src/selector.js

   1 /*
   2  * Sizzle CSS Selector Engine - v0.9
   3  *  Copyright 2009, John Resig (http://ejohn.org/)
   4  *  released under the MIT License
   5  */
   6 (function(){
   7
   8 var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]+\]|[^[\]]+)+\]|\\.|[^ >+~,(\[]+)+|[>+~])(\s*,\s*)?/g;
   9
  10 var cache = null;
  11 var done = 0;
  12
  13 if ( document.addEventListener && !document.querySelectorAll ) {
  14         cache = {};
  15         var invalidate = function(){ cache = {}; };
  16         document.addEventListener("DOMAttrModified", invalidate, false);
  17         document.addEventListener("DOMNodeInserted", invalidate, false);
  18         document.addEventListener("DOMNodeRemoved", invalidate, false);
  19 }
  20
  21 var Sizzle = function(selector, context, results, seed) {
  22         var doCache = !results;
  23         results = results || [];
  24         context = context || document;
  25
  26         if ( context.nodeType !== 1 && context.nodeType !== 9 )
  27                 return [];
  28
  29         if ( !selector || typeof selector !== "string" ) {
  30                 return results;
  31         }
  32
  33         if ( cache && context === document && cache[ selector ] ) {
  34                 results.push.apply( results, cache[ selector ] );
  35                 return results;
  36         }
  37
  38         var parts = [], m, set, checkSet, check, mode, extra;
  39
  40         // Reset the position of the chunker regexp (start from head)
  41         chunker.lastIndex = 0;
  42
  43         while ( (m = chunker.exec(selector)) !== null ) {
  44                 parts.push( m[1] );
  45
  46                 if ( m[2] ) {
  47                         extra = RegExp.rightContext;
  48                         break;
  49                 }
  50         }
  51
  52         if ( parts.length > 1 && Expr.match.POS.exec( selector ) ) {
  53                 if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
  54                         var later = "", match;
  55
  56                         // Position selectors must be done after the filter
  57                         while ( (match = Expr.match.POS.exec( selector )) ) {
  58                                 later += match[0];
  59                                 selector = selector.replace( Expr.match.POS, "" );
  60                         }
  61
  62                         set = Sizzle.filter( later, Sizzle( selector, context ) );
  63                 } else {
  64                         set = Expr.relative[ parts[0] ] ?
  65                                 [ context ] :
  66                                 Sizzle( parts.shift(), context );
  67
  68                         while ( parts.length ) {
  69                                 var tmpSet = [];
  70
  71                                 selector = parts.shift();
  72                                 if ( Expr.relative[ selector ] )
  73                                         selector += parts.shift();
  74
  75                                 for ( var i = 0, l = set.length; i < l; i++ ) {
  76                                         Sizzle( selector, set[i], tmpSet );
  77                                 }
  78
  79                                 set = tmpSet;
  80                         }
  81                 }
  82         } else {
  83                 var ret = seed ?
