modules/documentCanvas/canvas/canvas.js

   1 define([
   2 'libs/jquery-1.9.1.min',
   3 'libs/underscore-min',
   4 'modules/documentCanvas/canvas/documentElement'
   5 ], function($, _, documentElement) {
   6
   7 'use strict';
   8
   9 var Canvas = function(wlxml) {
  10     this.loadWlxml(wlxml);
  11 };
  12
  13 $.extend(Canvas.prototype, {
  14
  15     loadWlxml: function(wlxml) {
  16         var d = wlxml ? $($.trim(wlxml)) : null;
  17         if(d) {
  18             this.wrapper = $('<div>').addClass('canvas-wrapper').attr('contenteditable', true);
  19             this.wrapper.append(d);
  20
  21             this.wrapper.find('*').replaceWith(function() {
  22                 var currentTag = $(this);
  23                 if(currentTag.attr('wlxml-tag'))
  24                     return;
  25                 var element = documentElement.DocumentNodeElement.createDOM({
  26                     tag: currentTag.prop('tagName').toLowerCase(),
  27                     klass: currentTag.attr('class')
  28                 });
  29
  30                 element.append(currentTag.contents());
  31                 return element;
  32             });
  33
  34             this.wrapper.find(':not(iframe)').addBack().contents()
  35                 .filter(function() {return this.nodeType === Node.TEXT_NODE})
  36                 .each(function() {
  37
  38                     var el = $(this);
  39
  40                     // TODO: use DocumentElement API
  41                     var spanParent = el.parent().attr('wlxml-tag') === 'span',
  42                         spanBefore = el.prev().length > 0  && $(el.prev()[0]).attr('wlxml-tag') === 'span',
  43                         spanAfter = el.next().length > 0 && $(el.next()[0]).attr('wlxml-tag') === 'span';
  44
  45                     if(spanParent || spanBefore || spanAfter) {
  46                         var startSpace = /\s/g.test(this.data.substr(0,1));
  47                         var endSpace = /\s/g.test(this.data.substr(-1)) && this.data.length > 1;
  48                         var trimmed = $.trim(this.data);
  49                         this.data = (startSpace && (spanParent || spanBefore) ? ' ' : '')
  50                                     + trimmed
  51                                     + (endSpace && (spanParent || spanAfter) ? ' ' : '');
  52
  53                     } else {
  54                         var oldLength = this.data.length;
  55                         this.data = $.trim(this.data);
  56                         if(this.data.length === 0 && oldLength > 0 && el.parent().contents().length === 1)
  57                             this.data = ' ';
  58                         if(this.data.length === 0) {
  59                             $(this).remove();
  60                             return true; // continue
  61                         }
  62                     }
  63
  64                     var element = documentElement.DocumentTextElement.create({text: this.data});
  65                     $(this).replaceWith(element.dom());
  66                 });
  67
  68             this.d = this.wrapper.children(0);
  69         } else {
  70             this.d = null;
  71         }
  72     },
  73
  74     view: function() {
  75         return this.wrapper;
  76     },
  77
  78     doc: function() {
  79         if(this.d === null)
  80             return null;
  81         return documentElement.DocumentNodeElement.fromHTMLElement(this.d.get(0), this); //{wlxmlTag: this.d.prop('tagName')};
  82     },
  83
  84     wrapText: function(params) {
  85         params = _.extend({textNodeIdx: 0}, params);
  86         if(typeof params.textNodeIdx === 'number')
  87             params.textNodeIdx = [params.textNodeIdx];
  88
  89         var childrenInside = params.inside.children(),
  90             idx1 = Math.min.apply(Math, params.textNodeIdx),
  91             idx2 = Math.max.apply(Math, params.textNodeIdx),
  92             textNode1 = childrenInside[idx1],
  93             textNode2 = childrenInside[idx2],
  94             sameNode = textNode1.sameNode(textNode2),
  95             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
  96             prefixInside = textNode1.getText().substr(params.offsetStart),
  97             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
  98             suffixOutside = textNode2.getText().substr(params.offsetEnd)
  99         ;
 100
 101         var wrapperElement = documentElement.DocumentNodeElement.create({tag: params._with.tag, klass: params._with.klass});
 102         textNode1.after(wrapperElement);
 103         textNode1.detach();
 104
 105         if(prefixOutside.length > 0)
 106             wrapperElement.before({text:prefixOutside});
