/** * Copyright (c) 2013 by Jamie Peabody, http://www.mergely.com * All rights reserved. * Version: 3.3.4 2013-11-02 * * NOTE by bkuhn@sfconservancy.org for Kallithea: * Mergely license appears at http://www.mergely.com/license.php and in LICENSE-MERGELY.html */ Mgly = {}; Mgly.Timer = function(){ var self = this; self.start = function() { self.t0 = new Date().getTime(); } self.stop = function() { var t1 = new Date().getTime(); var d = t1 - self.t0; self.t0 = t1; return d; } self.start(); } Mgly.ChangeExpression = new RegExp(/(\d+(?:,\d+)?)([acd])(\d+(?:,\d+)?)/); Mgly.DiffParser = function(diff) { var changes = []; var change_id = 0; // parse diff var diff_lines = diff.split(/\n/); for (var i = 0; i < diff_lines.length; ++i) { if (diff_lines[i].length == 0) continue; var change = {}; var test = Mgly.ChangeExpression.exec(diff_lines[i]); if (test == null) continue; // lines are zero-based var fr = test[1].split(','); change['lhs-line-from'] = fr[0] - 1; if (fr.length == 1) change['lhs-line-to'] = fr[0] - 1; else change['lhs-line-to'] = fr[1] - 1; var to = test[3].split(','); change['rhs-line-from'] = to[0] - 1; if (to.length == 1) change['rhs-line-to'] = to[0] - 1; else change['rhs-line-to'] = to[1] - 1; change['op'] = test[2]; changes[change_id++] = change; } return changes; } Mgly.sizeOf = function(obj) { var size = 0, key; for (key in obj) { if (obj.hasOwnProperty(key)) size++; } return size; } Mgly.LCS = function(x, y) { this.x = x.replace(/[ ]{1}/g, '\n'); this.y = y.replace(/[ ]{1}/g, '\n'); } jQuery.extend(Mgly.LCS.prototype, { clear: function() { this.ready = 0; }, diff: function(added, removed) { var d = new Mgly.diff(this.x, this.y, {ignorews: false}); var changes = Mgly.DiffParser(d.normal_form()); var li = 0, lj = 0; for (var i = 0; i < changes.length; ++i) { var change = changes[i]; if (change.op != 'a') { // find the starting index of the line li = d.getLines('lhs').slice(0, change['lhs-line-from']).join(' ').length; // get the index of the the span of the change lj = change['lhs-line-to'] + 1; // get the changed text var lchange = d.getLines('lhs').slice(change['lhs-line-from'], lj).join(' '); if (change.op == 'd') lchange += ' ';// include the leading space else if (li > 0 && change.op == 'c') li += 1; // ignore leading space if not first word // output the changed index and text removed(li, li + lchange.length); } if (change.op != 'd') { // find the starting index of the line li = d.getLines('lhs').slice(0, change['rhs-line-from']).join(' ').length; // get the index of the the span of the change lj = change['rhs-line-to'] + 1; // get the changed text var rchange = d.getLines('lhs').slice(change['rhs-line-from'], lj).join(' '); if (change.op == 'a') rchange += ' ';// include the leading space else if (li > 0 && change.op == 'c') li += 1; // ignore leading space if not first word // output the changed index and text added(li, li + rchange.length); } } } }); Mgly.CodeifyText = function(settings) { this._max_code = 0; this._diff_codes = {}; this.ctxs = {}; this.options = {ignorews: false}; jQuery.extend(this, settings); this.lhs = settings.lhs.split('\n'); this.rhs = settings.rhs.split('\n'); } jQuery.extend(Mgly.CodeifyText.prototype, { getCodes: function(side) { if (!this.ctxs.hasOwnProperty(side)) { var ctx = this._diff_ctx(this[side]); this.ctxs[side] = ctx; ctx.codes.length = Object.keys(ctx.codes).length; } return this.ctxs[side].codes; }, getLines: function(side) { return this.ctxs[side].lines; }, _diff_ctx: function(lines) { var ctx = {i: 0, codes: {}, lines: lines}; this._codeify(lines, ctx); return ctx; }, _codeify: function(lines, ctx) { var code = this._max_code; for (var i = 0; i < lines.length; ++i) { var line = lines[i]; if (this.options.ignorews) { line = line.replace(/\s+/g, ''); } var aCode = this._diff_codes[line]; if (aCode != undefined) { ctx.codes[i] = aCode; } else { this._max_code++; this._diff_codes[line] = this._max_code; ctx.codes[i] = this._max_code; } } } }); Mgly.diff = function(lhs, rhs, options) { var opts = jQuery.extend({ignorews: false}, options); this.codeify = new Mgly.CodeifyText({ lhs: lhs, rhs: rhs, options: opts }); var lhs_ctx = { codes: this.codeify.getCodes('lhs'), modified: {} }; var rhs_ctx = { codes: this.codeify.getCodes('rhs'), modified: {} }; var max = (lhs_ctx.codes.length + rhs_ctx.codes.length + 1); var vector_d = Array( 2 * max + 2 ); var vector_u = Array( 2 * max + 2 ); this._lcs(lhs_ctx, 0, lhs_ctx.codes.length, rhs_ctx, 0, rhs_ctx.codes.length, vector_u, vector_d); this._optimize(lhs_ctx); this._optimize(rhs_ctx); this.items = this._create_diffs(lhs_ctx, rhs_ctx); }; jQuery.extend(Mgly.diff.prototype, { changes: function() { return this.items; }, getLines: function(side) { return this.codeify.getLines(side); }, normal_form: function() { var nf = ''; for (var index = 0; index < this.items.length; ++index) { var item = this.items[index]; var lhs_str = ''; var rhs_str = ''; var change = 'c'; if (item.lhs_deleted_count == 0 && item.rhs_inserted_count > 0) change = 'a'; else if (item.lhs_deleted_count > 0 && item.rhs_inserted_count == 0) change = 'd'; if (item.lhs_deleted_count == 1) lhs_str = item.lhs_start + 1; else if (item.lhs_deleted_count == 0) lhs_str = item.lhs_start; else lhs_str = (item.lhs_start + 1) + ',' + (item.lhs_start + item.lhs_deleted_count); if (item.rhs_inserted_count == 1) rhs_str = item.rhs_start + 1; else if (item.rhs_inserted_count == 0) rhs_str = item.rhs_start; else rhs_str = (item.rhs_start + 1) + ',' + (item.rhs_start + item.rhs_inserted_count); nf += lhs_str + change + rhs_str + '\n'; if (this.rhs_lines && this.lhs_lines) { // if rhs/lhs lines have been retained, output contextual diff for (var i = item.lhs_start; i < item.lhs_start + item.lhs_deleted_count; ++i) { nf += '< ' + this.lhs_lines[i] + '\n'; } if (item.rhs_inserted_count && item.lhs_deleted_count) nf += '---\n'; for (var i = item.rhs_start; i < item.rhs_start + item.rhs_inserted_count; ++i) { nf += '> ' + this.rhs_lines[i] + '\n'; } } } return