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
  27                 var meta = {}, others = {};
  28                 for(var i = 0; i < this.attributes.length; i++) {
  29                     var attr = this.attributes[i];
  30                     if(attr.name.substr(0, 5) === 'meta-')
  31                         meta[attr.name.substr(5)] = attr.value;
  32                     else if(attr.name !== 'class')
  33                         others[attr.name] = attr.value;
  34                 }
  35
  36                 var element = documentElement.DocumentNodeElement.create({
  37                     tag: currentTag.prop('tagName').toLowerCase(),
  38                     klass: currentTag.attr('class'),
  39                     meta: meta,
  40                     others: others
  41                 });
  42
  43                 element.dom().append(currentTag.contents());
  44                 ['orig-before', 'orig-append'].forEach(function(attr) {
  45                     element.data(attr, '');
  46                 });
  47                 return element.dom();
  48             });
  49
  50             this.wrapper.find(':not(iframe)').addBack().contents()
  51                 .filter(function() {return this.nodeType === Node.TEXT_NODE})
  52                 .each(function() {
  53
  54                     var el = $(this);
  55
  56                     // TODO: use DocumentElement API
  57                     var spanParent = el.parent().attr('wlxml-tag') === 'span',
  58                         spanBefore = el.prev().length > 0  && $(el.prev()[0]).attr('wlxml-tag') === 'span',
  59                         spanAfter = el.next().length > 0 && $(el.next()[0]).attr('wlxml-tag') === 'span';
  60
  61                     var oldText = this.data,
  62                         oldLength = this.data.length;
  63                     var parent = el.parent(),
  64                         parentContents = parent.contents(),
  65                         idx = parentContents.index(this),
  66                         next = idx < parentContents.length - 1 ? parentContents[idx+1] : null;
  67
  68                     var addInfo = function() {
  69                         if(next) {
  70                             $(next).data('orig-before', oldText);
  71                         } else {
  72                             parent.data('orig-append', oldText);
  73                         }
  74                     }
  75
  76                     if(spanParent || spanBefore || spanAfter) {
  77                         var startSpace = /\s/g.test(this.data.substr(0,1));
  78                         var endSpace = /\s/g.test(this.data.substr(-1)) && this.data.length > 1;
  79                         var trimmed = $.trim(this.data);
  80                         var newText = (startSpace && (spanParent || spanBefore) ? ' ' : '')
  81                                     + trimmed
  82                                     + (endSpace && (spanParent || spanAfter) ? ' ' : '');
  83                         if(newText !== oldText) {
  84                             this.data = newText;
  85                             addInfo();
  86                         }
  87                     } else {
  88
  89                         this.data = $.trim(this.data);
  90                         if(this.data.length === 0 && oldLength > 0 && el.parent().contents().length === 1)
  91                             this.data = ' ';
  92                         if(this.data.length === 0) {
  93                             addInfo();
  94                             el.remove();
  95
  96                             return true; // continue
  97                         }
  98                     }
  99
 100                     var element = documentElement.DocumentTextElement.create({text: this.data});
 101                     $(this).replaceWith(element.dom());
 102                 });
 103
 104             this.d = this.wrapper.children(0);
 105
 106             var canvas = this;
 107             this.wrapper.on('keydown', function(e) {
 108                 if(e.which === 13) {
 109                     e.preventDefault();
 110                     var cursor = canvas.getCursor();
 111                     if(!cursor.isSelecting()) {
 112                         var position = cursor.getPosition(),
 113                             elements = position.element.split({offset: position.offset}),
 114                             newEmpty,
 115                             goto;
 116
 117                         if(position.offsetAtBeginning)