  84                         { expr: parts.pop(), set: makeArray(seed) } :
  85                         Sizzle.find( parts.pop(), parts.length === 1 && context.parentNode ? context.parentNode : context );
  86                 set = Sizzle.filter( ret.expr, ret.set );
  87
  88                 if ( parts.length > 0 ) {
  89                         checkSet = makeArray(set);
  90                 }
  91
  92                 while ( parts.length ) {
  93                         var cur = parts.pop(), pop = cur;
  94
  95                         if ( !Expr.relative[ cur ] ) {
  96                                 cur = "";
  97                         } else {
  98                                 pop = parts.pop();
  99                         }
 100
 101                         if ( pop == null ) {
 102                                 pop = context;
 103                         }
 104
 105                         Expr.relative[ cur ]( checkSet, pop );
 106                 }
 107         }
 108
 109         if ( !checkSet ) {
 110                 checkSet = set;
 111         }
 112
 113         if ( !checkSet ) {
 114                 throw "Syntax error, unrecognized expression: " + (cur || selector);
 115         }
 116
 117         if ( checkSet instanceof Array ) {
 118                 if ( context.nodeType === 1 ) {
 119                         for ( var i = 0; checkSet[i] != null; i++ ) {
 120                                 if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
 121                                         results.push( set[i] );
 122                                 }
 123                         }
 124                 } else {
 125                         for ( var i = 0; checkSet[i] != null; i++ ) {
 126                                 if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
 127                                         results.push( set[i] );
 128                                 }
 129                         }
 130                 }
 131         } else {
 132                 makeArray( checkSet, results );
 133         }
 134
 135         if ( extra ) {
 136                 Sizzle( extra, context, results );
 137         }
 138
 139         if ( cache && doCache ) {
 140                 cache[selector] = results.slice(0);
 141         }
 142
 143         return results;
 144 };
 145
 146 Sizzle.matches = function(expr, set){
 147         return Sizzle(expr, null, null, set);
 148 };
 149
 150 Sizzle.find = function(expr, context){
 151         var set, match;
 152
 153         if ( !expr ) {
 154                 return [];
 155         }
 156
 157         var later = "", match;
 158
 159         // Pseudo-selectors could contain other selectors (like :not)
 160         while ( (match = Expr.match.PSEUDO.exec( expr )) ) {
 161                 var left = RegExp.leftContext;
 162
 163                 if ( left.substr( left.length - 1 ) !== "\\" ) {
 164                         later += match[0];
 165                         expr = expr.replace( Expr.match.PSEUDO, "" );
 166                 } else {
 167                         // TODO: Need a better solution, fails: .class\:foo:realfoo(#id)
 168                         break;
 169                 }
 170         }
 171
 172         for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
 173                 var type = Expr.order[i];
 174
 175                 if ( (match = Expr.match[ type ].exec( expr )) ) {
 176                         var left = RegExp.leftContext;
 177
 178                         if ( left.substr( left.length - 1 ) !== "\\" ) {
 179                                 match[1] = (match[1] || "").replace(/\\/g, "");
 180                                 set = Expr.find[ type ]( match, context );
 181
 182                                 if ( set != null ) {
 183                                         expr = expr.replace( Expr.match[ type ], "" );
 184                                         break;
 185                                 }
 186                         }
 187                 }
 188         }
 189
 190         if ( !set ) {
 191                 set = context.getElementsByTagName("*");
 192         }
 193
 194         expr += later;
 195
 196         return {set: set, expr: expr};
 197 };
 198
 199 Sizzle.filter = function(expr, set, inplace){
 200         var old = expr, result = [], curLoop = set, match;
 201
 202         while ( expr && set.length ) {
 203                 for ( var type in Expr.filter ) {
 204                         if ( (match = Expr.match[ type ].exec( expr )) != null ) {
 205                                 var anyFound = false, filter = Expr.filter[ type ], goodArray = null;
 206
 207                                 if ( curLoop == result ) {
 208                                         result = [];
 209                                 }
 210
 211                                 if ( Expr.preFilter[ type ] ) {
 212                                         match = Expr.preFilter[ type ]( match, curLoop );
 213
 214                                         if ( match[0] === true ) {
 215                                                 goodArray = [];
 216                                                 var last = null, elem;
 217                                                 for ( var i = 0; (elem = curLoop[i]) !== undefined; i++ ) {
 218                                                         if ( elem && last !== elem ) {
 219                                                                 goodArray.push( elem );
