",
7226 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
7227 46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod ", 107: "=", 109: "-", 127: "Delete",
7228 173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 19 1: "/", 192: "`", 219: "[", 220: "\\",
7229 221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
7230 63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown ", 63302: "Insert"};
7231 CodeMirror.keyNames = keyNames;
7232 (function() {
7233 // Number keys
7234 for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i) ;
7235 // Alphabetic keys
7236 for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
7237 // Function keys
7238 for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
7239 })();
7240
7241 // BIDI HELPERS
7242
7243 function iterateBidiSections(order, from, to, f) {
7244 if (!order) return f(from, to, "ltr");
7245 var found = false;
7246 for (var i = 0; i < order.length; ++i) {
7247 var part = order[i];
7248 if (part.from < to && part.to > from || from == to && part.to == from) {
7249 f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "r tl" : "ltr");
7250 found = true;
7251 }
7252 }
7253 if (!found) f(from, to, "ltr");
7254 }
7255
7256 function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
7257 function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
7258
7259 function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft( order[0]) : 0; }
7260 function lineRight(line) {
7261 var order = getOrder(line);
7262 if (!order) return line.text.length;
7263 return bidiRight(lst(order));
7264 }
7265
7266 function lineStart(cm, lineN) {
7267 var line = getLine(cm.doc, lineN);
7268 var visual = visualLine(line);
7269 if (visual != line) lineN = lineNo(visual);
7270 var order = getOrder(visual);
7271 var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visu al);
7272 return Pos(lineN, ch);
7273 }
7274 function lineEnd(cm, lineN) {
7275 var merged, line = getLine(cm.doc, lineN);
7276 while (merged = collapsedSpanAtEnd(line)) {
7277 line = merged.find(1, true).line;
7278 lineN = null;
7279 }
7280 var order = getOrder(line);
7281 var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : l ineRight(line);
7282 return Pos(lineN == null ? lineNo(line) : lineN, ch);
7283 }
7284
7285 function compareBidiLevel(order, a, b) {
7286 var linedir = order[0].level;
7287 if (a == linedir) return true;
7288 if (b == linedir) return false;
7289 return a < b;
7290 }
7291 var bidiOther;
7292 function getBidiPartAt(order, pos) {
7293 bidiOther = null;
7294 for (var i = 0, found; i < order.length; ++i) {
7295 var cur = order[i];
7296 if (cur.from < pos && cur.to > pos) return i;
7297 if ((cur.from == pos || cur.to == pos)) {
7298 if (found == null) {
7299 found = i;
7300 } else if (compareBidiLevel(order, cur.level, order[found].level)) {
7301 if (cur.from != cur.to) bidiOther = found;
7302 return i;
7303 } else {
7304 if (cur.from != cur.to) bidiOther = i;
7305 return found;
7306 }
7307 }
7308 }
7309 return found;
7310 }
7311
7312 function moveInLine(line, pos, dir, byUnit) {
7313 if (!byUnit) return pos + dir;
7314 do pos += dir;
7315 while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
7316 return pos;
7317 }
7318
7319 // This is needed in order to move 'visually' through bi-directional
7320 // text -- i.e., pressing left should make the cursor go left, even
7321 // when in RTL text. The tricky part is the 'jumps', where RTL and
7322 // LTR text touch each other. This often requires the cursor offset
7323 // to move more than one unit, in order to visually move one unit.
7324 function moveVisually(line, start, dir, byUnit) {
7325 var bidi = getOrder(line);
7326 if (!bidi) return moveLogically(line, start, dir, byUnit);
7327 var pos = getBidiPartAt(bidi, start), part = bidi[pos];
7328 var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
7329
7330 for (;;) {
7331 if (target > part.from && target < part.to) return target;
7332 if (target == part.from || target == part.to) {
7333 if (getBidiPartAt(bidi, target) == pos) return target;
7334 part = bidi[pos += dir];
7335 return (dir > 0) == part.level % 2 ? part.to : part.from;
7336 } else {
7337 part = bidi[pos += dir];
7338 if (!part) return null;
7339 if ((dir > 0) == part.level % 2)
7340 target = moveInLine(line, part.to, -1, byUnit);
7341 else
7342 target = moveInLine(line, part.from, 1, byUnit);
7343 }
7344 }
7345 }
7346
7347 function moveLogically(line, start, dir, byUnit) {
7348 var target = start + dir;
7349 if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
7350 return target < 0 || target > line.text.length ? null : target;
7351 }
7352
7353 // Bidirectional ordering algorithm
7354 // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
7355 // that this (partially) implements.
7356
7357 // One-char codes used for character types:
7358 // L (L): Left-to-Right
7359 // R (R): Right-to-Left
7360 // r (AL): Right-to-Left Arabic
7361 // 1 (EN): European Number
7362 // + (ES): European Number Separator
7363 // % (ET): European Number Terminator
7364 // n (AN): Arabic Number
7365 // , (CS): Common Number Separator
7366 // m (NSM): Non-Spacing Mark
7367 // b (BN): Boundary Neutral
7368 // s (B): Paragraph Separator
7369 // t (S): Segment Separator
7370 // w (WS): Whitespace
7371 // N (ON): Other Neutrals
7372
7373 // Returns null if characters are ordered as they appear
7374 // (left-to-right), or an array of sections ({from, to, level}
7375 // objects) in the order in which they occur visually.