 118                             newEmpty = elements.first;
 119                         else if(position.offsetAtEnd)
 120                             newEmpty = elements.second;
 121                         if(newEmpty) {
 122                             goto = newEmpty.append(documentElement.DocumentTextElement.create({text: '\u200B'}, this));
 123                             canvas.setCurrentElement(goto);
 124                         }
 125                     }
 126                 }
 127             });
 128
 129             this.wrapper.on('keyup', function(e) {
 130                 if(e.which >= 37 && e.which <= 40)
 131                     canvas.setCurrentElement(canvas.getCursor().getPosition().element, {caretTo: false})
 132             });
 133
 134             this.wrapper.on('click', '[wlxml-tag], [wlxml-text]', function(e) {
 135                 e.stopPropagation();
 136                 canvas.setCurrentElement(canvas.getDocumentElement(e.target), {caretTo: false});
 137             });
 138
 139         } else {
 140             this.d = null;
 141         }
 142     },
 143
 144     view: function() {
 145         return this.wrapper;
 146     },
 147
 148     doc: function() {
 149         if(this.d === null)
 150             return null;
 151         return documentElement.DocumentNodeElement.fromHTMLElement(this.d.get(0), this); //{wlxmlTag: this.d.prop('tagName')};
 152     },
 153
 154     wrapText: function(params) {
 155         params = _.extend({textNodeIdx: 0}, params);
 156         if(typeof params.textNodeIdx === 'number')
 157             params.textNodeIdx = [params.textNodeIdx];
 158
 159         var childrenInside = params.inside.children(),
 160             idx1 = Math.min.apply(Math, params.textNodeIdx),
 161             idx2 = Math.max.apply(Math, params.textNodeIdx),
 162             textNode1 = childrenInside[idx1],
 163             textNode2 = childrenInside[idx2],
 164             sameNode = textNode1.sameNode(textNode2),
 165             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
 166             prefixInside = textNode1.getText().substr(params.offsetStart),
 167             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
 168             suffixOutside = textNode2.getText().substr(params.offsetEnd)
 169         ;
 170
 171         var wrapperElement = documentElement.DocumentNodeElement.create({tag: params._with.tag, klass: params._with.klass});
 172         textNode1.after(wrapperElement);
 173         textNode1.detach();
 174
 175         if(prefixOutside.length > 0)
 176             wrapperElement.before({text:prefixOutside});
 177         if(sameNode) {
 178             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 179             wrapperElement.append({text: core});
 180         } else {
 181             textNode2.detach();
 182             if(prefixInside.length > 0)
 183                 wrapperElement.append({text: prefixInside});
 184             for(var i = idx1 + 1; i < idx2; i++) {
 185                 wrapperElement.append(childrenInside[i]);
 186             }
 187             if(suffixInside.length > 0)
 188                 wrapperElement.append({text: suffixInside});
 189         }
 190         if(suffixOutside.length > 0)
 191             wrapperElement.after({text: suffixOutside});
 192         return wrapperElement;
 193     },
 194     getDocumentElement: function(from) {
 195         if(from instanceof HTMLElement || from instanceof Text) {
 196            return documentElement.DocumentElement.fromHTMLElement(from, this);
 197         }
 198     },
 199     getCursor: function() {
 200         return new Cursor(this);
 201     },
 202
 203     list: {},
 204
 205
 206
 207     highlightElement: function(element) {
 208         this.wrapper.find('.highlighted-element').removeClass('highlighted-element');
 209         element.dom().addClass('highlighted-element');
 210     },
 211
 212     dimElement: function(element) {
 213         element.dom().removeClass('highlighted-element');
 214     },
 215
 216     getCurrentNodeElement: function() {
 217         return this.getDocumentElement(this.wrapper.find('.current-node-element')[0]);
 218     },
 219
 220     getCurrentTextElement: function() {
 221         return this.getDocumentElement(this.wrapper.find('.current-text-element')[0]);
 222     },
 223
 224
 225
 226     setCurrentElement: function(element, params) {
 227         params = _.extend({caretTo: 'end'}, params);
 228         var findFirstDirectTextChild = function(e, nodeToLand) {