 220                                                                 last = elem;
 221                                                         }
 222                                                 }
 223                                         }
 224
 225                                 }
 226
 227                                 var goodPos = 0, found, item;
 228
 229                                 for ( var i = 0; (item = curLoop[i]) !== undefined; i++ ) {
 230                                         if ( item ) {
 231                                                 if ( goodArray && item != goodArray[goodPos] ) {
 232                                                         goodPos++;
 233                                                 }
 234
 235                                                 found = filter( item, match, goodPos, goodArray );
 236                                                 if ( inplace && found != null ) {
 237                                                         curLoop[i] = found ? curLoop[i] : false;
 238                                                         if ( found ) {
 239                                                                 anyFound = true;
 240                                                         }
 241                                                 } else if ( found ) {
 242                                                         result.push( item );
 243                                                         anyFound = true;
 244                                                 }
 245                                         }
 246                                 }
 247
 248                                 if ( found !== undefined ) {
 249                                         if ( !inplace ) {
 250                                                 curLoop = result;
 251                                         }
 252
 253                                         expr = expr.replace( Expr.match[ type ], "" );
 254
 255                                         if ( !anyFound ) {
 256                                                 return [];
 257                                         }
 258
 259                                         break;
 260                                 }
 261                         }
 262                 }
 263
 264
 265                 expr = expr.replace(/\s*,\s*/, "");
 266
 267                 // Improper expression
 268                 if ( expr == old ) {
 269                         throw "Syntax error, unrecognized expression: " + expr;
 270                 }
 271
 272                 old = expr;
 273         }
 274
 275         return curLoop;
 276 };
 277
 278 var Expr = Sizzle.selectors = {
 279         order: [ "ID", "NAME", "TAG" ],
 280         match: {
 281                 ID: /#((?:[\w\u0128-\uFFFF_-]|\\.)+)/,
 282                 CLASS: /\.((?:[\w\u0128-\uFFFF_-]|\\.)+)/,
 283                 NAME: /\[name=((?:[\w\u0128-\uFFFF_-]|\\.)+)\]/,
 284                 ATTR: /\[((?:[\w\u0128-\uFFFF_-]|\\.)+)\s*(?:(\S{0,1}=)\s*(['"]*)(.*?)\3|)\]/,
 285                 TAG: /^((?:[\w\u0128-\uFFFF\*_-]|\\.)+)/,
 286                 CHILD: /:(only|nth|last|first)-child\(?(even|odd|[\dn+-]*)\)?/,
 287                 POS: /:(nth|eq|gt|lt|first|last|even|odd)\(?(\d*)\)?(?:[^-]|$)/,
 288                 PSEUDO: /:((?:[\w\u0128-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
 289         },
 290         attrMap: {
 291                 "class": "className"
 292         },
 293         relative: {
 294                 "+": function(checkSet, part){
 295                         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 296                                 var elem = checkSet[i];
 297                                 if ( elem ) {
 298                                         var cur = elem.previousSibling;
 299                                         while ( cur && cur.nodeType !== 1 ) {
 300                                                 cur = cur.previousSibling;
 301                                         }
 302                                         checkSet[i] = typeof part === "string" ?
 303                                                 cur || false :
 304                                                 cur === part;
 305                                 }
 306                         }
 307
 308                         if ( typeof part === "string" ) {
 309                                 Sizzle.filter( part, checkSet, true );
 310                         }
 311                 },
 312                 ">": function(checkSet, part){
 313                         if ( typeof part === "string" && !/\W/.test(part) ) {
 314                                 part = part.toUpperCase();
 315
 316                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 317                                         var elem = checkSet[i];
 318                                         if ( elem ) {
 319                                                 var parent = elem.parentNode;
 320                                                 checkSet[i] = parent.nodeName === part ? parent : false;
 321                                         }
 322                                 }
 323                         } else {
 324                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 325                                         var elem = checkSet[i];
 326                                         if ( elem ) {
 327                                                 checkSet[i] = typeof part === "string" ?
