app/assets/javascripts/puffer/codemirror.js
// CodeMirror version 3.01
//
// CodeMirror is the only global var we claim
window.CodeMirror = (function() {
"use strict";
// BROWSER SNIFFING
// Crude, but necessary to handle a number of hard-to-feature-detect
// bugs and behavior differences.
var gecko = /gecko\/\d/i.test(navigator.userAgent);
var ie = /MSIE \d/.test(navigator.userAgent);
var ie_lt8 = ie && (document.documentMode == null || document.documentMode < 8);
var ie_lt9 = ie && (document.documentMode == null || document.documentMode < 9);
var webkit = /WebKit\//.test(navigator.userAgent);
var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
var chrome = /Chrome\//.test(navigator.userAgent);
var opera = /Opera\//.test(navigator.userAgent);
var safari = /Apple Computer/.test(navigator.vendor);
var khtml = /KHTML\//.test(navigator.userAgent);
var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent);
var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
var phantom = /PhantomJS/.test(navigator.userAgent);
var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
// This is woefully incomplete. Suggestions for alternative methods welcome.
var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent);
var mac = ios || /Mac/.test(navigator.platform);
var windows = /windows/i.test(navigator.platform);
var opera_version = opera && navigator.userAgent.match(/Version\/(\d*\.\d*)/);
if (opera_version) opera_version = Number(opera_version[1]);
// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
var flipCtrlCmd = mac && (qtwebkit || opera && (opera_version == null || opera_version < 12.11));
// Optimize some code when these features are not used
var sawReadOnlySpans = false, sawCollapsedSpans = false;
// CONSTRUCTOR
function CodeMirror(place, options) {
if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
this.options = options = options || {};
// Determine effective options based on given values and defaults.
for (var opt in defaults) if (!options.hasOwnProperty(opt) && defaults.hasOwnProperty(opt))
options[opt] = defaults[opt];
setGuttersForLineNumbers(options);
var display = this.display = makeDisplay(place);
display.wrapper.CodeMirror = this;
updateGutters(this);
if (options.autofocus && !mobile) focusInput(this);
this.view = makeView(new BranchChunk([new LeafChunk([makeLine("", null, textHeight(display))])]));
this.nextOpId = 0;
loadMode(this);
themeChanged(this);
if (options.lineWrapping)
this.display.wrapper.className += " CodeMirror-wrap";
// Initialize the content.
this.setValue(options.value || "");
// Override magic textarea content restore that IE sometimes does
// on our hidden textarea on reload
if (ie) setTimeout(bind(resetInput, this, true), 20);
this.view.history = makeHistory();
registerEventHandlers(this);
// IE throws unspecified error in certain cases, when
// trying to access activeElement before onload
var hasFocus; try { hasFocus = (document.activeElement == display.input); } catch(e) { }
if (hasFocus || (options.autofocus && !mobile)) setTimeout(bind(onFocus, this), 20);
else onBlur(this);
operation(this, function() {
for (var opt in optionHandlers)
if (optionHandlers.propertyIsEnumerable(opt))
optionHandlers[opt](this, options[opt], Init);
for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
})();
}
// DISPLAY CONSTRUCTOR
function makeDisplay(place) {
var d = {};
var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none;");
if (webkit) input.style.width = "1000px";
else input.setAttribute("wrap", "off");
input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off");
// Wraps and hides input textarea
d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
// The actual fake scrollbars.
d.scrollbarH = elt("div", [elt("div", null, null, "height: 1px")], "CodeMirror-hscrollbar");
d.scrollbarV = elt("div", [elt("div", null, null, "width: 1px")], "CodeMirror-vscrollbar");
d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
// DIVs containing the selection and the actual code
d.lineDiv = elt("div");
d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
// Blinky cursor, and element used to ensure cursor fits at the end of a line
d.cursor = elt("div", "\u00a0", "CodeMirror-cursor");
// Secondary cursor, shown when on a 'jump' in bi-directional text
d.otherCursor = elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor");
// Used to measure text size
d.measure = elt("div", null, "CodeMirror-measure");
// Wraps everything that needs to exist inside the vertically-padded coordinate system
d.lineSpace = elt("div", [d.measure, d.selectionDiv, d.lineDiv, d.cursor, d.otherCursor],
null, "position: relative; outline: none");
// Moved around its parent to cover visible view
d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
// Set to the height of the text, causes scrolling
d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
// D is needed because behavior of elts with overflow: auto and padding is inconsistent across browsers
d.heightForcer = elt("div", "\u00a0", null, "position: absolute; height: " + scrollerCutOff + "px");
// Will contain the gutters, if any
d.gutters = elt("div", null, "CodeMirror-gutters");
d.lineGutter = null;
// Helper element to properly size the gutter backgrounds
var scrollerInner = elt("div", [d.sizer, d.heightForcer, d.gutters], null, "position: relative; min-height: 100%");
// Provides scrolling
d.scroller = elt("div", [scrollerInner], "CodeMirror-scroll");
d.scroller.setAttribute("tabIndex", "-1");
// The element in which the editor lives.
d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV,
d.scrollbarFiller, d.scroller], "CodeMirror");
// Work around IE7 z-index bug
if (ie_lt8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper);
// Needed to hide big blue blinking cursor on Mobile Safari
if (ios) input.style.width = "0px";
if (!webkit) d.scroller.draggable = true;
// Needed to handle Tab key in KHTML
if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; }
// Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
else if (ie_lt8) d.scrollbarH.style.minWidth = d.scrollbarV.style.minWidth = "18px";
// Current visible range (may be bigger than the view window).
d.viewOffset = d.showingFrom = d.showingTo = d.lastSizeC = 0;
// Used to only resize the line number gutter when necessary (when
// the amount of lines crosses a boundary that makes its width change)
d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
// See readInput and resetInput
d.prevInput = "";
// Set to true when a non-horizontal-scrolling widget is added. As
// an optimization, widget aligning is skipped when d is false.
d.alignWidgets = false;
// Flag that indicates whether we currently expect input to appear
// (after some event like 'keypress' or 'input') and are polling
// intensively.
d.pollingFast = false;
// Self-resetting timeout for the poller
d.poll = new Delayed();
// True when a drag from the editor is active
d.draggingText = false;
d.cachedCharWidth = d.cachedTextHeight = null;
d.measureLineCache = [];
d.measureLineCachePos = 0;
// Tracks when resetInput has punted to just putting a short
// string instead of the (large) selection.
d.inaccurateSelection = false;
// Used to adjust overwrite behaviour when a paste has been
// detected
d.pasteIncoming = false;
// Used for measuring wheel scrolling granularity
d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
return d;
}
// VIEW CONSTRUCTOR
function makeView(doc) {
var selPos = {line: 0, ch: 0};
return {
doc: doc,
// frontier is the point up to which the content has been parsed,
frontier: 0, highlight: new Delayed(),
sel: {from: selPos, to: selPos, head: selPos, anchor: selPos, shift: false, extend: false},
scrollTop: 0, scrollLeft: 0,
overwrite: false, focused: false,
// Tracks the maximum line length so that
// the horizontal scrollbar can be kept
// static when scrolling.
maxLine: getLine(doc, 0),
maxLineLength: 0,
maxLineChanged: false,
suppressEdits: false,
goalColumn: null,
cantEdit: false,
keyMaps: [],
overlays: [],
modeGen: 0
};
}
// STATE UPDATES
// Used to get the editor into a consistent state again when options change.
function loadMode(cm) {
var doc = cm.view.doc;
cm.view.mode = CodeMirror.getMode(cm.options, cm.options.mode);
doc.iter(0, doc.size, function(line) {
if (line.stateAfter) line.stateAfter = null;
if (line.styles) line.styles = null;
});
cm.view.frontier = 0;
startWorker(cm, 100);
cm.view.modeGen++;
if (cm.curOp) regChange(cm, 0, doc.size);
}
function wrappingChanged(cm) {
var doc = cm.view.doc, th = textHeight(cm.display);
if (cm.options.lineWrapping) {
cm.display.wrapper.className += " CodeMirror-wrap";
var perLine = cm.display.scroller.clientWidth / charWidth(cm.display) - 3;
doc.iter(0, doc.size, function(line) {
if (line.height == 0) return;
var guess = Math.ceil(line.text.length / perLine) || 1;
if (guess != 1) updateLineHeight(line, guess * th);
});
cm.display.sizer.style.minWidth = "";
} else {
cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", "");
computeMaxLength(cm.view);
doc.iter(0, doc.size, function(line) {
if (line.height != 0) updateLineHeight(line, th);
});
}
regChange(cm, 0, doc.size);
clearCaches(cm);
setTimeout(function(){updateScrollbars(cm.display, cm.view.doc.height);}, 100);
}
function keyMapChanged(cm) {
var style = keyMap[cm.options.keyMap].style;
cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") +
(style ? " cm-keymap-" + style : "");
}
function themeChanged(cm) {
cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
clearCaches(cm);
}
function guttersChanged(cm) {
updateGutters(cm);
updateDisplay(cm, true);
}
function updateGutters(cm) {
var gutters = cm.display.gutters, specs = cm.options.gutters;
removeChildren(gutters);
for (var i = 0; i < specs.length; ++i) {
var gutterClass = specs[i];
var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
if (gutterClass == "CodeMirror-linenumbers") {
cm.display.lineGutter = gElt;
gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
}
}
gutters.style.display = i ? "" : "none";
}
function lineLength(doc, line) {
if (line.height == 0) return 0;
var len = line.text.length, merged, cur = line;
while (merged = collapsedSpanAtStart(cur)) {
var found = merged.find();
cur = getLine(doc, found.from.line);
len += found.from.ch - found.to.ch;
}
cur = line;
while (merged = collapsedSpanAtEnd(cur)) {
var found = merged.find();
len -= cur.text.length - found.from.ch;
cur = getLine(doc, found.to.line);
len += cur.text.length - found.to.ch;
}
return len;
}
function computeMaxLength(view) {
view.maxLine = getLine(view.doc, 0);
view.maxLineLength = lineLength(view.doc, view.maxLine);
view.maxLineChanged = true;
view.doc.iter(1, view.doc.size, function(line) {
var len = lineLength(view.doc, line);
if (len > view.maxLineLength) {
view.maxLineLength = len;
view.maxLine = line;
}
});
}
// Make sure the gutters options contains the element
// "CodeMirror-linenumbers" when the lineNumbers option is true.
function setGuttersForLineNumbers(options) {
var found = false;
for (var i = 0; i < options.gutters.length; ++i) {
if (options.gutters[i] == "CodeMirror-linenumbers") {
if (options.lineNumbers) found = true;
else options.gutters.splice(i--, 1);
}
}
if (!found && options.lineNumbers)
options.gutters.push("CodeMirror-linenumbers");
}
// SCROLLBARS
// Re-synchronize the fake scrollbars with the actual size of the
// content. Optionally force a scrollTop.
function updateScrollbars(d /* display */, docHeight) {
var totalHeight = docHeight + 2 * paddingTop(d);
d.sizer.style.minHeight = d.heightForcer.style.top = totalHeight + "px";
var scrollHeight = Math.max(totalHeight, d.scroller.scrollHeight);
var needsH = d.scroller.scrollWidth > d.scroller.clientWidth;
var needsV = scrollHeight > d.scroller.clientHeight;
if (needsV) {
d.scrollbarV.style.display = "block";
d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0";
d.scrollbarV.firstChild.style.height =
(scrollHeight - d.scroller.clientHeight + d.scrollbarV.clientHeight) + "px";
} else d.scrollbarV.style.display = "";
if (needsH) {
d.scrollbarH.style.display = "block";
d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0";
d.scrollbarH.firstChild.style.width =
(d.scroller.scrollWidth - d.scroller.clientWidth + d.scrollbarH.clientWidth) + "px";
} else d.scrollbarH.style.display = "";
if (needsH && needsV) {
d.scrollbarFiller.style.display = "block";
d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px";
} else d.scrollbarFiller.style.display = "";
if (mac_geLion && scrollbarWidth(d.measure) === 0)
d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px";
}
function visibleLines(display, doc, viewPort) {
var top = display.scroller.scrollTop, height = display.wrapper.clientHeight;
if (typeof viewPort == "number") top = viewPort;
else if (viewPort) {top = viewPort.top; height = viewPort.bottom - viewPort.top;}
top = Math.floor(top - paddingTop(display));
var bottom = Math.ceil(top + height);
return {from: lineAtHeight(doc, top), to: lineAtHeight(doc, bottom)};
}
// LINE NUMBERS
function alignHorizontally(cm) {
var display = cm.display;
if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.view.scrollLeft;
var gutterW = display.gutters.offsetWidth, l = comp + "px";
for (var n = display.lineDiv.firstChild; n; n = n.nextSibling) if (n.alignable) {
for (var i = 0, a = n.alignable; i < a.length; ++i) a[i].style.left = l;
}
if (cm.options.fixedGutter)
display.gutters.style.left = (comp + gutterW) + "px";
}
function maybeUpdateLineNumberWidth(cm) {
if (!cm.options.lineNumbers) return false;
var doc = cm.view.doc, last = lineNumberFor(cm.options, doc.size - 1), display = cm.display;
if (last.length != display.lineNumChars) {
var test = display.measure.appendChild(elt("div", [elt("div", last)],
"CodeMirror-linenumber CodeMirror-gutter-elt"));
var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
display.lineGutter.style.width = "";
display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding);
display.lineNumWidth = display.lineNumInnerWidth + padding;
display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
display.lineGutter.style.width = display.lineNumWidth + "px";
return true;
}
return false;
}
function lineNumberFor(options, i) {
return String(options.lineNumberFormatter(i + options.firstLineNumber));
}
function compensateForHScroll(display) {
return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left;
}
// DISPLAY DRAWING
function updateDisplay(cm, changes, viewPort) {
var oldFrom = cm.display.showingFrom, oldTo = cm.display.showingTo;
var updated = updateDisplayInner(cm, changes, viewPort);
if (updated) {
signalLater(cm, cm, "update", cm);
if (cm.display.showingFrom != oldFrom || cm.display.showingTo != oldTo)
signalLater(cm, cm, "viewportChange", cm, cm.display.showingFrom, cm.display.showingTo);
}
updateSelection(cm);
updateScrollbars(cm.display, cm.view.doc.height);
return updated;
}
// Uses a set of changes plus the current scroll position to
// determine which DOM updates have to be made, and makes the
// updates.
function updateDisplayInner(cm, changes, viewPort) {
var display = cm.display, doc = cm.view.doc;
if (!display.wrapper.clientWidth) {
display.showingFrom = display.showingTo = display.viewOffset = 0;
return;
}
// Compute the new visible window
// If scrollTop is specified, use that to determine which lines
// to render instead of the current scrollbar position.
var visible = visibleLines(display, doc, viewPort);
// Bail out if the visible area is already rendered and nothing changed.
if (changes !== true && changes.length == 0 &&
visible.from > display.showingFrom && visible.to < display.showingTo)
return;
if (changes && maybeUpdateLineNumberWidth(cm))
changes = true;
var gutterW = display.sizer.style.marginLeft = display.gutters.offsetWidth + "px";
display.scrollbarH.style.left = cm.options.fixedGutter ? gutterW : "0";
// When merged lines are present, the line that needs to be
// redrawn might not be the one that was changed.
if (changes !== true && sawCollapsedSpans)
for (var i = 0; i < changes.length; ++i) {
var ch = changes[i], merged;
while (merged = collapsedSpanAtStart(getLine(doc, ch.from))) {
var from = merged.find().from.line;
if (ch.diff) ch.diff -= ch.from - from;
ch.from = from;
}
}
// Used to determine which lines need their line numbers updated
var positionsChangedFrom = changes === true ? 0 : Infinity;
if (cm.options.lineNumbers && changes && changes !== true)
for (var i = 0; i < changes.length; ++i)
if (changes[i].diff) { positionsChangedFrom = changes[i].from; break; }
var from = Math.max(visible.from - cm.options.viewportMargin, 0);
var to = Math.min(doc.size, visible.to + cm.options.viewportMargin);
if (display.showingFrom < from && from - display.showingFrom < 20) from = display.showingFrom;
if (display.showingTo > to && display.showingTo - to < 20) to = Math.min(doc.size, display.showingTo);
if (sawCollapsedSpans) {
from = lineNo(visualLine(doc, getLine(doc, from)));
while (to < doc.size && lineIsHidden(getLine(doc, to))) ++to;
}
// Create a range of theoretically intact lines, and punch holes
// in that using the change info.
var intact = changes === true ? [] :
computeIntact([{from: display.showingFrom, to: display.showingTo}], 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.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 && from == display.showingFrom && to == display.showingTo)
return;
intact.sort(function(a, b) {return a.from - b.from;});
var focused = document.activeElement;
if (intactLines < (to - from) * .7) display.lineDiv.style.display = "none";
patchDisplay(cm, from, to, intact, positionsChangedFrom);
display.lineDiv.style.display = "";
if (document.activeElement != focused && focused.offsetHeight) focused.focus();
var different = from != display.showingFrom || to != display.showingTo ||
display.lastSizeC != display.wrapper.clientHeight;
// This is just a bogus formula that detects when the editor is
// resized or the font size changes.
if (different) display.lastSizeC = display.wrapper.clientHeight;
display.showingFrom = from; display.showingTo = to;
startWorker(cm, 100);
var prevBottom = display.lineDiv.offsetTop;
for (var node = display.lineDiv.firstChild, height; node; node = node.nextSibling) if (node.lineObj) {
if (ie_lt8) {
var bot = node.offsetTop + node.offsetHeight;
height = bot - prevBottom;
prevBottom = bot;
} else {
var box = node.getBoundingClientRect();
height = box.bottom - box.top;
}
var diff = node.lineObj.height - height;
if (height < 2) height = textHeight(display);
if (diff > .001 || diff < -.001) {
updateLineHeight(node.lineObj, height);
var widgets = node.lineObj.widgets;
if (widgets) for (var i = 0; i < widgets.length; ++i)
widgets[i].height = widgets[i].node.offsetHeight;
}
}
display.viewOffset = heightAtLine(cm, getLine(doc, from));
// Position the mover div to align with the current virtual scroll position
display.mover.style.top = display.viewOffset + "px";
if (visibleLines(display, doc, viewPort).to >= to)
updateDisplayInner(cm, [], viewPort);
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});
} 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});
if (change.to < range.to)
intact2.push({from: change.to + diff, to: range.to + diff});
}
}
intact = intact2;
}
return intact;
}
function getDimensions(cm) {
var d = cm.display, left = {}, width = {};
for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
left[cm.options.gutters[i]] = n.offsetLeft;
width[cm.options.gutters[i]] = n.offsetWidth;
}
return {fixedPos: compensateForHScroll(d),
gutterTotalWidth: d.gutters.offsetWidth,
gutterLeft: left,
gutterWidth: width,
wrapperWidth: d.wrapper.clientWidth};
}
function patchDisplay(cm, from, to, intact, updateNumbersFrom) {
var dims = getDimensions(cm);
var display = cm.display, lineNumbers = cm.options.lineNumbers;
if (!intact.length && (!webkit || !cm.display.currentWheelTarget))
removeChildren(display.lineDiv);
var container = display.lineDiv, cur = container.firstChild;
function rm(node) {
var next = node.nextSibling;
if (webkit && mac && cm.display.currentWheelTarget == node) {
node.style.display = "none";
node.lineObj = null;
} else {
node.parentNode.removeChild(node);
}
return next;
}
var nextIntact = intact.shift(), lineNo = from;
cm.view.doc.iter(from, to, function(line) {
if (nextIntact && nextIntact.to == lineNo) nextIntact = intact.shift();
if (lineIsHidden(line)) {
if (line.height != 0) updateLineHeight(line, 0);
if (line.widgets && cur.previousSibling) for (var i = 0; i < line.widgets.length; ++i)
if (line.widgets[i].showIfHidden) {
var prev = cur.previousSibling;
if (prev.nodeType == "pre") {
var wrap = elt("div", null, null, "position: relative");
prev.parentNode.replaceChild(wrap, prev);
wrap.appendChild(prev);
prev = wrap;
}
prev.appendChild(buildLineWidget(line.widgets[i], prev, dims));
}
} else if (nextIntact && nextIntact.from <= lineNo && nextIntact.to > lineNo) {
// This line is intact. Skip to the actual node. Update its
// line number if needed.
