| Current File : //proc/self/root/usr/share/nodejs/codemirror/addon/merge/merge.js |
// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE
// declare global: diff_match_patch, DIFF_INSERT, DIFF_DELETE, DIFF_EQUAL
(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
mod(require("../../lib/codemirror")); // Note non-packaged dependency diff_match_patch
else if (typeof define == "function" && define.amd) // AMD
define(["../../lib/codemirror", "diff_match_patch"], mod);
else // Plain browser env
mod(CodeMirror);
})(function(CodeMirror) {
"use strict";
var Pos = CodeMirror.Pos;
var svgNS = "http://www.w3.org/2000/svg";
function DiffView(mv, type) {
this.mv = mv;
this.type = type;
this.classes = type == "left"
? {chunk: "CodeMirror-merge-l-chunk",
start: "CodeMirror-merge-l-chunk-start",
end: "CodeMirror-merge-l-chunk-end",
insert: "CodeMirror-merge-l-inserted",
del: "CodeMirror-merge-l-deleted",
connect: "CodeMirror-merge-l-connect"}
: {chunk: "CodeMirror-merge-r-chunk",
start: "CodeMirror-merge-r-chunk-start",
end: "CodeMirror-merge-r-chunk-end",
insert: "CodeMirror-merge-r-inserted",
del: "CodeMirror-merge-r-deleted",
connect: "CodeMirror-merge-r-connect"};
}
DiffView.prototype = {
constructor: DiffView,
init: function(pane, orig, options) {
this.edit = this.mv.edit;
;(this.edit.state.diffViews || (this.edit.state.diffViews = [])).push(this);
this.orig = CodeMirror(pane, copyObj({value: orig, readOnly: !this.mv.options.allowEditingOriginals}, copyObj(options)));
if (this.mv.options.connect == "align") {
if (!this.edit.state.trackAlignable) this.edit.state.trackAlignable = new TrackAlignable(this.edit)
this.orig.state.trackAlignable = new TrackAlignable(this.orig)
}
this.lockButton.title = this.edit.phrase("Toggle locked scrolling");
this.orig.state.diffViews = [this];
var classLocation = options.chunkClassLocation || "background";
if (Object.prototype.toString.call(classLocation) != "[object Array]") classLocation = [classLocation]
this.classes.classLocation = classLocation
this.diff = getDiff(asString(orig), asString(options.value), this.mv.options.ignoreWhitespace);
this.chunks = getChunks(this.diff);
this.diffOutOfDate = this.dealigned = false;
this.needsScrollSync = null
this.showDifferences = options.showDifferences !== false;
},
registerEvents: function(otherDv) {
this.forceUpdate = registerUpdate(this);
setScrollLock(this, true, false);
registerScroll(this, otherDv);
},
setShowDifferences: function(val) {
val = val !== false;
if (val != this.showDifferences) {
this.showDifferences = val;
this.forceUpdate("full");
}
}
};
function ensureDiff(dv) {
if (dv.diffOutOfDate) {
dv.diff = getDiff(dv.orig.getValue(), dv.edit.getValue(), dv.mv.options.ignoreWhitespace);
dv.chunks = getChunks(dv.diff);
dv.diffOutOfDate = false;
CodeMirror.signal(dv.edit, "updateDiff", dv.diff);
}
}
var updating = false;
function registerUpdate(dv) {
var edit = {from: 0, to: 0, marked: []};
var orig = {from: 0, to: 0, marked: []};
var debounceChange, updatingFast = false;
function update(mode) {
updating = true;
updatingFast = false;
if (mode == "full") {
if (dv.svg) clear(dv.svg);
if (dv.copyButtons) clear(dv.copyButtons);
clearMarks(dv.edit, edit.marked, dv.classes);
clearMarks(dv.orig, orig.marked, dv.classes);
edit.from = edit.to = orig.from = orig.to = 0;
}
ensureDiff(dv);
if (dv.showDifferences) {
updateMarks(dv.edit, dv.diff, edit, DIFF_INSERT, dv.classes);
updateMarks(dv.orig, dv.diff, orig, DIFF_DELETE, dv.classes);
}
if (dv.mv.options.connect == "align")
alignChunks(dv);
makeConnections(dv);
if (dv.needsScrollSync != null) syncScroll(dv, dv.needsScrollSync)
updating = false;
}
function setDealign(fast) {
if (updating) return;
dv.dealigned = true;
set(fast);
}
function set(fast) {
if (updating || updatingFast) return;
clearTimeout(debounceChange);
if (fast === true) updatingFast = true;
debounceChange = setTimeout(update, fast === true ? 20 : 250);
}
function change(_cm, change) {
if (!dv.diffOutOfDate) {
dv.diffOutOfDate = true;
edit.from = edit.to = orig.from = orig.to = 0;
}
// Update faster when a line was added/removed
setDealign(change.text.length - 1 != change.to.line - change.from.line);
