src/editor/modules/documentCanvas/canvas/documentElement.js

   1 define([
   2 'libs/jquery',
   3 'libs/underscore',
   4 'modules/documentCanvas/classAttributes',
   5 'modules/documentCanvas/canvas/utils',
   6 'modules/documentCanvas/canvas/widgets',
   7 'modules/documentCanvas/canvas/wlxmlManagers'
   8 ], function($, _, classAttributes, utils, widgets, wlxmlManagers) {
   9
  10 'use strict';
  11
  12
  13 // DocumentElement represents a text or an element node from WLXML document rendered inside Canvas
  14 var DocumentElement = function(htmlElement, canvas) {
  15     if(arguments.length === 0)
  16         return;
  17     this.canvas = canvas;
  18     this._setupDOMHandler(htmlElement);
  19 }
  20
  21
  22 var elementTypeFromWlxmlNode = function(wlxmlNode) {
  23     return wlxmlNode.nodeType === Node.TEXT_NODE ? DocumentTextElement : DocumentNodeElement;
  24 }
  25
  26 $.extend(DocumentElement, {
  27     create: function(node, canvas) {
  28         return elementTypeFromWlxmlNode(node).create(node, canvas);
  29     },
  30
  31     createDOM: function(wlxmlNode) {
  32         return elementTypeFromParams(wlxmlNode).createDOM(params);
  33     },
  34
  35     fromHTMLElement: function(htmlElement, canvas) {
  36         var $element = $(htmlElement);
  37         if(htmlElement.nodeType === Node.ELEMENT_NODE && $element.attr('document-node-element') !== undefined)
  38             return DocumentNodeElement.fromHTMLElement(htmlElement, canvas);
  39         if($element.attr('document-text-element') !== undefined || (htmlElement.nodeType === Node.TEXT_NODE && $element.parent().attr('document-text-element') !== undefined))
  40             return DocumentTextElement.fromHTMLElement(htmlElement, canvas);
  41         return undefined;
  42     }
  43 });
  44
  45 $.extend(DocumentElement.prototype, {
  46     _setupDOMHandler: function(htmlElement) {
  47         this.$element = $(htmlElement);
  48     },
  49     bound: function() {
  50         return $.contains(document.documentElement, this.dom()[0]);
  51     },
  52     dom: function() {
  53         return this.$element;
  54     },
  55     data: function() {
  56         var dom = this.dom(),
  57             args = Array.prototype.slice.call(arguments, 0);
  58         if(args.length === 2 && args[1] === undefined)
  59             return dom.removeData(args[0]);
  60         return dom.data.apply(dom, arguments);
  61     },
  62     parent: function() {
  63         var parents = this.$element.parents('[document-node-element]');
  64         if(parents.length)
  65             return DocumentElement.fromHTMLElement(parents[0], this.canvas);
  66         return null;
  67     },
  68
  69     parents: function() {
  70         var parents = [],
  71             parent = this.parent();
  72         while(parent) {
  73             parents.push(parent);
  74             parent = parent.parent();
  75         }
  76         return parents;
  77     },
  78
  79     sameNode: function(other) {
  80         return other && (typeof other === typeof this) && other.dom()[0] === this.dom()[0];
  81     },
  82
  83     wrapWithNodeElement: function(wlxmlNode) {
  84         var wrapper = DocumentNodeElement.create({tag: wlxmlNode.tag, klass: wlxmlNode.klass}, this);
  85         this.dom().replaceWith(wrapper.dom());
  86         wrapper.append(this);
  87         return wrapper;
  88     },
  89
  90     markAsCurrent: function() {
  91         this.canvas.markAsCurrent(this);
  92     },
  93
  94     getVerticallyFirstTextElement: function() {
  95         var toret;
  96         this.children().some(function(child) {
  97             if(!child.isVisible())
  98                 return false; // continue
  99             if(child instanceof DocumentTextElement) {
 100                 toret = child;
 101                 return true; // break
 102             } else {
 103                 toret = child.getVerticallyFirstTextElement();
 104                 if(toret)
 105                     return true; // break
 106             }
 107         });
 108         return toret;
 109     },
 110
 111     getPreviousTextElement: function(includeInvisible) {
 112         return this.getNearestTextElement('above', includeInvisible);
 113     },
 114
 115     getNextTextElement: function(includeInvisible) {
