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 toret = $('<div>')
  26                     .attr('wlxml-tag', currentTag.prop('tagName').toLowerCase());
  27                 //toret.attr('id', 'xxxxxxxx-xxxx-xxxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {var r = Math.random()*16|0,v=c=='x'?r:r&0x3|0x8;return v.toString(16);}));
  28                 for(var i = 0; i < this.attributes.length; i++) {
  29                     var attr = this.attributes.item(i);
  30                     var value = attr.name === 'class' ? attr.value.replace(/\./g, '-') : attr.value;
  31                     toret.attr('wlxml-' + attr.name, value);
  32                 }
  33                 toret.append(currentTag.contents());
  34                 return toret;
  35             });
  36
  37             wrapper.find(':not(iframe)').addBack().contents()
  38                 .filter(function() {return this.nodeType === Node.TEXT_NODE})
  39                 .each(function() {
  40
  41                     var el = $(this);
  42
  43                     // TODO: use DocumentElement API
  44                     var spanParent = el.parent().attr('wlxml-tag') === 'span',
  45                         spanBefore = el.prev().length > 0  && $(el.prev()[0]).attr('wlxml-tag') === 'span',
  46                         spanAfter = el.next().length > 0 && $(el.next()[0]).attr('wlxml-tag') === 'span';
  47
  48                     if(spanParent || spanBefore || spanAfter) {
  49                         var startSpace = /\s/g.test(this.data.substr(0,1));
  50                         var endSpace = /\s/g.test(this.data.substr(-1)) && this.data.length > 1;
  51                         var trimmed = $.trim(this.data);
  52                         this.data = (startSpace && (spanParent || spanBefore) ? ' ' : '')
  53                                     + trimmed
  54                                     + (endSpace && (spanParent || spanAfter) ? ' ' : '');
  55
  56                     } else {
  57                         var oldLength = this.data.length;
  58                         this.data = $.trim(this.data);
  59                         if(this.data.length === 0 && oldLength > 0 && el.parent().contents().length === 1)
  60                             this.data = ' ';
  61                         if(this.data.length === 0) {
  62                             $(this).remove();
  63                             return true; // continue
  64                         }
  65                     }
  66
  67                     var wrapper = documentElement.DocumentTextElement.create({text: this.data});
  68                     $(this).before(wrapper.dom());
  69                     $(this).remove();
  70                 });
  71
  72             this.d = wrapper.children(0);
  73             this.d.unwrap();
  74         } else {
  75             this.d = null;
  76         }
  77     },
  78
  79     doc: function() {
  80         if(this.d === null)
  81             return null;
  82         return documentElement.DocumentNodeElement.fromHTMLElement(this.d.get(0), this); //{wlxmlTag: this.d.prop('tagName')};
  83     },
  84
  85     wrapText: function(params) {
  86         params = _.extend({textNodeIdx: 0}, params);
  87         if(typeof params.textNodeIdx === 'number')
  88             params.textNodeIdx = [params.textNodeIdx];
  89
  90         var childrenInside = params.inside.children(),
  91             idx1 = Math.min.apply(Math, params.textNodeIdx),
  92             idx2 = Math.max.apply(Math, params.textNodeIdx),
  93             textNode1 = childrenInside[idx1],
  94             textNode2 = childrenInside[idx2],
  95             sameNode = textNode1.sameNode(textNode2),
  96             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
  97             prefixInside = textNode1.getText().substr(params.offsetStart),
  98             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
  99             suffixOutside = textNode2.getText().substr(params.offsetEnd)
 100         ;
 101
 102         var wrapperElement = documentElement.DocumentNodeElement.create({tag: params._with.tag, klass: params._with.klass});
 103         textNode1.after(wrapperElement);
 104         textNode1.detach();
 105
 106         if(prefixOutside.length > 0)
 107             wrapperElement.before({text:prefixOutside});
 108         if(sameNode) {
 109             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 110             wrapperElement.append({text: core});
 111         } else {
 112             textNode2.detach();
 113             if(prefixInside.length > 0)