 328                                                         elem.parentNode :
 329                                                         elem.parentNode === part;
 330                                         }
 331                                 }
 332
 333                                 if ( typeof part === "string" ) {
 334                                         Sizzle.filter( part, checkSet, true );
 335                                 }
 336                         }
 337                 },
 338                 "": function(checkSet, part){
 339                         var doneName = "done" + (done++), checkFn = dirCheck;
 340
 341                         if ( !part.match(/\W/) ) {
 342                                 var nodeCheck = part = part.toUpperCase();
 343                                 checkFn = dirNodeCheck;
 344                         }
 345
 346                         checkFn("parentNode", part, doneName, checkSet, nodeCheck);
 347                 },
 348                 "~": function(checkSet, part){
 349                         var doneName = "done" + (done++), checkFn = dirCheck;
 350
 351                         if ( typeof part === "string" && !part.match(/\W/) ) {
 352                                 var nodeCheck = part = part.toUpperCase();
 353                                 checkFn = dirNodeCheck;
 354                         }
 355
 356                         checkFn("previousSibling", part, doneName, checkSet, nodeCheck);
 357                 }
 358         },
 359         find: {
 360                 ID: function(match, context){
 361                         if ( context.getElementById ) {
 362                                 var m = context.getElementById(match[1]);
 363                                 return m ? [m] : [];
 364                         }
 365                 },
 366                 NAME: function(match, context){
 367                         return context.getElementsByName(match[1]);
 368                 },
 369                 TAG: function(match, context){
 370                         return context.getElementsByTagName(match[1]);
 371                 }
 372         },
 373         preFilter: {
 374                 CLASS: function(match){
 375                         return new RegExp( "(?:^|\\s)" + match[1] + "(?:\\s|$)" );
 376                 },
 377                 ID: function(match){
 378                         return match[1];
 379                 },
 380                 TAG: function(match){
 381                         return match[1].toUpperCase();
 382                 },
 383                 CHILD: function(match){
 384                         if ( match[1] == "nth" ) {
 385                                 // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
 386                                 var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
 387                                         match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
 388                                         !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
 389
 390                                 // calculate the numbers (first)n+(last) including if they are negative
 391                                 match[2] = (test[1] + (test[2] || 1)) - 0;
 392                                 match[3] = test[3] - 0;
 393                         }
 394
 395                         // TODO: Move to normal caching system
 396                         match[0] = "done" + (done++);
 397
 398                         return match;
 399                 },
 400                 ATTR: function(match){
 401                         var name = match[1];
 402
 403                         if ( Expr.attrMap[name] ) {
 404                                 match[1] = Expr.attrMap[name];
 405                         }
 406
 407                         if ( match[2] === "~=" ) {
 408                                 match[4] = " " + match[4] + " ";
 409                         }
 410
 411                         return match;
 412                 },
 413                 PSEUDO: function(match){
 414                         if ( match[1] === "not" ) {
 415                                 match[3] = match[3].split(/\s*,\s*/);
 416                         }
 417
 418                         return match;
 419                 },
 420                 POS: function(match){
 421                         match.unshift( true );
 422                         return match;
 423                 }
 424         },
 425         filters: {
 426                 enabled: function(elem){
 427                         return elem.disabled === false && elem.type !== "hidden";
 428                 },
 429                 disabled: function(elem){
 430                         return elem.disabled === true;
 431                 },
 432                 checked: function(elem){
 433                         return elem.checked === true;
 434                 },
 435                 selected: function(elem){
 436                         // Accessing this property makes selected-by-default
 437                         // options in Safari work properly
 438                         elem.parentNode.selectedIndex;
 439                         return elem.selected === true;
 440                 },
 441                 parent: function(elem){
 442                         return !!elem.firstChild;
 443                 },
 444                 empty: function(elem){
 445                         return !elem.firstChild;
 446                 },
 447                 has: function(elem, i, match){
 448                         return !!Sizzle( match[3], elem ).length;
 449                 },
 450                 header: function(elem){
 451                         return /h\d/i.test( elem.nodeName );
 452                 },
 453                 text: function(elem){
 454                         return "text" === elem.type;
 455                 },
 456                 radio: function(elem){
