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