while (cur.lineObj != line) cur = rm(cur);
if (lineNumbers && updateNumbersFrom <= lineNo && cur.lineNumber)
setTextContent(cur.lineNumber, lineNumberFor(cm.options, lineNo));
cur = cur.nextSibling;
} else {
// This line needs to be generated.
var lineNode = buildLineElement(cm, line, lineNo, dims);
container.insertBefore(lineNode, cur);
lineNode.lineObj = line;
}
++lineNo;
});
while (cur) cur = rm(cur);
}
function buildLineElement(cm, line, lineNo, dims) {
var lineElement = lineContent(cm, line);
var markers = line.gutterMarkers, display = cm.display;
if (!cm.options.lineNumbers && !markers && !line.bgClass && !line.wrapClass &&
(!line.widgets || !line.widgets.length)) return lineElement;
// Lines with gutter elements or a background class need
// to be wrapped again, and have the extra elements added
// to the wrapper div
var wrap = elt("div", null, line.wrapClass, "position: relative");
if (cm.options.lineNumbers || markers) {
var gutterWrap = wrap.appendChild(elt("div", null, null, "position: absolute; left: " +
(cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
if (cm.options.fixedGutter) wrap.alignable = [gutterWrap];
if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
wrap.lineNumber = gutterWrap.appendChild(
elt("div", lineNumberFor(cm.options, lineNo),
"CodeMirror-linenumber CodeMirror-gutter-elt",
"left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
+ display.lineNumInnerWidth + "px"));
if (markers)
for (var k = 0; k < cm.options.gutters.length; ++k) {
var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
if (found)
gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
}
}
// Kludge to make sure the styled element lies behind the selection (by z-index)
if (line.bgClass)
wrap.appendChild(elt("div", "\u00a0", line.bgClass + " CodeMirror-linebackground"));
wrap.appendChild(lineElement);
if (line.widgets) for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
var widget = ws[i], node = buildLineWidget(widget, wrap, dims);
if (widget.above)
wrap.insertBefore(node, cm.options.lineNumbers && line.height != 0 ? gutterWrap : lineElement);
else
wrap.appendChild(node);
}
if (ie_lt8) wrap.style.zIndex = 2;
return wrap;
}
function buildLineWidget(widget, wrap, dims) {
var node = elt("div", [widget.node], "CodeMirror-linewidget");
node.widget = widget;
if (widget.noHScroll) {
(wrap.alignable || (wrap.alignable = [])).push(node);
var width = dims.wrapperWidth;
node.style.left = dims.fixedPos + "px";
if (!widget.coverGutter) {
width -= dims.gutterTotalWidth;
node.style.paddingLeft = dims.gutterTotalWidth + "px";
}
node.style.width = width + "px";
}
if (widget.coverGutter) {
node.style.zIndex = 5;
node.style.position = "relative";
if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
}
return node;
}
// SELECTION / CURSOR
function updateSelection(cm) {
var display = cm.display;
var collapsed = posEq(cm.view.sel.from, cm.view.sel.to);
if (collapsed || cm.options.showCursorWhenSelecting)
updateSelectionCursor(cm);
else
display.cursor.style.display = display.otherCursor.style.display = "none";
if (!collapsed)
updateSelectionRange(cm);
else
display.selectionDiv.style.display = "none";
// Move the hidden textarea near the cursor to prevent scrolling artifacts
var headPos = cursorCoords(cm, cm.view.sel.head, "div");
var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
display.inputDiv.style.top = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
headPos.top + lineOff.top - wrapOff.top)) + "px";
display.inputDiv.style.left = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
headPos.left + lineOff.left - wrapOff.left)) + "px";
}
// No selection, plain cursor
function updateSelectionCursor(cm) {
var display = cm.display, pos = cursorCoords(cm, cm.view.sel.head, "div");
display.cursor.style.left = pos.left + "px";
display.cursor.style.top = pos.top + "px";
display.cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
display.cursor.style.display = "";
if (pos.other) {
display.otherCursor.style.display = "";
display.otherCursor.style.left = pos.other.left + "px";
display.otherCursor.style.top = pos.other.top + "px";
display.otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
} else { display.otherCursor.style.display = "none"; }
}
// Highlight selection
function updateSelectionRange(cm) {
var display = cm.display, doc = cm.view.doc, sel = cm.view.sel;
var fragment = document.createDocumentFragment();
var clientWidth = display.lineSpace.offsetWidth, pl = paddingLeft(cm.display);
function add(left, top, width, bottom) {
if (top < 0) top = 0;
fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
"px; top: " + top + "px; width: " + (width == null ? clientWidth - left : width) +
"px; height: " + (bottom - top) + "px"));
}
function drawForLine(line, fromArg, toArg, retTop) {
var lineObj = getLine(doc, line);
var lineLen = lineObj.text.length, rVal = retTop ? Infinity : -Infinity;
function coords(ch) {
return charCoords(cm, {line: line, ch: ch}, "div", lineObj);
}
iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
var leftPos = coords(dir == "rtl" ? to - 1 : from);
var rightPos = coords(dir == "rtl" ? from : to - 1);
var left = leftPos.left, right = rightPos.right;
if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
add(left, leftPos.top, null, leftPos.bottom);
left = pl;
if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
}
if (toArg == null && to == lineLen) right = clientWidth;
if (fromArg == null && from == 0) left = pl;
rVal = retTop ? Math.min(rightPos.top, rVal) : Math.max(rightPos.bottom, rVal);
if (left < pl + 1) left = pl;
add(left, rightPos.top, right - left, rightPos.bottom);
});
return rVal;
}
if (sel.from.line == sel.to.line) {
drawForLine(sel.from.line, sel.from.ch, sel.to.ch);
} else {
var fromObj = getLine(doc, sel.from.line);
var cur = fromObj, merged, path = [sel.from.line, sel.from.ch], singleLine;
while (merged = collapsedSpanAtEnd(cur)) {
var found = merged.find();
path.push(found.from.ch, found.to.line, found.to.ch);
if (found.to.line == sel.to.line) {
path.push(sel.to.ch);
singleLine = true;
break;
}
cur = getLine(doc, found.to.line);
}
// This is a single, merged line
if (singleLine) {
for (var i = 0; i < path.length; i += 3)
drawForLine(path[i], path[i+1], path[i+2]);
} else {
var middleTop, middleBot, toObj = getLine(doc, sel.to.line);
if (sel.from.ch)
// Draw the first line of selection.
middleTop = drawForLine(sel.from.line, sel.from.ch, null, false);
else
// Simply include it in the middle block.
middleTop = heightAtLine(cm, fromObj) - display.viewOffset;
if (!sel.to.ch)
middleBot = heightAtLine(cm, toObj) - display.viewOffset;
else
middleBot = drawForLine(sel.to.line, collapsedSpanAtStart(toObj) ? null : 0, sel.to.ch, true);
if (middleTop < middleBot) add(pl, middleTop, null, middleBot);
}
}
removeChildrenAndAdd(display.selectionDiv, fragment);
display.selectionDiv.style.display = "";
}
// Cursor-blinking
function restartBlink(cm) {
var display = cm.display;
clearInterval(display.blinker);
var on = true;
display.cursor.style.visibility = display.otherCursor.style.visibility = "";
display.blinker = setInterval(function() {
if (!display.cursor.offsetHeight) return;
display.cursor.style.visibility = display.otherCursor.style.visibility = (on = !on) ? "" : "hidden";
}, cm.options.cursorBlinkRate);
}
// HIGHLIGHT WORKER
function startWorker(cm, time) {
if (cm.view.mode.startState && cm.view.frontier < cm.display.showingTo)
cm.view.highlight.set(time, bind(highlightWorker, cm));
}
function highlightWorker(cm) {
var view = cm.view, doc = view.doc;
if (view.frontier >= cm.display.showingTo) return;
var end = +new Date + cm.options.workTime;
var state = copyState(view.mode, getStateBefore(cm, view.frontier));
var changed = [], prevChange;
doc.iter(view.frontier, Math.min(doc.size, cm.display.showingTo + 500), function(line) {
if (view.frontier >= cm.display.showingFrom) { // Visible
var oldStyles = line.styles;
line.styles = highlightLine(cm, line, state);
var ischange = !oldStyles || oldStyles.length != line.styles.length;
for (var i = 0; !ischange && i < oldStyles.length; ++i)
ischange = oldStyles[i] != line.styles[i];
if (ischange) {
if (prevChange && prevChange.end == view.frontier) prevChange.end++;
else changed.push(prevChange = {start: view.frontier, end: view.frontier + 1});
}
line.stateAfter = copyState(view.mode, state);
} else {
processLine(cm, line, state);
line.stateAfter = view.frontier % 5 == 0 ? copyState(view.mode, state) : null;
}
++view.frontier;
if (+new Date > end) {
startWorker(cm, cm.options.workDelay);
return true;
}
});
if (changed.length)
operation(cm, function() {
for (var i = 0; i < changed.length; ++i)
regChange(this, changed[i].start, changed[i].end);
})();
}
// 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(cm, n) {
var minindent, minline, doc = cm.view.doc;
for (var search = n, lim = n - 100; search > lim; --search) {
if (search == 0) return 0;
var line = getLine(doc, search-1);
if (line.stateAfter) return search;
var indented = countColumn(line.text, null, cm.options.tabSize);
if (minline == null || minindent > indented) {
minline = search - 1;
minindent = indented;
}
}
return minline;
}
function getStateBefore(cm, n) {
var view = cm.view;
if (!view.mode.startState) return true;
var pos = findStartLine(cm, n), state = pos && getLine(view.doc, pos-1).stateAfter;
if (!state) state = startState(view.mode);
else state = copyState(view.mode, state);
view.doc.iter(pos, n, function(line) {
processLine(cm, line, state);
var save = pos == n - 1 || pos % 5 == 0 || pos >= view.showingFrom && pos < view.showingTo;
line.stateAfter = save ? copyState(view.mode, state) : null;
++pos;
});
return state;
}
// POSITION MEASUREMENT
function paddingTop(display) {return display.lineSpace.offsetTop;}
function paddingLeft(display) {
var e = removeChildrenAndAdd(display.measure, elt("pre")).appendChild(elt("span", "x"));
return e.offsetLeft;
}
function measureChar(cm, line, ch, data) {
var dir = -1;
data = data || measureLine(cm, line);
for (var pos = ch;; pos += dir) {
var r = data[pos];
if (r) break;
if (dir < 0 && pos == 0) dir = 1;
}
return {left: pos < ch ? r.right : r.left,
right: pos > ch ? r.left : r.right,
top: r.top, bottom: r.bottom};
}
function measureLine(cm, line) {
// First look in the cache
var display = cm.display, cache = cm.display.measureLineCache;
for (var i = 0; i < cache.length; ++i) {
var memo = cache[i];
if (memo.text == line.text && memo.markedSpans == line.markedSpans &&
display.scroller.clientWidth == memo.width)
return memo.measure;
}
var measure = measureLineInner(cm, line);
// Store result in the cache
var memo = {text: line.text, width: display.scroller.clientWidth,
markedSpans: line.markedSpans, measure: measure};
if (cache.length == 16) cache[++display.measureLineCachePos % 16] = memo;
else cache.push(memo);
return measure;
}
function measureLineInner(cm, line) {
var display = cm.display, measure = emptyArray(line.text.length);
var pre = lineContent(cm, line, measure);
// IE does not cache element positions of inline elements between
// calls to getBoundingClientRect. This makes the loop below,
// which gathers the positions of all the characters on the line,
// do an amount of layout work quadratic to the number of
// characters. When line wrapping is off, we try to improve things
// by first subdividing the line into a bunch of inline blocks, so
// that IE can reuse most of the layout information from caches
// for those blocks. This does interfere with line wrapping, so it
// doesn't work when wrapping is on, but in that case the
// situation is slightly better, since IE does cache line-wrapping
// information and only recomputes per-line.
if (ie && !ie_lt8 && !cm.options.lineWrapping && pre.childNodes.length > 100) {
var fragment = document.createDocumentFragment();
var chunk = 10, n = pre.childNodes.length;
for (var i = 0, chunks = Math.ceil(n / chunk); i < chunks; ++i) {
var wrap = elt("div", null, null, "display: inline-block");
for (var j = 0; j < chunk && n; ++j) {
wrap.appendChild(pre.firstChild);
--n;
}
fragment.appendChild(wrap);
}
pre.appendChild(fragment);
}
removeChildrenAndAdd(display.measure, pre);
var outer = display.lineDiv.getBoundingClientRect();
var vranges = [], data = emptyArray(line.text.length), maxBot = pre.offsetHeight;
for (var i = 0, cur; i < measure.length; ++i) if (cur = measure[i]) {
var size = cur.getBoundingClientRect();
var top = Math.max(0, size.top - outer.top), bot = Math.min(size.bottom - outer.top, maxBot);
for (var j = 0; j < vranges.length; j += 2) {
var rtop = vranges[j], rbot = vranges[j+1];
if (rtop > bot || rbot < top) continue;
if (rtop <= top && rbot >= bot ||
top <= rtop && bot >= rbot ||
Math.min(bot, rbot) - Math.max(top, rtop) >= (bot - top) >> 1) {
vranges[j] = Math.min(top, rtop);
vranges[j+1] = Math.max(bot, rbot);
break;
}
}
if (j == vranges.length) vranges.push(top, bot);
data[i] = {left: size.left - outer.left, right: size.right - outer.left, top: j};
}
for (var i = 0, cur; i < data.length; ++i) if (cur = data[i]) {
var vr = cur.top;
cur.top = vranges[vr]; cur.bottom = vranges[vr+1];
}
return data;
}
function clearCaches(cm) {
cm.display.measureLineCache.length = cm.display.measureLineCachePos = 0;
cm.display.cachedCharWidth = cm.display.cachedTextHeight = null;
cm.view.maxLineChanged = true;
}
// Context is one of "line", "div" (display.lineDiv), "local"/null (editor), or "page"
function intoCoordSystem(cm, lineObj, rect, context) {
if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
var size = widgetHeight(lineObj.widgets[i]);
rect.top += size; rect.bottom += size;
}
if (context == "line") return rect;
if (!context) context = "local";
var yOff = heightAtLine(cm, lineObj);
if (context != "local") yOff -= cm.display.viewOffset;
if (context == "page") {
var lOff = cm.display.lineSpace.getBoundingClientRect();
yOff += lOff.top + (window.pageYOffset || (document.documentElement || document.body).scrollTop);
var xOff = lOff.left + (window.pageXOffset || (document.documentElement || document.body).scrollLeft);
rect.left += xOff; rect.right += xOff;
}
rect.top += yOff; rect.bottom += yOff;
return rect;
}
function charCoords(cm, pos, context, lineObj) {
if (!lineObj) lineObj = getLine(cm.view.doc, pos.line);
return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch), context);
}
function cursorCoords(cm, pos, context, lineObj, measurement) {
lineObj = lineObj || getLine(cm.view.doc, pos.line);
if (!measurement) measurement = measureLine(cm, lineObj);
function get(ch, right) {
var m = measureChar(cm, lineObj, ch, measurement);
if (right) m.left = m.right; else m.right = m.left;
return intoCoordSystem(cm, lineObj, m, context);
}
var order = getOrder(lineObj), ch = pos.ch;
if (!order) return get(ch);
var main, other, linedir = order[0].level;
for (var i = 0; i < order.length; ++i) {
var part = order[i], rtl = part.level % 2, nb, here;
if (part.from < ch && part.to > ch) return get(ch, rtl);
var left = rtl ? part.to : part.from, right = rtl ? part.from : part.to;
if (left == ch) {
// Opera and IE return bogus offsets and widths for edges
// where the direction flips, but only for the side with the
// lower level. So we try to use the side with the higher
// level.
if (i && part.level < (nb = order[i-1]).level) here = get(nb.level % 2 ? nb.from : nb.to - 1, true);
else here = get(rtl && part.from != part.to ? ch - 1 : ch);
if (rtl == linedir) main = here; else other = here;
} else if (right == ch) {
var nb = i < order.length - 1 && order[i+1];
if (!rtl && nb && nb.from == nb.to) continue;
if (nb && part.level < nb.level) here = get(nb.level % 2 ? nb.to - 1 : nb.from);
else here = get(rtl ? ch : ch - 1, true);
if (rtl == linedir) main = here; else other = here;
}
}
if (linedir && !ch) other = get(order[0].to - 1);
if (!main) return other;
if (other) main.other = other;
return main;
}
// Coords must be lineSpace-local
function coordsChar(cm, x, y) {
var doc = cm.view.doc;
y += cm.display.viewOffset;
if (y < 0) return {line: 0, ch: 0, outside: true};
var lineNo = lineAtHeight(doc, y);
if (lineNo >= doc.size) return {line: doc.size - 1, ch: getLine(doc, doc.size - 1).text.length};
if (x < 0) x = 0;
for (;;) {
var lineObj = getLine(doc, lineNo);
var found = coordsCharInner(cm, lineObj, lineNo, x, y);
var merged = collapsedSpanAtEnd(lineObj);
var mergedPos = merged && merged.find();
if (merged && found.ch >= mergedPos.from.ch)
lineNo = mergedPos.to.line;
else
return found;
}
}
function coordsCharInner(cm, lineObj, lineNo, x, y) {
var innerOff = y - heightAtLine(cm, lineObj);
var wrongLine = false, cWidth = cm.display.wrapper.clientWidth;
var measurement = measureLine(cm, lineObj);
function getX(ch) {
var sp = cursorCoords(cm, {line: lineNo, ch: ch}, "line",
lineObj, measurement);
wrongLine = true;
if (innerOff > sp.bottom) return Math.max(0, sp.left - cWidth);
else if (innerOff < sp.top) return sp.left + cWidth;
else wrongLine = false;
return sp.left;
}
var bidi = getOrder(lineObj), dist = lineObj.text.length;
var from = lineLeft(lineObj), to = lineRight(lineObj);
var fromX = paddingLeft(cm.display), toX = getX(to);
if (x > toX) return {line: lineNo, ch: to, outside: wrongLine};
// Do a binary search between these bounds.