nf; }, _lcs: function(lhs_ctx, lhs_lower, lhs_upper, rhs_ctx, rhs_lower, rhs_upper, vector_u, vector_d) { while ( (lhs_lower < lhs_upper) && (rhs_lower < rhs_upper) && (lhs_ctx.codes[lhs_lower] == rhs_ctx.codes[rhs_lower]) ) { ++lhs_lower; ++rhs_lower; } while ( (lhs_lower < lhs_upper) && (rhs_lower < rhs_upper) && (lhs_ctx.codes[lhs_upper - 1] == rhs_ctx.codes[rhs_upper - 1]) ) { --lhs_upper; --rhs_upper; } if (lhs_lower == lhs_upper) { while (rhs_lower < rhs_upper) { rhs_ctx.modified[ rhs_lower++ ] = true; } } else if (rhs_lower == rhs_upper) { while (lhs_lower < lhs_upper) { lhs_ctx.modified[ lhs_lower++ ] = true; } } else { var sms = this._sms(lhs_ctx, lhs_lower, lhs_upper, rhs_ctx, rhs_lower, rhs_upper, vector_u, vector_d); this._lcs(lhs_ctx, lhs_lower, sms.x, rhs_ctx, rhs_lower, sms.y, vector_u, vector_d); this._lcs(lhs_ctx, sms.x, lhs_upper, rhs_ctx, sms.y, rhs_upper, vector_u, vector_d); } }, _sms: function(lhs_ctx, lhs_lower, lhs_upper, rhs_ctx, rhs_lower, rhs_upper, vector_u, vector_d) { var max = lhs_ctx.codes.length + rhs_ctx.codes.length + 1; var kdown = lhs_lower - rhs_lower; var kup = lhs_upper - rhs_upper; var delta = (lhs_upper - lhs_lower) - (rhs_upper - rhs_lower); var odd = (delta & 1) != 0; var offset_down = max - kdown; var offset_up = max - kup; var maxd = ((lhs_upper - lhs_lower + rhs_upper - rhs_lower) / 2) + 1; vector_d[ offset_down + kdown + 1 ] = lhs_lower; vector_u[ offset_up + kup - 1 ] = lhs_upper; var ret = {x:0,y:0}; for (var d = 0; d <= maxd; ++d) { for (var k = kdown - d; k <= kdown + d; k += 2) { var x, y; if (k == kdown - d) { x = vector_d[ offset_down + k + 1 ];//down } else { x = vector_d[ offset_down + k - 1 ] + 1;//right if ((k < (kdown + d)) && (vector_d[ offset_down + k + 1 ] >= x)) { x = vector_d[ offset_down + k + 1 ];//down } } y = x - k; // find the end of the furthest reaching forward D-path in diagonal k. while ((x < lhs_upper) && (y < rhs_upper) && (lhs_ctx.codes[x] == rhs_ctx.codes[y])) { x++; y++; } vector_d[ offset_down + k ] = x; // overlap ? if (odd && (kup - d < k) && (k < kup + d)) { if (vector_u[offset_up + k] <= vector_d[offset_down + k]) { ret.x = vector_d[offset_down + k]; ret.y = vector_d[offset_down + k] - k; return (ret); } } } // Extend the reverse path. for (var k = kup - d; k <= kup + d; k += 2) { // find the only or better starting point var x, y; if (k == kup + d) { x = vector_u[offset_up + k - 1]; // up } else { x = vector_u[offset_up + k + 1] - 1; // left if ((k > kup - d) && (vector_u[offset_up + k - 1] < x)) x = vector_u[offset_up + k - 1]; // up } y = x - k; while ((x > lhs_lower) && (y > rhs_lower) && (lhs_ctx.codes[x - 1] == rhs_ctx.codes[y - 1])) { // diagonal x--; y--; } vector_u[offset_up + k] = x; // overlap ? if (!odd && (kdown - d <= k) && (k <= kdown + d)) { if (vector_u[offset_up + k] <= vector_d[offset_down + k]) { ret.x = vector_d[offset_down + k]; ret.y = vector_d[offset_down + k] - k; return (ret); } } } } throw "the algorithm should never come here."; }, _optimize: function(ctx) { var start = 0, end = 0; while (start < ctx.length) { while ((start < ctx.length) && (ctx.modified[start] == undefined || ctx.modified[start] == false)) { start++; } end = start; while ((end < ctx.length) && (ctx.modified[end] == true)) { end++; } if ((end < ctx.length) && (ctx.ctx[start] == ctx.codes[end])) { ctx.modified[start] = false; ctx.modified[end] = true; } else { start = end; } } }, _create_diffs: function(lhs_ctx, rhs_ctx) { var items = []; var lhs_start = 0, rhs_start = 0; var lhs_line = 0, rhs_line = 0; while (lhs_line < lhs_ctx.codes.length || rhs_line < rhs_ctx.codes.length) { if ((lhs_line < lhs_ctx.codes.length) && (!lhs_ctx.modified[lhs_line]) && (rhs_line < rhs_ctx.codes.length) && (!rhs_ctx.modified[rhs_line])) { // equal lines lhs_line++; rhs_line++; } else { // maybe deleted and/or inserted lines lhs_start = lhs_line; rhs_start = rhs_line; while (lhs_line < lhs_ctx.codes.length && (rhs_line >= rhs_ctx.codes.length || lhs_ctx.modified[lhs_line])) lhs_line++; while (rhs_line < rhs_ctx.codes.length && (lhs_line >= lhs_ctx.codes.length || rhs_ctx.modified[rhs_line])) rhs_line++; if ((lhs_start < lhs_line) || (rhs_start < rhs_line)) { // store a new difference-item items.push({ lhs_start: lhs_start, rhs_start: rhs_start, lhs_deleted_count: lhs_line - lhs_start, rhs_inserted_count: rhs_line - rhs_start }); } } } return items; } }); Mgly.mergely = function(el, options) { if (el) { this.init(el, options); } }; jQuery.extend(Mgly.mergely.prototype, { name: 'mergely', //http://jupiterjs.com/news/writing-the-perfect-jquery-plugin init: function(el, options) { this.diffView = new Mgly.CodeMirrorDiffView(el, options); this.bind(el); }, bind: function(el) { this.diffView.bind(el); } }); Mgly.CodeMirrorDiffView = function(el, options) { CodeMirror.defineExtension('centerOnCursor', function() { var coords = this.cursorCoords(null, 'local'); this.scrollTo(null, (coords.y + coords.yBot) / 2 - (this.getScrollerElement().clientHeight / 2)); }); this.init(el, options); }; jQuery.extend(Mgly.CodeMirrorDiffView.prototype, { init: function(el, options) { this.settings = { autoupdate: true, autoresize: true, rhs_margin: 'right', lcs: true, sidebar: true, viewport: false, ignorews: false, fadein: 'fast', editor_width: '400px', editor_height: '400px', resize_timeout: 500, change_timeout: 150, fgcolor: {a:'#4ba3fa',c:'#a3a3a3',d:'#ff7f7f'}, bgcolor: '#eee', vpcolor: 'rgba(0, 0, 200, 0.5)', lhs: function(setValue) { }, rhs: function(setValue) { }, loaded: function() { }, //_auto_height: function(h) { return h - 20; }, _auto_width: function(w) { return w; }, resize: function(init) { var scrollbar = init ? 