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772 lines
28 KiB
JavaScript
772 lines
28 KiB
JavaScript
// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: http://codemirror.net/LICENSE
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// declare global: diff_match_patch, DIFF_INSERT, DIFF_DELETE, DIFF_EQUAL
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(function(mod) {
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if (typeof exports == "object" && typeof module == "object") // CommonJS
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mod(require("../../lib/codemirror")); // Note non-packaged dependency diff_match_patch
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else if (typeof define == "function" && define.amd) // AMD
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define(["../../lib/codemirror", "diff_match_patch"], mod);
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else // Plain browser env
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mod(CodeMirror);
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})(function(CodeMirror) {
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"use strict";
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var Pos = CodeMirror.Pos;
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var svgNS = "http://www.w3.org/2000/svg";
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function DiffView(mv, type) {
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this.mv = mv;
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this.type = type;
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this.classes = type == "left"
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? {chunk: "CodeMirror-merge-l-chunk",
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start: "CodeMirror-merge-l-chunk-start",
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end: "CodeMirror-merge-l-chunk-end",
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insert: "CodeMirror-merge-l-inserted",
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del: "CodeMirror-merge-l-deleted",
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connect: "CodeMirror-merge-l-connect"}
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: {chunk: "CodeMirror-merge-r-chunk",
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start: "CodeMirror-merge-r-chunk-start",
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end: "CodeMirror-merge-r-chunk-end",
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insert: "CodeMirror-merge-r-inserted",
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del: "CodeMirror-merge-r-deleted",
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connect: "CodeMirror-merge-r-connect"};
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}
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DiffView.prototype = {
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constructor: DiffView,
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init: function(pane, orig, options) {
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this.edit = this.mv.edit;
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(this.edit.state.diffViews || (this.edit.state.diffViews = [])).push(this);
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this.orig = CodeMirror(pane, copyObj({value: orig, readOnly: !this.mv.options.allowEditingOriginals}, copyObj(options)));
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this.orig.state.diffViews = [this];
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this.diff = getDiff(asString(orig), asString(options.value));
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this.chunks = getChunks(this.diff);
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this.diffOutOfDate = this.dealigned = false;
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this.showDifferences = options.showDifferences !== false;
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this.forceUpdate = registerUpdate(this);
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setScrollLock(this, true, false);
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registerScroll(this);
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},
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setShowDifferences: function(val) {
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val = val !== false;
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if (val != this.showDifferences) {
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this.showDifferences = val;
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this.forceUpdate("full");
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}
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}
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};
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function ensureDiff(dv) {
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if (dv.diffOutOfDate) {
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dv.diff = getDiff(dv.orig.getValue(), dv.edit.getValue());
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dv.chunks = getChunks(dv.diff);
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dv.diffOutOfDate = false;
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CodeMirror.signal(dv.edit, "updateDiff", dv.diff);
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}
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}
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var updating = false;
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function registerUpdate(dv) {
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var edit = {from: 0, to: 0, marked: []};
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var orig = {from: 0, to: 0, marked: []};
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var debounceChange, updatingFast = false;
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function update(mode) {
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updating = true;
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updatingFast = false;
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if (mode == "full") {
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if (dv.svg) clear(dv.svg);
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if (dv.copyButtons) clear(dv.copyButtons);
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clearMarks(dv.edit, edit.marked, dv.classes);
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clearMarks(dv.orig, orig.marked, dv.classes);
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edit.from = edit.to = orig.from = orig.to = 0;
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}
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ensureDiff(dv);
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if (dv.showDifferences) {
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updateMarks(dv.edit, dv.diff, edit, DIFF_INSERT, dv.classes);
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updateMarks(dv.orig, dv.diff, orig, DIFF_DELETE, dv.classes);
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}
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makeConnections(dv);
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if (dv.mv.options.connect == "align")
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alignChunks(dv);
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updating = false;
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}
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function setDealign(fast) {
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if (updating) return;
