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?20101123',
  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         var parser = new DOMParser();
  65         var serializer = new XMLSerializer();
  66         var doc = parser.parseFromString(xml, 'text/xml');
  67         var error = $('parsererror', doc);
  68
  69         if (error.length == 0) {
  70             doc = xml2htmlStylesheet.transformToFragment(doc, document);
  71             console.log(doc.firstChild);
  72
  73         if(doc.firstChild === null) {
  74             options.error("Błąd w przetwarzaniu XML.");
  75                 return;
  76             }
  77
  78             error = $('parsererror', doc);
  79         }
  80
  81         if (error.length > 0 && options.error) {
  82             source = $('sourcetext', doc);
  83             source_text = source.text();
  84             source.text('');
  85             options.error(error.text(), source_text);
  86         } else {
  87             options.success(doc.firstChild);
  88
  89             withThemes(function(canonThemes) {
  90                 if (canonThemes != null) {
  91                     $('.theme-text-list').addClass('canon').each(function(){
  92                         var themes = $(this).html().split(',');
  93                         for (i in themes) {
  94                             themes[i] = $.trim(themes[i]);
  95                             if (canonThemes.indexOf(themes[i]) == -1)
  96                                 themes[i] = '<span x-pass-thru="true" class="noncanon">' + themes[i] + "</span>"
  97                         }
  98                         $(this).html(themes.join(', '));
  99                     });
 100                 }
 101             });
 102         }
 103     }, function() { options.error && options.error('Nie udało się załadować XSLT'); });
 104 }
 105
 106 /* USEFULL CONSTANTS */
 107 const ELEMENT_NODE                                       = 1;
 108 const ATTRIBUTE_NODE                 = 2;
 109 const TEXT_NODE                      = 3;
 110 const CDATA_SECTION_NODE             = 4;
 111 const ENTITY_REFERENCE_NODE          = 5;
 112 const ENTITY_NODE                    = 6;
 113 const PROCESSING_INSTRUCTION_NODE    = 7;
 114 const COMMENT_NODE                   = 8;
 115 const DOCUMENT_NODE                  = 9;
 116 const DOCUMENT_TYPE_NODE             = 10;
 117 const DOCUMENT_FRAGMENT_NODE         = 11;
 118 const NOTATION_NODE                  = 12;
 119 const XATTR_RE = /^x-attr-name-(.*)$/;
 120
 121 const ELEM_START = 1;
 122 const ELEM_END = 2;
 123 const NS_END = 3;
 124
 125 const NAMESPACES = {
 126         // namespaces not listed here will be assigned random names
 127         "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
 128         "http://purl.org/dc/elements/1.1/": "dc",
 129         "http://www.w3.org/XML/1998/namespace": "xml"
 130 };
 131
 132 function HTMLSerializer() {
 133         // empty constructor
 134 }
 135
 136
 137
 138 HTMLSerializer.prototype._prepare = function() {
 139         this.stack = [];
 140
 141         // XML namespace is implicit
 142         this.nsMap = {"http://www.w3.org/XML/1998/namespace": "xml"};
 143
 144         this.result = "";
 145         this.nsCounter = 1;
 146 }
 147
 148 HTMLSerializer.prototype._pushElement = function(element) {
 149         this.stack.push({
 150                 "type": ELEM_START,
 151                 "node": element
 152         });
 153 }
 154
 155 HTMLSerializer.prototype._pushChildren = function(element) {
 156         for(var i = element.childNodes.length-1; i >= 0; i--)
 157                 this._pushElement(element.childNodes.item(i));
 158 }
 159
 160 HTMLSerializer.prototype._pushTagEnd = function(tagName) {
 161         this.stack.push({
 162                 "type": ELEM_END,
 163                 "tagName": tagName
 164         });
 165 }
 166
 167 HTMLSerializer.prototype._verseBefore = function(node) {
 168     /* true if previous element is a previous verse of a stanza */
 169     var parent = node.parentNode;
 170     if (!parent || !parent.hasAttribute('x-node') || parent.getAttribute('x-node') != 'strofa')
 171         return false;
 172
 173         var prev = node.previousSibling;
 174
 175         while((prev !== null) && (prev.nodeType != ELEMENT_NODE)) {
 176                 prev = prev.previousSibling;
 177         }
 178
 179         return (prev !== null) && prev.hasAttribute('x-verse');
 180 }
 181
 182 HTMLSerializer.prototype._nodeIgnored = function(node) {
 183     return node.getAttribute('x-node') == 'wers';
 184 }
 185
 186 HTMLSerializer.prototype._ignoredWithWhitespace = function(node) {
 187     while (node.nodeType == ELEMENT_NODE && this._nodeIgnored(node) && node.childNodes.length > 0)
 188         node = node.childNodes[0];
 189     if (node.nodeType == TEXT_NODE)
 190         return node.nodeValue.match(/^\s/)
 191     else return false;
 192 }
 193
 194
 195 HTMLSerializer.prototype.serialize = function(rootElement, stripOuter)
 196 {
 197         var self = this;
 198         self._prepare();
 199
 200         if(!stripOuter)
 201                 self._pushElement(rootElement);
 202         else
 203                 self._pushChildren(rootElement);
 204
 205     var text_buffer = '';
 206
 207         while(self.stack.length > 0) {
 208                 var token = self.stack.pop();
 209
 210         if(token.type === ELEM_END) {
 211             self.result += text_buffer;
 212             text_buffer = '';
 213             if (token.tagName != '')
 214                 self.result += "</" + token.tagName + ">";
 215             continue;
 216         };
 217
 218                 if(token.type === NS_END) {
 219                         self._unassignNamespace(token.namespace);
 220                         continue;
 221                 }
 222
 223
 224                 switch(token.node.nodeType) {
 225                         case ELEMENT_NODE:
 226                                 if(token.node.hasAttribute('x-pass-thru')