16 : 0; var w = jQuery(el).parent().width() + scrollbar; if (this.width == 'auto') { w = this._auto_width(w); } else { w = this.width; this.editor_width = w; } if (this.height == 'auto') { //h = this._auto_height(h); h = jQuery(el).parent().height(); } else { h = this.height; this.editor_height = h; } var content_width = w / 2.0 - 2 * 8 - 8; var content_height = h; var self = jQuery(el); self.find('.mergely-column').css({ width: content_width + 'px' }); self.find('.mergely-column, .mergely-canvas, .mergely-margin, .mergely-column textarea, .CodeMirror-scroll, .cm-s-default').css({ height: content_height + 'px' }); self.find('.mergely-canvas').css({ height: content_height + 'px' }); self.find('.mergely-column textarea').css({ width: content_width + 'px' }); self.css({ width: w, height: h, clear: 'both' }); if (self.css('display') == 'none') { if (this.fadein != false) self.fadeIn(this.fadein); else self.show(); if (this.loaded) this.loaded(); } if (this.resized) this.resized(); }, _debug: '', //scroll,draw,calc,diff,markup,change resized: function() { } }; var cmsettings = { mode: 'text/plain', readOnly: false, lineWrapping: false, lineNumbers: true, gutters: ['merge', 'CodeMirror-linenumbers'] } this.lhs_cmsettings = {}; this.rhs_cmsettings = {}; // save this element for faster queries this.element = jQuery(el); // save options if there are any if (options && options.cmsettings) jQuery.extend(this.lhs_cmsettings, cmsettings, options.cmsettings, options.lhs_cmsettings); if (options && options.cmsettings) jQuery.extend(this.rhs_cmsettings, cmsettings, options.cmsettings, options.rhs_cmsettings); if (options) jQuery.extend(this.settings, options); // bind if the element is destroyed this.element.bind('destroyed', jQuery.proxy(this.teardown, this)); // save this instance in jQuery data, binding this view to the node jQuery.data(el, 'mergely', this); }, unbind: function() { if (this.changed_timeout != null) clearTimeout(this.changed_timeout); this.editor[this.id + '-lhs'].toTextArea(); this.editor[this.id + '-rhs'].toTextArea(); }, destroy: function() { this.element.unbind('destroyed', this.teardown); this.teardown(); }, teardown: function() { this.unbind(); }, lhs: function(text) { this.editor[this.id + '-lhs'].setValue(text); }, rhs: function(text) { this.editor[this.id + '-rhs'].setValue(text); }, update: function() { this._changing(this.id + '-lhs', this.id + '-rhs'); }, unmarkup: function() { this._clear(); }, scrollTo: function(side, num) { var le = this.editor[this.id + '-lhs']; var re = this.editor[this.id + '-rhs']; if (side == 'lhs') { le.setCursor(num); le.centerOnCursor(); } else { re.setCursor(num); re.centerOnCursor(); } }, options: function(opts) { if (opts) { jQuery.extend(this.settings, opts); if (this.settings.autoresize) this.resize(); if (this.settings.autoupdate) this.update(); if (this.settings.hasOwnProperty('rhs_margin')) { // dynamically swap the margin if (this.settings.rhs_margin == 'left') { this.element.find('.mergely-margin:last-child').insertAfter( this.element.find('.mergely-canvas')); } else { var target = this.element.find('.mergely-margin').last(); target.appendTo(target.parent()); } } if (this.settings.hasOwnProperty('sidebar')) { // dynamically enable sidebars if (this.settings.sidebar) { jQuery(this.element).find('.mergely-margin').css({display: 'block'}); } else { jQuery(this.element).find('.mergely-margin').css({display: 'none'}); } } } else { return this.settings; } }, swap: function() { if (this.lhs_cmsettings.readOnly || this.rhs_cmsettings.readOnly) return; var le = this.editor[this.id + '-lhs']; var re = this.editor[this.id + '-rhs']; var tmp = re.getValue(); re.setValue(le.getValue()); le.setValue(tmp); }, merge: function(side) { var le = this.editor[this.id + '-lhs']; var re = this.editor[this.id + '-rhs']; if (side == 'lhs' && !this.lhs_cmsettings.readOnly) le.setValue(re.getValue()); else if (!this.rhs_cmsettings.readOnly) re.setValue(le.getValue()); }, get: function(side) { var ed = this.editor[this.id + '-' + side]; var t = ed.getValue(); if (t == undefined) return ''; return t; }, clear: function(side) { if (side == 'lhs' && this.lhs_cmsettings.readOnly) return; if (side == 'rhs' && this.rhs_cmsettings.readOnly) return; var ed = this.editor[this.id + '-' + side]; ed.setValue(''); }, cm: function(side) { return this.editor[this.id + '-' + side]; }, search: function(side, query, direction) { var le = this.editor[this.id + '-lhs']; var re = this.editor[this.id + '-rhs']; var editor; if (side == 'lhs') editor = le; else editor = re; direction = (direction == 'prev') ? 'findPrevious' : 'findNext'; if ((editor.getSelection().length == 0) || (this.prev_query[side] != query)) { this.cursor[this.id] = editor.getSearchCursor(query, { line: 0, ch: 0 }, false); this.prev_query[side] = query; } var cursor = this.cursor[this.id]; if (cursor[direction]()) { editor.setSelection(cursor.from(), cursor.to()); } else { cursor = editor.getSearchCursor(query, { line: 0, ch: 0 }, false); } }, resize: function() { this.settings.resize(); this._changing(this.id + '-lhs', this.id + '-rhs'); this._set_top_offset(this.id + '-lhs'); }, diff: function() { var lhs = this.editor[this.id + '-lhs'].getValue(); var rhs = this.editor[this.id + '-rhs'].getValue(); var d = new Mgly.diff(lhs, rhs, this.settings); return d.normal_form(); }, bind: function(el) { jQuery(this.element).hide();//hide this.id = jQuery(el).attr('id'); var height = this.settings.editor_height; var width = this.settings.editor_width; this.changed_timeout = null; this.chfns = {}; this.chfns[this.id + '-lhs'] = []; this.chfns[this.id + '-rhs'] = []; this.prev_query = []; this.cursor = []; this._skipscroll = {}; this.change_exp = new RegExp(/(\d+(?:,\d+)?)([acd])(\d+(?:,\d+)?)/); var merge_lhs_button; var merge_rhs_button; if (jQuery.button != undefined) { //jquery ui merge_lhs_button = ''; merge_rhs_button = ''; } else { // homebrew var style = 'opacity:0.4;width:10px;height:15px;background-color:#888;cursor:pointer;text-align:center;color:#eee;border:1px solid: #222;margin-right:5px;'; merge_lhs_button = '
<
'; merge_rhs_button = '
>
'; } this.merge_rhs_button = jQuery(merge_rhs_button); this.merge_lhs_button = jQuery(merge_lhs_button); // create the textarea and canvas elements jQuery(this.element).append(jQuery('
')); jQuery(this.element).append(jQuery('