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dv.dealigned = true;
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set(fast);
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}
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function set(fast) {
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if (updating || updatingFast) return;
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clearTimeout(debounceChange);
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if (fast === true) updatingFast = true;
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debounceChange = setTimeout(update, fast === true ? 20 : 250);
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}
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function change(_cm, change) {
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if (!dv.diffOutOfDate) {
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dv.diffOutOfDate = true;
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edit.from = edit.to = orig.from = orig.to = 0;
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}
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// Update faster when a line was added/removed
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setDealign(change.text.length - 1 != change.to.line - change.from.line);
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}
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dv.edit.on("change", change);
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dv.orig.on("change", change);
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dv.edit.on("markerAdded", setDealign);
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dv.edit.on("markerCleared", setDealign);
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dv.orig.on("markerAdded", setDealign);
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dv.orig.on("markerCleared", setDealign);
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dv.edit.on("viewportChange", function() { set(false); });
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dv.orig.on("viewportChange", function() { set(false); });
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update();
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return update;
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}
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function registerScroll(dv) {
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dv.edit.on("scroll", function() {
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syncScroll(dv, DIFF_INSERT) && makeConnections(dv);
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});
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dv.orig.on("scroll", function() {
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syncScroll(dv, DIFF_DELETE) && makeConnections(dv);
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});
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}
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function syncScroll(dv, type) {
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// Change handler will do a refresh after a timeout when diff is out of date
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if (dv.diffOutOfDate) return false;
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if (!dv.lockScroll) return true;
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var editor, other, now = +new Date;
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if (type == DIFF_INSERT) { editor = dv.edit; other = dv.orig; }
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else { editor = dv.orig; other = dv.edit; }
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// Don't take action if the position of this editor was recently set
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// (to prevent feedback loops)
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if (editor.state.scrollSetBy == dv && (editor.state.scrollSetAt || 0) + 50 > now) return false;
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var sInfo = editor.getScrollInfo();
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if (dv.mv.options.connect == "align") {
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targetPos = sInfo.top;
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} else {
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var halfScreen = .5 * sInfo.clientHeight, midY = sInfo.top + halfScreen;
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var mid = editor.lineAtHeight(midY, "local");
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var around = chunkBoundariesAround(dv.chunks, mid, type == DIFF_INSERT);
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var off = getOffsets(editor, type == DIFF_INSERT ? around.edit : around.orig);
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var offOther = getOffsets(other, type == DIFF_INSERT ? around.orig : around.edit);
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var ratio = (midY - off.top) / (off.bot - off.top);
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var targetPos = (offOther.top - halfScreen) + ratio * (offOther.bot - offOther.top);
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var botDist, mix;
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// Some careful tweaking to make sure no space is left out of view
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// when scrolling to top or bottom.
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if (targetPos > sInfo.top && (mix = sInfo.top / halfScreen) < 1) {
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targetPos = targetPos * mix + sInfo.top * (1 - mix);
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} else if ((botDist = sInfo.height - sInfo.clientHeight - sInfo.top) < halfScreen) {
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var otherInfo = other.getScrollInfo();
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var botDistOther = otherInfo.height - otherInfo.clientHeight - targetPos;
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if (botDistOther > botDist && (mix = botDist / halfScreen) < 1)
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targetPos = targetPos * mix + (otherInfo.height - otherInfo.clientHeight - botDist) * (1 - mix);
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}
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}
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other.scrollTo(sInfo.left, targetPos);
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other.state.scrollSetAt = now;
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other.state.scrollSetBy = dv;
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return true;
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}
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function getOffsets(editor, around) {
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var bot = around.after;
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if (bot == null) bot = editor.lastLine() + 1;
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return {top: editor.heightAtLine(around.before || 0, "local"),
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bot: editor.heightAtLine(bot, "local")};
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}
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function setScrollLock(dv, val, action) {
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dv.lockScroll = val;
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if (val && action != false) syncScroll(dv, DIFF_INSERT) && makeConnections(dv);
