esprima
Version:
ECMAScript parsing infrastructure for multipurpose analysis
1,159 lines (1,101 loc) • 121 kB
JavaScript
// CodeMirror version 2.23
//
// 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. Its
// 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.
var wrapper = document.createElement("div");
wrapper.className = "CodeMirror" + (options.lineWrapping ? " CodeMirror-wrap" : "");
// This mess creates the base DOM structure for the editor.
wrapper.innerHTML =
'<div style="overflow: hidden; position: relative; width: 3px; height: 0px;">' + // Wraps and hides input textarea
'<textarea style="position: absolute; padding: 0; width: 1px; height: 1em" wrap="off" ' +
'autocorrect="off" autocapitalize="off"></textarea></div>' +
'<div class="CodeMirror-scroll" tabindex="-1">' +
'<div style="position: relative">' + // Set to the height of the text, causes scrolling
'<div style="position: relative">' + // Moved around its parent to cover visible view
'<div class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div>' +
// Provides positioning relative to (visible) text origin
'<div class="CodeMirror-lines"><div style="position: relative; z-index: 0">' +
'<div style="position: absolute; width: 100%; height: 0; overflow: hidden; visibility: hidden;"></div>' +
'<pre class="CodeMirror-cursor"> </pre>' + // Absolutely positioned blinky cursor
'<div style="position: relative; z-index: -1"></div><div></div>' + // DIVs containing the selection and the actual code
'</div></div></div></div></div>';
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,
mover = code.firstChild, gutter = mover.firstChild, gutterText = gutter.firstChild,
lineSpace = gutter.nextSibling.firstChild, measure = lineSpace.firstChild,
cursor = measure.nextSibling, selectionDiv = cursor.nextSibling,
lineDiv = selectionDiv.nextSibling;
themeChanged();
// Needed to hide big blue blinking cursor on Mobile Safari
if (ios) input.style.width = "0px";
if (!webkit) lineSpace.draggable = true;
lineSpace.style.outline = "none";
if (options.tabindex != null) input.tabIndex = options.tabindex;
if (options.autofocus) focusInput();
if (!options.gutter && !options.lineNumbers) gutter.style.display = "none";
// Needed to handle Tab key in KHTML
if (khtml) inputDiv.style.height = "1px", inputDiv.style.position = "absolute";
// Check for problem with IE innerHTML not working when we have a
// P (or similar) parent node.
try { stringWidth("x"); }
catch (e) {
if (e.message.match(/runtime/i))
e = new Error("A CodeMirror inside a P-style element does not work in Internet Explorer. (innerHTML bug)");
throw e;
}
// Delayed object wrap timeouts, making sure only one is active. blinker holds an interval.
var poll = new Delayed(), highlight = new Delayed(), blinker;
// mode holds a mode API object. doc is the tree of Line objects,
// work an array of lines that should be parsed, and history the
// undo history (instance of History constructor).
var mode, doc = new BranchChunk([new LeafChunk([new Line("")])]), work, focused;
loadMode();
// The selection. These are always maintained to point at valid
// positions. Inverted is used to remember that the user is
// selecting bottom-to-top.
var sel = {from: {line: 0, ch: 0}, to: {line: 0, ch: 0}, inverted: false};
// Selection-related flags. shiftSelecting obviously tracks
// whether the user is holding shift.
var shiftSelecting, lastClick, lastDoubleClick, lastScrollPos = 0, draggingText,
overwrite = false, suppressEdits = false;
// Variables used by startOperation/endOperation to track what
// happened during the operation.
var updateInput, userSelChange, changes, textChanged, selectionChanged, leaveInputAlone,
gutterDirty, callbacks;
// Current visible range (may be bigger than the view window).
var displayOffset = 0, showingFrom = 0, showingTo = 0, lastSizeC = 0;
// bracketHighlighted is used to remember that a bracket has been
// marked.
var bracketHighlighted;
// Tracks the maximum line length so that the horizontal scrollbar
// can be kept static when scrolling.
var maxLine = "", maxWidth;
var tabCache = {};
// Initialize the content.
operation(function(){setValue(options.value || ""); updateInput = false;})();
var history = new History();
// Register our event handlers.
connect(scroller, "mousedown", operation(onMouseDown));
connect(scroller, "dblclick", operation(onDoubleClick));
connect(lineSpace, "dragstart", onDragStart);
connect(lineSpace, "selectstart", e_preventDefault);
// Gecko browsers fire contextmenu *after* opening the menu, at
// which point we can't mess with it anymore. Context menu is
// handled in onMouseDown for Gecko.
