// 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"; // Check for problem with IE innerHTML not working when we have a // P (or similar) parent node. try { stringWidth("x"); } catch (e) { if (e.message.match(/unknown runtime/i)) e = new Error("A CodeMirror inside a P-style element does not work in Internet Explorer. (innerHTML bug)"); throw e; } // 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, 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, lastClick, lastDoubleClick, draggingText; // Variables used by startOperation/endOperation to track what // happened during the operation. var updateInput, changes, textChanged, selectionChanged, leaveInputAlone, gutterDirty; // 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;})(); var history = new History(); // Register our event handlers. connect(scroller, "mousedown", operation(onMouseDown)); connect(scroller, "dblclick", operation(onDoubleClick)); connect(lineSpace, "dragstart", onDragStart); // 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(scroller, "scroll", function() { updateDisplay([]); if (options.fixedGutter) gutter.style.left = scroller.scrollLeft + "px"; if (options.onScroll) options.onScroll(instance); }); connect(window, "resize", function() {updateDisplay(true);}); connect(input, "keyup", operation(onKeyUp)); connect(input, "input", function() {fastPoll(curKeyId);}); 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 = wrapper.CodeMirror = { 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" || option == "firstLineNumber") operation(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, dir) { if (isLine(n)) indentLine(n, dir == null ? "smart" : dir ? "add" : "subtract"); }), historySize: function() {return {undo: history.done.length, redo: history.undone.length};}, clearHistory: function() {history = new History();}, 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(markText), setMarker: operation(addGutterMarker), clearMarker: operation(removeGutterMarker), setLineClass: operation(setLineClass), lineInfo: lineInfo, addWidget: function(pos, node, scroll, vert, horiz) { pos = localCoords(clipPos(pos)); var top = pos.yBot, left = pos.x; node.style.position = "absolute"; code.appendChild(node); if (vert == "over") top = pos.y; else if (vert == "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 = node.style.right = ""; if (horiz == "right") { left = code.clientWidth - node.offsetWidth; node.style.right = "0px"; } else { if (horiz == "left") left = 0; else if (horiz == "middle") left = (code.clientWidth - node.offsetWidth) / 2; 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));}, coordsFromIndex: function(index) { var total = lines.length, pos = 0, line, ch, len; for (line = 0; line < total; line++) { len = lines[line].text.length + 1; if (pos + len > index) { ch = index - pos; break; } pos += len; } return clipPos({line: line, ch: ch}); }, operation: function(f){return operation(f)();}, refresh: function(){updateDisplay(true);}, getInputField: function(){return input;}, getWrapperElement: function(){return wrapper;}, getScrollerElement: function(){return scroller;}, getGutterElement: function(){return gutter;} }; function setValue(code) { var top = {line: 0, ch: 0}; updateLines(top, {line: lines.length - 1, ch: lines[lines.length-1].text.length}, splitLines(code), top, top); updateInput = true; } 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; // 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, e); 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(); var now = +new Date; if (lastDoubleClick > now - 400) { e_preventDefault(e); return selectLine(start.line); } else if (lastClick > now - 400) { lastDoubleClick = now; e_preventDefault(e); return selectWordAt(start); } else { lastClick = now; } var last = start, going; if (dragAndDrop && !posEq(sel.from, sel.to) && !posLess(start, sel.from) && !posLess(sel.to, start)) { // Let the drag handler handle this. var up = connect(targetDocument, "mouseup", operation(function(e2) { draggingText = false; up(); if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) { e_preventDefault(e2); setCursor(start.line, start.ch, true); focusInput(); } }), true); draggingText = true; return; } e_preventDefault(e); setCursor(start.line, start.ch, true); 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); focusInput(); updateInput = true; move(); up(); }), true); } function onDoubleClick(e) { var start = posFromMouse(e); if (!start) return; lastDoubleClick = +new Date; e_preventDefault(e); selectWordAt(start); } 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) { pos = clipPos(pos); var end = replaceRange(text.join(""), pos, pos); setSelectionUser(pos, end); } }; 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) { var end = replaceRange(text, pos, pos); var curFrom = sel.from, curTo = sel.to; setSelectionUser(pos, end); if (draggingText) replaceRange("", curFrom, curTo); focusInput(); } } catch(e){} } } function onDragStart(e) { var txt = getSelection(); // This will reset escapeElement htmlEscape(txt); e.dataTransfer.setDragImage(escapeElement, 0, 0); e.dataTransfer.setData("Text", txt); } 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 } if (code == 36) { if (options.smartHome) { smartHome(); return e_preventDefault(e); } } // 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" : "") + (e.altKey ? "a" : "") + code; if (sel.inverted && movementKeys[curKeyId] === true) { var range = selRange(input); if (range) { reducedSelection = {anchor: range.start}; setSelRange(input, range.start, range.start); } } // Don't save the key as a movementkey unless it had a modifier if (!mod && !e.altKey) curKeyId = null; 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, null, newText[0]); for (var i = 1, e = newText.length - 1; i < e; ++i) spliceargs.push(Line.inheritMarks(newText[i], firstLine)); spliceargs.push(lastLine); lines.splice.apply(lines, spliceargs); } } else if (newText.length == 1) { firstLine.replace(from.ch, null, newText[0]); lastLine.replace(null, to.ch, ""); firstLine.append(lastLine); lines.splice(from.line + 1, nlines); } else { var spliceargs = [from.line + 1, nlines - 1]; firstLine.replace(from.ch, null, newText[0]); lastLine.replace(null, to.ch, newText[newText.length-1]); for (var i = 1, e = newText.length - 1; i < e; ++i) spliceargs.push(Line.inheritMarks(newText[i], firstLine)); 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 && keyId) { if (changed == "moved" && movementKeys[keyId] == null) movementKeys[keyId] = true; if (changed == "changed") movementKeys[keyId] = false; } 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 scrollEditorIntoView() { if (!cursor.getBoundingClientRect) return; var rect = cursor.getBoundingClientRect(); var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight); if (rect.top < 0 || rect.bottom > winH) cursor.scrollIntoView(); } 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; var gutterw = options.fixedGutter ? gutter.clientWidth : 0; if (x1 < screenleft + gutterw) { if (x1 < 50) x1 = 0; scroller.scrollLeft = Math.max(0, x1 - 10 - gutterw); 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 (to - pos != domEnd - domPos) gutterDirty = true; } 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"; } if (different || gutterDirty) 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"; gutterDirty = false; } function updateCursor() { var head = sel.inverted ? sel.from : sel.to, lh = lineHeight(); var x = charX(head.line, head.ch); var top = head.line * lh - scroller.scrollTop; inputDiv.style.top = Math.max(Math.min(top, scroller.offsetHeight), 0) + "px"; inputDiv.style.left = (x - scroller.scrollLeft) + "px"; if (posEq(sel.from, sel.to)) { cursor.style.top = (head.line - showingFrom) * lh + "px"; cursor.style.left = x + "px"; 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 smartHome() { var firstNonWS = Math.max(0, lines[sel.from.line].text.search(/\S/)); setCursor(sel.from.line, sel.from.ch <= firstNonWS && sel.from.ch ? 0 : firstNonWS, 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) gutterDirty = true; else lineDiv.parentNode.style.marginLeft = 0; } function markText(from, to, className) { from = clipPos(from); to = clipPos(to); var set = []; function add(line, from, to, className) { mark = lines[line].addMark(from, to, className, set); } 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 new TextMarker(set); } function TextMarker(set) { this.set = set; } TextMarker.prototype.clear = operation(function() { for (var i = 0, e = this.set.length; i < e; ++i) { var mk = this.set[i].marked; for (var j = 0; j < mk.length; ++j) { if (mk[j].set == this.set) mk.splice(j--, 1); } } // We don't know the exact lines that changed. Refreshing is // cheaper than finding