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?20110520',
  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: '/editor/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     ALIEN_REGEX = /([^a-zA-Z0-9ąćęłńóśźżĄĆĘŁŃÓŚŹŻ\s<>«»\\*_!,:;?&%."'=#()\/-]+)/g;
  63
  64     withStylesheets(function() {
  65         var xml = options.xml.replace(/\/(\s+)/g, '<br />$1');
  66 //        xml = xml.replace(/([^a-zA-Z0-9ąćęłńóśźżĄĆĘŁŃÓŚŹŻ\s<>«»\\*_!,:;?&%."'=#()\/-]+)/g, '<alien>$1</alien>');
  67         var parser = new DOMParser();
  68         var serializer = new XMLSerializer();
  69         var doc = parser.parseFromString(xml, 'text/xml');
  70         walk(doc.firstChild, wrapInTag(ALIEN_REGEX, 'alien'))
  71         var error = $('parsererror', doc);
  72
  73         if (error.length == 0) {
  74             doc = xml2htmlStylesheet.transformToFragment(doc, document);
  75             console.log(doc.firstChild);
  76
  77         if(doc.firstChild === null) {
  78             options.error("Błąd w przetwarzaniu XML.");
  79                 return;
  80             }
  81
  82             error = $('parsererror', doc);
  83         }
  84
  85         if (error.length > 0 && options.error) {
  86             source = $('sourcetext', doc);
  87             source_text = source.text();
  88             source.text('');
  89             options.error(error.text(), source_text);
  90         } else {
  91             options.success(doc.childNodes);
  92
  93             withThemes(function(canonThemes) {
  94                 if (canonThemes != null) {
  95                     $('.theme-text-list').addClass('canon').each(function(){
  96                         var themes = $(this).html().split(',');
  97                         for (i in themes) {
  98                             themes[i] = $.trim(themes[i]);
  99                             if (canonThemes.indexOf(themes[i]) == -1)
 100                                 themes[i] = '<span x-pass-thru="true" class="noncanon">' + themes[i] + "</span>"
 101                         }
 102                         $(this).html(themes.join(', '));
 103                     });
 104                 }
 105             });
 106         }
 107     }, function() { options.error && options.error('Nie udało się załadować XSLT'); });
 108 }
 109
 110 /* USEFULL CONSTANTS */
 111 const ELEMENT_NODE                                       = 1;
 112 const ATTRIBUTE_NODE                 = 2;
 113 const TEXT_NODE                      = 3;
 114 const CDATA_SECTION_NODE             = 4;
 115 const ENTITY_REFERENCE_NODE          = 5;
 116 const ENTITY_NODE                    = 6;
 117 const PROCESSING_INSTRUCTION_NODE    = 7;
 118 const COMMENT_NODE                   = 8;
 119 const DOCUMENT_NODE                  = 9;
 120 const DOCUMENT_TYPE_NODE             = 10;
 121 const DOCUMENT_FRAGMENT_NODE         = 11;
 122 const NOTATION_NODE                  = 12;
 123 const XATTR_RE = /^x-attr-name-(.*)$/;
 124
 125 const ELEM_START = 1;
 126 const ELEM_END = 2;
 127 const NS_END = 3;
 128
 129 const NAMESPACES = {
 130         // namespaces not listed here will be assigned random names
 131         "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
 132         "http://purl.org/dc/elements/1.1/": "dc",
 133         "http://www.w3.org/XML/1998/namespace": "xml"
 134 };
 135
 136 function HTMLSerializer() {
 137         // empty constructor
 138 }
 139
 140
 141
 142 HTMLSerializer.prototype._prepare = function() {
 143         this.stack = [];
 144
 145         // XML namespace is implicit
 146         this.nsMap = {"http://www.w3.org/XML/1998/namespace": "xml"};
 147
 148         this.result = "";
 149         this.nsCounter = 1;
 150 }
 151
 152 HTMLSerializer.prototype._pushElement = function(element) {
 153         this.stack.push({
 154                 "type": ELEM_START,
 155                 "node": element
 156         });
 157 }
 158
 159 HTMLSerializer.prototype._pushChildren = function(element) {
 160         for(var i = element.childNodes.length-1; i >= 0; i--)
 161                 this._pushElement(element.childNodes.item(i));
 162 }
 163
 164 HTMLSerializer.prototype._pushTagEnd = function(tagName) {
 165         this.stack.push({
 166                 "type": ELEM_END,
