--- /dev/null
+(function() {
+ "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.orig = CodeMirror(pane, copyObj({value: orig, readOnly: true}, copyObj(options)));
+
+ this.diff = getDiff(orig, options.value);
+ this.diffOutOfDate = false;
+
+ this.forceUpdate = registerUpdate(this);
+ setScrollLock(this, true, false);
+ registerScroll(this);
+ }
+ };
+
+ function registerUpdate(dv) {
+ var edit = {from: 0, to: 0, marked: []};
+ var orig = {from: 0, to: 0, marked: []};
+ var debounceChange;
+ function update() {
+ if (dv.diffOutOfDate) {
+ dv.diff = getDiff(dv.orig.getValue(), dv.edit.getValue());
+ dv.diffOutOfDate = false;
+ }
+ updateMarks(dv.edit, dv.diff, edit, DIFF_INSERT, dv.classes);
+ updateMarks(dv.orig, dv.diff, orig, DIFF_DELETE, dv.classes);
+ drawConnectors(dv);
+ }
+ function set(slow) {
+ clearTimeout(debounceChange);
+ debounceChange = setTimeout(update, slow == true ? 250 : 100);
+ }
+ dv.edit.on("change", function() {
+ if (!dv.diffOutOfDate) {
+ dv.diffOutOfDate = true;
+ edit.from = edit.to = orig.from = orig.to = 0;
+ }
+ set(true);
+ });
+ dv.edit.on("viewportChange", set);
+ dv.orig.on("viewportChange", set);
+ update();
+ return update;
+ }
+
+ function registerScroll(dv) {
+ dv.edit.on("scroll", function() {
+ syncScroll(dv, DIFF_INSERT) && drawConnectors(dv);
+ });
+ dv.orig.on("scroll", function() {
+ syncScroll(dv, DIFF_DELETE) && drawConnectors(dv);
+ });
+ }
+
+ function syncScroll(dv, type) {
+ // Change handler will do a refresh after a timeout when diff is out of date
+ if (dv.diffOutOfDate) return false;
+ if (!dv.lockScroll) return true;
+ var editor, other, now = +new Date;
+ if (type == DIFF_INSERT) { 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) + 50 > now) return false;
+
+ var sInfo = editor.getScrollInfo(), halfScreen = .5 * sInfo.clientHeight, midY = sInfo.top + halfScreen;
+ var mid = editor.lineAtHeight(midY, "local");
+ var around = chunkBoundariesAround(dv.diff, mid, type == DIFF_INSERT);
+ var off = getOffsets(editor, type == DIFF_INSERT ? around.edit : around.orig);
+ var offOther = getOffsets(other, type == DIFF_INSERT ? 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) && drawConnectors(dv);
+ dv.lockButton.innerHTML = val ? "\u21db\u21da" : "\u21db \u21da";
+ }
+
+ // Updating the marks for editor content
+
+ 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 {
+ editor.removeLineClass(mark, "background", classes.chunk);
+ editor.removeLineClass(mark, "background", classes.start);
+ editor.removeLineClass(mark, "background", classes.end);
+ }
+ }
+ 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 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) {
+ var line = editor.addLineClass(i, "background", classes.chunk);
+ if (i == start) editor.addLineClass(line, "background", classes.start);
+ if (i == end - 1) editor.addLineClass(line, "background", classes.end);
+ marks.push(line);
+ }
+ // When the chunk is empty, make sure a horizontal line shows up
+ if (start == end && bfrom == end && bto == end) {
+ if (bfrom)
+ marks.push(editor.addLineClass(bfrom - 1, "background", classes.end));
+ else
+ marks.push(editor.addLineClass(bfrom, "background", classes.start));
+ }
+ }
+
+ var chunkStart = 0;
+ 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 (i) markChunk(chunkStart, cleanFrom);
+ chunkStart = cleanTo;
+ }
+ } else {
+ 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 (chunkStart <= pos.line) markChunk(chunkStart, pos.line + 1);
+ }
+
+ // Updating the gap between editor and original
+
+ function drawConnectors(dv) {
+ if (dv.svg) {
+ clear(dv.svg);
+ var w = dv.gap.offsetWidth;
+ attrs(dv.svg, "width", w, "height", dv.gap.offsetHeight);
+ }
+ clear(dv.copyButtons);
+
+ var flip = dv.type == "left";
+ var vpEdit = dv.edit.getViewport(), vpOrig = dv.orig.getViewport();
+ var sTopEdit = dv.edit.getScrollInfo().top, sTopOrig = dv.orig.getScrollInfo().top;
+ iterateChunks(dv.diff, function(topOrig, botOrig, topEdit, botEdit) {
+ if (topEdit > vpEdit.to || botEdit < vpEdit.from ||
+ topOrig > vpOrig.to || botOrig < vpOrig.from)
+ return;
