From b89a7ee8b956c96a1dcee995ea840feddc5d4b27 Mon Sep 17 00:00:00 2001 From: Pierre Frisch Date: Thu, 22 Dec 2011 07:25:50 -0800 Subject: First commit of Ninja to ninja-internal Signed-off-by: Valerio Virgillito --- js/codemirror/lib/codemirror.css | 67 ++ js/codemirror/lib/codemirror.js | 2144 ++++++++++++++++++++++++++++++++++++++ js/codemirror/lib/overlay.js | 51 + js/codemirror/lib/runmode.js | 27 + 4 files changed, 2289 insertions(+) create mode 100644 js/codemirror/lib/codemirror.css create mode 100644 js/codemirror/lib/codemirror.js create mode 100644 js/codemirror/lib/overlay.js create mode 100644 js/codemirror/lib/runmode.js (limited to 'js/codemirror/lib') diff --git a/js/codemirror/lib/codemirror.css b/js/codemirror/lib/codemirror.css new file mode 100644 index 00000000..d93e72d7 --- /dev/null +++ b/js/codemirror/lib/codemirror.css @@ -0,0 +1,67 @@ +.CodeMirror { + line-height: 1em; + font-family: monospace; +} + +.CodeMirror-scroll { + overflow: auto; + height: 300px; + /* This is needed to prevent an IE[67] bug where the scrolled content + is visible outside of the scrolling box. */ + position: relative; +} + +.CodeMirror-gutter { + position: absolute; left: 0; top: 0; + background-color: #f7f7f7; + border-right: 1px solid #eee; + min-width: 2em; + height: 100%; +} +.CodeMirror-gutter-text { + color: #aaa; + text-align: right; + padding: .4em .2em .4em .4em; +} +.CodeMirror-lines { + padding: .4em; +} + +.CodeMirror pre { + -moz-border-radius: 0; + -webkit-border-radius: 0; + -o-border-radius: 0; + border-radius: 0; + border-width: 0; margin: 0; padding: 0; background: transparent; + font-family: inherit; + font-size: inherit; + padding: 0; margin: 0; + white-space: pre; + word-wrap: normal; +} + +.CodeMirror textarea { + font-family: inherit !important; + font-size: inherit !important; +} + +.CodeMirror-cursor { + z-index: 10; + position: absolute; + visibility: hidden; + border-left: 1px solid black !important; +} +.CodeMirror-focused .CodeMirror-cursor { + visibility: visible; +} + +span.CodeMirror-selected { + background: #ccc !important; + color: HighlightText !important; +} +.CodeMirror-focused span.CodeMirror-selected { + background: Highlight !important; +} + +.CodeMirror-matchingbracket {color: #0f0 !important;} +.CodeMirror-nonmatchingbracket {color: #f22 !important;} diff --git a/js/codemirror/lib/codemirror.js b/js/codemirror/lib/codemirror.js new file mode 100644 index 00000000..27bec72f --- /dev/null +++ b/js/codemirror/lib/codemirror.js @@ -0,0 +1,2144 @@ +// All functions that need access to the editor's state live inside +// the CodeMirror function. Below that, at the bottom of the file, +// some utilities are defined. + +// CodeMirror is the only global var we claim +var CodeMirror = (function() { + // This is the function that produces an editor instance. It's + // closure is used to store the editor state. + function CodeMirror(place, givenOptions) { + // Determine effective options based on given values and defaults. + var options = {}, defaults = CodeMirror.defaults; + for (var opt in defaults) + if (defaults.hasOwnProperty(opt)) + options[opt] = (givenOptions && givenOptions.hasOwnProperty(opt) ? givenOptions : defaults)[opt]; + + var targetDocument = options["document"]; + // The element in which the editor lives. + var wrapper = targetDocument.createElement("div"); + wrapper.className = "CodeMirror"; + // This mess creates the base DOM structure for the editor. + wrapper.innerHTML = + '
' + // Wraps and hides input textarea + '
' + + '
' + + '
' + // Set to the height of the text, causes scrolling + '
' + + '
' + // Moved around its parent to cover visible view + '
' + + // Provides positioning relative to (visible) text origin + '
' + + '
 
' + // Absolutely positioned blinky cursor + '
' + // This DIV contains the actual code + '
'; + if (place.appendChild) place.appendChild(wrapper); else place(wrapper); + // I've never seen more elegant code in my life. + var inputDiv = wrapper.firstChild, input = inputDiv.firstChild, + scroller = wrapper.lastChild, code = scroller.firstChild, + measure = code.firstChild, mover = measure.nextSibling, + gutter = mover.firstChild, gutterText = gutter.firstChild, + lineSpace = gutter.nextSibling.firstChild, + cursor = lineSpace.firstChild, lineDiv = cursor.nextSibling; + if (options.tabindex != null) input.tabindex = options.tabindex; + if (!options.gutter && !options.lineNumbers) gutter.style.display = "none"; + + // Delayed object wrap timeouts, making sure only one is active. blinker holds an interval. + var poll = new Delayed(), highlight = new Delayed(), blinker; + + // mode holds a mode API object. lines an array of Line objects + // (see Line constructor), work an array of lines that should be + // parsed, and history the undo history (instance of History + // constructor). + var mode, lines = [new Line("")], work, history = new History(), focused; + loadMode(); + // The selection. These are always maintained to point at valid + // positions. Inverted is used to remember that the user is + // selecting bottom-to-top. + var sel = {from: {line: 0, ch: 0}, to: {line: 0, ch: 0}, inverted: false}; + // Selection-related flags. shiftSelecting obviously tracks + // whether the user is holding shift. reducedSelection is a hack + // to get around the fact that we can't create inverted + // selections. See below. + var shiftSelecting, reducedSelection, lastDoubleClick; + // Variables used by startOperation/endOperation to track what + // happened during the operation. + var updateInput, changes, textChanged, selectionChanged, leaveInputAlone; + // Current visible range (may be bigger than the view window). + var showingFrom = 0, showingTo = 0, lastHeight = 0, curKeyId = null; + // editing will hold an object describing the things we put in the + // textarea, to help figure out whether something changed. + // bracketHighlighted is used to remember that a backet has been + // marked. + var editing, bracketHighlighted; + // Tracks the maximum line length so that the horizontal scrollbar + // can be kept static when scrolling. + var maxLine = "", maxWidth; + + // Initialize the content. + operation(function(){setValue(options.value || ""); updateInput = false;})(); + + // Register our event handlers. + connect(scroller, "mousedown", operation(onMouseDown)); + // Gecko browsers fire contextmenu *after* opening the menu, at + // which point we can't mess with it anymore. Context menu is + // handled in onMouseDown for Gecko. + if (!gecko) connect(scroller, "contextmenu", onContextMenu); + connect(code, "dblclick", operation(onDblClick)); + connect(scroller, "scroll", function() {updateDisplay([]); if (options.onScroll) options.onScroll(instance);}); + connect(window, "resize", function() {updateDisplay(true);}); + connect(input, "keyup", operation(onKeyUp)); + connect(input, "keydown", operation(onKeyDown)); + connect(input, "keypress", operation(onKeyPress)); + connect(input, "focus", onFocus); + connect(input, "blur", onBlur); + + connect(scroller, "dragenter", e_stop); + connect(scroller, "dragover", e_stop); + connect(scroller, "drop", operation(onDrop)); + connect(scroller, "paste", function(){focusInput(); fastPoll();}); + connect(input, "paste", function(){fastPoll();}); + connect(input, "cut", function(){fastPoll();}); + + // IE throws unspecified error in certain cases, when + // trying to access activeElement before onload + var hasFocus; try { hasFocus = (targetDocument.activeElement == input); } catch(e) { } + if (hasFocus) setTimeout(onFocus, 20); + else onBlur(); + + function isLine(l) {return l >= 0 && l < lines.length;} + // The instance object that we'll return. Mostly calls out to + // local functions in the CodeMirror function. Some do some extra + // range checking and/or clipping. operation is used to wrap the + // call so that changes it makes are tracked, and the display is + // updated afterwards. + var instance = { + getValue: getValue, + setValue: operation(setValue), + getSelection: getSelection, + replaceSelection: operation(replaceSelection), + focus: function(){focusInput(); onFocus(); fastPoll();}, + setOption: function(option, value) { + options[option] = value; + if (option == "lineNumbers" || option == "gutter") gutterChanged(); + else if (option == "mode" || option == "indentUnit") loadMode(); + else if (option == "readOnly" && value == "nocursor") input.blur(); + else if (option == "theme") scroller.className = scroller.className.replace(/cm-s-\w+/, "cm-s-" + value); + }, + getOption: function(option) {return options[option];}, + undo: operation(undo), + redo: operation(redo), + indentLine: operation(function(n) {if (isLine(n)) indentLine(n, "smart");}), + historySize: function() {return {undo: history.done.length, redo: history.undone.length};}, + matchBrackets: operation(function(){matchBrackets(true);}), + getTokenAt: function(pos) { + pos = clipPos(pos); + return lines[pos.line].getTokenAt(mode, getStateBefore(pos.line), pos.ch); + }, + getStateAfter: function(line) { + line = clipLine(line == null ? lines.length - 1: line); + return getStateBefore(line + 1); + }, + cursorCoords: function(start){ + if (start == null) start = sel.inverted; + return pageCoords(start ? sel.from : sel.to); + }, + charCoords: function(pos){return pageCoords(clipPos(pos));}, + coordsChar: function(coords) { + var off = eltOffset(lineSpace); + var line = clipLine(Math.min(lines.length - 1, showingFrom + Math.floor((coords.y - off.top) / lineHeight()))); + return clipPos({line: line, ch: charFromX(clipLine(line), coords.x - off.left)}); + }, + getSearchCursor: function(query, pos, caseFold) {return new SearchCursor(query, pos, caseFold);}, + markText: operation(function(a, b, c){return operation(markText(a, b, c));}), + setMarker: addGutterMarker, + clearMarker: removeGutterMarker, + setLineClass: operation(setLineClass), + lineInfo: lineInfo, + addWidget: function(pos, node, scroll, where) { + pos = localCoords(clipPos(pos)); + var top = pos.yBot, left = pos.x; + node.style.position = "absolute"; + code.appendChild(node); + node.style.left = left + "px"; + if (where == "over") top = pos.y; + else if (where == "near") { + var vspace = Math.max(scroller.offsetHeight, lines.length * lineHeight()), + hspace = Math.max(code.clientWidth, lineSpace.clientWidth) - paddingLeft(); + if (pos.yBot + node.offsetHeight > vspace && pos.y > node.offsetHeight) + top = pos.y - node.offsetHeight; + if (left + node.offsetWidth > hspace) + left = hspace - node.offsetWidth; + } + node.style.top = (top + paddingTop()) + "px"; + node.style.left = (left + paddingLeft()) + "px"; + if (scroll) + scrollIntoView(left, top, left + node.offsetWidth, top + node.offsetHeight); + }, + + lineCount: function() {return lines.length;}, + getCursor: function(start) { + if (start == null) start = sel.inverted; + return copyPos(start ? sel.from : sel.to); + }, + somethingSelected: function() {return !posEq(sel.from, sel.to);}, + setCursor: operation(function(line, ch) { + if (ch == null && typeof line.line == "number") setCursor(line.line, line.ch); + else setCursor(line, ch); + }), + setSelection: operation(function(from, to) {setSelection(clipPos(from), clipPos(to || from));}), + getLine: function(line) {if (isLine(line)) return lines[line].text;}, + setLine: operation(function(line, text) { + if (isLine(line)) replaceRange(text, {line: line, ch: 0}, {line: line, ch: lines[line].text.length}); + }), + removeLine: operation(function(line) { + if (isLine(line)) replaceRange("", {line: line, ch: 0}, clipPos({line: line+1, ch: 0})); + }), + replaceRange: operation(replaceRange), + getRange: function(from, to) {return getRange(clipPos(from), clipPos(to));}, + + operation: function(f){return operation(f)();}, + refresh: function(){updateDisplay(true);}, + getInputField: function(){return input;}, + getWrapperElement: function(){return wrapper;}, + getScrollerElement: function(){return scroller;} + }; + + function setValue(code) { + history = null; + var top = {line: 0, ch: 0}; + updateLines(top, {line: lines.length - 1, ch: lines[lines.length-1].text.length}, + splitLines(code), top, top); + history = new History(); + } + function getValue(code) { + var text = []; + for (var i = 0, l = lines.length; i < l; ++i) + text.push(lines[i].text); + return text.join("\n"); + } + + function onMouseDown(e) { + // Check whether this is a click in a widget + for (var n = e_target(e); n != wrapper; n = n.parentNode) + if (n.parentNode == code && n != mover) return; + var ld = lastDoubleClick; lastDoubleClick = null; + // First, see if this is a click in the gutter + for (var n = e_target(e); n != wrapper; n = n.parentNode) + if (n.parentNode == gutterText) { + if (options.onGutterClick) + options.onGutterClick(instance, indexOf(gutterText.childNodes, n) + showingFrom); + return e_preventDefault(e); + } + + var start = posFromMouse(e); + + switch (e_button(e)) { + case 3: + if (gecko && !mac) onContextMenu(e); + return; + case 2: + if (start) setCursor(start.line, start.ch, true); + return; + } + // For button 1, if it was clicked inside the editor + // (posFromMouse returning non-null), we have to adjust the + // selection. + if (!start) {if (e_target(e) == scroller) e_preventDefault(e); return;} + + if (!focused) onFocus(); + e_preventDefault(e); + if (ld && +new Date - ld < 400) return selectLine(start.line); + + setCursor(start.line, start.ch, true); + var last = start, going; + // And then we have to see if it's a drag event, in which case + // the dragged-over text must be selected. + function end() { + focusInput(); + updateInput = true; + move(); up(); + } + function extend(e) { + var cur = posFromMouse(e, true); + if (cur && !posEq(cur, last)) { + if (!focused) onFocus(); + last = cur; + setSelectionUser(start, cur); + updateInput = false; + var visible = visibleLines(); + if (cur.line >= visible.to || cur.line < visible.from) + going = setTimeout(operation(function(){extend(e);}), 150); + } + } + + var move = connect(targetDocument, "mousemove", operation(function(e) { + clearTimeout(going); + e_preventDefault(e); + extend(e); + }), true); + var up = connect(targetDocument, "mouseup", operation(function(e) { + clearTimeout(going); + var cur = posFromMouse(e); + if (cur) setSelectionUser(start, cur); + e_preventDefault(e); + end(); + }), true); + } + function onDblClick(e) { + var pos = posFromMouse(e); + if (!pos) return; + selectWordAt(pos); + e_preventDefault(e); + lastDoubleClick = +new Date; + } + function onDrop(e) { + e.preventDefault(); + var pos = posFromMouse(e, true), files = e.dataTransfer.files; + if (!pos || options.readOnly) return; + if (files && files.length && window.FileReader && window.File) { + function loadFile(file, i) { + var reader = new FileReader; + reader.onload = function() { + text[i] = reader.result; + if (++read == n) replaceRange(text.join(""), clipPos(pos), clipPos(pos)); + }; + reader.readAsText(file); + } + var n = files.length, text = Array(n), read = 0; + for (var i = 0; i < n; ++i) loadFile(files[i], i); + } + else { + try { + var text = e.dataTransfer.getData("Text"); + if (text) replaceRange(text, pos, pos); + } + catch(e){} + } + } + function onKeyDown(e) { + if (!focused) onFocus(); + + var code = e.keyCode; + // IE does strange things with escape. + if (ie && code == 27) { e.returnValue = false; } + // Tries to detect ctrl on non-mac, cmd on mac. + var mod = (mac ? e.metaKey : e.ctrlKey) && !e.altKey, anyMod = e.ctrlKey || e.altKey || e.metaKey; + if (code == 16 || e.shiftKey) shiftSelecting = shiftSelecting || (sel.inverted ? sel.to : sel.from); + else shiftSelecting = null; + // First give onKeyEvent option a chance to handle this. + if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return; + + if (code == 33 || code == 34) {scrollPage(code == 34); return e_preventDefault(e);} // page up/down + if (mod && ((code == 36 || code == 35) || // ctrl-home/end + mac && (code == 38 || code == 40))) { // cmd-up/down + scrollEnd(code == 36 || code == 38); return e_preventDefault(e); + } + if (mod && code == 65) {selectAll(); return e_preventDefault(e);} // ctrl-a + if (!options.readOnly) { + if (!anyMod && code == 13) {return;} // enter + if (!anyMod && code == 9 && handleTab(e.shiftKey)) return e_preventDefault(e); // tab + if (mod && code == 90) {undo(); return e_preventDefault(e);} // ctrl-z + if (mod && ((e.shiftKey && code == 90) || code == 89)) {redo(); return e_preventDefault(e);} // ctrl-shift-z, ctrl-y + } + + // Key id to use in the movementKeys map. We also pass it to + // fastPoll in order to 'self learn'. We need this because + // reducedSelection, the hack where we collapse the selection to + // its start when it is inverted and a movement key is pressed + // (and later restore it again), shouldn't be used for + // non-movement keys. + curKeyId = (mod ? "c" : "") + code; + if (sel.inverted && movementKeys.hasOwnProperty(curKeyId)) { + var range = selRange(input); + if (range) { + reducedSelection = {anchor: range.start}; + setSelRange(input, range.start, range.start); + } + } + fastPoll(curKeyId); + } + function onKeyUp(e) { + if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return; + if (reducedSelection) { + reducedSelection = null; + updateInput = true; + } + if (e.keyCode == 16) shiftSelecting = null; + } + function onKeyPress(e) { + if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return; + if (options.electricChars && mode.electricChars) { + var ch = String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode); + if (mode.electricChars.indexOf(ch) > -1) + setTimeout(operation(function() {indentLine(sel.to.line, "smart");}), 50); + } + var code = e.keyCode; + // Re-stop tab and enter. Necessary on some browsers. + if (code == 13) {if (!options.readOnly) handleEnter(); e_preventDefault(e);} + else if (!e.ctrlKey && !e.altKey && !e.metaKey && code == 9 && options.tabMode != "default") e_preventDefault(e); + else fastPoll(curKeyId); + } + + function onFocus() { + if (options.readOnly == "nocursor") return; + if (!focused) { + if (options.onFocus) options.onFocus(instance); + focused = true; + if (wrapper.className.search(/\bCodeMirror-focused\b/) == -1) + wrapper.className += " CodeMirror-focused"; + if (!leaveInputAlone) prepareInput(); + } + slowPoll(); + restartBlink(); + } + function onBlur() { + if (focused) { + if (options.onBlur) options.onBlur(instance); + focused = false; + wrapper.className = wrapper.className.replace(" CodeMirror-focused", ""); + } + clearInterval(blinker); + setTimeout(function() {if (!focused) shiftSelecting = null;}, 150); + } + + // Replace the range from from to to by the strings in newText. + // Afterwards, set the selection to selFrom, selTo. + function updateLines(from, to, newText, selFrom, selTo) { + if (history) { + var old = []; + for (var i = from.line, e = to.line + 1; i < e; ++i) old.push(lines[i].text); + history.addChange(from.line, newText.length, old); + while (history.done.length > options.undoDepth) history.done.shift(); + } + updateLinesNoUndo(from, to, newText, selFrom, selTo); + } + function unredoHelper(from, to) { + var change = from.pop(); + if (change) { + var replaced = [], end = change.start + change.added; + for (var i = change.start; i < end; ++i) replaced.push(lines[i].text); + to.push({start: change.start, added: change.old.length, old: replaced}); + var pos = clipPos({line: change.start + change.old.length - 1, + ch: editEnd(replaced[replaced.length-1], change.old[change.old.length-1])}); + updateLinesNoUndo({line: change.start, ch: 0}, {line: end - 1, ch: lines[end-1].text.length}, change.old, pos, pos); + updateInput = true; + } + } + function undo() {unredoHelper(history.done, history.undone);} + function redo() {unredoHelper(history.undone, history.done);} + + function updateLinesNoUndo(from, to, newText, selFrom, selTo) { + var recomputeMaxLength = false, maxLineLength = maxLine.length; + for (var i = from.line; i <= to.line; ++i) { + if (lines[i].text.length == maxLineLength) {recomputeMaxLength = true; break;} + } + + var nlines = to.line - from.line, firstLine = lines[from.line], lastLine = lines[to.line]; + // First adjust the line structure, taking some care to leave highlighting intact. + if (firstLine == lastLine) { + if (newText.length == 1) + firstLine.replace(from.ch, to.ch, newText[0]); + else { + lastLine = firstLine.split(to.ch, newText[newText.length-1]); + var spliceargs = [from.line + 1, nlines]; + firstLine.replace(from.ch, firstLine.text.length, newText[0]); + for (var i = 1, e = newText.length - 1; i < e; ++i) spliceargs.push(new Line(newText[i])); + spliceargs.push(lastLine); + lines.splice.apply(lines, spliceargs); + } + } + else if (newText.length == 1) { + firstLine.replace(from.ch, firstLine.text.length, newText[0] + lastLine.text.slice(to.ch)); + lines.splice(from.line + 1, nlines); + } + else { + var spliceargs = [from.line + 1, nlines - 1]; + firstLine.replace(from.ch, firstLine.text.length, newText[0]); + lastLine.replace(0, to.ch, newText[newText.length-1]); + for (var i = 1, e = newText.length - 1; i < e; ++i) spliceargs.push(new Line(newText[i])); + lines.splice.apply(lines, spliceargs); + } + + + for (var i = from.line, e = i + newText.length; i < e; ++i) { + var l = lines[i].text; + if (l.length > maxLineLength) { + maxLine = l; maxLineLength = l.length; maxWidth = null; + recomputeMaxLength = false; + } + } + if (recomputeMaxLength) { + maxLineLength = 0; maxLine = ""; maxWidth = null; + for (var i = 0, e = lines.length; i < e; ++i) { + var l = lines[i].text; + if (l.length > maxLineLength) { + maxLineLength = l.length; maxLine = l; + } + } + } + + // Add these lines to the work array, so that they will be + // highlighted. Adjust work lines if lines were added/removed. + var newWork = [], lendiff = newText.length - nlines - 1; + for (var i = 0, l = work.length; i < l; ++i) { + var task = work[i]; + if (task < from.line) newWork.push(task); + else if (task > to.line) newWork.push(task + lendiff); + } + if (newText.length < 5) { + highlightLines(from.line, from.line + newText.length); + newWork.push(from.line + newText.length); + } else { + newWork.push(from.line); + } + work = newWork; + startWorker(100); + // Remember that these lines changed, for updating the display + changes.push({from: from.line, to: to.line + 1, diff: lendiff}); + textChanged = {from: from, to: to, text: newText}; + + // Update the selection + function updateLine(n) {return n <= Math.min(to.line, to.line + lendiff) ? n : n + lendiff;} + setSelection(selFrom, selTo, updateLine(sel.from.line), updateLine(sel.to.line)); + + // Make