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Diffstat (limited to 'plugins/LocalFilesEditor/codemirror/lib/codemirror.js')
| -rw-r--r-- | plugins/LocalFilesEditor/codemirror/lib/codemirror.js | 1915 |
1 files changed, 1915 insertions, 0 deletions
diff --git a/plugins/LocalFilesEditor/codemirror/lib/codemirror.js b/plugins/LocalFilesEditor/codemirror/lib/codemirror.js new file mode 100644 index 000000000..390e68c1f --- /dev/null +++ b/plugins/LocalFilesEditor/codemirror/lib/codemirror.js @@ -0,0 +1,1915 @@ +// 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]; + + // The element in which the editor lives. Takes care of scrolling + // (if enabled). + var wrapper = document.createElement("div"); + wrapper.className = "CodeMirror"; + // This mess creates the base DOM structure for the editor. + wrapper.innerHTML = + '<div style="position: relative">' + // Set to the height of the text, causes scrolling + '<pre style="position: relative; height: 0; visibility: hidden; overflow: hidden;">' + // To measure line/char size + '<span>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</span></pre>' + + '<div style="position: relative">' + // Moved around its parent to cover visible view + '<div class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div>' + + '<div style="overflow: hidden; position: absolute; width: 0; left: 0">' + // Wraps and hides input textarea + '<textarea style="height: 1px; position: absolute; width: 1px;" wrap="off"></textarea></div>' + + // Provides positioning relative to (visible) text origin + '<div class="CodeMirror-lines"><div style="position: relative">' + + '<pre class="CodeMirror-cursor"> </pre>' + // Absolutely positioned blinky cursor + '<div></div></div></div></div></div>'; // 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 code = wrapper.firstChild, measure = code.firstChild, mover = measure.nextSibling, + gutter = mover.firstChild, gutterText = gutter.firstChild, + inputDiv = gutter.nextSibling, input = inputDiv.firstChild, + lineSpace = inputDiv.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; + // 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; + + // Initialize the content. Somewhat hacky (delayed prepareInput) + // to work around browser issues. + operation(function(){setValue(options.value || ""); updateInput = false;})(); + setTimeout(prepareInput, 20); + + // Register our event handlers. + connect(wrapper, "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(wrapper, "contextmenu", operation(onContextMenu)); + connect(code, "dblclick", operation(onDblClick)); + connect(wrapper, "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(wrapper, "dragenter", function(e){e.stop();}); + connect(wrapper, "dragover", function(e){e.stop();}); + connect(wrapper, "drop", operation(onDrop)); + connect(wrapper, "paste", function(){input.focus(); fastPoll();}); + connect(input, "paste", function(){fastPoll();}); + connect(input, "cut", function(){fastPoll();}); + + if (document.activeElement == input) onFocus(); + 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(){input.focus(); onFocus(); fastPoll();}, + setOption: function(option, value) { + options[option] = value; + if (option == "lineNumbers" || option == "gutter") gutterChanged(); + else if (option == "mode" || option == "indentUnit") loadMode(); + }, + 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); + }, + 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 = Math.min(showingTo - 1, showingFrom + Math.floor(coords.y / lineHeight())); + return clipPos({line: line, ch: charFromX(clipLine(line), coords.x)}); + }, + 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) { + var pos = localCoords(clipPos(pos), true); + node.style.top = (showingFrom * lineHeight() + pos.yBot + paddingTop()) + "px"; + node.style.left = (pos.x + paddingLeft()) + "px"; + code.appendChild(node); + if (scroll) + scrollIntoView(pos.x, pos.yBot, pos.x + node.offsetWidth, pos.yBot + 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;} + }; + + 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) { + // First, see if this is a click in the gutter + for (var n = e.target(); n != wrapper; n = n.parentNode) + if (n.parentNode == gutterText) { + if (options.onGutterClick) + options.onGutterClick(instance, indexOf(gutterText.childNodes, n) + showingFrom); + return e.stop(); + } + + if (gecko && e.button() == 3) onContextMenu(e); + if (e.button() != 1) return; + // For button 1, if it was clicked inside the editor + // (posFromMouse returning non-null), we have to adjust the + // selection. + var start = posFromMouse(e), last = start, going; + if (!start) {if (e.target() == wrapper) e.stop(); return;} + setCursor(start.line, start.ch, false); + + if (!focused) onFocus(); + e.stop(); + // And then we have to see if it's a drag