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