redakcja/static/js/wiki/xslt.js

   1 /*
   2  *
   3  * XSLT STUFF
   4  *
   5  */
   6 function createXSLT(xsl) {
   7     var p = new XSLTProcessor();
   8     p.importStylesheet(xsl);
   9     return p;
  10 }
  11
  12 var xml2htmlStylesheet = null;
  13
  14 // Wykonuje block z załadowanymi arkuszami stylów
  15 function withStylesheets(code_block, onError)
  16 {
  17     if (!xml2htmlStylesheet) {
  18         $.blockUI({message: 'Ładowanie arkuszy stylów...'});
  19         $.ajax({
  20                 url: STATIC_URL + 'xsl/wl2html_client.xsl?20110112',
  21                 dataType: 'xml',
  22                 timeout: 10000,
  23                 success: function(data) {
  24                 xml2htmlStylesheet = createXSLT(data);
  25                 $.unblockUI();
  26                                 code_block();
  27
  28             },
  29                         error: onError
  30         })
  31     }
  32         else {
  33                 code_block();
  34         }
  35 }
  36
  37
  38 // Wykonuje block z załadowanymi kanonicznymi motywami
  39 function withThemes(code_block, onError)
  40 {
  41     if (typeof withThemes.canon == 'undefined') {
  42         $.ajax({
  43             url: '/themes',
  44             dataType: 'text',
  45             success: function(data) {
  46                 withThemes.canon = data.split('\n');
  47                 code_block(withThemes.canon);
  48             },
  49             error: function() {
  50                 withThemes.canon = null;
  51                 code_block(withThemes.canon);
  52             }
  53         })
  54     }
  55     else {
  56         code_block(withThemes.canon);
  57     }
  58 }
  59
  60
  61 function xml2html(options) {
  62     withStylesheets(function() {
  63         var xml = options.xml.replace(/\/(\s+)/g, '<br />$1');
  64         xml = xml.replace(/([^a-zA-Z0-9ąćęłńóśźżĄĆĘŁŃÓŚŹŻ\s<>«»\\*_!,:;?&%."'=#()\/-]+)/g, '<alien>$1</alien>');
  65         var parser = new DOMParser();
  66         var serializer = new XMLSerializer();
  67         var doc = parser.parseFromString(xml, 'text/xml');
  68         var error = $('parsererror', doc);
  69
  70         if (error.length == 0) {
  71             doc = xml2htmlStylesheet.transformToFragment(doc, document);
  72             console.log(doc.firstChild);
  73
  74         if(doc.firstChild === null) {
  75             options.error("Błąd w przetwarzaniu XML.");
  76                 return;
  77             }
  78
  79             error = $('parsererror', doc);
  80         }
  81
  82         if (error.length > 0 && options.error) {
  83             source = $('sourcetext', doc);
  84             source_text = source.text();
  85             source.text('');
  86             options.error(error.text(), source_text);
  87         } else {
  88             options.success(doc.firstChild);
  89
  90             withThemes(function(canonThemes) {
  91                 if (canonThemes != null) {
  92                     $('.theme-text-list').addClass('canon').each(function(){
  93                         var themes = $(this).html().split(',');
  94                         for (i in themes) {
  95                             themes[i] = $.trim(themes[i]);
  96                             if (canonThemes.indexOf(themes[i]) == -1)
  97                                 themes[i] = '<span x-pass-thru="true" class="noncanon">' + themes[i] + "</span>"
  98                         }
  99                         $(this).html(themes.join(', '));
 100                     });
 101                 }
 102             });
 103         }
 104     }, function() { options.error && options.error('Nie udało się załadować XSLT'); });
 105 }
 106
 107 /* USEFULL CONSTANTS */
 108 const ELEMENT_NODE                                       = 1;
 109 const ATTRIBUTE_NODE                 = 2;
 110 const TEXT_NODE                      = 3;
 111 const CDATA_SECTION_NODE             = 4;
 112 const ENTITY_REFERENCE_NODE          = 5;
 113 const ENTITY_NODE                    = 6;
 114 const PROCESSING_INSTRUCTION_NODE    = 7;
 115 const COMMENT_NODE                   = 8;
 116 const DOCUMENT_NODE                  = 9;
 117 const DOCUMENT_TYPE_NODE             = 10;
 118 const DOCUMENT_FRAGMENT_NODE         = 11;
 119 const NOTATION_NODE                  = 12;
 120 const XATTR_RE = /^x-attr-name-(.*)$/;
 121
 122 const ELEM_START = 1;
 123 const ELEM_END = 2;
 124 const NS_END = 3;
 125
 126 const NAMESPACES = {
 127         // namespaces not listed here will be assigned random names
 128         "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
