src/smartxml/core.js

   1 define(function(require) {
   2
   3 'use strict';
   4 /* globals Node */
   5
   6 var _ = require('libs/underscore'),
   7     TEXT_NODE = Node.TEXT_NODE;
   8
   9
  10 var INSERTION = function(implementation) {
  11     var toret = function(node) {
  12         var insertion = this.getNodeInsertion(node),
  13             nodeWasContained = this.document.containsNode(insertion.ofNode),
  14             nodeParent;
  15         if(!(this.document.containsNode(this))) {
  16             nodeParent = insertion.ofNode.parent();
  17         }
  18         implementation.call(this, insertion.ofNode.nativeNode);
  19         this.triggerChangeEvent(insertion.insertsNew ? 'nodeAdded' : 'nodeMoved', {node: insertion.ofNode}, nodeParent, nodeWasContained);
  20         return insertion.ofNode;
  21     };
  22     return toret;
  23 };
  24
  25 var documentNodeTransformations = {
  26     detach: function() {
  27         var parent = this.parent();
  28         this._$.detach();
  29         this.triggerChangeEvent('nodeDetached', {parent: parent});
  30         return this;
  31     },
  32
  33     replaceWith: function(node) {
  34         var toret;
  35         if(this.isRoot()) {
  36             return this.document.replaceRoot(node);
  37         }
  38         toret = this.after(node);
  39         this.detach();
  40         return toret;
  41     },
  42
  43     after: INSERTION(function(nativeNode) {
  44         return this._$.after(nativeNode);
  45     }),
  46
  47     before: INSERTION(function(nativeNode) {
  48         return this._$.before(nativeNode);
  49     }),
  50
  51     wrapWith: function(node) {
  52         var insertion = this.getNodeInsertion(node);
  53         if(this.parent()) {
  54             this.before(insertion.ofNode);
  55         }
  56         insertion.ofNode.append(this);
  57         return insertion.ofNode;
  58     },
  59
  60     /**
  61     * Removes parent of a node if node has no siblings.
  62     */
  63     unwrap: function() {
  64         if(this.isRoot()) {
  65             return;
  66         }
  67         var parent = this.parent(),
  68             grandParent;
  69         if(parent.contents().length === 1) {
  70             grandParent = parent.parent();
  71             parent.unwrapContent();
  72             return grandParent;
  73         }
  74     }
  75 };
  76
  77 var elementNodeTransformations = {
  78
  79     detach: function() {
  80         var next;
  81         if(this.parent() && this.isSurroundedByTextElements()) {
  82             next = this.next();
  83             this.prev().appendText(next.getText());
  84             next.detach();
  85         }
  86         return this.__super__.detach();
  87     },
  88
  89     setTag: function(tagName) {
  90         var node = this.document.createDocumentNode({tagName: tagName}),
  91             oldTagName = this.getTagName(),
  92             myContents = this._$.contents();
  93
  94         this.getAttrs().forEach(function(attribute) {
  95             node.setAttr(attribute.name, attribute.value, true);
  96         });
  97         node.setData(this.getData());
  98
  99         if(this.sameNode(this.document.root)) {
 100             this.document._defineDocumentProperties(node._$);
 101         }
 102         this._$.replaceWith(node._$);
 103         this._setNativeNode(node._$[0]);
 104         this._$.append(myContents);
 105         this.triggerChangeEvent('nodeTagChange', {oldTagName: oldTagName, newTagName: this.getTagName()});
 106     },
 107
 108
 109     setAttr: function(name, value, silent) {
 110         var oldVal = this.getAttr(name);
 111         this._$.attr(name, value);
 112         if(!silent) {
 113             this.triggerChangeEvent('nodeAttrChange', {attr: name, oldVal: oldVal, newVal: value});
 114         }
 115     },
 116
 117     append: INSERTION(function(nativeNode) {
 118         this._$.append(nativeNode);
 119     }),
 120
 121     prepend: INSERTION(function(nativeNode) {
 122         this._$.prepend(nativeNode);
 123     }),
 124
 125     insertAtIndex: function(nativeNode, index) {
 126         var contents = this.contents();
 127         if(index < contents.length) {
 128             return contents[index].before(nativeNode);
 129         } else if(index === contents.length) {
 130             return this.append(nativeNode);
 131         }
 132     },
 133
 134     unwrapContent: function() {
 135         var parent = this.parent();
 136         if(!parent) {
 137             return;
 138         }