')); jQuery(this.element).append(jQuery('
')); var rmargin = jQuery('
'); if (!this.settings.sidebar) { jQuery(this.element).find('.mergely-margin').css({display: 'none'}); } if (this.settings.rhs_margin == 'left') { jQuery(this.element).append(rmargin); } jQuery(this.element).append(jQuery('
')); if (this.settings.rhs_margin != 'left') { jQuery(this.element).append(rmargin); } //codemirror var cmstyle = '#' + this.id + ' .CodeMirror-gutter-text { padding: 5px 0 0 0; }' + '#' + this.id + ' .CodeMirror-lines pre, ' + '#' + this.id + ' .CodeMirror-gutter-text pre { line-height: 18px; }' + '.CodeMirror-linewidget { overflow: hidden; };'; if (this.settings.autoresize) { cmstyle += this.id + ' .CodeMirror-scroll { height: 100%; overflow: auto; }'; } jQuery('').appendTo('head'); //bind var rhstx = jQuery('#' + this.id + '-rhs').get(0); if (!rhstx) { console.error('rhs textarea not defined - Mergely not initialized properly'); return; } var lhstx = jQuery('#' + this.id + '-lhs').get(0); if (!rhstx) { console.error('lhs textarea not defined - Mergely not initialized properly'); return; } var self = this; this.editor = []; this.editor[this.id + '-lhs'] = CodeMirror.fromTextArea(lhstx, this.lhs_cmsettings); this.editor[this.id + '-rhs'] = CodeMirror.fromTextArea(rhstx, this.rhs_cmsettings); this.editor[this.id + '-lhs'].on('change', function(){ if (self.settings.autoupdate) self._changing(self.id + '-lhs', self.id + '-rhs'); }); this.editor[this.id + '-lhs'].on('scroll', function(){ self._scrolling(self.id + '-lhs'); }); this.editor[this.id + '-rhs'].on('change', function(){ if (self.settings.autoupdate) self._changing(self.id + '-lhs', self.id + '-rhs'); }); this.editor[this.id + '-rhs'].on('scroll', function(){ self._scrolling(self.id + '-rhs'); }); // resize if (this.settings.autoresize) { var sz_timeout1 = null; var sz = function(init) { //self.em_height = null; //recalculate if (self.settings.resize) self.settings.resize(init); self.editor[self.id + '-lhs'].refresh(); self.editor[self.id + '-rhs'].refresh(); if (self.settings.autoupdate) { self._changing(self.id + '-lhs', self.id + '-rhs'); } } jQuery(window).resize( function () { if (sz_timeout1) clearTimeout(sz_timeout1); sz_timeout1 = setTimeout(sz, self.settings.resize_timeout); } ); sz(true); } //bind if (this.settings.lhs) { var setv = this.editor[this.id + '-lhs'].getDoc().setValue; this.settings.lhs(setv.bind(this.editor[this.id + '-lhs'].getDoc())); } if (this.settings.rhs) { var setv = this.editor[this.id + '-rhs'].getDoc().setValue; this.settings.rhs(setv.bind(this.editor[this.id + '-rhs'].getDoc())); } }, _scrolling: function(editor_name) { if (this._skipscroll[editor_name] === true) { // scrolling one side causes the other to event - ignore it this._skipscroll[editor_name] = false; return; } var scroller = jQuery(this.editor[editor_name].getScrollerElement()); if (this.midway == undefined) { this.midway = (scroller.height() / 2.0 + scroller.offset().top).toFixed(2); } // balance-line var midline = this.editor[editor_name].coordsChar({left:0, top:this.midway}); var top_to = scroller.scrollTop(); var left_to = scroller.scrollLeft(); this.trace('scroll', 'side', editor_name); this.trace('scroll', 'midway', this.midway); this.trace('scroll', 'midline', midline); this.trace('scroll', 'top_to', top_to); this.trace('scroll', 'left_to', left_to); var editor_name1 = this.id + '-lhs'; var editor_name2 = this.id + '-rhs'; for (var name in this.editor) { if (!this.editor.hasOwnProperty(name)) continue; if (editor_name == name) continue; //same editor var this_side = editor_name.replace(this.id + '-', ''); var other_side = name.replace(this.id + '-', ''); var top_adjust = 0; // find the last change that is less than or within the midway point // do not move the rhs until the lhs end point is >= the rhs end point. var last_change = null; var force_scroll = false; for (var i = 0; i < this.changes.length; ++i) { var change = this.changes[i]; if ((midline.line >= change[this_side+'-line-from'])) { last_change = change; if (midline.line >= last_change[this_side+'-line-to']) { if (!change.hasOwnProperty(this_side+'-y-start') || !change.hasOwnProperty(this_side+'-y-end') || !change.hasOwnProperty(other_side+'-y-start') || !change.hasOwnProperty(other_side+'-y-end')){ // change outside of viewport force_scroll = true; } else { top_adjust += (change[this_side+'-y-end'] - change[this_side+'-y-start']) - (change[other_side+'-y-end'] - change[other_side+'-y-start']); } } } } var vp = this.editor[name].getViewport(); var scroll = true; if (last_change) { this.trace('scroll', 'last change before midline', last_change); if (midline.line >= vp.from && midline <= vp.to) { scroll = false; } } this.trace('scroll', 'scroll', scroll); if (scroll || force_scroll) { // scroll the other side this.trace('scroll', 'scrolling other side', top_to - top_adjust); var scroller = jQuery(this.editor[name].getScrollerElement()); this._skipscroll[name] = true;//disable next event scroller.scrollTop(top_to - top_adjust).scrollLeft(left_to); } else this.trace('scroll', 'not scrolling other side'); if (this.settings.autoupdate) { var timer = new Mgly.Timer(); this._calculate_offsets(editor_name1, editor_name2, this.changes); this.trace('change', 'offsets time', timer.stop()); this._markup_changes(editor_name1, editor_name2, this.changes); this.trace('change', 'markup time', timer.stop()); this._draw_diff(editor_name1, editor_name2, this.changes); this.trace('change', 'draw time', timer.stop()); } this.trace('scroll', 'scrolled'); } }, _changing: function(editor_name1, editor_name2) { this.trace('change', 'changing-timeout', this.changed_timeout); var self = this; if (this.changed_timeout != null) clearTimeout(this.changed_timeout); this.changed_timeout = setTimeout(function(){ var timer = new Mgly.Timer(); self._changed(editor_name1, editor_name2); self.trace('change', 'total time', timer.stop()); }, this.settings.change_timeout); }, _changed: function(editor_name1, editor_name2) { this._clear(); this._diff(editor_name1, editor_name2); }, _clear: function() { var self = this; for (var name in this.editor) { if (!this.editor.hasOwnProperty(name)) continue; var editor = this.editor[name]; var fns = self.chfns[name]; // clear editor changes editor.operation(function() { var timer = new Mgly.Timer(); for (var i = 0, l = editor.lineCount(); i < l; ++i) { editor.removeLineClass(i, 'background'); } for (var i = 0; i < fns.length; ++i) { //var edid = editor.getDoc().id; var change = fns[i]; //if (change.doc.id != edid) continue; if (change.lines.length) { self.trace('change', 'clear text', change.lines[0].text); } change.clear(); } editor.clearGutter('merge'); self.trace('change', 'clear time', timer.stop()); }); } self.chfns[name] = []; var ex = this._draw_info(this.id + '-lhs', this.id + '-rhs'); var ctx_lhs = ex.clhs.get(0).getContext('2d'); var ctx_rhs = ex.crhs.get(0).getContext('2d'); var ctx = ex.dcanvas.getContext('2d'); ctx_lhs.beginPath(); ctx_lhs.fillStyle = this.settings.bgcolor; ctx_lhs.strokeStyle = '#888'; ctx_lhs.fillRect(0, 0, 6.5, ex.visible_page_height); ctx_lhs.strokeRect(0, 0, 6.5, ex.visible_page_height); ctx_rhs.beginPath(); ctx_rhs.fillStyle = this.settings.bgcolor; ctx_rhs.strokeStyle = '#888'; ctx_rhs.fillRect(0, 0, 6.5, ex.visible_page_height); ctx_rhs.strokeRect(0, 0, 6.5, ex.visible_page_height); ctx.beginPath(); ctx.fillStyle = '#fff'; ctx.fillRect(0, 0, this.draw_mid_width, ex.visible_page_height); }, _diff: function(editor_name1, editor_name2) { var lhs = this.editor[editor_name1].getValue(); var rhs = this.editor[editor_name2].getValue(); var timer = new Mgly.Timer(); var d = new Mgly.diff(lhs, rhs, this.settings); this.trace('change', 'diff time', timer.stop()); this.changes = Mgly.DiffParser(d.normal_form()); this.trace('change', 'parse time', timer.stop()); this._calculate_offsets(editor_name1, editor_name2, this.changes); this.trace('change', 'offsets time', timer.stop()); this._markup_changes(editor_name1, editor_name2, this.changes); this.trace('change', 'markup time', timer.stop()); this._draw_diff(editor_name1, editor_name2, this.changes); this.trace('change', 'draw time', timer.stop()); }, _parse_diff: function (editor_name1, editor_name2, diff) { this.trace('diff', 'diff results:\n', diff); var changes = []; var change_id = 0; // parse diff var diff_lines = diff.split(/\n/); for (var i = 0; i < diff_lines.length; ++i) { if (diff_lines[i].length == 0) continue; var change = {}; var test = this.change_exp.exec(diff_lines[i]); if (test == null) continue; // lines are zero-based var fr = test[1].split(','); change['lhs-line-from'] = fr[0] - 1; if (fr.length == 1) change['lhs-line-to'] = fr[0] - 1; else change['lhs-line-to'] = fr[1] - 1; var to = test[3].split(','); change['rhs-line-from'] = to[0] - 1; if (to.length == 1) change['rhs-line-to'] = to[0] - 1; else change['rhs-line-to'] = to[1] - 1; // TODO: optimize for changes that are adds/removes if (change['lhs-line-from'] < 0) change['lhs-line-from'] = 0; if (change['lhs-line-to'] < 0) change['lhs-line-to'] = 0; if (change['rhs-line-from'] < 0) change['rhs-line-from'] = 0; if (change['rhs-line-to'] < 0) change['rhs-line-to'] = 0; change['op'] = test[2]; changes[change_id++] = change; this.trace('diff', 'change', change); } return changes; }, _get_viewport: function(editor_name1, editor_name2) { var lhsvp = this.editor[editor_name1].getViewport(); var rhsvp = this.editor[editor_name2].getViewport(); return {from: Math.min(lhsvp.from, rhsvp.from), to: Math.max(lhsvp.to, rhsvp.to)}; }, _is_change_in_view: function(vp, change) { if (!this.settings.viewport) return true; if ((change['lhs-line-from'] < vp.from && change['lhs-line-to'] < vp.to) || (change['lhs-line-from'] > vp.from && change['lhs-line-to'] > vp.to) || (change['rhs-line-from'] < vp.from && change['rhs-line-to'] < vp.to) || (change['rhs-line-from'] > vp.from && change['rhs-line-to'] > vp.to)) { // if the change is outside the viewport, skip return false; } return true; }, _set_top_offset: function (editor_name1) { // save the current scroll position of the editor var saveY = this.editor[editor_name1].getScrollInfo().top; // temporarily scroll to top this.editor[editor_name1].scrollTo(null, 0); // this is the distance from the top of the screen to the top of the // content of the first codemirror editor var topnode = jQuery('#' + this.id + ' .CodeMirror-measure').first(); var top_offset = topnode.offset().top - 4; if(!top_offset) return false; // restore editor's scroll position this.editor[editor_name1].scrollTo(null, saveY); this.draw_top_offset = 0.5 - top_offset; return true; }, _calculate_offsets: function (editor_name1, editor_name2, changes) { if (this.em_height == null) { if(!this._set_top_offset(editor_name1)) return; //try again this.em_height = this.editor[editor_name1].defaultTextHeight(); if (!this.em_height) { console.warn('Failed to calculate offsets, using 18 by default'); this.em_height = 18; } this.draw_lhs_min = 0.5; var c = jQuery('#' + editor_name1 + '-' + editor_name2 + '-canvas'); if (!c.length) { console.error('failed to find canvas', '#' + editor_name1 + '-' + editor_name2 + '-canvas'); } if (!c.width()) { console.error('canvas width is 0'); return; } this.draw_mid_width = jQuery('#' + editor_name1 + '-' + editor_name2 + '-canvas').width(); this.draw_rhs_max = this.draw_mid_width - 0.5; //24.5; this.draw_lhs_width = 5; this.draw_rhs_width = 5; this.trace('calc', 'change offsets calculated', {top_offset: this.draw_top_offset, lhs_min: this.draw_lhs_min, rhs_max: this.draw_rhs_max, lhs_width: this.draw_lhs_width, rhs_width: this.draw_rhs_width}); } var lhschc = this.editor[editor_name1].charCoords({line: 0}); var rhschc = this.editor[editor_name2].charCoords({line: 0}); var vp = this._get_viewport(editor_name1, editor_name2); for (var i = 0; i < changes.length; ++i) { var change = changes[i]; if (!this.settings.sidebar && !this._is_change_in_view(vp, change)) { // if the change is outside the viewport, skip delete change['lhs-y-start']; delete