if (!gecko) connect(scroller, "contextmenu", onContextMenu);
connect(scroller, "scroll", function() {
lastScrollPos = scroller.scrollTop;
updateDisplay([]);
if (options.fixedGutter) gutter.style.left = scroller.scrollLeft + "px";
if (options.onScroll) options.onScroll(instance);
});
connect(window, "resize", function() {updateDisplay(true);});
connect(input, "keyup", operation(onKeyUp));
connect(input, "input", fastPoll);
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", fastPoll);
connect(input, "cut", operation(function(){
if (!options.readOnly) replaceSelection("");
}));
// Needed to handle Tab key in KHTML
if (khtml) connect(code, "mouseup", function() {
if (document.activeElement == input) input.blur();
focusInput();
});
// IE throws unspecified error in certain cases, when
// trying to access activeElement before onload
var hasFocus; try { hasFocus = (document.activeElement == input); } catch(e) { }
if (hasFocus || options.autofocus) setTimeout(onFocus, 20);
else onBlur();
function isLine(l) {return l >= 0 && l < doc.size;}
// The instance object that we'll return. Mostly calls out to
// local functions in the CodeMirror function. Some do some extra
// range checking and/or clipping. operation is used to wrap the
// call so that changes it makes are tracked, and the display is
// updated afterwards.
var instance = wrapper.CodeMirror = {
getValue: getValue,
setValue: operation(setValue),
getSelection: getSelection,
replaceSelection: operation(replaceSelection),
focus: function(){window.focus(); focusInput(); onFocus(); fastPoll();},
setOption: function(option, value) {
var oldVal = options[option];
options[option] = value;
if (option == "mode" || option == "indentUnit") loadMode();
else if (option == "readOnly" && value == "nocursor") {onBlur(); input.blur();}
else if (option == "readOnly" && !value) {resetInput(true);}
else if (option == "theme") themeChanged();
else if (option == "lineWrapping" && oldVal != value) operation(wrappingChanged)();
else if (option == "tabSize") updateDisplay(true);
if (option == "lineNumbers" || option == "gutter" || option == "firstLineNumber" || option == "theme") {
gutterChanged();
updateDisplay(true);
}
},
getOption: function(option) {return options[option];},
undo: operation(undo),
redo: operation(redo),
indentLine: operation(function(n, dir) {
if (typeof dir != "string") {
if (dir == null) dir = options.smartIndent ? "smart" : "prev";
else dir = dir ? "add" : "subtract";
}
if (isLine(n)) indentLine(n, dir);
}),
indentSelection: operation(indentSelected),
historySize: function() {return {undo: history.done.length, redo: history.undone.length};},
clearHistory: function() {history = new History();},
matchBrackets: operation(function(){matchBrackets(true);}),
getTokenAt: operation(function(pos) {
pos = clipPos(pos);
return getLine(pos.line).getTokenAt(mode, getStateBefore(pos.line), pos.ch);
}),
getStateAfter: function(line) {
line = clipLine(line == null ? doc.size - 1: line);
return getStateBefore(line + 1);
},
cursorCoords: function(start, mode) {
if (start == null) start = sel.inverted;
return this.charCoords(start ? sel.from : sel.to, mode);
},
charCoords: function(pos, mode) {
pos = clipPos(pos);
if (mode == "local") return localCoords(pos, false);
if (mode == "div") return localCoords(pos, true);
return pageCoords(pos);
},
coordsChar: function(coords) {
var off = eltOffset(lineSpace);
return coordsChar(coords.x - off.left, coords.y - off.top);
},
markText: operation(markText),
setBookmark: setBookmark,
findMarksAt: findMarksAt,
setMarker: operation(addGutterMarker),
clearMarker: operation(removeGutterMarker),
setLineClass: operation(setLineClass),
hideLine: operation(function(h) {return setLineHidden(h, true);}),
showLine: operation(function(h) {return setLineHidden(h, false);}),
onDeleteLine: function(line, f) {
if (typeof line == "number") {
if (!isLine(line)) return null;
line = getLine(line);
}
(line.handlers || (line.handlers = [])).push(f);
return line;
},
lineInfo: lineInfo,
addWidget: function(pos, node, scroll, vert, horiz) {
pos = localCoords(clipPos(pos));
var top = pos.yBot, left = pos.x;
node.style.position = "absolute";
code.appendChild(node);
if (vert == "over") top = pos.y;
else if (vert == "near") {
var vspace = Math.max(scroller.offsetHeight, doc.height * textHeight()),
hspace = Math.max(code.clientWidth, lineSpace.clientWidth) - paddingLeft();
if (pos.yBot + node.offsetHeight > vspace && pos.y > node.offsetHeight)
top = pos.y - node.offsetHeight;
if (left + node.offsetWidth > hspace)
left = hspace - node.offsetWidth;
}
node.style.top = (top + paddingTop()) + "px";
node.style.left = node.style.right = "";
if (horiz == "right") {
left = code.clientWidth - node.offsetWidth;
node.style.right = "0px";
} else {
if (horiz == "left") left = 0;
else if (horiz == "middle") left = (code.clientWidth - node.offsetWidth) / 2;
node.style.left = (left + paddingLeft()) + "px";
}
if (scroll)
scrollIntoView(left, top, left + node.offsetWidth, top + node.offsetHeight);
},
lineCount: function() {return doc.size;},
clipPos: clipPos,
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, user) {
if (ch == null && typeof line.line == "number") setCursor(line.line, line.ch, user);
else setCursor(line, ch, user);
}),
setSelection: operation(function(from, to, user) {
(user ? setSelectionUser : setSelection)(clipPos(from), clipPos(to || from));
}),
getLine: function(line) {if (isLine(line)) return getLine(line).text;},
getLineHandle: function(line) {if (isLine(line)) return getLine(line);},
setLine: operation(function(line, text) {
if (isLine(line)) replaceRange(text, {line: line, ch: 0}, {line: line, ch: getLine(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));},
triggerOnKeyDown: operation(onKeyDown),
execCommand: function(cmd) {return commands[cmd](instance);},
// Stuff used by commands, probably not much use to outside code.