sure the scroll-size div has the correct height. + code.style.height = (lines.length * lineHeight() + 2 * paddingTop()) + "px"; + } + + function replaceRange(code, from, to) { + from = clipPos(from); + if (!to) to = from; else to = clipPos(to); + code = splitLines(code); + function adjustPos(pos) { + if (posLess(pos, from)) return pos; + if (!posLess(to, pos)) return end; + var line = pos.line + code.length - (to.line - from.line) - 1; + var ch = pos.ch; + if (pos.line == to.line) + ch += code[code.length-1].length - (to.ch - (to.line == from.line ? from.ch : 0)); + return {line: line, ch: ch}; + } + var end; + replaceRange1(code, from, to, function(end1) { + end = end1; + return {from: adjustPos(sel.from), to: adjustPos(sel.to)}; + }); + return end; + } + function replaceSelection(code, collapse) { + replaceRange1(splitLines(code), sel.from, sel.to, function(end) { + if (collapse == "end") return {from: end, to: end}; + else if (collapse == "start") return {from: sel.from, to: sel.from}; + else return {from: sel.from, to: end}; + }); + } + function replaceRange1(code, from, to, computeSel) { + var endch = code.length == 1 ? code[0].length + from.ch : code[code.length-1].length; + var newSel = computeSel({line: from.line + code.length - 1, ch: endch}); + updateLines(from, to, code, newSel.from, newSel.to); + } + + function getRange(from, to) { + var l1 = from.line, l2 = to.line; + if (l1 == l2) return lines[l1].text.slice(from.ch, to.ch); + var code = [lines[l1].text.slice(from.ch)]; + for (var i = l1 + 1; i < l2; ++i) code.push(lines[i].text); + code.push(lines[l2].text.slice(0, to.ch)); + return code.join("\n"); + } + function getSelection() { + return getRange(sel.from, sel.to); + } + + var pollingFast = false; // Ensures slowPoll doesn't cancel fastPoll + function slowPoll() { + if (pollingFast) return; + poll.set(2000, function() { + startOperation(); + readInput(); + if (focused) slowPoll(); + endOperation(); + }); + } + function fastPoll(keyId) { + var missed = false; + pollingFast = true; + function p() { + startOperation(); + var changed = readInput(); + if (changed == "moved" && keyId) movementKeys[keyId] = true; + if (!changed && !missed) {missed = true; poll.set(80, p);} + else {pollingFast = false; slowPoll();} + endOperation(); + } + poll.set(20, p); + } + + // Inspects the textarea, compares its state (content, selection) + // to the data in the editing variable, and updates the editor + // content or cursor if something changed. + function readInput() { + if (leaveInputAlone || !focused) return; + var changed = false, text = input.value, sr = selRange(input); + if (!sr) return false; + var changed = editing.text != text, rs = reducedSelection; + var moved = changed || sr.start != editing.start || sr.end != (rs ? editing.start : editing.end); + if (!moved && !rs) return false; + if (changed) { + shiftSelecting = reducedSelection = null; + if (options.readOnly) {updateInput = true; return "changed";} + } + + // Compute selection start and end based on start/end offsets in textarea + function computeOffset(n, startLine) { + var pos = 0; + for (;;) { + var found = text.indexOf("\n", pos); + if (found == -1 || (text.charAt(found-1) == "\r" ? found - 1 : found) >= n) + return {line: startLine, ch: n - pos}; + ++startLine; + pos = found + 1; + } + } + var from = computeOffset(sr.start, editing.from), + to = computeOffset(sr.end, editing.from); + // Here we have to take the reducedSelection hack into account, + // so that you can, for example, press shift-up at the start of + // your selection and have the right thing happen. + if (rs) { + var head = sr.start == rs.anchor ? to : from; + var tail = shiftSelecting ? sel.to : sr.start == rs.anchor ? from : to; + if (sel.inverted = posLess(head, tail)) { from = head; to = tail; } + else { reducedSelection = null; from = tail; to = head; } + } + + // In some cases (cursor on same line as before), we don't have + // to update the textarea content at all. + if (from.line == to.line && from.line == sel.from.line && from.line == sel.to.line && !shiftSelecting) + updateInput = false; + + // Magic mess to extract precise edited range from the changed + // string. + if (changed) { + var start = 0, end = text.length, len = Math.min(end, editing.text.length); + var c, line = editing.from, nl = -1; + while (start < len && (c = text.charAt(start)) == editing.text.charAt(start)) { + ++start; + if (c == "\n") {line++; nl = start;} + } + var ch = nl > -1 ? start - nl : start, endline = editing.to - 1, edend = editing.text.length; + for (;;) { + c = editing.text.charAt(edend); + if (text.charAt(end) != c) {++end; ++edend; break;} + if (c == "\n") endline--; + if (edend <= start || end <= start) break; + --end; --edend; + } + var nl = editing.text.lastIndexOf("\n", edend - 1), endch = nl == -1 ? edend : edend - nl - 1; + updateLines({line: line, ch: ch}, {line: endline, ch: endch}, splitLines(text.slice(start, end)), from, to); + if (line != endline || from.line != line) updateInput = true; + } + else setSelection(from, to); + + editing.text = text; editing.start = sr.start; editing.end = sr.end; + return changed ? "changed" : moved ? "moved" : false; + } + + // Set the textarea content and selection range to match the + // editor state. + function prepareInput() { + var text = []; + var from = Math.max(0, sel.from.line - 1), to = Math.min(lines.length, sel.to.line + 2); + for (var i = from; i < to; ++i) text.push(lines[i].text); + text = input.value = text.join(lineSep); + var startch = sel.from.ch, endch = sel.to.ch; + for (var i = from; i < sel.from.line; ++i) + startch += lineSep.length + lines[i].text.length; + for (var i = from; i < sel.to.line; ++i) + endch += lineSep.length + lines[i].text.length; + editing = {text: text, from: from, to: to, start: startch, end: endch}; + setSelRange(input, startch, reducedSelection ? startch : endch); + } + function focusInput() { + if (options.readOnly != "nocursor") input.focus(); + } + + function scrollCursorIntoView() { + var cursor = localCoords(sel.inverted ? sel.from : sel.to); + return scrollIntoView(cursor.x, cursor.y, cursor.x, cursor.yBot); + } + function scrollIntoView(x1, y1, x2, y2) { + var pl = paddingLeft(), pt = paddingTop(), lh = lineHeight(); + y1 += pt; y2 += pt; x1 += pl; x2 += pl; + var screen = scroller.clientHeight, screentop = scroller.scrollTop, scrolled = false, result = true; + if (y1 < screentop) {scroller.scrollTop = Math.max(0, y1 - 2*lh); scrolled = true;} + else if (y2 > screentop + screen) {scroller.scrollTop = y2 + lh - screen; scrolled = true;} + + var screenw = scroller.clientWidth, screenleft = scroller.scrollLeft; + if (x1 < screenleft) { + if (x1 < 50) x1 = 0; + scroller.scrollLeft = Math.max(0, x1 - 10); + scrolled = true; + } + else if (x2 > screenw + screenleft) { + scroller.scrollLeft = x2 + 10 - screenw; + scrolled = true; + if (x2 > code.clientWidth) result = false; + } + if (scrolled && options.onScroll) options.onScroll(instance); + return result; + } + + function visibleLines() { + var lh = lineHeight(), top = scroller.scrollTop - paddingTop(); + return {from: Math.min(lines.length, Math.max(0, Math.floor(top / lh))), + to: Math.min(lines.length, Math.ceil((top + scroller.clientHeight) / lh))}; + } + // Uses a set of changes plus the current scroll position to + // determine which DOM updates have to be made, and makes the + // updates. + function updateDisplay(changes) { + if (!scroller.clientWidth) { + showingFrom = showingTo = 0; + return; + } + // First