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))) {
  17             nodeParent = insertion.ofNode.parent();
  18         }
  19         returned = implementation.call(this, insertion.ofNode);
  20         if(!options.silent && returned.sameNode(insertion.ofNode)) {
  21             this.triggerChangeEvent(insertion.insertsNew ? 'nodeAdded' : 'nodeMoved', {node: insertion.ofNode}, nodeParent, nodeWasContained);
  22         }
  23         return returned;
  24     };
  25     return toret;
  26 };
  27
  28 var documentNodeTransformations = {
  29     detach: function() {
  30         var parent = this.parent(),
  31             existed = this.document.containsNode(this);
  32         this._$.detach();
  33         if(existed) {
  34             this.triggerChangeEvent('nodeDetached', {parent: parent});
  35         }
  36         return this;
  37     },
  38
  39     replaceWith: function(node) {
  40         var toret;
  41         if(this.isRoot()) {
  42             return this.document.replaceRoot(node);
  43         }
  44         toret = this.after(node);
  45         this.detach();
  46         return toret;
  47     },
  48
  49     after: INSERTION(function(node) {
  50         var next = this.next();
  51         if(next && next.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
  52             next.setText(node.getText() + next.getText());
  53             node.detach();
  54             return next;
  55         }
  56         this._$.after(node.nativeNode);
  57         return node;
  58     }),
  59
  60     before: INSERTION(function(node) {
  61         var prev = this.prev();
  62         if(prev && prev.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
  63             prev.setText(prev.getText() + node.getText());
  64             node.detach();
  65             return prev;
  66         }
  67         this._$.before(node.nativeNode);
  68         return node;
  69     }),
  70
  71     wrapWith: function(node) {
  72         var insertion = this.getNodeInsertion(node);
  73         if(this.parent()) {
  74             this.before(insertion.ofNode);
  75         }
  76         insertion.ofNode.append(this);
  77         return insertion.ofNode;
  78     },
  79
  80     /**
  81     * Removes parent of a node if node has no siblings.
  82     */
  83     unwrap: function() {
  84         if(this.isRoot()) {
  85             return;
  86         }
  87         var parent = this.parent(),
  88             grandParent;
  89         if(parent.contents().length === 1) {
  90             grandParent = parent.parent();
  91             parent.unwrapContent();
  92             return grandParent;
  93         }
  94     }
  95 };
  96
  97 var elementNodeTransformations = {
  98
  99     detach: function() {
 100         var next;
 101         if(this.parent() && this.isSurroundedByTextElements()) {
 102             next = this.next();
 103             this.prev().appendText(next.getText());
 104             next.detach();
 105         }
 106         return this.__super__.detach();
 107     },
 108
 109     setTag: function(tagName) {
 110         var node = this.document.createDocumentNode({tagName: tagName}),
 111             oldTagName = this.getTagName(),
 112             myContents = this._$.contents();
 113
 114         this.getAttrs().forEach(function(attribute) {
 115             node.setAttr(attribute.name, attribute.value, true);
 116         });
 117         node.setData(this.getData());
 118
 119         if(this.sameNode(this.document.root)) {
 120             this.document._defineDocumentProperties(node._$);
 121         }
 122
 123         /* TODO: This invalidates old references to this node. Caching instances on nodes would fix this. */
 124         this._$.replaceWith(node._$);
 125         this._setNativeNode(node._$[0]);
 126         this._$.append(myContents);
 127         this.triggerChangeEvent('nodeTagChange', {oldTagName: oldTagName, newTagName: this.getTagName()});
 128     },
 129
 130
 131     setAttr: function(name, value, silent) {
 132         var oldVal = this.getAttr(name);
 133         this._$.attr(name, value);
 134         if(!silent) {
 135             this.triggerChangeEvent('nodeAttrChange', {attr: name, oldVal: oldVal, newVal: value});
 136         }
 137     },
 138
 139     append: INSERTION(function(node) {
 140         var last = _.last(this.contents());
 141         if(last && last.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
 142             last.setText(last.getText() + node.getText());
 143             node.detach();
 144             return last;
 145         } else {
 146             this._$.append(node.nativeNode);
 147             return node;
 148         }
 149     }),
 150
 151     prepend: INSERTION(function(node) {
 152         var first = this.contents()[0];
 153         if(first && first.nodeType === Node.TEXT_NODE && node.nodeType === Node.TEXT_NODE) {
 154             first.setText(node.getText() + first.getText());
 155             node.detach();
 156             return first;
 157         } else {
 158             this._$.prepend(node.nativeNode);
 159             return node;