moveH: operation(moveH),
deleteH: operation(deleteH),
moveV: operation(moveV),
toggleOverwrite: function() {
if(overwrite){
overwrite = false;
cursor.className = cursor.className.replace(" CodeMirror-overwrite", "");
} else {
overwrite = true;
cursor.className += " CodeMirror-overwrite";
}
},
posFromIndex: function(off) {
var lineNo = 0, ch;
doc.iter(0, doc.size, function(line) {
var sz = line.text.length + 1;
if (sz > off) { ch = off; return true; }
off -= sz;
++lineNo;
});
return clipPos({line: lineNo, ch: ch});
},
indexFromPos: function (coords) {
if (coords.line < 0 || coords.ch < 0) return 0;
var index = coords.ch;
doc.iter(0, coords.line, function (line) {
index += line.text.length + 1;
});
return index;
},
scrollTo: function(x, y) {
if (x != null) scroller.scrollLeft = x;
if (y != null) scroller.scrollTop = y;
updateDisplay([]);
},
operation: function(f){return operation(f)();},
refresh: function(){
updateDisplay(true);
if (scroller.scrollHeight > lastScrollPos)
scroller.scrollTop = lastScrollPos;
},
getInputField: function(){return input;},
getWrapperElement: function(){return wrapper;},
getScrollerElement: function(){return scroller;},
getGutterElement: function(){return gutter;}
};
function getLine(n) { return getLineAt(doc, n); }
function updateLineHeight(line, height) {
gutterDirty = true;
var diff = height - line.height;
for (var n = line; n; n = n.parent) n.height += diff;
}
function setValue(code) {
var top = {line: 0, ch: 0};
updateLines(top, {line: doc.size - 1, ch: getLine(doc.size-1).text.length},
splitLines(code), top, top);
updateInput = true;
}
function getValue(code) {
var text = [];
doc.iter(0, doc.size, function(line) { text.push(line.text); });
return text.join("\n");
}
function onMouseDown(e) {
setShift(e_prop(e, "shiftKey"));
// 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;
// See if this is a click in the gutter
for (var n = e_target(e); n != wrapper; n = n.parentNode)
if (n.parentNode == gutterText) {
if (options.onGutterClick)
options.onGutterClick(instance, indexOf(gutterText.childNodes, n) + showingFrom, e);
return e_preventDefault(e);
}
var start = posFromMouse(e);
switch (e_button(e)) {
case 3:
if (gecko && !mac) onContextMenu(e);
return;
case 2:
if (start) setCursor(start.line, start.ch, true);
return;
}
// For button 1, if it was clicked inside the editor
// (posFromMouse returning non-null), we have to adjust the
// selection.
if (!start) {if (e_target(e) == scroller) e_preventDefault(e); return;}
if (!focused) onFocus();
var now = +new Date;
if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {
e_preventDefault(e);
setTimeout(focusInput, 20);
return selectLine(start.line);
} else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {
lastDoubleClick = {time: now, pos: start};
e_preventDefault(e);
return selectWordAt(start);
} else { lastClick = {time: now, pos: start}; }
var last = start, going;
if (dragAndDrop && !options.readOnly && !posEq(sel.from, sel.to) &&
!posLess(start, sel.from) && !posLess(sel.to, start)) {
// Let the drag handler handle this.