 116         return this.getNearestTextElement('below', includeInvisible);
 117     },
 118
 119     getNearestTextElement: function(direction, includeInvisible) {
 120         includeInvisible = includeInvisible !== undefined ? includeInvisible : false;
 121         var selector = '[document-text-element]' + (includeInvisible ? '' : ':visible');
 122         return this.canvas.getDocumentElement(utils.nearestInDocumentOrder(selector, direction, this.dom()[0]));
 123     },
 124
 125     isVisible: function() {
 126         return this instanceof DocumentTextElement || this.getWlxmlTag() !== 'metadata';
 127     },
 128
 129     isInsideList: function() {
 130         return this.parents().some(function(parent) {
 131             return parent.is('list');
 132         });
 133     },
 134
 135     exec: function(method) {
 136         var manager = this.data('_wlxmlManager');
 137         if(manager[method])
 138             return manager[method].apply(manager, Array.prototype.slice.call(arguments, 1));
 139     }
 140 });
 141
 142
 143 // DocumentNodeElement represents an element node from WLXML document rendered inside Canvas
 144 var DocumentNodeElement = function(htmlElement, canvas) {
 145     DocumentElement.call(this, htmlElement, canvas);
 146 };
 147
 148 $.extend(DocumentNodeElement, {
 149     create: function(wlxmlNode, canvas) {
 150         return this.fromHTMLElement(this.createDOM(wlxmlNode, canvas)[0], canvas);
 151     },
 152
 153     fromHTMLElement: function(htmlElement, canvas) {
 154         return new this(htmlElement, canvas);
 155     },
 156
 157     createDOM: function(wlxmlNode, canvas) {
 158         var dom = $('<div>')
 159                 .attr('document-node-element', ''),
 160             widgetsContainer = $('<div>')
 161                 .addClass('canvas-widgets')
 162                 .attr('contenteditable', false),
 163             container = $('<div>')
 164                 .attr('document-element-content', '');
 165
 166         dom.append(widgetsContainer, container);
 167         // Make sure widgets aren't navigable with arrow keys
 168         widgetsContainer.find('*').add(widgetsContainer).attr('tabindex', -1);
 169
 170         var element = this.fromHTMLElement(dom[0], canvas);
 171
 172         element.data('wlxmlNode', wlxmlNode);
 173         wlxmlNode.setData('canvasElement', element);
 174
 175         element.setWlxml({tag: wlxmlNode.getTagName(), klass: wlxmlNode.getClass()});
 176
 177         _.keys(wlxmlNode.getMetaAttributes()).forEach(function(key) {
 178             element.setWlxmlMetaAttr(key, params.meta[key]);
 179         });
 180
 181         wlxmlNode.contents().forEach((function(node) {
 182             container.append(DocumentElement.create(node).dom());
 183         }).bind(this));
 184
 185         return dom;
 186     }
 187
 188 });
 189
 190 var manipulate = function(e, params, action) {
 191     var element;
 192     if(params instanceof DocumentElement) {
 193         element = params;
 194     } else {
 195         element = DocumentElement.create(params);
 196     }
 197     var target = (action === 'append' || action === 'prepend') ? e._container() : e.dom();
 198     target[action](element.dom());
 199     return element;
 200 };
 201
 202 DocumentNodeElement.prototype = new DocumentElement();
 203
 204
 205 $.extend(DocumentNodeElement.prototype, {
 206     _container: function() {
 207         return this.dom().children('[document-element-content]');
 208     },
 209     detach: function() {
 210         var parent = this.parent();
 211         if(!parent)
 212             return;
 213
 214         var parentChildren = parent.children(),
 215             myIdx = parent.childIndex(this);
 216
 217         if(myIdx > 0 && myIdx < parentChildren.length) {
 218             if((parentChildren[myIdx-1] instanceof DocumentTextElement) && (parentChildren[myIdx+1] instanceof DocumentTextElement)) {
 219                 parentChildren[myIdx-1].appendText(parentChildren[myIdx+1].getText());
 220                 parentChildren[myIdx+1].detach();
 221             }
 222         }
 223         this.dom().detach();
 224         this.canvas = null;
 225         return this;
 226     },
 227     unwrapContents: function() {
 228         var parent = this.parent();
 229         if(!parent)