 160         }
 161     }),
 162
 163     insertAtIndex: function(nativeNode, index) {
 164         var contents = this.contents();
 165         if(index < contents.length) {
 166             return contents[index].before(nativeNode);
 167         } else if(index === contents.length) {
 168             return this.append(nativeNode);
 169         }
 170     },
 171
 172     unwrapContent: function() {
 173         var parent = this.parent();
 174         if(!parent) {
 175             return;
 176         }
 177
 178         var myContents = this.contents(),
 179             myIdx = parent.indexOf(this);
 180
 181
 182         if(myContents.length === 0) {
 183             return this.detach();
 184         }
 185
 186
 187         var childrenLength = this.contents().length,
 188             first = true,
 189             shiftRange = false;
 190         this.contents().forEach(function(child) {
 191             var returned = this.before(child);
 192             if(first && !(returned.sameNode(child))) {
 193                 shiftRange = true;
 194                 first = false;
 195             }
 196         }.bind(this));
 197
 198         this.detach();
 199
 200         return {
 201             element1: parent.contents()[myIdx + (shiftRange ? -1 : 0)],
 202             element2: parent.contents()[myIdx + childrenLength-1 + (shiftRange ? -1 : 0)]
 203         };
 204     },
 205
 206     wrapText: function(params) {
 207         return this.document._wrapText(_.extend({inside: this}, params));
 208     }
 209 };
 210
 211 var textNodeTransformations = {
 212     setText: {
 213         impl: function(t, text) {
 214             t.oldText = this.getText();
 215             this.nativeNode.data = text;
 216             this.triggerTextChangeEvent();
 217         },
 218         undo: function(t) {
 219             this.setText(t.oldText);
 220         }
 221     },
 222
 223     before: INSERTION(function(node) {
 224         if(node.nodeType === Node.TEXT_NODE) {
 225             this.prependText(node.getText());
 226             node.detach();
 227             return this;
 228         } else {
 229             return this.__super__.before(node, {silent:true});
 230         }
 231     }),
 232
 233     after: INSERTION(function(node) {
 234         if(node.nodeType === Node.TEXT_NODE) {
 235             this.appendText(node.getText());
 236             node.detach();
 237             return this;
 238         } else {
 239             return this.__super__.after(node, {silent:true});
 240         }
 241     }),
 242
 243     append: function(node) {
 244         if(node.nodeType === Node.TEXT_NODE) {
 245             this.appendText(node.getText());
 246             node.detach();
 247             return this;
 248         }
 249     },
 250     prepend: function(node) {
 251         if(node.nodeType === Node.TEXT_NODE) {
 252             this.prependText(node.getText());
 253             node.detach();
 254             return this;
 255         }
 256     },
 257
 258     appendText: function(text) {
 259         this.nativeNode.data = this.nativeNode.data + text;
 260         this.triggerTextChangeEvent();
 261     },
 262
 263     prependText: function(text) {
 264         this.nativeNode.data = text + this.nativeNode.data;
 265         this.triggerTextChangeEvent();
 266     },
 267
 268     wrapWith: function(desc) {
 269         if(typeof desc.start === 'number' && typeof desc.end === 'number') {
 270             return this.document._wrapText({
 271                 inside: this.parent(),
 272                 textNodeIdx: this.parent().indexOf(this),
 273                 offsetStart: Math.min(desc.start, desc.end),
 274                 offsetEnd: Math.max(desc.start, desc.end),
 275                 _with: {tagName: desc.tagName, attrs: desc.attrs}
 276             });
 277         } else {
 278             return this.__super__.wrapWith.call(this, desc);
 279         }
 280     },
 281
 282     split: function(params) {
 283         var parentElement = this.parent(),
 284             passed = false,
 285             succeedingChildren = [],
 286             prefix = this.getText().substr(0, params.offset),
 287             suffix = this.getText().substr(params.offset);
 288
 289         parentElement.contents().forEach(function(child) {
 290             if(passed) {
 291                 succeedingChildren.push(child);
 292             }
 293             if(child.sameNode(this)) {
 294                 passed = true;
 295             }
 296         }.bind(this));
 297
 298         if(prefix.length > 0) {
 299             this.setText(prefix);
 300         }
 301         else {
 302             this.detach();
 303         }
 304
 305         var attrs = {};
 306         parentElement.getAttrs().forEach(function(attr) {attrs[attr.name] = attr.value; });
 307         var newElement = this.document.createDocumentNode({tagName: parentElement.getTagName(), attrs: attrs});
 308         parentElement.after(newElement);
 309
 310         if(suffix.length > 0) {
 311             newElement.append({text: suffix});
 312         }
 313         succeedingChildren.forEach(function(child) {