if (webkit) lineSpace.draggable = true;
var up = connect(document, "mouseup", operation(function(e2) {
if (webkit) lineSpace.draggable = false;
draggingText = false;
up();
if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
e_preventDefault(e2);
setCursor(start.line, start.ch, true);
focusInput();
}
}), true);
draggingText = true;
// IE's approach to draggable
if (lineSpace.dragDrop) lineSpace.dragDrop();
return;
}
e_preventDefault(e);
setCursor(start.line, start.ch, true);
function extend(e) {
var cur = posFromMouse(e, true);
if (cur && !posEq(cur, last)) {
if (!focused) onFocus();
last = cur;
setSelectionUser(start, cur);
updateInput = false;
var visible = visibleLines();
if (cur.line >= visible.to || cur.line < visible.from)
going = setTimeout(operation(function(){extend(e);}), 150);
}
}
function done(e) {
clearTimeout(going);
var cur = posFromMouse(e);
if (cur) setSelectionUser(start, cur);
e_preventDefault(e);
focusInput();
updateInput = true;
move(); up();
}
var move = connect(document, "mousemove", operation(function(e) {
clearTimeout(going);
e_preventDefault(e);
if (!ie && !e_button(e)) done(e);
else extend(e);
}), true);
var up = connect(document, "mouseup", operation(done), true);
}
function onDoubleClick(e) {
for (var n = e_target(e); n != wrapper; n = n.parentNode)
if (n.parentNode == gutterText) return e_preventDefault(e);
var start = posFromMouse(e);
if (!start) return;
lastDoubleClick = {time: +new Date, pos: start};
e_preventDefault(e);
selectWordAt(start);
}
function onDrop(e) {
e.preventDefault();
var pos = posFromMouse(e, true), files = e.dataTransfer.files;
if (!pos || options.readOnly) return;
if (files && files.length && window.FileReader && window.File) {
function loadFile(file, i) {
var reader = new FileReader;
reader.onload = function() {
text[i] = reader.result;
if (++read == n) {
pos = clipPos(pos);
operation(function() {
var end = replaceRange(text.join(""), pos, pos);
setSelectionUser(pos, end);
})();
}
};
reader.readAsText(file);
}
var n = files.length, text = Array(n), read = 0;
for (var i = 0; i < n; ++i) loadFile(files[i], i);
}
else {
try {
var text = e.dataTransfer.getData("Text");
if (text) {
var curFrom = sel.from, curTo = sel.to;
setSelectionUser(pos, pos);
if (draggingText) replaceRange("", curFrom, curTo);
replaceSelection(text);
focusInput();
}
}
catch(e){}
}
}
function onDragStart(e) {
var txt = getSelection();
e.dataTransfer.setData("Text", txt);
// Use dummy image instead of default browsers image.
if (gecko || chrome) {
var img = document.createElement('img');
img.scr = 'data:image/gif;base64,R0lGODdhAgACAIAAAAAAAP///ywAAAAAAgACAAACAoRRADs='; //1x1 image
e.dataTransfer.setDragImage(img, 0, 0);
}
}
function doHandleBinding(bound, dropShift) {
if (typeof bound == "string") {
bound = commands[bound];
if (!bound) return false;
}
var prevShift = shiftSelecting;
try {
if (options.readOnly) suppressEdits = true;
if (dropShift) shiftSelecting = null;
bound(instance);
} catch(e) {
if (e != Pass) throw e;
return false;
} finally {
shiftSelecting = prevShift;
suppressEdits = false;
}
return true;
}
function handleKeyBinding(e) {
// Handle auto keymap transitions
var startMap = getKeyMap(options.keyMap), next = startMap.auto;
clearTimeout(maybeTransition);
if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
if (getKeyMap(options.keyMap) == startMap) {
options.keyMap = (next.call ? next.call(null, instance) : next);
}
}, 50);
var name = keyNames[e_prop(e, "keyCode")], handled = false;
if (name == null || e.altGraphKey) return false;
if (e_prop(e, "altKey")) name = "Alt-" + name;
if (e_prop(e, "ctrlKey")) name = "Ctrl-" + name;
if (e_prop(e, "metaKey")) name = "Cmd-" + name;
if (e_prop(e, "shiftKey")) {
handled = lookupKey("Shift-" + name, options.extraKeys, options.keyMap,
function(b) {return doHandleBinding(b, true);})
|| lookupKey(name, options.extraKeys, options.keyMap, function(b) {
if (typeof b == "string" && /^go[A-Z]/.test(b)) return doHandleBinding(b);
});
} else {
handled = lookupKey(name, options.extraKeys, options.keyMap, doHandleBinding);
}
if (handled) {
e_preventDefault(e);
if (ie) { e.oldKeyCode = e.keyCode; e.keyCode = 0; }
}
return handled;
}
function handleCharBinding(e, ch) {
var handled = lookupKey("'" + ch + "'", options.extraKeys,
options.keyMap, doHandleBinding);
if (handled) e_preventDefault(e);
return handled;
}
var lastStoppedKey = null, maybeTransition;
function onKeyDown(e) {
if (!focused) onFocus();
if (ie && e.keyCode == 27) { e.returnValue = false; }
if (pollingFast) { if (readInput()) pollingFast = false; }
if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return;
var code = e_prop(e, "keyCode");
// IE does strange things with escape.
