// 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 =
'' + // Set to the height of the text, causes scrolling
'
' + // To measure line/char size
'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' +
'
' + // Moved around its parent to cover visible view
'
' +
'
' + // Wraps and hides input textarea
'
' +
// Provides positioning relative to (visible) text origin
'
' +
'
' + // Absolutely positioned blinky cursor
'
' : ""), 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(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 ? '': "");
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;
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("");
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;
})();