them. changes.push({from: 0, to: lines.length}); }); TextMarker.prototype.find = function() { var from, to; for (var i = 0, e = this.set.length; i < e; ++i) { var line = this.set[i], mk = line.marked; for (var j = 0; j < mk.length; ++j) { var mark = mk[j]; if (mark.set == this.set) { if (mark.from != null || mark.to != null) { var found = indexOf(lines, line); if (found > -1) { if (mark.from != null) from = {line: found, ch: mark.from}; if (mark.to != null) to = {line: found, ch: mark.to}; } } } } } return {from: from, to: to}; }; function addGutterMarker(line, text, className) { if (typeof line == "number") line = lines[clipLine(line)]; line.gutterMarker = {text: text, style: className}; gutterDirty = true; return line; } function removeGutterMarker(line) { if (typeof line == "number") line = lines[clipLine(line)]; line.gutterMarker = null; gutterDirty = true; } 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.clientY - 5) + "px; left: " + (e.clientX - 5) + "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); var clear = operation(function(){one.clear(); two && two.clear();}); 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 - 1; 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); } changes.push({from: start, to: n}); 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, realChange = false; 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); if (realChange) changes.push({from: task, to: i + 1}); return; } var changed = line.highlight(mode, state); if (changed) realChange = true; line.stateAfter = copyState(mode, state); if (compare) { if (hadState && compare(hadState, state)) break; } else { if (changed !== false || !hadState) unchanged = 0; else if (++unchanged > 3) break; } } if (realChange) 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 (gutterDirty) updateGutter(); } if (reScroll) scrollCursorIntoView(); if (selectionChanged) {scrollEditorIntoView(); 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;}; var target = query.split("\n"); // Different methods for single-line and multi-line queries if (target.length == 1) this.matches = function(reverse, pos) { var line = fold(lines[pos.line].text), len = query.length, match; if (reverse ? (pos.ch >= len && (match = line.lastIndexOf(query, pos.ch - len)) != -1) : (match = line.indexOf(query, pos.ch)) != -1) return {from: {line: pos.line, ch: match}, to: {line: pos.line, ch: match + len}}; }; else this.matches = function(reverse, pos) { var ln = pos.line, idx = (reverse ? target.length - 1 : 0), match = target[idx], line = fold(lines[ln].text); var offsetA = (reverse ? line.indexOf(match) + match.length : line.lastIndexOf(match)); if (reverse ? offsetA >= pos.ch || offsetA != match.length : offsetA <= pos.ch || offsetA != line.length - match.length) return; for (;;) { if (reverse ? !ln : ln == lines.length - 1) return; line = fold(lines[ln += reverse ? -1 : 1].text); match = target[reverse ? --idx : ++idx]; if (idx > 0 && idx < target.length - 1) { if (line != match) return; else continue; } var offsetB = (reverse ? line.lastIndexOf(match) : line.indexOf(match) + match.length); if (reverse ? offsetB != line.length - match.length : offsetB != match.length) return; var start = {line: pos.line, ch: offsetA}, end = {line: ln, ch: offsetB}; return {from: reverse ? end : start, to: reverse ? start : end}; } }; } } SearchCursor.prototype = { findNext: function() {return this.find(false);}, findPrevious: function() {return this.find(true);}, find: function(reverse) { var self = this, pos = clipPos(reverse ? this.pos.from : this.pos.to); function savePosAndFail(line) { var pos = {line: line, ch: 0}; self.pos = {from: pos, to: pos}; self.atOccurrence = false; return false; } for (;;) { if (this.pos = this.matches(reverse, pos)) { this.atOccurrence = true; return this.pos.match || true; } if (reverse) { if (!pos.line) return savePosAndFail(0); pos = {line: pos.line-1, ch: lines[pos.line-1].text.length}; } else { if (pos.line == lines.length - 1) return savePosAndFail(lines.length); pos = {line: pos.line+1, ch: 0}; } } }, from: function() {if (this.atOccurrence) return copyPos(this.pos.from);}, to: function() {if (this.atOccurrence) return copyPos(this.pos.to);}, replace: function(newText) { var self = this; if (this.atOccurrence) operation(function() { self.pos.to = replaceRange(newText, self.pos.from, self.pos.to); })(); } }; for (var ext in extensions) if (extensions.propertyIsEnumerable(ext) && !instance.propertyIsEnumerable(ext)) instance[ext] = extensions[ext]; return instance; } // (end of function CodeMirror) // The default configuration options. CodeMirror.defaults = { value: "", mode: null, theme: "default", indentUnit: 2, indentWithTabs: false, tabMode: "classic", enterMode: "indent", electricChars: true, onKeyEvent: null, lineNumbers: false, gutter: false, fixedGutter: false, firstLineNumber: 1, readOnly: false, smartHome: true, onChange: null, onCursorActivity: null, onGutterClick: null, onHighlightComplete: null, onFocus: null, onBlur: null, onScroll: null, matchBrackets: false, workTime: 100, workDelay: 200, undoDepth: 40, tabindex: null, document: window.document }; // Known modes, by name and by MIME var modes = {}, mimeModes = {}; CodeMirror.defineMode = function(name, mode) { if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name; modes[name] = mode; }; CodeMirror.defineMIME = function(mime, spec) { mimeModes[mime] = spec; }; CodeMirror.getMode = function(options, spec) { if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) spec = mimeModes[spec]; if (typeof spec == "string") var mname = spec, config = {}; else if (spec != null) var mname = spec.name, config = spec; var mfactory = modes[mname]; if (!mfactory) { if (window.console) console.warn("No mode " + mname + " found, falling back to plain text."); return CodeMirror.getMode(options, "text/plain"); } return mfactory(options, config || {}); }; CodeMirror.listModes = function() { var list = []; for (var m in modes) if (modes.propertyIsEnumerable(m)) list.push(m); return list; }; CodeMirror.listMIMEs = function() { var list = []; for (var m in mimeModes) if (mimeModes.propertyIsEnumerable(m)) list.push({mime: m, mode: mimeModes[m]}); return list; }; var extensions = {}; CodeMirror.defineExtension = function(name, func) { extensions[name] = func; }; CodeMirror.fromTextArea = function(textarea, options) { if (!options) options = {}; options.value = textarea.value; if (!options.tabindex && textarea.tabindex) options.tabindex = textarea.tabindex; function save() {textarea.value = instance.getValue();} if (textarea.form) { // Deplorable hack to make the submit method do the right thing. var rmSubmit = connect(textarea.form, "submit", save, true); if (typeof textarea.form.submit == "function") { var realSubmit = textarea.form.submit; function wrappedSubmit() { save(); textarea.form.submit = realSubmit; textarea.form.submit(); textarea.form.submit = wrappedSubmit; } textarea.form.submit = wrappedSubmit; } } textarea.style.display = "none"; var instance = CodeMirror(function(node) { textarea.parentNode.insertBefore(node, textarea.nextSibling); }, options); instance.save = save; instance.toTextArea = function() { save(); textarea.parentNode.removeChild(instance.getWrapperElement()); textarea.style.display = ""; if (textarea.form) { rmSubmit(); if (typeof textarea.form.submit == "function") textarea.form.submit = realSubmit; } }; return instance; }; // Utility functions for working with state. Exported because modes // sometimes need to do this. function copyState(mode, state) { if (state === true) return state; if (mode.copyState) return mode.copyState(state); var nstate = {}; for (var n in state) { var val = state[n]; if (val instanceof Array) val = val.concat([]); nstate[n] = val; } return nstate; } CodeMirror.startState = startState; function startState(mode, a1, a2) { return mode.startState ? mode.startState(a1, a2) : true; } CodeMirror.copyState = copyState; // The character stream used by a mode's parser. function StringStream(string) { this.pos = this.start = 0; this.string = string; } StringStream.prototype = { eol: function() {return this.pos >= this.string.length;}, sol: function() {return this.pos == 0;}, peek: function() {return this.string.charAt(this.pos);}, next: function() { if (this.pos < this.string.length) return this.string.charAt(this.pos++); }, eat: function(match) { var ch = this.string.charAt(this.pos); if (typeof match == "string") var ok = ch == match; else var ok = ch && (match.test ? match.test(ch) : match(ch)); if (ok) {++this.pos; return ch;} }, eatWhile: function(match) { var start = this.pos; while (this.eat(match)){} return this.pos > start; }, eatSpace: function() { var start = this.pos; while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos; return this.pos > start; }, skipToEnd: function() {this.pos = this.string.length;}, skipTo: function(ch) { var found = this.string.indexOf(ch, this.pos); if (found > -1) {this.pos = found; return true;} }, backUp: function(n) {this.pos -= n;}, column: function() {return countColumn(this.string, this.start);}, indentation: function() {return countColumn(this.string);}, match: function(pattern, consume, caseInsensitive) { if (typeof pattern == "string") { function cased(str) {return caseInsensitive ? str.toLowerCase() : str;} if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) { if (consume !