src/wlxml/wlxml.js

   1 define([
   2     'libs/jquery',
   3     'libs/underscore',
   4     'smartxml/smartxml',
   5     'smartxml/transformations'
   6 ], function($, _, smartxml, transformations) {
   7
   8 'use strict';
   9
  10 // utils
  11
  12 var isMetaAttribute = function(attrName) {
  13     return attrName.substr(0, 5) === 'meta-';
  14 };
  15
  16 //
  17
  18 var AttributesList = function() {};
  19 AttributesList.prototype = Object.create({});
  20 AttributesList.prototype.keys = function() {
  21     return _.keys(this);
  22 };
  23
  24 var installObject = function(instance, klass) {
  25     var methods = instance.document.classMethods[klass] || instance.document.classTransformations;
  26     if(methods) {
  27         instance.object = Object.create(_.extend({
  28             transform: function(name, args) {
  29                 // TODO: refactor with DocumentElement.transform
  30                 var Transformation = instance.document.classTransformations[klass].get(name),
  31                     transformation;
  32                 if(Transformation) {
  33                     transformation = new Transformation(instance.document, instance, args);
  34                 }
  35                 return instance.document.transform(transformation);
  36             }
  37         }, methods));
  38         _.keys(methods).forEach(function(key) {
  39             instance.object[key] = _.bind(instance.object[key], instance);
  40         });
  41     }
  42 }
  43
  44 var WLXMLElementNode = function(nativeNode, document) {
  45     smartxml.ElementNode.call(this, nativeNode, document);
  46     installObject(this, this.getClass());
  47 };
  48 WLXMLElementNode.prototype = Object.create(smartxml.ElementNode.prototype);
  49
  50 $.extend(WLXMLElementNode.prototype, smartxml.ElementNode.prototype, {
  51     getClass: function() {
  52         return this.getAttr('class') || '';
  53     },
  54     setClass: function(klass) {
  55         var methods, object;
  56         if(klass !== this.klass) {
  57             installObject(this, klass);
  58             return this.setAttr('class', klass);
  59         }
  60     },
  61     is: function(klass) {
  62         return this.getClass().substr(0, klass.length) === klass;
  63     },
  64     getMetaAttributes: function() {
  65         var toret = new AttributesList(),
  66             classParts = [''].concat(this.getClass().split('.')),
  67             classCurrent, classDesc;
  68
  69         classParts.forEach(function(part) {
  70             classCurrent = classCurrent ? classCurrent + '.' + part : part;
  71             classDesc = this.document.options.wlxmlClasses[classCurrent];
  72             if(classDesc) {
  73                 _.keys(classDesc.attrs).forEach(function(attrName) {
  74                     toret[attrName] = _.extend({value: this.getAttr('meta-' + attrName)}, classDesc.attrs[attrName]);
  75                 }.bind(this));
  76             }
  77         }.bind(this));
  78         return toret;
  79     },
  80     setMetaAttribute: function(key, value) {
  81         this.setAttr('meta-'+key, value);
  82     },
  83     getOtherAttributes: function() {
  84         var toret = {};
  85         this.getAttrs().forEach(function(attr) {
  86             if(attr.name !== 'class' && !isMetaAttribute(attr.name)) {
  87                 toret[attr.name] = attr.value;
  88             }
  89         });
  90         return toret;
  91     },
  92
  93     _getXMLDOMToDump: function() {
  94         var DOM = this._$.clone(true, true);
  95
  96         DOM.find('*').addBack().each(function() {
  97             var el = $(this),
  98                 parent = el.parent(),
  99                 contents = parent.contents(),
 100                 idx = contents.index(el),
 101                 data = el.data();
 102
 103
 104             var txt;
 105
 106             if(data[formatter_prefix+ 'orig_before']) {
 107                 txt = idx > 0 && contents[idx-1].nodeType === Node.TEXT_NODE ? contents[idx-1] : null;
 108                 if(txt && txt.data === data[formatter_prefix + 'orig_before_transformed']) {
 109                     txt.data = data[formatter_prefix+ 'orig_before_original'];
 110                 } else {
 111                     el.before(data[formatter_prefix+ 'orig_before']);
 112                 }
 113             }
 114             if(data[formatter_prefix+ 'orig_after']) {
 115                 txt = idx < contents.length-1 && contents[idx+1].nodeType === Node.TEXT_NODE ? contents[idx+1] : null;
 116                 if(txt && txt.data === data[formatter_prefix + 'orig_after_transformed']) {
 117                     txt.data = data[formatter_prefix+ 'orig_after_original'];
 118                 } else {