 167                 "tagName": tagName
 168         });
 169 }
 170
 171 HTMLSerializer.prototype._verseBefore = function(node) {
 172     /* true if previous element is a previous verse of a stanza */
 173     var parent = node.parentNode;
 174     if (!parent || !parent.hasAttribute('x-node') || parent.getAttribute('x-node') != 'strofa')
 175         return false;
 176
 177         var prev = node.previousSibling;
 178
 179         while((prev !== null) && (prev.nodeType != ELEMENT_NODE)) {
 180                 prev = prev.previousSibling;
 181         }
 182
 183         return (prev !== null) && prev.hasAttribute('x-verse');
 184 }
 185
 186 HTMLSerializer.prototype._nodeIgnored = function(node) {
 187     return node.getAttribute('x-node') == 'wers';
 188 }
 189
 190 HTMLSerializer.prototype._ignoredWithWhitespace = function(node) {
 191     while (node.nodeType == ELEMENT_NODE && this._nodeIgnored(node) && node.childNodes.length > 0)
 192         node = node.childNodes[0];
 193     if (node.nodeType == TEXT_NODE)
 194         return node.nodeValue.match(/^\s/)
 195     else return false;
 196 }
 197
 198
 199 HTMLSerializer.prototype.serialize = function(rootElement, stripOuter)
 200 {
 201         var self = this;
 202         self._prepare();
 203
 204         if(!stripOuter)
 205                 self._pushElement(rootElement);
 206         else
 207                 self._pushChildren(rootElement);
 208
 209     var text_buffer = '';
 210
 211         while(self.stack.length > 0) {
 212                 var token = self.stack.pop();
 213
 214         if(token.type === ELEM_END) {
 215             self.result += text_buffer;
 216             text_buffer = '';
 217             if (token.tagName != '')
 218                 self.result += "</" + token.tagName + ">";
 219             continue;
 220         };
 221
 222                 if(token.type === NS_END) {
 223                         self._unassignNamespace(token.namespace);
 224                         continue;
 225                 }
 226
 227
 228                 switch(token.node.nodeType) {
 229                         case ELEMENT_NODE:
 230                                 if(token.node.hasAttribute('x-pass-thru')
 231                                  || token.node.hasAttribute('data-pass-thru')) {
 232                                         self._pushChildren(token.node);
 233                                         break;
 234                                 }
 235
 236                                 if(!token.node.hasAttribute('x-node'))
 237                                         break;
 238
 239                                 var xnode = token.node.getAttribute('x-node');
 240
 241                                 if(xnode === 'out-of-flow-text') {
 242                                         self._pushChildren(token.node);
 243                                         break;
 244                                 }
 245
 246                 if(token.node.hasAttribute('x-verse') && self._verseBefore(token.node)) {
 247                     self.result += '/';
 248                     // add whitespace if there's none
 249                     if (!(text_buffer.match(/^\s/) || self._ignoredWithWhitespace(token.node)))
 250                         self.result += ' ';
 251                 }
 252
 253                 self.result += text_buffer;
 254                 text_buffer = '';
 255                                 self._serializeElement(token.node);
 256                                 break;
 257                         case TEXT_NODE:
 258                                 self.result += text_buffer;
 259                                 text_buffer = token.node.nodeValue.replace(/&/g, '&amp;').replace(/</g, '&lt;');
 260                                 break;
 261             case COMMENT_NODE:
 262                 self.result += text_buffer;
 263                 text_buffer = '';
 264                 self.result += '<!--' + token.node.nodeValue + '-->';
 265                 break;
 266                 };
 267         };
 268     self.result += text_buffer;
 269
 270         return this.result;
 271 }
 272
 273 /*
 274  * TODO: this doesn't support prefix redefinitions
 275  */
 276 HTMLSerializer.prototype._unassignNamespace = function(nsData) {