 139
 140         var myContents = this.contents(),
 141             myIdx = parent.indexOf(this);
 142
 143
 144         if(myContents.length === 0) {
 145             return this.detach();
 146         }
 147
 148         var prev = this.prev(),
 149             next = this.next(),
 150             moveLeftRange, moveRightRange, leftMerged;
 151
 152         if(prev && (prev.nodeType === TEXT_NODE) && (myContents[0].nodeType === TEXT_NODE)) {
 153             prev.appendText(myContents[0].getText());
 154             myContents[0].detach();
 155             moveLeftRange = true;
 156             leftMerged = true;
 157         } else {
 158             leftMerged = false;
 159         }
 160
 161         if(!(leftMerged && myContents.length === 1)) {
 162             var lastContents = _.last(myContents);
 163             if(next && (next.nodeType === TEXT_NODE) && (lastContents.nodeType === TEXT_NODE)) {
 164                 next.prependText(lastContents.getText());
 165                 lastContents.detach();
 166                 moveRightRange = true;
 167             }
 168         }
 169
 170         var childrenLength = this.contents().length;
 171         this.contents().forEach(function(child) {
 172             this.before(child);
 173         }.bind(this));
 174
 175         this.detach();
 176
 177         return {
 178             element1: parent.contents()[myIdx + (moveLeftRange ? -1 : 0)],
 179             element2: parent.contents()[myIdx + childrenLength-1 + (moveRightRange ? 1 : 0)]
 180         };
 181     },
 182
 183     wrapText: function(params) {
 184         return this.document._wrapText(_.extend({inside: this}, params));
 185     }
 186 };
 187
 188 var textNodeTransformations = {
 189     setText: function(text) {
 190         this.nativeNode.data = text;
 191         this.triggerTextChangeEvent();
 192     },
 193
 194     appendText: function(text) {
 195         this.nativeNode.data = this.nativeNode.data + text;
 196         this.triggerTextChangeEvent();
 197     },
 198
 199     prependText: function(text) {
 200         this.nativeNode.data = text + this.nativeNode.data;
 201         this.triggerTextChangeEvent();
 202     },
 203
 204     wrapWith: function(desc) {
 205         if(typeof desc.start === 'number' && typeof desc.end === 'number') {
 206             return this.document._wrapText({
 207                 inside: this.parent(),
 208                 textNodeIdx: this.parent().indexOf(this),
 209                 offsetStart: Math.min(desc.start, desc.end),
 210                 offsetEnd: Math.max(desc.start, desc.end),
 211                 _with: {tagName: desc.tagName, attrs: desc.attrs}
 212             });
 213         } else {
 214             return this.__super__.wrapWith.call(this, desc);
 215         }
 216     },
 217
 218     split: function(params) {
 219         var parentElement = this.parent(),
 220             passed = false,
 221             succeedingChildren = [],
 222             prefix = this.getText().substr(0, params.offset),
 223             suffix = this.getText().substr(params.offset);
 224
 225         parentElement.contents().forEach(function(child) {
 226             if(passed) {
 227                 succeedingChildren.push(child);
 228             }
 229             if(child.sameNode(this)) {
 230                 passed = true;
 231             }
 232         }.bind(this));
 233
 234         if(prefix.length > 0) {
 235             this.setText(prefix);
 236         }
 237         else {
 238             this.detach();
 239         }
 240
 241         var attrs = {};
 242         parentElement.getAttrs().forEach(function(attr) {attrs[attr.name] = attr.value; });
 243         var newElement = this.document.createDocumentNode({tagName: parentElement.getTagName(), attrs: attrs});
 244         parentElement.after(newElement);
 245
 246         if(suffix.length > 0) {
 247             newElement.append({text: suffix});
 248         }
 249         succeedingChildren.forEach(function(child) {
 250             newElement.append(child);
 251         });
 252
 253         return {first: parentElement, second: newElement};
 254     },
 255
 256     divideWithElementNode: function(node, params) {
 257         var insertion = this.getNodeInsertion(node),
 258             myText = this.getText();
 259
 260         if(params.offset === myText.length) {
 261             return this.after(node);
 262         }
 263         if(params.offset === 0) {
 264             return this.before(node);
 265         }
 266
 267         var lhsText = myText.substr(0, params.offset),