create a range of theoretically intact lines, and punch + // holes in that using the change info. + var intact = changes === true ? [] : [{from: showingFrom, to: showingTo, domStart: 0}]; + for (var i = 0, l = changes.length || 0; i < l; ++i) { + var change = changes[i], intact2 = [], diff = change.diff || 0; + for (var j = 0, l2 = intact.length; j < l2; ++j) { + var range = intact[j]; + if (change.to <= range.from) + intact2.push({from: range.from + diff, to: range.to + diff, domStart: range.domStart}); + else if (range.to <= change.from) + intact2.push(range); + else { + if (change.from > range.from) + intact2.push({from: range.from, to: change.from, domStart: range.domStart}) + if (change.to < range.to) + intact2.push({from: change.to + diff, to: range.to + diff, + domStart: range.domStart + (change.to - range.from)}); + } + } + intact = intact2; + } + + // Then, determine which lines we'd want to see, and which + // updates have to be made to get there. + var visible = visibleLines(); + var from = Math.min(showingFrom, Math.max(visible.from - 3, 0)), + to = Math.min(lines.length, Math.max(showingTo, visible.to + 3)), + updates = [], domPos = 0, domEnd = showingTo - showingFrom, pos = from, changedLines = 0; + + for (var i = 0, l = intact.length; i < l; ++i) { + var range = intact[i]; + if (range.to <= from) continue; + if (range.from >= to) break; + if (range.domStart > domPos || range.from > pos) { + updates.push({from: pos, to: range.from, domSize: range.domStart - domPos, domStart: domPos}); + changedLines += range.from - pos; + } + pos = range.to; + domPos = range.domStart + (range.to - range.from); + } + if (domPos != domEnd || pos != to) { + changedLines += Math.abs(to - pos); + updates.push({from: pos, to: to, domSize: domEnd - domPos, domStart: domPos}); + } + + if (!updates.length) return; + lineDiv.style.display = "none"; + // If more than 30% of the screen needs update, just do a full + // redraw (which is quicker than patching) + if (changedLines > (visible.to - visible.from) * .3) + refreshDisplay(from = Math.max(visible.from - 10, 0), to = Math.min(visible.to + 7, lines.length)); + // Otherwise, only update the stuff that needs updating. + else + patchDisplay(updates); + lineDiv.style.display = ""; + + // Position the mover div to align with the lines it's supposed + // to be showing (which will cover the visible display) + var different = from != showingFrom || to != showingTo || lastHeight != scroller.clientHeight; + showingFrom = from; showingTo = to; + mover.style.top = (from * lineHeight()) + "px"; + if (different) { + lastHeight = scroller.clientHeight; + code.style.height = (lines.length * lineHeight() + 2 * paddingTop()) + "px"; + updateGutter(); + } + + if (maxWidth == null) maxWidth = stringWidth(maxLine); + if (maxWidth > scroller.clientWidth) { + lineSpace.style.width = maxWidth + "px"; + // Needed to prevent odd wrapping/hiding of widgets placed in here. + code.style.width = ""; + code.style.width = scroller.scrollWidth + "px"; + } else { + lineSpace.style.width = code.style.width = ""; + } + + // Since this is all rather error prone, it is honoured with the + // only assertion in the whole file. + if (lineDiv.childNodes.length != showingTo - showingFrom) + throw new Error("BAD PATCH! " + JSON.stringify(updates) + " size=" + (showingTo - showingFrom) + + " nodes=" + lineDiv.childNodes.length); + updateCursor(); + } + + function refreshDisplay(from, to) { + var html = [], start = {line: from, ch: 0}, inSel = posLess(sel.from, start) && !posLess(sel.to, start); + for (var i = from; i < to; ++i) { + var ch1 = null, ch2 = null; + if (inSel) { + ch1 = 0; + if (sel.to.line == i) {inSel = false; ch2 = sel.to.ch;} + } + else if (sel.from.line == i) { + if (sel.to.line == i) {ch1 = sel.from.ch; ch2 = sel.to.ch;} + else {inSel = true; ch1 = sel.from.ch;} + } + html.push(lines[i].getHTML(ch1, ch2, true)); + } + lineDiv.innerHTML = html.join(""); + } + function patchDisplay(updates) { + // Slightly different algorithm for IE (badInnerHTML), since + // there .innerHTML on PRE nodes is dumb, and discards + // whitespace. + var sfrom = sel.from.line, sto = sel.to.line, off = 0, + scratch = badInnerHTML && targetDocument.createElement("div"); + for (var i = 0, e = updates.length; i < e; ++i) { + var rec = updates[i]; + var extra = (rec.to - rec.from) - rec.domSize; + var nodeAfter = lineDiv.childNodes[rec.domStart + rec.domSize + off] || null; + if (badInnerHTML) + for (var j = Math.max(-extra, rec.domSize); j > 0; --j) + lineDiv.removeChild(nodeAfter ? nodeAfter.previousSibling : lineDiv.lastChild); + else if (extra) { + for (var j = Math.max(0, extra); j > 0; --j) + lineDiv.insertBefore(targetDocument.createElement("pre"), nodeAfter); + for (var j = Math.max(0, -extra); j > 0; --j) + lineDiv.removeChild(nodeAfter ? nodeAfter.previousSibling : lineDiv.lastChild); + } + var node = lineDiv.childNodes[rec.domStart + off], inSel = sfrom < rec.from && sto >= rec.from; + for (var j = rec.from; j < rec.to; ++j) { + var ch1 = null, ch2 = null; + if (inSel) { + ch1 = 0; + if (sto == j) {inSel = false; ch2 = sel.to.ch;} + } + else if (sfrom == j) { + if (sto == j) {ch1 = sel.from.ch; ch2 = sel.to.ch;} + else {inSel = true; ch1 = sel.from.ch;} + } + if (badInnerHTML) { + scratch.innerHTML = lines[j].getHTML(ch1, ch2, true); + lineDiv.insertBefore(scratch.firstChild, nodeAfter); + } + else { + node.innerHTML = lines[j].getHTML(ch1, ch2, false); + node.className = lines[j].className || ""; + node = node.nextSibling; + } + } + off += extra; + } + } + + function updateGutter() { + if (!options.gutter && !options.lineNumbers) return; + var hText = mover.offsetHeight, hEditor = scroller.clientHeight; + gutter.style.height = (hText - hEditor < 2 ? hEditor : hText) + "px"; + var html = []; + for (var i = showingFrom; i < Math.max(showingTo, showingFrom + 1); ++i) { + var marker = lines[i].gutterMarker; + var text = options.lineNumbers ? i + options.firstLineNumber : null; + if (marker && marker.text) + text = marker.text.replace("%N%", text != null ? text : ""); + else if (text == null) + text = "\u00a0"; + html.push((marker && marker.style ? '
' : "
"), text, "
");
+      }
+      gutter.style.display = "none";
+      gutterText.innerHTML = html.join("");
+      var minwidth = String(lines.length).length, firstNode = gutterText.firstChild, val = eltText(firstNode), pad = "";
+      while (val.length + pad.length < minwidth) pad += "\u00a0";
+      if (pad) firstNode.insertBefore(targetDocument.createTextNode(pad), firstNode.firstChild);
+      gutter.style.display = "";
+      lineSpace.style.marginLeft = gutter.offsetWidth + "px";
+    }
+    function updateCursor() {
+      var head = sel.inverted ? sel.from : sel.to, lh = lineHeight();
+      var x = charX(head.line, head.ch) + "px", y = (head.line - showingFrom) * lh + "px";
+      inputDiv.style.top = (head.line * lh - scroller.scrollTop) + "px";
+      if (posEq(sel.from, sel.to)) {
+        cursor.style.top = y; cursor.style.left = x;
+        cursor.style.display = "";
+      }
+      else cursor.style.display = "none";
+    }
+
+    function setSelectionUser(from, to) {
+      var sh = shiftSelecting && clipPos(shiftSelecting);
+      if (sh) {
+        if (posLess(sh, from)) from = sh;
+        else if (posLess(to, sh)) to = sh;
+      }
+      setSelection(from, to);
+    }
+    // Update the selection. Last two args are only used by
+    // updateLines, since they have to be expressed in the line
+    // numbers before the update.