}
function swapDoc() {
dv.diffOutOfDate = true;
dv.dealigned = true;
update("full");
}
dv.edit.on("change", change);
dv.orig.on("change", change);
dv.edit.on("swapDoc", swapDoc);
dv.orig.on("swapDoc", swapDoc);
if (dv.mv.options.connect == "align") {
CodeMirror.on(dv.edit.state.trackAlignable, "realign", setDealign)
CodeMirror.on(dv.orig.state.trackAlignable, "realign", setDealign)
}
dv.edit.on("viewportChange", function() { set(false); });
dv.orig.on("viewportChange", function() { set(false); });
update();
return update;
}
function registerScroll(dv, otherDv) {
dv.edit.on("scroll", function() {
syncScroll(dv, true) && makeConnections(dv);
});
dv.orig.on("scroll", function() {
syncScroll(dv, false) && makeConnections(dv);
if (otherDv) syncScroll(otherDv, true) && makeConnections(otherDv);
});
}
function syncScroll(dv, toOrig) {
// Change handler will do a refresh after a timeout when diff is out of date
if (dv.diffOutOfDate) {
if (dv.lockScroll && dv.needsScrollSync == null) dv.needsScrollSync = toOrig
return false
}
dv.needsScrollSync = null
if (!dv.lockScroll) return true;
var editor, other, now = +new Date;
if (toOrig) { editor = dv.edit; other = dv.orig; }
else { editor = dv.orig; other = dv.edit; }
// Don't take action if the position of this editor was recently set
// (to prevent feedback loops)
if (editor.state.scrollSetBy == dv && (editor.state.scrollSetAt || 0) + 250 > now) return false;
var sInfo = editor.getScrollInfo();
if (dv.mv.options.connect == "align") {
targetPos = sInfo.top;
} else {
var halfScreen = .5 * sInfo.clientHeight, midY = sInfo.top + halfScreen;
var mid = editor.lineAtHeight(midY, "local");
var around = chunkBoundariesAround(dv.chunks, mid, toOrig);
var off = getOffsets(editor, toOrig ? around.edit : around.orig);
var offOther = getOffsets(other, toOrig ? around.orig : around.edit);
var ratio = (midY - off.top) / (off.bot - off.top);
var targetPos = (offOther.top - halfScreen) + ratio * (offOther.bot - offOther.top);
var botDist, mix;
// Some careful tweaking to make sure no space is left out of view
// when scrolling to top or bottom.
if (targetPos > sInfo.top && (mix = sInfo.top / halfScreen) < 1) {
targetPos = targetPos * mix + sInfo.top * (1 - mix);
} else if ((botDist = sInfo.height - sInfo.clientHeight - sInfo.top) < halfScreen) {
var otherInfo = other.getScrollInfo();
var botDistOther = otherInfo.height - otherInfo.clientHeight - targetPos;
if (botDistOther > botDist && (mix = botDist / halfScreen) < 1)
targetPos = targetPos * mix + (otherInfo.height - otherInfo.clientHeight - botDist) * (1 - mix);
}
}
other.scrollTo(sInfo.left, targetPos);
other.state.scrollSetAt = now;
other.state.scrollSetBy = dv;
return true;
}
function getOffsets(editor, around) {
var bot = around.after;
if (bot == null) bot = editor.lastLine() + 1;
return {top: editor.heightAtLine(around.before || 0, "local"),
bot: editor.heightAtLine(bot, "local")};
}
function setScrollLock(dv, val, action) {
dv.lockScroll = val;
if (val && action != false) syncScroll(dv, DIFF_INSERT) && makeConnections(dv);
(val ? CodeMirror.addClass : CodeMirror.rmClass)(dv.lockButton, "CodeMirror-merge-scrolllock-enabled");
}
// Updating the marks for editor content
function removeClass(editor, line, classes) {
var locs = classes.classLocation
for (var i = 0; i < locs.length; i++) {
editor.removeLineClass(line, locs[i], classes.chunk);
editor.removeLineClass(line, locs[i], classes.start);
editor.removeLineClass(line, locs[i], classes.end);
}
}
function clearMarks(editor, arr, classes) {
for (var i = 0; i < arr.length; ++i) {
var mark = arr[i];
if (mark instanceof CodeMirror.TextMarker)
mark.clear();
else if (mark.parent)
removeClass(editor, mark, classes);
}
arr.length = 0;
}
// FIXME maybe add a margin around viewport to prevent too many updates
function updateMarks(editor, diff, state, type, classes) {
var vp = editor.getViewport();
editor.operation(function() {
if (state.from == state.to || vp.from - state.to > 20 || state.from - vp.to > 20) {
clearMarks(editor, state.marked, classes);
markChanges(editor, diff, type, state.marked, vp.from, vp.to, classes);
