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.markAsCurrent(canvas.getCursor().getPosition().element)
  86             });
  87
  88             this.wrapper.on('click', '[wlxml-tag], [wlxml-text]', function(e) {
  89                 e.stopPropagation();
  90                 canvas.markAsCurrent(canvas.getCursor().getPosition().element)
  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     markAsCurrent: function(element) {
 160         if(element instanceof documentElement.DocumentTextElement) {
 161             this.wrapper.find('.current-text-element').removeClass('current-text-element');
 162             element.dom().addClass('current-text-element');
 163             this.markAsCurrent(element.parent());
 164             this.publisher('currentTextElementChanged', element);
 165         } else {
 166             this.wrapper.find('.current-node-element').removeClass('current-node-element')
 167             element.dom().addClass('current-node-element');
 168         }
 169
 170     }
 171 });
 172
 173 $.extend(Canvas.prototype.list, {
 174     create: function(params) {
 175         if(!(params.element1.parent().sameNode(params.element2.parent())))
 176             return false;
 177
 178         var parent = params.element1.parent();
 179
 180         if(parent.childIndex(params.element1) > parent.childIndex(params.element2)) {
 181             var tmp = params.element1;
 182             params.element1 = params.element2;
 183             params.element2 = tmp;
 184         }
 185
 186         var elementsToWrap = [];
 187
 188         var place = 'before';
 189         var canvas = this;
 190         parent.children().some(function(element) {
 191             var _e = element;
 192             if(element.sameNode(params.element1))
 193                 place = 'inside';
 194             if(place === 'inside') {
 195                 if(element instanceof documentElement.DocumentTextElement) {
 196                     element = element.wrapWithNodeElement({tag: 'div', klass: 'list.item'});
 197                     if(element.children()[0].sameNode(params.element1))
 198                         params.element1 = element;
 199                 }
 200                 element.setWlxmlClass('item');
 201                 elementsToWrap.push(element);
 202             }
 203             if(_e.sameNode(params.element2))
 204                 return true;
 205         });
 206
 207         var listElement = documentElement.DocumentNodeElement.create({tag: 'div', klass: 'list-items' + (params.type === 'enum' ? '-enum' : '')});
 208
 209         var toret;
 210         if(parent.is('list')) {
 211             listElement.wrapWithNodeElement({tag: 'div', klass: 'item'});
 212             toret = listElement.parent();
 213         } else {
 214             toret = listElement;
 215         }
 216
 217         params.element1.before(toret);
 218
 219         elementsToWrap.forEach(function(element) {
 220             element.detach();
 221             listElement.append(element);
 222         });
 223     },
 224     extractItems: function(params) {
 225         params = _.extend({merge: true}, params);
 226         var list = params.element1.parent();
 227         if(!list.is('list') || !(list.sameNode(params.element2.parent())))
 228             return false;
 229
 230         var idx1 = list.childIndex(params.element1),
 231             idx2 = list.childIndex(params.element2),
 232             precedingItems = [],
 233             extractedItems = [],
 234             succeedingItems = [],
 235             items = list.children(),
 236             listIsNested = list.parent().getWlxmlClass() === 'item',
 237             i;
 238
 239         if(idx1 > idx2) {
 240             var tmp = idx1; idx1 = idx2; idx2 = tmp;
 241         }
 242
 243         items.forEach(function(item, idx) {
 244             if(idx < idx1)
 245                 precedingItems.push(item);
 246             else if(idx >= idx1 && idx <= idx2) {
 247                 extractedItems.push(item);
 248             }
 249             else {
 250                 succeedingItems.push(item);
 251             }
 252         });
 253
 254         var reference = listIsNested ? list.parent() : list;
 255         if(succeedingItems.length === 0) {
 256             var reference_orig = reference;
 257             extractedItems.forEach(function(item) {
 258                 reference.after(item);
 259                 reference = item;
 260                 if(!listIsNested)
 261                     item.setWlxmlClass(null);
 262             });
 263             if(precedingItems.length === 0)
 264                 reference_orig.detach();