for (;;) {
if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
var after = x - fromX < toX - x, ch = after ? from : to;
while (isExtendingChar.test(lineObj.text.charAt(ch))) ++ch;
return {line: lineNo, ch: ch, after: after, outside: wrongLine};
}
var step = Math.ceil(dist / 2), middle = from + step;
if (bidi) {
middle = from;
for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
}
var middleX = getX(middle);
if (middleX > x) {to = middle; toX = middleX; if (wrongLine) toX += 1000; dist -= step;}
else {from = middle; fromX = middleX; dist = step;}
}
}
var measureText;
function textHeight(display) {
if (display.cachedTextHeight != null) return display.cachedTextHeight;
if (measureText == null) {
measureText = elt("pre");
// Measure a bunch of lines, for browsers that compute
// fractional heights.
for (var i = 0; i < 49; ++i) {
measureText.appendChild(document.createTextNode("x"));
measureText.appendChild(elt("br"));
}
measureText.appendChild(document.createTextNode("x"));
}
removeChildrenAndAdd(display.measure, measureText);
var height = measureText.offsetHeight / 50;
if (height > 3) display.cachedTextHeight = height;
removeChildren(display.measure);
return height || 1;
}
function charWidth(display) {
if (display.cachedCharWidth != null) return display.cachedCharWidth;
var anchor = elt("span", "x");
var pre = elt("pre", [anchor]);
removeChildrenAndAdd(display.measure, pre);
var width = anchor.offsetWidth;
if (width > 2) display.cachedCharWidth = width;
return width || 10;
}
// OPERATIONS
// 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(cm) {
if (cm.curOp) ++cm.curOp.depth;
else cm.curOp = {
// Nested operations delay update until the outermost one
// finishes.
depth: 1,
// An array of ranges of lines that have to be updated. See
// updateDisplay.
changes: [],
delayedCallbacks: [],
updateInput: null,
userSelChange: null,
textChanged: null,
selectionChanged: false,
updateMaxLine: false,
id: ++cm.nextOpId
};
}
function endOperation(cm) {
var op = cm.curOp;
if (--op.depth) return;
cm.curOp = null;
var view = cm.view, display = cm.display;
if (op.updateMaxLine) computeMaxLength(view);
if (view.maxLineChanged && !cm.options.lineWrapping) {
var width = measureChar(cm, view.maxLine, view.maxLine.text.length).right;
display.sizer.style.minWidth = (width + 3 + scrollerCutOff) + "px";
view.maxLineChanged = false;
var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + display.sizer.offsetWidth - display.scroller.clientWidth);
if (maxScrollLeft < view.scrollLeft)
setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true);
}
var newScrollPos, updated;
if (op.selectionChanged) {
var coords = cursorCoords(cm, view.sel.head);
newScrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom);
}
if (op.changes.length || newScrollPos && newScrollPos.scrollTop != null)
updated = updateDisplay(cm, op.changes, newScrollPos && newScrollPos.scrollTop);
if (!updated && op.selectionChanged) updateSelection(cm);
if (newScrollPos) scrollCursorIntoView(cm);
if (op.selectionChanged) restartBlink(cm);
if (view.focused && op.updateInput)
resetInput(cm, op.userSelChange);
if (op.textChanged)
signal(cm, "change", cm, op.textChanged);
if (op.selectionChanged) signal(cm, "cursorActivity", cm);
for (var i = 0; i < op.delayedCallbacks.length; ++i) op.delayedCallbacks[i](cm);
}
// Wraps a function in an operation. Returns the wrapped function.
function operation(cm1, f) {
return function() {
var cm = cm1 || this;
startOperation(cm);
try {var result = f.apply(cm, arguments);}
finally {endOperation(cm);}
return result;
};
}
function regChange(cm, from, to, lendiff) {
cm.curOp.changes.push({from: from, to: to, diff: lendiff});
}
// INPUT HANDLING
function slowPoll(cm) {
if (cm.view.pollingFast) return;
cm.display.poll.set(cm.options.pollInterval, function() {
readInput(cm);
if (cm.view.focused) slowPoll(cm);
});
}
function fastPoll(cm) {
var missed = false;
cm.display.pollingFast = true;
function p() {
var changed = readInput(cm);
if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);}
else {cm.display.pollingFast = false; slowPoll(cm);}
}
cm.display.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.)
function readInput(cm) {
var input = cm.display.input, prevInput = cm.display.prevInput, view = cm.view, sel = view.sel;
if (!view.focused || hasSelection(input) || isReadOnly(cm)) return false;
var text = input.value;
if (text == prevInput && posEq(sel.from, sel.to)) return false;
startOperation(cm);
view.sel.shift = false;
var same = 0, l = Math.min(prevInput.length, text.length);
while (same < l && prevInput[same] == text[same]) ++same;
var from = sel.from, to = sel.to;
if (same < prevInput.length)
from = {line: from.line, ch: from.ch - (prevInput.length - same)};
else if (view.overwrite && posEq(from, to) && !cm.display.pasteIncoming)
to = {line: to.line, ch: Math.min(getLine(cm.view.doc, to.line).text.length, to.ch + (text.length - same))};
var updateInput = cm.curOp.updateInput;
updateDoc(cm, from, to, splitLines(text.slice(same)), "end",
cm.display.pasteIncoming ? "paste" : "input", {from: from, to: to});
cm.curOp.updateInput = updateInput;
if (text.length > 1000) input.value = cm.display.prevInput = "";
else cm.display.prevInput = text;
endOperation(cm);
cm.display.pasteIncoming = false;
return true;
}
function resetInput(cm, user) {
var view = cm.view, minimal, selected;
if (!posEq(view.sel.from, view.sel.to)) {
cm.display.prevInput = "";
minimal = hasCopyEvent &&
(view.sel.to.line - view.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000);
if (minimal) cm.display.input.value = "-";
else cm.display.input.value = selected || cm.getSelection();
if (view.focused) selectInput(cm.display.input);
} else if (user) cm.display.prevInput = cm.display.input.value = "";
cm.display.inaccurateSelection = minimal;
}
function focusInput(cm) {
if (cm.options.readOnly != "nocursor" && (ie || document.activeElement != cm.display.input))
cm.display.input.focus();
}
function isReadOnly(cm) {
return cm.options.readOnly || cm.view.cantEdit;
}
// EVENT HANDLERS
function registerEventHandlers(cm) {
var d = cm.display;
on(d.scroller, "mousedown", operation(cm, onMouseDown));
on(d.scroller, "dblclick", operation(cm, e_preventDefault));
on(d.lineSpace, "selectstart", function(e) {
if (!eventInWidget(d, e)) e_preventDefault(e);
});
// 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) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
on(d.scroller, "scroll", function() {
setScrollTop(cm, d.scroller.scrollTop);
setScrollLeft(cm, d.scroller.scrollLeft, true);
signal(cm, "scroll", cm);
});
on(d.scrollbarV, "scroll", function() {
setScrollTop(cm, d.scrollbarV.scrollTop);
});
on(d.scrollbarH, "scroll", function() {
setScrollLeft(cm, d.scrollbarH.scrollLeft);
});
on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
function reFocus() { if (cm.view.focused) setTimeout(bind(focusInput, cm), 0); }
on(d.scrollbarH, "mousedown", reFocus);
on(d.scrollbarV, "mousedown", reFocus);
// Prevent wrapper from ever scrolling
on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
on(window, "resize", function resizeHandler() {
// Might be a text scaling operation, clear size caches.
d.cachedCharWidth = d.cachedTextHeight = null;
clearCaches(cm);
if (d.wrapper.parentNode) updateDisplay(cm, true);
else off(window, "resize", resizeHandler);
});
on(d.input, "keyup", operation(cm, function(e) {
if (cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
if (e_prop(e, "keyCode") == 16) cm.view.sel.shift = false;
}));
on(d.input, "input", bind(fastPoll, cm));
on(d.input, "keydown", operation(cm, onKeyDown));
on(d.input, "keypress", operation(cm, onKeyPress));
on(d.input, "focus", bind(onFocus, cm));
on(d.input, "blur", bind(onBlur, cm));
function drag_(e) {
if (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return;
e_stop(e);
}
if (cm.options.dragDrop) {
on(d.scroller, "dragstart", function(e){onDragStart(cm, e);});
on(d.scroller, "dragenter", drag_);
on(d.scroller, "dragover", drag_);
on(d.scroller, "drop", operation(cm, onDrop));
}
on(d.scroller, "paste", function(e){
if (eventInWidget(d, e)) return;
focusInput(cm);
fastPoll(cm);
});
on(d.input, "paste", function() {
d.pasteIncoming = true;
fastPoll(cm);
});
function prepareCopy() {
if (d.inaccurateSelection) {
d.prevInput = "";
d.inaccurateSelection = false;
d.input.value = cm.getSelection();
selectInput(d.input);
}
}
on(d.input, "cut", prepareCopy);
on(d.input, "copy", prepareCopy);
// Needed to handle Tab key in KHTML
if (khtml) on(d.sizer, "mouseup", function() {
if (document.activeElement == d.input) d.input.blur();
focusInput(cm);
});
}
function eventInWidget(display, e) {
for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
if (!n) return true;
if (/\bCodeMirror-(?:line)?widget\b/.test(n.className) ||
n.parentNode == display.sizer && n != display.mover) return true;
}
}
function posFromMouse(cm, e, liberal) {
var display = cm.display;
if (!liberal) {
var target = e_target(e);
if (target == display.scrollbarH || target == display.scrollbarH.firstChild ||
target == display.scrollbarV || target == display.scrollbarV.firstChild ||
target == display.scrollbarFiller) return null;
}
var x, y, space = display.lineSpace.getBoundingClientRect();
// Fails unpredictably on IE[67] when mouse is dragged around quickly.
try { x = e.clientX; y = e.clientY; } catch (e) { return null; }
return coordsChar(cm, x - space.left, y - space.top);
}
var lastClick, lastDoubleClick;
function onMouseDown(e) {
var cm = this, display = cm.display, view = cm.view, sel = view.sel, doc = view.doc;
sel.shift = e_prop(e, "shiftKey");
if (eventInWidget(display, e)) {
if (!webkit) {
display.scroller.draggable = false;
setTimeout(function(){display.scroller.draggable = true;}, 100);
}
return;
}
if (clickInGutter(cm, e)) return;
var start = posFromMouse(cm, e);
switch (e_button(e)) {
case 3:
if (gecko) onContextMenu.call(cm, cm, e);
return;
case 2:
if (start) extendSelection(cm, start);
setTimeout(bind(focusInput, cm), 20);
e_preventDefault(e);
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) == display.scroller) e_preventDefault(e); return;}
if (!view.focused) onFocus(cm);
var now = +new Date, type = "single";
if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {
type = "triple";
e_preventDefault(e);
setTimeout(bind(focusInput, cm), 20);
selectLine(cm, start.line);
} else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {
type = "double";
lastDoubleClick = {time: now, pos: start};
e_preventDefault(e);
var word = findWordAt(getLine(doc, start.line).text, start);
extendSelection(cm, word.from, word.to);
} else { lastClick = {time: now, pos: start}; }
var last = start;
if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) && !posEq(sel.from, sel.to) &&
!posLess(start, sel.from) && !posLess(sel.to, start) && type == "single") {
var dragEnd = operation(cm, function(e2) {
if (webkit) display.scroller.draggable = false;
view.draggingText = false;
off(document, "mouseup", dragEnd);
off(display.scroller, "drop", dragEnd);
if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
e_preventDefault(e2);
extendSelection(cm, start);
focusInput(cm);
}
});
// Let the drag handler handle this.
if (webkit) display.scroller.draggable = true;
view.draggingText = dragEnd;
// IE's approach to draggable
if (display.scroller.dragDrop) display.scroller.dragDrop();
on(document, "mouseup", dragEnd);
on(display.scroller, "drop", dragEnd);
return;
}
e_preventDefault(e);
if (type == "single") extendSelection(cm, clipPos(doc, start));
var startstart = sel.from, startend = sel.to;
function doSelect(cur) {
if (type == "single") {
extendSelection(cm, clipPos(doc, start), cur);
return;
}
startstart = clipPos(doc, startstart);
startend = clipPos(doc, startend);
if (type == "double") {
var word = findWordAt(getLine(doc, cur.line).text, cur);
if (posLess(cur, startstart)) extendSelection(cm, word.from, startend);
else extendSelection(cm, startstart, word.to);
} else if (type == "triple") {
if (posLess(cur, startstart)) extendSelection(cm, startend, clipPos(doc, {line: cur.line, ch: 0}));
else extendSelection(cm, startstart, clipPos(doc, {line: cur.line + 1, ch: 0}));
}
}
var editorSize = display.wrapper.getBoundingClientRect();
// Used to ensure timeout re-tries don't fire when another extend
// happened in the meantime (clearTimeout isn't reliable -- at
// least on Chrome, the timeouts still happen even when cleared,
// if the clear happens after their scheduled firing time).
var counter = 0;
function extend(e) {
var curCount = ++counter;
var cur = posFromMouse(cm, e, true);
if (!cur) return;
if (!posEq(cur, last)) {
if (!view.focused) onFocus(cm);
last = cur;
doSelect(cur);
var visible = visibleLines(display, doc);
if (cur.line >= visible.to || cur.line < visible.from)
setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
} else {
var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
if (outside) setTimeout(operation(cm, function() {
if (counter != curCount) return;
display.scroller.scrollTop += outside;
extend(e);
}), 50);
}
}
function done(e) {
counter = Infinity;
var cur = posFromMouse(cm, e);
if (cur) doSelect(cur);
e_preventDefault(e);
focusInput(cm);
off(document, "mousemove", move);
off(document, "mouseup", up);
}
var move = operation(cm, function(e) {
if (!ie && !e_button(e)) done(e);
else extend(e);
});
var up = operation(cm, done);
on(document, "mousemove", move);
on(document, "mouseup", up);
}
function onDrop(e) {
var cm = this;
if (eventInWidget(cm.display, e) || (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))))
return;
e_preventDefault(e);
var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
if (!pos || isReadOnly(cm)) return;
if (files && files.length && window.FileReader && window.File) {
var n = files.length, text = Array(n), read = 0;
var loadFile = function(file, i) {
var reader = new FileReader;
reader.onload = function() {
text[i] = reader.result;
if (++read == n) {
pos = clipPos(cm.view.doc, pos);
operation(cm, function() {
var end = replaceRange(cm, text.join(""), pos, pos, "paste");
setSelection(cm, pos, end);
})();
}
};
reader.readAsText(file);
};
for (var i = 0; i < n; ++i) loadFile(files[i], i);
} else {
// Don't do a replace if the drop happened inside of the selected text.
if (cm.view.draggingText && !(posLess(pos, cm.view.sel.from) || posLess(cm.view.sel.to, pos))) {
cm.view.draggingText(e);
// Ensure the editor is re-focused
setTimeout(bind(focusInput, cm), 20);
return;
}
try {
var text = e.dataTransfer.getData("Text");
if (text) {
var curFrom = cm.view.sel.from, curTo = cm.view.sel.to;
setSelection(cm, pos, pos);
if (cm.view.draggingText) replaceRange(cm, "", curFrom, curTo, "paste");
cm.replaceSelection(text, null, "paste");
focusInput(cm);
onFocus(cm);
}
}
catch(e){}
}
}
function clickInGutter(cm, e) {
var display = cm.display;
try { var mX = e.clientX, mY = e.clientY; }
catch(e) { return false; }
if (mX >= Math.floor(display.gutters.getBoundingClientRect().right)) return false;
e_preventDefault(e);
if (!hasHandler(cm, "gutterClick")) return true;
var lineBox = display.lineDiv.getBoundingClientRect();
if (mY > lineBox.bottom) return true;
mY -= lineBox.top - display.viewOffset;
for (var i = 0; i < cm.options.gutters.length; ++i) {
var g = display.gutters.childNodes[i];
if (g && g.getBoundingClientRect().right >= mX) {
var line = lineAtHeight(cm.view.doc, mY);
var gutter = cm.options.gutters[i];
signalLater(cm, cm, "gutterClick", cm, line, gutter, e);
break;
}
}
return true;
}
function onDragStart(cm, e) {
if (eventInWidget(cm.display, e)) return;
var txt = cm.getSelection();
e.dataTransfer.setData("Text", txt);
// Use dummy image instead of default browsers image.
// Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
if (e.dataTransfer.setDragImage && !safari) {
var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
if (opera) {
img.width = img.height = 1;
cm.display.wrapper.appendChild(img);
// Force a relayout, or Opera won't use our image for some obscure reason
img._top = img.offsetTop;
}
e.dataTransfer.setDragImage(img, 0, 0);
if (opera) img.parentNode.removeChild(img);
}
}
function setScrollTop(cm, val) {
if (Math.abs(cm.view.scrollTop - val) < 2) return;
cm.view.scrollTop = val;
if (!gecko) updateDisplay(cm, [], val);
if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val;
if (gecko) updateDisplay(cm, []);
}
function setScrollLeft(cm, val, isScroller) {
if (isScroller ? val == cm.view.scrollLeft : Math.abs(cm.view.scrollLeft - val) < 2) return;
val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
cm.view.scrollLeft = val;
alignHorizontally(cm);
if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val;
}
// Since the delta values reported on mouse wheel events are
// unstandardized between browsers and even browser versions, and
// generally horribly unpredictable, this code starts by measuring
// the scroll effect that the first few mouse wheel events have,
// and, from that, detects the way it can convert deltas to pixel
// offsets afterwards.
//
// The reason we want to know the amount a wheel event will scroll
// is that it gives us a chance to update the display before the
// actual scrolling happens, reducing flickering.
var wheelSamples = 0, wheelPixelsPerUnit = null;
// Fill in a browser-detected starting value on browsers where we
// know one. These don't have to be accurate -- the result of them
// being wrong would just be a slight flicker on the first wheel
// scroll (if it is large enough).
if (ie) wheelPixelsPerUnit = -.53;
else if (gecko) wheelPixelsPerUnit = 15;
else if (chrome) wheelPixelsPerUnit = -.7;
else if (safari) wheelPixelsPerUnit = -1/3;
function onScrollWheel(cm, e) {
var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
else if (dy == null) dy = e.wheelDelta;
// Webkit browsers on OS X abort momentum scrolls when the target
// of the scroll event is removed from the scrollable element.
