src/smartxml/core.js

   1 define(function(require) {
   2
   3 'use strict';
   4 /* globals Node */
   5
   6 var _ = require('libs/underscore');
   7
   8
   9 var INSERTION = function(implementation) {
  10     var toret = function(node, options) {
  11         var insertion = this.getNodeInsertion(node),
  12             nodeWasContained = this.document.containsNode(insertion.ofNode),
  13             nodeParent,
  14             returned;
  15         options = options || {};
  16         if(!(this.document.containsNode(this)) || !insertion.insertsNew) {
  17             nodeParent = insertion.ofNode.parent();
  18         }
  19         if(!insertion.insertsNew && insertion.ofNode.isSurroundedByTextNodes()) {
  20             var prev = insertion.ofNode.prev(),
  21                 next = insertion.ofNode.next();
  22             prev.setText(prev.getText()+next.getText());
  23             next.detach();
  24         }
  25         returned = implementation.call(this, insertion.ofNode);
  26         if(!options.silent && returned && returned.sameNode(insertion.ofNode)) {
  27             if(!insertion.insertsNew) {
  28                 this.triggerChangeEvent('nodeDetached', {node: insertion.ofNode, parent: nodeParent, move: true});
  29             }
  30             this.triggerChangeEvent('nodeAdded', {node: insertion.ofNode, move: !insertion.insertsNew}, nodeParent, nodeWasContained);
  31         }
  32         return returned;
  33     };
  34     return toret;
  35 };
  36
  37 var documentNodeTransformations = {
  38     detach: function() {
  39         var parent = this.parent(),
  40             existed = this.document.containsNode(this);
  41         this._$.detach();
  42         if(existed) {
  43             this.triggerChangeEvent('nodeDetached', {parent: parent});
  44             if(!parent) {
  45                 // This was the root of the document
  46                 this.document._defineDocumentProperties(null);
  47             }
  48         }
  49         return this;
  50     },
  51
  52     replaceWith: function(node) {
  53         var toret;
  54         if(this.isRoot()) {
  55             return this.document.replaceRoot(node);
  56         }
  57         if(this.parent()) {
  58             toret = this.after(node);
  59             this.detach();
  60             return toret;
  61         }
  62         throw new Error('Cannot replace node without a parent.');
  63     },
  64
  65     after: INSERTION(function(node) {
  66         if(this.isRoot()) {
  67             return;
  68         }
  69         var next = this.next();
  70
  71         if(next && next.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
  72             next.setText(node.getText() + next.getText());
  73             node.detach();
  74             return next;
  75         }
  76         this._$.after(node.nativeNode);
  77         return node;
  78     }),
  79
  80     before: INSERTION(function(node) {
  81         if(this.isRoot()) {
  82             return;
  83         }
  84         var prev = this.prev();
  85         if(prev && prev.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
  86             prev.setText(prev.getText() + node.getText());
  87             node.detach();
  88             return prev;
  89         }
  90         this._$.before(node.nativeNode);
  91         return node;
  92     }),
  93
  94     wrapWith: function(node) {
  95         var insertion = this.getNodeInsertion(node);
  96
  97         if(this.parent() || this.isRoot()) {
  98             this.replaceWith(insertion.ofNode);
  99         }
 100         insertion.ofNode.append(this);
 101         return insertion.ofNode;
 102     },
 103
 104     /**
 105     * Removes parent of a node if node has no siblings.