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dv.lockButton.innerHTML = val ? "\u21db\u21da" : "\u21db \u21da";
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}
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// Updating the marks for editor content
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function clearMarks(editor, arr, classes) {
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for (var i = 0; i < arr.length; ++i) {
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var mark = arr[i];
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if (mark instanceof CodeMirror.TextMarker) {
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mark.clear();
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} else if (mark.parent) {
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editor.removeLineClass(mark, "background", classes.chunk);
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editor.removeLineClass(mark, "background", classes.start);
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editor.removeLineClass(mark, "background", classes.end);
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}
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}
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arr.length = 0;
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}
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// FIXME maybe add a margin around viewport to prevent too many updates
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function updateMarks(editor, diff, state, type, classes) {
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var vp = editor.getViewport();
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editor.operation(function() {
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if (state.from == state.to || vp.from - state.to > 20 || state.from - vp.to > 20) {
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clearMarks(editor, state.marked, classes);
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markChanges(editor, diff, type, state.marked, vp.from, vp.to, classes);
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state.from = vp.from; state.to = vp.to;
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} else {
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if (vp.from < state.from) {
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markChanges(editor, diff, type, state.marked, vp.from, state.from, classes);
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state.from = vp.from;
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}
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if (vp.to > state.to) {
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markChanges(editor, diff, type, state.marked, state.to, vp.to, classes);
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state.to = vp.to;
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}
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}
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});
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}
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function markChanges(editor, diff, type, marks, from, to, classes) {
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var pos = Pos(0, 0);
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var top = Pos(from, 0), bot = editor.clipPos(Pos(to - 1));
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var cls = type == DIFF_DELETE ? classes.del : classes.insert;
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function markChunk(start, end) {
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var bfrom = Math.max(from, start), bto = Math.min(to, end);
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for (var i = bfrom; i < bto; ++i) {
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var line = editor.addLineClass(i, "background", classes.chunk);
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if (i == start) editor.addLineClass(line, "background", classes.start);
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if (i == end - 1) editor.addLineClass(line, "background", classes.end);
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marks.push(line);
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}
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// When the chunk is empty, make sure a horizontal line shows up
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if (start == end && bfrom == end && bto == end) {
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if (bfrom)
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marks.push(editor.addLineClass(bfrom - 1, "background", classes.end));
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else
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marks.push(editor.addLineClass(bfrom, "background", classes.start));
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}
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}
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var chunkStart = 0;
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for (var i = 0; i < diff.length; ++i) {
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var part = diff[i], tp = part[0], str = part[1];
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if (tp == DIFF_EQUAL) {
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var cleanFrom = pos.line + (startOfLineClean(diff, i) ? 0 : 1);
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moveOver(pos, str);
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var cleanTo = pos.line + (endOfLineClean(diff, i) ? 1 : 0);
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if (cleanTo > cleanFrom) {
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if (i) markChunk(chunkStart, cleanFrom);
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chunkStart = cleanTo;
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}
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} else {
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if (tp == type) {
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var end = moveOver(pos, str, true);
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var a = posMax(top, pos), b = posMin(bot, end);
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if (!posEq(a, b))
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marks.push(editor.markText(a, b, {className: cls}));
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pos = end;
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}
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}
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}
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if (chunkStart <= pos.line) markChunk(chunkStart, pos.line + 1);
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}
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// Updating the gap between editor and original
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function makeConnections(dv) {
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if (!dv.showDifferences) return;
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if (dv.svg) {
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clear(dv.svg);
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var w = dv.gap.offsetWidth;
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attrs(dv.svg, "width", w, "height", dv.gap.offsetHeight);
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}
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if (dv.copyButtons) clear(dv.copyButtons);
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var vpEdit = dv.edit.getViewport(), vpOrig = dv.orig.getViewport();