// This hack (see related code in patchDisplay) makes sure the
// element is kept around.
if (dy && mac && webkit) {
for (var cur = e.target; cur != scroll; cur = cur.parentNode) {
if (cur.lineObj) {
cm.display.currentWheelTarget = cur;
break;
}
}
}
var display = cm.display, scroll = display.scroller;
// On some browsers, horizontal scrolling will cause redraws to
// happen before the gutter has been realigned, causing it to
// wriggle around in a most unseemly way. When we have an
// estimated pixels/delta value, we just handle horizontal
// scrolling entirely here. It'll be slightly off from native, but
// better than glitching out.
if (dx && !gecko && !opera && wheelPixelsPerUnit != null) {
if (dy)
setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
e_preventDefault(e);
display.wheelStartX = null; // Abort measurement, if in progress
return;
}
if (dy && wheelPixelsPerUnit != null) {
var pixels = dy * wheelPixelsPerUnit;
var top = cm.view.scrollTop, bot = top + display.wrapper.clientHeight;
if (pixels < 0) top = Math.max(0, top + pixels - 50);
else bot = Math.min(cm.view.doc.height, bot + pixels + 50);
updateDisplay(cm, [], {top: top, bottom: bot});
}
if (wheelSamples < 20) {
if (display.wheelStartX == null) {
display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
display.wheelDX = dx; display.wheelDY = dy;
setTimeout(function() {
if (display.wheelStartX == null) return;
var movedX = scroll.scrollLeft - display.wheelStartX;
var movedY = scroll.scrollTop - display.wheelStartY;
var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
(movedX && display.wheelDX && movedX / display.wheelDX);
display.wheelStartX = display.wheelStartY = null;
if (!sample) return;
wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
++wheelSamples;
}, 200);
} else {
display.wheelDX += dx; display.wheelDY += dy;
}
}
}
function doHandleBinding(cm, bound, dropShift) {
if (typeof bound == "string") {
bound = commands[bound];
if (!bound) return false;
}
// Ensure previous input has been read, so that the handler sees a
// consistent view of the document
if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false;
var view = cm.view, prevShift = view.sel.shift;
try {
if (isReadOnly(cm)) view.suppressEdits = true;
if (dropShift) view.sel.shift = false;
bound(cm);
} catch(e) {
if (e != Pass) throw e;
return false;
} finally {
view.sel.shift = prevShift;
view.suppressEdits = false;
}
return true;
}
function allKeyMaps(cm) {
var maps = cm.view.keyMaps.slice(0);
maps.push(cm.options.keyMap);
if (cm.options.extraKeys) maps.unshift(cm.options.extraKeys);
return maps;
}
var maybeTransition;
function handleKeyBinding(cm, e) {
// Handle auto keymap transitions
var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto;
clearTimeout(maybeTransition);
if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
if (getKeyMap(cm.options.keyMap) == startMap)
cm.options.keyMap = (next.call ? next.call(null, cm) : 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, flipCtrlCmd ? "metaKey" : "ctrlKey")) name = "Ctrl-" + name;
if (e_prop(e, flipCtrlCmd ? "ctrlKey" : "metaKey")) name = "Cmd-" + name;
var stopped = false;
function stop() { stopped = true; }
var keymaps = allKeyMaps(cm);
if (e_prop(e, "shiftKey")) {
handled = lookupKey("Shift-" + name, keymaps,
function(b) {return doHandleBinding(cm, b, true);}, stop)
|| lookupKey(name, keymaps, function(b) {
if (typeof b == "string" && /^go[A-Z]/.test(b)) return doHandleBinding(cm, b);
}, stop);
} else {
handled = lookupKey(name, keymaps,
function(b) { return doHandleBinding(cm, b); }, stop);
}
if (stopped) handled = false;
if (handled) {
e_preventDefault(e);
restartBlink(cm);
if (ie_lt9) { e.oldKeyCode = e.keyCode; e.keyCode = 0; }
}
return handled;
}
function handleCharBinding(cm, e, ch) {
var handled = lookupKey("'" + ch + "'", allKeyMaps(cm),
function(b) { return doHandleBinding(cm, b, true); });
if (handled) {
e_preventDefault(e);
restartBlink(cm);
}
return handled;
}
var lastStoppedKey = null;
function onKeyDown(e) {
var cm = this;
if (!cm.view.focused) onFocus(cm);
if (ie && e.keyCode == 27) { e.returnValue = false; }
if (cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
var code = e_prop(e, "keyCode");
// IE does strange things with escape.
cm.view.sel.shift = code == 16 || e_prop(e, "shiftKey");
// First give onKeyEvent option a chance to handle this.
var handled = handleKeyBinding(cm, e);
if (opera) {
lastStoppedKey = handled ? code : null;
// Opera has no cut event... we try to at least catch the key combo
if (!handled && code == 88 && !hasCopyEvent && e_prop(e, mac ? "metaKey" : "ctrlKey"))
cm.replaceSelection("");
}
}
function onKeyPress(e) {
var cm = this;
if (cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
var keyCode = e_prop(e, "keyCode"), charCode = e_prop(e, "charCode");
if (opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
if (((opera && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return;
var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
if (this.options.electricChars && this.view.mode.electricChars &&
this.options.smartIndent && !isReadOnly(this) &&
this.view.mode.electricChars.indexOf(ch) > -1)
setTimeout(operation(cm, function() {indentLine(cm, cm.view.sel.to.line, "smart");}), 75);
if (handleCharBinding(cm, e, ch)) return;
fastPoll(cm);
}
function onFocus(cm) {
if (cm.options.readOnly == "nocursor") return;
if (!cm.view.focused) {
signal(cm, "focus", cm);
cm.view.focused = true;
if (cm.display.scroller.className.search(/\bCodeMirror-focused\b/) == -1)
cm.display.scroller.className += " CodeMirror-focused";
resetInput(cm, true);
}
slowPoll(cm);
restartBlink(cm);
}
function onBlur(cm) {
if (cm.view.focused) {
signal(cm, "blur", cm);
cm.view.focused = false;
cm.display.scroller.className = cm.display.scroller.className.replace(" CodeMirror-focused", "");
}
clearInterval(cm.display.blinker);
setTimeout(function() {if (!cm.view.focused) cm.view.sel.shift = false;}, 150);
}
var detectingSelectAll;
function onContextMenu(cm, e) {
var display = cm.display;
if (eventInWidget(display, e)) return;
var sel = cm.view.sel;
var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
if (!pos || opera) return; // Opera is difficult.
if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))
operation(cm, setSelection)(cm, pos, pos);
var oldCSS = display.input.style.cssText;
display.inputDiv.style.position = "absolute";
display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
"px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: white; outline: none;" +
"border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
focusInput(cm);
resetInput(cm, true);
// Adds "Select all" to context menu in FF
if (posEq(sel.from, sel.to)) display.input.value = display.prevInput = " ";
function rehide() {
display.inputDiv.style.position = "relative";
display.input.style.cssText = oldCSS;
if (ie_lt9) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
slowPoll(cm);
// Try to detect the user choosing select-all
if (display.input.selectionStart != null) {
clearTimeout(detectingSelectAll);
var extval = display.input.value = " " + (posEq(sel.from, sel.to) ? "" : display.input.value), i = 0;
display.prevInput = " ";
display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
detectingSelectAll = setTimeout(function poll(){
if (display.prevInput == " " && display.input.selectionStart == 0)
operation(cm, commands.selectAll)(cm);
else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
else resetInput(cm);
}, 200);
}
}
if (gecko) {
e_stop(e);
on(window, "mouseup", function mouseup() {
off(window, "mouseup", mouseup);
setTimeout(rehide, 20);
});
} else {
setTimeout(rehide, 50);
}
}
// UPDATING
// Replace the range from from to to by the strings in newText.
// Afterwards, set the selection to selFrom, selTo.
function updateDoc(cm, from, to, newText, selUpdate, origin) {
// Possibly split or suppress the update based on the presence
// of read-only spans in its range.
var split = sawReadOnlySpans &&
removeReadOnlyRanges(cm.view.doc, from, to);
if (split) {
for (var i = split.length - 1; i >= 1; --i)
updateDocInner(cm, split[i].from, split[i].to, [""], origin);
if (split.length)
return updateDocInner(cm, split[0].from, split[0].to, newText, selUpdate, origin);
} else {
return updateDocInner(cm, from, to, newText, selUpdate, origin);
}
}
function updateDocInner(cm, from, to, newText, selUpdate, origin) {
if (cm.view.suppressEdits) return;
var view = cm.view, doc = view.doc, old = [];
doc.iter(from.line, to.line + 1, function(line) {
old.push(newHL(line.text, line.markedSpans));
});
var startSelFrom = view.sel.from, startSelTo = view.sel.to;
var lines = updateMarkedSpans(hlSpans(old[0]), hlSpans(lst(old)), from.ch, to.ch, newText);
var retval = updateDocNoUndo(cm, from, to, lines, selUpdate, origin);
if (view.history) addChange(cm, from.line, newText.length, old, origin,
startSelFrom, startSelTo, view.sel.from, view.sel.to);
return retval;
}
function unredoHelper(cm, type) {
var doc = cm.view.doc, hist = cm.view.history;
var set = (type == "undo" ? hist.done : hist.undone).pop();
if (!set) return;
var anti = {events: [], fromBefore: set.fromAfter, toBefore: set.toAfter,
fromAfter: set.fromBefore, toAfter: set.toBefore};
for (var i = set.events.length - 1; i >= 0; i -= 1) {
hist.dirtyCounter += type == "undo" ? -1 : 1;
var change = set.events[i];
var replaced = [], end = change.start + change.added;
doc.iter(change.start, end, function(line) { replaced.push(newHL(line.text, line.markedSpans)); });
anti.events.push({start: change.start, added: change.old.length, old: replaced});
var selPos = i ? null : {from: set.fromBefore, to: set.toBefore};
updateDocNoUndo(cm, {line: change.start, ch: 0}, {line: end - 1, ch: getLine(doc, end-1).text.length},
change.old, selPos, type);
}
(type == "undo" ? hist.undone : hist.done).push(anti);
}
function updateDocNoUndo(cm, from, to, lines, selUpdate, origin) {
var view = cm.view, doc = view.doc, display = cm.display;
if (view.suppressEdits) return;
var nlines = to.line - from.line, firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
var recomputeMaxLength = false, checkWidthStart = from.line;
if (!cm.options.lineWrapping) {
checkWidthStart = lineNo(visualLine(doc, firstLine));
doc.iter(checkWidthStart, to.line + 1, function(line) {
if (line == view.maxLine) {
recomputeMaxLength = true;
return true;
}
});
}
var lastHL = lst(lines), th = textHeight(display);
// First adjust the line structure
if (from.ch == 0 && to.ch == 0 && hlText(lastHL) == "") {
// This is a whole-line replace. Treated specially to make
// sure line objects move the way they are supposed to.
var added = [];
for (var i = 0, e = lines.length - 1; i < e; ++i)
added.push(makeLine(hlText(lines[i]), hlSpans(lines[i]), th));
updateLine(cm, lastLine, lastLine.text, hlSpans(lastHL));
if (nlines) doc.remove(from.line, nlines, cm);
if (added.length) doc.insert(from.line, added);
} else if (firstLine == lastLine) {
if (lines.length == 1) {
updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]) +
firstLine.text.slice(to.ch), hlSpans(lines[0]));
} else {
for (var added = [], i = 1, e = lines.length - 1; i < e; ++i)
added.push(makeLine(hlText(lines[i]), hlSpans(lines[i]), th));
added.push(makeLine(hlText(lastHL) + firstLine.text.slice(to.ch), hlSpans(lastHL), th));
updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]), hlSpans(lines[0]));
doc.insert(from.line + 1, added);
}
} else if (lines.length == 1) {
updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]) +
lastLine.text.slice(to.ch), hlSpans(lines[0]));
doc.remove(from.line + 1, nlines, cm);
} else {
var added = [];
updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]), hlSpans(lines[0]));
updateLine(cm, lastLine, hlText(lastHL) + lastLine.text.slice(to.ch), hlSpans(lastHL));
for (var i = 1, e = lines.length - 1; i < e; ++i)
added.push(makeLine(hlText(lines[i]), hlSpans(lines[i]), th));
if (nlines > 1) doc.remove(from.line + 1, nlines - 1, cm);
doc.insert(from.line + 1, added);
}
if (cm.options.lineWrapping) {
var perLine = Math.max(5, display.scroller.clientWidth / charWidth(display) - 3);
doc.iter(from.line, from.line + lines.length, function(line) {
if (line.height == 0) return;
var guess = (Math.ceil(line.text.length / perLine) || 1) * th;
if (guess != line.height) updateLineHeight(line, guess);
});
} else {
doc.iter(checkWidthStart, from.line + lines.length, function(line) {
var len = lineLength(doc, line);
if (len > view.maxLineLength) {
view.maxLine = line;
view.maxLineLength = len;
view.maxLineChanged = true;
recomputeMaxLength = false;
}
});
if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
}
// Adjust frontier, schedule worker
view.frontier = Math.min(view.frontier, from.line);
startWorker(cm, 400);
var lendiff = lines.length - nlines - 1;
// Remember that these lines changed, for updating the display
regChange(cm, from.line, to.line + 1, lendiff);
if (hasHandler(cm, "change")) {
// Normalize lines to contain only strings, since that's what
// the change event handler expects
for (var i = 0; i < lines.length; ++i)
if (typeof lines[i] != "string") lines[i] = lines[i].text;
var changeObj = {from: from, to: to, text: lines, origin: origin};
if (cm.curOp.textChanged) {
for (var cur = cm.curOp.textChanged; cur.next; cur = cur.next) {}
cur.next = changeObj;
} else cm.curOp.textChanged = changeObj;
}
// Update the selection
var newSelFrom, newSelTo, end = {line: from.line + lines.length - 1,
ch: hlText(lastHL).length + (lines.length == 1 ? from.ch : 0)};
if (selUpdate && typeof selUpdate != "string") {
if (selUpdate.from) { newSelFrom = selUpdate.from; newSelTo = selUpdate.to; }
else newSelFrom = newSelTo = selUpdate;
} else if (selUpdate == "end") {
newSelFrom = newSelTo = end;
} else if (selUpdate == "start") {
newSelFrom = newSelTo = from;
} else if (selUpdate == "around") {
newSelFrom = from; newSelTo = end;
} else {
var adjustPos = function(pos) {
if (posLess(pos, from)) return pos;
if (!posLess(to, pos)) return end;
var line = pos.line + lendiff;
var ch = pos.ch;
if (pos.line == to.line)
ch += hlText(lastHL).length - (to.ch - (to.line == from.line ? from.ch : 0));
return {line: line, ch: ch};
};
newSelFrom = adjustPos(view.sel.from);
newSelTo = adjustPos(view.sel.to);
}
setSelection(cm, newSelFrom, newSelTo, null, true);
return end;
}
function replaceRange(cm, code, from, to, origin) {
if (!to) to = from;
if (posLess(to, from)) { var tmp = to; to = from; from = tmp; }
return updateDoc(cm, from, to, splitLines(code), null, origin);
}
// SELECTION
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 clipLine(doc, n) {return Math.max(0, Math.min(n, doc.size-1));}
function clipPos(doc, pos) {
if (pos.line < 0) return {line: 0, ch: 0};
if (pos.line >= doc.size) return {line: doc.size-1, ch: getLine(doc, doc.size-1).text.length};
var ch = pos.ch, linelen = getLine(doc, 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 isLine(doc, l) {return l >= 0 && l < doc.size;}
// If shift is held, this will move the selection anchor. Otherwise,
// it'll set the whole selection.
function extendSelection(cm, pos, other, bias) {
var sel = cm.view.sel;
if (sel.shift || sel.extend) {
var anchor = sel.anchor;
if (other) {
var posBefore = posLess(pos, anchor);
if (posBefore != posLess(other, anchor)) {
anchor = pos;
pos = other;
} else if (posBefore != posLess(pos, other)) {
pos = other;
}
}
setSelection(cm, anchor, pos, bias);
} else {
setSelection(cm, pos, other || pos, bias);
}
cm.curOp.userSelChange = true;
}
// Update the selection. Last two args are only used by
// updateDoc, since they have to be expressed in the line
// numbers before the update.
function setSelection(cm, anchor, head, bias, checkAtomic) {
cm.view.goalColumn = null;
var sel = cm.view.sel;
// Skip over atomic spans.