 129         "http://purl.org/dc/elements/1.1/": "dc",
 130         "http://www.w3.org/XML/1998/namespace": "xml"
 131 };
 132
 133 function HTMLSerializer() {
 134         // empty constructor
 135 }
 136
 137
 138
 139 HTMLSerializer.prototype._prepare = function() {
 140         this.stack = [];
 141
 142         // XML namespace is implicit
 143         this.nsMap = {"http://www.w3.org/XML/1998/namespace": "xml"};
 144
 145         this.result = "";
 146         this.nsCounter = 1;
 147 }
 148
 149 HTMLSerializer.prototype._pushElement = function(element) {
 150         this.stack.push({
 151                 "type": ELEM_START,
 152                 "node": element
 153         });
 154 }
 155
 156 HTMLSerializer.prototype._pushChildren = function(element) {
 157         for(var i = element.childNodes.length-1; i >= 0; i--)
 158                 this._pushElement(element.childNodes.item(i));
 159 }
 160
 161 HTMLSerializer.prototype._pushTagEnd = function(tagName) {
 162         this.stack.push({
 163                 "type": ELEM_END,
 164                 "tagName": tagName
 165         });
 166 }
 167
 168 HTMLSerializer.prototype._verseBefore = function(node) {
 169     /* true if previous element is a previous verse of a stanza */
 170     var parent = node.parentNode;
 171     if (!parent || !parent.hasAttribute('x-node') || parent.getAttribute('x-node') != 'strofa')
 172         return false;
 173
 174         var prev = node.previousSibling;
 175
 176         while((prev !== null) && (prev.nodeType != ELEMENT_NODE)) {
 177                 prev = prev.previousSibling;
 178         }
 179
 180         return (prev !== null) && prev.hasAttribute('x-verse');
 181 }
 182
 183 HTMLSerializer.prototype._nodeIgnored = function(node) {
 184     return node.getAttribute('x-node') == 'wers';
 185 }
 186
 187 HTMLSerializer.prototype._ignoredWithWhitespace = function(node) {
 188     while (node.nodeType == ELEMENT_NODE && this._nodeIgnored(node) && node.childNodes.length > 0)
 189         node = node.childNodes[0];
 190     if (node.nodeType == TEXT_NODE)
 191         return node.nodeValue.match(/^\s/)
 192     else return false;
 193 }
 194
 195
 196 HTMLSerializer.prototype.serialize = function(rootElement, stripOuter)
 197 {
 198         var self = this;
 199         self._prepare();
 200
 201         if(!stripOuter)
 202                 self._pushElement(rootElement);
 203         else
 204                 self._pushChildren(rootElement);
 205
 206     var text_buffer = '';
 207
 208         while(self.stack.length > 0) {
 209                 var token = self.stack.pop();
 210
 211         if(token.type === ELEM_END) {
 212             self.result += text_buffer;
 213             text_buffer = '';
 214             if (token.tagName != '')
 215                 self.result += "</" + token.tagName + ">";
 216             continue;
 217         };
 218
 219                 if(token.type === NS_END) {
 220                         self._unassignNamespace(token.namespace);
 221                         continue;
 222                 }
 223
 224
 225                 switch(token.node.nodeType) {
 226                         case ELEMENT_NODE:
 227                                 if(token.node.hasAttribute('x-pass-thru')
 228                                  || token.node.hasAttribute('data-pass-thru')) {
 229                                         self._pushChildren(token.node);
 230                                         break;
 231                                 }
 232
 233                                 if(!token.node.hasAttribute('x-node'))
 234                                         break;
 235
 236                                 var xnode = token.node.getAttribute('x-node');
 237
 238                                 if(xnode === 'out-of-flow-text') {
 239                                         self._pushChildren(token.node);
 240                                         break;
 241                                 }
 242
 243                 if(token.node.hasAttribute('x-verse') && self._verseBefore(token.node)) {
 244                     self.result += '/';
 245                     // add whitespace if there's none
 246                     if (!(text_buffer.match(/^\s/) || self._ignoredWithWhitespace(token.node)))
 247                         self.result += ' ';
 248                 }
 249
 250                 self.result += text_buffer;
 251                 text_buffer = '';
 252                                 self._serializeElement(token.node);
 253                                 break;
 254                         case TEXT_NODE:
 255                                 self.result += text_buffer;