 229             var byBrowser = this.getCursor().getPosition().element;
 230             if(byBrowser && byBrowser.parent().sameNode(nodeToLand))
 231                 return byBrowser;
 232             var children = e.children();
 233             for(var i = 0; i < children.length; i++) {
 234                 if(children[i] instanceof documentElement.DocumentTextElement)
 235                     return children[i];
 236             }
 237             return null;
 238         }.bind(this);
 239         var _markAsCurrent = function(element) {
 240             if(element instanceof documentElement.DocumentTextElement) {
 241                 this.wrapper.find('.current-text-element').removeClass('current-text-element');
 242                 element.dom().addClass('current-text-element');
 243             } else {
 244                 this.wrapper.find('.current-node-element').removeClass('current-node-element')
 245                 element.dom().addClass('current-node-element');
 246                 this.publisher('currentElementChanged', element);
 247             }
 248         }.bind(this);
 249
 250
 251         var isTextElement = element instanceof documentElement.DocumentTextElement,
 252             nodeElementToLand = isTextElement ? element.parent() : element,
 253             textElementToLand = isTextElement ? element : findFirstDirectTextChild(element, nodeElementToLand),
 254             currentTextElement = this.getCurrentTextElement(),
 255             currentNodeElement = this.getCurrentNodeElement();
 256
 257         if(currentTextElement && !(currentTextElement.sameNode(textElementToLand)))
 258             this.wrapper.find('.current-text-element').removeClass('current-text-element');
 259
 260         if(textElementToLand) {
 261             _markAsCurrent(textElementToLand);
 262             if(params.caretTo || !textElementToLand.sameNode(this.getCursor().getPosition().element))
 263                 this._moveCaretToTextElement(textElementToLand, params.caretTo); // as method on element?
 264             if(!(textElementToLand.sameNode(currentTextElement)))
 265                 this.publisher('currentTextElementSet', textElementToLand);
 266         } else {
 267             document.getSelection().removeAllRanges();
 268         }
 269
 270         if(!(currentNodeElement && currentNodeElement.sameNode(nodeElementToLand))) {
 271             _markAsCurrent(nodeElementToLand);
 272
 273             this.publisher('currentNodeElementSet', nodeElementToLand);
 274         }
 275     },
 276
 277     _moveCaretToTextElement: function(element, where) {
 278         var range = document.createRange(),
 279             node = element.dom().contents()[0];
 280
 281         if(typeof where !== 'number') {
 282             range.selectNodeContents(node);
 283         } else {
 284             range.setStart(node, where);
 285         }
 286
 287         var collapseArg = true;
 288         if(where === 'end')
 289             collapseArg = false;
 290         range.collapse(collapseArg);
 291
 292         var selection = document.getSelection();
 293
 294         selection.removeAllRanges();
 295         selection.addRange(range);
 296         this.wrapper.focus(); // FF requires this for caret to be put where range colllapses, Chrome doesn't.
 297     },
 298
 299     setCursorPosition: function(position) {
 300         if(position.element)
 301             this._moveCaretToTextElement(position.element, position.offset);
 302     },
 303
 304     toXML: function() {
 305         var d = function(element, parent, level) {
 306             console.log(element.getText ? 'text: ' + element.getText() : 'node: ' + element.getWlxmlTag());
 307             var isElementNode = element instanceof documentElement.DocumentNodeElement;
 308             parent.prepend(element.toXML(level));
 309             if(isElementNode) {
 310                 var dom = $(parent.children()[0]),
 311                     elementChildren = element.children();
 312                 for(var i = elementChildren.length - 1; i >= 0; i--) {
 313                     d(elementChildren[i], dom, level + 1);
 314                 }
 315             }
 316         }
 317         var parent = $('<div>');
 318         d(this.doc(), parent, 0);
 319         return parent.html();
 320     }
 321 });
 322
 323 $.extend(Canvas.prototype.list, {
 324     create: function(params) {
 325         if(!(params.element1.parent().sameNode(params.element2.parent())))
 326             return false;
 327
 328         var parent = params.element1.parent();
 329