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var sTopEdit = dv.edit.getScrollInfo().top, sTopOrig = dv.orig.getScrollInfo().top;
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for (var i = 0; i < dv.chunks.length; i++) {
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var ch = dv.chunks[i];
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if (ch.editFrom <= vpEdit.to && ch.editTo >= vpEdit.from &&
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ch.origFrom <= vpOrig.to && ch.origTo >= vpOrig.from)
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drawConnectorsForChunk(dv, ch, sTopOrig, sTopEdit, w);
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}
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}
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function getMatchingOrigLine(editLine, chunks) {
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var editStart = 0, origStart = 0;
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for (var i = 0; i < chunks.length; i++) {
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var chunk = chunks[i];
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if (chunk.editTo > editLine && chunk.editFrom <= editLine) return null;
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if (chunk.editFrom > editLine) break;
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editStart = chunk.editTo;
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origStart = chunk.origTo;
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}
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return origStart + (editLine - editStart);
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}
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function findAlignedLines(dv, other) {
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var linesToAlign = [];
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for (var i = 0; i < dv.chunks.length; i++) {
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var chunk = dv.chunks[i];
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linesToAlign.push([chunk.origTo, chunk.editTo, other ? getMatchingOrigLine(chunk.editTo, other.chunks) : null]);
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}
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if (other) {
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for (var i = 0; i < other.chunks.length; i++) {
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var chunk = other.chunks[i];
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for (var j = 0; j < linesToAlign.length; j++) {
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var align = linesToAlign[j];
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if (align[1] == chunk.editTo) {
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j = -1;
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break;
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} else if (align[1] > chunk.editTo) {
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break;
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}
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}
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if (j > -1)
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linesToAlign.splice(j - 1, 0, [getMatchingOrigLine(chunk.editTo, dv.chunks), chunk.editTo, chunk.origTo]);
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}
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}
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return linesToAlign;
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}
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function alignChunks(dv, force) {
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if (!dv.dealigned && !force) return;
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if (!dv.orig.curOp) return dv.orig.operation(function() {
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alignChunks(dv, force);
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});
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dv.dealigned = false;
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var other = dv.mv.left == dv ? dv.mv.right : dv.mv.left;
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if (other) {
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ensureDiff(other);
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other.dealigned = false;
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}
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var linesToAlign = findAlignedLines(dv, other);
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// Clear old aligners
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var aligners = dv.mv.aligners;
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for (var i = 0; i < aligners.length; i++)
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aligners[i].clear();
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aligners.length = 0;
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var cm = [dv.orig, dv.edit], scroll = [];
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if (other) cm.push(other.orig);
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for (var i = 0; i < cm.length; i++)
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scroll.push(cm[i].getScrollInfo().top);
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for (var ln = 0; ln < linesToAlign.length; ln++)
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alignLines(cm, linesToAlign[ln], aligners);
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for (var i = 0; i < cm.length; i++)
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cm[i].scrollTo(null, scroll[i]);
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}
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function alignLines(cm, lines, aligners) {
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var maxOffset = 0, offset = [];
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for (var i = 0; i < cm.length; i++) if (lines[i] != null) {
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var off = cm[i].heightAtLine(lines[i], "local");
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offset[i] = off;
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maxOffset = Math.max(maxOffset, off);
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}
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for (var i = 0; i < cm.length; i++) if (lines[i] != null) {
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var diff = maxOffset - offset[i];
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if (diff > 1)
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aligners.push(padAbove(cm[i], lines[i], diff));
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}
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}
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function padAbove(cm, line, size) {
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var above = true;
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if (line > cm.lastLine()) {
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line--;
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above = false;
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}
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var elt = document.createElement("div");
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elt.className = "CodeMirror-merge-spacer";
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elt.style.height = size + "px"; elt.style.minWidth = "1px";
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return cm.addLineWidget(line, elt, {height: size, above: above});