 106     */
 107     unwrap: function() {
 108         if(this.isRoot()) {
 109             return;
 110         }
 111         var parent = this.parent(),
 112             grandParent;
 113         if(parent.contents().length === 1) {
 114             grandParent = parent.parent();
 115             parent.unwrapContent();
 116             return grandParent;
 117         }
 118     }
 119 };
 120
 121 var elementNodeTransformations = {
 122
 123     detach: function(params) {
 124         var next;
 125         params = _.extend({
 126             normalizeStrategy: 'merge'
 127         }, params);
 128
 129         if(this.parent() && this.isSurroundedByTextNodes()) {
 130             if(params.normalizeStrategy === 'detach-left') {
 131                 this.prev().detach();
 132             } else if(params.normalizeStrategy === 'detach-right') {
 133                 this.next().detach();
 134             } else if(params.normalizeStrategy === 'merge') {
 135                 next = this.next();
 136                 this.prev().appendText(next.getText());
 137                 next.detach();
 138             } else {
 139                 throw new Error('unknown normalize strategy for detach');
 140             }
 141         }
 142         return this.__super__.detach();
 143     },
 144
 145     setTag: function(tagName) {
 146         var node = this.document.createDocumentNode({tagName: tagName});
 147
 148         this.getAttrs().forEach(function(attribute) {
 149             node.setAttr(attribute.name, attribute.value);
 150         });
 151
 152         this.contents().forEach(function(child) {
 153             node.append(child);
 154         });
 155
 156         node.setData(this.getData());
 157
 158         this.replaceWith(node);
 159         return node;
 160     },
 161
 162     setAttr: function(name, value, silent) {
 163         var oldVal = this.getAttr(name);
 164         this._$.attr(name, value);
 165         if(!silent) {
 166             this.triggerChangeEvent('nodeAttrChange', {attr: name, oldVal: oldVal, newVal: value});
 167         }
 168     },
 169
 170     append: INSERTION(function(node) {
 171         var last = _.last(this.contents());
 172         if(last && last.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
 173             last.setText(last.getText() + node.getText());
 174             node.detach();
 175             return last;
 176         } else {
 177             this._$.append(node.nativeNode);
 178             return node;
 179         }
 180     }),
 181
 182     prepend: INSERTION(function(node) {
 183         var first = this.contents()[0];
 184         if(first && first.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
 185             first.setText(node.getText() + first.getText());
 186             node.detach();
 187             return first;
 188         } else {
 189             this._$.prepend(node.nativeNode);
 190             return node;
 191         }
 192     }),
 193
 194     insertAtIndex: function(nativeNode, index) {
 195         var contents = this.contents();
 196         if(index < contents.length) {
 197             return contents[index].before(nativeNode);
 198         } else if(index === contents.length) {
 199             return this.append(nativeNode);
 200         }
 201     },
 202
 203     unwrapContent: function() {
 204         var parent = this.parent();
 205         if(!parent) {
 206             return;
 207         }
 208
 209         this.contents()
 210             .filter(function(child) {
 211                 return child.getProperty('describesParent');
 212             }.bind(this))
 213             .forEach(function(child) {
 214                 child.detach();
 215             });
 216
 217         var myContents = this.contents(),
 218             myIdx = parent.indexOf(this);
 219
 220         if(myContents.length === 0) {
 221             return this.detach();
 222         }
 223
 224         var childrenLength = this.contents().length,
 225             first = true,
 226             shiftRange = false;
 227         this.contents().forEach(function(child) {
 228             var returned = this.before(child);
 229             if(first && !(returned.sameNode(child))) {
 230                 shiftRange = true;
 231                 first = false;
 232             }
 233         }.bind(this));
 234
 235         this.detach();
 236
 237         return {
 238             element1: parent.contents()[myIdx + (shiftRange ? -1 : 0)],
 239             element2: parent.contents()[myIdx + childrenLength-1 + (shiftRange ? -1 : 0)]
 240         };
 241     },
 242
 243     wrapText: function(params) {
 244         return this.document._wrapText(_.extend({inside: this}, params));
 245     }
 246 };
 247
 248 var textNodeTransformations = {
 249     setText: {
 250         impl: function(t, text) {
 251             t.oldText = this.getText();
 252             this.nativeNode.data = text;
 253             this.triggerTextChangeEvent();
 254         },
 255         undo: function(t) {
 256             this.setText(t.oldText);
 257         }
 258     },
 259
 260     before: INSERTION(function(node) {
 261         if(node.nodeType === Node.TEXT_NODE) {
 262             this.prependText(node.getText());
 263             node.detach();
