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',
  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 /*
 133  * PADDING for pretty-printing
 134  */
 135 const PADDING = {
 136     dramat_wierszowany_l: 4,
 137     dramat_wierszowany_lp: 4,
 138     dramat_wspolczesny: 4,
 139     wywiad: 4,
 140     opowiadanie: 4,
 141     powiesc: 4,
 142     liryka_l: 4,
 143     liryka_lp: 4,
 144     naglowek_czesc: 4,
 145     naglowek_akt: 4,
 146     naglowek_rozdzial: 4,
 147     naglowek_osoba: 4,
 148     lista_osob: 4,
 149
 150     akap: 3,
 151     akap_cd: 3,
 152     akap_dialog: 3,
 153     strofa: 3,
 154     motto: 3,
 155     miejsce_czas: 3,
 156
 157     autor_utworu: 2,
 158     nazwa_utworu: 2,
 159     dzielo_nadrzedne: 2,
 160
 161     didaskalia: 2,
 162     motto_podpis: 2,
 163     naglowek_listy: 2,
 164     kwestia: 1,
 165     lista_osoba: 1,
 166
 167         "podpis": 1,
 168         "wers": 0,
 169         "wers_cd": 0,
 170         "wers_akap": 0,
 171         "wers_wciety": 0,
 172
 173         "rdf:RDF": 3,
 174         "rdf:Description": 1,
 175 };
 176
 177 function getPadding(name) {
 178
 179         if(name.match(/^dc:.*$/))
 180                 return -1;
 181
 182         if(PADDING[name])
 183                 return PADDING[name];
 184
 185         return 0;
 186 }
 187
 188 function HTMLSerializer() {
 189         // empty constructor
 190 }
 191
 192
 193
 194 HTMLSerializer.prototype._prepare = function() {
 195         this.stack = [];
 196
 197         // XML namespace is implicit
 198         this.nsMap = {"http://www.w3.org/XML/1998/namespace": "xml"};
 199
 200         this.result = "";
 201         this.nsCounter = 1;
 202 }
 203
 204 HTMLSerializer.prototype._pushElement = function(element) {
 205         this.stack.push({
 206                 "type": ELEM_START,
 207                 "node": element
 208         });
 209 }
 210
 211 HTMLSerializer.prototype._pushChildren = function(element) {
 212         for(var i = element.childNodes.length-1; i >= 0; i--)
 213                 this._pushElement(element.childNodes.item(i));
 214 }
 215
 216 HTMLSerializer.prototype._pushTagEnd = function(tagName) {
 217         this.stack.push({
 218                 "type": ELEM_END,
 219                 "tagName": tagName
 220         });
 221 }
 222
 223 HTMLSerializer.prototype._verseBefore = function(node) {
 224     /* true if previous element is a previous verse of a stanza */
 225     var parent = node.parentNode;
 226     if (!parent || !parent.hasAttribute('x-node') || parent.getAttribute('x-node') != 'strofa')
 227         return false;
 228
 229         var prev = node.previousSibling;
 230
 231         while((prev !== null) && (prev.nodeType != ELEMENT_NODE)) {
 232                 prev = prev.previousSibling;
 233         }
 234
 235         return (prev !== null) && prev.hasAttribute('x-verse');
 236 }
 237
 238 HTMLSerializer.prototype.serialize = function(rootElement, stripOuter)
 239 {
 240         var self = this;
 241         self._prepare();
 242
 243         if(!stripOuter)
 244                 self._pushElement(rootElement);
 245         else
 246                 self._pushChildren(rootElement);
 247
 248         while(self.stack.length > 0) {
 249                 var token = self.stack.pop();
 250
 251                 if(token.type === ELEM_END) {
 252                         self.result += "</" + token.tagName + ">";
 253                         for(var padding = getPadding(token.tagName); padding > 0; padding--) {
 254                                 self.result += "\n";
 255                         }
 256                         continue;
 257                 };
 258
 259                 if(token.type === NS_END) {
 260                         self._unassignNamespace(token.namespace);
 261                         continue;
 262                 }
 263
 264
 265                 switch(token.node.nodeType) {
 266                         case ELEMENT_NODE:
 267                                 if(token.node.hasAttribute('x-pass-thru')
 268                                  || token.node.hasAttribute('data-pass-thru')) {
 269                                         self._pushChildren(token.node);
 270                                         break;
 271                                 }
 272
 273                                 if(!token.node.hasAttribute('x-node'))
 274                                         break;
 275
 276                                 var xnode = token.node.getAttribute('x-node');
 277
 278                                 if(xnode === 'wers') {
 279                                         /* push children */
 280                                         if(self._verseBefore(token.node))
 281                                                 self.result += '/\n';
 282                                         self._pushChildren(token.node);
 283                                         break;
 284                                 };
 285
 286                                 if(xnode === 'out-of-flow-text') {
 287                                         self._pushChildren(token.node);
 288                                         break;
 289                                 }
 290
 291                 if(token.node.hasAttribute('x-verse')) {