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}
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function drawConnectorsForChunk(dv, chunk, sTopOrig, sTopEdit, w) {
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var flip = dv.type == "left";
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var top = dv.orig.heightAtLine(chunk.origFrom, "local") - sTopOrig;
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if (dv.svg) {
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var topLpx = top;
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var topRpx = dv.edit.heightAtLine(chunk.editFrom, "local") - sTopEdit;
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if (flip) { var tmp = topLpx; topLpx = topRpx; topRpx = tmp; }
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var botLpx = dv.orig.heightAtLine(chunk.origTo, "local") - sTopOrig;
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var botRpx = dv.edit.heightAtLine(chunk.editTo, "local") - sTopEdit;
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if (flip) { var tmp = botLpx; botLpx = botRpx; botRpx = tmp; }
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var curveTop = " C " + w/2 + " " + topRpx + " " + w/2 + " " + topLpx + " " + (w + 2) + " " + topLpx;
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var curveBot = " C " + w/2 + " " + botLpx + " " + w/2 + " " + botRpx + " -1 " + botRpx;
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attrs(dv.svg.appendChild(document.createElementNS(svgNS, "path")),
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"d", "M -1 " + topRpx + curveTop + " L " + (w + 2) + " " + botLpx + curveBot + " z",
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"class", dv.classes.connect);
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}
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if (dv.copyButtons) {
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var copy = dv.copyButtons.appendChild(elt("div", dv.type == "left" ? "\u21dd" : "\u21dc",
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"CodeMirror-merge-copy"));
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var editOriginals = dv.mv.options.allowEditingOriginals;
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copy.title = editOriginals ? "Push to left" : "Revert chunk";
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copy.chunk = chunk;
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copy.style.top = top + "px";
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if (editOriginals) {
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var topReverse = dv.orig.heightAtLine(chunk.editFrom, "local") - sTopEdit;
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var copyReverse = dv.copyButtons.appendChild(elt("div", dv.type == "right" ? "\u21dd" : "\u21dc",
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"CodeMirror-merge-copy-reverse"));
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copyReverse.title = "Push to right";
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copyReverse.chunk = {editFrom: chunk.origFrom, editTo: chunk.origTo,
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origFrom: chunk.editFrom, origTo: chunk.editTo};
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copyReverse.style.top = topReverse + "px";
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dv.type == "right" ? copyReverse.style.left = "2px" : copyReverse.style.right = "2px";
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}
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}
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}
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function copyChunk(dv, to, from, chunk) {
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if (dv.diffOutOfDate) return;
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to.replaceRange(from.getRange(Pos(chunk.origFrom, 0), Pos(chunk.origTo, 0)),
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Pos(chunk.editFrom, 0), Pos(chunk.editTo, 0));
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}
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// Merge view, containing 0, 1, or 2 diff views.
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var MergeView = CodeMirror.MergeView = function(node, options) {
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if (!(this instanceof MergeView)) return new MergeView(node, options);
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this.options = options;
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var origLeft = options.origLeft, origRight = options.origRight == null ? options.orig : options.origRight;
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var hasLeft = origLeft != null, hasRight = origRight != null;
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var panes = 1 + (hasLeft ? 1 : 0) + (hasRight ? 1 : 0);
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var wrap = [], left = this.left = null, right = this.right = null;
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var self = this;
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if (hasLeft) {
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left = this.left = new DiffView(this, "left");
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var leftPane = elt("div", null, "CodeMirror-merge-pane");
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wrap.push(leftPane);
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wrap.push(buildGap(left));
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}
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var editPane = elt("div", null, "CodeMirror-merge-pane");
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wrap.push(editPane);
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if (hasRight) {
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right = this.right = new DiffView(this, "right");
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wrap.push(buildGap(right));
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var rightPane = elt("div", null, "CodeMirror-merge-pane");
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wrap.push(rightPane);
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}
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(hasRight ? rightPane : editPane).className += " CodeMirror-merge-pane-rightmost";
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wrap.push(elt("div", null, null, "height: 0; clear: both;"));
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var wrapElt = this.wrap = node.appendChild(elt("div", wrap, "CodeMirror-merge CodeMirror-merge-" + panes + "pane"));
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this.edit = CodeMirror(editPane, copyObj(options));
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if (left) left.init(leftPane, origLeft, options);
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if (right) right.init(rightPane, origRight, options);
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if (options.collapseIdentical)
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this.editor().operation(function() {
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collapseIdenticalStretches(self, options.collapseIdentical);
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});
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if (options.connect == "align") {
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this.aligners = [];
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alignChunks(this.left || this.right, true);
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}