+    function setSelection(from, to, oldFrom, oldTo) {
+      if (posEq(sel.from, from) && posEq(sel.to, to)) return;
+      if (posLess(to, from)) {var tmp = to; to = from; from = tmp;}
+
+      if (posEq(from, to)) sel.inverted = false;
+      else if (posEq(from, sel.to)) sel.inverted = false;
+      else if (posEq(to, sel.from)) sel.inverted = true;
+
+      // Some ugly logic used to only mark the lines that actually did
+      // see a change in selection as changed, rather than the whole
+      // selected range.
+      if (oldFrom == null) {oldFrom = sel.from.line; oldTo = sel.to.line;}
+      if (posEq(from, to)) {
+        if (!posEq(sel.from, sel.to))
+          changes.push({from: oldFrom, to: oldTo + 1});
+      }
+      else if (posEq(sel.from, sel.to)) {
+        changes.push({from: from.line, to: to.line + 1});
+      }
+      else {
+        if (!posEq(from, sel.from)) {
+          if (from.line < oldFrom)
+            changes.push({from: from.line, to: Math.min(to.line, oldFrom) + 1});
+          else
+            changes.push({from: oldFrom, to: Math.min(oldTo, from.line) + 1});
+        }
+        if (!posEq(to, sel.to)) {
+          if (to.line < oldTo)
+            changes.push({from: Math.max(oldFrom, from.line), to: oldTo + 1});
+          else
+            changes.push({from: Math.max(from.line, oldTo), to: to.line + 1});
+        }
+      }
+      sel.from = from; sel.to = to;
+      selectionChanged = true;
+    }
+    function setCursor(line, ch, user) {
+      var pos = clipPos({line: line, ch: ch || 0});
+      (user ? setSelectionUser : setSelection)(pos, pos);
+    }
+
+    function clipLine(n) {return Math.max(0, Math.min(n, lines.length-1));}
+    function clipPos(pos) {
+      if (pos.line < 0) return {line: 0, ch: 0};
+      if (pos.line >= lines.length) return {line: lines.length-1, ch: lines[lines.length-1].text.length};
+      var ch = pos.ch, linelen = lines[pos.line].text.length;
+      if (ch == null || ch > linelen) return {line: pos.line, ch: linelen};
+      else if (ch < 0) return {line: pos.line, ch: 0};
+      else return pos;
+    }
+
+    function scrollPage(down) {
+      var linesPerPage = Math.floor(scroller.clientHeight / lineHeight()), head = sel.inverted ? sel.from : sel.to;
+      setCursor(head.line + (Math.max(linesPerPage - 1, 1) * (down ? 1 : -1)), head.ch, true);
+    }
+    function scrollEnd(top) {
+      var pos = top ? {line: 0, ch: 0} : {line: lines.length - 1, ch: lines[lines.length-1].text.length};
+      setSelectionUser(pos, pos);
+    }
+    function selectAll() {
+      var endLine = lines.length - 1;
+      setSelection({line: 0, ch: 0}, {line: endLine, ch: lines[endLine].text.length});
+    }
+    function selectWordAt(pos) {
+      var line = lines[pos.line].text;
+      var start = pos.ch, end = pos.ch;
+      while (start > 0 && /\w/.test(line.charAt(start - 1))) --start;
+      while (end < line.length && /\w/.test(line.charAt(end))) ++end;
+      setSelectionUser({line: pos.line, ch: start}, {line: pos.line, ch: end});
+    }
+    function selectLine(line) {
+      setSelectionUser({line: line, ch: 0}, {line: line, ch: lines[line].text.length});
+    }
+    function handleEnter() {
+      replaceSelection("\n", "end");
+      if (options.enterMode != "flat")
+        indentLine(sel.from.line, options.enterMode == "keep" ? "prev" : "smart");
+    }
+    function handleTab(shift) {
+      function indentSelected(mode) {
+        if (posEq(sel.from, sel.to)) return indentLine(sel.from.line, mode);
+        var e = sel.to.line - (sel.to.ch ? 0 : 1);
+        for (var i = sel.from.line; i <= e; ++i) indentLine(i, mode);
+      }
+      shiftSelecting = null;
+      switch (options.tabMode) {
+      case "default":
+        return false;
+      case "indent":
+        indentSelected("smart");
+        break;
+      case "classic":
+        if (posEq(sel.from, sel.to)) {
+          if (shift) indentLine(sel.from.line, "smart");
+          else replaceSelection("\t", "end");
+          break;
+        }
+      case "shift":
+        indentSelected(shift ? "subtract" : "add");
+        break;
+      }
+      return true;
+    }
+
+    function indentLine(n, how) {
+      if (how == "smart") {
+        if (!mode.indent) how = "prev";
+        else var state = getStateBefore(n);
+      }
+
+      var line = lines[n], curSpace = line.indentation(), curSpaceString = line.text.match(/^\s*/)[0], indentation;
+      if (how == "prev") {
+        if (n) indentation = lines[n-1].indentation();
+        else indentation = 0;
+      }
+      else if (how == "smart") indentation = mode.indent(state, line.text.slice(curSpaceString.length));
+      else if (how == "add") indentation = curSpace + options.indentUnit;
+      else if (how == "subtract") indentation = curSpace - options.indentUnit;
+      indentation = Math.max(0, indentation);
+      var diff = indentation - curSpace;
+
+      if (!diff) {
+        if (sel.from.line != n && sel.to.line != n) return;
+        var indentString = curSpaceString;
+      }
+      else {
+        var indentString = "", pos = 0;
+        if (options.indentWithTabs)
+          for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
+        while (pos < indentation) {++pos; indentString += " ";}
+      }
+
+      replaceRange(indentString, {line: n, ch: 0}, {line: n, ch: curSpaceString.length});
+    }
+
+    function loadMode() {
+      mode = CodeMirror.getMode(options, options.mode);
+      for (var i = 0, l = lines.length; i < l; ++i)
+        lines[i].stateAfter = null;
+      work = [0];
+      startWorker();
+    }
+    function gutterChanged() {
+      var visible = options.gutter || options.lineNumbers;
+      gutter.style.display = visible ? "" : "none";
+      if (visible) updateGutter();