if (checkAtomic || !posEq(anchor, sel.anchor))
anchor = skipAtomic(cm, anchor, bias, checkAtomic != "push");
if (checkAtomic || !posEq(head, sel.head))
head = skipAtomic(cm, head, bias, checkAtomic != "push");
if (posEq(sel.anchor, anchor) && posEq(sel.head, head)) return;
sel.anchor = anchor; sel.head = head;
var inv = posLess(head, anchor);
sel.from = inv ? head : anchor;
sel.to = inv ? anchor : head;
cm.curOp.updateInput = true;
cm.curOp.selectionChanged = true;
}
function reCheckSelection(cm) {
setSelection(cm, cm.view.sel.from, cm.view.sel.to, null, "push");
}
function skipAtomic(cm, pos, bias, mayClear) {
var doc = cm.view.doc, flipped = false, curPos = pos;
var dir = bias || 1;
cm.view.cantEdit = false;
search: for (;;) {
var line = getLine(doc, curPos.line), toClear;
if (line.markedSpans) {
for (var i = 0; i < line.markedSpans.length; ++i) {
var sp = line.markedSpans[i], m = sp.marker;
if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
(sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
if (mayClear && m.clearOnEnter) {
(toClear || (toClear = [])).push(m);
continue;
} else if (!m.atomic) continue;
var newPos = m.find()[dir < 0 ? "from" : "to"];
if (posEq(newPos, curPos)) {
newPos.ch += dir;
if (newPos.ch < 0) {
if (newPos.line) newPos = clipPos(doc, {line: newPos.line - 1});
else newPos = null;
} else if (newPos.ch > line.text.length) {
if (newPos.line < doc.size - 1) newPos = {line: newPos.line + 1, ch: 0};
else newPos = null;
}
if (!newPos) {
if (flipped) {
// Driven in a corner -- no valid cursor position found at all
// -- try again *with* clearing, if we didn't already
if (!mayClear) return skipAtomic(cm, pos, bias, true);
// Otherwise, turn off editing until further notice, and return the start of the doc
cm.view.cantEdit = true;
return {line: 0, ch: 0};
}
flipped = true; newPos = pos; dir = -dir;
}
}
curPos = newPos;
continue search;
}
}
if (toClear) for (var i = 0; i < toClear.length; ++i) toClear[i].clear();
}
return curPos;
}
}
// SCROLLING
function scrollCursorIntoView(cm) {
var view = cm.view;
var coords = scrollPosIntoView(cm, view.sel.head);
if (!view.focused) return;
var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
if (coords.top + box.top < 0) doScroll = true;
else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
if (doScroll != null && !phantom) {
var hidden = display.cursor.style.display == "none";
if (hidden) {
display.cursor.style.display = "";
display.cursor.style.left = coords.left + "px";
display.cursor.style.top = (coords.top - display.viewOffset) + "px";
}
display.cursor.scrollIntoView(doScroll);
if (hidden) display.cursor.style.display = "none";
}
}
function scrollPosIntoView(cm, pos) {
for (;;) {
var changed = false, coords = cursorCoords(cm, pos);
var scrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom);
var startTop = cm.view.scrollTop, startLeft = cm.view.scrollLeft;
if (scrollPos.scrollTop != null) {
setScrollTop(cm, scrollPos.scrollTop);
if (Math.abs(cm.view.scrollTop - startTop) > 1) changed = true;
}
if (scrollPos.scrollLeft != null) {
setScrollLeft(cm, scrollPos.scrollLeft);
if (Math.abs(cm.view.scrollLeft - startLeft) > 1) changed = true;
}
if (!changed) return coords;
}
}
function scrollIntoView(cm, x1, y1, x2, y2) {
var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
}
function calculateScrollPos(cm, x1, y1, x2, y2) {
var display = cm.display, pt = paddingTop(display);
y1 += pt; y2 += pt;
var screen = display.scroller.clientHeight - scrollerCutOff, screentop = display.scroller.scrollTop, result = {};
var docBottom = cm.view.doc.height + 2 * pt;
var atTop = y1 < pt + 10, atBottom = y2 + pt > docBottom - 10;
if (y1 < screentop) result.scrollTop = atTop ? 0 : Math.max(0, y1);
else if (y2 > screentop + screen) result.scrollTop = (atBottom ? docBottom : y2) - screen;
var screenw = display.scroller.clientWidth - scrollerCutOff, screenleft = display.scroller.scrollLeft;
x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
var gutterw = display.gutters.offsetWidth;
var atLeft = x1 < gutterw + 10;
if (x1 < screenleft + gutterw || atLeft) {
if (atLeft) x1 = 0;
result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
} else if (x2 > screenw + screenleft - 3) {
result.scrollLeft = x2 + 10 - screenw;
}
return result;
}
// API UTILITIES
function indentLine(cm, n, how, aggressive) {
var doc = cm.view.doc;
if (!how) how = "add";
if (how == "smart") {
if (!cm.view.mode.indent) how = "prev";
else var state = getStateBefore(cm, n);
}
var tabSize = cm.options.tabSize;
var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
var curSpaceString = line.text.match(/^\s*/)[0], indentation;
if (how == "smart") {
indentation = cm.view.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
if (indentation == Pass) {
if (!aggressive) return;
how = "prev";
}
}
if (how == "prev") {
if (n) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
else indentation = 0;
}
else if (how == "add") indentation = curSpace + cm.options.indentUnit;
else if (how == "subtract") indentation = curSpace - cm.options.indentUnit;
indentation = Math.max(0, indentation);
var indentString = "", pos = 0;
if (cm.options.indentWithTabs)
for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
if (pos < indentation) indentString += spaceStr(indentation - pos);
if (indentString != curSpaceString)
replaceRange(cm, indentString, {line: n, ch: 0}, {line: n, ch: curSpaceString.length}, "input");
line.stateAfter = null;
}
function changeLine(cm, handle, op) {
var no = handle, line = handle, doc = cm.view.doc;
if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
else no = lineNo(handle);
if (no == null) return null;
if (op(line, no)) regChange(cm, no, no + 1);
else return null;
return line;
}
function findPosH(cm, dir, unit, visually) {
var doc = cm.view.doc, end = cm.view.sel.head, line = end.line, ch = end.ch;
var lineObj = getLine(doc, line);
function findNextLine() {
var l = line + dir;
if (l < 0 || l == doc.size) return false;
line = l;
return lineObj = getLine(doc, l);
}
function moveOnce(boundToLine) {
var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
if (next == null) {
if (!boundToLine && findNextLine()) {
if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
else ch = dir < 0 ? lineObj.text.length : 0;
} else return false;
} else ch = next;
return true;
}
if (unit == "char") moveOnce();
else if (unit == "column") moveOnce(true);
else if (unit == "word") {
var sawWord = false;
for (;;) {
if (dir < 0) if (!moveOnce()) break;
if (isWordChar(lineObj.text.charAt(ch))) sawWord = true;
else if (sawWord) {if (dir < 0) {dir = 1; moveOnce();} break;}
if (dir > 0) if (!moveOnce()) break;
}
}
return skipAtomic(cm, {line: line, ch: ch}, dir, true);
}
function findWordAt(line, pos) {
var start = pos.ch, end = pos.ch;
if (line) {
if (pos.after === false || end == line.length) --start; else ++end;
var startChar = line.charAt(start);
var check = isWordChar(startChar) ? isWordChar :
/\s/.test(startChar) ? function(ch) {return /\s/.test(ch);} :
function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
while (start > 0 && check(line.charAt(start - 1))) --start;
while (end < line.length && check(line.charAt(end))) ++end;
}
return {from: {line: pos.line, ch: start}, to: {line: pos.line, ch: end}};
}
function selectLine(cm, line) {
extendSelection(cm, {line: line, ch: 0}, clipPos(cm.view.doc, {line: line + 1, ch: 0}));
}
// PROTOTYPE
// The publicly visible API. Note that operation(null, f) means
// 'wrap f in an operation, performed on its `this` parameter'
CodeMirror.prototype = {
getValue: function(lineSep) {
var text = [], doc = this.view.doc;
doc.iter(0, doc.size, function(line) { text.push(line.text); });
return text.join(lineSep || "\n");
},
setValue: operation(null, function(code) {
var doc = this.view.doc, top = {line: 0, ch: 0}, lastLen = getLine(doc, doc.size-1).text.length;
updateDocInner(this, top, {line: doc.size - 1, ch: lastLen}, splitLines(code), top, top, "setValue");
}),
getSelection: function(lineSep) { return this.getRange(this.view.sel.from, this.view.sel.to, lineSep); },
replaceSelection: operation(null, function(code, collapse, origin) {
var sel = this.view.sel;
updateDoc(this, sel.from, sel.to, splitLines(code), collapse || "around", origin);
}),
focus: function(){window.focus(); focusInput(this); onFocus(this); fastPoll(this);},
setOption: function(option, value) {
var options = this.options, old = options[option];
if (options[option] == value && option != "mode") return;
options[option] = value;
if (optionHandlers.hasOwnProperty(option))
operation(this, optionHandlers[option])(this, value, old);
},
getOption: function(option) {return this.options[option];},
getMode: function() {return this.view.mode;},
addKeyMap: function(map) {
this.view.keyMaps.push(map);
},
removeKeyMap: function(map) {
var maps = this.view.keyMaps;
for (var i = 0; i < maps.length; ++i)
if ((typeof map == "string" ? maps[i].name : maps[i]) == map) {
maps.splice(i, 1);
return true;
}
},
addOverlay: operation(null, function(spec, options) {
var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
if (mode.startState) throw new Error("Overlays may not be stateful.");
this.view.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
this.view.modeGen++;
regChange(this, 0, this.view.doc.size);
}),
removeOverlay: operation(null, function(spec) {
var overlays = this.view.overlays;
for (var i = 0; i < overlays.length; ++i) {
if (overlays[i].modeSpec == spec) {
overlays.splice(i, 1);
this.view.modeGen++;
regChange(this, 0, this.view.doc.size);
return;
}
}
}),
undo: operation(null, function() {unredoHelper(this, "undo");}),
redo: operation(null, function() {unredoHelper(this, "redo");}),
indentLine: operation(null, function(n, dir, aggressive) {
if (typeof dir != "string") {
if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
else dir = dir ? "add" : "subtract";
}
if (isLine(this.view.doc, n)) indentLine(this, n, dir, aggressive);
}),
indentSelection: operation(null, function(how) {
var sel = this.view.sel;
if (posEq(sel.from, sel.to)) return indentLine(this, sel.from.line, how);
var e = sel.to.line - (sel.to.ch ? 0 : 1);
for (var i = sel.from.line; i <= e; ++i) indentLine(this, i, how);
}),
historySize: function() {
var hist = this.view.history;
return {undo: hist.done.length, redo: hist.undone.length};
},
clearHistory: function() {this.view.history = makeHistory();},
markClean: function() {
this.view.history.dirtyCounter = 0;
this.view.history.lastOp = this.view.history.lastOrigin = null;
},
isClean: function () {return this.view.history.dirtyCounter == 0;},
getHistory: function() {
var hist = this.view.history;
function cp(arr) {
for (var i = 0, nw = [], nwelt; i < arr.length; ++i) {
var set = arr[i];
nw.push({events: nwelt = [], fromBefore: set.fromBefore, toBefore: set.toBefore,
fromAfter: set.fromAfter, toAfter: set.toAfter});
for (var j = 0, elt = set.events; j < elt.length; ++j) {
var old = [], cur = elt[j];
nwelt.push({start: cur.start, added: cur.added, old: old});
for (var k = 0; k < cur.old.length; ++k) old.push(hlText(cur.old[k]));
}
}
return nw;
}
return {done: cp(hist.done), undone: cp(hist.undone)};
},
setHistory: function(histData) {
var hist = this.view.history = makeHistory();
hist.done = histData.done;
hist.undone = histData.undone;
},
// Fetch the parser token for a given character. Useful for hacks
// that want to inspect the mode state (say, for completion).
getTokenAt: function(pos) {
var doc = this.view.doc;
pos = clipPos(doc, pos);
var state = getStateBefore(this, pos.line), mode = this.view.mode;
var line = getLine(doc, pos.line);
var stream = new StringStream(line.text, this.options.tabSize);
while (stream.pos < 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, // Deprecated, use 'type' instead
type: style || null,
state: state};
},
getStateAfter: function(line) {
var doc = this.view.doc;
line = clipLine(doc, line == null ? doc.size - 1: line);
return getStateBefore(this, line + 1);
},
cursorCoords: function(start, mode) {
var pos, sel = this.view.sel;
if (start == null) pos = sel.head;
else if (typeof start == "object") pos = clipPos(this.view.doc, start);
else pos = start ? sel.from : sel.to;
return cursorCoords(this, pos, mode || "page");
},
charCoords: function(pos, mode) {
return charCoords(this, clipPos(this.view.doc, pos), mode || "page");
},
coordsChar: function(coords) {
var off = this.display.lineSpace.getBoundingClientRect();
return coordsChar(this, coords.left - off.left, coords.top - off.top);
},
defaultTextHeight: function() { return textHeight(this.display); },
markText: operation(null, function(from, to, options) {
return markText(this, clipPos(this.view.doc, from), clipPos(this.view.doc, to),
options, "range");
}),
setBookmark: operation(null, function(pos, widget) {
pos = clipPos(this.view.doc, pos);
return markText(this, pos, pos, widget ? {replacedWith: widget} : {}, "bookmark");
}),
findMarksAt: function(pos) {
var doc = this.view.doc;
pos = clipPos(doc, pos);
var markers = [], spans = getLine(doc, pos.line).markedSpans;
if (spans) for (var i = 0; i < spans.length; ++i) {
var span = spans[i];
if ((span.from == null || span.from <= pos.ch) &&
(span.to == null || span.to >= pos.ch))
markers.push(span.marker);
}
return markers;
},
setGutterMarker: operation(null, function(line, gutterID, value) {
return changeLine(this, line, function(line) {
var markers = line.gutterMarkers || (line.gutterMarkers = {});
markers[gutterID] = value;
if (!value && isEmpty(markers)) line.gutterMarkers = null;
return true;
});
}),
clearGutter: operation(null, function(gutterID) {
var i = 0, cm = this, doc = cm.view.doc;
doc.iter(0, doc.size, function(line) {
if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
line.gutterMarkers[gutterID] = null;
regChange(cm, i, i + 1);
if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
}
++i;
});
}),
addLineClass: operation(null, function(handle, where, cls) {
return changeLine(this, handle, function(line) {
var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
if (!line[prop]) line[prop] = cls;
else if (new RegExp("\\b" + cls + "\\b").test(line[prop])) return false;
else line[prop] += " " + cls;
return true;
});
}),
removeLineClass: operation(null, function(handle, where, cls) {
return changeLine(this, handle, function(line) {
var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
var cur = line[prop];
if (!cur) return false;
else if (cls == null) line[prop] = null;
else {
var upd = cur.replace(new RegExp("^" + cls + "\\b\\s*|\\s*\\b" + cls + "\\b"), "");
if (upd == cur) return false;
line[prop] = upd || null;
}
return true;
});
}),
addLineWidget: operation(null, function(handle, node, options) {
return addLineWidget(this, handle, node, options);
}),
removeLineWidget: function(widget) { widget.clear(); },
lineInfo: function(line) {
if (typeof line == "number") {
if (!isLine(this.view.doc, line)) return null;
var n = line;
line = getLine(this.view.doc, line);
if (!line) return null;
} else {
var n = lineNo(line);
if (n == null) return null;
}
return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
widgets: line.widgets};
},
getViewport: function() { return {from: this.display.showingFrom, to: this.display.showingTo};},
addWidget: function(pos, node, scroll, vert, horiz) {
var display = this.display;
pos = cursorCoords(this, clipPos(this.view.doc, pos));
var top = pos.top, left = pos.left;
node.style.position = "absolute";
display.sizer.appendChild(node);
if (vert == "over") top = pos.top;
else if (vert == "near") {
var vspace = Math.max(display.wrapper.clientHeight, this.view.doc.height),
hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
if (pos.bottom + node.offsetHeight > vspace && pos.top > node.offsetHeight)
top = pos.top - node.offsetHeight;
if (left + node.offsetWidth > hspace)
left = hspace - node.offsetWidth;
}
node.style.top = (top + paddingTop(display)) + "px";
node.style.left = node.style.right = "";
if (horiz == "right") {
left = display.sizer.clientWidth - node.offsetWidth;
node.style.right = "0px";
} else {
if (horiz == "left") left = 0;
else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
node.style.left = left + "px";
}
if (scroll)
scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
},
lineCount: function() {return this.view.doc.size;},
clipPos: function(pos) {return clipPos(this.view.doc, pos);},
getCursor: function(start) {
var sel = this.view.sel, pos;
if (start == null || start == "head") pos = sel.head;
else if (start == "anchor") pos = sel.anchor;
else if (start == "end" || start === false) pos = sel.to;
else pos = sel.from;
return copyPos(pos);
},
somethingSelected: function() {return !posEq(this.view.sel.from, this.view.sel.to);},
setCursor: operation(null, function(line, ch, extend) {
var pos = clipPos(this.view.doc, typeof line == "number" ? {line: line, ch: ch || 0} : line);
if (extend) extendSelection(this, pos);
else setSelection(this, pos, pos);
}),
setSelection: operation(null, function(anchor, head) {
var doc = this.view.doc;
setSelection(this, clipPos(doc, anchor), clipPos(doc, head || anchor));
}),
extendSelection: operation(null, function(from, to) {
var doc = this.view.doc;
extendSelection(this, clipPos(doc, from), to && clipPos(doc, to));
}),
setExtending: function(val) {this.view.sel.extend = val;},
getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
getLineHandle: function(line) {
var doc = this.view.doc;
if (isLine(doc, line)) return getLine(doc, line);
},
getLineNumber: function(line) {return lineNo(line);},
setLine: operation(null, function(line, text) {
if (isLine(this.view.doc, line))
replaceRange(this, text, {line: line, ch: 0}, {line: line, ch: getLine(this.view.doc, line).text.length});
}),
removeLine: operation(null, function(line) {
if (isLine(this.view.doc, line))
replaceRange(this, "", {line: line, ch: 0}, clipPos(this.view.doc, {line: line+1, ch: 0}));
}),
replaceRange: operation(null, function(code, from, to) {
var doc = this.view.doc;
from = clipPos(doc, from);
to = to ? clipPos(doc, to) : from;
return replaceRange(this, code, from, to);
}),
getRange: function(from, to, lineSep) {
var doc = this.view.doc;
from = clipPos(doc, from); to = clipPos(doc, to);
var l1 = from.line, l2 = to.line;
if (l1 == l2) return getLine(doc, l1).text.slice(from.ch, to.ch);
var code = [getLine(doc, l1).text.slice(from.ch)];
doc.iter(l1 + 1, l2, function(line) { code.push(line.text); });
code.push(getLine(doc, l2).text.slice(0, to.ch));
return code.join(lineSep || "\n");
},
triggerOnKeyDown: operation(null, onKeyDown),
execCommand: function(cmd) {return commands[cmd](this);},
// Stuff used by commands, probably not much use to outside code.
moveH: operation(null, function(dir, unit) {
var sel = this.view.sel, pos = dir < 0 ? sel.from : sel.to;
if (sel.shift || sel.extend || posEq(sel.from, sel.to))
pos = findPosH(this, dir, unit, this.options.rtlMoveVisually);
extendSelection(this, pos, pos, dir);
}),
deleteH: operation(null, function(dir, unit) {
var sel = this.view.sel;
if (!posEq(sel.from, sel.to)) replaceRange(this, "", sel.from, sel.to, "delete");
else replaceRange(this, "", sel.from, findPosH(this, dir, unit, false), "delete");
this.curOp.userSelChange = true;
}),
moveV: operation(null, function(dir, unit) {
var view = this.view, doc = view.doc, display = this.display;
var cur = view.sel.head, pos = cursorCoords(this, cur, "div");
var x = pos.left, y;
if (view.goalColumn != null) x = view.goalColumn;
if (unit == "page") {
var pageSize = Math.min(display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
y = pos.top + dir * pageSize;
} else if (unit == "line") {
y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
}
do {
var target = coordsChar(this, x, y);
y += dir * 5;
} while (target.outside && (dir < 0 ? y > 0 : y < doc.height));
if (unit == "page") display.scrollbarV.scrollTop += charCoords(this, target, "div").top - pos.top;
extendSelection(this, target, target, dir);
view.goalColumn = x;
}),
toggleOverwrite: function() {
if (this.view.overwrite = !this.view.overwrite)
this.display.cursor.className += " CodeMirror-overwrite";
else
this.display.cursor.className = this.display.cursor.className.replace(" CodeMirror-overwrite", "");
},
posFromIndex: function(off) {
var lineNo = 0, ch, doc = this.view.doc;
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(doc, {line: lineNo, ch: ch});
},
indexFromPos: function (coords) {
coords = clipPos(this.view.doc, coords);
var index = coords.ch;
this.view.doc.iter(0, coords.line, function (line) {
index += line.text.length + 1;
});
return index;
},
scrollTo: function(x, y) {
if (x != null) this.display.scrollbarH.scrollLeft = this.display.scroller.scrollLeft = x;
if (y != null) this.display.scrollbarV.scrollTop = this.display.scroller.scrollTop = y;
updateDisplay(this, []);
},
getScrollInfo: function() {
var scroller = this.display.scroller, co = scrollerCutOff;
return {left: scroller.scrollLeft, top: scroller.scrollTop,
height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co};
},
scrollIntoView: function(pos) {
if (typeof pos == "number") pos = {line: pos, ch: 0};
if (!pos || pos.line != null) {
pos = pos ? clipPos(this.view.doc, pos) : this.view.sel.head;
scrollPosIntoView(this, pos);
} else {
scrollIntoView(this, pos.left, pos.top, pos.right, pos.bottom);
}
},
setSize: function(width, height) {
function interpret(val) {
return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
}
if (width != null) this.display.wrapper.style.width = interpret(width);
if (height != null) this.display.wrapper.style.height = interpret(height);
this.refresh();
},
on: function(type, f) {on(this, type, f);},
off: function(type, f) {off(this, type, f);},
operation: function(f){return operation(this, f)();},
refresh: function() {
clearCaches(this);
var sTop = this.view.scrollTop, sLeft = this.view.scrollLeft;
if (this.display.scroller.scrollHeight > sTop)
this.display.scrollbarV.scrollTop = this.display.scroller.scrollTop = sTop;
if (this.display.scroller.scrollWidth > sLeft)
this.display.scrollbarH.scrollLeft = this.display.scroller.scrollLeft = sLeft;
updateDisplay(this, true);
},
getInputField: function(){return this.display.input;},
getWrapperElement: function(){return this.display.wrapper;},
getScrollerElement: function(){return this.display.scroller;},
getGutterElement: function(){return this.display.gutters;}
};
// OPTION DEFAULTS
var optionHandlers = CodeMirror.optionHandlers = {};
// The default configuration options.
var defaults = CodeMirror.defaults = {};
function option(name, deflt, handle, notOnInit) {
CodeMirror.defaults[name] = deflt;
if (handle) optionHandlers[name] =
notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
}
var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
// These two are, on init, called from the constructor because they
// have to be initialized before the editor can start at all.