 265         } else if(precedingItems.length === 0) {
 266             extractedItems.forEach(function(item) {
 267                 reference.before(item);
 268                 if(!listIsNested)
 269                     item.setWlxmlClass(null);
 270             });
 271         } else {
 272             extractedItems.forEach(function(item) {
 273                 reference.after(item);
 274                 if(!listIsNested)
 275                     item.setWlxmlClass(null);
 276                 reference = item;
 277             });
 278             var secondList = documentElement.DocumentNodeElement.create({tag: 'div', klass:'list-items'}, this),
 279                 toAdd = secondList;
 280
 281             if(listIsNested) {
 282                 toAdd = secondList.wrapWithNodeElement({tag: 'div', klass:'item'});
 283             }
 284             succeedingItems.forEach(function(item) {
 285                 secondList.append(item);
 286             });
 287
 288             reference.after(toAdd);
 289         }
 290         if(!params.merge && listIsNested) {
 291             return this.extractItems({element1: extractedItems[0], element2: extractedItems[extractedItems.length-1]});
 292         }
 293         return true;
 294     },
 295     areItemsOfTheSameList: function(params) {
 296         var e1 = params.element1,
 297             e2 = params.element2;
 298         return e1.parent().sameNode(e2.parent())
 299             && e1.parent().is('list');
 300     }
 301 });
 302
 303
 304 var Cursor = function(canvas) {
 305     this.canvas = canvas;
 306 };
 307
 308 $.extend(Cursor.prototype, {
 309     isSelecting: function() {
 310         var selection = window.getSelection();
 311         return !selection.isCollapsed;
 312     },
 313     isSelectingWithinElement: function() {
 314         return this.isSelecting() && this.getSelectionStart().element.sameNode(this.getSelectionEnd().element);
 315     },
 316     isSelectingSiblings: function() {
 317         return this.isSelecting() && this.getSelectionStart().element.parent().sameNode(this.getSelectionEnd().element.parent());
 318     },
 319     getPosition: function() {
 320         return this.getSelectionAnchor();
 321     },
 322     getSelectionStart: function() {
 323         return this.getSelectionBoundry('start');
 324     },
 325     getSelectionEnd: function() {
 326         return this.getSelectionBoundry('end');
 327     },
 328     getSelectionAnchor: function() {
 329         return this.getSelectionBoundry('anchor');
 330     },
 331     getSelectionBoundry: function(which) {
 332         var selection = window.getSelection(),
 333             anchorElement = this.canvas.getDocumentElement(selection.anchorNode),
 334             focusElement = this.canvas.getDocumentElement(selection.focusNode);
 335
 336         if(which === 'anchor') {
 337             return {
 338                 element: anchorElement,
 339                 offset: selection.anchorOffset
 340             };
 341         }
 342
 343         var element,
 344             offset;
 345
 346         if(anchorElement.parent().sameNode(focusElement.parent())) {
 347             var parent = anchorElement.parent(),
 348                 anchorFirst = parent.childIndex(anchorElement) < parent.childIndex(focusElement);
 349             if(anchorFirst) {
 350                 if(which === 'start') {
 351                     element = anchorElement;
 352                     offset = selection.anchorOffset;
 353                 }
 354                 else if(which === 'end') {
 355                     element = focusElement,
 356                     offset = selection.focusOffset;
 357                 }
 358             } else {
 359                 if(which === 'start') {
 360                     element = focusElement,
 361                     offset = selection.focusOffset
 362                 }
 363                 else if(which === 'end') {
 364                     element = anchorElement;
 365                     offset = selection.anchorOffset;
 366                 }
 367             }
 368         } else {
 369             // TODO: Handle order
 370             if(which === 'start') {
 371                 element = anchorElement;
 372                 offset = selection.anchorOffset
 373             } else {
 374                 element = focusElement;
 375                 offset = selection.focusOffset
 376             }
 377         }
 378
 379         return {
 380             element: element,
 381             offset: offset
 382         }
 383     }
 384 })
 385
 386 return {
 387     fromXML: function(xml, publisher) {
 388         return new Canvas(xml, publisher);
 389     }
 390 };
 391
 392 });