 114                 wrapperElement.append({text: prefixInside});
 115             for(var i = idx1 + 1; i < idx2; i++) {
 116                 wrapperElement.append(childrenInside[i]);
 117             }
 118             if(suffixInside.length > 0)
 119                 wrapperElement.append({text: suffixInside});
 120         }
 121         if(suffixOutside.length > 0)
 122             wrapperElement.after({text: suffixOutside});
 123         return wrapperElement;
 124     },
 125     getDocumentElement: function(from) {
 126         if(from instanceof HTMLElement || from instanceof Text) {
 127            return documentElement.DocumentElement.fromHTMLElement(from, this);
 128         }
 129     },
 130     getCursor: function() {
 131         return new Cursor(this);
 132     },
 133
 134     list: {},
 135
 136 });
 137
 138 $.extend(Canvas.prototype.list, {
 139     create: function(params) {
 140         if(!(params.element1.parent().sameNode(params.element2.parent())))
 141             return false;
 142
 143         var parent = params.element1.parent();
 144
 145         if(parent.childIndex(params.element1) > parent.childIndex(params.element2)) {
 146             var tmp = params.element1;
 147             params.element1 = params.element2;
 148             params.element2 = tmp;
 149         }
 150
 151         var elementsToWrap = [];
 152
 153         var place = 'before';
 154         var canvas = this;
 155         parent.children().some(function(element) {
 156             var _e = element;
 157             if(element.sameNode(params.element1))
 158                 place = 'inside';
 159             if(place === 'inside') {
 160                 if(element instanceof documentElement.DocumentTextElement) {
 161                     element = element.wrapWithNodeElement({tag: 'div', klass: 'list.item'});
 162                     if(element.children()[0].sameNode(params.element1))
 163                         params.element1 = element;
 164                 }
 165                 element.setWlxmlClass('item');
 166                 elementsToWrap.push(element);
 167             }
 168             if(_e.sameNode(params.element2))
 169                 return true;
 170         });
 171
 172         var listElement = documentElement.DocumentNodeElement.create({tag: 'div', klass: 'list-items' + (params.type === 'enum' ? '-enum' : '')});
 173
 174         var toret;
 175         if(parent.is('list')) {
 176             listElement.wrapWithNodeElement({tag: 'div', klass: 'item'});
 177             toret = listElement.parent();
 178         } else {
 179             toret = listElement;
 180         }
 181
 182         params.element1.before(toret);
 183
 184         elementsToWrap.forEach(function(element) {
 185             element.detach();
 186             listElement.append(element);
 187         });
 188     },
 189     extractItems: function(params) {
 190         params = _.extend({merge: true}, params);
 191         var list = params.element1.parent();
 192         if(!list.is('list') || !(list.sameNode(params.element2.parent())))
 193             return false;
 194
 195         var idx1 = list.childIndex(params.element1),
 196             idx2 = list.childIndex(params.element2),
 197             precedingItems = [],
 198             extractedItems = [],
 199             succeedingItems = [],
 200             items = list.children(),
 201             listIsNested = list.parent().getWlxmlClass() === 'item',
 202             i;
 203
 204         if(idx1 > idx2) {
 205             var tmp = idx1; idx1 = idx2; idx2 = tmp;
 206         }
 207
 208         items.forEach(function(item, idx) {
 209             if(idx < idx1)
 210                 precedingItems.push(item);
 211             else if(idx >= idx1 && idx <= idx2) {
 212                 extractedItems.push(item);
 213             }
 214             else {
 215                 succeedingItems.push(item);
 216             }
 217         });
 218
 219         var reference = listIsNested ? list.parent() : list;
 220         if(succeedingItems.length === 0) {
 221             var reference_orig = reference;
 222             extractedItems.forEach(function(item) {
 223                 reference.after(item);
 224                 reference = item;
 225                 if(!listIsNested)
 226                     item.setWlxmlClass(null);
 227             });
 228             if(precedingItems.length === 0)
 229                 reference_orig.detach();
 230         } else if(precedingItems.length === 0) {
 231             extractedItems.forEach(function(item) {