setShift(code == 16 || e_prop(e, "shiftKey"));
// First give onKeyEvent option a chance to handle this.
var handled = handleKeyBinding(e);
if (window.opera) {
lastStoppedKey = handled ? code : null;
// Opera has no cut event... we try to at least catch the key combo
if (!handled && code == 88 && e_prop(e, mac ? "metaKey" : "ctrlKey"))
replaceSelection("");
}
}
function onKeyPress(e) {
if (pollingFast) readInput();
if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return;
var keyCode = e_prop(e, "keyCode"), charCode = e_prop(e, "charCode");
if (window.opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
if (((window.opera && !e.which) || khtml) && handleKeyBinding(e)) return;
var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
if (options.electricChars && mode.electricChars && options.smartIndent && !options.readOnly) {
if (mode.electricChars.indexOf(ch) > -1)
setTimeout(operation(function() {indentLine(sel.to.line, "smart");}), 75);
}
if (handleCharBinding(e, ch)) return;
fastPoll();
}
function onKeyUp(e) {
if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return;
if (e_prop(e, "keyCode") == 16) shiftSelecting = null;
}
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) resetInput(true);
}
slowPoll();
restartBlink();
}
function onBlur() {
if (focused) {
if (options.onBlur) options.onBlur(instance);
focused = false;
if (bracketHighlighted)
operation(function(){
if (bracketHighlighted) { bracketHighlighted(); bracketHighlighted = null; }
})();
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 (suppressEdits) return;
if (history) {
var old = [];
doc.iter(from.line, to.line + 1, function(line) { old.push(line.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) {
if (!from.length) return;
var set = from.pop(), out = [];
for (var i = set.length - 1; i >= 0; i -= 1) {
var change = set[i];
var replaced = [], end = change.start + change.added;
doc.iter(change.start, end, function(line) { replaced.push(line.text); });
out.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: getLine(end-1).text.length}, change.old, pos, pos);
}
updateInput = true;
to.push(out);
}
function undo() {unredoHelper(history.done, history.undone);}
function redo() {unredoHelper(history.undone, history.done);}
function updateLinesNoUndo(from, to, newText, selFrom, selTo) {
if (suppressEdits) return;
var recomputeMaxLength = false, maxLineLength = maxLine.length;
if (!options.lineWrapping)
doc.iter(from.line, to.line, function(line) {
if (line.text.length == maxLineLength) {recomputeMaxLength = true; return true;}
});
if (from.line != to.line || newText.length > 1) gutterDirty = true;
var nlines = to.line - from.line, firstLine = getLine(from.line), lastLine = getLine(to.line);
// First adjust the line structure, taking some care to leave highlighting intact.
if (from.ch == 0 && to.ch == 0 && newText[newText.length - 1] == "") {
// This is a whole-line replace. Treated specially to make
// sure line objects move the way they are supposed to.