 314             newElement.append(child);
 315         });
 316
 317         return {first: parentElement, second: newElement};
 318     },
 319
 320     divideWithElementNode: function(node, params) {
 321         var insertion = this.getNodeInsertion(node),
 322             myText = this.getText();
 323
 324         if(params.offset === myText.length) {
 325             return this.after(node);
 326         }
 327         if(params.offset === 0) {
 328             return this.before(node);
 329         }
 330
 331         var lhsText = myText.substr(0, params.offset),
 332             rhsText = myText.substr(params.offset),
 333             rhsTextNode = this.document.createDocumentNode({text: rhsText});
 334
 335         this.setText(lhsText);
 336         this.after(insertion.ofNode);
 337         insertion.ofNode.after(rhsTextNode);
 338         return insertion.ofNode;
 339     }
 340 };
 341
 342 var documentTransformations = {
 343     wrapNodes: function(params) {
 344         if(!(params.node1.parent().sameNode(params.node2.parent()))) {
 345             throw new Error('Wrapping non-sibling nodes not supported.');
 346         }
 347
 348         var parent = params.node1.parent(),
 349             parentContents = parent.contents(),
 350             wrapper = this.createDocumentNode({
 351                 tagName: params._with.tagName,
 352                 attrs: params._with.attrs}),
 353             idx1 = parent.indexOf(params.node1),
 354             idx2 = parent.indexOf(params.node2);
 355
 356         if(idx1 > idx2) {
 357             var tmp = idx1;
 358             idx1 = idx2;
 359             idx2 = tmp;
 360         }
 361
 362         var insertingMethod, insertingTarget;
 363         if(idx1 === 0) {
 364             insertingMethod = 'prepend';
 365             insertingTarget = parent;
 366         } else {
 367             insertingMethod = 'after';
 368             insertingTarget = parentContents[idx1-1];
 369         }
 370
 371         for(var i = idx1; i <= idx2; i++) {
 372             wrapper.append(parentContents[i].detach());
 373         }
 374
 375         insertingTarget[insertingMethod](wrapper);
 376         return wrapper;
 377     },
 378
 379     _wrapText: function(params) {
 380         params = _.extend({textNodeIdx: 0}, params);
 381         if(typeof params.textNodeIdx === 'number') {
 382             params.textNodeIdx = [params.textNodeIdx];
 383         }
 384
 385         var contentsInside = params.inside.contents(),
 386             idx1 = Math.min.apply(Math, params.textNodeIdx),
 387             idx2 = Math.max.apply(Math, params.textNodeIdx),
 388             textNode1 = contentsInside[idx1],
 389             textNode2 = contentsInside[idx2],
 390             sameNode = textNode1.sameNode(textNode2),
 391             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
 392             prefixInside = textNode1.getText().substr(params.offsetStart),
 393             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
 394             suffixOutside = textNode2.getText().substr(params.offsetEnd)
 395         ;
 396
 397         if(!(textNode1.parent().sameNode(textNode2.parent()))) {
 398             throw new Error('Wrapping text in non-sibling text nodes not supported.');
 399         }
 400
 401         var wrapperElement = this.createDocumentNode({tagName: params._with.tagName, attrs: params._with.attrs});
 402         textNode1.after(wrapperElement);
 403         textNode1.detach();
 404
 405         if(prefixOutside.length > 0) {
 406             wrapperElement.before({text:prefixOutside});
 407         }
 408         if(sameNode) {
 409             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 410             wrapperElement.append({text: core});
 411         } else {
 412             textNode2.detach();
 413             if(prefixInside.length > 0) {
 414                 wrapperElement.append({text: prefixInside});
 415             }
 416             for(var i = idx1 + 1; i < idx2; i++) {
 417                 wrapperElement.append(contentsInside[i]);
 418             }
 419             if(suffixInside.length > 0) {
 420                 wrapperElement.append({text: suffixInside});
 421             }
 422         }
 423         if(suffixOutside.length > 0) {
 424             wrapperElement.after({text: suffixOutside});
 425         }
 426         return wrapperElement;
 427     },
 428     replaceRoot: function(node) {
 429         var insertion = this.getNodeInsertion(node);
 430         this.root.detach();
 431         this._defineDocumentProperties(insertion.ofNode._$);
 432         insertion.ofNode.triggerChangeEvent('nodeAdded');
 433         return insertion.ofNode;
 434     }
 435 };
 436
 437 return {
 438     document: {
 439         transformations: documentTransformations
 440     },
 441     documentNode: {
 442         transformations: documentNodeTransformations
 443     },
 444     elementNode: {
 445         transformations: elementNodeTransformations
 446     },
 447     textNode: {
 448         transformations: textNodeTransformations
 449     }
 450 };
 451
 452 });