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