var added = [], prevLine = null;
if (from.line) {
prevLine = getLine(from.line - 1);
prevLine.fixMarkEnds(lastLine);
} else lastLine.fixMarkStarts();
for (var i = 0, e = newText.length - 1; i < e; ++i)
added.push(Line.inheritMarks(newText[i], prevLine));
if (nlines) doc.remove(from.line, nlines, callbacks);
if (added.length) doc.insert(from.line, added);
} else 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]);
firstLine.replace(from.ch, null, newText[0]);
firstLine.fixMarkEnds(lastLine);
var added = [];
for (var i = 1, e = newText.length - 1; i < e; ++i)
added.push(Line.inheritMarks(newText[i], firstLine));
added.push(lastLine);
doc.insert(from.line + 1, added);
}
} else if (newText.length == 1) {
firstLine.replace(from.ch, null, newText[0]);
lastLine.replace(null, to.ch, "");
firstLine.append(lastLine);
doc.remove(from.line + 1, nlines, callbacks);
} else {
var added = [];
firstLine.replace(from.ch, null, newText[0]);
lastLine.replace(null, to.ch, newText[newText.length-1]);
firstLine.fixMarkEnds(lastLine);
for (var i = 1, e = newText.length - 1; i < e; ++i)
added.push(Line.inheritMarks(newText[i], firstLine));
if (nlines > 1) doc.remove(from.line + 1, nlines - 1, callbacks);
doc.insert(from.line + 1, added);
}
if (options.lineWrapping) {
var perLine = scroller.clientWidth / charWidth() - 3;
doc.iter(from.line, from.line + newText.length, function(line) {
if (line.hidden) return;
var guess = Math.ceil(line.text.length / perLine) || 1;
if (guess != line.height) updateLineHeight(line, guess);
});
} else {
doc.iter(from.line, i + newText.length, function(line) {
var l = line.text;
if (l.length > maxLineLength) {
maxLine = l; maxLineLength = l.length; maxWidth = null;
recomputeMaxLength = false;
}
});
if (recomputeMaxLength) {
maxLineLength = 0; maxLine = ""; maxWidth = null;
doc.iter(0, doc.size, function(line) {
var l = line.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);
}
var hlEnd = from.line + Math.min(newText.length, 500);
highlightLines(from.line, hlEnd);
newWork.push(hlEnd);
work = newWork;
startWorker(100);
// Remember that these lines changed, for updating the display
changes.push({from: from.line, to: to.line + 1, diff: lendiff});
var changeObj = {from: from, to: to, text: newText};
if (textChanged) {
for (var cur = textChanged; cur.next; cur = cur.next) {}
cur.next = changeObj;
} else textChanged = changeObj;
// 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.
if (scroller.clientHeight)
code.style.height = (doc.height * textHeight() + 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 getLine(l1).text.slice(from.ch, to.ch);
var code = [getLine(l1).text.slice(from.ch)];
doc.iter(l1 + 1, l2, function(line) { code.push(line.text); });
code.push(getLine(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(options.pollInterval, function() {
startOperation();
readInput();
if (focused) slowPoll();
endOperation();
});
}
function fastPoll() {
var missed = false;
pollingFast = true;
function p() {
startOperation();
var changed = readInput();
if (!changed && !missed) {missed = true; poll.set(60, p);}
else {pollingFast = false; slowPoll();}
endOperation();
}
poll.set(20, p);
}
// Previnput is a hack to work with IME. If we reset the textarea
// on every change, that breaks IME. So we look for changes
// compared to the previous content instead. (Modern browsers have
// events that indicate IME taking place, but these are not widely
// supported or compatible enough yet to rely on.)
var prevInput = "";
function readInput() {
if (leaveInputAlone || !focused || hasSelection(input) || options.readOnly) return false;
var text = input.value;
if (text == prevInput) return false;
shiftSelecting = null;
var same = 0, l = Math.min(prevInput.length, text.length);
while (same < l && prevInput[same] == text[same]) ++same;
if (same < prevInput.length)
sel.from = {line: sel.from.line, ch: sel.from.ch - (prevInput.length - same)};
else if (overwrite && posEq(sel.from, sel.to))
sel.to = {line: sel.to.line, ch: Math.min(getLine(sel.to.line).text.length, sel.to.ch + (text.length - same))};
replaceSelection(text.slice(same), "end");
prevInput = text;
return true;
}
function resetInput(user) {
if (!posEq(sel.from, sel.to)) {
prevInput = "";
input.value = getSelection();
selectInput(input);
} else if (user) prevInput = input.value = "";
}
function focusInput() {
if (options.readOnly != "nocursor") input.focus();
}
function scrollEditorIntoView() {
if (!cursor.getBoundingClientRect) return;
var rect = cursor.getBoundingClientRect();
// IE returns bogus coordinates when the instance sits inside of an iframe and the cursor is hidden
if (ie && rect.top == rect.bottom) return;
var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight);
if (rect.top < 0 || rect.bottom > winH) cursor.scrollIntoView();
}
function scrollCursorIntoView() {
var cursor = localCoords(sel.inverted ? sel.from : sel.to);
var x = options.lineWrapping ? Math.min(cursor.x, lineSpace.offsetWidth) : cursor.x;
return scrollIntoView(x, cursor.y, x, cursor.yBot);
}
function scrollIntoView(x1, y1, x2, y2) {
var pl = paddingLeft(), pt = paddingTop();
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); scrolled = true;}
else if (y2 > screentop + screen) {scroller.scrollTop = y2 - screen; scrolled = true;}
var screenw = scroller.clientWidth, screenleft = scroller.scrollLeft;
var gutterw = options.fixedGutter ? gutter.clientWidth : 0;
if (x1 < screenleft + gutterw) {
if (x1 < 50) x1 = 0;
scroller.scrollLeft = Math.max(0, x1 - 10 - gutterw);
scrolled = true;
}
else if (x2 > screenw + screenleft - 3) {
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 = textHeight(), top = scroller.scrollTop - paddingTop();
var from_height = Math.max(0, Math.floor(top / lh));
var to_height = Math.ceil((top + scroller.clientHeight) / lh);
return {from: lineAtHeight(doc, from_height),
to: lineAtHeight(doc, to_height)};
}
// 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, suppressCallback) {
if (!scroller.clientWidth) {
showingFrom = showingTo = displayOffset = 0;
return;
}
// Compute the new visible window
var visible = visibleLines();
// Bail out if the visible area is already rendered and nothing changed.
