src/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?20201110',
  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 function xml2html(options) {
  39     withStylesheets(function() {
  40         var xml = options.xml.replace(/\/(\s+)/g, '<br />$1');
  41         xml = xml.replace(/([^a-zA-Z0-9ąćęłńóśźżĄĆĘŁŃÓŚŹŻ\s<>«»\\*_!,:;?&%."'=#()\/-]+)/g, '<alien>$1</alien>');
  42         var parser = new DOMParser();
  43         var serializer = new XMLSerializer();
  44         var doc = parser.parseFromString(xml, 'text/xml');
  45         var error = $('parsererror', doc);
  46
  47         if (error.length == 0) {
  48             doc = xml2htmlStylesheet.transformToFragment(doc, document);
  49
  50         if(doc.firstChild === null) {
  51             options.error("Błąd w przetwarzaniu XML.");
  52                 return;
  53             }
  54
  55             error = $('parsererror', doc);
  56         }
  57
  58         if (error.length > 0 && options.error) {
  59             source = $('sourcetext', doc);
  60             source_text = source.text();
  61             source.text('');
  62             options.error(error.text(), source_text);
  63         } else {
  64             options.success(doc.childNodes);
  65
  66             $.themes.withCanon(function(canonThemes) {
  67                 if (canonThemes != null) {
  68                     $('.theme-text-list').addClass('canon').each(function(){
  69                         var themes = $(this).html().split(',');
  70                         for (i in themes) {
  71                             themes[i] = $.trim(themes[i]);
  72                             if (canonThemes.indexOf(themes[i]) == -1)
  73                                 themes[i] = '<span x-pass-thru="true" class="noncanon">' + themes[i] + "</span>"
  74                         }
  75                         $(this).html(themes.join(', '));
  76                     });
  77                 }
  78             });
  79         }
  80     }, function() { options.error && options.error('Nie udało się załadować XSLT'); });
  81 }
  82
  83 /* USEFULL CONSTANTS */
  84 const ELEMENT_NODE                                       = 1;
  85 const ATTRIBUTE_NODE                 = 2;
  86 const TEXT_NODE                      = 3;
  87 const CDATA_SECTION_NODE             = 4;
  88 const ENTITY_REFERENCE_NODE          = 5;
  89 const ENTITY_NODE                    = 6;
  90 const PROCESSING_INSTRUCTION_NODE    = 7;
  91 const COMMENT_NODE                   = 8;
  92 const DOCUMENT_NODE                  = 9;
  93 const DOCUMENT_TYPE_NODE             = 10;
  94 const DOCUMENT_FRAGMENT_NODE         = 11;
  95 const NOTATION_NODE                  = 12;
  96 const XATTR_RE = /^x-attr-name-(.*)$/;
  97
  98 const ELEM_START = 1;
  99 const ELEM_END = 2;
 100 const NS_END = 3;
 101
 102 const NAMESPACES = {
 103         // namespaces not listed here will be assigned random names
 104         "http://www.w3.org/1999/02/22-rdf-syntax-ns#": "rdf",
 105         "http://purl.org/dc/elements/1.1/": "dc",
 106         "http://www.w3.org/XML/1998/namespace": "xml"
 107 };
 108
 109 function HTMLSerializer() {
 110         // empty constructor
 111 }
 112
 113
 114
 115 HTMLSerializer.prototype._prepare = function() {
 116         this.stack = [];
 117
 118         // XML namespace is implicit
 119         this.nsMap = {"http://www.w3.org/XML/1998/namespace": "xml"};
 120
 121         this.result = "";
 122         this.nsCounter = 1;
 123 }
 124
 125 HTMLSerializer.prototype._pushElement = function(element) {
 126         this.stack.push({
 127                 "type": ELEM_START,
 128                 "node": element
 129         });
 130 }
 131
 132 HTMLSerializer.prototype._pushChildren = function(element) {
 133         for(var i = element.childNodes.length-1; i >= 0; i--)
 134                 this._pushElement(element.childNodes.item(i));
 135 }
 136
 137 HTMLSerializer.prototype._pushTagEnd = function(tagName) {
 138         this.stack.push({
 139                 "type": ELEM_END,
 140                 "tagName": tagName
 141         });
 142 }
 143
 144 HTMLSerializer.prototype._verseBefore = function(node) {