 330         if(parent.childIndex(params.element1) > parent.childIndex(params.element2)) {
 331             var tmp = params.element1;
 332             params.element1 = params.element2;
 333             params.element2 = tmp;
 334         }
 335
 336         var elementsToWrap = [];
 337
 338         var place = 'before';
 339         var canvas = this;
 340         parent.children().some(function(element) {
 341             var _e = element;
 342             if(element.sameNode(params.element1))
 343                 place = 'inside';
 344             if(place === 'inside') {
 345                 if(element instanceof documentElement.DocumentTextElement) {
 346                     element = element.wrapWithNodeElement({tag: 'div', klass: 'list.item'});
 347                     if(element.children()[0].sameNode(params.element1))
 348                         params.element1 = element;
 349                 }
 350                 element.setWlxmlClass('item');
 351                 elementsToWrap.push(element);
 352             }
 353             if(_e.sameNode(params.element2))
 354                 return true;
 355         });
 356
 357         var listElement = documentElement.DocumentNodeElement.create({tag: 'div', klass: 'list-items' + (params.type === 'enum' ? '-enum' : '')});
 358
 359         var toret;
 360         if(parent.is('list')) {
 361             listElement.wrapWithNodeElement({tag: 'div', klass: 'item'});
 362             toret = listElement.parent();
 363         } else {
 364             toret = listElement;
 365         }
 366
 367         params.element1.before(toret);
 368
 369         elementsToWrap.forEach(function(element) {
 370             element.detach();
 371             listElement.append(element);
 372         });
 373     },
 374     extractItems: function(params) {
 375         params = _.extend({merge: true}, params);
 376         var list = params.element1.parent();
 377         if(!list.is('list') || !(list.sameNode(params.element2.parent())))
 378             return false;
 379
 380         var idx1 = list.childIndex(params.element1),
 381             idx2 = list.childIndex(params.element2),
 382             precedingItems = [],
 383             extractedItems = [],
 384             succeedingItems = [],
 385             items = list.children(),
 386             listIsNested = list.parent().getWlxmlClass() === 'item',
 387             i;
 388
 389         if(idx1 > idx2) {
 390             var tmp = idx1; idx1 = idx2; idx2 = tmp;
 391         }
 392
 393         items.forEach(function(item, idx) {
 394             if(idx < idx1)
 395                 precedingItems.push(item);
 396             else if(idx >= idx1 && idx <= idx2) {
 397                 extractedItems.push(item);
 398             }
 399             else {
 400                 succeedingItems.push(item);
 401             }
 402         });
 403
 404         var reference = listIsNested ? list.parent() : list;
 405         if(succeedingItems.length === 0) {
 406             var reference_orig = reference;
 407             extractedItems.forEach(function(item) {
 408                 reference.after(item);
 409                 reference = item;
 410                 if(!listIsNested)
 411                     item.setWlxmlClass(null);
 412             });
 413             if(precedingItems.length === 0)
 414                 reference_orig.detach();
 415         } else if(precedingItems.length === 0) {
 416             extractedItems.forEach(function(item) {
 417                 reference.before(item);
 418                 if(!listIsNested)
 419                     item.setWlxmlClass(null);
 420             });
 421         } else {
 422             extractedItems.forEach(function(item) {
 423                 reference.after(item);
 424                 if(!listIsNested)
 425                     item.setWlxmlClass(null);
 426                 reference = item;
 427             });
 428             var secondList = documentElement.DocumentNodeElement.create({tag: 'div', klass:'list-items'}, this),
 429                 toAdd = secondList;
 430
 431             if(listIsNested) {
 432                 toAdd = secondList.wrapWithNodeElement({tag: 'div', klass:'item'});
 433             }
 434             succeedingItems.forEach(function(item) {
 435                 secondList.append(item);
 436             });
 437
 438             reference.after(toAdd);
 439         }
 440         if(!params.merge && listIsNested) {
 441             return this.extractItems({element1: extractedItems[0], element2: extractedItems[extractedItems.length-1]});