+      else lineDiv.parentNode.style.marginLeft = 0;
+    }
+
+    function markText(from, to, className) {
+      from = clipPos(from); to = clipPos(to);
+      var accum = [];
+      function add(line, from, to, className) {
+        var line = lines[line], mark = line.addMark(from, to, className);
+        mark.line = line;
+        accum.push(mark);
+      }
+      if (from.line == to.line) add(from.line, from.ch, to.ch, className);
+      else {
+        add(from.line, from.ch, null, className);
+        for (var i = from.line + 1, e = to.line; i < e; ++i)
+          add(i, 0, null, className);
+        add(to.line, 0, to.ch, className);
+      }
+      changes.push({from: from.line, to: to.line + 1});
+      return function() {
+        var start, end;
+        for (var i = 0; i < accum.length; ++i) {
+          var mark = accum[i], found = indexOf(lines, mark.line);
+          mark.line.removeMark(mark);
+          if (found > -1) {
+            if (start == null) start = found;
+            end = found;
+          }
+        }
+        if (start != null) changes.push({from: start, to: end + 1});
+      };
+    }
+
+    function addGutterMarker(line, text, className) {
+      if (typeof line == "number") line = lines[clipLine(line)];
+      line.gutterMarker = {text: text, style: className};
+      updateGutter();
+      return line;
+    }
+    function removeGutterMarker(line) {
+      if (typeof line == "number") line = lines[clipLine(line)];
+      line.gutterMarker = null;
+      updateGutter();
+    }
+    function setLineClass(line, className) {
+      if (typeof line == "number") {
+        var no = line;
+        line = lines[clipLine(line)];
+      }
+      else {
+        var no = indexOf(lines, line);
+        if (no == -1) return null;
+      }
+      if (line.className != className) {
+        line.className = className;
+        changes.push({from: no, to: no + 1});
+      }
+      return line;
+    }
+
+    function lineInfo(line) {
+      if (typeof line == "number") {
+        var n = line;
+        line = lines[line];
+        if (!line) return null;
+      }
+      else {
+        var n = indexOf(lines, line);
+        if (n == -1) return null;
+      }
+      var marker = line.gutterMarker;
+      return {line: n, text: line.text, markerText: marker && marker.text, markerClass: marker && marker.style};
+    }
+
+    function stringWidth(str) {
+      measure.innerHTML = "
x
";
+      measure.firstChild.firstChild.firstChild.nodeValue = str;
+      return measure.firstChild.firstChild.offsetWidth || 10;
+    }
+    // These are used to go from pixel positions to character
+    // positions, taking varying character widths into account.
+    function charX(line, pos) {
+      if (pos == 0) return 0;
+      measure.innerHTML = "
" + lines[line].getHTML(null, null, false, pos) + "
";
+      return measure.firstChild.firstChild.offsetWidth;
+    }
+    function charFromX(line, x) {
+      if (x <= 0) return 0;
+      var lineObj = lines[line], text = lineObj.text;
+      function getX(len) {
+        measure.innerHTML = "
" + lineObj.getHTML(null, null, false, len) + "
";
+        return measure.firstChild.firstChild.offsetWidth;
+      }
+      var from = 0, fromX = 0, to = text.length, toX;
+      // Guess a suitable upper bound for our search.
+      var estimated = Math.min(to, Math.ceil(x / stringWidth("x")));
+      for (;;) {
+        var estX = getX(estimated);
+        if (estX <= x && estimated < to) estimated = Math.min(to, Math.ceil(estimated * 1.2));
+        else {toX = estX; to = estimated; break;}
+      }
+      if (x > toX) return to;
+      // Try to guess a suitable lower bound as well.
+      estimated = Math.floor(to * 0.8); estX = getX(estimated);
+      if (estX < x) {from = estimated; fromX = estX;}
+      // Do a binary search between these bounds.
+      for (;;) {
+        if (to - from <= 1) return (toX - x > x - fromX) ? from : to;
+        var middle = Math.ceil((from + to) / 2), middleX = getX(middle);
+        if (middleX > x) {to = middle; toX = middleX;}
+        else {from = middle; fromX = middleX;}
+      }
+    }
+
+    function localCoords(pos, inLineWrap) {
+      var lh = lineHeight(), line = pos.line - (inLineWrap ? showingFrom : 0);
+      return {x: charX(pos.line, pos.ch), y: line * lh, yBot: (line + 1) * lh};
+    }
+    function pageCoords(pos) {
+      var local = localCoords(pos, true), off = eltOffset(lineSpace);
+      return {x: off.left + local.x, y: off.top + local.y, yBot: off.top + local.yBot};
+    }
+
+    function lineHeight() {
+      var nlines = lineDiv.childNodes.length;
+      if (nlines) return (lineDiv.offsetHeight / nlines) || 1;
+      measure.innerHTML = "
x
";
+      return measure.firstChild.offsetHeight || 1;
+    }
+    function paddingTop() {return lineSpace.offsetTop;}
+    function paddingLeft() {return lineSpace.offsetLeft;}
+
+    function posFromMouse(e, liberal) {
+      var offW = eltOffset(scroller, true), x, y;
+      // Fails unpredictably on IE[67] when mouse is dragged around quickly.
+      try { x = e.clientX; y = e.clientY; } catch (e) { return null; }
+      // This is a mess of a heuristic to try and determine whether a
+      // scroll-bar was clicked or not, and to return null if one was
+      // (and !liberal).
+      if (!liberal && (x - offW.left > scroller.clientWidth || y - offW.top > scroller.clientHeight))
+        return null;
+      var offL = eltOffset(lineSpace, true);
+      var line = showingFrom + Math.floor((y - offL.top) / lineHeight());
+      return clipPos({line: line, ch: charFromX(clipLine(line), x - offL.left)});
+    }
+    function onContextMenu(e) {
+      var pos = posFromMouse(e);
+      if (!pos || window.opera) return; // Opera is difficult.