if (changes !== true && changes.length == 0 && visible.from > showingFrom && visible.to < showingTo) return;
var from = Math.max(visible.from - 100, 0), to = Math.min(doc.size, visible.to + 100);
if (showingFrom < from && from - showingFrom < 20) from = showingFrom;
if (showingTo > to && showingTo - to < 20) to = Math.min(doc.size, showingTo);
// Create a range of theoretically intact lines, and punch holes
// in that using the change info.
var intact = changes === true ? [] :
computeIntact([{from: showingFrom, to: showingTo, domStart: 0}], changes);
// Clip off the parts that won't be visible
var intactLines = 0;
for (var i = 0; i < intact.length; ++i) {
var range = intact[i];
if (range.from < from) {range.domStart += (from - range.from); range.from = from;}
if (range.to > to) range.to = to;
if (range.from >= range.to) intact.splice(i--, 1);
else intactLines += range.to - range.from;
}
if (intactLines == to - from) return;
intact.sort(function(a, b) {return a.domStart - b.domStart;});
var th = textHeight(), gutterDisplay = gutter.style.display;
lineDiv.style.display = "none";
patchDisplay(from, to, intact);
lineDiv.style.display = gutter.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 || lastSizeC != scroller.clientHeight + th;
// This is just a bogus formula that detects when the editor is
// resized or the font size changes.
if (different) lastSizeC = scroller.clientHeight + th;
showingFrom = from; showingTo = to;
displayOffset = heightAtLine(doc, from);
mover.style.top = (displayOffset * th) + "px";
if (scroller.clientHeight)
code.style.height = (doc.height * th + 2 * paddingTop()) + "px";
// 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(intact) + " size=" + (showingTo - showingFrom) +
" nodes=" + lineDiv.childNodes.length);
function checkHeights() {
maxWidth = scroller.clientWidth;
var curNode = lineDiv.firstChild, heightChanged = false;
doc.iter(showingFrom, showingTo, function(line) {
if (!line.hidden) {
var height = Math.round(curNode.offsetHeight / th) || 1;
if (line.height != height) {
updateLineHeight(line, height);
gutterDirty = heightChanged = true;
}
}
curNode = curNode.nextSibling;
});
if (heightChanged)
code.style.height = (doc.height * th + 2 * paddingTop()) + "px";
return heightChanged;
}
if (options.lineWrapping) {
checkHeights();
} else {
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 = "";
}
}
gutter.style.display = gutterDisplay;
if (different || gutterDirty) {
// If the gutter grew in size, re-check heights. If those changed, re-draw gutter.
updateGutter() && options.lineWrapping && checkHeights() && updateGutter();
}
updateSelection();
if (!suppressCallback && options.onUpdate) options.onUpdate(instance);
return true;
}
function computeIntact(intact, changes) {
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 && change.diff)
intact2.push({from: range.from + diff, to: range.to + diff,
domStart: range.domStart});
else if (change.to <= range.from || change.from >= range.to)
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;
}
return intact;
}
function patchDisplay(from, to, intact) {
// The first pass removes the DOM nodes that aren't intact.
if (!intact.length) lineDiv.innerHTML = "";
else {
function killNode(node) {
var tmp = node.nextSibling;
node.parentNode.removeChild(node);
return tmp;
}
var domPos = 0, curNode = lineDiv.firstChild, n;
for (var i = 0; i < intact.length; ++i) {
var cur = intact[i];
while (cur.domStart > domPos) {curNode = killNode(curNode); domPos++;}
for (var j = 0, e = cur.to - cur.from; j < e; ++j) {curNode = curNode.nextSibling; domPos++;}
}
while (curNode) curNode = killNode(curNode);
}
// This pass fills in the lines that actually changed.