state.from = vp.from; state.to = vp.to;
} else {
if (vp.from < state.from) {
markChanges(editor, diff, type, state.marked, vp.from, state.from, classes);
state.from = vp.from;
}
if (vp.to > state.to) {
markChanges(editor, diff, type, state.marked, state.to, vp.to, classes);
state.to = vp.to;
}
}
});
}
function addClass(editor, lineNr, classes, main, start, end) {
var locs = classes.classLocation, line = editor.getLineHandle(lineNr);
for (var i = 0; i < locs.length; i++) {
if (main) editor.addLineClass(line, locs[i], classes.chunk);
if (start) editor.addLineClass(line, locs[i], classes.start);
if (end) editor.addLineClass(line, locs[i], classes.end);
}
return line;
}
function markChanges(editor, diff, type, marks, from, to, classes) {
var pos = Pos(0, 0);
var top = Pos(from, 0), bot = editor.clipPos(Pos(to - 1));
var cls = type == DIFF_DELETE ? classes.del : classes.insert;
function markChunk(start, end) {
var bfrom = Math.max(from, start), bto = Math.min(to, end);
for (var i = bfrom; i < bto; ++i)
marks.push(addClass(editor, i, classes, true, i == start, i == end - 1));
// When the chunk is empty, make sure a horizontal line shows up
if (start == end && bfrom == end && bto == end) {
if (bfrom)
marks.push(addClass(editor, bfrom - 1, classes, false, false, true));
else
marks.push(addClass(editor, bfrom, classes, false, true, false));
}
}
var chunkStart = 0, pending = false;
for (var i = 0; i < diff.length; ++i) {
var part = diff[i], tp = part[0], str = part[1];
if (tp == DIFF_EQUAL) {
var cleanFrom = pos.line + (startOfLineClean(diff, i) ? 0 : 1);
moveOver(pos, str);
var cleanTo = pos.line + (endOfLineClean(diff, i) ? 1 : 0);
if (cleanTo > cleanFrom) {
if (pending) { markChunk(chunkStart, cleanFrom); pending = false }
chunkStart = cleanTo;
}
} else {
pending = true
if (tp == type) {
var end = moveOver(pos, str, true);
var a = posMax(top, pos), b = posMin(bot, end);
if (!posEq(a, b))
marks.push(editor.markText(a, b, {className: cls}));
pos = end;
}
}
}
if (pending) markChunk(chunkStart, pos.line + 1);
}
// Updating the gap between editor and original
function makeConnections(dv) {
if (!dv.showDifferences) return;
if (dv.svg) {
clear(dv.svg);
var w = dv.gap.offsetWidth;
attrs(dv.svg, "width", w, "height", dv.gap.offsetHeight);
}
if (dv.copyButtons) clear(dv.copyButtons);
var vpEdit = dv.edit.getViewport(), vpOrig = dv.orig.getViewport();
var outerTop = dv.mv.wrap.getBoundingClientRect().top
var sTopEdit = outerTop - dv.edit.getScrollerElement().getBoundingClientRect().top + dv.edit.getScrollInfo().top
var sTopOrig = outerTop - dv.orig.getScrollerElement().getBoundingClientRect().top + dv.orig.getScrollInfo().top;
for (var i = 0; i < dv.chunks.length; i++) {
var ch = dv.chunks[i];
if (ch.editFrom <= vpEdit.to && ch.editTo >= vpEdit.from &&
ch.origFrom <= vpOrig.to && ch.origTo >= vpOrig.from)
drawConnectorsForChunk(dv, ch, sTopOrig, sTopEdit, w);
}
}
function getMatchingOrigLine(editLine, chunks) {
var editStart = 0, origStart = 0;
for (var i = 0; i < chunks.length; i++) {
var chunk = chunks[i];
if (chunk.editTo > editLine && chunk.editFrom <= editLine) return null;
if (chunk.editFrom > editLine) break;
editStart = chunk.editTo;
origStart = chunk.origTo;
}
return origStart + (editLine - editStart);
}
// Combines information about chunks and widgets/markers to return
// an array of lines, in a single editor, that probably need to be
// aligned with their counterparts in the editor next to it.
function alignableFor(cm, chunks, isOrig) {
var tracker = cm.state.trackAlignable
var start = cm.firstLine(), trackI = 0
var result = []
for (var i = 0;; i++) {
var chunk = chunks[i]
var chunkStart = !chunk ? 1e9 : isOrig ? chunk.origFrom : chunk.editFrom
for (; trackI < tracker.alignable.length; trackI += 2) {
var n = tracker.alignable[trackI] + 1
if (n <= start) continue
if (n <= chunkStart) result.push(n)
else break
}
if (!chunk) break
result.push(start = isOrig ? chunk.origTo : chunk.editTo)
}
return result
}
// Given information about alignable lines in two editors, fill in
// the result (an array of three-element arrays) to reflect the
// lines that need to be aligned with each other.