 442         }
 443         return true;
 444     },
 445     areItemsOfTheSameList: function(params) {
 446         var e1 = params.element1,
 447             e2 = params.element2;
 448         return e1.parent().sameNode(e2.parent())
 449             && e1.parent().is('list');
 450     }
 451 });
 452
 453
 454 var Cursor = function(canvas) {
 455     this.canvas = canvas;
 456 };
 457
 458 $.extend(Cursor.prototype, {
 459     isSelecting: function() {
 460         var selection = window.getSelection();
 461         return !selection.isCollapsed;
 462     },
 463     isSelectingWithinElement: function() {
 464         return this.isSelecting() && this.getSelectionStart().element.sameNode(this.getSelectionEnd().element);
 465     },
 466     isSelectingSiblings: function() {
 467         return this.isSelecting() && this.getSelectionStart().element.parent().sameNode(this.getSelectionEnd().element.parent());
 468     },
 469     getPosition: function() {
 470         return this.getSelectionAnchor();
 471     },
 472     getSelectionStart: function() {
 473         return this.getSelectionBoundry('start');
 474     },
 475     getSelectionEnd: function() {
 476         return this.getSelectionBoundry('end');
 477     },
 478     getSelectionAnchor: function() {
 479         return this.getSelectionBoundry('anchor');
 480     },
 481     getSelectionFocus: function() {
 482         return this.getSelectionBoundry('focus');
 483     },
 484     getSelectionBoundry: function(which) {
 485         var selection = window.getSelection(),
 486             anchorElement = this.canvas.getDocumentElement(selection.anchorNode),
 487             focusElement = this.canvas.getDocumentElement(selection.focusNode);
 488
 489         if(anchorElement instanceof documentElement.DocumentNodeElement || focusElement instanceof documentElement.DocumentNodeElement)
 490             return {};
 491
 492         if(which === 'anchor') {
 493             return {
 494                 element: anchorElement,
 495                 offset: selection.anchorOffset,
 496                 offsetAtBeginning: selection.anchorOffset === 0,
 497                 offsetAtEnd: anchorElement && anchorElement.getText().length === selection.anchorOffset
 498             };
 499         }
 500         if(which === 'focus') {
 501             return {
 502                 element: focusElement,
 503                 offset: selection.focusOffset,
 504                 offsetAtBeginning: selection.focusOffset === 0,
 505                 offsetAtEnd: focusElement && focusElement.getText().length === selection.focusOffset
 506             };
 507         }
 508
 509         var element,
 510             offset;
 511
 512         if(anchorElement.parent().sameNode(focusElement.parent())) {
 513             var parent = anchorElement.parent(),
 514                 anchorFirst = parent.childIndex(anchorElement) < parent.childIndex(focusElement);
 515             if(anchorFirst) {
 516                 if(which === 'start') {
 517                     element = anchorElement;
 518                     offset = selection.anchorOffset;
 519                 }
 520                 else if(which === 'end') {
 521                     element = focusElement,
 522                     offset = selection.focusOffset;
 523                 }
 524             } else {
 525                 if(which === 'start') {
 526                     element = focusElement,
 527                     offset = selection.focusOffset
 528                 }
 529                 else if(which === 'end') {
 530                     element = anchorElement;
 531                     offset = selection.anchorOffset;
 532                 }
 533             }
 534         } else {
 535             // TODO: Handle order via https://developer.mozilla.org/en-US/docs/Web/API/Node.compareDocumentPosition
 536             if(which === 'start') {
 537                 element = anchorElement;
 538                 offset = selection.anchorOffset
 539             } else {
 540                 element = focusElement;
 541                 offset = selection.focusOffset
 542             }
 543         }
 544
 545         return {
 546             element: element,
 547             offset: offset,
 548             offsetAtBeginning: offset === 0,
 549             offsetAtEnd: element.getText().length === offset
 550         }
 551     }
 552 })
 553
 554 return {
 555     fromXML: function(xml, publisher) {
 556         return new Canvas(xml, publisher);
 557     }
 558 };
 559
 560 });