 230             return;
 231
 232         var parentChildren = parent.children(),
 233             myChildren = this.children(),
 234             myIdx = parent.childIndex(this);
 235
 236         if(myChildren.length === 0)
 237             return this.detach();
 238
 239         var moveLeftRange, moveRightRange, leftMerged;
 240
 241         if(myIdx > 0 && (parentChildren[myIdx-1] instanceof DocumentTextElement) && (myChildren[0] instanceof DocumentTextElement)) {
 242             parentChildren[myIdx-1].appendText(myChildren[0].getText());
 243             myChildren[0].detach();
 244             moveLeftRange = true;
 245             leftMerged = true;
 246         } else {
 247             leftMerged = false;
 248         }
 249
 250         if(!(leftMerged && myChildren.length === 1)) {
 251             if(myIdx < parentChildren.length - 1 && (parentChildren[myIdx+1] instanceof DocumentTextElement) && (myChildren[myChildren.length-1] instanceof DocumentTextElement)) {
 252                 parentChildren[myIdx+1].prependText(myChildren[myChildren.length-1].getText());
 253                 myChildren[myChildren.length-1].detach();
 254                 moveRightRange = true;
 255             }
 256         }
 257
 258         var childrenLength = this.children().length;
 259         this.children().forEach(function(child) {
 260             this.before(child);
 261         }.bind(this));
 262
 263         this.detach();
 264
 265         return {
 266             element1: parent.children()[myIdx + (moveLeftRange ? -1 : 0)],
 267             element2: parent.children()[myIdx + childrenLength-1 + (moveRightRange ? 1 : 0)]
 268         };
 269     },
 270     toXML: function(level) {
 271         var node = $('<' + this.getWlxmlTag() + '>');
 272
 273         if(this.getWlxmlClass())
 274             node.attr('class', this.getWlxmlClass());
 275         var meta = this.getWlxmlMetaAttrs();
 276         meta.forEach(function(attr) {
 277             if(attr.value)
 278                 node.attr('meta-' + attr.name, attr.value);
 279         });
 280         _.keys(this.data('other-attrs') || {}).forEach(function(key) {
 281             node.attr(key, this.data('other-attrs')[key]);
 282         }, this);
 283
 284         var addFormatting = function() {
 285             var toret = $('<div>');
 286             var formattings = {};
 287
 288             if(this.data('orig-before') !== undefined) {
 289                 if(this.data('orig-before')) {
 290                     toret.prepend(document.createTextNode(this.data('orig-before')));
 291                 }
 292             } else if(level && this.getWlxmlTag() !== 'span') {
 293                 toret.append('\n' + (new Array(level * 2 + 1)).join(' '));
 294             }
 295
 296             toret.append(node);
 297
 298             if(this.data('orig-after')) {
 299                 toret.append(document.createTextNode(this.data('orig-after')));
 300             }
 301
 302             /* Inside node */
 303             if(this.data('orig-begin')) {
 304                 node.prepend(this.data('orig-begin'));
 305                 formattings.begin = true;
 306             }
 307
 308             if(this.data('orig-end') !== undefined) {
 309                 if(this.data('orig-end')) {
 310                     node.append(this.data('orig-end'));
 311                 }
 312             } else if(this.getWlxmlTag() !== 'span' && children.length){
 313                 node.append('\n' + (new Array(level * 2 + 1)).join(' '));
 314             }
 315
 316             return {parts: toret.contents(), formattings: formattings};
 317         }.bind(this);
 318
 319
 320
 321         var children = this.children(),
 322             childParts;
 323
 324         var formatting = addFormatting(node);
 325
 326         for(var i = children.length - 1; i >= 0; i--) {
 327             childParts = children[i].toXML(level + 1);
 328             if(typeof childParts === 'string')
 329                 childParts = [document.createTextNode(childParts)];
 330
 331             if(formatting.formattings.begin) {
 332                 $(node.contents()[0]).after(childParts);
 333             } else
 334                 node.prepend(childParts);
 335         }
 336         return formatting.parts;
 337     },
