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, publisher) {
  10     this.loadWlxml(wlxml);
  11     this.publisher = publisher ? publisher : function() {};
  12 };
  13
  14 $.extend(Canvas.prototype, {
  15
  16     loadWlxml: function(wlxml) {
  17         var d = wlxml ? $($.trim(wlxml)) : null;
  18         if(d) {
  19             this.wrapper = $('<div>').addClass('canvas-wrapper').attr('contenteditable', true);
  20             this.wrapper.append(d);
  21
  22             this.wrapper.find('*').replaceWith(function() {
  23                 var currentTag = $(this);
  24                 if(currentTag.attr('wlxml-tag'))
  25                     return;
  26                 var element = documentElement.DocumentNodeElement.createDOM({
  27                     tag: currentTag.prop('tagName').toLowerCase(),
  28                     klass: currentTag.attr('class')
  29                 });
  30
  31                 element.append(currentTag.contents());
  32                 return element;
  33             });
  34
  35             this.wrapper.find(':not(iframe)').addBack().contents()
  36                 .filter(function() {return this.nodeType === Node.TEXT_NODE})
  37                 .each(function() {
  38
  39                     var el = $(this);
  40
  41                     // TODO: use DocumentElement API
  42                     var spanParent = el.parent().attr('wlxml-tag') === 'span',
  43                         spanBefore = el.prev().length > 0  && $(el.prev()[0]).attr('wlxml-tag') === 'span',
  44                         spanAfter = el.next().length > 0 && $(el.next()[0]).attr('wlxml-tag') === 'span';
  45
  46                     if(spanParent || spanBefore || spanAfter) {
  47                         var startSpace = /\s/g.test(this.data.substr(0,1));
  48                         var endSpace = /\s/g.test(this.data.substr(-1)) && this.data.length > 1;
  49                         var trimmed = $.trim(this.data);
  50                         this.data = (startSpace && (spanParent || spanBefore) ? ' ' : '')
  51                                     + trimmed
  52                                     + (endSpace && (spanParent || spanAfter) ? ' ' : '');
  53
  54                     } else {
  55                         var oldLength = this.data.length;
  56                         this.data = $.trim(this.data);
  57                         if(this.data.length === 0 && oldLength > 0 && el.parent().contents().length === 1)
  58                             this.data = ' ';
  59                         if(this.data.length === 0) {
  60                             $(this).remove();
  61                             return true; // continue
  62                         }
  63                     }
  64
  65                     var element = documentElement.DocumentTextElement.create({text: this.data});
  66                     $(this).replaceWith(element.dom());
  67                 });
  68
  69             this.d = this.wrapper.children(0);
  70
  71             var canvas = this;
  72             this.wrapper.on('keydown', function(e) {
  73                 if(e.which === 13) {
  74                     e.preventDefault();
  75                     var cursor = canvas.getCursor();
  76                     if(!cursor.isSelecting()) {
  77                         var position = cursor.getPosition(),
  78                             elements = position.element.split({offset: position.offset}),
  79                             newEmpty,
  80                             goto;
  81
  82                         if(position.offsetAtBeginning)
  83                             newEmpty = elements.first;
  84                         else if(position.offsetAtEnd)
  85                             newEmpty = elements.second;
  86                         if(newEmpty) {
  87                             goto = newEmpty.append(documentElement.DocumentTextElement.create({text: '\u200B'}, this));
  88                             canvas.setCurrentElement(goto);
  89                         }
  90                     }
  91                 }
  92             });
  93
  94             this.wrapper.on('keyup', function(e) {
  95                 if(e.which >= 37 && e.which <= 40)
  96                     canvas.setCurrentElement(canvas.getCursor().getPosition().element, {caretTo: false})
  97             });
  98
  99             this.wrapper.on('click', '[wlxml-tag], [wlxml-text]', function(e) {
 100                 e.stopPropagation();
 101                 canvas.setCurrentElement(canvas.getDocumentElement(e.target), {caretTo: false});
 102             });
 103
 104         } else {
 105             this.d = null;
 106         }
 107     },
 108
 109     view: function() {
 110         return this.wrapper;
 111     },
 112
 113     doc: function() {
 114         if(this.d === null)
 115             return null;
 116         return documentElement.DocumentNodeElement.fromHTMLElement(this.d.get(0), this); //{wlxmlTag: this.d.prop('tagName')};
 117     },
 118
 119     wrapText: function(params) {