 119                     el.after(data[formatter_prefix+ 'orig_after']);
 120                 }
 121             }
 122             if(data[formatter_prefix+ 'orig_begin']) {
 123                 el.prepend(data[formatter_prefix+ 'orig_begin']);
 124             }
 125             if(data[formatter_prefix+ 'orig_end']) {
 126                 contents = el.contents();
 127                 txt = (contents.length && contents[contents.length-1].nodeType === Node.TEXT_NODE) ? contents[contents.length-1] : null;
 128                 if(txt && txt.data === data[formatter_prefix + 'orig_end_transformed']) {
 129                     txt.data = data[formatter_prefix+ 'orig_end_original'];
 130                 } else {
 131                     el.append(data[formatter_prefix+ 'orig_end']);
 132                 }
 133             }
 134         });
 135
 136         return DOM;
 137     }
 138 });
 139
 140 WLXMLElementNode.prototype.transformations.register(transformations.createContextTransformation({
 141     name: 'wlxml.setMetaAttribute',
 142     impl: function(args) {
 143         this.setMetaAttribute(args.name, args.value);
 144     },
 145     getChangeRoot: function() {
 146         return this.context;
 147     }
 148 }));
 149
 150
 151
 152 var WLXMLDocumentNode = function() {
 153     smartxml.DocumentNode.apply(this, arguments);
 154 }
 155 WLXMLDocumentNode.prototype = Object.create(smartxml.DocumentNode.prototype);
 156
 157 var WLXMLDocument = function(xml, options) {
 158     smartxml.Document.call(this, xml);
 159     this.options = options;
 160
 161     // this.DocumentNodeFactory = function() {
 162     //     WLXMLDocumentNode.apply(this, arguments);
 163     // };
 164
 165     // this.DocumentNodeFactory.prototype = Object.create(WLXMLDocumentNode.prototype);
 166
 167     this.ElementNodeFactory = function() {
 168         WLXMLElementNode.apply(this, arguments);
 169     }
 170     this.ElementNodeFactory.prototype = Object.create(WLXMLElementNode.prototype);
 171     this.ElementNodeFactory.prototype.transformations = new transformations.TransformationStorage();
 172     this.ElementNodeFactory.prototype.registerTransformation = function(Transformation) {
 173         return this.transformations.register(Transformation);
 174     };
 175     this.ElementNodeFactory.prototype.registerMethod = function(methodName, method) {
 176         this[methodName] = method;
 177     };
 178
 179     this.TextNodeFactory = function() {
 180         smartxml.TextNode.apply(this, arguments);
 181     }
 182     this.TextNodeFactory.prototype = Object.create(smartxml.TextNode.prototype);
 183     this.TextNodeFactory.prototype.transformations = new transformations.TransformationStorage();
 184     this.TextNodeFactory.prototype.registerTransformation = function(Transformation) {
 185         return this.transformations.register(Transformation);
 186     };
 187     this.TextNodeFactory.prototype.registerMethod = function(methodName, method) {
 188         this[methodName] = method;
 189     };
 190
 191     this.classMethods = {};
 192     this.classTransformations = {};
 193 };
 194
 195 var formatter_prefix = '_wlxml_formatter_';
 196
 197
 198 WLXMLDocument.prototype = Object.create(smartxml.Document.prototype);
 199 $.extend(WLXMLDocument.prototype, {
 200     ElementNodeFactory: WLXMLElementNode,
 201     loadXML: function(xml) {
 202         smartxml.Document.prototype.loadXML.call(this, xml, {silent: true});
 203         $(this.dom).find(':not(iframe)').addBack().contents()
 204             .filter(function() {return this.nodeType === Node.TEXT_NODE;})
 205             .each(function() {
 206                 var el = $(this),
 207                     text = {original: el.text(), trimmed: $.trim(el.text())},
 208                     elParent = el.parent(),
 209                     hasSpanParent = elParent.prop('tagName') === 'SPAN',
 210                     hasSpanBefore = el.prev().length && $(el.prev()).prop('tagName') === 'SPAN',
 211                     hasSpanAfter = el.next().length && $(el.next()).prop('tagName') === 'SPAN';
 212
 213
 214                 var addInfo = function(toAdd, where, transformed, original) {
 215                     var parentContents = elParent.contents(),
 216                         idx = parentContents.index(el[0]),
 217                         prev = idx > 0 ? parentContents[idx-1] : null,
 218                         next = idx < parentContents.length - 1 ? parentContents[idx+1] : null,
 219                         target, key;
 220
 221                     if(where === 'above') {
 222                         target = prev ? $(prev) : elParent;
 223                         key = prev ? 'orig_after' : 'orig_begin';
 224                     } else if(where === 'below') {