change['lhs-y-end']; delete change['rhs-y-start']; delete change['rhs-y-end']; continue; } var llf = change['lhs-line-from'] >= 0 ? change['lhs-line-from'] : 0; var llt = change['lhs-line-to'] >= 0 ? change['lhs-line-to'] : 0; var rlf = change['rhs-line-from'] >= 0 ? change['rhs-line-from'] : 0; var rlt = change['rhs-line-to'] >= 0 ? change['rhs-line-to'] : 0; var ls, le, rs, re; if (this.editor[editor_name1].getOption('lineWrapping') || this.editor[editor_name1].getOption('lineWrapping')) { // If using line-wrapping, we must get the height of the line var tls = this.editor[editor_name1].cursorCoords({line: llf, ch: 0}, 'page'); var lhssh = this.editor[editor_name1].getLineHandle(llf); ls = { top: tls.top, bottom: tls.top + lhssh.height }; var tle = this.editor[editor_name1].cursorCoords({line: llt, ch: 0}, 'page'); var lhseh = this.editor[editor_name1].getLineHandle(llt); le = { top: tle.top, bottom: tle.top + lhseh.height }; var tls = this.editor[editor_name2].cursorCoords({line: rlf, ch: 0}, 'page'); var rhssh = this.editor[editor_name2].getLineHandle(rlf); rs = { top: tls.top, bottom: tls.top + rhssh.height }; var tle = this.editor[editor_name2].cursorCoords({line: rlt, ch: 0}, 'page'); var rhseh = this.editor[editor_name2].getLineHandle(rlt); re = { top: tle.top, bottom: tle.top + rhseh.height }; } else { // If not using line-wrapping, we can calculate the line position ls = { top: lhschc.top + llf * this.em_height, bottom: lhschc.bottom + llf * this.em_height + 2 }; le = { top: lhschc.top + llt * this.em_height, bottom: lhschc.bottom + llt * this.em_height + 2 }; rs = { top: rhschc.top + rlf * this.em_height, bottom: rhschc.bottom + rlf * this.em_height + 2 }; re = { top: rhschc.top + rlt * this.em_height, bottom: rhschc.bottom + rlt * this.em_height + 2 }; } if (change['op'] == 'a') { // adds (right), normally start from the end of the lhs, // except for the case when the start of the rhs is 0 if (rlf > 0) { ls.top = ls.bottom; ls.bottom += this.em_height; le = ls; } } else if (change['op'] == 'd') { // deletes (left) normally finish from the end of the rhs, // except for the case when the start of the lhs is 0 if (llf > 0) { rs.top = rs.bottom; rs.bottom += this.em_height; re = rs; } } change['lhs-y-start'] = this.draw_top_offset + ls.top; if (change['op'] == 'c' || change['op'] == 'd') { change['lhs-y-end'] = this.draw_top_offset + le.bottom; } else { change['lhs-y-end'] = this.draw_top_offset + le.top; } change['rhs-y-start'] = this.draw_top_offset + rs.top; if (change['op'] == 'c' || change['op'] == 'a') { change['rhs-y-end'] = this.draw_top_offset + re.bottom; } else { change['rhs-y-end'] = this.draw_top_offset + re.top; } this.trace('calc', 'change calculated', i, change); } return changes; }, _markup_changes: function (editor_name1, editor_name2, changes) { jQuery('.merge-button').remove(); // clear var self = this; var led = this.editor[editor_name1]; var red = this.editor[editor_name2]; var timer = new Mgly.Timer(); led.operation(function() { for (var i = 0; i < changes.length; ++i) { var change = changes[i]; var llf = change['lhs-line-from'] >= 0 ? change['lhs-line-from'] : 0; var llt = change['lhs-line-to'] >= 0 ? change['lhs-line-to'] : 0; var rlf = change['rhs-line-from'] >= 0 ? change['rhs-line-from'] : 0; var rlt = change['rhs-line-to'] >= 0 ? change['rhs-line-to'] : 0; var clazz = ['mergely', 'lhs', change['op'], 'cid-' + i]; led.addLineClass(llf, 'background', 'start'); led.addLineClass(llt, 'background', 'end'); if (llf == 0 && llt == 0 && rlf == 0) { led.addLineClass(llf, 'background', clazz.join(' ')); led.addLineClass(llf, 'background', 'first'); } else { // apply change for each line in-between the changed lines for (var j = llf; j <= llt; ++j) { led.addLineClass(j, 'background', clazz.join(' ')); led.addLineClass(j, 'background', clazz.join(' ')); } } if (!red.getOption('readOnly')) { // add widgets to lhs, if rhs is not read only var rhs_button = self.merge_rhs_button.clone(); if (rhs_button.button) { //jquery-ui support rhs_button.button({icons: {primary: 'ui-icon-triangle-1-e'}, text: false}); } rhs_button.addClass('merge-button'); rhs_button.attr('id', 'merge-rhs-' + i); led.setGutterMarker(llf, 'merge', rhs_button.get(0)); } } }); var vp = this._get_viewport(editor_name1, editor_name2); this.trace('change', 'markup lhs-editor time', timer.stop()); red.operation(function() { for (var i = 0; i < changes.length; ++i) { var change = changes[i]; var llf = change['lhs-line-from'] >= 0 ? change['lhs-line-from'] : 0; var llt = change['lhs-line-to'] >= 0 ? change['lhs-line-to'] : 0; var rlf = change['rhs-line-from'] >= 0 ? change['rhs-line-from'] : 0; var rlt = change['rhs-line-to'] >= 0 ? change['rhs-line-to'] : 0; if (!self._is_change_in_view(vp, change)) { // if the change is outside the viewport, skip continue; } var clazz = ['mergely', 'rhs', change['op'], 'cid-' + i]; red.addLineClass(rlf, 'background', 'start'); red.addLineClass(rlt, 'background', 'end'); if (rlf == 0 && rlt == 0 && llf == 0) { red.addLineClass(rlf, 'background', clazz.join(' ')); red.addLineClass(rlf, 'background', 'first'); } else { // apply change for each line in-between the changed lines for (var j = rlf; j <= rlt; ++j) { red.addLineClass(j, 'background', clazz.join(' ')); red.addLineClass(j, 'background', clazz.join(' ')); } } if (!led.getOption('readOnly')) { // add widgets to rhs, if lhs is not read only var lhs_button = self.merge_lhs_button.clone(); if (lhs_button.button) { //jquery-ui support lhs_button.button({icons: {primary: 'ui-icon-triangle-1-w'}, text: false}); } lhs_button.addClass('merge-button'); lhs_button.attr('id', 'merge-lhs-' + i); red.setGutterMarker(rlf, 'merge', lhs_button.get(0)); } } }); this.trace('change', 'markup rhs-editor time', timer.stop()); // mark text deleted, LCS changes var marktext = []; for (var i = 0; this.settings.lcs && i < changes.length; ++i) { var change = changes[i]; var llf = change['lhs-line-from'] >= 0 ? change['lhs-line-from'] : 0; var llt = change['lhs-line-to'] >= 