event, in which case + // the dragged-over text must be selected. + function end() { + input.focus(); + updateInput = true; + move(); up(); + } + function extend(e) { + var cur = posFromMouse(e, true); + if (cur && !posEq(cur, last)) { + if (!focused) onFocus(); + last = cur; + setSelection(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(document, "mousemove", operation(function(e) { + clearTimeout(going); + e.stop(); + extend(e); + }), true); + var up = connect(document, "mouseup", operation(function(e) { + clearTimeout(going); + var cur = posFromMouse(e); + if (cur) setSelection(start, cur); + e.stop(); + end(); + }), true); + } + function onDblClick(e) { + var pos = posFromMouse(e); + if (!pos) return; + selectWordAt(pos); + e.stop(); + } + function onDrop(e) { + var pos = posFromMouse(e, true), files = e.e.dataTransfer.files; + if (!pos || options.readOnly) return; + if (files && files.length && window.FileReader && window.File) { + var n = files.length, text = Array(n), read = 0; + for (var i = 0; i < n; ++i) loadFile(files[i], i); + 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); + } + } + else { + try { + var text = e.e.dataTransfer.getData("Text"); + if (text) replaceRange(text, pos, pos); + } + catch(e){} + } + } + function onKeyDown(e) { + if (!focused) onFocus(); + + var code = e.e.keyCode; + // Tries to detect ctrl on non-mac, cmd on mac. + var mod = (mac ? e.e.metaKey : e.e.ctrlKey) && !e.e.altKey, anyMod = e.e.ctrlKey || e.e.altKey || e.e.metaKey; + if (code == 16 || e.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.e))) return; + + if (code == 33 || code == 34) {scrollPage(code == 34); return e.stop();} // page up/down + if (mod && (code == 36 || code == 35)) {scrollEnd(code == 36); return e.stop();} // ctrl-home/end + if (mod && code == 65) {selectAll(); return e.stop();} // ctrl-a + if (!options.readOnly) { + if (!anyMod && code == 13) {return;} // enter + if (!anyMod && code == 9 && handleTab(e.e.shiftKey)) return e.stop(); // tab + if (mod && code == 90) {undo(); return e.stop();} // ctrl-z + if (mod && ((e.e.shiftKey && code == 90) || code == 89)) {redo(); return e.stop();} // 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 (reducedSelection) { + reducedSelection = null; + updateInput = true; + } + if (e.e.keyCode == 16) shiftSelecting = null; + } + function onKeyPress(e) { + if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e.e))) return; + if (options.electricChars && mode.electricChars) { + var ch = String.fromCharCode(e.e.charCode == null ? e.e.keyCode : e.e.charCode); + if (mode.electricChars.indexOf(ch) > -1) + setTimeout(operation(function() {indentLine(sel.to.line, "smart");}), 50); + } + var code = e.e.keyCode; + // Re-stop tab and enter. Necessary on some browsers. + if (code == 13) {handleEnter(); e.stop();} + else if (code == 9 && options.tabMode != "default") e.stop(); + else fastPoll(curKeyId); + } + + function onFocus() { + if (!focused && options.onFocus) options.onFocus(instance); + focused = true; + slowPoll(); + if (wrapper.className.search(/\bCodeMirror-focused\b/) == -1) + wrapper.className += " CodeMirror-focused"; + restartBlink(); + } + function onBlur() { + if (focused && options.onBlur) options.onBlur(instance); + clearInterval(blinker); + shiftSelecting = null; + focused = false; + wrapper.className = wrapper.className.replace(" CodeMirror-focused", ""); + } + + // 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); + } + } + function undo() {unredoHelper(history.done, history.undone);} + function redo() {unredoHelper(history.undone, history.done);} + + function updateLinesNoUndo(from, to, newText, selFrom, selTo) { + 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); + } + + // 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) 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 = true; + + // 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() { + 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 (reducedSelection && !moved && sel.from.line == 0 && sel.from.ch == 0) + reducedSelection = null; + else if (!moved) 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) { + from = sr.start == rs.anchor ? to : from; + to = shiftSelecting ? sel.to : sr.start == rs.anchor ? from : to; + if (!posLess(from, to)) { + reducedSelection = null; + sel.inverted = false; + var tmp = from; from = to; to = tmp; + } + } + + // 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 (c == "\n") endline--; + if (text.charAt(end) != c) {++end; ++edend; break;} + 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 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(); + y1 += pt; y2 += pt; x1 += pl; x2 += pl; + var screen = wrapper.clientHeight, screentop = wrapper.scrollTop, scrolled = false, result = true; + if (y1 < screentop) {wrapper.scrollTop = Math.max(0, y1 - 10); scrolled = true;} + else if (y2 > screentop + screen) {wrapper.scrollTop = y2 + 10 - screen; scrolled = true;} + + var screenw = wrapper.clientWidth, screenleft = wrapper.scrollLeft; + if (x1 < screenleft) {wrapper.scrollLeft = Math.max(0, x1 - 10); scrolled = true;} + else if (x2 > screenw + screenleft) { + wrapper.