== false) this.pos += pattern.length; return true; } } else { var match = this.string.slice(this.pos).match(pattern); if (match && consume !== false) this.pos += match[0].length; return match; } }, current: function(){return this.string.slice(this.start, this.pos);} }; CodeMirror.StringStream = StringStream; // Line objects. These hold state related to a line, including // highlighting info (the styles array). function Line(text, styles) { this.styles = styles || [text, null]; this.stateAfter = null; this.text = text; this.marked = this.gutterMarker = this.className = null; } Line.inheritMarks = function(text, orig) { var ln = new Line(text), mk = orig.marked; if (mk) { for (var i = 0; i < mk.length; ++i) { if (mk[i].to == null) { var newmk = ln.marked || (ln.marked = []), mark = mk[i]; newmk.push({from: null, to: null, style: mark.style, set: mark.set}); mark.set.push(ln); } } } return ln; } Line.prototype = { // Replace a piece of a line, keeping the styles around it intact. replace: function(from, to_, text) { var st = [], mk = this.marked, to = to_ == null ? this.text.length : to_; copyStyles(0, from, this.styles, st); if (text) st.push(text, null); copyStyles(to, this.text.length, this.styles, st); this.styles = st; this.text = this.text.slice(0, from) + text + this.text.slice(to); this.stateAfter = null; if (mk) { var diff = text.length - (to - from), end = this.text.length; var changeStart = Math.min(from, from + diff); for (var i = 0; i < mk.length; ++i) { var mark = mk[i], del = false; if (mark.from != null && mark.from >= end) del = true; else { if (mark.from != null && mark.from >= from) { mark.from += diff; if (mark.from <= 0) mark.from = from == null ? null : 0; } else if (to_ == null) mark.to = null; if (mark.to != null && mark.to > from) { mark.to += diff; if (mark.to < 0) del = true; } } if (del || (mark.from != null && mark.to != null && mark.from >= mark.to)) mk.splice(i--, 1); } } }, // Split a part off a line, keeping styles and markers intact. split: function(pos, textBefore) { var st = [textBefore, null], mk = this.marked; copyStyles(pos, this.text.length, this.styles, st); var taken = new Line(textBefore + this.text.slice(pos), st); if (mk) { for (var i = 0; i < mk.length; ++i) { var mark = mk[i]; if (mark.to > pos || mark.to == null) { if (!taken.marked) taken.marked = []; taken.marked.push({ from: mark.from < pos || mark.from == null ? null : mark.from - pos + textBefore.length, to: mark.to == null ? null : mark.to - pos + textBefore.length, style: mark.style, set: mark.set }); mark.set.push(taken); } } } return taken; }, append: function(line) { if (!line.text.length) return; var mylen = this.text.length, mk = line.marked; this.text += line.text; copyStyles(0, line.text.length, line.styles, this.styles); if (mk && mk.length) { var mymk = this.marked || (this.marked = []); for (var i = 0; i < mymk.length; ++i) if (mymk[i].to == null) mymk[i].to = mylen; outer: for (var i = 0; i < mk.length; ++i) { var mark = mk[i]; if (!mark.from) { for (var j = 0; j < mymk.length; ++j) { var mymark = mymk[j]; if (mymark.to == mylen && mymark.set == mark.set) { mymark.to = mark.to == null ? null : mark.to + mylen; continue outer; } } } mymk.push(mark); mark.set.push(this); mark.from += mylen; if (mark.to != null) mark.to += mylen; } } }, addMark: function(from, to, style, set) { set.push(this); if (this.marked == null) this.marked = []; this.marked.push({from: from, to: to, style: style, set: set}); this.marked.sort(function(a, b){return (a.from || 0) - (b.from || 0);}); }, // Run the given mode's parser over a line, update the styles // array, which contains alternating fragments of text and CSS // classes. highlight: function(mode, state) { var stream = new StringStream(this.text), st = this.styles, pos = 0; var changed = false, curWord = st[0], prevWord; if (this.text == "" && mode.blankLine) mode.blankLine(state); while (!stream.eol()) { var style = mode.token(stream, state); var substr = this.text.slice(stream.start, stream.pos); stream.start = stream.pos; if (pos && st[pos-1] == style) st[pos-2] += substr; else if (substr) { if (!changed && (st[pos+1] != style || (pos && st[pos-2] != prevWord))) changed = true; st[pos++] = substr; st[pos++] = style; prevWord = curWord; curWord = st[pos]; } // Give up when line is ridiculously long if (stream.pos > 5000) { st[pos++] = this.text.slice(stream.pos); st[pos++] = null; break; } } if (st.length != pos) {st.length = pos; changed = true;} if (pos && st[pos-2] != prevWord) changed = true; // Short lines with simple highlights return null, and are // counted as changed by the driver because they are likely to // highlight the same way in various contexts. return changed || (st.length < 5 && this.text.length < 10 ? null : false); }, // Fetch the parser token for a given character. Useful for hacks // that want to inspect the mode state (say, for completion). getTokenAt: function(mode, state, ch) { var txt = this.text, stream = new StringStream(txt); while (stream.pos < ch && !stream.eol()) { stream.start = stream.pos; var style = mode.token(stream, state); } return {start: stream.start, end: stream.pos, string: stream.current(), className: style || null, state: state}; }, indentation: function() {return countColumn(this.text);}, // Produces an HTML fragment for the line, taking selection, // marking, and highlighting into account. getHTML: function(sfrom, sto, includePre, endAt) { var html = []; if (includePre) html.push(this.className ? '
': "
");
      function span(text, style) {
        if (!text) return;
        if (style) html.push('', htmlEscape(text), "");
        else html.push(htmlEscape(text));
      }
      var st = this.styles, allText = this.text, marked = this.marked;
      if (sfrom == sto) sfrom = null;
      var len = allText.length;
      if (endAt != null) len = Math.min(endAt, len);

      if (!allText && endAt == null)
        span(" ", sfrom != null && sto == null ? "CodeMirror-selected" : null);
      else if (!marked && sfrom == null)
        for (var i = 0, ch = 0; ch < len; i+=2) {
          var str = st[i], style = st[i+1], l = str.length;
          if (ch + l > len) str = str.slice(0, len - ch);
          ch += l;
          span(str, style && "cm-" + style);
        }
      else {
        var pos = 0, i = 0, text = "", style, sg = 0;
        var markpos = -1, mark = null;
        function nextMark() {
          if (marked) {
            markpos += 1;
            mark = (markpos < marked.length) ? marked[markpos] : null;
          }
        }
        nextMark();
        while (pos < len) {
          var upto = len;
          var extraStyle = "";
          if (sfrom != null) {
            if (sfrom > pos) upto = sfrom;
            else if (sto == null || sto > pos) {
              extraStyle = " CodeMirror-selected";
              if (sto != null) upto = Math.min(upto, sto);
            }
          }
          while (mark && mark.to != null && mark.to <= pos) nextMark();
          if (mark) {
            if (mark.from > pos) upto = Math.min(upto, mark.from);
            else {
              extraStyle += " " + mark.style;
              if (mark.to != null) upto = Math.min(upto, mark.to);
            }
          }
          for (;;) {
            var end = pos + text.length;
            var appliedStyle = style;
            if (extraStyle) appliedStyle = style ? style + extraStyle : extraStyle;
            span(end > upto ? text.slice(0, upto - pos) : text, appliedStyle);
            if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
            pos = end;
            text = st[i++]; style = "cm-" + st[i++];
          }
        }
        if (sfrom != null && sto == null) span(" ", "CodeMirror-selected");
      }
      if (includePre) html.push("