+      if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))
+        operation(setCursor)(pos.line, pos.ch);
+
+      var oldCSS = input.style.cssText;
+      inputDiv.style.position = "absolute";
+      input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e_pageY(e) - 1) +
+        "px; left: " + (e_pageX(e) - 1) + "px; z-index: 1000; background: white; " +
+        "border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
+      leaveInputAlone = true;
+      var val = input.value = getSelection();
+      focusInput();
+      setSelRange(input, 0, input.value.length);
+      function rehide() {
+        var newVal = splitLines(input.value).join("\n");
+        if (newVal != val) operation(replaceSelection)(newVal, "end");
+        inputDiv.style.position = "relative";
+        input.style.cssText = oldCSS;
+        leaveInputAlone = false;
+        prepareInput();
+        slowPoll();
+      }
+      
+      if (gecko) {
+        e_stop(e);
+        var mouseup = connect(window, "mouseup", function() {
+          mouseup();
+          setTimeout(rehide, 20);
+        }, true);
+      }
+      else {
+        setTimeout(rehide, 50);
+      }
+    }
+
+    // Cursor-blinking
+    function restartBlink() {
+      clearInterval(blinker);
+      var on = true;
+      cursor.style.visibility = "";
+      blinker = setInterval(function() {
+        cursor.style.visibility = (on = !on) ? "" : "hidden";
+      }, 650);
+    }
+
+    var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};
+    function matchBrackets(autoclear) {
+      var head = sel.inverted ? sel.from : sel.to, line = lines[head.line], pos = head.ch - 1;
+      var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
+      if (!match) return;
+      var ch = match.charAt(0), forward = match.charAt(1) == ">", d = forward ? 1 : -1, st = line.styles;
+      for (var off = pos + 1, i = 0, e = st.length; i < e; i+=2)
+        if ((off -= st[i].length) <= 0) {var style = st[i+1]; break;}
+
+      var stack = [line.text.charAt(pos)], re = /[(){}[\]]/;
+      function scan(line, from, to) {
+        if (!line.text) return;
+        var st = line.styles, pos = forward ? 0 : line.text.length - 1, cur;
+        for (var i = forward ? 0 : st.length - 2, e = forward ? st.length : -2; i != e; i += 2*d) {
+          var text = st[i];
+          if (st[i+1] != null && st[i+1] != style) {pos += d * text.length; continue;}
+          for (var j = forward ? 0 : text.length - 1, te = forward ? text.length : -1; j != te; j += d, pos+=d) {
+            if (pos >= from && pos < to && re.test(cur = text.charAt(j))) {
+              var match = matching[cur];
+              if (match.charAt(1) == ">" == forward) stack.push(cur);
+              else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false};
+              else if (!stack.length) return {pos: pos, match: true};
+            }
+          }
+        }
+      }
+      for (var i = head.line, e = forward ? Math.min(i + 100, lines.length) : Math.max(-1, i - 100); i != e; i+=d) {
+        var line = lines[i], first = i == head.line;
+        var found = scan(line, first && forward ? pos + 1 : 0, first && !forward ? pos : line.text.length);
+        if (found) break;
+      }
+      if (!found) found = {pos: null, match: false};
+      var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
+      var one = markText({line: head.line, ch: pos}, {line: head.line, ch: pos+1}, style),
+          two = found.pos != null
+            ? markText({line: i, ch: found.pos}, {line: i, ch: found.pos + 1}, style)
+            : function() {};
+      var clear = operation(function(){one(); two();});
+      if (autoclear) setTimeout(clear, 800);
+      else bracketHighlighted = clear;
+    }
+
+    // Finds the line to start with when starting a parse. Tries to
+    // find a line with a stateAfter, so that it can start with a
+    // valid state. If that fails, it returns the line with the
+    // smallest indentation, which tends to need the least context to
+    // parse correctly.
+    function findStartLine(n) {
+      var minindent, minline;
+      for (var search = n, lim = n - 40; search > lim; --search) {
+        if (search == 0) return 0;
+        var line = lines[search-1];
+        if (line.stateAfter) return search;
+        var indented = line.indentation();
+        if (minline == null || minindent > indented) {
+          minline = search;
+          minindent = indented;
+        }
+      }
+      return minline;
+    }
+    function getStateBefore(n) {
+      var start = findStartLine(n), state = start && lines[start-1].stateAfter;
+      if (!state) state = startState(mode);
+      else state = copyState(mode, state);
+      for (var i = start; i < n; ++i) {
+        var line = lines[i];
+        line.highlight(mode, state);
+        line.stateAfter = copyState(mode, state);
+      }
+      if (n < lines.length && !lines[n].stateAfter) work.push(n);
+      return state;
+    }
+    function highlightLines(start, end) {
+      var state = getStateBefore(start);
+      for (var i = start; i < end; ++i) {
+        var line = lines[i];
+        line.highlight(mode, state);
+        line.stateAfter = copyState(mode, state);
+      }
+    }
+    function highlightWorker() {
+      var end = +new Date + options.workTime;
+      var foundWork = work.length;
+      while (work.length) {
+        if (!lines[showingFrom].stateAfter) var task = showingFrom;
+        else var task = work.pop();
+        if (task >= lines.length) continue;
+        var start = findStartLine(task), state = start && lines[start-1].stateAfter;
+        if (state) state = copyState(mode, state);
+        else state = startState(mode);
+
+        var unchanged = 0, compare = mode.compareStates;
+        for (var i = start, l = lines.length; i < l; ++i) {
+          var line = lines[i], hadState = line.stateAfter;
+          if (+new Date > end) {
+            work.push(i);
+            startWorker(options.workDelay);
+            changes.push({from: task, to: i + 1});
+            return;
+          }
+          var changed = line.highlight(mode, state);
+          line.stateAfter = copyState(mode, state);
+          if (compare) {
+            if (hadState && compare(hadState, state)) break;
+          } else {
+            if (changed || !hadState) unchanged = 0;
+            else if (++unchanged > 3) break;
+          }
+        }
+        changes.push({from: task, to: i + 1});
+      }
+      if (foundWork && options.onHighlightComplete)
+        options.onHighlightComplete(instance);
+    }
+    function startWorker(time) {
+      if (!work.length) return;
+      highlight.set(time, operation(highlightWorker));
+    }
+
+    // Operations are used to wrap changes in such a way that each
+    // change won't have to update the cursor and display (which would
+    // be awkward, slow, and error-prone), but instead updates are
+    // batched and then all combined and executed at once.
+    function startOperation() {
+      updateInput = null; changes = []; textChanged = selectionChanged = false;
+    }
+    function endOperation() {
+      var reScroll = false;
+      if (selectionChanged) reScroll = !scrollCursorIntoView();
+      if (changes.length) updateDisplay(changes);
+      else if (selectionChanged) updateCursor();
+      if (reScroll) scrollCursorIntoView();
+      if (selectionChanged) restartBlink();
+
+      // updateInput can be set to a boolean value to force/prevent an
+      // update.
+      if (focused && !leaveInputAlone &&
+          (updateInput === true || (updateInput !== false && selectionChanged)))
+        prepareInput();
+
+      if (selectionChanged && options.matchBrackets)
+        setTimeout(operation(function() {
+          if (bracketHighlighted) {bracketHighlighted(); bracketHighlighted = null;}
+          matchBrackets(false);
+        }), 20);
+      var tc = textChanged; // textChanged can be reset by cursoractivity callback
+      if (selectionChanged && options.onCursorActivity)
+        options.onCursorActivity(instance);
+      if (tc && options.onChange && instance)
+        options.onChange(instance, tc);
+    }
+    var nestedOperation = 0;
+    function operation(f) {
+      return function() {
+        if (!nestedOperation++) startOperation();
+        try {var result = f.apply(this, arguments);}
+        finally {if (!--nestedOperation) endOperation();}
+        return result;
+      };
+    }
+
+    function SearchCursor(query, pos, caseFold) {
+      this.atOccurrence = false;
+      if (caseFold == null) caseFold = typeof query == "string" && query == query.toLowerCase();
+
+      if (pos && typeof pos == "object") pos = clipPos(pos);
+      else pos = {line: 0, ch: 0};
+      this.pos = {from: pos, to: pos};
+
+      // The matches method is filled in based on the type of query.
+      // It takes a position and a direction, and returns an object
+      // describing the next occurrence of the query, or null if no
+      // more matches were found.
+      if (typeof query != "string") // Regexp match
+        this.matches = function(reverse, pos) {
+          if (reverse) {
+            var line = lines[pos.line].text.slice(0, pos.ch), match = line.match(query), start = 0;
+            while (match) {
+              var ind = line.indexOf(match[0]);
+              start += ind;
+              line = line.slice(ind + 1);
+              var newmatch = line.match(query);
+              if (newmatch) match = newmatch;
+              else break;
+              start++;
+            }
+          }
+          else {
+            var line = lines[pos.line].text.slice(pos.ch), match = line.match(query),
+                start = match && pos.ch + line.indexOf(match[0]);
+          }
+          if (match)
+            return {from: {line: pos.line, ch: start},
+                    to: {line: pos.line, ch: start + match[0].length},
+                    match: match};
+        };
+      else { // String query
+        if (caseFold) query = query.toLowerCase();
+        var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
+