 227                                  || token.node.hasAttribute('data-pass-thru')) {
 228                                         self._pushChildren(token.node);
 229                                         break;
 230                                 }
 231
 232                                 if(!token.node.hasAttribute('x-node'))
 233                                         break;
 234
 235                                 var xnode = token.node.getAttribute('x-node');
 236
 237                                 if(xnode === 'out-of-flow-text') {
 238                                         self._pushChildren(token.node);
 239                                         break;
 240                                 }
 241
 242                 if(token.node.hasAttribute('x-verse') && self._verseBefore(token.node)) {
 243                     self.result += '/';
 244                     // add whitespace if there's none
 245                     if (!(text_buffer.match(/^\s/) || self._ignoredWithWhitespace(token.node)))
 246                         self.result += ' ';
 247                 }
 248
 249                 self.result += text_buffer;
 250                 text_buffer = '';
 251                                 self._serializeElement(token.node);
 252                                 break;
 253                         case TEXT_NODE:
 254                                 self.result += text_buffer;
 255                                 text_buffer = token.node.nodeValue;
 256                                 break;
 257                 };
 258         };
 259     self.result += text_buffer;
 260
 261         return this.result;
 262 }
 263
 264 /*
 265  * TODO: this doesn't support prefix redefinitions
 266  */
 267 HTMLSerializer.prototype._unassignNamespace = function(nsData) {
 268         this.nsMap[nsData.uri] = undefined;
 269 };
 270
 271 HTMLSerializer.prototype._assignNamespace = function(uri) {
 272         if(uri === null) {
 273                 // default namespace
 274                 return ({"prefix": "", "uri": "", "fresh": false});
 275         }
 276
 277         if(this.nsMap[uri] === undefined) {
 278                 // this prefix hasn't been defined yet in current context
 279                 var prefix = NAMESPACES[uri];
 280
 281                 if (prefix === undefined) { // not predefined
 282                         prefix = "ns" + this.nsCounter;
 283                         this.nsCounter += 1;
 284                 }
 285
 286                 this.nsMap[uri] = prefix;
 287                 return ({
 288                         "prefix": prefix,
 289                         "uri": uri,
 290                         "fresh": true
 291                 });
 292         }
 293
 294         return ({"prefix": this.nsMap[uri], "uri": uri, "fresh": false});
 295 };
 296
 297 HTMLSerializer.prototype._join = function(prefix, name) {
 298         if(!!prefix)
 299                 return prefix + ":" + name;
 300         return name;
 301 };
 302
 303 HTMLSerializer.prototype._rjoin = function(prefix, name) {
 304         if(!!name)
 305                 return prefix + ":" + name;
 306         return prefix;
 307 };
 308
 309 HTMLSerializer.prototype._serializeElement = function(node) {
 310     var self = this;
 311
 312     if (self._nodeIgnored(node)) {
 313         self._pushTagEnd('');
 314         self._pushChildren(node);
 315     }
 316     else {
 317         var ns = node.getAttribute('x-ns');
 318         var nsPrefix = null;
 319         var newNamespaces = [];
 320
 321         var nsData = self._assignNamespace(node.getAttribute('x-ns'));
 322
 323         if(nsData.fresh) {
 324                 newNamespaces.push(nsData);
 325                 self.stack.push({
 326                         "type": NS_END,
 327                         "namespace": nsData
 328                 });
 329         }
 330
 331         var tagName = self._join(nsData.prefix, node.getAttribute('x-node'));
 332
 333         /* retrieve attributes */
 334         var attributeIDs = [];
 335         for (var i = 0; i < node.attributes.length; i++) {
 336                 var attr = node.attributes.item(i);
 337
 338                 // check if name starts with "x-attr-name"
 339                 var m = attr.name.match(XATTR_RE);
 340                 if (m !== null)
 341                         attributeIDs.push(m[1]);
 342         };
 343
 344         /* print out */
 345
 346         self.result += '<' + tagName;
 347
 348         $.each(attributeIDs, function() {
 349                 var nsData = self._assignNamespace(node.getAttribute('x-attr-ns-'+this));
 350
 351                 if(nsData.fresh) {
 352                         newNamespaces.push(nsData);
 353                         self.stack.push({
 354                                 "type": NS_END,
 355                                 "namespace": nsData
 356                         });
 357                 };
 358
 359                 self.result += ' ' + self._join(nsData.prefix, node.getAttribute('x-attr-name-'+this));
 360                 self.result += '="'+node.getAttribute('x-attr-value-'+this) +'"';
 361         });
 362
 363         /* print new namespace declarations */
 364         $.each(newNamespaces, function() {
 365                 self.result += " " + self._rjoin("xmlns", this.prefix);
 366                 self.result += '="' + this.uri + '"';
 367         });
 368
 369         if (node.childNodes.length > 0) {
 370                 self.result += ">";
 371                 self._pushTagEnd(tagName);
 372                 self._pushChildren(node);
 373         }
 374         else {
 375                 self.result += "/>";
 376         };
 377     }
 378 };
 379
 380 function html2text(params) {
 381         try {
 382                 var s = new HTMLSerializer();
 383                 params.success( s.serialize(params.element, params.stripOuter) );
 384         } catch(e) {
 385                 params.error("Nie udało się zserializować tekstu:" + e)
 386         }
 387 }