"); return html.join(""); } }; // Utility used by replace and split above function copyStyles(from, to, source, dest) { for (var i = 0, pos = 0, state = 0; pos < to; i+=2) { var part = source[i], end = pos + part.length; if (state == 0) { if (end > from) dest.push(part.slice(from - pos, Math.min(part.length, to - pos)), source[i+1]); if (end >= from) state = 1; } else if (state == 1) { if (end > to) dest.push(part.slice(0, to - pos), source[i+1]); else dest.push(part, source[i+1]); } pos = end; } } // The history object 'chunks' changes that are made close together // and at almost the same time into bigger undoable units. function History() { this.time = 0; this.done = []; this.undone = []; } History.prototype = { addChange: function(start, added, old) { this.undone.length = 0; var time = +new Date, last = this.done[this.done.length - 1]; if (time - this.time > 400 || !last || last.start > start + added || last.start + last.added < start - last.added + last.old.length) this.done.push({start: start, added: added, old: old}); else { var oldoff = 0; if (start < last.start) { for (var i = last.start - start - 1; i >= 0; --i) last.old.unshift(old[i]); last.added += last.start - start; last.start = start; } else if (last.start < start) { oldoff = start - last.start; added += oldoff; } for (var i = last.added - oldoff, e = old.length; i < e; ++i) last.old.push(old[i]); if (last.added < added) last.added = added; } this.time = time; } }; function stopMethod() {e_stop(this);} // Ensure an event has a stop method. function addStop(event) { if (!event.stop) event.stop = stopMethod; return event; } function e_preventDefault(e) { if (e.preventDefault) e.preventDefault(); else e.returnValue = false; } function e_stopPropagation(e) { if (e.stopPropagation) e.stopPropagation(); else e.cancelBubble = true; } function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);} function e_target(e) {return e.target || e.srcElement;} function e_button(e) { if (e.which) return e.which; else if (e.button & 1) return 1; else if (e.button & 2) return 3; else if (e.button & 4) return 2; } // Event handler registration. If disconnect is true, it'll return a // function that unregisters the handler. function connect(node, type, handler, disconnect) { function wrapHandler(event) {handler(event || window.event);} if (typeof node.addEventListener == "function") { node.addEventListener(type, wrapHandler, false); if (disconnect) return function() {node.removeEventListener(type, wrapHandler, false);}; } else { node.attachEvent("on" + type, wrapHandler); if (disconnect) return function() {node.detachEvent("on" + type, wrapHandler);}; } } function Delayed() {this.id = null;} Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}}; // Some IE versions don't preserve whitespace when setting the // innerHTML of a PRE tag. var badInnerHTML = (function() { var pre = document.createElement("pre"); pre.innerHTML = " "; return !pre.innerHTML; })(); // Detect drag-and-drop var dragAndDrop = (function() { // IE8 has ondragstart and ondrop properties, but doesn't seem to // actually support ondragstart the way it's supposed to work. if (/MSIE [1-8]\b/.test(navigator.userAgent)) return false; var div = document.createElement('div'); return "ondragstart" in div && "ondrop" in div; })(); var gecko = /gecko\/\d{7}/i.test(navigator.userAgent); var ie = /MSIE \d/.test(navigator.userAgent); var safari = /Apple Computer/.test(navigator.vendor); var lineSep = "\n"; // Feature-detect whether newlines in textareas are converted to \r\n (function () { var te = document.createElement("textarea"); te.value = "foo\nbar"; if (te.value.indexOf("\r") > -1) lineSep = "\r\n"; }()); var tabSize = 8; var mac = /Mac/.test(navigator.platform); var movementKeys = {}; for (var i = 35; i <= 40; ++i) movementKeys[i] = movementKeys["c" + i] = true; // Counts the column offset in a string, taking tabs into account. // Used mostly to find indentation. function countColumn(string, end) { if (end == null) { end = string.search(/[^\s\u00a0]/); if (end == -1) end = string.length; } for (var i = 0, n = 0; i < end; ++i) { if (string.charAt(i) == "\t") n += tabSize - (n % tabSize); else ++n; } return n; } function computedStyle(elt) { if (elt.currentStyle) return elt.currentStyle; return window.getComputedStyle(elt, null); } // Find the position of an element by following the offsetParent chain. // If screen==true, it returns screen (rather than page) coordinates. function eltOffset(node, screen) { var doc = node.ownerDocument.body; var x = 0, y = 0, skipDoc = false; for (var n = node; n; n = n.offsetParent) { x += n.offsetLeft; y += n.offsetTop; if (screen && computedStyle(n).position == "fixed") skipDoc = true; } var e = screen && !skipDoc ? null : doc; for (var n = node.parentNode; n != e; n = n.parentNode) if (n.scrollLeft != null) { x -= n.scrollLeft; y -= n.scrollTop;} return {left: x, top: y}; } // Get a node's text content. function eltText(node) { return node.textContent || node.innerText || node.nodeValue || ""; } // Operations on {line, ch} objects. function posEq(a, b) {return a.line == b.line && a.ch == b.ch;} function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);} function copyPos(x) {return {line: x.line, ch: x.ch};} var escapeElement = document.createElement("pre"); function htmlEscape(str) { if (badTextContent) { escapeElement.innerHTML = ""; escapeElement.appendChild(document.createTextNode(str)); } else { escapeElement.textContent = str; } return escapeElement.innerHTML; } var badTextContent = htmlEscape("\t") != "\t"; CodeMirror.htmlEscape = htmlEscape; // Used to position the cursor after an undo/redo by finding the // last edited character. function editEnd(from, to) { if (!to) return from ? from.length : 0; if (!from) return to.length; for (var i = from.length, j = to.length; i >= 0 && j >= 0; --i, --j) if (from.charAt(i) != to.charAt(j)) break; return j + 1; } function indexOf(collection, elt) { if (collection.indexOf) return collection.indexOf(elt); for (var i = 0, e = collection.length; i < e; ++i) if (collection[i] == elt) return i; return -1; } // See if "".split is the broken IE version, if so, provide an // alternative way to split lines. var splitLines, selRange, setSelRange; if ("\n\nb".split(/\n/).length != 3) splitLines = function(string) { var pos = 0, nl, result = []; while ((nl = string.indexOf("\n", pos)) > -1) { result.push(string.slice(pos, string.charAt(nl-1) == "\r" ? nl - 1 : nl)); pos = nl + 1; } result.push(string.slice(pos)); return result; }; else splitLines = function(string){return string.split(/\r?\n/);}; CodeMirror.splitLines = splitLines; // Sane model of finding and setting the selection in a textarea if (window.getSelection) { selRange = function(te) { try {return {start: te.selectionStart, end: te.selectionEnd};} catch(e) {return null;} }; if (safari) // On Safari, selection set with setSelectionRange are in a sort // of limbo wrt their anchor. If you press shift-left in them, // the anchor is put at the end, and the selection expanded to // the left. If you press shift-right, the anchor ends up at the // front. This is not what CodeMirror wants, so it does a // spurious modify() call to get out of limbo. setSelRange = function(te, start, end) { if (start == end) te.setSelectionRange(start, end); else { te.setSelectionRange(start, end - 1); window.getSelection().modify("extend", "forward", "character"); } }; else setSelRange = function(te, start, end) { try {te.setSelectionRange(start, end);} catch(e) {} // Fails on Firefox when textarea isn't part of the document }; } // IE model. Don't ask. else { selRange = function(te) { try {var range = te.ownerDocument.selection.createRange();} catch(e) {return null;} if (!range || range.parentElement() != te) return null; var val = te.value, len = val.length, localRange = te.createTextRange(); localRange.moveToBookmark(range.getBookmark()); var endRange = te.createTextRange(); endRange.collapse(false); if (localRange.compareEndPoints("StartToEnd", endRange) > -1) return {start: len, end: len}; var start = -localRange.moveStart("character", -len); for (var i = val.indexOf("\r"); i > -1 && i < start; i = val.indexOf("\r", i+1), start++) {} if (localRange.compareEndPoints("EndToEnd", endRange) > -1) return {start: start, end: len}; var end = -localRange.moveEnd("character", -len); for (var i = val.indexOf("\r"); i > -1 && i < end; i = val.indexOf("\r", i+1), end++) {} return {start: start, end: end}; }; setSelRange = function(te, start, end) { var range = te.createTextRange(); range.collapse(true); var endrange = range.duplicate(); var newlines = 0, txt = te.value; for (var pos = txt.indexOf("\n"); pos > -1 && pos < start; pos = txt.indexOf("\n", pos + 1)) ++newlines; range.move("character", start - newlines); for (; pos > -1 && pos < end; pos = txt.indexOf("\n", pos + 1)) ++newlines; endrange.move("character", end - newlines); range.setEndPoint("EndToEnd", endrange); range.select(); }; } CodeMirror.defineMode("null", function() { return {token: function(stream) {stream.skipToEnd();}}; }); CodeMirror.defineMIME("text/plain", "null"); return CodeMirror; })();