 120         params = _.extend({textNodeIdx: 0}, params);
 121         if(typeof params.textNodeIdx === 'number')
 122             params.textNodeIdx = [params.textNodeIdx];
 123
 124         var childrenInside = params.inside.children(),
 125             idx1 = Math.min.apply(Math, params.textNodeIdx),
 126             idx2 = Math.max.apply(Math, params.textNodeIdx),
 127             textNode1 = childrenInside[idx1],
 128             textNode2 = childrenInside[idx2],
 129             sameNode = textNode1.sameNode(textNode2),
 130             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
 131             prefixInside = textNode1.getText().substr(params.offsetStart),
 132             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
 133             suffixOutside = textNode2.getText().substr(params.offsetEnd)
 134         ;
 135
 136         var wrapperElement = documentElement.DocumentNodeElement.create({tag: params._with.tag, klass: params._with.klass});
 137         textNode1.after(wrapperElement);
 138         textNode1.detach();
 139
 140         if(prefixOutside.length > 0)
 141             wrapperElement.before({text:prefixOutside});
 142         if(sameNode) {
 143             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 144             wrapperElement.append({text: core});
 145         } else {
 146             textNode2.detach();
 147             if(prefixInside.length > 0)
 148                 wrapperElement.append({text: prefixInside});
 149             for(var i = idx1 + 1; i < idx2; i++) {
 150                 wrapperElement.append(childrenInside[i]);
 151             }
 152             if(suffixInside.length > 0)
 153                 wrapperElement.append({text: suffixInside});
 154         }
 155         if(suffixOutside.length > 0)
 156             wrapperElement.after({text: suffixOutside});
 157         return wrapperElement;
 158     },
 159     getDocumentElement: function(from) {
 160         if(from instanceof HTMLElement || from instanceof Text) {
 161            return documentElement.DocumentElement.fromHTMLElement(from, this);
 162         }
 163     },
 164     getCursor: function() {
 165         return new Cursor(this);
 166     },
 167
 168     list: {},
 169
 170
 171
 172     highlightElement: function(element) {
 173         this.wrapper.find('.highlighted-element').removeClass('highlighted-element');
 174         element.dom().addClass('highlighted-element');
 175     },
 176
 177     dimElement: function(element) {
 178         element.dom().removeClass('highlighted-element');
 179     },
 180
 181     getCurrentNodeElement: function() {
 182         return this.getDocumentElement(this.wrapper.find('.current-node-element')[0]);
 183     },
 184
 185     getCurrentTextElement: function() {
 186         return this.getDocumentElement(this.wrapper.find('.current-text-element')[0]);
 187     },
 188
 189
 190
 191     setCurrentElement: function(element, params) {
 192         params = _.extend({caretTo: 'end'}, params);
 193         var findFirstDirectTextChild = function(e, nodeToLand) {
 194             var byBrowser = this.getCursor().getPosition().element;
 195             if(byBrowser && byBrowser.parent().sameNode(nodeToLand))
 196                 return byBrowser;
 197             var children = e.children();
 198             for(var i = 0; i < children.length; i++) {
 199                 if(children[i] instanceof documentElement.DocumentTextElement)
 200                     return children[i];
 201             }
 202             return null;
 203         }.bind(this);
 204         var _markAsCurrent = function(element) {
 205             if(element instanceof documentElement.DocumentTextElement) {
 206                 this.wrapper.find('.current-text-element').removeClass('current-text-element');
 207                 element.dom().addClass('current-text-element');
 208             } else {
 209                 this.wrapper.find('.current-node-element').removeClass('current-node-element')
 210                 element.dom().addClass('current-node-element');
 211                 this.publisher('currentElementChanged', element);
 212             }
 213         }.bind(this);
 214
 215
 216         var isTextElement = element instanceof documentElement.DocumentTextElement,
 217             nodeElementToLand = isTextElement ? element.parent() : element,
 218             textElementToLand = isTextElement ? element : findFirstDirectTextChild(element, nodeElementToLand),
 219             currentTextElement = this.getCurrentTextElement(),
 220             currentNodeElement = this.getCurrentNodeElement();
 221
 222         if(currentTextElement && !(currentTextElement.sameNode(textElementToLand)))
 223             this.wrapper.find('.current-text-element').removeClass('current-text-element');
 224
 225         if(textElementToLand) {
 226             _markAsCurrent(textElementToLand);
 227             if(params.caretTo || !textElementToLand.sameNode(this.getCursor().getPosition().element))
 228                 this._moveCaretToTextElement(textElementToLand, params.caretTo); // as method on element?