 145     /* true if previous element is a previous verse of a stanza */
 146     var parent = node.parentNode;
 147     if (!parent || !parent.hasAttribute('x-node') || parent.getAttribute('x-node') != 'strofa')
 148         return false;
 149
 150         var prev = node.previousSibling;
 151
 152         while((prev !== null) && (prev.nodeType != ELEMENT_NODE)) {
 153                 prev = prev.previousSibling;
 154         }
 155
 156         return (prev !== null) && prev.hasAttribute('x-verse');
 157 }
 158
 159 HTMLSerializer.prototype._nodeIgnored = function(node) {
 160     return node.getAttribute('x-auto-node') == 'true';
 161 }
 162
 163 HTMLSerializer.prototype._ignoredWithWhitespace = function(node) {
 164     while (node.nodeType == ELEMENT_NODE && this._nodeIgnored(node) && node.childNodes.length > 0)
 165         node = node.childNodes[0];
 166     if (node.nodeType == TEXT_NODE)
 167         return node.nodeValue.match(/^\s/)
 168     else return false;
 169 }
 170
 171
 172 HTMLSerializer.prototype.serialize = function(rootElement, stripOuter)
 173 {
 174         var self = this;
 175         self._prepare();
 176
 177         if(!stripOuter)
 178                 self._pushElement(rootElement);
 179         else
 180                 self._pushChildren(rootElement);
 181
 182     var text_buffer = '';
 183
 184         while(self.stack.length > 0) {
 185                 var token = self.stack.pop();
 186
 187         if(token.type === ELEM_END) {
 188             self.result += text_buffer;
 189             text_buffer = '';
 190             if (token.tagName != '')
 191                 self.result += "</" + token.tagName + ">";
 192             continue;
 193         };
 194
 195                 if(token.type === NS_END) {
 196                         self._unassignNamespace(token.namespace);
 197                         continue;
 198                 }
 199
 200
 201                 switch(token.node.nodeType) {
 202                         case ELEMENT_NODE:
 203                                 if(token.node.hasAttribute('x-pass-thru')
 204                                  || token.node.hasAttribute('data-pass-thru')) {
 205                                         self._pushChildren(token.node);
 206                                         break;
 207                                 }
 208
 209                                 if(!token.node.hasAttribute('x-node'))
 210                                         break;
 211
 212                                 var xnode = token.node.getAttribute('x-node');
 213
 214                                 if(xnode === 'out-of-flow-text') {
 215                                         self._pushChildren(token.node);
 216                                         break;
 217                                 }
 218
 219                 if(token.node.hasAttribute('x-verse') && self._verseBefore(token.node)) {
 220                     self.result += '/';
 221                     // add whitespace if there's none
 222                     if (!(text_buffer.match(/^\s/) || self._ignoredWithWhitespace(token.node)))
 223                         self.result += ' ';
 224                 }
 225
 226                 self.result += text_buffer;
 227                 text_buffer = '';
 228                                 self._serializeElement(token.node);
 229                                 break;
 230                         case TEXT_NODE:
 231                                 self.result += text_buffer;
 232                                 text_buffer = token.node.nodeValue.replace(/&/g, '&amp;').replace(/</g, '&lt;');
 233                                 break;
 234             case COMMENT_NODE:
 235                 self.result += text_buffer;
 236                 text_buffer = '';
 237                 self.result += '<!--' + token.node.nodeValue + '-->';
 238                 break;
 239                 };
 240         };
 241     self.result += text_buffer;
 242
 243         return this.result;
 244 }
 245
 246 /*
 247  * TODO: this doesn't support prefix redefinitions
 248  */
 249 HTMLSerializer.prototype._unassignNamespace = function(nsData) {
 250         this.nsMap[nsData.uri] = undefined;