option("value", "", function(cm, val) {cm.setValue(val);}, true);
option("mode", null, loadMode, true);
option("indentUnit", 2, loadMode, true);
option("indentWithTabs", false);
option("smartIndent", true);
option("tabSize", 4, function(cm) {
loadMode(cm);
clearCaches(cm);
updateDisplay(cm, true);
}, true);
option("electricChars", true);
option("rtlMoveVisually", !windows);
option("theme", "default", function(cm) {
themeChanged(cm);
guttersChanged(cm);
}, true);
option("keyMap", "default", keyMapChanged);
option("extraKeys", null);
option("onKeyEvent", null);
option("onDragEvent", null);
option("lineWrapping", false, wrappingChanged, true);
option("gutters", [], function(cm) {
setGuttersForLineNumbers(cm.options);
guttersChanged(cm);
}, true);
option("fixedGutter", true, function(cm, val) {
cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
cm.refresh();
}, true);
option("lineNumbers", false, function(cm) {
setGuttersForLineNumbers(cm.options);
guttersChanged(cm);
}, true);
option("firstLineNumber", 1, guttersChanged, true);
option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
option("showCursorWhenSelecting", false, updateSelection, true);
option("readOnly", false, function(cm, val) {
if (val == "nocursor") {onBlur(cm); cm.display.input.blur();}
else if (!val) resetInput(cm, true);
});
option("dragDrop", true);
option("cursorBlinkRate", 530);
option("cursorHeight", 1);
option("workTime", 100);
option("workDelay", 100);
option("flattenSpans", true);
option("pollInterval", 100);
option("undoDepth", 40);
option("viewportMargin", 10, function(cm){cm.refresh();}, true);
option("tabindex", null, function(cm, val) {
cm.display.input.tabIndex = val || "";
});
option("autofocus", null);
// MODE DEFINITION AND QUERYING
// Known modes, by name and by MIME
var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
CodeMirror.defineMode = function(name, mode) {
if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
if (arguments.length > 2) {
mode.dependencies = [];
for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]);
}
modes[name] = mode;
};
CodeMirror.defineMIME = function(mime, spec) {
mimeModes[mime] = spec;
};
CodeMirror.resolveMode = function(spec) {
if (typeof spec == "string" && mimeModes.hasOwnProperty(spec))
spec = mimeModes[spec];
else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec))
return CodeMirror.resolveMode("application/xml");
if (typeof spec == "string") return {name: spec};
else return spec || {name: "null"};
};
CodeMirror.getMode = function(options, spec) {
spec = CodeMirror.resolveMode(spec);
var mfactory = modes[spec.name];
if (!mfactory) return CodeMirror.getMode(options, "text/plain");
var modeObj = mfactory(options, spec);
if (modeExtensions.hasOwnProperty(spec.name)) {
var exts = modeExtensions[spec.name];
for (var prop in exts) {
if (!exts.hasOwnProperty(prop)) continue;
if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
modeObj[prop] = exts[prop];
}
}
modeObj.name = spec.name;
return modeObj;
};
CodeMirror.defineMode("null", function() {
return {token: function(stream) {stream.skipToEnd();}};
});
CodeMirror.defineMIME("text/plain", "null");
var modeExtensions = CodeMirror.modeExtensions = {};
CodeMirror.extendMode = function(mode, properties) {
var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
for (var prop in properties) if (properties.hasOwnProperty(prop))
exts[prop] = properties[prop];
};
// EXTENSIONS
CodeMirror.defineExtension = function(name, func) {
CodeMirror.prototype[name] = func;
};
CodeMirror.defineOption = option;
var initHooks = [];
CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
// MODE STATE HANDLING
// 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.copyState = copyState;
function startState(mode, a1, a2) {
return mode.startState ? mode.startState(a1, a2) : true;
}
CodeMirror.startState = startState;
CodeMirror.innerMode = function(mode, state) {
while (mode.innerMode) {
var info = mode.innerMode(state);
state = info.state;
mode = info.mode;
}
return info || {mode: mode, state: state};
};
// STANDARD COMMANDS
var commands = CodeMirror.commands = {
selectAll: function(cm) {cm.setSelection({line: 0, ch: 0}, {line: cm.lineCount() - 1});},
killLine: function(cm) {
var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
if (!sel && cm.getLine(from.line).length == from.ch)
cm.replaceRange("", from, {line: from.line + 1, ch: 0}, "delete");
else cm.replaceRange("", from, sel ? to : {line: from.line}, "delete");
},
deleteLine: function(cm) {
var l = cm.getCursor().line;
cm.replaceRange("", {line: l, ch: 0}, {line: l}, "delete");
},
undo: function(cm) {cm.undo();},
redo: function(cm) {cm.redo();},
goDocStart: function(cm) {cm.extendSelection({line: 0, ch: 0});},
goDocEnd: function(cm) {cm.extendSelection({line: cm.lineCount() - 1});},
goLineStart: function(cm) {
cm.extendSelection(lineStart(cm, cm.getCursor().line));
},
goLineStartSmart: function(cm) {
var cur = cm.getCursor(), start = lineStart(cm, cur.line);
var line = cm.getLineHandle(start.line);
var order = getOrder(line);
if (!order || order[0].level == 0) {
var firstNonWS = Math.max(0, line.text.search(/\S/));
var inWS = cur.line == start.line && cur.ch <= firstNonWS && cur.ch;
cm.extendSelection({line: start.line, ch: inWS ? 0 : firstNonWS});
} else cm.extendSelection(start);
},
goLineEnd: function(cm) {
cm.extendSelection(lineEnd(cm, cm.getCursor().line));
},
goLineUp: function(cm) {cm.moveV(-1, "line");},
goLineDown: function(cm) {cm.moveV(1, "line");},
goPageUp: function(cm) {cm.moveV(-1, "page");},
goPageDown: function(cm) {cm.moveV(1, "page");},
goCharLeft: function(cm) {cm.moveH(-1, "char");},
goCharRight: function(cm) {cm.moveH(1, "char");},
goColumnLeft: function(cm) {cm.moveH(-1, "column");},
goColumnRight: function(cm) {cm.moveH(1, "column");},
goWordLeft: function(cm) {cm.moveH(-1, "word");},
goWordRight: function(cm) {cm.moveH(1, "word");},
delCharBefore: function(cm) {cm.deleteH(-1, "char");},
delCharAfter: function(cm) {cm.deleteH(1, "char");},
delWordBefore: function(cm) {cm.deleteH(-1, "word");},
delWordAfter: function(cm) {cm.deleteH(1, "word");},
indentAuto: function(cm) {cm.indentSelection("smart");},
indentMore: function(cm) {cm.indentSelection("add");},
indentLess: function(cm) {cm.indentSelection("subtract");},
insertTab: function(cm) {cm.replaceSelection("\t", "end", "input");},
defaultTab: function(cm) {
if (cm.somethingSelected()) cm.indentSelection("add");
else cm.replaceSelection("\t", "end", "input");
},
transposeChars: function(cm) {
var cur = cm.getCursor(), line = cm.getLine(cur.line);
if (cur.ch > 0 && cur.ch < line.length - 1)
cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
{line: cur.line, ch: cur.ch - 1}, {line: cur.line, ch: cur.ch + 1});
},
newlineAndIndent: function(cm) {
operation(cm, function() {
cm.replaceSelection("\n", "end", "input");
cm.indentLine(cm.getCursor().line, null, true);
})();
},
toggleOverwrite: function(cm) {cm.toggleOverwrite();}
};
// STANDARD KEYMAPS
var keyMap = CodeMirror.keyMap = {};
keyMap.basic = {
"Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
"End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
"Delete": "delCharAfter", "Backspace": "delCharBefore", "Tab": "defaultTab", "Shift-Tab": "indentAuto",
"Enter": "newlineAndIndent", "Insert": "toggleOverwrite"
};
// Note that the save and find-related commands aren't defined by
// default. Unknown commands are simply ignored.
keyMap.pcDefault = {
"Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
"Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
"Ctrl-Left": "goWordLeft", "Ctrl-Right": "goWordRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
"Ctrl-Backspace": "delWordBefore", "Ctrl-Delete": "delWordAfter", "Ctrl-S": "save", "Ctrl-F": "find",
"Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
"Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
fallthrough: "basic"
};
keyMap.macDefault = {
"Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
"Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goWordLeft",
"Alt-Right": "goWordRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delWordBefore",
"Ctrl-Alt-Backspace": "delWordAfter", "Alt-Delete": "delWordAfter", "Cmd-S": "save", "Cmd-F": "find",
"Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
"Cmd-[": "indentLess", "Cmd-]": "indentMore",
fallthrough: ["basic", "emacsy"]
};
keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
keyMap.emacsy = {
"Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
"Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
"Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
"Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
};
// KEYMAP DISPATCH
function getKeyMap(val) {
if (typeof val == "string") return keyMap[val];
else return val;
}
function lookupKey(name, maps, handle, stop) {
function lookup(map) {
map = getKeyMap(map);
var found = map[name];
if (found === false) {
if (stop) stop();
return true;
}
if (found != null && handle(found)) return true;
if (map.nofallthrough) {
if (stop) stop();
return true;
}
var fallthrough = map.fallthrough;
if (fallthrough == null) return false;
if (Object.prototype.toString.call(fallthrough) != "[object Array]")
return lookup(fallthrough);
for (var i = 0, e = fallthrough.length; i < e; ++i) {
if (lookup(fallthrough[i])) return true;
}
return false;
}
for (var i = 0; i < maps.length; ++i)
if (lookup(maps[i])) return true;
}
function isModifierKey(event) {
var name = keyNames[e_prop(event, "keyCode")];
return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
}
CodeMirror.isModifierKey = isModifierKey;
// FROMTEXTAREA
CodeMirror.fromTextArea = function(textarea, options) {
if (!options) options = {};
options.value = textarea.value;
if (!options.tabindex && textarea.tabindex)
options.tabindex = textarea.tabindex;
// Set autofocus to true if this textarea is focused, or if it has
// autofocus and no other element is focused.
if (options.autofocus == null) {
var hasFocus = document.body;
// doc.activeElement occasionally throws on IE
try { hasFocus = document.activeElement; } catch(e) {}
options.autofocus = hasFocus == textarea ||
textarea.getAttribute("autofocus") != null && hasFocus == document.body;
}
function save() {textarea.value = cm.getValue();}
if (textarea.form) {
// Deplorable hack to make the submit method do the right thing.
on(textarea.form, "submit", save);
var form = textarea.form, realSubmit = form.submit;
try {
form.submit = function wrappedSubmit() {
save();
form.submit = realSubmit;
form.submit();
form.submit = wrappedSubmit;
};
} catch(e) {}
}
textarea.style.display = "none";
var cm = CodeMirror(function(node) {
textarea.parentNode.insertBefore(node, textarea.nextSibling);
}, options);
cm.save = save;
cm.getTextArea = function() { return textarea; };
cm.toTextArea = function() {
save();
textarea.parentNode.removeChild(cm.getWrapperElement());
textarea.style.display = "";
if (textarea.form) {
off(textarea.form, "submit", save);
if (typeof textarea.form.submit == "function")
textarea.form.submit = realSubmit;
}
};
return cm;
};
// STRING STREAM
// Fed to the mode parsers, provides helper functions to make
// parsers more succinct.
// The character stream used by a mode's parser.
function StringStream(string, tabSize) {
this.pos = this.start = 0;
this.string = string;
this.tabSize = tabSize || 8;
}
StringStream.prototype = {
eol: function() {return this.pos >= this.string.length;},
sol: function() {return this.pos == 0;},
peek: function() {return this.string.charAt(this.pos) || undefined;},
next: function() {
if (this.pos < this.string.length)
return this.string.charAt(this.pos++);
},
eat: function(match) {
var ch = this.string.charAt(this.pos);
if (typeof match == "string") var ok = ch == match;
else var ok = ch && (match.test ? match.test(ch) : match(ch));
if (ok) {++this.pos; return ch;}
},
eatWhile: function(match) {
var start = this.pos;
while (this.eat(match)){}
return this.pos > start;
},
eatSpace: function() {
var start = this.pos;
while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
return this.pos > start;
},
skipToEnd: function() {this.pos = this.string.length;},
skipTo: function(ch) {
var found = this.string.indexOf(ch, this.pos);
if (found > -1) {this.pos = found; return true;}
},
backUp: function(n) {this.pos -= n;},
column: function() {return countColumn(this.string, this.start, this.tabSize);},
indentation: function() {return countColumn(this.string, null, this.tabSize);},
match: function(pattern, consume, caseInsensitive) {
if (typeof pattern == "string") {
var cased = function(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 && match.index > 0) return null;
if (match && consume !== false) this.pos += match[0].length;
return match;
}
},
current: function(){return this.string.slice(this.start, this.pos);}
};
CodeMirror.StringStream = StringStream;
// TEXTMARKERS
function TextMarker(cm, type) {
this.lines = [];
this.type = type;
this.cm = cm;
}
CodeMirror.TextMarker = TextMarker;
TextMarker.prototype.clear = function() {
if (this.explicitlyCleared) return;
startOperation(this.cm);
var view = this.cm.view, min = null, max = null;
for (var i = 0; i < this.lines.length; ++i) {
var line = this.lines[i];
var span = getMarkedSpanFor(line.markedSpans, this);
if (span.to != null) max = lineNo(line);
line.markedSpans = removeMarkedSpan(line.markedSpans, span);
if (span.from != null)
min = lineNo(line);
else if (this.collapsed && !lineIsHidden(line))
updateLineHeight(line, textHeight(this.cm.display));
}
if (this.collapsed && !this.cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
var visual = visualLine(view.doc, this.lines[i]), len = lineLength(view.doc, visual);
if (len > view.maxLineLength) {
view.maxLine = visual;
view.maxLineLength = len;
view.maxLineChanged = true;
}
}
if (min != null) regChange(this.cm, min, max + 1);
this.lines.length = 0;
this.explicitlyCleared = true;
if (this.collapsed && this.cm.view.cantEdit) {
this.cm.view.cantEdit = false;
reCheckSelection(this.cm);
}
endOperation(this.cm);
signalLater(this.cm, this, "clear");
};
TextMarker.prototype.find = function() {
var from, to;
for (var i = 0; i < this.lines.length; ++i) {
var line = this.lines[i];
var span = getMarkedSpanFor(line.markedSpans, this);
if (span.from != null || span.to != null) {
var found = lineNo(line);
if (span.from != null) from = {line: found, ch: span.from};
if (span.to != null) to = {line: found, ch: span.to};
}
}
if (this.type == "bookmark") return from;
return from && {from: from, to: to};
};
TextMarker.prototype.getOptions = function(copyWidget) {
var repl = this.replacedWith;
return {className: this.className,
inclusiveLeft: this.inclusiveLeft, inclusiveRight: this.inclusiveRight,
atomic: this.atomic,
collapsed: this.collapsed,
clearOnEnter: this.clearOnEnter,
replacedWith: copyWidget ? repl && repl.cloneNode(true) : repl,
readOnly: this.readOnly,
startStyle: this.startStyle, endStyle: this.endStyle};
};
function markText(cm, from, to, options, type) {
var doc = cm.view.doc;
var marker = new TextMarker(cm, type);
if (type == "range" && !posLess(from, to)) return marker;
if (options) for (var opt in options) if (options.hasOwnProperty(opt))
marker[opt] = options[opt];
if (marker.replacedWith) {
marker.collapsed = true;
marker.replacedWith = elt("span", [marker.replacedWith], "CodeMirror-widget");
}
if (marker.collapsed) sawCollapsedSpans = true;
var curLine = from.line, size = 0, collapsedAtStart, collapsedAtEnd;
doc.iter(curLine, to.line + 1, function(line) {
if (marker.collapsed && !cm.options.lineWrapping && visualLine(doc, line) == cm.view.maxLine)
cm.curOp.updateMaxLine = true;
var span = {from: null, to: null, marker: marker};
size += line.text.length;
if (curLine == from.line) {span.from = from.ch; size -= from.ch;}
if (curLine == to.line) {span.to = to.ch; size -= line.text.length - to.ch;}
if (marker.collapsed) {
if (curLine == to.line) collapsedAtEnd = collapsedSpanAt(line, to.ch);
if (curLine == from.line) collapsedAtStart = collapsedSpanAt(line, from.ch);
else updateLineHeight(line, 0);
}
addMarkedSpan(line, span);
++curLine;
});
if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
if (lineIsHidden(line)) updateLineHeight(line, 0);
});
if (marker.readOnly) {
sawReadOnlySpans = true;
if (cm.view.history.done.length || cm.view.history.undone.length)
cm.clearHistory();
}
if (marker.collapsed) {
if (collapsedAtStart != collapsedAtEnd)
throw new Error("Inserting collapsed marker overlapping an existing one");
marker.size = size;
marker.atomic = true;
}
if (marker.className || marker.startStyle || marker.endStyle || marker.collapsed)
regChange(cm, from.line, to.line + 1);
if (marker.atomic) reCheckSelection(cm);
return marker;
}
// TEXTMARKER SPANS
function getMarkedSpanFor(spans, marker) {
if (spans) for (var i = 0; i < spans.length; ++i) {
var span = spans[i];
if (span.marker == marker) return span;
}
}
function removeMarkedSpan(spans, span) {
for (var r, i = 0; i < spans.length; ++i)
if (spans[i] != span) (r || (r = [])).push(spans[i]);
return r;
}
function addMarkedSpan(line, span) {
line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
span.marker.lines.push(line);
}
function markedSpansBefore(old, startCh) {
if (old) for (var i = 0, nw; i < old.length; ++i) {
var span = old[i], marker = span.marker;
var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
if (startsBefore || marker.type == "bookmark" && span.from == startCh) {
var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
(nw || (nw = [])).push({from: span.from,
to: endsAfter ? null : span.to,
marker: marker});
}
}
return nw;
}
function markedSpansAfter(old, startCh, endCh) {
if (old) for (var i = 0, nw; i < old.length; ++i) {
var span = old[i], marker = span.marker;
var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
if (endsAfter || marker.type == "bookmark" && span.from == endCh && span.from != startCh) {
var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
(nw || (nw = [])).push({from: startsBefore ? null : span.from - endCh,
to: span.to == null ? null : span.to - endCh,
marker: marker});
}
}
return nw;
}
function updateMarkedSpans(oldFirst, oldLast, startCh, endCh, newText) {
if (!oldFirst && !oldLast) return newText;
// Get the spans that 'stick out' on both sides
var first = markedSpansBefore(oldFirst, startCh);
var last = markedSpansAfter(oldLast, startCh, endCh);
// Next, merge those two ends
var sameLine = newText.length == 1, offset = lst(newText).length + (sameLine ? startCh : 0);
if (first) {
// Fix up .to properties of first
for (var i = 0; i < first.length; ++i) {
var span = first[i];
if (span.to == null) {
var found = getMarkedSpanFor(last, span.marker);
if (!found) span.to = startCh;
else if (sameLine) span.to = found.to == null ? null : found.to + offset;
}
}
}
if (last) {
// Fix up .from in last (or move them into first in case of sameLine)
for (var i = 0; i < last.length; ++i) {
var span = last[i];
if (span.to != null) span.to += offset;
if (span.from == null) {
var found = getMarkedSpanFor(first, span.marker);
if (!found) {
span.from = offset;
if (sameLine) (first || (first = [])).push(span);
}
} else {
span.from += offset;
if (sameLine) (first || (first = [])).push(span);
}
}
}
var newMarkers = [newHL(newText[0], first)];
if (!sameLine) {
// Fill gap with whole-line-spans
var gap = newText.length - 2, gapMarkers;
if (gap > 0 && first)
for (var i = 0; i < first.length; ++i)
if (first[i].to == null)
(gapMarkers || (gapMarkers = [])).push({from: null, to: null, marker: first[i].marker});
for (var i = 0; i < gap; ++i)
newMarkers.push(newHL(newText[i+1], gapMarkers));
newMarkers.push(newHL(lst(newText), last));
}
return newMarkers;
}
function removeReadOnlyRanges(doc, from, to) {
var markers = null;
doc.iter(from.line, to.line + 1, function(line) {
if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
var mark = line.markedSpans[i].marker;
if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
(markers || (markers = [])).push(mark);
}
});
if (!markers) return null;
var parts = [{from: from, to: to}];
for (var i = 0; i < markers.length; ++i) {
var m = markers[i].find();
for (var j = 0; j < parts.length; ++j) {
var p = parts[j];
if (!posLess(m.from, p.to) || posLess(m.to, p.from)) continue;
var newParts = [j, 1];
if (posLess(p.from, m.from)) newParts.push({from: p.from, to: m.from});
if (posLess(m.to, p.to)) newParts.push({from: m.to, to: p.to});
parts.splice.apply(parts, newParts);
j += newParts.length - 1;
}
}
return parts;
}
function collapsedSpanAt(line, ch) {
var sps = sawCollapsedSpans && line.markedSpans, found;
if (sps) for (var sp, i = 0; i < sps.length; ++i) {
sp = sps[i];
if (!sp.marker.collapsed) continue;
if ((sp.from == null || sp.from < ch) &&
(sp.to == null || sp.to > ch) &&
(!found || found.width < sp.marker.width))
found = sp.marker;
}
return found;
}
function collapsedSpanAtStart(line) { return collapsedSpanAt(line, -1); }
function collapsedSpanAtEnd(line) { return collapsedSpanAt(line, line.text.length + 1); }
function visualLine(doc, line) {
var merged;
while (merged = collapsedSpanAtStart(line))
line = getLine(doc, merged.find().from.line);
return line;
}
function lineIsHidden(line) {
var sps = sawCollapsedSpans && line.markedSpans;
if (sps) for (var sp, i = 0; i < sps.length; ++i) {
sp = sps[i];
if (!sp.marker.collapsed) continue;
if (sp.from == null) return true;
if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(line, sp))
return true;
}
}
function lineIsHiddenInner(line, span) {
if (span.to == null) {
var end = span.marker.find().to, endLine = getLine(lineDoc(line), end.line);
return lineIsHiddenInner(endLine, getMarkedSpanFor(endLine.markedSpans, span.marker));
}
if (span.marker.inclusiveRight && span.to == line.text.length)
return true;
for (var sp, i = 0; i < line.markedSpans.length; ++i) {
sp = line.markedSpans[i];
if (sp.marker.collapsed && sp.from == span.to &&
(sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
lineIsHiddenInner(line, sp)) return true;
}
}
// hl stands for history-line, a data structure that can be either a
// string (line without markers) or a {text, markedSpans} object.