 229             if(!(textElementToLand.sameNode(currentTextElement)))
 230                 this.publisher('currentTextElementSet', textElementToLand);
 231         } else {
 232             document.getSelection().removeAllRanges();
 233         }
 234
 235         if(!(currentNodeElement && currentNodeElement.sameNode(nodeElementToLand))) {
 236             _markAsCurrent(nodeElementToLand);
 237
 238             this.publisher('currentNodeElementSet', nodeElementToLand);
 239         }
 240     },
 241
 242     _moveCaretToTextElement: function(element, where) {
 243         var range = document.createRange(),
 244             node = element.dom().contents()[0];
 245
 246         if(typeof where !== 'number') {
 247             range.selectNodeContents(node);
 248         } else {
 249             range.setStart(node, where);
 250         }
 251
 252         var collapseArg = true;
 253         if(where === 'end')
 254             collapseArg = false;
 255         range.collapse(collapseArg);
 256
 257         var selection = document.getSelection();
 258
 259         selection.removeAllRanges();
 260         selection.addRange(range);
 261         this.wrapper.focus(); // FF requires this for caret to be put where range colllapses, Chrome doesn't.
 262     },
 263
 264     setCursorPosition: function(position) {
 265         if(position.element)
 266             this._moveCaretToTextElement(position.element, position.offset);
 267     }
 268 });
 269
 270 $.extend(Canvas.prototype.list, {
 271     create: function(params) {
 272         if(!(params.element1.parent().sameNode(params.element2.parent())))
 273             return false;
 274
 275         var parent = params.element1.parent();
 276
 277         if(parent.childIndex(params.element1) > parent.childIndex(params.element2)) {
 278             var tmp = params.element1;
 279             params.element1 = params.element2;
 280             params.element2 = tmp;
 281         }
 282
 283         var elementsToWrap = [];
 284
 285         var place = 'before';
 286         var canvas = this;
 287         parent.children().some(function(element) {
 288             var _e = element;
 289             if(element.sameNode(params.element1))
 290                 place = 'inside';
 291             if(place === 'inside') {
 292                 if(element instanceof documentElement.DocumentTextElement) {
 293                     element = element.wrapWithNodeElement({tag: 'div', klass: 'list.item'});
 294                     if(element.children()[0].sameNode(params.element1))
 295                         params.element1 = element;
 296                 }
 297                 element.setWlxmlClass('item');
 298                 elementsToWrap.push(element);
 299             }
 300             if(_e.sameNode(params.element2))
 301                 return true;
 302         });
 303
 304         var listElement = documentElement.DocumentNodeElement.create({tag: 'div', klass: 'list-items' + (params.type === 'enum' ? '-enum' : '')});
 305
 306         var toret;
 307         if(parent.is('list')) {
 308             listElement.wrapWithNodeElement({tag: 'div', klass: 'item'});
 309             toret = listElement.parent();
 310         } else {
 311             toret = listElement;
 312         }
 313
 314         params.element1.before(toret);
 315
 316         elementsToWrap.forEach(function(element) {
 317             element.detach();
 318             listElement.append(element);
 319         });
 320     },
 321     extractItems: function(params) {
 322         params = _.extend({merge: true}, params);
 323         var list = params.element1.parent();
 324         if(!list.is('list') || !(list.sameNode(params.element2.parent())))
 325             return false;
 326
 327         var idx1 = list.childIndex(params.element1),
 328             idx2 = list.childIndex(params.element2),
 329             precedingItems = [],
 330             extractedItems = [],
 331             succeedingItems = [],
 332             items = list.children(),
 333             listIsNested = list.parent().getWlxmlClass() === 'item',
 334             i;
 335
 336         if(idx1 > idx2) {
 337             var tmp = idx1; idx1 = idx2; idx2 = tmp;
 338         }
 339
 340         items.forEach(function(item, idx) {
 341             if(idx < idx1)
 342                 precedingItems.push(item);
 343             else if(idx >= idx1 && idx <= idx2) {
 344                 extractedItems.push(item);
 345             }
 346             else {
 347                 succeedingItems.push(item);
 348             }
 349         });
 350
 351         var reference = listIsNested ? list.parent() : list;
 352         if(succeedingItems.length === 0) {
 353             var reference_orig = reference;
 354             extractedItems.forEach(function(item) {
 355                 reference.after(item);
 356                 reference = item;
 357                 if(!listIsNested)
 358                     item.setWlxmlClass(null);
 359             });
 360             if(precedingItems.length === 0)
 361                 reference_orig.detach();
 362         } else if(precedingItems.length === 0) {