 107         if(sameNode) {
 108             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 109             wrapperElement.append({text: core});
 110         } else {
 111             textNode2.detach();
 112             if(prefixInside.length > 0)
 113                 wrapperElement.append({text: prefixInside});
 114             for(var i = idx1 + 1; i < idx2; i++) {
 115                 wrapperElement.append(childrenInside[i]);
 116             }
 117             if(suffixInside.length > 0)
 118                 wrapperElement.append({text: suffixInside});
 119         }
 120         if(suffixOutside.length > 0)
 121             wrapperElement.after({text: suffixOutside});
 122         return wrapperElement;
 123     },
 124     getDocumentElement: function(from) {
 125         if(from instanceof HTMLElement || from instanceof Text) {
 126            return documentElement.DocumentElement.fromHTMLElement(from, this);
 127         }
 128     },
 129     getCursor: function() {
 130         return new Cursor(this);
 131     },
 132
 133     list: {},
 134
 135 });
 136
 137 $.extend(Canvas.prototype.list, {
 138     create: function(params) {
 139         if(!(params.element1.parent().sameNode(params.element2.parent())))
 140             return false;
 141
 142         var parent = params.element1.parent();
 143
 144         if(parent.childIndex(params.element1) > parent.childIndex(params.element2)) {
 145             var tmp = params.element1;
 146             params.element1 = params.element2;
 147             params.element2 = tmp;
 148         }
 149
 150         var elementsToWrap = [];
 151
 152         var place = 'before';
 153         var canvas = this;
 154         parent.children().some(function(element) {
 155             var _e = element;
 156             if(element.sameNode(params.element1))
 157                 place = 'inside';
 158             if(place === 'inside') {
 159                 if(element instanceof documentElement.DocumentTextElement) {
 160                     element = element.wrapWithNodeElement({tag: 'div', klass: 'list.item'});
 161                     if(element.children()[0].sameNode(params.element1))
 162                         params.element1 = element;
 163                 }
 164                 element.setWlxmlClass('item');
 165                 elementsToWrap.push(element);
 166             }
 167             if(_e.sameNode(params.element2))
 168                 return true;
 169         });
 170
 171         var listElement = documentElement.DocumentNodeElement.create({tag: 'div', klass: 'list-items' + (params.type === 'enum' ? '-enum' : '')});
 172
 173         var toret;
 174         if(parent.is('list')) {
 175             listElement.wrapWithNodeElement({tag: 'div', klass: 'item'});
 176             toret = listElement.parent();
 177         } else {
 178             toret = listElement;
 179         }
 180
 181         params.element1.before(toret);
 182
 183         elementsToWrap.forEach(function(element) {
 184             element.detach();
 185             listElement.append(element);
 186         });
 187     },
 188     extractItems: function(params) {
 189         params = _.extend({merge: true}, params);
 190         var list = params.element1.parent();
 191         if(!list.is('list') || !(list.sameNode(params.element2.parent())))
 192             return false;
 193
 194         var idx1 = list.childIndex(params.element1),
 195             idx2 = list.childIndex(params.element2),
 196             precedingItems = [],
 197             extractedItems = [],
 198             succeedingItems = [],
 199             items = list.children(),
 200             listIsNested = list.parent().getWlxmlClass() === 'item',
 201             i;
 202
 203         if(idx1 > idx2) {
 204             var tmp = idx1; idx1 = idx2; idx2 = tmp;
 205         }
 206
 207         items.forEach(function(item, idx) {
 208             if(idx < idx1)
 209                 precedingItems.push(item);
 210             else if(idx >= idx1 && idx <= idx2) {
 211                 extractedItems.push(item);
 212             }
 213             else {
 214                 succeedingItems.push(item);
 215             }
 216         });
 217
 218         var reference = listIsNested ? list.parent() : list;
 219         if(succeedingItems.length === 0) {
 220             var reference_orig = reference;
 221             extractedItems.forEach(function(item) {
 222                 reference.after(item);
 223                 reference = item;
 224                 if(!listIsNested)
 225                     item.setWlxmlClass(null);
 226             });
 227             if(precedingItems.length === 0)