 225                         target = next ? $(next) : elParent;
 226                         key = next ? 'orig_before' : 'orig_end';
 227                     } else { throw new Error();}
 228
 229                     target.data(formatter_prefix + key, toAdd);
 230                     if(transformed !== undefined) {
 231                         target.data(formatter_prefix + key + '_transformed', transformed);
 232                     }
 233                     if(original !== undefined) {
 234                         target.data(formatter_prefix + key + '_original', original);
 235                     }
 236                 };
 237
 238                 text.transformed = text.trimmed;
 239
 240                 if(hasSpanParent || hasSpanBefore || hasSpanAfter) {
 241                     var startSpace = /\s/g.test(text.original.substr(0,1)),
 242                         endSpace = /\s/g.test(text.original.substr(-1)) && text.original.length > 1;
 243                     text.transformed = (startSpace && (hasSpanParent || hasSpanBefore) ? ' ' : '');
 244                     text.transformed += text.trimmed;
 245                     text.transformed += (endSpace && (hasSpanParent || hasSpanAfter) ? ' ' : '');
 246                 } else {
 247                     if(text.trimmed.length === 0 && text.original.length > 0 && elParent.contents().length === 1) {
 248                         text.transformed = ' ';
 249                     }
 250                 }
 251
 252                 if(!text.transformed) {
 253                     addInfo(text.original, 'below');
 254                     el.remove();
 255                     return true; // continue
 256                 }
 257
 258                 if(text.transformed !== text.original) {
 259                     // if(!text.trimmed) {
 260                     //     addInfo(text.original, 'below');
 261                     // } else {
 262                         var startingMatch = text.original.match(/^\s+/g),
 263                             endingMatch = text.original.match(/\s+$/g),
 264                             startingWhiteSpace = startingMatch ? startingMatch[0] : null,
 265                             endingWhiteSpace = endingMatch ? endingMatch[0] : null;
 266
 267                         if(endingWhiteSpace) {
 268                             if(text.transformed[text.transformed.length - 1] === ' ' && endingWhiteSpace[0] === ' ') {
 269                                 endingWhiteSpace = endingWhiteSpace.substr(1);
 270                             }
 271                             addInfo(endingWhiteSpace, 'below', !text.trimmed ? text.transformed : undefined, !text.trimmed ? text.original : undefined);
 272                         }
 273
 274                         if(startingWhiteSpace && text.trimmed) {
 275                             if(text.transformed[0] === ' ' && startingWhiteSpace[startingWhiteSpace.length-1] === ' ') {
 276                                 startingWhiteSpace = startingWhiteSpace.substr(0, startingWhiteSpace.length -1);
 277                             }
 278                             addInfo(startingWhiteSpace, 'above', !text.trimmed ? text.transformed : undefined, !text.trimmed ? text.original : undefined);
 279                         }
 280                     //}
 281                 }
 282
 283                 el.replaceWith(document.createTextNode(text.transformed));
 284             });
 285         this.trigger('contentSet');
 286     },
 287
 288     registerMethod: function(methodName, method) {
 289         this[methodName] = method;
 290     },
 291
 292     registerTransformation: function(Transformation) {
 293         return this.transformations.register(Transformation);
 294     },
 295
 296     registerClassTransformation: function(Transformation, className) {
 297         var thisClassTransformations = (this.classTransformations[className] = this.classTransformations[className] || new transformations.TransformationStorage());
 298         return thisClassTransformations.register(Transformation);
 299     },
 300
 301     registerClassMethod: function(methodName, method, className) {
 302         var thisClassMethods = (this.classMethods[className] = this.classMethods[className] || {});
 303         thisClassMethods[methodName] = method;
 304     },
 305
 306     registerExtension: function(extension) {
 307         //debugger;
 308         var doc = this,
 309             existingPropertyNames = _.values(this);
 310
 311         var getTrans = function(desc, methodName) {
 312             if(typeof desc === 'function') {
 313                 desc = {impl: desc};
 314             }
 315             if(!desc.impl) {
 316                 throw new Error('Got transformation description without implementation.')