function mergeAlignable(result, origAlignable, chunks, setIndex) {
var rI = 0, origI = 0, chunkI = 0, diff = 0
outer: for (;; rI++) {
var nextR = result[rI], nextO = origAlignable[origI]
if (!nextR && nextO == null) break
var rLine = nextR ? nextR[0] : 1e9, oLine = nextO == null ? 1e9 : nextO
while (chunkI < chunks.length) {
var chunk = chunks[chunkI]
if (chunk.origFrom <= oLine && chunk.origTo > oLine) {
origI++
rI--
continue outer;
}
if (chunk.editTo > rLine) {
if (chunk.editFrom <= rLine) continue outer;
break
}
diff += (chunk.origTo - chunk.origFrom) - (chunk.editTo - chunk.editFrom)
chunkI++
}
if (rLine == oLine - diff) {
nextR[setIndex] = oLine
origI++
} else if (rLine < oLine - diff) {
nextR[setIndex] = rLine + diff
} else {
var record = [oLine - diff, null, null]
record[setIndex] = oLine
result.splice(rI, 0, record)
origI++
}
}
}
function findAlignedLines(dv, other) {
var alignable = alignableFor(dv.edit, dv.chunks, false), result = []
if (other) for (var i = 0, j = 0; i < other.chunks.length; i++) {
var n = other.chunks[i].editTo
while (j < alignable.length && alignable[j] < n) j++
if (j == alignable.length || alignable[j] != n) alignable.splice(j++, 0, n)
}
for (var i = 0; i < alignable.length; i++)
result.push([alignable[i], null, null])
mergeAlignable(result, alignableFor(dv.orig, dv.chunks, true), dv.chunks, 1)
if (other)
mergeAlignable(result, alignableFor(other.orig, other.chunks, true), other.chunks, 2)
return result
}
function alignChunks(dv, force) {
if (!dv.dealigned && !force) return;
if (!dv.orig.curOp) return dv.orig.operation(function() {
alignChunks(dv, force);
});
dv.dealigned = false;
var other = dv.mv.left == dv ? dv.mv.right : dv.mv.left;
if (other) {
ensureDiff(other);
other.dealigned = false;
}
var linesToAlign = findAlignedLines(dv, other);
// Clear old aligners
var aligners = dv.mv.aligners;
for (var i = 0; i < aligners.length; i++)
aligners[i].clear();
aligners.length = 0;
var cm = [dv.edit, dv.orig], scroll = [], offset = []
if (other) cm.push(other.orig);
for (var i = 0; i < cm.length; i++) {
scroll.push(cm[i].getScrollInfo().top);
offset.push(-cm[i].getScrollerElement().getBoundingClientRect().top)
}
if (offset[0] != offset[1] || cm.length == 3 && offset[1] != offset[2])
alignLines(cm, offset, [0, 0, 0], aligners)
for (var ln = 0; ln < linesToAlign.length; ln++)
alignLines(cm, offset, linesToAlign[ln], aligners);
for (var i = 0; i < cm.length; i++)
cm[i].scrollTo(null, scroll[i]);
}
function alignLines(cm, cmOffset, lines, aligners) {
var maxOffset = -1e8, offset = [];
for (var i = 0; i < cm.length; i++) if (lines[i] != null) {
var off = cm[i].heightAtLine(lines[i], "local") - cmOffset[i];
offset[i] = off;
maxOffset = Math.max(maxOffset, off);
}
for (var i = 0; i < cm.length; i++) if (lines[i] != null) {
var diff = maxOffset - offset[i];
if (diff > 1)
aligners.push(padAbove(cm[i], lines[i], diff));
}
}
function padAbove(cm, line, size) {
var above = true;
if (line > cm.lastLine()) {
line--;
above = false;
}
var elt = document.createElement("div");
elt.className = "CodeMirror-merge-spacer";
elt.style.height = size + "px"; elt.style.minWidth = "1px";
return cm.addLineWidget(line, elt, {height: size, above: above, mergeSpacer: true, handleMouseEvents: true});
}
function drawConnectorsForChunk(dv, chunk, sTopOrig, sTopEdit, w) {
var flip = dv.type == "left";
var top = dv.orig.heightAtLine(chunk.origFrom, "local", true) - sTopOrig;
if (dv.svg) {
var topLpx = top;
var topRpx = dv.edit.heightAtLine(chunk.editFrom, "local", true) - sTopEdit;
if (flip) { var tmp = topLpx; topLpx = topRpx; topRpx = tmp; }
var botLpx = dv.orig.heightAtLine(chunk.origTo, "local", true) - sTopOrig;
var botRpx = dv.edit.heightAtLine(chunk.editTo, "local", true) - sTopEdit;
if (flip) { var tmp = botLpx; botLpx = botRpx; botRpx = tmp; }
var curveTop = " C " + w/2 + " " + topRpx + " " + w/2 + " " + topLpx + " " + (w + 2) + " " + topLpx;