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var onResize = function() {
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if (left) makeConnections(left);
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if (right) makeConnections(right);
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};
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CodeMirror.on(window, "resize", onResize);
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var resizeInterval = setInterval(function() {
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for (var p = wrapElt.parentNode; p && p != document.body; p = p.parentNode) {}
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if (!p) { clearInterval(resizeInterval); CodeMirror.off(window, "resize", onResize); }
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}, 5000);
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};
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function buildGap(dv) {
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var lock = dv.lockButton = elt("div", null, "CodeMirror-merge-scrolllock");
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lock.title = "Toggle locked scrolling";
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var lockWrap = elt("div", [lock], "CodeMirror-merge-scrolllock-wrap");
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CodeMirror.on(lock, "click", function() { setScrollLock(dv, !dv.lockScroll); });
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var gapElts = [lockWrap];
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if (dv.mv.options.revertButtons !== false) {
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dv.copyButtons = elt("div", null, "CodeMirror-merge-copybuttons-" + dv.type);
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CodeMirror.on(dv.copyButtons, "click", function(e) {
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var node = e.target || e.srcElement;
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if (!node.chunk) return;
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if (node.className == "CodeMirror-merge-copy-reverse") {
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copyChunk(dv, dv.orig, dv.edit, node.chunk);
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return;
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}
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copyChunk(dv, dv.edit, dv.orig, node.chunk);
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});
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gapElts.unshift(dv.copyButtons);
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}
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if (dv.mv.options.connect != "align") {
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var svg = document.createElementNS && document.createElementNS(svgNS, "svg");
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if (svg && !svg.createSVGRect) svg = null;
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dv.svg = svg;
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if (svg) gapElts.push(svg);
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}
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return dv.gap = elt("div", gapElts, "CodeMirror-merge-gap");
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}
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MergeView.prototype = {
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constuctor: MergeView,
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editor: function() { return this.edit; },
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rightOriginal: function() { return this.right && this.right.orig; },
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leftOriginal: function() { return this.left && this.left.orig; },
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setShowDifferences: function(val) {
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if (this.right) this.right.setShowDifferences(val);
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if (this.left) this.left.setShowDifferences(val);
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},
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rightChunks: function() {
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if (this.right) { ensureDiff(this.right); return this.right.chunks; }
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},
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leftChunks: function() {
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if (this.left) { ensureDiff(this.left); return this.left.chunks; }
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}
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};
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function asString(obj) {
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if (typeof obj == "string") return obj;
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else return obj.getValue();
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}
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// Operations on diffs
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var dmp = new diff_match_patch();
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function getDiff(a, b) {
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var diff = dmp.diff_main(a, b);
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dmp.diff_cleanupSemantic(diff);
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// The library sometimes leaves in empty parts, which confuse the algorithm
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for (var i = 0; i < diff.length; ++i) {
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var part = diff[i];
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if (!part[1]) {
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diff.splice(i--, 1);
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} else if (i && diff[i - 1][0] == part[0]) {
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diff.splice(i--, 1);
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diff[i][1] += part[1];
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}
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}
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return diff;
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}
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function getChunks(diff) {
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var chunks = [];
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var startEdit = 0, startOrig = 0;
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var edit = Pos(0, 0), orig = Pos(0, 0);
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for (var i = 0; i < diff.length; ++i) {
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var part = diff[i], tp = part[0];
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if (tp == DIFF_EQUAL) {
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var startOff = startOfLineClean(diff, i) ? 0 : 1;
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var cleanFromEdit = edit.line + startOff, cleanFromOrig = orig.line + startOff;
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moveOver(edit, part[1], null, orig);
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var endOff = endOfLineClean(diff, i) ? 1 : 0;
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var cleanToEdit = edit.line + endOff, cleanToOrig = orig.line + endOff;
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if (cleanToEdit > cleanFromEdit) {
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if (i) chunks.push({origFrom: startOrig, origTo: cleanFromOrig,