function hlText(val) { return typeof val == "string" ? val : val.text; }
function hlSpans(val) {
if (typeof val == "string") return null;
var spans = val.markedSpans, out = null;
for (var i = 0; i < spans.length; ++i) {
if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
else if (out) out.push(spans[i]);
}
return !out ? spans : out.length ? out : null;
}
function newHL(text, spans) { return spans ? {text: text, markedSpans: spans} : text; }
function detachMarkedSpans(line) {
var spans = line.markedSpans;
if (!spans) return;
for (var i = 0; i < spans.length; ++i) {
var lines = spans[i].marker.lines;
var ix = indexOf(lines, line);
lines.splice(ix, 1);
}
line.markedSpans = null;
}
function attachMarkedSpans(line, spans) {
if (!spans) return;
for (var i = 0; i < spans.length; ++i)
spans[i].marker.lines.push(line);
line.markedSpans = spans;
}
// LINE WIDGETS
var LineWidget = CodeMirror.LineWidget = function(cm, node, options) {
for (var opt in options) if (options.hasOwnProperty(opt))
this[opt] = options[opt];
this.cm = cm;
this.node = node;
};
function widgetOperation(f) {
return function() {
startOperation(this.cm);
try {var result = f.apply(this, arguments);}
finally {endOperation(this.cm);}
return result;
};
}
LineWidget.prototype.clear = widgetOperation(function() {
var ws = this.line.widgets, no = lineNo(this.line);
if (no == null || !ws) return;
for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
updateLineHeight(this.line, Math.max(0, this.line.height - widgetHeight(this)));
regChange(this.cm, no, no + 1);
});
LineWidget.prototype.changed = widgetOperation(function() {
var oldH = this.height;
this.height = null;
var diff = widgetHeight(this) - oldH;
if (!diff) return;
updateLineHeight(this.line, this.line.height + diff);
var no = lineNo(this.line);
regChange(this.cm, no, no + 1);
});
function widgetHeight(widget) {
if (widget.height != null) return widget.height;
if (!widget.node.parentNode || widget.node.parentNode.nodeType != 1)
removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
return widget.height = widget.node.offsetHeight;
}
function addLineWidget(cm, handle, node, options) {
var widget = new LineWidget(cm, node, options);
if (widget.noHScroll) cm.display.alignWidgets = true;
changeLine(cm, handle, function(line) {
(line.widgets || (line.widgets = [])).push(widget);
widget.line = line;
if (!lineIsHidden(line) || widget.showIfHidden) {
var aboveVisible = heightAtLine(cm, line) < cm.display.scroller.scrollTop;
updateLineHeight(line, line.height + widgetHeight(widget));
if (aboveVisible)
setTimeout(function() {cm.display.scroller.scrollTop += widget.height;});
}
return true;
});
return widget;
}
// LINE DATA STRUCTURE
// Line objects. These hold state related to a line, including
// highlighting info (the styles array).
function makeLine(text, markedSpans, height) {
var line = {text: text, height: height};
attachMarkedSpans(line, markedSpans);
if (lineIsHidden(line)) line.height = 0;
return line;
}
function updateLine(cm, line, text, markedSpans) {
line.text = text;
if (line.stateAfter) line.stateAfter = null;
if (line.styles) line.styles = null;
if (line.order != null) line.order = null;
detachMarkedSpans(line);
attachMarkedSpans(line, markedSpans);
if (lineIsHidden(line)) line.height = 0;
else if (!line.height) line.height = textHeight(cm.display);
signalLater(cm, line, "change");
}
function cleanUpLine(line) {
line.parent = null;
detachMarkedSpans(line);
}
// Run the given mode's parser over a line, update the styles
// array, which contains alternating fragments of text and CSS
// classes.
function runMode(cm, text, mode, state, f) {
var flattenSpans = cm.options.flattenSpans;
var curText = "", curStyle = null;
var stream = new StringStream(text, cm.options.tabSize);
if (text == "" && mode.blankLine) mode.blankLine(state);
while (!stream.eol()) {
var style = mode.token(stream, state);
if (stream.pos > 5000) {
flattenSpans = false;
// Webkit seems to refuse to render text nodes longer than 57444 characters
stream.pos = Math.min(text.length, stream.start + 50000);
style = null;
}
var substr = stream.current();
stream.start = stream.pos;
if (!flattenSpans || curStyle != style) {
if (curText) f(curText, curStyle);
curText = substr; curStyle = style;
} else curText = curText + substr;
}
if (curText) f(curText, curStyle);
}
function highlightLine(cm, line, state) {
// A styles array always starts with a number identifying the
// mode/overlays that it is based on (for easy invalidation).
var st = [cm.view.modeGen];
// Compute the base array of styles
runMode(cm, line.text, cm.view.mode, state, function(txt, style) {st.push(txt, style);});
// Run overlays, adjust style array.
for (var o = 0; o < cm.view.overlays.length; ++o) {
var overlay = cm.view.overlays[o], i = 1;
runMode(cm, line.text, overlay.mode, true, function(txt, style) {
var start = i, len = txt.length;
// Ensure there's a token end at the current position, and that i points at it
while (len) {
var cur = st[i], len_ = cur.length;
if (len_ <= len) {
len -= len_;
} else {
st.splice(i, 1, cur.slice(0, len), st[i+1], cur.slice(len));
len = 0;
}
i += 2;
}
if (!style) return;
if (overlay.opaque) {
st.splice(start, i - start, txt, style);
i = start + 2;
} else {
for (; start < i; start += 2) {
var cur = st[start+1];
st[start+1] = cur ? cur + " " + style : style;
}
}
});
}
return st;
}
function getLineStyles(cm, line) {
if (!line.styles || line.styles[0] != cm.view.modeGen)
line.styles = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
return line.styles;
}
// Lightweight form of highlight -- proceed over this line and
// update state, but don't save a style array.
function processLine(cm, line, state) {
var mode = cm.view.mode;
var stream = new StringStream(line.text, cm.options.tabSize);
if (line.text == "" && mode.blankLine) mode.blankLine(state);
while (!stream.eol() && stream.pos <= 5000) {
mode.token(stream, state);
stream.start = stream.pos;
}
}
var styleToClassCache = {};
function styleToClass(style) {
if (!style) return null;
return styleToClassCache[style] ||
(styleToClassCache[style] = "cm-" + style.replace(/ +/g, " cm-"));
}
function lineContent(cm, realLine, measure) {
var merged, line = realLine, lineBefore, sawBefore, simple = true;
while (merged = collapsedSpanAtStart(line)) {
simple = false;
line = getLine(cm.view.doc, merged.find().from.line);
if (!lineBefore) lineBefore = line;
}
var builder = {pre: elt("pre"), col: 0, pos: 0, display: !measure,
measure: null, addedOne: false, cm: cm};
if (line.textClass) builder.pre.className = line.textClass;
do {
builder.measure = line == realLine && measure;
builder.pos = 0;
builder.addToken = builder.measure ? buildTokenMeasure : buildToken;
if (measure && sawBefore && line != realLine && !builder.addedOne) {
measure[0] = builder.pre.appendChild(zeroWidthElement(cm.display.measure));
builder.addedOne = true;
}
var next = insertLineContent(line, builder, getLineStyles(cm, line));
sawBefore = line == lineBefore;
if (next) {
line = getLine(cm.view.doc, next.to.line);
simple = false;
}
} while (next);
if (measure && !builder.addedOne)
measure[0] = builder.pre.appendChild(simple ? elt("span", "\u00a0") : zeroWidthElement(cm.display.measure));
if (!builder.pre.firstChild && !lineIsHidden(realLine))
builder.pre.appendChild(document.createTextNode("\u00a0"));
return builder.pre;
}
var tokenSpecialChars = /[\t\u0000-\u0019\u200b\u2028\u2029\uFEFF]/g;
function buildToken(builder, text, style, startStyle, endStyle) {
if (!text) return;
if (!tokenSpecialChars.test(text)) {
builder.col += text.length;
var content = document.createTextNode(text);
} else {
var content = document.createDocumentFragment(), pos = 0;
while (true) {
tokenSpecialChars.lastIndex = pos;
var m = tokenSpecialChars.exec(text);
var skipped = m ? m.index - pos : text.length - pos;
if (skipped) {
content.appendChild(document.createTextNode(text.slice(pos, pos + skipped)));
builder.col += skipped;
}
if (!m) break;
pos += skipped + 1;
if (m[0] == "\t") {
var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
builder.col += tabWidth;
} else {
var token = elt("span", "\u2022", "cm-invalidchar");
token.title = "\\u" + m[0].charCodeAt(0).toString(16);
content.appendChild(token);
builder.col += 1;
}
}
}
if (style || startStyle || endStyle || builder.measure) {
var fullStyle = style || "";
if (startStyle) fullStyle += startStyle;
if (endStyle) fullStyle += endStyle;
return builder.pre.appendChild(elt("span", [content], fullStyle));
}
builder.pre.appendChild(content);
}
function buildTokenMeasure(builder, text, style, startStyle, endStyle) {
for (var i = 0; i < text.length; ++i) {
if (i && i < text.length &&
builder.cm.options.lineWrapping &&
spanAffectsWrapping.test(text.slice(i - 1, i + 1)))
builder.pre.appendChild(elt("wbr"));
builder.measure[builder.pos++] =
buildToken(builder, text.charAt(i), style,
i == 0 && startStyle, i == text.length - 1 && endStyle);
}
if (text.length) builder.addedOne = true;
}
function buildCollapsedSpan(builder, size, widget) {
if (widget) {
if (!builder.display) widget = widget.cloneNode(true);
builder.pre.appendChild(widget);
if (builder.measure && size) {
builder.measure[builder.pos] = widget;
builder.addedOne = true;
}
}
builder.pos += size;
}
// Outputs a number of spans to make up a line, taking highlighting
// and marked text into account.
function insertLineContent(line, builder, styles) {
var spans = line.markedSpans;
if (!spans) {
for (var i = 1; i < styles.length; i+=2)
builder.addToken(builder, styles[i], styleToClass(styles[i+1]));
return;
}
var allText = line.text, len = allText.length;
var pos = 0, i = 1, text = "", style;
var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed;
for (;;) {
if (nextChange == pos) { // Update current marker set
spanStyle = spanEndStyle = spanStartStyle = "";
collapsed = null; nextChange = Infinity;
var foundBookmark = null;
for (var j = 0; j < spans.length; ++j) {
var sp = spans[j], m = sp.marker;
if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; }
if (m.className) spanStyle += " " + m.className;
if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
if (m.collapsed && (!collapsed || collapsed.marker.width < m.width))
collapsed = sp;
} else if (sp.from > pos && nextChange > sp.from) {
nextChange = sp.from;
}
if (m.type == "bookmark" && sp.from == pos && m.replacedWith)
foundBookmark = m.replacedWith;
}
if (collapsed && (collapsed.from || 0) == pos) {
buildCollapsedSpan(builder, (collapsed.to == null ? len : collapsed.to) - pos,
collapsed.from != null && collapsed.marker.replacedWith);
if (collapsed.to == null) return collapsed.marker.find();
}
if (foundBookmark && !collapsed) buildCollapsedSpan(builder, 0, foundBookmark);
}
if (pos >= len) break;
var upto = Math.min(len, nextChange);
while (true) {
if (text) {
var end = pos + text.length;
if (!collapsed) {
var tokenText = end > upto ? text.slice(0, upto - pos) : text;
builder.addToken(builder, tokenText, style + spanStyle,
spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "");
}
if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
pos = end;
spanStartStyle = "";
}
text = styles[i++]; style = styleToClass(styles[i++]);
}
}
}
// DOCUMENT DATA STRUCTURE
function LeafChunk(lines) {
this.lines = lines;
this.parent = null;
for (var i = 0, e = lines.length, height = 0; i < e; ++i) {
lines[i].parent = this;
height += lines[i].height;
}
this.height = height;
}
LeafChunk.prototype = {
chunkSize: function() { return this.lines.length; },
remove: function(at, n, cm) {
for (var i = at, e = at + n; i < e; ++i) {
var line = this.lines[i];
this.height -= line.height;
cleanUpLine(line);
signalLater(cm, line, "delete");
}
this.lines.splice(at, n);
},
collapse: function(lines) {
lines.splice.apply(lines, [lines.length, 0].concat(this.lines));
},
insertHeight: function(at, lines, height) {
this.height += height;
this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this;
},
iterN: function(at, n, op) {
for (var e = at + n; at < e; ++at)
if (op(this.lines[at])) return true;
}
};
function BranchChunk(children) {
this.children = children;
var size = 0, height = 0;
for (var i = 0, e = children.length; i < e; ++i) {
var ch = children[i];
size += ch.chunkSize(); height += ch.height;
ch.parent = this;
}
this.size = size;
this.height = height;
this.parent = null;
}
BranchChunk.prototype = {
chunkSize: function() { return this.size; },
remove: function(at, n, callbacks) {
this.size -= n;
for (var i = 0; i < this.children.length; ++i) {
var child = this.children[i], sz = child.chunkSize();
if (at < sz) {
var rm = Math.min(n, sz - at), oldHeight = child.height;
child.remove(at, rm, callbacks);
this.height -= oldHeight - child.height;
if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
if ((n -= rm) == 0) break;
at = 0;
} else at -= sz;
}
if (this.size - n < 25) {
var lines = [];
this.collapse(lines);
this.children = [new LeafChunk(lines)];
this.children[0].parent = this;
}
},
collapse: function(lines) {
for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines);
},
insert: function(at, lines) {
var height = 0;
for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;
this.insertHeight(at, lines, height);
},
insertHeight: function(at, lines, height) {
this.size += lines.length;
this.height += height;
for (var i = 0, e = this.children.length; i < e; ++i) {
var child = this.children[i], sz = child.chunkSize();
if (at <= sz) {
child.insertHeight(at, lines, height);
if (child.lines && child.lines.length > 50) {
while (child.lines.length > 50) {
var spilled = child.lines.splice(child.lines.length - 25, 25);
var newleaf = new LeafChunk(spilled);
child.height -= newleaf.height;
this.children.splice(i + 1, 0, newleaf);
newleaf.parent = this;
}
this.maybeSpill();
}
break;
}
at -= sz;
}
},
maybeSpill: function() {
if (this.children.length <= 10) return;
var me = this;
do {
var spilled = me.children.splice(me.children.length - 5, 5);
var sibling = new BranchChunk(spilled);
if (!me.parent) { // Become the parent node
var copy = new BranchChunk(me.children);
copy.parent = me;
me.children = [copy, sibling];
me = copy;
} else {
me.size -= sibling.size;
me.height -= sibling.height;
var myIndex = indexOf(me.parent.children, me);
me.parent.children.splice(myIndex + 1, 0, sibling);
}
sibling.parent = me.parent;
} while (me.children.length > 10);
me.parent.maybeSpill();
},
iter: function(from, to, op) { this.iterN(from, to - from, op); },
iterN: function(at, n, op) {
for (var i = 0, e = this.children.length; i < e; ++i) {
var child = this.children[i], sz = child.chunkSize();
if (at < sz) {
var used = Math.min(n, sz - at);
if (child.iterN(at, used, op)) return true;
if ((n -= used) == 0) break;
at = 0;
} else at -= sz;
}
}
};
// LINE UTILITIES
function getLine(chunk, n) {
while (!chunk.lines) {
for (var i = 0;; ++i) {
var child = chunk.children[i], sz = child.chunkSize();
if (n < sz) { chunk = child; break; }
n -= sz;
}
}
return chunk.lines[n];
}
function updateLineHeight(line, height) {
var diff = height - line.height;
for (var n = line; n; n = n.parent) n.height += diff;
}
function lineNo(line) {
if (line.parent == null) return null;
var cur = line.parent, no = indexOf(cur.lines, line);
for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
for (var i = 0;; ++i) {
if (chunk.children[i] == cur) break;
no += chunk.children[i].chunkSize();
}
}
return no;
}
function lineDoc(line) {
for (var d = line.parent; d.parent; d = d.parent) {}
return d;
}
function lineAtHeight(chunk, h) {
var n = 0;
outer: do {
for (var i = 0, e = chunk.children.length; i < e; ++i) {
var child = chunk.children[i], ch = child.height;
if (h < ch) { chunk = child; continue outer; }
h -= ch;
n += child.chunkSize();
}
return n;
} while (!chunk.lines);
for (var i = 0, e = chunk.lines.length; i < e; ++i) {
var line = chunk.lines[i], lh = line.height;
if (h < lh) break;
h -= lh;
}
return n + i;
}
function heightAtLine(cm, lineObj) {
lineObj = visualLine(cm.view.doc, lineObj);
var h = 0, chunk = lineObj.parent;
for (var i = 0; i < chunk.lines.length; ++i) {
var line = chunk.lines[i];
if (line == lineObj) break;
else h += line.height;
}
for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
for (var i = 0; i < p.children.length; ++i) {
var cur = p.children[i];
if (cur == chunk) break;
else h += cur.height;
}
}
return h;
}
function getOrder(line) {
var order = line.order;
if (order == null) order = line.order = bidiOrdering(line.text);
return order;
}
// HISTORY
function makeHistory() {
return {
// Arrays of history events. Doing something adds an event to
// done and clears undo. Undoing moves events from done to
// undone, redoing moves them in the other direction.