0 ? change['lhs-line-to'] : 0; var rlf = change['rhs-line-from'] >= 0 ? change['rhs-line-from'] : 0; var rlt = change['rhs-line-to'] >= 0 ? change['rhs-line-to'] : 0; if (!this._is_change_in_view(vp, change)) { // if the change is outside the viewport, skip continue; } if (change['op'] == 'd') { // apply delete to cross-out (left-hand side only) var from = llf; var to = llt; var to_ln = led.lineInfo(to); if (to_ln) { marktext.push([led, {line:from, ch:0}, {line:to, ch:to_ln.text.length}, {className: 'mergely ch d lhs'}]); } } else if (change['op'] == 'c') { // apply LCS changes to each line for (var j = llf, k = rlf, p = 0; ((j >= 0) && (j <= llt)) || ((k >= 0) && (k <= rlt)); ++j, ++k) { if (k + p > rlt) { // lhs continues past rhs, mark lhs as deleted var lhs_line = led.getLine( j ); marktext.push([led, {line:j, ch:0}, {line:j, ch:lhs_line.length}, {className: 'mergely ch d lhs'}]); continue; } if (j + p > llt) { // rhs continues past lhs, mark rhs as added var rhs_line = red.getLine( k ); marktext.push([red, {line:k, ch:0}, {line:k, ch:rhs_line.length}, {className: 'mergely ch a rhs'}]); continue; } var lhs_line = led.getLine( j ); var rhs_line = red.getLine( k ); var lhs_start = { line: -1, ch: -1 }; var lhs_stop = { line: -1, ch: -1 }; var rhs_start = { line: -1, ch: -1 }; var rhs_stop = { line: -1, ch: -1 }; var lcs = new Mgly.LCS(lhs_line, rhs_line); lcs.diff( function (from, to) {//added marktext.push([red, {line:k, ch:from}, {line:k, ch:to}, {className: 'mergely ch a rhs'}]); }, removed = function (from, to) {//removed marktext.push([led, {line:j, ch:from}, {line:j, ch:to}, {className: 'mergely ch d lhs'}]); } ); } } } this.trace('change', 'LCS marktext time', timer.stop()); // mark changes outside closure led.operation(function() { // apply lhs markup for (var i = 0; i < marktext.length; ++i) { var m = marktext[i]; if (m[0].doc.id != led.getDoc().id) continue; self.chfns[self.id + '-lhs'].push(m[0].markText(m[1], m[2], m[3])); } }); red.operation(function() { // apply lhs markup for (var i = 0; i < marktext.length; ++i) { var m = marktext[i]; if (m[0].doc.id != red.getDoc().id) continue; self.chfns[self.id + '-rhs'].push(m[0].markText(m[1], m[2], m[3])); } }); this.trace('change', 'LCS markup time', timer.stop()); // merge buttons var ed = {lhs:led, rhs:red}; jQuery('.merge-button').on('click', function(ev){ // side of mouseenter var side = 'rhs'; var oside = 'lhs'; var parent = jQuery(this).parents('#' + self.id + '-editor-lhs'); if (parent.length) { side = 'lhs'; oside = 'rhs'; } var pos = ed[side].coordsChar({left:ev.pageX, top:ev.pageY}); // get the change id var cid = null; var info = ed[side].lineInfo(pos.line); jQuery.each(info.bgClass.split(' '), function(i, clazz) { if (clazz.indexOf('cid-') == 0) { cid = parseInt(clazz.split('-')[1], 10); return false; } }); var change = self.changes[cid]; var line = {lhs: ed['lhs'].lineInfo(llt), rhs: ed['rhs'].lineInfo(rlt)}; var text = ed[side].getRange( CodeMirror.Pos(change[side + '-line-from'], 0), CodeMirror.Pos(change[side + '-line-to'] + 1, 0)); if (change['op'] == 'c') { ed[oside].replaceRange(text, CodeMirror.Pos(change[oside + '-line-from'], 0), CodeMirror.Pos(change[oside + '-line-to'] + 1, 0)); } else if (side == 'rhs') { if (change['op'] == 'a') { ed[oside].replaceRange(text, CodeMirror.Pos(change[oside + '-line-from'] + 1, 0), CodeMirror.Pos(change[oside + '-line-to'] + 1, 0)); } else {// 'd' var from = parseInt(change[oside + '-line-from']); var to = parseInt(change[oside + '-line-to']); for (var i = to; i >= from; --i) { ed[oside].removeLine(i); } } } else if (side == 'lhs') { if (change['op'] == 'a') { var from = parseInt(change[oside + '-line-from']); var to = parseInt(change[oside + '-line-to']); for (var i = to; i >= from; --i) { ed[oside].removeLine(i); } } else {// 'd' ed[oside].replaceRange( text, CodeMirror.Pos(change[oside + '-line-from'] + 1, 0)); } } //reset ed['lhs'].setValue(ed['lhs'].getValue()); ed['rhs'].setValue(ed['rhs'].getValue()); return false; }); this.trace('change', 'markup buttons time', timer.stop()); }, _draw_info: function(editor_name1, editor_name2) { var visible_page_height = jQuery(this.editor[editor_name1].getScrollerElement()).height(); var gutter_height = jQuery(this.editor[editor_name1].getScrollerElement()).children(':first-child').height(); var dcanvas = document.getElementById(editor_name1 + '-' + editor_name2 + '-canvas'); if (dcanvas == undefined) throw 'Failed to find: ' + editor_name1 + '-' + editor_name2 + '-canvas'; var clhs = jQuery('#' + this.id + '-lhs-margin'); var crhs = jQuery('#' + this.id + '-rhs-margin'); return { visible_page_height: visible_page_height, gutter_height: gutter_height, visible_page_ratio: (visible_page_height / gutter_height), margin_ratio: (visible_page_height / gutter_height), lhs_scroller: jQuery(this.editor[editor_name1].getScrollerElement()), rhs_scroller: jQuery(this.editor[editor_name2].getScrollerElement()), lhs_lines: this.editor[editor_name1].lineCount(), rhs_lines: this.editor[editor_name2].lineCount(), dcanvas: dcanvas, clhs: clhs, crhs: crhs, lhs_xyoffset: jQuery(clhs).offset(), rhs_xyoffset: jQuery(crhs).offset() }; }, _draw_diff: function(editor_name1, editor_name2, changes) { var ex = this._draw_info(editor_name1, editor_name2); var mcanvas_lhs = ex.clhs.get(0); var mcanvas_rhs = ex.crhs.get(0); var ctx = ex.dcanvas.getContext('2d'); var ctx_lhs = mcanvas_lhs.getContext('2d'); var ctx_rhs = mcanvas_rhs.getContext('2d'); this.trace('draw', 'visible_page_height', ex.visible_page_height); this.trace('draw', 'gutter_height', ex.gutter_height); this.trace('draw', 'visible_page_ratio', ex.visible_page_ratio); this.trace('draw', 'lhs-scroller-top', ex.lhs_scroller.scrollTop()); this.trace('draw', 'rhs-scroller-top', ex.rhs_scroller.scrollTop()); jQuery.each(jQuery.find('#' + this.id + ' canvas'), function () { jQuery(this).get(0).height = ex.visible_page_height; }); ex.clhs.unbind('click'); ex.crhs.unbind('click'); ctx_lhs.beginPath(); ctx_lhs.fillStyle = this.settings.bgcolor; ctx_lhs.strokeStyle = '#888'; ctx_lhs.fillRect(0, 0, 6.5, ex.visible_page_height); ctx_lhs.strokeRect(0, 0, 6.5, ex.visible_page_height); ctx_rhs.beginPath(); ctx_rhs.fillStyle = this.settings.bgcolor; ctx_rhs.strokeStyle = '#888'; ctx_rhs.fillRect(0, 0, 6.5, ex.visible_page_height); ctx_rhs.strokeRect(0, 0, 6.5, ex.visible_page_height); var vp = this._get_viewport(editor_name1, editor_name2); for (var i = 0; i < changes.length; ++i) { var change = changes[i]; this.trace('draw', change); // margin indicators var lhs_y_start = ((change['lhs-y-start'] + ex.lhs_scroller.scrollTop()) * ex.visible_page_ratio); var lhs_y_end = ((change['lhs-y-end'] + ex.lhs_scroller.scrollTop()) * ex.visible_page_ratio) + 1; var rhs_y_start = ((change['rhs-y-start'] + ex.rhs_scroller.scrollTop()) * ex.visible_page_ratio); var rhs_y_end = ((change['rhs-y-end'] + ex.rhs_scroller.scrollTop()) * ex.visible_page_ratio) + 1; this.trace('draw', 'marker calculated', lhs_y_start, lhs_y_end, rhs_y_start, rhs_y_end); ctx_lhs.beginPath(); ctx_lhs.fillStyle = this.settings.fgcolor[change['op']]; ctx_lhs.strokeStyle = '#000'; ctx_lhs.lineWidth = 0.5; ctx_lhs.fillRect(1.5, lhs_y_start, 4.5, Math.max(lhs_y_end - lhs_y_start, 5)); ctx_lhs.strokeRect(1.5, lhs_y_start, 4.5, Math.max(lhs_y_end - lhs_y_start, 5)); ctx_rhs.beginPath(); ctx_rhs.fillStyle = this.settings.fgcolor[change['op']]; ctx_rhs.strokeStyle = '#000'; ctx_rhs.lineWidth = 0.5; ctx_rhs.fillRect(1.5, rhs_y_start, 4.5, Math.max(rhs_y_end - rhs_y_start, 5)); ctx_rhs.strokeRect(1.5, rhs_y_start, 4.5, Math.max(rhs_y_end - rhs_y_start, 5)); if (!this._is_change_in_view(vp, change)) { continue; } lhs_y_start = change['lhs-y-start']; lhs_y_end = change['lhs-y-end']; rhs_y_start = change['rhs-y-start']; rhs_y_end = change['rhs-y-end']; var radius = 3; // draw left box ctx.beginPath(); ctx.strokeStyle = this.settings.fgcolor[change['op']]; ctx.lineWidth = 1; var rectWidth = this.draw_lhs_width; var rectHeight = lhs_y_end - lhs_y_start - 1; var rectX = this.draw_lhs_min; var rectY = lhs_y_start; // top and top top-right corner // draw left box ctx.moveTo(rectX, rectY); if (navigator.appName == 'Microsoft Internet Explorer') { // IE arcs look awful ctx.lineTo(this.draw_lhs_min + this.draw_lhs_width, lhs_y_start); ctx.lineTo(this.draw_lhs_min + this.draw_lhs_width, lhs_y_end + 1); ctx.lineTo(this.draw_lhs_min, lhs_y_end + 1); } else { if (rectHeight <= 0) { ctx.lineTo(rectX + rectWidth, rectY); } else { ctx.arcTo(rectX + rectWidth, rectY, rectX + rectWidth, rectY + radius, radius); ctx.arcTo(rectX + rectWidth, rectY + rectHeight, rectX + rectWidth - radius, rectY + rectHeight, radius); } // bottom line ctx.lineTo(rectX, rectY + rectHeight); } ctx.stroke(); rectWidth = this.draw_rhs_width; rectHeight = rhs_y_end - rhs_y_start - 1; rectX = this.draw_rhs_max; rectY = rhs_y_start; // draw right box ctx.moveTo(rectX, rectY); if (navigator.appName == 'Microsoft Internet Explorer') { ctx.lineTo(this.draw_rhs_max - this.draw_rhs_width, rhs_y_start); ctx.lineTo(this.draw_rhs_max - this.draw_rhs_width, rhs_y_end + 1); ctx.lineTo(this.draw_rhs_max, rhs_y_end + 1); } else { if (rectHeight <= 0) { ctx.lineTo(rectX - rectWidth, rectY); } else { ctx.arcTo(rectX - rectWidth, rectY, rectX - rectWidth, rectY + radius, radius); ctx.arcTo(rectX - rectWidth, rectY + rectHeight, rectX - radius, rectY + rectHeight, radius); } ctx.lineTo(rectX, rectY + rectHeight); } ctx.stroke(); // connect boxes var cx = this.draw_lhs_min + this.draw_lhs_width; var cy = lhs_y_start + (lhs_y_end + 1 - lhs_y_start) / 2.0; var dx = this.draw_rhs_max - this.draw_rhs_width; var dy = rhs_y_start + (rhs_y_end + 1 - rhs_y_start) / 2.0; ctx.moveTo(cx, cy); if (cy == dy) { ctx.lineTo(dx, dy); } else { // fancy! ctx.bezierCurveTo( cx + 12, cy - 3, // control-1 X,Y dx - 12, dy - 3, // control-2 X,Y dx, dy); } ctx.stroke(); } // visible window feedback ctx_lhs.fillStyle = this.settings.vpcolor; ctx_rhs.fillStyle = this.settings.vpcolor; var lto = ex.clhs.height() * ex.visible_page_ratio; var lfrom = (ex.lhs_scroller.scrollTop() / ex.gutter_height) * ex.clhs.height(); var rto = ex.crhs.height() * ex.visible_page_ratio; var rfrom = (ex.rhs_scroller.scrollTop() / ex.gutter_height) * ex.crhs.height(); this.trace('draw', 'cls.height', ex.clhs.height()); this.trace('draw', 'lhs_scroller.scrollTop()', ex.lhs_scroller.scrollTop()); this.trace('draw', 'gutter_height', ex.gutter_height); this.trace('draw', 'visible_page_ratio', ex.visible_page_ratio); this.trace('draw', 'lhs from', lfrom, 'lhs to', lto); this.trace('draw', 'rhs from', rfrom, 'rhs to', rto); ctx_lhs.fillRect(1.5, lfrom, 4.5, lto); ctx_rhs.fillRect(1.5, rfrom, 4.5, rto); ex.clhs.click(function (ev) { var y = ev.pageY - ex.lhs_xyoffset.top - (lto / 2); var sto = Math.max(0, (y / mcanvas_lhs.height) * ex.lhs_scroller.get(0).scrollHeight); ex.lhs_scroller.scrollTop(sto); }); ex.crhs.click(function (ev) { var y = ev.pageY - ex.rhs_xyoffset.top - (rto / 2); var sto = Math.max(0, (y / mcanvas_rhs.height) * ex.rhs_scroller.get(0).scrollHeight); ex.rhs_scroller.scrollTop(sto); }); }, trace: function(name) { if(this.settings._debug.indexOf(name) >= 0) { arguments[0] = name+':'; console.log([].slice.apply(arguments)); } } }); jQuery.pluginMaker = function(plugin) { // add the plugin function as a jQuery plugin jQuery.fn[plugin.prototype.name] = function(options) { // get the arguments var args = jQuery.makeArray(arguments), after = args.slice(1); var rc = undefined; this.each(function() { // see if we have an instance var instance = jQuery.data(this, plugin.prototype.name); if (instance) { // call a method on the instance if (typeof options == "string") { rc = instance[options].apply(instance, after); } else if (instance.update) { // call update on the instance return instance.update.apply(instance, args); } } else { // create the plugin new plugin(this, options); } }); if (rc != undefined) return rc; }; }; // make the mergely widget jQuery.pluginMaker(Mgly.mergely);