var nextIntact = intact.shift(), curNode = lineDiv.firstChild, j = from;
var scratch = document.createElement("div");
doc.iter(from, to, function(line) {
if (nextIntact && nextIntact.to == j) nextIntact = intact.shift();
if (!nextIntact || nextIntact.from > j) {
if (line.hidden) var html = scratch.innerHTML = "<pre></pre>";
else {
var html = '<pre' + (line.className ? ' class="' + line.className + '"' : '') + '>'
+ line.getHTML(makeTab) + '</pre>';
// Kludge to make sure the styled element lies behind the selection (by z-index)
if (line.bgClassName)
html = '<div style="position: relative"><pre class="' + line.bgClassName +
'" style="position: absolute; left: 0; right: 0; top: 0; bottom: 0; z-index: -2"> </pre>' + html + "</div>";
}
scratch.innerHTML = html;
lineDiv.insertBefore(scratch.firstChild, curNode);
} else {
curNode = curNode.nextSibling;
}
++j;
});
}
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 = [], i = showingFrom, normalNode;
doc.iter(showingFrom, Math.max(showingTo, showingFrom + 1), function(line) {
if (line.hidden) {
html.push("<pre></pre>");
} else {
var marker = line.gutterMarker;
var text = options.lineNumbers ? i + options.firstLineNumber : null;
if (marker && marker.text)
text = marker.text.replace("%N%", text != null ? text : "");
else if (text == null)
text = "\u00a0";
html.push((marker && marker.style ? '<pre class="' + marker.style + '">' : "<pre>"), text);
for (var j = 1; j < line.height; ++j) html.push("<br/> ");
html.push("</pre>");
if (!marker) normalNode = i;
}
++i;
});
gutter.style.display = "none";
gutterText.innerHTML = html.join("");
// Make sure scrolling doesn't cause number gutter size to pop
if (normalNode != null) {
var node = gutterText.childNodes[normalNode - showingFrom];
var minwidth = String(doc.size).length, val = eltText(node), pad = "";
while (val.length + pad.length < minwidth) pad += "\u00a0";
if (pad) node.insertBefore(document.createTextNode(pad), node.firstChild);
}
gutter.style.display = "";
var resized = Math.abs((parseInt(lineSpace.style.marginLeft) || 0) - gutter.offsetWidth) > 2;
lineSpace.style.marginLeft = gutter.offsetWidth + "px";
gutterDirty = false;
return resized;
}
function updateSelection() {
var collapsed = posEq(sel.from, sel.to);
var fromPos = localCoords(sel.from, true);
var toPos = collapsed ? fromPos : localCoords(sel.to, true);
var headPos = sel.inverted ? fromPos : toPos, th = textHeight();
var wrapOff = eltOffset(wrapper), lineOff = eltOffset(lineDiv);
inputDiv.style.top = Math.max(0, Math.min(scroller.offsetHeight, headPos.y + lineOff.top - wrapOff.top)) + "px";
inputDiv.style.left = Math.max(0, Math.min(scroller.offsetWidth, headPos.x + lineOff.left - wrapOff.left)) + "px";
if (collapsed) {
cursor.style.top = headPos.y + "px";
cursor.style.left = (options.lineWrapping ? Math.min(headPos.x, lineSpace.offsetWidth) : headPos.x) + "px";
cursor.style.display = "";
selectionDiv.style.display = "none";
} else {
var sameLine = fromPos.y == toPos.y, html = "";
function add(left, top, right, height) {
html += '<div class="CodeMirror-selected" style="position: absolute; left: ' + left +
'px; top: ' + top + 'px; right: ' + right + 'px; height: ' + height + 'px"></div>';
}
var clientWidth = lineSpace.clientWidth || lineSpace.offsetWidth;
var clientHeight = lineSpace.clientHeight || lineSpace.offsetHeight;
if (sel.from.ch && fromPos.y >= 0) {
var right = sameLine ? clientWidth - toPos.x : 0;
add(fromPos.x, fromPos.y, right, th);
}
var middleStart = Math.max(0, fromPos.y + (sel.from.ch ? th : 0));
var middleHeight = Math.min(toPos.y, clientHeight) - middleStart;
if (middleHeight > 0.2 * th)
add(0, middleStart, 0, middleHeight);
if ((!sameLine || !sel.from.ch) && toPos.y < clientHeight - .5 * th)
add(0, toPos.y, clientWidth - toPos.x, th);
selectionDiv.innerHTML = html;
cursor.style.display = "none";
selectionDiv.style.display = "";
}
}
function setShift(val) {
if (val) shiftSelecting = shiftSelecting || (sel.inverted ? sel.to : sel.from);
else shiftSelecting = null;
}
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);
userSelChange = true;
}
// 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) {
goalColumn = null;
if (oldFrom == null) {oldFrom = sel.from.line; oldTo = sel.to.line;}
if (posEq(sel.from, from) && posEq(sel.to, to)) return;
if (posLess(to, from)) {var tmp = to; to = from; from = tmp;}
// Skip over hidden lines.
if (from.line != oldFrom) {
var from1 = skipHidden(from, oldFrom, sel.from.ch);
// If there is no non-hidden line left, force visibility on current line
if (!from1) setLineHidde