var curveBot = " C " + w/2 + " " + botLpx + " " + w/2 + " " + botRpx + " -1 " + botRpx;
attrs(dv.svg.appendChild(document.createElementNS(svgNS, "path")),
"d", "M -1 " + topRpx + curveTop + " L " + (w + 2) + " " + botLpx + curveBot + " z",
"class", dv.classes.connect);
}
if (dv.copyButtons) {
var copy = dv.copyButtons.appendChild(elt("div", dv.type == "left" ? "\u21dd" : "\u21dc",
"CodeMirror-merge-copy"));
var editOriginals = dv.mv.options.allowEditingOriginals;
copy.title = dv.edit.phrase(editOriginals ? "Push to left" : "Revert chunk");
copy.chunk = chunk;
copy.style.top = (chunk.origTo > chunk.origFrom ? top : dv.edit.heightAtLine(chunk.editFrom, "local") - sTopEdit) + "px";
copy.setAttribute("role", "button");
if (editOriginals) {
var topReverse = dv.edit.heightAtLine(chunk.editFrom, "local") - sTopEdit;
var copyReverse = dv.copyButtons.appendChild(elt("div", dv.type == "right" ? "\u21dd" : "\u21dc",
"CodeMirror-merge-copy-reverse"));
copyReverse.title = "Push to right";
copyReverse.chunk = {editFrom: chunk.origFrom, editTo: chunk.origTo,
origFrom: chunk.editFrom, origTo: chunk.editTo};
copyReverse.style.top = topReverse + "px";
dv.type == "right" ? copyReverse.style.left = "2px" : copyReverse.style.right = "2px";
copyReverse.setAttribute("role", "button");
}
}
}
function copyChunk(dv, to, from, chunk) {
if (dv.diffOutOfDate) return;
var origStart = chunk.origTo > from.lastLine() ? Pos(chunk.origFrom - 1) : Pos(chunk.origFrom, 0)
var origEnd = Pos(chunk.origTo, 0)
var editStart = chunk.editTo > to.lastLine() ? Pos(chunk.editFrom - 1) : Pos(chunk.editFrom, 0)
var editEnd = Pos(chunk.editTo, 0)
var handler = dv.mv.options.revertChunk
if (handler)
handler(dv.mv, from, origStart, origEnd, to, editStart, editEnd)
else
to.replaceRange(from.getRange(origStart, origEnd), editStart, editEnd)
}
// Merge view, containing 0, 1, or 2 diff views.
var MergeView = CodeMirror.MergeView = function(node, options) {
if (!(this instanceof MergeView)) return new MergeView(node, options);
this.options = options;
var origLeft = options.origLeft, origRight = options.origRight == null ? options.orig : options.origRight;
var hasLeft = origLeft != null, hasRight = origRight != null;
var panes = 1 + (hasLeft ? 1 : 0) + (hasRight ? 1 : 0);
var wrap = [], left = this.left = null, right = this.right = null;
var self = this;
if (hasLeft) {
left = this.left = new DiffView(this, "left");
var leftPane = elt("div", null, "CodeMirror-merge-pane CodeMirror-merge-left");
wrap.push(leftPane);
wrap.push(buildGap(left));
}
var editPane = elt("div", null, "CodeMirror-merge-pane CodeMirror-merge-editor");
wrap.push(editPane);
if (hasRight) {
right = this.right = new DiffView(this, "right");
wrap.push(buildGap(right));
var rightPane = elt("div", null, "CodeMirror-merge-pane CodeMirror-merge-right");
wrap.push(rightPane);
}
(hasRight ? rightPane : editPane).className += " CodeMirror-merge-pane-rightmost";
wrap.push(elt("div", null, null, "height: 0; clear: both;"));
var wrapElt = this.wrap = node.appendChild(elt("div", wrap, "CodeMirror-merge CodeMirror-merge-" + panes + "pane"));
this.edit = CodeMirror(editPane, copyObj(options));
if (left) left.init(leftPane, origLeft, options);
if (right) right.init(rightPane, origRight, options);
if (options.collapseIdentical)
this.editor().operation(function() {
collapseIdenticalStretches(self, options.collapseIdentical);
});
if (options.connect == "align") {
this.aligners = [];
alignChunks(this.left || this.right, true);
}
if (left) left.registerEvents(right)
if (right) right.registerEvents(left)
var onResize = function() {
if (left) makeConnections(left);
if (right) makeConnections(right);
};
CodeMirror.on(window, "resize", onResize);
var resizeInterval = setInterval(function() {
for (var p = wrapElt.parentNode; p && p != document.body; p = p.parentNode) {}