 264             return this;
 265         } else {
 266             return this.__super__.before(node, {silent:true});
 267         }
 268     }),
 269
 270     after: INSERTION(function(node) {
 271         if(node.nodeType === Node.TEXT_NODE) {
 272             this.appendText(node.getText());
 273             node.detach();
 274             return this;
 275         } else {
 276             return this.__super__.after(node, {silent:true});
 277         }
 278     }),
 279
 280     append: function(node) {
 281         if(node.nodeType === Node.TEXT_NODE) {
 282             this.appendText(node.getText());
 283             node.detach();
 284             return this;
 285         }
 286     },
 287     prepend: function(node) {
 288         if(node.nodeType === Node.TEXT_NODE) {
 289             this.prependText(node.getText());
 290             node.detach();
 291             return this;
 292         }
 293     },
 294
 295     appendText: function(text) {
 296         this.nativeNode.data = this.nativeNode.data + text;
 297         this.triggerTextChangeEvent();
 298     },
 299
 300     prependText: function(text) {
 301         this.nativeNode.data = text + this.nativeNode.data;
 302         this.triggerTextChangeEvent();
 303     },
 304
 305     wrapWith: function(desc) {
 306         if(typeof desc.start === 'number' && typeof desc.end === 'number') {
 307             return this.document._wrapText({
 308                 inside: this.parent(),
 309                 textNodeIdx: this.parent().indexOf(this),
 310                 offsetStart: Math.min(desc.start, desc.end),
 311                 offsetEnd: Math.max(desc.start, desc.end),
 312                 _with: {tagName: desc.tagName, attrs: desc.attrs}
 313             });
 314         } else {
 315             return this.__super__.wrapWith.call(this, desc);
 316         }
 317     },
 318
 319     split: function(params) {
 320         var parentElement = this.parent(),
 321             passed = false,
 322             succeedingChildren = [],
 323             prefix = this.getText().substr(0, params.offset),
 324             suffix = this.getText().substr(params.offset);
 325
 326         parentElement.contents().forEach(function(child) {
 327             if(passed) {
 328                 succeedingChildren.push(child);
 329             }
 330             if(child.sameNode(this)) {
 331                 passed = true;
 332             }
 333         }.bind(this));
 334
 335         if(prefix.length > 0) {
 336             this.setText(prefix);
 337         }
 338         else {
 339             this.detach();
 340         }
 341
 342         var attrs = {};
 343         parentElement.getAttrs().forEach(function(attr) {attrs[attr.name] = attr.value; });
 344         var newElement = this.document.createDocumentNode({tagName: parentElement.getTagName(), attrs: attrs});
 345         parentElement.after(newElement);
 346
 347         succeedingChildren.reverse().forEach(function(child) {
 348             newElement.prepend(child);
 349         });
 350         if(suffix.length > 0) {
 351             newElement.prepend({text: suffix});
 352         }
 353
 354         return {first: parentElement, second: newElement};
 355     },
 356
 357     divideWithElementNode: function(node, params) {
 358         var insertion = this.getNodeInsertion(node),
 359             myText = this.getText();
 360
 361         if(params.offset === myText.length) {
 362             return this.after(node);
 363         }
 364         if(params.offset === 0) {
 365             return this.before(node);
 366         }
 367
 368         var lhsText = myText.substr(0, params.offset),
 369             rhsText = myText.substr(params.offset),
 370             rhsTextNode = this.document.createDocumentNode({text: rhsText});
 371
 372         this.setText(lhsText);
 373         this.after(insertion.ofNode);
 374         insertion.ofNode.after(rhsTextNode);
 375         return insertion.ofNode;
 376     }
 377 };
 378
 379 var documentTransformations = {
 380     wrapNodes: function(params) {
 381         if(!(params.node1.parent().sameNode(params.node2.parent()))) {
 382             throw new Error('Wrapping non-sibling nodes not supported.');
 383         }
 384
 385         var parent = params.node1.parent(),
 386             parentContents = parent.contents(),
 387             wrapper = this.createDocumentNode({
 388                 tagName: params._with.tagName,
 389                 attrs: params._with.attrs}),
 390             idx1 = parent.indexOf(params.node1),
 391             idx2 = parent.indexOf(params.node2);
 392
 393         if(idx1 > idx2) {
 394             var tmp = idx1;
 395             idx1 = idx2;
 396             idx2 = tmp;
 397         }
 398
 399         var insertingMethod, insertingTarget;
 400         if(idx1 === 0) {
 401             insertingMethod = 'prepend';
 402             insertingTarget = parent;
 403         } else {
 404             insertingMethod = 'after';
 405             insertingTarget = parentContents[idx1-1];
 406         }
 407
 408         for(var i = idx1; i <= idx2; i++) {
 409             if(!parentContents[i].getProperty('describesParent')) {
 410                 wrapper.append(parentContents[i].detach());