 338     append: function(params) {
 339         if(params.tag !== 'span')
 340             this.data('orig-end', undefined);
 341         return manipulate(this, params, 'append');
 342     },
 343     prepend: function(params) {
 344         return manipulate(this, params, 'prepend');
 345     },
 346     before: function(params) {
 347         return manipulate(this, params, 'before');
 348
 349     },
 350     after: function(params) {
 351         return manipulate(this, params, 'after');
 352     },
 353     children: function() {
 354         var toret = [];
 355         if(this instanceof DocumentTextElement)
 356             return toret;
 357
 358
 359         var elementContent = this._container().contents();
 360         var element = this;
 361         elementContent.each(function(idx) {
 362             var childElement = DocumentElement.fromHTMLElement(this, element.canvas);
 363             if(childElement === undefined)
 364                 return true;
 365             if(idx === 0 && elementContent.length > 1 && elementContent[1].nodeType === Node.ELEMENT_NODE && (childElement instanceof DocumentTextElement) && $.trim($(this).text()) === '')
 366                 return true;
 367             if(idx > 0 && childElement instanceof DocumentTextElement) {
 368                 if(toret[toret.length-1] instanceof DocumentNodeElement && $.trim($(this).text()) === '')
 369                     return true;
 370             }
 371             toret.push(childElement);
 372         });
 373         return toret;
 374     },
 375     childIndex: function(child) {
 376         var children = this.children(),
 377             toret = null;
 378         children.forEach(function(c, idx) {
 379             if(c.sameNode(child)) {
 380                 toret = idx;
 381                 return false;
 382             }
 383         });
 384         return toret;
 385     },
 386     getWlxmlTag: function() {
 387         return this._container().attr('wlxml-tag');
 388     },
 389     setWlxmlTag: function(tag) {
 390         if(tag === this.getWlxmlTag())
 391             return;
 392
 393         this._container().attr('wlxml-tag', tag);
 394         if(!this.__updatingWlxml)
 395             this._updateWlxmlManager();
 396     },
 397     getWlxmlClass: function() {
 398         var klass = this._container().attr('wlxml-class');
 399         if(klass)
 400             return klass.replace(/-/g, '.');
 401         return undefined;
 402     },
 403     setWlxmlClass: function(klass) {
 404         if(klass === this.getWlxmlClass())
 405             return;
 406
 407         this.getWlxmlMetaAttrs().forEach(function(attr) {
 408             if(!classAttributes.hasMetaAttr(klass, attr.name))
 409                 this.dom().removeAttr('wlxml-meta-' + attr.name);
 410         }, this);
 411
 412         if(klass)
 413             this._container().attr('wlxml-class', klass.replace(/\./g, '-'));
 414         else
 415             this._container().removeAttr('wlxml-class');
 416         if(!this.__updatingWlxml)
 417             this._updateWlxmlManager();
 418     },
 419     setWlxml: function(params) {
 420         this.__updatingWlxml = true;
 421         if(params.tag !== undefined)
 422             this.setWlxmlTag(params.tag);
 423         if(params.klass !== undefined)
 424             this.setWlxmlClass(params.klass);
 425         this._updateWlxmlManager();
 426         this.__updatingWlxml = false;
 427     },
 428     _updateWlxmlManager: function() {
 429         var manager = wlxmlManagers.getFor(this);
 430         this.data('_wlxmlManager', manager);
 431         manager.setup();
 432     },
 433     is: function(what) {
 434         if(what === 'list' && _.contains(['list.items', 'list.items.enum'], this.getWlxmlClass()))
 435             return true;
 436         return false;
 437     },
 438
 439     getWlxmlMetaAttr: function(attr) {
 440         return this.dom().attr('wlxml-meta-'+attr);
 441     },
 442
 443     getWlxmlMetaAttrs: function() {
 444         var toret = [];
 445         var attrList = classAttributes.getMetaAttrsList(this.getWlxmlClass());
 446         attrList.all.forEach(function(attr) {
 447             toret.push({name: attr.name, value: this.getWlxmlMetaAttr(attr.name) || ''});
 448         }, this);
 449         return toret;