if (!p) { clearInterval(resizeInterval); CodeMirror.off(window, "resize", onResize); }
}, 5000);
};
function buildGap(dv) {
var lock = dv.lockButton = elt("div", null, "CodeMirror-merge-scrolllock");
lock.setAttribute("role", "button");
var lockWrap = elt("div", [lock], "CodeMirror-merge-scrolllock-wrap");
CodeMirror.on(lock, "click", function() { setScrollLock(dv, !dv.lockScroll); });
var gapElts = [lockWrap];
if (dv.mv.options.revertButtons !== false) {
dv.copyButtons = elt("div", null, "CodeMirror-merge-copybuttons-" + dv.type);
CodeMirror.on(dv.copyButtons, "click", function(e) {
var node = e.target || e.srcElement;
if (!node.chunk) return;
if (node.className == "CodeMirror-merge-copy-reverse") {
copyChunk(dv, dv.orig, dv.edit, node.chunk);
return;
}
copyChunk(dv, dv.edit, dv.orig, node.chunk);
});
gapElts.unshift(dv.copyButtons);
}
if (dv.mv.options.connect != "align") {
var svg = document.createElementNS && document.createElementNS(svgNS, "svg");
if (svg && !svg.createSVGRect) svg = null;
dv.svg = svg;
if (svg) gapElts.push(svg);
}
return dv.gap = elt("div", gapElts, "CodeMirror-merge-gap");
}
MergeView.prototype = {
constructor: MergeView,
editor: function() { return this.edit; },
rightOriginal: function() { return this.right && this.right.orig; },
leftOriginal: function() { return this.left && this.left.orig; },
setShowDifferences: function(val) {
if (this.right) this.right.setShowDifferences(val);
if (this.left) this.left.setShowDifferences(val);
},
rightChunks: function() {
if (this.right) { ensureDiff(this.right); return this.right.chunks; }
},
leftChunks: function() {
if (this.left) { ensureDiff(this.left); return this.left.chunks; }
}
};
function asString(obj) {
if (typeof obj == "string") return obj;
else return obj.getValue();
}
// Operations on diffs
var dmp;
function getDiff(a, b, ignoreWhitespace) {
if (!dmp) dmp = new diff_match_patch();
var diff = dmp.diff_main(a, b);
// The library sometimes leaves in empty parts, which confuse the algorithm
for (var i = 0; i < diff.length; ++i) {
var part = diff[i];
if (ignoreWhitespace ? !/[^ \t]/.test(part[1]) : !part[1]) {
diff.splice(i--, 1);
} else if (i && diff[i - 1][0] == part[0]) {
diff.splice(i--, 1);
diff[i][1] += part[1];
}
}
return diff;
}
function getChunks(diff) {
var chunks = [];
if (!diff.length) return chunks;
var startEdit = 0, startOrig = 0;
var edit = Pos(0, 0), orig = Pos(0, 0);
for (var i = 0; i < diff.length; ++i) {
var part = diff[i], tp = part[0];
if (tp == DIFF_EQUAL) {
var startOff = !startOfLineClean(diff, i) || edit.line < startEdit || orig.line < startOrig ? 1 : 0;
var cleanFromEdit = edit.line + startOff, cleanFromOrig = orig.line + startOff;
moveOver(edit, part[1], null, orig);
var endOff = endOfLineClean(diff, i) ? 1 : 0;
var cleanToEdit = edit.line + endOff, cleanToOrig = orig.line + endOff;
if (cleanToEdit > cleanFromEdit) {
if (i) chunks.push({origFrom: startOrig, origTo: cleanFromOrig,
editFrom: startEdit, editTo: cleanFromEdit});
startEdit = cleanToEdit; startOrig = cleanToOrig;
}
} else {
moveOver(tp == DIFF_INSERT ? edit : orig, part[1]);
}
}
if (startEdit <= edit.line || startOrig <= orig.line)
chunks.push({origFrom: startOrig, origTo: orig.line + 1,
editFrom: startEdit, editTo: edit.line + 1});
return chunks;
}
function endOfLineClean(diff, i) {
if (i == diff.length - 1) return true;
var next = diff[i + 1][1];
if ((next.length == 1 && i < diff.length - 2) || next.charCodeAt(0) != 10) return false;
if (i == diff.length - 2) return true;
next = diff[i + 2][1];
return (next.length > 1 || i == diff.length - 3) && next.charCodeAt(0) == 10;
}
function startOfLineClean(diff, i) {
if (i == 0) return true;
var last = diff[i - 1][1];
if (last.charCodeAt(last.length - 1) != 10) return false;
if (i == 1) return true;
last = diff[i - 2][1];
return last.charCodeAt(last.length - 1) == 10;
}
function chunkBoundariesAround(chunks, n, nInEdit) {