 232                 reference.before(item);
 233                 if(!listIsNested)
 234                     item.setWlxmlClass(null);
 235             });
 236         } else {
 237             extractedItems.forEach(function(item) {
 238                 reference.after(item);
 239                 if(!listIsNested)
 240                     item.setWlxmlClass(null);
 241                 reference = item;
 242             });
 243             var secondList = documentElement.DocumentNodeElement.create({tag: 'div', klass:'list-items'}, this),
 244                 toAdd = secondList;
 245
 246             if(listIsNested) {
 247                 toAdd = secondList.wrapWithNodeElement({tag: 'div', klass:'item'});
 248             }
 249             succeedingItems.forEach(function(item) {
 250                 secondList.append(item);
 251             });
 252
 253             reference.after(toAdd);
 254         }
 255         if(!params.merge && listIsNested) {
 256             return this.extractItems({element1: extractedItems[0], element2: extractedItems[extractedItems.length-1]});
 257         }
 258         return true;
 259     },
 260     areItemsOfTheSameList: function(params) {
 261         var e1 = params.element1,
 262             e2 = params.element2;
 263         return e1.parent().sameNode(e2.parent())
 264             && e1.parent().is('list');
 265     }
 266 });
 267
 268
 269 var Cursor = function(canvas) {
 270     this.canvas = canvas;
 271 };
 272
 273 $.extend(Cursor.prototype, {
 274     isSelecting: function() {
 275         var selection = window.getSelection();
 276         return !selection.isCollapsed;
 277     },
 278     isSelectingWithinElement: function() {
 279         return this.isSelecting() && this.getSelectionStart().element.sameNode(this.getSelectionEnd().element);
 280     },
 281     isSelectingSiblings: function() {
 282         return this.isSelecting() && this.getSelectionStart().element.parent().sameNode(this.getSelectionEnd().element.parent());
 283     },
 284     getPosition: function() {
 285         return this.getSelectionAnchor();
 286     },
 287     getSelectionStart: function() {
 288         return this.getSelectionBoundry('start');
 289     },
 290     getSelectionEnd: function() {
 291         return this.getSelectionBoundry('end');
 292     },
 293     getSelectionAnchor: function() {
 294         return this.getSelectionBoundry('anchor');
 295     },
 296     getSelectionBoundry: function(which) {
 297         var selection = window.getSelection(),
 298             anchorElement = this.canvas.getDocumentElement(selection.anchorNode),
 299             focusElement = this.canvas.getDocumentElement(selection.focusNode);
 300
 301         if(which === 'anchor') {
 302             return {
 303                 element: anchorElement,
 304                 offset: selection.anchorOffset
 305             };
 306         }
 307
 308         var element,
 309             offset;
 310
 311         if(anchorElement.parent().sameNode(focusElement.parent())) {
 312             var parent = anchorElement.parent(),
 313                 anchorFirst = parent.childIndex(anchorElement) < parent.childIndex(focusElement);
 314             if(anchorFirst) {
 315                 if(which === 'start') {
 316                     element = anchorElement;
 317                     offset = selection.anchorOffset;
 318                 }
 319                 else if(which === 'end') {
 320                     element = focusElement,
 321                     offset = selection.focusOffset;
 322                 }
 323             } else {
 324                 if(which === 'start') {
 325                     element = focusElement,
 326                     offset = selection.focusOffset
 327                 }
 328                 else if(which === 'end') {
 329                     element = anchorElement;
 330                     offset = selection.anchorOffset;
 331                 }
 332             }
 333         } else {
 334             // TODO: Handle order
 335             if(which === 'start') {
 336                 element = anchorElement;
 337                 offset = selection.anchorOffset
 338             } else {
 339                 element = focusElement;
 340                 offset = selection.focusOffset
 341             }
 342         }
 343
 344         return {
 345             element: element,
 346             offset: offset
 347         }
 348     }
 349 })
 350
 351 return {
 352     fromXML: function(xml) {
 353         return new Canvas(xml);
 354     }
 355 };
 356
 357 });