 363             extractedItems.forEach(function(item) {
 364                 reference.before(item);
 365                 if(!listIsNested)
 366                     item.setWlxmlClass(null);
 367             });
 368         } else {
 369             extractedItems.forEach(function(item) {
 370                 reference.after(item);
 371                 if(!listIsNested)
 372                     item.setWlxmlClass(null);
 373                 reference = item;
 374             });
 375             var secondList = documentElement.DocumentNodeElement.create({tag: 'div', klass:'list-items'}, this),
 376                 toAdd = secondList;
 377
 378             if(listIsNested) {
 379                 toAdd = secondList.wrapWithNodeElement({tag: 'div', klass:'item'});
 380             }
 381             succeedingItems.forEach(function(item) {
 382                 secondList.append(item);
 383             });
 384
 385             reference.after(toAdd);
 386         }
 387         if(!params.merge && listIsNested) {
 388             return this.extractItems({element1: extractedItems[0], element2: extractedItems[extractedItems.length-1]});
 389         }
 390         return true;
 391     },
 392     areItemsOfTheSameList: function(params) {
 393         var e1 = params.element1,
 394             e2 = params.element2;
 395         return e1.parent().sameNode(e2.parent())
 396             && e1.parent().is('list');
 397     }
 398 });
 399
 400
 401 var Cursor = function(canvas) {
 402     this.canvas = canvas;
 403 };
 404
 405 $.extend(Cursor.prototype, {
 406     isSelecting: function() {
 407         var selection = window.getSelection();
 408         return !selection.isCollapsed;
 409     },
 410     isSelectingWithinElement: function() {
 411         return this.isSelecting() && this.getSelectionStart().element.sameNode(this.getSelectionEnd().element);
 412     },
 413     isSelectingSiblings: function() {
 414         return this.isSelecting() && this.getSelectionStart().element.parent().sameNode(this.getSelectionEnd().element.parent());
 415     },
 416     getPosition: function() {
 417         return this.getSelectionAnchor();
 418     },
 419     getSelectionStart: function() {
 420         return this.getSelectionBoundry('start');
 421     },
 422     getSelectionEnd: function() {
 423         return this.getSelectionBoundry('end');
 424     },
 425     getSelectionAnchor: function() {
 426         return this.getSelectionBoundry('anchor');
 427     },
 428     getSelectionBoundry: function(which) {
 429         var selection = window.getSelection(),
 430             anchorElement = this.canvas.getDocumentElement(selection.anchorNode),
 431             focusElement = this.canvas.getDocumentElement(selection.focusNode);
 432
 433         if(anchorElement instanceof documentElement.DocumentNodeElement || focusElement instanceof documentElement.DocumentNodeElement)
 434             return {};
 435
 436         if(which === 'anchor') {
 437             return {
 438                 element: anchorElement,
 439                 offset: selection.anchorOffset,
 440                 offsetAtBeginning: selection.anchorOffset === 0,
 441                 offsetAtEnd: anchorElement && anchorElement.getText().length === selection.anchorOffset
 442             };
 443         }
 444
 445         var element,
 446             offset;
 447
 448         if(anchorElement.parent().sameNode(focusElement.parent())) {
 449             var parent = anchorElement.parent(),
 450                 anchorFirst = parent.childIndex(anchorElement) < parent.childIndex(focusElement);
 451             if(anchorFirst) {
 452                 if(which === 'start') {
 453                     element = anchorElement;
 454                     offset = selection.anchorOffset;
 455                 }
 456                 else if(which === 'end') {
 457                     element = focusElement,
 458                     offset = selection.focusOffset;
 459                 }
 460             } else {
 461                 if(which === 'start') {
 462                     element = focusElement,
 463                     offset = selection.focusOffset
 464                 }
 465                 else if(which === 'end') {
 466                     element = anchorElement;
 467                     offset = selection.anchorOffset;
 468                 }
 469             }
 470         } else {
 471             // TODO: Handle order
 472             if(which === 'start') {
 473                 element = anchorElement;
 474                 offset = selection.anchorOffset
 475             } else {
 476                 element = focusElement;
 477                 offset = selection.focusOffset
 478             }
 479         }
 480
 481         return {
 482             element: element,
 483             offset: offset,
 484             offsetAtBeginning: offset === 0,
 485             offsetAtEnd: element.getText().length === offset
 486         }
 487     }
 488 })
 489
 490 return {
 491     fromXML: function(xml, publisher) {
 492         return new Canvas(xml, publisher);
 493     }
 494 };
 495
 496 });