 450     },
 451
 452     setWlxmlMetaAttr: function(attr, value) {
 453         this.dom().attr('wlxml-meta-'+attr, value);
 454     },
 455
 456     toggleLabel: function(toggle) {
 457         var displayCss = toggle ? 'inline-block' : 'none';
 458         var label = this.dom().children('.canvas-widgets').find('.canvas-widget-label');
 459         label.css('display', displayCss);
 460         this.toggleHighlight(toggle);
 461     },
 462
 463     toggleHighlight: function(toggle) {
 464         this._container().toggleClass('highlighted-element', toggle);
 465     },
 466
 467     toggle: function(toggle) {
 468         var mng = this.data('_wlxmlManager');
 469         if(mng) {
 470             mng.toggle(toggle);
 471         }
 472     }
 473 });
 474
 475
 476 // DocumentNodeElement represents a text node from WLXML document rendered inside Canvas
 477 var DocumentTextElement = function(htmlElement, canvas) {
 478     DocumentElement.call(this, htmlElement, canvas);
 479 };
 480
 481 $.extend(DocumentTextElement, {
 482     createDOM: function(wlxmlTextNode) {
 483         var dom = $('<div>')
 484             .attr('document-text-element', '')
 485             .text(wlxmlTextNode.getText() || utils.unicode.ZWS),
 486         element = this.fromHTMLElement(dom[0], this);
 487         element.data('wlxmlNode', wlxmlTextNode);
 488         return dom;
 489     },
 490
 491     create: function(wlxmlTextNode, canvas) {
 492         return this.fromHTMLElement(this.createDOM(wlxmlTextNode)[0]);
 493     },
 494
 495     fromHTMLElement: function(htmlElement, canvas) {
 496         return new this(htmlElement, canvas);
 497     },
 498     isContentContainer: function(htmlElement) {
 499         return htmlElement.nodeType === Node.TEXT_NODE && $(htmlElement).parent().is('[document-text-element]');
 500     }
 501 });
 502
 503 DocumentTextElement.prototype = new DocumentElement();
 504
 505 $.extend(DocumentTextElement.prototype, {
 506     toXML: function(parent) {
 507         return this.getText();
 508     },
 509     _setupDOMHandler: function(htmlElement) {
 510         var $element = $(htmlElement);
 511         if(htmlElement.nodeType === Node.TEXT_NODE)
 512             this.$element = $element.parent();
 513         else
 514             this.$element = $element;
 515     },
 516     detach: function() {
 517         this.dom().detach();
 518         this.canvas = null;
 519         return this;
 520     },
 521     setText: function(text) {
 522         this.dom().contents()[0].data = text;
 523     },
 524     appendText: function(text) {
 525         this.dom().contents()[0].data += text;
 526     },
 527     prependText: function(text) {
 528         this.dom().contents()[0].data = text + this.dom().contents()[0].data;
 529     },
 530     getText: function() {
 531         return this.dom().text().replace(utils.unicode.ZWS, '');
 532     },
 533     isEmpty: function() {
 534         // Having at least Zero Width Space is guaranteed be Content Observer
 535         return this.dom().contents()[0].data === utils.unicode.ZWS;
 536     },
 537     after: function(params) {
 538         if(params instanceof DocumentTextElement || params.text)
 539             return false;
 540         var element;
 541         if(params instanceof DocumentNodeElement) {
 542             element = params;
 543         } else {
 544             element = DocumentNodeElement.create(params, this.canvas);
 545         }
 546         this.dom().wrap('<div>');
 547         this.dom().parent().after(element.dom());
 548         this.dom().unwrap();
 549         return element;
 550     },
 551     before: function(params) {
 552         if(params instanceof DocumentTextElement || params.text)
 553             return false;
 554         var element;
 555         if(params instanceof DocumentNodeElement) {
 556             element = params;
 557         } else {
 558             element = DocumentNodeElement.create(params, this.canvas);
 559         }
 560         this.dom().wrap('<div>');
 561         this.dom().parent().before(element.dom());
 562         this.dom().unwrap();
 563         return element;
 564     },
 565     wrapWithNodeElement: function(wlxmlNode) {
 566         if(typeof wlxmlNode.start === 'number' && typeof wlxmlNode.end === 'number') {