 251 };
 252
 253 HTMLSerializer.prototype._assignNamespace = function(uri) {
 254         if(uri === null) {
 255                 // default namespace
 256                 return ({"prefix": "", "uri": "", "fresh": false});
 257         }
 258
 259         if(this.nsMap[uri] === undefined) {
 260                 // this prefix hasn't been defined yet in current context
 261                 var prefix = NAMESPACES[uri];
 262
 263                 if (prefix === undefined) { // not predefined
 264                         prefix = "ns" + this.nsCounter;
 265                         this.nsCounter += 1;
 266                 }
 267
 268                 this.nsMap[uri] = prefix;
 269                 return ({
 270                         "prefix": prefix,
 271                         "uri": uri,
 272                         "fresh": true
 273                 });
 274         }
 275
 276         return ({"prefix": this.nsMap[uri], "uri": uri, "fresh": false});
 277 };
 278
 279 HTMLSerializer.prototype._join = function(prefix, name) {
 280         if(!!prefix)
 281                 return prefix + ":" + name;
 282         return name;
 283 };
 284
 285 HTMLSerializer.prototype._rjoin = function(prefix, name) {
 286         if(!!name)
 287                 return prefix + ":" + name;
 288         return prefix;
 289 };
 290
 291 HTMLSerializer.prototype._serializeElement = function(node) {
 292     var self = this;
 293
 294     if (self._nodeIgnored(node)) {
 295         self._pushTagEnd('');
 296         self._pushChildren(node);
 297     }
 298     else {
 299         var ns = node.getAttribute('x-ns');
 300         var nsPrefix = null;
 301         var newNamespaces = [];
 302
 303         var nsData = self._assignNamespace(node.getAttribute('x-ns'));
 304
 305         if(nsData.fresh) {
 306                 newNamespaces.push(nsData);
 307                 self.stack.push({
 308                         "type": NS_END,
 309                         "namespace": nsData
 310                 });
 311         }
 312
 313         var tagName = self._join(nsData.prefix, node.getAttribute('x-node'));
 314
 315         /* retrieve attributes */
 316         var attributeIDs = [];
 317         for (var i = 0; i < node.attributes.length; i++) {
 318                 var attr = node.attributes.item(i);
 319
 320                 // check if name starts with "x-attr-name"
 321                 var m = attr.name.match(XATTR_RE);
 322                 if (m !== null)
 323                         attributeIDs.push(m[1]);
 324         };
 325
 326         /* print out */
 327
 328         self.result += '<' + tagName;
 329
 330         $.each(attributeIDs, function() {
 331                 var nsData = self._assignNamespace(node.getAttribute('x-attr-ns-'+this));
 332
 333                 if(nsData.fresh) {
 334                         newNamespaces.push(nsData);
 335                         self.stack.push({
 336                                 "type": NS_END,
 337                                 "namespace": nsData
 338                         });
 339                 };
 340
 341                 self.result += ' ' + self._join(nsData.prefix, node.getAttribute('x-attr-name-'+this));
 342                 self.result += '="'+node.getAttribute('x-attr-value-'+this) +'"';
 343         });
 344
 345         /* print new namespace declarations */
 346         $.each(newNamespaces, function() {
 347                 self.result += " " + self._rjoin("xmlns", this.prefix);
 348                 self.result += '="' + this.uri + '"';
 349         });
 350
 351         if (node.childNodes.length > 0) {
 352                 self.result += ">";
 353                 self._pushTagEnd(tagName);
 354                 self._pushChildren(node);
 355         }
 356         else {
 357                 self.result += "/>";
 358         };
 359     }
 360 };
 361
 362 function html2text(params) {
 363         try {
 364                 var s = new HTMLSerializer();
 365                 params.success( s.serialize(params.element, params.stripOuter) );
 366         } catch(e) {
 367                 params.error("Nie udało się zserializować tekstu:" + e)
 368         }
 369 }