 411             }
 412         }
 413
 414         insertingTarget[insertingMethod](wrapper);
 415         return wrapper;
 416     },
 417
 418     _wrapText: function(params) {
 419         params = _.extend({textNodeIdx: 0}, params);
 420         if(typeof params.textNodeIdx === 'number') {
 421             params.textNodeIdx = [params.textNodeIdx];
 422         }
 423
 424         var contentsInside = params.inside.contents(),
 425             idx1 = Math.min.apply(Math, params.textNodeIdx),
 426             idx2 = Math.max.apply(Math, params.textNodeIdx),
 427             textNode1 = contentsInside[idx1],
 428             textNode2 = contentsInside[idx2],
 429             sameNode = textNode1.sameNode(textNode2),
 430             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
 431             prefixInside = textNode1.getText().substr(params.offsetStart),
 432             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
 433             suffixOutside = textNode2.getText().substr(params.offsetEnd)
 434         ;
 435
 436         if(!(textNode1.parent().sameNode(textNode2.parent()))) {
 437             throw new Error('Wrapping text in non-sibling text nodes not supported.');
 438         }
 439
 440         var wrapperElement = this.createDocumentNode({tagName: params._with.tagName, attrs: params._with.attrs});
 441         textNode1.after(wrapperElement);
 442         textNode1.detach();
 443
 444         if(prefixOutside.length > 0) {
 445             wrapperElement.before({text:prefixOutside});
 446         }
 447         if(sameNode) {
 448             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 449             wrapperElement.append({text: core});
 450         } else {
 451             textNode2.detach();
 452             if(prefixInside.length > 0) {
 453                 wrapperElement.append({text: prefixInside});
 454             }
 455             for(var i = idx1 + 1; i < idx2; i++) {
 456                 if(!contentsInside[i].getProperty('describesParent')) {
 457                     wrapperElement.append(contentsInside[i]);
 458                 }
 459             }
 460             if(suffixInside.length > 0) {
 461                 wrapperElement.append({text: suffixInside});
 462             }
 463         }
 464         if(suffixOutside.length > 0) {
 465             wrapperElement.after({text: suffixOutside});
 466         }
 467         return wrapperElement;
 468     },
 469     replaceRoot: function(node) {
 470         var insertion = this.getNodeInsertion(node);
 471         this.root.detach();
 472         this._defineDocumentProperties(insertion.ofNode._$);
 473         insertion.ofNode.triggerChangeEvent('nodeAdded');
 474         return insertion.ofNode;
 475     },
 476     deleteText: function(params) {
 477         var ptr, next, toDetach, middle, text;
 478
 479         if(params.from.node.sameNode(params.to.node)) {
 480             ptr = params.from.node;
 481             text = ptr.getText();
 482             ptr.setText(text.substr(0, params.from.offset) + text.substr(params.to.offset));
 483             return;
 484         }
 485
 486         // Both edge text nodes need to be edited before anything else happen in case that
 487         // they get merged when detaching content between them.
 488         params.from.node.setText(params.from.node.getText().substr(0, params.from.offset));
 489         params.to.node.setText(params.to.node.getText().substr(params.to.offset));
 490
 491         ptr = params.from.node;
 492         next = ptr.next();
 493
 494         while(next || ptr.parent()) {
 495             if(next) {
 496                 if(next.sameNode(params.to.node)) {
 497                     return;
 498                 }
 499                 else if(next.nodeType === Node.ELEMENT_NODE && next.containsNode(params.to.node)) {
 500                     middle = next;
 501                     break;
 502                 } else {
 503                     toDetach = next;
 504                     next = next.next();
 505                     toDetach.detach();
 506                 }
 507             } else {
 508                 ptr = ptr.parent();
 509                 next = ptr.next();
 510             }
 511         }
 512
 513         if(!this.containsNode(params.to.node)) {
 514             // The end node was merged during detaching nodes above - there is nothing more left to do.
 515             return;
 516         }
 517
 518         ptr = middle.contents()[0];
 519         while(ptr && !ptr.sameNode(params.to.node)) {
 520             if(ptr.nodeType === Node.ELEMENT_NODE && ptr.containsNode(params.to.node)) {
 521                 ptr = ptr.contents()[0];
 522                 continue;
 523             } else {
 524                 ptr = ptr.next();
 525                 ptr.prev().detach();
 526             }
 527         }
 528     }
 529 };
 530
 531 return {
 532     document: {
 533         transformations: documentTransformations
 534     },
 535     documentNode: {
 536         transformations: documentNodeTransformations
 537     },
 538     elementNode: {
 539         transformations: elementNodeTransformations
 540     },
 541     textNode: {
 542         transformations: textNodeTransformations
 543     }
 544 };
 545
 546 });