 457                         return "radio" === elem.type;
 458                 },
 459                 checkbox: function(elem){
 460                         return "checkbox" === elem.type;
 461                 },
 462                 file: function(elem){
 463                         return "file" === elem.type;
 464                 },
 465                 password: function(elem){
 466                         return "password" === elem.type;
 467                 },
 468                 submit: function(elem){
 469                         return "submit" === elem.type;
 470                 },
 471                 image: function(elem){
 472                         return "image" === elem.type;
 473                 },
 474                 reset: function(elem){
 475                         return "reset" === elem.type;
 476                 },
 477                 button: function(elem){
 478                         return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
 479                 },
 480                 input: function(elem){
 481                         return /input|select|textarea|button/i.test(elem.nodeName);
 482                 }
 483         },
 484         setFilters: {
 485                 first: function(elem, i){
 486                         return i === 0;
 487                 },
 488                 last: function(elem, i, match, array){
 489                         return i === array.length - 1;
 490                 },
 491                 even: function(elem, i){
 492                         return i % 2 === 0;
 493                 },
 494                 odd: function(elem, i){
 495                         return i % 2 === 1;
 496                 },
 497                 lt: function(elem, i, match){
 498                         return i < match[3] - 0;
 499                 },
 500                 gt: function(elem, i, match){
 501                         return i > match[3] - 0;
 502                 },
 503                 nth: function(elem, i, match){
 504                         return match[3] - 0 == i;
 505                 },
 506                 eq: function(elem, i, match){
 507                         return match[3] - 0 == i;
 508                 }
 509         },
 510         filter: {
 511                 CHILD: function(elem, match){
 512                         var type = match[1], parent = elem.parentNode;
 513
 514                         var doneName = match[0];
 515
 516                         if ( parent && !parent[ doneName ] ) {
 517                                 var count = 1;
 518
 519                                 for ( var node = parent.firstChild; node; node = node.nextSibling ) {
 520                                         if ( node.nodeType == 1 ) {
 521                                                 node.nodeIndex = count++;
 522                                         }
 523                                 }
 524
 525                                 parent[ doneName ] = count - 1;
 526                         }
 527
 528                         if ( type == "first" ) {
 529                                 return elem.nodeIndex == 1;
 530                         } else if ( type == "last" ) {
 531                                 return elem.nodeIndex == parent[ doneName ];
 532                         } else if ( type == "only" ) {
 533                                 return parent[ doneName ] == 1;
 534                         } else if ( type == "nth" ) {
 535                                 var add = false, first = match[2], last = match[3];
 536
 537                                 if ( first == 1 && last == 0 ) {
 538                                         return true;
 539                                 }
 540
 541                                 if ( first == 0 ) {
 542                                         if ( elem.nodeIndex == last ) {
 543                                                 add = true;
 544                                         }
 545                                 } else if ( (elem.nodeIndex - last) % first == 0 && (elem.nodeIndex - last) / first >= 0 ) {
 546                                         add = true;
 547                                 }
 548
 549                                 return add;
 550                         }
 551                 },
 552                 PSEUDO: function(elem, match, i, array){
 553                         var name = match[1], filter = Expr.filters[ name ];
 554
 555                         if ( filter ) {
 556                                 return filter( elem, i, match, array )
 557                         } else if ( name === "contains" ) {
 558                                 return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
 559                         } else if ( name === "not" ) {
 560                                 var not = match[3];
 561
 562                                 for ( var i = 0, l = not.length; i < l; i++ ) {
 563                                         if ( Sizzle.filter(not[i], [elem]).length > 0 ) {
 564                                                 return false;
 565                                         }
 566                                 }
 567
 568                                 return true;
 569                         }
 570                 },
 571                 ID: function(elem, match){
 572                         return elem.nodeType === 1 && elem.getAttribute("id") === match;
 573                 },
 574                 TAG: function(elem, match){
 575                         return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
 576                 },
 577                 CLASS: function(elem, match){
 578                         return match.test( elem.className );
 579                 },
 580                 ATTR: function(elem, match){
 581                         var result = elem[ match[1] ] || elem.getAttribute( match[1] ), value = result + "", type = match[2], check = match[4];
 582                         return result == null ?