var beforeE, afterE, beforeO, afterO;
for (var i = 0; i < chunks.length; i++) {
var chunk = chunks[i];
var fromLocal = nInEdit ? chunk.editFrom : chunk.origFrom;
var toLocal = nInEdit ? chunk.editTo : chunk.origTo;
if (afterE == null) {
if (fromLocal > n) { afterE = chunk.editFrom; afterO = chunk.origFrom; }
else if (toLocal > n) { afterE = chunk.editTo; afterO = chunk.origTo; }
}
if (toLocal <= n) { beforeE = chunk.editTo; beforeO = chunk.origTo; }
else if (fromLocal <= n) { beforeE = chunk.editFrom; beforeO = chunk.origFrom; }
}
return {edit: {before: beforeE, after: afterE}, orig: {before: beforeO, after: afterO}};
}
function collapseSingle(cm, from, to) {
cm.addLineClass(from, "wrap", "CodeMirror-merge-collapsed-line");
var widget = document.createElement("span");
widget.className = "CodeMirror-merge-collapsed-widget";
widget.title = cm.phrase("Identical text collapsed. Click to expand.");
var mark = cm.markText(Pos(from, 0), Pos(to - 1), {
inclusiveLeft: true,
inclusiveRight: true,
replacedWith: widget,
clearOnEnter: true
});
function clear() {
mark.clear();
cm.removeLineClass(from, "wrap", "CodeMirror-merge-collapsed-line");
}
if (mark.explicitlyCleared) clear();
CodeMirror.on(widget, "click", clear);
mark.on("clear", clear);
CodeMirror.on(widget, "click", clear);
return {mark: mark, clear: clear};
}
function collapseStretch(size, editors) {
var marks = [];
function clear() {
for (var i = 0; i < marks.length; i++) marks[i].clear();
}
for (var i = 0; i < editors.length; i++) {
var editor = editors[i];
var mark = collapseSingle(editor.cm, editor.line, editor.line + size);
marks.push(mark);
mark.mark.on("clear", clear);
}
return marks[0].mark;
}
function unclearNearChunks(dv, margin, off, clear) {
for (var i = 0; i < dv.chunks.length; i++) {
var chunk = dv.chunks[i];
for (var l = chunk.editFrom - margin; l < chunk.editTo + margin; l++) {
var pos = l + off;
if (pos >= 0 && pos < clear.length) clear[pos] = false;
}
}
}
function collapseIdenticalStretches(mv, margin) {
if (typeof margin != "number") margin = 2;
var clear = [], edit = mv.editor(), off = edit.firstLine();
for (var l = off, e = edit.lastLine(); l <= e; l++) clear.push(true);
if (mv.left) unclearNearChunks(mv.left, margin, off, clear);
if (mv.right) unclearNearChunks(mv.right, margin, off, clear);
for (var i = 0; i < clear.length; i++) {
if (clear[i]) {
var line = i + off;
for (var size = 1; i < clear.length - 1 && clear[i + 1]; i++, size++) {}
if (size > margin) {
var editors = [{line: line, cm: edit}];
if (mv.left) editors.push({line: getMatchingOrigLine(line, mv.left.chunks), cm: mv.left.orig});
if (mv.right) editors.push({line: getMatchingOrigLine(line, mv.right.chunks), cm: mv.right.orig});
var mark = collapseStretch(size, editors);
if (mv.options.onCollapse) mv.options.onCollapse(mv, line, size, mark);
}
}
}
}
// General 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") e.appendChild(document.createTextNode(content));
else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
return e;
}
function clear(node) {
for (var count = node.childNodes.length; count > 0; --count)
node.removeChild(node.firstChild);
}
function attrs(elt) {
for (var i = 1; i < arguments.length; i += 2)
elt.setAttribute(arguments[i], arguments[i+1]);
}
function copyObj(obj, target) {
if (!target) target = {};
for (var prop in obj) if (obj.hasOwnProperty(prop)) target[prop] = obj[prop];
return target;
}
function moveOver(pos, str, copy, other) {
var out = copy ? Pos(pos.line, pos.ch) : pos, at = 0;
for (;;) {
var nl = str.indexOf("\n", at);
if (nl == -1) break;
++out.line;
if (other) ++other.line;
at = nl + 1;
}
out.ch = (at ? 0 : out.ch) + (str.length - at);
if (other) other.ch = (at ? 0 : other.ch) + (str.length - at);
return out;
}
// Tracks collapsed markers and line widgets, in order to be able to
// accurately align the content of two editors.
