src/editor/modules/documentHistory/documentHistory.js

   1 define([
   2 'libs/jquery',
   3 'libs/underscore',
   4 './restoreDialog',
   5 'libs/text!./templates/main.html',
   6 'libs/text!./templates/item.html'
   7 ], function($, _, restoreDialog, mainTemplateSrc, itemTemplateSrc) {
   8
   9 'use strict';
  10
  11 return function(sandbox) {
  12
  13     var dom = $(_.template(mainTemplateSrc)());
  14     var domNodes = {
  15         itemList: dom.find('.rng-module-documentHistory-itemsList'),
  16     };
  17     var itemViews = [];
  18
  19
  20     dom.find('.btn.compare').click(function() {
  21         var selected = historyItems.getSelected();
  22         sandbox.publish('compare', selected[0], selected[1]);
  23     });
  24
  25     dom.find('.btn.restore').click(function() {
  26         var dialog = restoreDialog.create();
  27         dialog.on('restore', function(event) {
  28             sandbox.publish('restoreVersion', {version: historyItems.getSelected()[0], description: event.data.description});
  29             event.success();
  30         });
  31         dialog.show();
  32     });
  33
  34     dom.find('.btn.display').click(function() {
  35         sandbox.publish('displayVersion', {version: historyItems.getSelected()[0]});
  36     });
  37
  38     var addHistoryItem = function(item, options) {
  39         historyItems.add(item);
  40         var view = new ItemView(item);
  41         itemViews.push(view);
  42         domNodes.itemList.prepend(view.dom);
  43         if(options.animate) {
  44             view.dom.hide().slideDown();
  45         }
  46     };
  47
  48     var toggleItemViews = function(toggle) {
  49         itemViews.forEach(function(view) {
  50             if(!historyItems.isSelected(view.item)) {
  51                 view.toggle(toggle);
  52             }
  53         });
  54     };
  55
  56     var toggleButton = function(btn, toggle) {
  57         dom.find('button.'+btn).toggleClass('disabled', !toggle);
  58     };
  59
  60     var historyItems = {
  61         _itemsById: {},
  62         _selected: [],
  63         select: function(item) {
  64             if(this._selected.length < 2) {
  65                 this._selected.push(item.version);
  66                 this._updateUI();
  67                 return true;
  68             }
  69             return false;
  70         },
  71         unselect: function(item) {
  72             this._selected = _.without(this._selected, item.version);
  73             this._updateUI();
  74         },
  75         add: function(item) {
  76             this._itemsById[item.version] = item;
  77         },
  78         isSelected: function(item) {
  79             return _.contains(this._selected, item.version);
  80         },
  81         getSelected: function() {
  82             return this._selected;
  83         },
  84         _updateUI: function() {
  85             var len = this._selected.length;
  86             if(len === 0) {
  87                 toggleButton('compare', false);
  88                 toggleButton('display', false);
  89                 toggleButton('restore', false);
  90             }
  91             if(len === 1) {
  92                 toggleButton('compare', false);
  93                 toggleButton('display', true);
  94                 toggleButton('restore', true);
  95             }
  96             if(len === 2) {
  97                 toggleItemViews(false);
  98                 toggleButton('compare', true);
  99                 toggleButton('display', false);
 100                 toggleButton('restore', false);
 101             } else {
 102                 toggleItemViews(true);
 103             }
 104         }
 105     };
 106     historyItems._updateUI();
 107
 108     var ItemView = function(item) {
 109         this.item = item;
 110         this.dom = $(this.template(item));
 111         this.dom.on('click', _.bind(this.onItemClicked, this));
 112     };
 113     ItemView.prototype.template = _.template(itemTemplateSrc);
 114     ItemView.prototype.onItemClicked = function() {
 115         if(historyItems.isSelected(this.item)) {
 116             historyItems.unselect(this.item);
 117             this.dimItem();
 118         } else if(historyItems.select(this.item)) {
 119             this.highlightItem();
 120         }
 121     };
 122     ItemView.prototype.highlightItem = function() {
 123         this.dom.addClass('highlighted');
 124     };
 125     ItemView.prototype.dimItem = function() {
 126         this.dom.removeClass('highlighted');
 127     };
 128     ItemView.prototype.toggle = function(toggle) {
 129         this.dom.toggleClass('disabled', !toggle);
 130     };
 131
 132
 133
 134     return {
 135         start: function() { sandbox.publish('ready'); },
 136         addHistory: function(history, options) {
 137             history.forEach(function(historyItem) {
 138                 addHistoryItem(historyItem, options || {});
 139             });
 140         },
 141         getView: function() {
 142             return dom;
 143         }
 144     };
 145 };
 146
 147 });