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editFrom: startEdit, editTo: cleanFromEdit});
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startEdit = cleanToEdit; startOrig = cleanToOrig;
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}
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} else {
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moveOver(tp == DIFF_INSERT ? edit : orig, part[1]);
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}
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}
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if (startEdit <= edit.line || startOrig <= orig.line)
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chunks.push({origFrom: startOrig, origTo: orig.line + 1,
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editFrom: startEdit, editTo: edit.line + 1});
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return chunks;
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}
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function endOfLineClean(diff, i) {
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if (i == diff.length - 1) return true;
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var next = diff[i + 1][1];
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if (next.length == 1 || next.charCodeAt(0) != 10) return false;
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if (i == diff.length - 2) return true;
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next = diff[i + 2][1];
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return next.length > 1 && next.charCodeAt(0) == 10;
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}
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function startOfLineClean(diff, i) {
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if (i == 0) return true;
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var last = diff[i - 1][1];
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if (last.charCodeAt(last.length - 1) != 10) return false;
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if (i == 1) return true;
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last = diff[i - 2][1];
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return last.charCodeAt(last.length - 1) == 10;
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}
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function chunkBoundariesAround(chunks, n, nInEdit) {
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var beforeE, afterE, beforeO, afterO;
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for (var i = 0; i < chunks.length; i++) {
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var chunk = chunks[i];
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var fromLocal = nInEdit ? chunk.editFrom : chunk.origFrom;
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var toLocal = nInEdit ? chunk.editTo : chunk.origTo;
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if (afterE == null) {
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if (fromLocal > n) { afterE = chunk.editFrom; afterO = chunk.origFrom; }
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else if (toLocal > n) { afterE = chunk.editTo; afterO = chunk.origTo; }
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}
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if (toLocal <= n) { beforeE = chunk.editTo; beforeO = chunk.origTo; }
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else if (fromLocal <= n) { beforeE = chunk.editFrom; beforeO = chunk.origFrom; }
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}
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return {edit: {before: beforeE, after: afterE}, orig: {before: beforeO, after: afterO}};
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}
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function collapseSingle(cm, from, to) {
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cm.addLineClass(from, "wrap", "CodeMirror-merge-collapsed-line");
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var widget = document.createElement("span");
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widget.className = "CodeMirror-merge-collapsed-widget";
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widget.title = "Identical text collapsed. Click to expand.";
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var mark = cm.markText(Pos(from, 0), Pos(to - 1), {
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inclusiveLeft: true,
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inclusiveRight: true,
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replacedWith: widget,
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clearOnEnter: true
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});
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function clear() {
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mark.clear();
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cm.removeLineClass(from, "wrap", "CodeMirror-merge-collapsed-line");
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}
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CodeMirror.on(widget, "click", clear);
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return {mark: mark, clear: clear};
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}
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function collapseStretch(size, editors) {
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var marks = [];
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function clear() {
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for (var i = 0; i < marks.length; i++) marks[i].clear();
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}
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for (var i = 0; i < editors.length; i++) {
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var editor = editors[i];
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var mark = collapseSingle(editor.cm, editor.line, editor.line + size);
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marks.push(mark);
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mark.mark.on("clear", clear);
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}
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return marks[0].mark;
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}
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function unclearNearChunks(dv, margin, off, clear) {
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for (var i = 0; i < dv.chunks.length; i++) {
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var chunk = dv.chunks[i];
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for (var l = chunk.editFrom - margin; l < chunk.editTo + margin; l++) {
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var pos = l + off;
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if (pos >= 0 && pos < clear.length) clear[pos] = false;
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}
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}
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}
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function collapseIdenticalStretches(mv, margin) {
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if (typeof margin != "number") margin = 2;
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var clear = [], edit = mv.editor(), off = edit.firstLine();
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for (var l = off, e = edit.lastLine(); l <= e; l++) clear.push(true);
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if (mv.left) unclearNearChunks(mv.left, margin, off, clear);