done: [], undone: [],
// Used to track when changes can be merged into a single undo
// event
lastTime: 0, lastOp: null, lastOrigin: null,
// Used by the isClean() method
dirtyCounter: 0
};
}
function addChange(cm, start, added, old, origin, fromBefore, toBefore, fromAfter, toAfter) {
var history = cm.view.history;
history.undone.length = 0;
var time = +new Date, cur = lst(history.done);
if (cur &&
(history.lastOp == cm.curOp.id ||
history.lastOrigin == origin && (origin == "input" || origin == "delete") &&
history.lastTime > time - 600)) {
// Merge this change into the last event
var last = lst(cur.events);
if (last.start > start + old.length || last.start + last.added < start) {
// Doesn't intersect with last sub-event, add new sub-event
cur.events.push({start: start, added: added, old: old});
} else {
// Patch up the last sub-event
var startBefore = Math.max(0, last.start - start),
endAfter = Math.max(0, (start + old.length) - (last.start + last.added));
for (var i = startBefore; i > 0; --i) last.old.unshift(old[i - 1]);
for (var i = endAfter; i > 0; --i) last.old.push(old[old.length - i]);
if (startBefore) last.start = start;
last.added += added - (old.length - startBefore - endAfter);
}
cur.fromAfter = fromAfter; cur.toAfter = toAfter;
} else {
// Can not be merged, start a new event.
cur = {events: [{start: start, added: added, old: old}],
fromBefore: fromBefore, toBefore: toBefore, fromAfter: fromAfter, toAfter: toAfter};
history.done.push(cur);
while (history.done.length > cm.options.undoDepth)
history.done.shift();
if (history.dirtyCounter < 0)
// The user has made a change after undoing past the last clean state.
// We can never get back to a clean state now until markClean() is called.
history.dirtyCounter = NaN;
else
history.dirtyCounter++;
}
history.lastTime = time;
history.lastOp = cm.curOp.id;
history.lastOrigin = origin;
}
// EVENT OPERATORS
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);}
CodeMirror.e_stop = e_stop;
CodeMirror.e_preventDefault = e_preventDefault;
CodeMirror.e_stopPropagation = e_stopPropagation;
function e_target(e) {return e.target || e.srcElement;}
function e_button(e) {
var b = e.which;
if (b == null) {
if (e.button & 1) b = 1;
else if (e.button & 2) b = 3;
else if (e.button & 4) b = 2;
}
if (mac && e.ctrlKey && b == 1) b = 3;
return b;
}
// Allow 3rd-party code to override event properties by adding an override
// object to an event object.
function e_prop(e, prop) {
var overridden = e.override && e.override.hasOwnProperty(prop);
return overridden ? e.override[prop] : e[prop];
}
// EVENT HANDLING
function on(emitter, type, f) {
if (emitter.addEventListener)
emitter.addEventListener(type, f, false);
else if (emitter.attachEvent)
emitter.attachEvent("on" + type, f);
else {
var map = emitter._handlers || (emitter._handlers = {});
var arr = map[type] || (map[type] = []);
arr.push(f);
}
}
function off(emitter, type, f) {
if (emitter.removeEventListener)
emitter.removeEventListener(type, f, false);
else if (emitter.detachEvent)
emitter.detachEvent("on" + type, f);
else {
var arr = emitter._handlers && emitter._handlers[type];
if (!arr) return;
for (var i = 0; i < arr.length; ++i)
if (arr[i] == f) { arr.splice(i, 1); break; }
}
}
function signal(emitter, type /*, values...*/) {
var arr = emitter._handlers && emitter._handlers[type];
if (!arr) return;
var args = Array.prototype.slice.call(arguments, 2);
for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
}
function signalLater(cm, emitter, type /*, values...*/) {
var arr = emitter._handlers && emitter._handlers[type];
if (!arr) return;
var args = Array.prototype.slice.call(arguments, 3), flist = cm.curOp && cm.curOp.delayedCallbacks;
function bnd(f) {return function(){f.apply(null, args);};};
for (var i = 0; i < arr.length; ++i)
if (flist) flist.push(bnd(arr[i]));
else arr[i].apply(null, args);
}
function hasHandler(emitter, type) {
var arr = emitter._handlers && emitter._handlers[type];
return arr && arr.length > 0;
}
CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal;
// MISC UTILITIES
// Number of pixels added to scroller and sizer to hide scrollbar
var scrollerCutOff = 30;
// Returned or thrown by various protocols to signal 'I'm not
// handling this'.
var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
function Delayed() {this.id = null;}
Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}};
// Counts the column offset in a string, taking tabs into account.
// Used mostly to find indentation.
function countColumn(string, end, tabSize) {
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;
}
CodeMirror.countColumn = countColumn;
var spaceStrs = [""];
function spaceStr(n) {
while (spaceStrs.length <= n)
spaceStrs.push(lst(spaceStrs) + " ");
return spaceStrs[n];
}
function lst(arr) { return arr[arr.length-1]; }
function selectInput(node) {
if (ios) { // Mobile Safari apparently has a bug where select() is broken.
node.selectionStart = 0;
node.selectionEnd = node.value.length;
} else node.select();
}
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;
}
function emptyArray(size) {
for (var a = [], i = 0; i < size; ++i) a.push(undefined);
return a;
}
function bind(f) {
var args = Array.prototype.slice.call(arguments, 1);
return function(){return f.apply(null, args);};
}
var nonASCIISingleCaseWordChar = /[\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc]/;
function isWordChar(ch) {
return /\w/.test(ch) || ch > "\x80" &&
(ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
}
function isEmpty(obj) {
var c = 0;
for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) ++c;
return !c;
}
var isExtendingChar = /[\u0300-\u036F\u0483-\u0487\u0488-\u0489\u0591-\u05BD\u05BF\u05C1-\u05C2\u05C4-\u05C5\u05C7\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7-\u06E8\u06EA-\u06ED\uA66F\uA670-\uA672\uA674-\uA67D\uA69F]/;
// DOM UTILITIES
function elt(tag, content, className, style) {
var e = document.createElement(tag);
if (className) e.className = className;
if (style) e.style.cssText = style;
if (typeof content == "string") setTextContent(e, content);
else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
return e;
}
function removeChildren(e) {
// IE will break all parent-child relations in subnodes when setting innerHTML
if (!ie) e.innerHTML = "";
else while (e.firstChild) e.removeChild(e.firstChild);
return e;
}
function removeChildrenAndAdd(parent, e) {
return removeChildren(parent).appendChild(e);
}
function setTextContent(e, str) {
if (ie_lt9) {
e.innerHTML = "";
e.appendChild(document.createTextNode(str));
} else e.textContent = str;
}
// FEATURE DETECTION
// Detect drag-and-drop
var dragAndDrop = function() {
// There is *some* kind of drag-and-drop support in IE6-8, but I
// couldn't get it to work yet.
if (ie_lt9) return false;
var div = elt('div');
return "draggable" in div || "dragDrop" in div;
}();
// For a reason I have yet to figure out, some browsers disallow
// word wrapping between certain characters *only* if a new inline
// element is started between them. This makes it hard to reliably
// measure the position of things, since that requires inserting an
// extra span. This terribly fragile set of regexps matches the
// character combinations that suffer from this phenomenon on the
// various browsers.
var spanAffectsWrapping = /^$/; // Won't match any two-character string
if (gecko) spanAffectsWrapping = /$'/;
else if (safari) spanAffectsWrapping = /\-[^ \-?]|\?[^ !'\"\),.\-\/:;\?\]\}]/;
else if (chrome) spanAffectsWrapping = /\-[^ \-\.?]|\?[^ \-\.?\]\}:;!'\"\),\/]|[\.!\"#&%\)*+,:;=>\]|\}~][\(\{\[<]|\$'/;
var knownScrollbarWidth;
function scrollbarWidth(measure) {
if (knownScrollbarWidth != null) return knownScrollbarWidth;
var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll");
removeChildrenAndAdd(measure, test);
if (test.offsetWidth)
knownScrollbarWidth = test.offsetHeight - test.clientHeight;
return knownScrollbarWidth || 0;
}
var zwspSupported;
function zeroWidthElement(measure) {
if (zwspSupported == null) {
var test = elt("span", "\u200b");
removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
if (measure.firstChild.offsetHeight != 0)
zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_lt8;
}
if (zwspSupported) return elt("span", "\u200b");
else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
}
// See if "".split is the broken IE version, if so, provide an
// alternative way to split lines.
var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
var pos = 0, result = [], l = string.length;
while (pos <= l) {
var nl = string.indexOf("\n", pos);
if (nl == -1) nl = string.length;
var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
var rt = line.indexOf("\r");
if (rt != -1) {
result.push(line.slice(0, rt));
pos += rt + 1;
} else {
result.push(line);
pos = nl + 1;
}
}
return result;
} : function(string){return string.split(/\r\n?|\n/);};
CodeMirror.splitLines = splitLines;
var hasSelection = window.getSelection ? function(te) {
try { return te.selectionStart != te.selectionEnd; }
catch(e) { return false; }
} : function(te) {
try {var range = te.ownerDocument.selection.createRange();}
catch(e) {}
if (!range || range.parentElement() != te) return false;
return range.compareEndPoints("StartToEnd", range) != 0;
};
var hasCopyEvent = (function() {
var e = elt("div");
if ("oncopy" in e) return true;
e.setAttribute("oncopy", "return;");
return typeof e.oncopy == 'function';
})();
// KEY NAMING
var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
46: "Delete", 59: ";", 91: "Mod", 92: "Mod", 93: "Mod", 109: "-", 107: "=", 127: "Delete",
186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
221: "]", 222: "'", 63276: "PageUp", 63277: "PageDown", 63275: "End", 63273: "Home",
63234: "Left", 63232: "Up", 63235: "Right", 63233: "Down", 63302: "Insert", 63272: "Delete"};
CodeMirror.keyNames = keyNames;
(function() {
// Number keys
for (var i = 0; i < 10; i++) keyNames[i + 48] = String(i);
// Alphabetic keys
for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
// Function keys
for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
})();
// BIDI HELPERS
function iterateBidiSections(order, from, to, f) {
if (!order) return f(from, to, "ltr");
for (var i = 0; i < order.length; ++i) {
var part = order[i];
if (part.from < to && part.to > from || from == to && part.to == from)
f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
}
}
function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
function lineRight(line) {
var order = getOrder(line);
if (!order) return line.text.length;
return bidiRight(lst(order));
}
function lineStart(cm, lineN) {
var line = getLine(cm.view.doc, lineN);
var visual = visualLine(cm.view.doc, line);
if (visual != line) lineN = lineNo(visual);
var order = getOrder(visual);
var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
return {line: lineN, ch: ch};
}
function lineEnd(cm, lineNo) {
var merged, line;
while (merged = collapsedSpanAtEnd(line = getLine(cm.view.doc, lineNo)))
lineNo = merged.find().to.line;
var order = getOrder(line);
var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
return {line: lineNo, ch: ch};
}
// This is somewhat involved. It is needed in order to move
// 'visually' through bi-directional text -- i.e., pressing left
// should make the cursor go left, even when in RTL text. The
// tricky part is the 'jumps', where RTL and LTR text touch each
// other. This often requires the cursor offset to move more than
// one unit, in order to visually move one unit.
function moveVisually(line, start, dir, byUnit) {
var bidi = getOrder(line);
if (!bidi) return moveLogically(line, start, dir, byUnit);
var moveOneUnit = byUnit ? function(pos, dir) {
do pos += dir;
while (pos > 0 && isExtendingChar.test(line.text.charAt(pos)));
return pos;
} : function(pos, dir) { return pos + dir; };
var linedir = bidi[0].level;
for (var i = 0; i < bidi.length; ++i) {
var part = bidi[i], sticky = part.level % 2 == linedir;
if ((part.from < start && part.to > start) ||
(sticky && (part.from == start || part.to == start))) break;
}
var target = moveOneUnit(start, part.level % 2 ? -dir : dir);
while (target != null) {
if (part.level % 2 == linedir) {
if (target < part.from || target > part.to) {
part = bidi[i += dir];
target = part && (dir > 0 == part.level % 2 ? moveOneUnit(part.to, -1) : moveOneUnit(part.from, 1));
} else break;
} else {
if (target == bidiLeft(part)) {
part = bidi[--i];
target = part && bidiRight(part);
} else if (target == bidiRight(part)) {
part = bidi[++i];
target = part && bidiLeft(part);
} else break;
}
}
return target < 0 || target > line.text.length ? null : target;
}
function moveLogically(line, start, dir, byUnit) {
var target = start + dir;
if (byUnit) while (target > 0 && isExtendingChar.test(line.text.charAt(target))) target += dir;
return target < 0 || target > line.text.length ? null : target;
}
// Bidirectional ordering algorithm
// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
// that this (partially) implements.
// One-char codes used for character types:
// L (L): Left-to-Right
// R (R): Right-to-Left
// r (AL): Right-to-Left Arabic
// 1 (EN): European Number
// + (ES): European Number Separator
// % (ET): European Number Terminator
// n (AN): Arabic Number
// , (CS): Common Number Separator
// m (NSM): Non-Spacing Mark
// b (BN): Boundary Neutral
// s (B): Paragraph Separator
// t (S): Segment Separator
// w (WS): Whitespace
// N (ON): Other Neutrals
// Returns null if characters are ordered as they appear
// (left-to-right), or an array of sections ({from, to, level}
// objects) in the order in which they occur visually.
var bidiOrdering = (function() {
// Character types for codepoints 0 to 0xff
var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLL";
// Character types for codepoints 0x600 to 0x6ff
var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmmrrrrrrrrrrrrrrrrrr";
function charType(code) {
if (code <= 0xff) return lowTypes.charAt(code);
else if (0x590 <= code && code <= 0x5f4) return "R";
else if (0x600 <= code && code <= 0x6ff) return arabicTypes.charAt(code - 0x600);
else if (0x700 <= code && code <= 0x8ac) return "r";
else return "L";
}
var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
// Browsers seem to always treat the boundaries of block elements as being L.
var outerType = "L";
return function charOrdering(str) {
if (!bidiRE.test(str)) return false;
var len = str.length, types = [];
for (var i = 0, type; i < len; ++i)
types.push(type = charType(str.charCodeAt(i)));
// W1. Examine each non-spacing mark (NSM) in the level run, and
// change the type of the NSM to the type of the previous
// character. If the NSM is at the start of the level run, it will
// get the type of sor.
for (var i = 0, prev = outerType; i < len; ++i) {
var type = types[i];
if (type == "m") types[i] = prev;
else prev = type;
}
// W2. Search backwards from each instance of a European number
// until the first strong type (R, L, AL, or sor) is found. If an
// AL is found, change the type of the European number to Arabic
// number.
// W3. Change all ALs to R.
for (var i = 0, cur = outerType; i < len; ++i) {
var type = types[i];
if (type == "1" && cur == "r") types[i] = "n";
else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
}
// W4. A single European separator between two European numbers
// changes to a European number. A single common separator between
// two numbers of the same type changes to that type.
for (var i = 1, prev = types[0]; i < len - 1; ++i) {
var type = types[i];
if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
else if (type == "," && prev == types[i+1] &&
(prev == "1" || prev == "n")) types[i] = prev;
prev = type;
}
// W5. A sequence of European terminators adjacent to European
// numbers changes to all European numbers.
// W6. Otherwise, separators and terminators change to Other
// Neutral.
for (var i = 0; i < len; ++i) {
var type = types[i];
if (type == ",") types[i] = "N";
else if (type == "%") {
for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
var replace = (i && types[i-1] == "!") || (end < len - 1 && types[end] == "1") ? "1" : "N";
for (var j = i; j < end; ++j) types[j] = replace;
i = end - 1;
}
}
// W7. Search backwards from each instance of a European number
// until the first strong type (R, L, or sor) is found. If an L is
// found, then change the type of the European number to L.
for (var i = 0, cur = outerType; i < len; ++i) {
var type = types[i];
if (cur == "L" && type == "1") types[i] = "L";
else if (isStrong.test(type)) cur = type;
}
// N1. A sequence of neutrals takes the direction of the
// surrounding strong text if the text on both sides has the same
// direction. European and Arabic numbers act as if they were R in
// terms of their influence on neutrals. Start-of-level-run (sor)
// and end-of-level-run (eor) are used at level run boundaries.
// N2. Any remaining neutrals take the embedding direction.
for (var i = 0; i < len; ++i) {
if (isNeutral.test(types[i])) {
for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
var before = (i ? types[i-1] : outerType) == "L";
var after = (end < len - 1 ? types[end] : outerType) == "L";
var replace = before || after ? "L" : "R";
for (var j = i; j < end; ++j) types[j] = replace;
i = end - 1;
}
}
// Here we depart from the documented algorithm, in order to avoid
// building up an actual levels array. Since there are only three
// levels (0, 1, 2) in an implementation that doesn't take
// explicit embedding into account, we can build up the order on
// the fly, without following the level-based algorithm.
var order = [], m;
for (var i = 0; i < len;) {
if (countsAsLeft.test(types[i])) {
var start = i;
for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
order.push({from: start, to: i, level: 0});
} else {
var pos = i, at = order.length;
for (++i; i < len && types[i] != "L"; ++i) {}
for (var j = pos; j < i;) {
if (countsAsNum.test(types[j])) {
if (pos < j) order.splice(at, 0, {from: pos, to: j, level: 1});
var nstart = j;
for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
order.splice(at, 0, {from: nstart, to: j, level: 2});
pos = j;
} else ++j;
}
if (pos < i) order.splice(at, 0, {from: pos, to: i, level: 1});
}
}
if (order[0].level == 1 && (m = str.match(/^\s+/))) {
order[0].from = m[0].length;
order.unshift({from: 0, to: m[0].length, level: 0});
}
if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
lst(order).to -= m[0].length;
order.push({from: len - m[0].length, to: len, level: 0});
}
if (order[0].level != lst(order).level)
order.push({from: len, to: len, level: order[0].level});
return order;
};
})();
// THE END
CodeMirror.version = "3.01";
return CodeMirror;
})();