 292                     if(self._verseBefore(token.node)) {
 293                         self.result += '/';
 294                     }
 295                     self.result += '\n';
 296                 };
 297
 298                                 self._serializeElement(token.node);
 299                                 break;
 300                         case TEXT_NODE:
 301                                 // collapse previous element's padding
 302                                 var i = 0;
 303                                 while (token.node.nodeValue[i] == '\n' && self.result[self.result.length - 1] == '\n')
 304                                   i ++;
 305                                 self.result += token.node.nodeValue.substr(i);
 306                                 break;
 307                 };
 308         };
 309
 310         return this.result;
 311 }
 312
 313 /*
 314  * TODO: this doesn't support prefix redefinitions
 315  */
 316 HTMLSerializer.prototype._unassignNamespace = function(nsData) {
 317         this.nsMap[nsData.uri] = undefined;
 318 };
 319
 320 HTMLSerializer.prototype._assignNamespace = function(uri) {
 321         if(uri === null) {
 322                 // default namespace
 323                 return ({"prefix": "", "uri": "", "fresh": false});
 324         }
 325
 326         if(this.nsMap[uri] === undefined) {
 327                 // this prefix hasn't been defined yet in current context
 328                 var prefix = NAMESPACES[uri];
 329
 330                 if (prefix === undefined) { // not predefined
 331                         prefix = "ns" + this.nsCounter;
 332                         this.nsCounter += 1;
 333                 }
 334
 335                 this.nsMap[uri] = prefix;
 336                 return ({
 337                         "prefix": prefix,
 338                         "uri": uri,
 339                         "fresh": true
 340                 });
 341         }
 342
 343         return ({"prefix": this.nsMap[uri], "uri": uri, "fresh": false});
 344 };
 345
 346 HTMLSerializer.prototype._join = function(prefix, name) {
 347         if(!!prefix)
 348                 return prefix + ":" + name;
 349         return name;
 350 };
 351
 352 HTMLSerializer.prototype._rjoin = function(prefix, name) {
 353         if(!!name)
 354                 return prefix + ":" + name;
 355         return prefix;
 356 };
 357
 358 HTMLSerializer.prototype._serializeElement = function(node) {
 359         var self = this;
 360
 361         var ns = node.getAttribute('x-ns');
 362         var nsPrefix = null;
 363         var newNamespaces = [];
 364
 365         var nsData = self._assignNamespace(node.getAttribute('x-ns'));
 366
 367         if(nsData.fresh) {
 368                 newNamespaces.push(nsData);
 369                 self.stack.push({
 370                         "type": NS_END,
 371                         "namespace": nsData
 372                 });
 373         }
 374
 375         var tagName = self._join(nsData.prefix, node.getAttribute('x-node'));
 376
 377         /* retrieve attributes */
 378         var attributeIDs = [];
 379         for (var i = 0; i < node.attributes.length; i++) {
 380                 var attr = node.attributes.item(i);
 381
 382                 // check if name starts with "x-attr-name"
 383                 var m = attr.name.match(XATTR_RE);
 384                 if (m !== null)
 385                         attributeIDs.push(m[1]);
 386         };
 387
 388         /* print out */
 389
 390         // at least one newline before padded elements
 391         if (getPadding(tagName) && self.result[self.result.length - 1] != '\n')
 392                 self.result += '\n';
 393
 394         self.result += '<' + tagName;
 395
 396         $.each(attributeIDs, function() {
 397                 var nsData = self._assignNamespace(node.getAttribute('x-attr-ns-'+this));
 398
 399                 if(nsData.fresh) {
 400                         newNamespaces.push(nsData);
 401                         self.stack.push({
 402                                 "type": NS_END,
 403                                 "namespace": nsData
 404                         });
 405                 };
 406
 407                 self.result += ' ' + self._join(nsData.prefix, node.getAttribute('x-attr-name-'+this));
 408                 self.result += '="'+node.getAttribute('x-attr-value-'+this) +'"';
 409         });
 410
 411         /* print new namespace declarations */
 412         $.each(newNamespaces, function() {
 413                 self.result += " " + self._rjoin("xmlns", this.prefix);
 414                 self.result += '="' + this.uri + '"';
 415         });
 416
 417         if (node.childNodes.length > 0) {
 418                 self.result += ">";
 419                 self._pushTagEnd(tagName);
 420                 self._pushChildren(node);
 421         }
 422         else {
 423                 self.result += "/>";
 424         };
 425 };
 426
 427 function html2text(params) {
 428         try {
 429                 var s = new HTMLSerializer();
 430                 params.success( s.serialize(params.element, params.stripOuter) );
 431         } catch(e) {
 432                 params.error("Nie udało się zserializować tekstu:" + e)
 433         }
 434 }