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