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 = wrapper.scrollTop - paddingTop(); + return {from: Math.min(lines.length, Math.max(0, Math.floor(top / lh))), + to: Math.min(lines.length, Math.ceil((top + wrapper.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 (!wrapper.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 != wrapper.clientHeight; + showingFrom = from; showingTo = to; + mover.style.top = (from * lineHeight()) + "px"; + if (different) { + lastHeight = wrapper.clientHeight; + code.style.height = (lines.length * lineHeight() + 2 * paddingTop()) + "px"; + updateGutter(); + } + + // 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 && document.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(document.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 = wrapper.clientHeight; + gutter.style.height = (hText - hEditor < 2 ? hEditor : hText) + "px"; + var html = []; + for (var i = showingFrom; i < showingTo; ++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 ? '<pre class="' + marker.style + '">' : "<pre>"), text, "</pre>"); + } + 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(document.createTextNode(pad), firstNode.firstChild); + gutter.style.display = ""; + lineSpace.style.marginLeft = gutter.offsetWidth + "px"; + } + function updateCursor() { + var head = sel.inverted ? sel.from : sel.to; + var x = charX(head.line, head.ch) + "px", y = (head.line - showingFrom) * lineHeight() + "px"; + inputDiv.style.top = y; inputDiv.style.left = x; + if (posEq(sel.from, sel.to)) { + cursor.style.top = y; cursor.style.left = x; + cursor.style.display = ""; + } + else cursor.style.display = "none"; + } + + // 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; + var sh = shiftSelecting && clipPos(shiftSelecting); + if (posLess(to, from)) {var tmp = to; to = from; from = tmp;} + if (sh) { + if (posLess(sh, from)) from = sh; + else if (posLess(to, sh)) to = sh; + } + + var startEq = posEq(sel.to, to), endEq = posEq(sel.from, from); + if (posEq(from, to)) sel.inverted = false; + else if (startEq && !endEq) sel.inverted = true; + else if (endEq && !startEq) sel.inverted = false; + + // 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) { + var pos = clipPos({line: line, ch: ch || 0}); + 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(wrapper.clientHeight / lineHeight()), head = sel.inverted ? sel.from : sel.to; + setCursor(head.line + (Math.max(linesPerPage - 1, 1) * (down ? 1 : -1)), head.ch); + } + function scrollEnd(top) { + setCursor(top ? 0 : lines.length - 1); + } + 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 - 1 && /\w/.test(line.charAt(end))) ++end; + setSelection({line: pos.line, ch: start}, {line: pos.line, ch: end}); + } + function handleEnter() { + replaceSelection("\n", "end"); + if (options.enterMode != "flat") + indentLine(sel.from.line, options.enterMode == "keep" ? "prev" : "smart"); + } + function handleTab(shift) { + shiftSelecting = null; + switch (options.tabMode) { + case "default": + return false; + case "indent": + for (var i = sel.from.line, e = sel.to.line; i <= e; ++i) indentLine(i, "smart"); + break; + case "classic": + if (posEq(sel.from, sel.to)) { + if (shift) indentLine(sel.from.line, "smart"); + else replaceSelection("\t", "end"); + break; + } + case "shift": + for (var i = sel.from.line, e = sel.to.line; i <= e; ++i) indentLine(i, 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]; + } + 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; + } + 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}; + } + + // These are used to go from pixel positions to character + // positions, taking tabs into account. + function charX(line, pos) { + var text = lines[line].text, span = measure.firstChild; + if (text.lastIndexOf("\t", pos) == -1) return pos * charWidth(); + var old = span.firstChild.nodeValue; + try { + span.firstChild.nodeValue = text.slice(0, pos); + return span.offsetWidth; + } finally {span.firstChild.nodeValue = old;} + } + function charFromX(line, x) { + var text = lines[line].text, cw = charWidth(); + if (x <= 0) return 0; + if (text.indexOf("\t") == -1) return Math.min(text.length, Math.round(x / cw)); + var mspan = measure.firstChild, mtext = mspan.firstChild, old = mtext.nodeValue; + try { + mtext.nodeValue = text; + var from = 0, fromX = 0, to = text.length, toX = mspan.offsetWidth; + if (x > toX) return to; + for (;;) { + if (to - from <= 1) return (toX - x > x - fromX) ? from : to; + var middle = Math.ceil((from + to) / 2); + mtext.nodeValue = text.slice(0, middle); + var curX = mspan.offsetWidth; + if (curX > x) {to = middle; toX = curX;} + else {from = middle; fromX = curX;} + } + } finally {mtext.nodeValue = old;} + } + + 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; + else return measure.firstChild.offsetHeight || 1; + } + function charWidth() {return (measure.firstChild.offsetWidth || 320) / 40;} + function paddingTop() {return lineSpace.offsetTop;} + function paddingLeft() {return lineSpace.offsetLeft;} + + function posFromMouse(e, liberal) { + var off = eltOffset(lineSpace), + x = e.pageX() - off.left, + y = e.pageY() - off.top; + if (!liberal && e.target() != lineSpace.parentNode && !(e.target() == wrapper && y > (lines.length * lineHeight()))) + for (var n = e.target(); n != lineDiv && n != cursor; n = n.parentNode) + if (!n || n == wrapper) return null; + var line = showingFrom + Math.floor(y / lineHeight()); + return clipPos({line: line, ch: charFromX(clipLine(line), x)}); + } + 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)) + setCursor(pos.line, pos.ch); + + var oldCSS = input.style.cssText; + input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.pageY() - 1) + + "px; left: " + (e.pageX() - 1) + "px; z-index: 1000; background: white; " + + "border-width: 0; outline: none; overflow: hidden;"; + var val = input.value = getSelection(); + input.focus(); + setSelRange(input, 0, val.length); + if (gecko) e.stop(); + leaveInputAlone = true; + setTimeout(function() { + if (input.value != val) operation(replaceSelection)(input.value, "end"); + input.style.cssText = oldCSS; + leaveInputAlone = false; + prepareInput(); + slowPoll(); + }, 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 + 50, lines.length) : Math.max(0, i - 50); 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) { + var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket"; + var one = markText({line: head.line, ch: pos}, {line: head.line, ch: pos+1}, style), + two = markText({line: i, ch: found.pos}, {line: i, ch: found.pos + 1}, style); + var clear = operation(function(){one(); two();}); + if (autoclear) setTimeout(clear, 800); + else bracketHighlighted = clear; + break; + } + } + } + + // 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 (!lines[n].stateAfter) work.push(n); + return state; + } + function highlightWorker() { + var end = +new Date + options.workTime; + 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); + + 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}); + return; + } + var changed = line.highlight(mode, state); + line.stateAfter = copyState(mode, state); + if (hadState && !changed && line.text) break; + } + changes.push({from: task, to: i}); + } + } + 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 (!leaveInputAlone && (updateInput === true || (updateInput !== false && selectionChanged))) + prepareInput(); + + if (selectionChanged && options.onCursorActivity) + options.onCursorActivity(instance); + if (textChanged && options.onChange) + options.onChange(instance); + if (selectionChanged && options.matchBrackets) + setTimeout(operation(function() { + if (bracketHighlighted) {bracketHighlighted(); bracketHighlighted = null;} + matchBrackets(false); + }), 20); + } + 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; + } + } + 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);} + }; + + return instance; + } // (end of function CodeMirror) + + // The default configuration options. + CodeMirror.defaults = { + value: "", + mode: null, + indentUnit: 2, + indentWithTabs: false, + tabMode: "classic", + enterMode: "indent", + electricChars: true, + onKeyEvent: null, + lineNumbers: false, + gutter: false, + firstLineNumber: 1, + readOnly: false, + onChange: null, + onCursorActivity: null, + onGutterClick: null, + onFocus: null, onBlur: null, onScroll: null, + matchBrackets: false, + workTime: 100, + workDelay: 200, + undoDepth: 40, + tabindex: null + }; + + // 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 + 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(m); + return list; + }; + + 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.start; + 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);} + }; + + // 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.prototype = { + // Replace a piece of a line, keeping the styles around it intact. + replace: function(from, to, text) { + var st = [], mk = this.marked; + 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; + function fix(n) {return n <= Math.min(to, to + diff) ? n : n + diff;} + for (var i = 0; i < mk.length; ++i) { + var mark = mk[i], del = false; + if (mark.from >= end) del = true; + else {mark.from = fix(mark.from); if (mark.to != null) mark.to = fix(mark.to);} + if (del || mark.from >= mark.to) {mk.splice(i, 1); i--;} + } + } + }, + // Split a line in two, again keeping styles intact. + split: function(pos, textBefore) { + var st = [textBefore, null]; + copyStyles(pos, this.text.length, this.styles, st); + return new Line(textBefore + this.text.slice(pos), st); + }, + addMark: function(from, to, style) { + var mk = this.marked, mark = {from: from, to: to, style: style}; + if (this.marked == null) this.marked = []; + this.marked.push(mark); + this.marked.sort(function(a, b){return a.from - b.from;}); + return mark; + }, + removeMark: function(mark) { + var mk = this.marked; + if (!mk) return; + for (var i = 0; i < mk.length; ++i) + if (mk[i] == mark) {mk.splice(i, 1); break;} + }, + // 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, changed = false; + 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] != substr || st[pos+1] != style) changed = true; + st[pos++] = substr; st[pos++] = style; + } + // 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;} + return changed; + }, + // 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) { + var html = []; + if (includePre) + html.push(this.className ? '<pre class="' + this.className + '">': "<pre>"); + function span(text, style) { + if (!text) return; + if (style) html.push('<span class="', style, '">', htmlEscape(text), "</span>"); + else html.push(htmlEscape(text)); + } + var st = this.styles, allText = this.text, marked = this.marked; + if (sfrom == sto) sfrom = null; + + if (!allText) + span(" ", sfrom != null && sto == null ? "CodeMirror-selected" : null); + else if (!marked && sfrom == null) + for (var i = 0, e = st.length; i < e; i+=2) span(st[i], st[i+1]); + 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 < allText.length) { + var upto = allText.length; + 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 apliedStyle = style; + if (extraStyle) apliedStyle = style ? style + extraStyle : extraStyle; + span(end > upto ? text.slice(0, upto - pos) : text, apliedStyle); + if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;} + pos = end; + text = st[i++]; style = st[i++]; + } + } + if (sfrom != null && sto == null) span(" ", "CodeMirror-selected"); + } + if (includePre) html.push("</pre>"); + 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; + } + }; + + // Event stopping compatibility wrapper. + function stopEvent() { + if (this.preventDefault) {this.preventDefault(); this.stopPropagation();} + else {this.returnValue = false; this.cancelBubble = true;} + } + // Ensure an event has a stop method. + function addStop(event) { + if (!event.stop) event.stop = stopEvent; + return event; + } + + // Event wrapper, exposing the few operations we need. + function Event(orig) {this.e = orig;} + Event.prototype = { + stop: function() {stopEvent.call(this.e);}, + target: function() {return this.e.target || this.e.srcElement;}, + button: function() { + if (this.e.which) return this.e.which; + else if (this.e.button & 1) return 1; + else if (this.e.button & 2) return 3; + else if (this.e.button & 4) return 2; + }, + pageX: function() { + if (this.e.pageX != null) return this.e.pageX; + else return this.e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft; + }, + pageY: function() { + if (this.e.pageY != null) return this.e.pageY; + else return this.e.clientY + document.body.scrollTop + document.documentElement.scrollTop; + } + }; + + // 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(new Event(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; + })(); + + var gecko = /gecko\/\d{7}/i.test(navigator.userAgent); + + 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; + } + + // Find the position of an element by following the offsetParent chain. + function eltOffset(node) { + var x = 0, y = 0, n2 = node; + for (var n = node; n; n = n.offsetParent) {x += n.offsetLeft; y += n.offsetTop;} + for (var n = node; n != document.body; n = n.parentNode) {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};} + + function htmlEscape(str) { + return str.replace(/[<&]/g, function(str) {return str == "&" ? "&" : "<";}); + } + + // 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. + if ("\n\nb".split(/\n/).length != 3) + var 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 + var splitLines = function(string){return string.split(/\r?\n/);}; + + // Sane model of finding and setting the selection in a textarea + if (window.getSelection) { + var selRange = function(te) { + try {return {start: te.selectionStart, end: te.selectionEnd};} + catch(e) {return null;} + }; + var 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 { + var selRange = function(te) { + try {var range = document.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}; + }; + var 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; +})(); |