 256                                 text_buffer = token.node.nodeValue;
 257                                 break;
 258                 };
 259         };
 260     self.result += text_buffer;
 261
 262         return this.result;
 263 }
 264
 265 /*
 266  * TODO: this doesn't support prefix redefinitions
 267  */
 268 HTMLSerializer.prototype._unassignNamespace = function(nsData) {
 269         this.nsMap[nsData.uri] = undefined;
 270 };
 271
 272 HTMLSerializer.prototype._assignNamespace = function(uri) {
 273         if(uri === null) {
 274                 // default namespace
 275                 return ({"prefix": "", "uri": "", "fresh": false});
 276         }
 277
 278         if(this.nsMap[uri] === undefined) {
 279                 // this prefix hasn't been defined yet in current context
 280                 var prefix = NAMESPACES[uri];
 281
 282                 if (prefix === undefined) { // not predefined
 283                         prefix = "ns" + this.nsCounter;
 284                         this.nsCounter += 1;
 285                 }
 286
 287                 this.nsMap[uri] = prefix;
 288                 return ({
 289                         "prefix": prefix,
 290                         "uri": uri,
 291                         "fresh": true
 292                 });
 293         }
 294
 295         return ({"prefix": this.nsMap[uri], "uri": uri, "fresh": false});
 296 };
 297
 298 HTMLSerializer.prototype._join = function(prefix, name) {
 299         if(!!prefix)
 300                 return prefix + ":" + name;
 301         return name;
 302 };
 303
 304 HTMLSerializer.prototype._rjoin = function(prefix, name) {
 305         if(!!name)
 306                 return prefix + ":" + name;
 307         return prefix;
 308 };
 309
 310 HTMLSerializer.prototype._serializeElement = function(node) {
 311     var self = this;
 312
 313     if (self._nodeIgnored(node)) {
 314         self._pushTagEnd('');
 315         self._pushChildren(node);
 316     }
 317     else {
 318         var ns = node.getAttribute('x-ns');
 319         var nsPrefix = null;
 320         var newNamespaces = [];
 321
 322         var nsData = self._assignNamespace(node.getAttribute('x-ns'));
 323
 324         if(nsData.fresh) {
 325                 newNamespaces.push(nsData);
 326                 self.stack.push({
 327                         "type": NS_END,
 328                         "namespace": nsData
 329                 });
 330         }
 331
 332         var tagName = self._join(nsData.prefix, node.getAttribute('x-node'));
 333
 334         /* retrieve attributes */
 335         var attributeIDs = [];
 336         for (var i = 0; i < node.attributes.length; i++) {
 337                 var attr = node.attributes.item(i);
 338
 339                 // check if name starts with "x-attr-name"
 340                 var m = attr.name.match(XATTR_RE);
 341                 if (m !== null)
 342                         attributeIDs.push(m[1]);
 343         };
 344
 345         /* print out */
 346
 347         self.result += '<' + tagName;
 348
 349         $.each(attributeIDs, function() {
 350                 var nsData = self._assignNamespace(node.getAttribute('x-attr-ns-'+this));
 351
 352                 if(nsData.fresh) {
 353                         newNamespaces.push(nsData);
 354                         self.stack.push({
 355                                 "type": NS_END,
 356                                 "namespace": nsData
 357                         });
 358                 };
 359
 360                 self.result += ' ' + self._join(nsData.prefix, node.getAttribute('x-attr-name-'+this));
 361                 self.result += '="'+node.getAttribute('x-attr-value-'+this) +'"';
 362         });
 363
 364         /* print new namespace declarations */
 365         $.each(newNamespaces, function() {
 366                 self.result += " " + self._rjoin("xmlns", this.prefix);
 367                 self.result += '="' + this.uri + '"';
 368         });
 369
 370         if (node.childNodes.length > 0) {
 371                 self.result += ">";
 372                 self._pushTagEnd(tagName);
 373                 self._pushChildren(node);
 374         }
 375         else {
 376                 self.result += "/>";
 377         };
 378     }
 379 };
 380
 381 function html2text(params) {
 382         try {
 383                 var s = new HTMLSerializer();
 384                 params.success( s.serialize(params.element, params.stripOuter) );
 385         } catch(e) {
 386                 params.error("Nie udało się zserializować tekstu:" + e)
 387         }
 388 }