 228                 reference_orig.detach();
 229         } else if(precedingItems.length === 0) {
 230             extractedItems.forEach(function(item) {
 231                 reference.before(item);
 232                 if(!listIsNested)
 233                     item.setWlxmlClass(null);
 234             });
 235         } else {
 236             extractedItems.forEach(function(item) {
 237                 reference.after(item);
 238                 if(!listIsNested)
 239                     item.setWlxmlClass(null);
 240                 reference = item;
 241             });
 242             var secondList = documentElement.DocumentNodeElement.create({tag: 'div', klass:'list-items'}, this),
 243                 toAdd = secondList;
 244
 245             if(listIsNested) {
 246                 toAdd = secondList.wrapWithNodeElement({tag: 'div', klass:'item'});
 247             }
 248             succeedingItems.forEach(function(item) {
 249                 secondList.append(item);
 250             });
 251
 252             reference.after(toAdd);
 253         }
 254         if(!params.merge && listIsNested) {
 255             return this.extractItems({element1: extractedItems[0], element2: extractedItems[extractedItems.length-1]});
 256         }
 257         return true;
 258     },
 259     areItemsOfTheSameList: function(params) {
 260         var e1 = params.element1,
 261             e2 = params.element2;
 262         return e1.parent().sameNode(e2.parent())
 263             && e1.parent().is('list');
 264     }
 265 });
 266
 267
 268 var Cursor = function(canvas) {
 269     this.canvas = canvas;
 270 };
 271
 272 $.extend(Cursor.prototype, {
 273     isSelecting: function() {
 274         var selection = window.getSelection();
 275         return !selection.isCollapsed;
 276     },
 277     isSelectingWithinElement: function() {
 278         return this.isSelecting() && this.getSelectionStart().element.sameNode(this.getSelectionEnd().element);
 279     },
 280     isSelectingSiblings: function() {
 281         return this.isSelecting() && this.getSelectionStart().element.parent().sameNode(this.getSelectionEnd().element.parent());
 282     },
 283     getPosition: function() {
 284         return this.getSelectionAnchor();
 285     },
 286     getSelectionStart: function() {
 287         return this.getSelectionBoundry('start');
 288     },
 289     getSelectionEnd: function() {
 290         return this.getSelectionBoundry('end');
 291     },
 292     getSelectionAnchor: function() {
 293         return this.getSelectionBoundry('anchor');
 294     },
 295     getSelectionBoundry: function(which) {
 296         var selection = window.getSelection(),
 297             anchorElement = this.canvas.getDocumentElement(selection.anchorNode),
 298             focusElement = this.canvas.getDocumentElement(selection.focusNode);
 299
 300         if(which === 'anchor') {
 301             return {
 302                 element: anchorElement,
 303                 offset: selection.anchorOffset
 304             };
 305         }
 306
 307         var element,
 308             offset;
 309
 310         if(anchorElement.parent().sameNode(focusElement.parent())) {
 311             var parent = anchorElement.parent(),
 312                 anchorFirst = parent.childIndex(anchorElement) < parent.childIndex(focusElement);
 313             if(anchorFirst) {
 314                 if(which === 'start') {
 315                     element = anchorElement;
 316                     offset = selection.anchorOffset;
 317                 }
 318                 else if(which === 'end') {
 319                     element = focusElement,
 320                     offset = selection.focusOffset;
 321                 }
 322             } else {
 323                 if(which === 'start') {
 324                     element = focusElement,
 325                     offset = selection.focusOffset
 326                 }
 327                 else if(which === 'end') {
 328                     element = anchorElement;
 329                     offset = selection.anchorOffset;
 330                 }
 331             }
 332         } else {
 333             // TODO: Handle order
 334             if(which === 'start') {
 335                 element = anchorElement;
 336                 offset = selection.anchorOffset
 337             } else {
 338                 element = focusElement;
 339                 offset = selection.focusOffset
 340             }
 341         }
 342
 343         return {
 344             element: element,
 345             offset: offset
 346         }
 347     }
 348 })
 349
 350 return {
 351     fromXML: function(xml) {
 352         return new Canvas(xml);
 353     }
 354 };
 355
 356 });