var F_WIDGET = 1, F_WIDGET_BELOW = 2, F_MARKER = 4
function TrackAlignable(cm) {
this.cm = cm
this.alignable = []
this.height = cm.doc.height
var self = this
cm.on("markerAdded", function(_, marker) {
if (!marker.collapsed) return
var found = marker.find(1)
if (found != null) self.set(found.line, F_MARKER)
})
cm.on("markerCleared", function(_, marker, _min, max) {
if (max != null && marker.collapsed)
self.check(max, F_MARKER, self.hasMarker)
})
cm.on("markerChanged", this.signal.bind(this))
cm.on("lineWidgetAdded", function(_, widget, lineNo) {
if (widget.mergeSpacer) return
if (widget.above) self.set(lineNo - 1, F_WIDGET_BELOW)
else self.set(lineNo, F_WIDGET)
})
cm.on("lineWidgetCleared", function(_, widget, lineNo) {
if (widget.mergeSpacer) return
if (widget.above) self.check(lineNo - 1, F_WIDGET_BELOW, self.hasWidgetBelow)
else self.check(lineNo, F_WIDGET, self.hasWidget)
})
cm.on("lineWidgetChanged", this.signal.bind(this))
cm.on("change", function(_, change) {
var start = change.from.line, nBefore = change.to.line - change.from.line
var nAfter = change.text.length - 1, end = start + nAfter
if (nBefore || nAfter) self.map(start, nBefore, nAfter)
self.check(end, F_MARKER, self.hasMarker)
if (nBefore || nAfter) self.check(change.from.line, F_MARKER, self.hasMarker)
})
cm.on("viewportChange", function() {
if (self.cm.doc.height != self.height) self.signal()
})
}
TrackAlignable.prototype = {
signal: function() {
CodeMirror.signal(this, "realign")
this.height = this.cm.doc.height
},
set: function(n, flags) {
var pos = -1
for (; pos < this.alignable.length; pos += 2) {
var diff = this.alignable[pos] - n
if (diff == 0) {
if ((this.alignable[pos + 1] & flags) == flags) return
this.alignable[pos + 1] |= flags
this.signal()
return
}
if (diff > 0) break
}
this.signal()
this.alignable.splice(pos, 0, n, flags)
},
find: function(n) {
for (var i = 0; i < this.alignable.length; i += 2)
if (this.alignable[i] == n) return i
return -1
},
check: function(n, flag, pred) {
var found = this.find(n)
if (found == -1 || !(this.alignable[found + 1] & flag)) return
if (!pred.call(this, n)) {
this.signal()
var flags = this.alignable[found + 1] & ~flag
if (flags) this.alignable[found + 1] = flags
else this.alignable.splice(found, 2)
}
},
hasMarker: function(n) {
var handle = this.cm.getLineHandle(n)
if (handle.markedSpans) for (var i = 0; i < handle.markedSpans.length; i++)
if (handle.markedSpans[i].marker.collapsed && handle.markedSpans[i].to != null)
return true
return false
},
hasWidget: function(n) {
var handle = this.cm.getLineHandle(n)
if (handle.widgets) for (var i = 0; i < handle.widgets.length; i++)
if (!handle.widgets[i].above && !handle.widgets[i].mergeSpacer) return true
return false
},
hasWidgetBelow: function(n) {
if (n == this.cm.lastLine()) return false
var handle = this.cm.getLineHandle(n + 1)
if (handle.widgets) for (var i = 0; i < handle.widgets.length; i++)
if (handle.widgets[i].above && !handle.widgets[i].mergeSpacer) return true
return false
},
map: function(from, nBefore, nAfter) {
var diff = nAfter - nBefore, to = from + nBefore, widgetFrom = -1, widgetTo = -1
for (var i = 0; i < this.alignable.length; i += 2) {
var n = this.alignable[i]
if (n == from && (this.alignable[i + 1] & F_WIDGET_BELOW)) widgetFrom = i
if (n == to && (this.alignable[i + 1] & F_WIDGET_BELOW)) widgetTo = i
if (n <= from) continue
else if (n < to) this.alignable.splice(i--, 2)
else this.alignable[i] += diff
}
if (widgetFrom > -1) {
var flags = this.alignable[widgetFrom + 1]
if (flags == F_WIDGET_BELOW) this.alignable.splice(widgetFrom, 2)
else this.alignable[widgetFrom + 1] = flags & ~F_WIDGET_BELOW
}
if (widgetTo > -1 && nAfter)
this.set(from + nAfter, F_WIDGET_BELOW)
}
}
function posMin(a, b) { return (a.line - b.line || a.ch - b.ch) < 0 ? a : b; }
function posMax(a, b) { return (a.line - b.line || a.ch - b.ch) > 0 ? a : b; }
function posEq(a, b) { return a.line == b.line && a.ch == b.ch; }
function findPrevDiff(chunks, start, isOrig) {
for (var i = chunks.length - 1; i >= 0; i--) {
var chunk = chunks[i];
var to = (isOrig ? chunk.origTo : chunk.editTo) - 1;
if (to < start) return to;
}
}
function findNextDiff(chunks, start, isOrig) {
for (var i = 0; i < chunks.length; i++) {
var chunk = chunks[i];
var from = (isOrig ? chunk.origFrom : chunk.editFrom);
if (from > start) return from;
}
}
function goNearbyDiff(cm, dir) {
var found = null, views = cm.state.diffViews, line = cm.getCursor().line;
if (views) for (var i = 0; i < views.length; i++) {
var dv = views[i], isOrig = cm == dv.orig;
ensureDiff(dv);
var pos = dir < 0 ? findPrevDiff(dv.chunks, line, isOrig) : findNextDiff(dv.chunks, line, isOrig);
if (pos != null && (found == null || (dir < 0 ? pos > found : pos < found)))
found = pos;
}
if (found != null)
cm.setCursor(found, 0);
else
return CodeMirror.Pass;
}
CodeMirror.commands.goNextDiff = function(cm) {
return goNearbyDiff(cm, 1);
};
CodeMirror.commands.goPrevDiff = function(cm) {
return goNearbyDiff(cm, -1);
};
});