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