7376 var bidiOrdering = (function() {
7377 // Character types for codepoints 0 to 0xff
7378 var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NN NNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbb bbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLL LLLLLLLLLLLLLLLLLLLLLLLLLLLN";
7379 // Character types for codepoints 0x600 to 0x6ff
7380 var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmm mmmmmmmmmmmmmmmmNmmmm";
7381 function charType(code) {
7382 if (code <= 0xf7) return lowTypes.charAt(code);
7383 else if (0x590 <= code && code <= 0x5f4) return "R";
7384 else if (0x600 <= code && code <= 0x6ed) return arabicTypes.charAt(code - 0x600);
7385 else if (0x6ee <= code && code <= 0x8ac) return "r";
7386 else if (0x2000 <= code && code <= 0x200b) return "w";
7387 else if (code == 0x200c) return "b";
7388 else return "L";
7389 }
7390
7391 var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
7392 var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, count sAsNum = /[1n]/;
7393 // Browsers seem to always treat the boundaries of block elements as being L .
7394 var outerType = "L";
7395
7396 function BidiSpan(level, from, to) {
7397 this.level = level;
7398 this.from = from; this.to = to;
7399 }
7400
7401 return function(str) {
7402 if (!bidiRE.test(str)) return false;
7403 var len = str.length, types = [];
7404 for (var i = 0, type; i < len; ++i)
7405 types.push(type = charType(str.charCodeAt(i)));
7406
7407 // W1. Examine each non-spacing mark (NSM) in the level run, and
7408 // change the type of the NSM to the type of the previous
7409 // character. If the NSM is at the start of the level run, it will
7410 // get the type of sor.
7411 for (var i = 0, prev = outerType; i < len; ++i) {
7412 var type = types[i];
7413 if (type == "m") types[i] = prev;
7414 else prev = type;
7415 }
7416
7417 // W2. Search backwards from each instance of a European number
7418 // until the first strong type (R, L, AL, or sor) is found. If an
7419 // AL is found, change the type of the European number to Arabic
7420 // number.
7421 // W3. Change all ALs to R.
7422 for (var i = 0, cur = outerType; i < len; ++i) {
7423 var type = types[i];
7424 if (type == "1" && cur == "r") types[i] = "n";
7425 else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
7426 }
7427
7428 // W4. A single European separator between two European numbers
7429 // changes to a European number. A single common separator between
7430 // two numbers of the same type changes to that type.
7431 for (var i = 1, prev = types[0]; i < len - 1; ++i) {
7432 var type = types[i];
7433 if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
7434 else if (type == "," && prev == types[i+1] &&
7435 (prev == "1" || prev == "n")) types[i] = prev;
7436 prev = type;
7437 }
7438
7439 // W5. A sequence of European terminators adjacent to European
7440 // numbers changes to all European numbers.
7441 // W6. Otherwise, separators and terminators change to Other
7442 // Neutral.
7443 for (var i = 0; i < len; ++i) {
7444 var type = types[i];
7445 if (type == ",") types[i] = "N";
7446 else if (type == "%") {
7447 for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
7448 var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
7449 for (var j = i; j < end; ++j) types[j] = replace;
7450 i = end - 1;
7451 }
7452 }
7453
7454 // W7. Search backwards from each instance of a European number
7455 // until the first strong type (R, L, or sor) is found. If an L is
7456 // found, then change the type of the European number to L.
7457 for (var i = 0, cur = outerType; i < len; ++i) {
7458 var type = types[i];
7459 if (cur == "L" && type == "1") types[i] = "L";
7460 else if (isStrong.test(type)) cur = type;
7461 }
7462
7463 // N1. A sequence of neutrals takes the direction of the
7464 // surrounding strong text if the text on both sides has the same
7465 // direction. European and Arabic numbers act as if they were R in
7466 // terms of their influence on neutrals. Start-of-level-run (sor)
7467 // and end-of-level-run (eor) are used at level run boundaries.
7468 // N2. Any remaining neutrals take the embedding direction.
7469 for (var i = 0; i < len; ++i) {
7470 if (isNeutral.test(types[i])) {
7471 for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
7472 var before = (i ? types[i-1] : outerType) == "L";
7473 var after = (end < len ? types[end] : outerType) == "L";
7474 var replace = before || after ? "L" : "R";
7475 for (var j = i; j < end; ++j) types[j] = replace;
7476 i = end - 1;
7477 }
7478 }
7479
7480 // Here we depart from the documented algorithm, in order to avoid
7481 // building up an actual levels array. Since there are only three
7482 // levels (0, 1, 2) in an implementation that doesn't take
7483 // explicit embedding into account, we can build up the order on
7484 // the fly, without following the level-based algorithm.
7485 var order = [], m;
7486 for (var i = 0; i < len;) {
7487 if (countsAsLeft.test(types[i])) {
7488 var start = i;
7489 for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
7490 order.push(new BidiSpan(0, start, i));
7491 } else {
7492 var pos = i, at = order.length;
7493 for (++i; i < len && types[i] != "L"; ++i) {}
7494 for (var j = pos; j < i;) {
7495 if (countsAsNum.test(types[j])) {
7496 if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j));
7497 var nstart = j;
7498 for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
7499 order.splice(at, 0, new BidiSpan(2, nstart, j));
7500 pos = j;
7501 } else ++j;
7502 }
7503 if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i));
7504 }
7505 }
7506 if (order[0].level == 1 && (m = str.match(/^\s+/))) {
7507 order[0].from = m[0].length;
7508 order.unshift(new BidiSpan(0, 0, m[0].length));
7509 }
7510 if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
7511 lst(order).to -= m[0].length;
7512 order.push(new BidiSpan(0, len - m[0].length, len));
7513 }
7514 if (order[0].level != lst(order).level)
7515 order.push(new BidiSpan(order[0].level, len, len));
7516
7517 return order;
7518 };
7519 })();
7520
7521 // THE END
7522
7523 CodeMirror.version = "4.1.0";
7524
7525 return CodeMirror;
7526 });
OLDNEW
« no previous file with comments | « experimental/webtry/res/js/cm/clike.js ('k') | experimental/webtry/res/js/polyfill.js » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698