+ var topLpx = dv.orig.heightAtLine(topOrig, "local") - sTopOrig, top = topLpx;
+ if (dv.svg) {
+ var topRpx = dv.edit.heightAtLine(topEdit, "local") - sTopEdit;
+ if (flip) { var tmp = topLpx; topLpx = topRpx; topRpx = tmp; }
+ var botLpx = dv.orig.heightAtLine(botOrig, "local") - sTopOrig;
+ var botRpx = dv.edit.heightAtLine(botEdit, "local") - 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);
+ }
+ var copy = dv.copyButtons.appendChild(elt("div", dv.type == "left" ? "\u21dd" : "\u21dc",
+ "CodeMirror-merge-copy"));
+ copy.title = "Revert chunk";
+ copy.chunk = {topEdit: topEdit, botEdit: botEdit, topOrig: topOrig, botOrig: botOrig};
+ copy.style.top = top + "px";
+ });
+ }
+
+ function copyChunk(dv, chunk) {
+ if (dv.diffOutOfDate) return;
+ dv.edit.replaceRange(dv.orig.getRange(Pos(chunk.topOrig, 0), Pos(chunk.botOrig, 0)),
+ Pos(chunk.topEdit, 0), Pos(chunk.botEdit, 0));
+ }
+
+ // 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);
+
+ 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;
+
+ if (hasLeft) {
+ left = this.left = new DiffView(this, "left");
+ var leftPane = elt("div", null, "CodeMirror-merge-pane");
+ wrap.push(leftPane);
+ wrap.push(buildGap(left));
+ }
+
+ var editPane = elt("div", null, "CodeMirror-merge-pane");
+ wrap.push(editPane);
+
+ if (hasRight) {
+ right = this.right = new DiffView(this, "right");
+ wrap.push(buildGap(right));
+ var rightPane = elt("div", null, "CodeMirror-merge-pane");
+ 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);
+
+ var onResize = function() {
+ if (left) drawConnectors(left);
+ if (right) drawConnectors(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.title = "Toggle locked scrolling";
+ var lockWrap = elt("div", [lock], "CodeMirror-merge-scrolllock-wrap");
+ CodeMirror.on(lock, "click", function() { setScrollLock(dv, !dv.lockScroll); });
+ 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) copyChunk(dv, node.chunk);
+ });
+ var gapElts = [dv.copyButtons, lockWrap];
+ 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 = {
+ constuctor: MergeView,
+ editor: function() { return this.edit; },
+ rightOriginal: function() { return this.right && this.right.orig; },
+ leftOriginal: function() { return this.left && this.left.orig; }
+ };
+
+ // Operations on diffs
+
+ var dmp = new diff_match_patch();
+ function getDiff(a, b) {
+ var diff = dmp.diff_main(a, b);
+ dmp.diff_cleanupSemantic(diff);
+ // The library sometimes leaves in empty parts, which confuse the algorithm
+ for (var i = 0; i < diff.length; ++i) {
+ var part = diff[i];
+ if (!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 iterateChunks(diff, f) {
+ 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) ? 0 : 1;
+ 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) f(startOrig, cleanFromOrig, startEdit, cleanFromEdit);
+ startEdit = cleanToEdit; startOrig = cleanToOrig;
+ }
+ } else {
+ moveOver(tp == DIFF_INSERT ? edit : orig, part[1]);
+ }
+ }
+ if (startEdit <= edit.line || startOrig <= orig.line)
+ f(startOrig, orig.line + 1, startEdit, edit.line + 1);
+ }
+
+ function endOfLineClean(diff, i) {
+ if (i == diff.length - 1) return true;
+ var next = diff[i + 1][1];
+ if (next.length == 1 || next.charCodeAt(0) != 10) return false;
+ if (i == diff.length - 2) return true;
+ next = diff[i + 2][1];
+ return next.length > 1 && 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(diff, n, nInEdit) {
+ var beforeE, afterE, beforeO, afterO;
+ iterateChunks(diff, function(fromOrig, toOrig, fromEdit, toEdit) {
+ var fromLocal = nInEdit ? fromEdit : fromOrig;
+ var toLocal = nInEdit ? toEdit : toOrig;
+ if (afterE == null) {
+ if (fromLocal > n) { afterE = fromEdit; afterO = fromOrig; }
+ else if (toLocal > n) { afterE = toEdit; afterO = toOrig; }
+ }
+ if (toLocal <= n) { beforeE = toEdit; beforeO = toOrig; }
+ else if (fromLocal <= n) { beforeE = fromEdit; beforeO = fromOrig; }
+ });
+ return {edit: {before: beforeE, after: afterE}, orig: {before: beforeO, after: afterO}};
+ }
+
+ // 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;
+ }
+
+ 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; }
+})();
git://git.onelab.eu / myslice.git / blobdiff