 567             return this.canvas.wrapText({
 568                 inside: this.parent(),
 569                 textNodeIdx: this.parent().childIndex(this),
 570                 offsetStart: Math.min(wlxmlNode.start, wlxmlNode.end),
 571                 offsetEnd: Math.max(wlxmlNode.start, wlxmlNode.end),
 572                 _with: {tag: wlxmlNode.tag, klass: wlxmlNode.klass}
 573             });
 574         } else {
 575             return DocumentElement.prototype.wrapWithNodeElement.call(this, wlxmlNode);
 576         }
 577     },
 578     unwrap: function() {
 579         var parent = this.parent(),
 580             toret;
 581         if(parent.children().length === 1) {
 582             toret = parent.parent();
 583             var grandParent = parent.parent();
 584             if(grandParent) {
 585                 var grandParentChildren = grandParent.children(),
 586                     idx = grandParent.childIndex(parent),
 587                     prev = idx - 1 > -1 ? grandParentChildren[idx-1] : null,
 588                     next = idx + 1 < grandParentChildren.length ? grandParentChildren[idx+1] : null;
 589
 590                 prev = (prev instanceof DocumentTextElement) ? prev : null;
 591                 next = (next instanceof DocumentTextElement) ? next : null;
 592
 593                 if(prev && next) {
 594                     prev.setText(prev.getText() + this.getText() + next.getText());
 595                     next.detach();
 596                 } else if (prev || next) {
 597                     var target = prev ? prev : next,
 598                         newText = prev ? target.getText() + this.getText() : this.getText() + target.getText();
 599                     target.setText(newText);
 600                 } else {
 601                     parent.after(this);
 602                 }
 603             } else {
 604                 parent.after(this);
 605             }
 606             parent.detach();
 607             return toret;
 608         }
 609     },
 610     split: function(params) {
 611         var parentElement = this.parent(),
 612             myIdx = parentElement.childIndex(this),
 613             myCanvas = this.canvas,
 614             passed = false,
 615             succeedingChildren = [],
 616             thisElement = this,
 617             prefix = this.getText().substr(0, params.offset),
 618             suffix = this.getText().substr(params.offset);
 619
 620         parentElement.children().forEach(function(child) {
 621             if(passed)
 622                 succeedingChildren.push(child);
 623             if(child.sameNode(thisElement))
 624                 passed = true;
 625         });
 626
 627         if(prefix.length > 0)
 628             this.setText(prefix);
 629         else
 630             this.detach();
 631
 632         var newElement = DocumentNodeElement.create({tag: parentElement.getWlxmlTag(), klass: parentElement.getWlxmlClass()}, myCanvas);
 633         parentElement.after(newElement);
 634
 635         if(suffix.length > 0)
 636             newElement.append({text: suffix});
 637         succeedingChildren.forEach(function(child) {
 638             newElement.append(child);
 639         });
 640
 641         return {first: parentElement, second: newElement};
 642     },
 643     divide: function(params) {
 644         var myText = this.getText();
 645
 646         if(params.offset === myText.length)
 647             return this.after(params);
 648         if(params.offset === 0)
 649             return this.before(params);
 650
 651         var lhsText = myText.substr(0, params.offset),
 652             rhsText = myText.substr(params.offset),
 653             newElement = DocumentNodeElement.create({tag: params.tag, klass: params.klass}, this.canvas),
 654             rhsTextElement = DocumentTextElement.create({text: rhsText});
 655
 656         this.setText(lhsText);
 657         this.after(newElement);
 658         newElement.after(rhsTextElement);
 659         return newElement;
 660     },
 661
 662     toggleHighlight: function() {
 663         // do nothing for now
 664     }
 665 });
 666
 667 return {
 668     DocumentElement: DocumentElement,
 669     DocumentNodeElement: DocumentNodeElement,
 670     DocumentTextElement: DocumentTextElement
 671 };
 672
 673 });