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if (mv.right) unclearNearChunks(mv.right, margin, off, clear);
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for (var i = 0; i < clear.length; i++) {
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if (clear[i]) {
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var line = i + off;
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for (var size = 1; i < clear.length - 1 && clear[i + 1]; i++, size++) {}
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if (size > margin) {
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var editors = [{line: line, cm: edit}];
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if (mv.left) editors.push({line: getMatchingOrigLine(line, mv.left.chunks), cm: mv.left.orig});
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if (mv.right) editors.push({line: getMatchingOrigLine(line, mv.right.chunks), cm: mv.right.orig});
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var mark = collapseStretch(size, editors);
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if (mv.options.onCollapse) mv.options.onCollapse(mv, line, size, mark);
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}
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}
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}
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}
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// General utilities
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function elt(tag, content, className, style) {
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var e = document.createElement(tag);
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if (className) e.className = className;
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if (style) e.style.cssText = style;
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if (typeof content == "string") e.appendChild(document.createTextNode(content));
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else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
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return e;
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}
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function clear(node) {
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for (var count = node.childNodes.length; count > 0; --count)
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node.removeChild(node.firstChild);
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}
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function attrs(elt) {
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for (var i = 1; i < arguments.length; i += 2)
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elt.setAttribute(arguments[i], arguments[i+1]);
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}
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function copyObj(obj, target) {
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if (!target) target = {};
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for (var prop in obj) if (obj.hasOwnProperty(prop)) target[prop] = obj[prop];
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return target;
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}
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function moveOver(pos, str, copy, other) {
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var out = copy ? Pos(pos.line, pos.ch) : pos, at = 0;
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for (;;) {
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var nl = str.indexOf("\n", at);
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if (nl == -1) break;
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++out.line;
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if (other) ++other.line;
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at = nl + 1;
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}
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out.ch = (at ? 0 : out.ch) + (str.length - at);
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if (other) other.ch = (at ? 0 : other.ch) + (str.length - at);
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return out;
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}
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function posMin(a, b) { return (a.line - b.line || a.ch - b.ch) < 0 ? a : b; }
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function posMax(a, b) { return (a.line - b.line || a.ch - b.ch) > 0 ? a : b; }
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function posEq(a, b) { return a.line == b.line && a.ch == b.ch; }
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function findPrevDiff(chunks, start, isOrig) {
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for (var i = chunks.length - 1; i >= 0; i--) {
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var chunk = chunks[i];
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var to = (isOrig ? chunk.origTo : chunk.editTo) - 1;
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if (to < start) return to;
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}
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}
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function findNextDiff(chunks, start, isOrig) {
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for (var i = 0; i < chunks.length; i++) {
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var chunk = chunks[i];
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var from = (isOrig ? chunk.origFrom : chunk.editFrom);
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if (from > start) return from;
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}
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}
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function goNearbyDiff(cm, dir) {
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var found = null, views = cm.state.diffViews, line = cm.getCursor().line;
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if (views) for (var i = 0; i < views.length; i++) {
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var dv = views[i], isOrig = cm == dv.orig;
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ensureDiff(dv);
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var pos = dir < 0 ? findPrevDiff(dv.chunks, line, isOrig) : findNextDiff(dv.chunks, line, isOrig);
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if (pos != null && (found == null || (dir < 0 ? pos > found : pos < found)))
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found = pos;
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}
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if (found != null)
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cm.setCursor(found, 0);
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else
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return CodeMirror.Pass;
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}
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CodeMirror.commands.goNextDiff = function(cm) {
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return goNearbyDiff(cm, 1);
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};
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CodeMirror.commands.goPrevDiff = function(cm) {
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return goNearbyDiff(cm, -1);
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};
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});
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