 317             }
 318             desc.name = desc.name || methodName;
 319             return desc;
 320         };
 321
 322         [
 323             {source: extension.document, target: doc},
 324             {source: extension.documentNode, target: [doc.ElementNodeFactory.prototype, doc.TextNodeFactory.prototype]},
 325
 326         ].forEach(function(mapping) {
 327             if(mapping.source) {
 328                 if(mapping.source.methods) {
 329                     existingPropertyNames = _.values(mapping.target)
 330                     _.pairs(mapping.source.methods).forEach(function(pair) {
 331                         var methodName = pair[0],
 332                             method = pair[1],
 333                             targets = _.isArray(mapping.target) ? mapping.target : [mapping.target];
 334                         if(_.contains(existingPropertyNames, methodName)) {
 335                             throw new Error('Cannot extend {target} with method name {methodName}. Name already exists.'
 336                                 .replace('{target}', mapping.target)
 337                                 .replace('{methodName}', methodName)
 338                             );
 339                         }
 340                         targets.forEach(function(target) {
 341                             target.registerMethod(methodName, method)
 342                         });
 343                     });
 344                 }
 345
 346                 if(mapping.source.transformations) {
 347                     _.pairs(mapping.source.transformations).forEach(function(pair) {
 348                         var transformation = getTrans(pair[1], pair[0]),
 349                             targets = _.isArray(mapping.target) ? mapping.target : [mapping.target];
 350                         targets.forEach(function(target) {
 351                             target.registerTransformation(transformations.createContextTransformation(transformation));
 352                         });
 353                     });
 354                 }
 355             }
 356         });
 357
 358         _.pairs(extension.wlxmlClass).forEach(function(pair) {
 359             var className = pair[0],
 360                 classExtension = pair[1];
 361
 362             _.pairs(classExtension.methods || {}).forEach(function(pair) {
 363                 var name = pair[0],
 364                     method = pair[1];
 365                 doc.registerClassMethod(name, method, className);
 366             });
 367
 368             _.pairs(classExtension.transformations || {}).forEach(function(pair) {
 369                 var transformation = getTrans(pair[1], pair[0]);
 370                 doc.registerClassTransformation(transformations.createContextTransformation(transformation), className);
 371             });
 372         });
 373
 374     }
 375
 376 });
 377
 378 var wlxmlClasses = {
 379     'uri': {
 380         attrs: {uri: {type: 'string'}}
 381     }
 382 };
 383
 384
 385 return {
 386     WLXMLDocumentFromXML: function(xml, options) {
 387         options = _.extend({wlxmlClasses: wlxmlClasses}, options);
 388         return new WLXMLDocument(xml, options);
 389     },
 390
 391     WLXMLElementNodeFromXML: function(xml) {
 392         return this.WLXMLDocumentFromXML(xml).root;
 393     }
 394 };
 395
 396 });