 277         this.nsMap[nsData.uri] = undefined;
 278 };
 279
 280 HTMLSerializer.prototype._assignNamespace = function(uri) {
 281         if(uri === null) {
 282                 // default namespace
 283                 return ({"prefix": "", "uri": "", "fresh": false});
 284         }
 285
 286         if(this.nsMap[uri] === undefined) {
 287                 // this prefix hasn't been defined yet in current context
 288                 var prefix = NAMESPACES[uri];
 289
 290                 if (prefix === undefined) { // not predefined
 291                         prefix = "ns" + this.nsCounter;
 292                         this.nsCounter += 1;
 293                 }
 294
 295                 this.nsMap[uri] = prefix;
 296                 return ({
 297                         "prefix": prefix,
 298                         "uri": uri,
 299                         "fresh": true
 300                 });
 301         }
 302
 303         return ({"prefix": this.nsMap[uri], "uri": uri, "fresh": false});
 304 };
 305
 306 HTMLSerializer.prototype._join = function(prefix, name) {
 307         if(!!prefix)
 308                 return prefix + ":" + name;
 309         return name;
 310 };
 311
 312 HTMLSerializer.prototype._rjoin = function(prefix, name) {
 313         if(!!name)
 314                 return prefix + ":" + name;
 315         return prefix;
 316 };
 317
 318 HTMLSerializer.prototype._serializeElement = function(node) {
 319     var self = this;
 320
 321     if (self._nodeIgnored(node)) {
 322         self._pushTagEnd('');
 323         self._pushChildren(node);
 324     }
 325     else {
 326         var ns = node.getAttribute('x-ns');
 327         var nsPrefix = null;
 328         var newNamespaces = [];
 329
 330         var nsData = self._assignNamespace(node.getAttribute('x-ns'));
 331
 332         if(nsData.fresh) {
 333                 newNamespaces.push(nsData);
 334                 self.stack.push({
 335                         "type": NS_END,
 336                         "namespace": nsData
 337                 });
 338         }
 339
 340         var tagName = self._join(nsData.prefix, node.getAttribute('x-node'));
 341
 342         /* retrieve attributes */
 343         var attributeIDs = [];
 344         for (var i = 0; i < node.attributes.length; i++) {
 345                 var attr = node.attributes.item(i);
 346
 347                 // check if name starts with "x-attr-name"
 348                 var m = attr.name.match(XATTR_RE);
 349                 if (m !== null)
 350                         attributeIDs.push(m[1]);
 351         };
 352
 353         /* print out */
 354
 355         self.result += '<' + tagName;
 356
 357         $.each(attributeIDs, function() {
 358                 var nsData = self._assignNamespace(node.getAttribute('x-attr-ns-'+this));
 359
 360                 if(nsData.fresh) {
 361                         newNamespaces.push(nsData);
 362                         self.stack.push({
 363                                 "type": NS_END,
 364                                 "namespace": nsData
 365                         });
 366                 };
 367
 368                 self.result += ' ' + self._join(nsData.prefix, node.getAttribute('x-attr-name-'+this));
 369                 self.result += '="'+node.getAttribute('x-attr-value-'+this) +'"';
 370         });
 371
 372         /* print new namespace declarations */
 373         $.each(newNamespaces, function() {
 374                 self.result += " " + self._rjoin("xmlns", this.prefix);
 375                 self.result += '="' + this.uri + '"';
 376         });
 377
 378         if (node.childNodes.length > 0) {
 379                 self.result += ">";
 380                 self._pushTagEnd(tagName);
 381                 self._pushChildren(node);
 382         }
 383         else {
 384                 self.result += "/>";
 385         };
 386     }
 387 };
 388
 389 function html2text(params) {
 390         try {
 391                 var s = new HTMLSerializer();
 392                 params.success( s.serialize(params.element, params.stripOuter) );
 393         } catch(e) {
 394                 params.error("Nie udało się zserializować tekstu:" + e)
 395         }
 396 }