 268             rhsText = myText.substr(params.offset),
 269             rhsTextNode = this.document.createDocumentNode({text: rhsText});
 270
 271         this.setText(lhsText);
 272         this.after(insertion.ofNode);
 273         insertion.ofNode.after(rhsTextNode);
 274         return insertion.ofNode;
 275     }
 276 };
 277
 278 var documentTransformations = {
 279     wrapNodes: function(params) {
 280         if(!(params.node1.parent().sameNode(params.node2.parent()))) {
 281             throw new Error('Wrapping non-sibling nodes not supported.');
 282         }
 283
 284         var parent = params.node1.parent(),
 285             parentContents = parent.contents(),
 286             wrapper = this.createDocumentNode({
 287                 tagName: params._with.tagName,
 288                 attrs: params._with.attrs}),
 289             idx1 = parent.indexOf(params.node1),
 290             idx2 = parent.indexOf(params.node2);
 291
 292         if(idx1 > idx2) {
 293             var tmp = idx1;
 294             idx1 = idx2;
 295             idx2 = tmp;
 296         }
 297
 298         var insertingMethod, insertingTarget;
 299         if(idx1 === 0) {
 300             insertingMethod = 'prepend';
 301             insertingTarget = parent;
 302         } else {
 303             insertingMethod = 'after';
 304             insertingTarget = parentContents[idx1-1];
 305         }
 306
 307         for(var i = idx1; i <= idx2; i++) {
 308             wrapper.append(parentContents[i].detach());
 309         }
 310
 311         insertingTarget[insertingMethod](wrapper);
 312         return wrapper;
 313     },
 314
 315     _wrapText: function(params) {
 316         params = _.extend({textNodeIdx: 0}, params);
 317         if(typeof params.textNodeIdx === 'number') {
 318             params.textNodeIdx = [params.textNodeIdx];
 319         }
 320
 321         var contentsInside = params.inside.contents(),
 322             idx1 = Math.min.apply(Math, params.textNodeIdx),
 323             idx2 = Math.max.apply(Math, params.textNodeIdx),
 324             textNode1 = contentsInside[idx1],
 325             textNode2 = contentsInside[idx2],
 326             sameNode = textNode1.sameNode(textNode2),
 327             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
 328             prefixInside = textNode1.getText().substr(params.offsetStart),
 329             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
 330             suffixOutside = textNode2.getText().substr(params.offsetEnd)
 331         ;
 332
 333         if(!(textNode1.parent().sameNode(textNode2.parent()))) {
 334             throw new Error('Wrapping text in non-sibling text nodes not supported.');
 335         }
 336
 337         var wrapperElement = this.createDocumentNode({tagName: params._with.tagName, attrs: params._with.attrs});
 338         textNode1.after(wrapperElement);
 339         textNode1.detach();
 340
 341         if(prefixOutside.length > 0) {
 342             wrapperElement.before({text:prefixOutside});
 343         }
 344         if(sameNode) {
 345             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
 346             wrapperElement.append({text: core});
 347         } else {
 348             textNode2.detach();
 349             if(prefixInside.length > 0) {
 350                 wrapperElement.append({text: prefixInside});
 351             }
 352             for(var i = idx1 + 1; i < idx2; i++) {
 353                 wrapperElement.append(contentsInside[i]);
 354             }
 355             if(suffixInside.length > 0) {
 356                 wrapperElement.append({text: suffixInside});
 357             }
 358         }
 359         if(suffixOutside.length > 0) {
 360             wrapperElement.after({text: suffixOutside});
 361         }
 362         return wrapperElement;
 363     },
 364     replaceRoot: function(node) {
 365         var insertion = this.getNodeInsertion(node);
 366         this.root.detach();
 367         this._defineDocumentProperties(insertion.ofNode._$);
 368         insertion.ofNode.triggerChangeEvent('nodeAdded');
 369         return insertion.ofNode;
 370     }
 371 };
 372
 373 return {
 374     document: {
 375         transformations: documentTransformations
 376     },
 377     documentNode: {
 378         transformations: documentNodeTransformations
 379     },
 380     elementNode: {
 381         transformations: elementNodeTransformations
 382     },
 383     textNode: {
 384         transformations: textNodeTransformations
 385     }
 386 };
 387
 388 });