 583                                 false :
 584                                 type === "=" ?
 585                                 value === check :
 586                                 type === "*=" ?
 587                                 value.indexOf(check) >= 0 :
 588                                 type === "~=" ?
 589                                 (" " + value + " ").indexOf(check) >= 0 :
 590                                 !match[4] ?
 591                                 result :
 592                                 type === "!=" ?
 593                                 value != check :
 594                                 type === "^=" ?
 595                                 value.indexOf(check) === 0 :
 596                                 type === "$=" ?
 597                                 value.substr(value.length - check.length) === check :
 598                                 type === "|=" ?
 599                                 value === check || value.substr(0, check.length + 1) === check + "-" :
 600                                 false;
 601                 },
 602                 POS: function(elem, match, i, array){
 603                         var name = match[2], filter = Expr.setFilters[ name ];
 604
 605                         if ( filter ) {
 606                                 return filter( elem, i, match, array );
 607                         }
 608                 }
 609         }
 610 };
 611
 612 var makeArray = function(array, results) {
 613         array = Array.prototype.slice.call( array );
 614
 615         if ( results ) {
 616                 results.push.apply( results, array );
 617                 return results;
 618         }
 619
 620         return array;
 621 };
 622
 623 // Perform a simple check to determine if the browser is capable of
 624 // converting a NodeList to an array using builtin methods.
 625 try {
 626         Array.prototype.slice.call( document.documentElement.childNodes );
 627
 628 // Provide a fallback method if it does not work
 629 } catch(e){
 630         makeArray = function(array, results) {
 631                 var ret = results || [];
 632
 633                 if ( array instanceof Array ) {
 634                         Array.prototype.push.apply( ret, array );
 635                 } else {
 636                         if ( typeof array.length === "number" ) {
 637                                 for ( var i = 0, l = array.length; i < l; i++ ) {
 638                                         ret.push( array[i] );
 639                                 }
 640                         } else {
 641                                 for ( var i = 0; array[i]; i++ ) {
 642                                         ret.push( array[i] );
 643                                 }
 644                         }
 645                 }
 646
 647                 return ret;
 648         };
 649 }
 650
 651 // Check to see if the browser returns elements by name when
 652 // querying by getElementById (and provide a workaround)
 653 (function(){
 654         // We're going to inject a fake input element with a specified name
 655         var form = document.createElement("form"),
 656                 id = "script" + (new Date).getTime();
 657         form.innerHTML = "<input name='" + id + "'/>";
 658
 659         // Inject it into the root element, check its status, and remove it quickly
 660         var root = document.documentElement;
 661         root.insertBefore( form, root.firstChild );
 662
 663         // The workaround has to do additional checks after a getElementById
 664         // Which slows things down for other browsers (hence the branching)
 665         if ( !!document.getElementById( id ) ) {
 666                 Expr.find.ID = function(match, context){
 667                         if ( context.getElementById ) {
 668                                 var m = context.getElementById(match[1]);
 669                                 return m ? m.id === match[1] || m.getAttributeNode && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
 670                         }
 671                 };
 672
 673                 Expr.filter.ID = function(elem, match){
 674                         var node = elem.getAttributeNode && elem.getAttributeNode("id");
 675                         return elem.nodeType === 1 && node && node.nodeValue === match;
 676                 };
 677         }
 678
 679         root.removeChild( form );
 680 })();
 681
 682 // Check to see if the browser returns only elements
 683 // when doing getElementsByTagName("*")
 684 (function(){
 685         // Create a fake element
 686         var div = document.createElement("div");
 687         div.appendChild( document.createComment("") );
 688
 689         // Make sure no comments are found
 690         if ( div.getElementsByTagName("*").length > 0 ) {
 691                 Expr.find.TAG = function(match, context){
 692                         var results = context.getElementsByTagName(match[1]);
 693
 694                         // Filter out possible comments
 695                         if ( match[1] === "*" ) {
 696                                 var tmp = [];
 697
 698                                 for ( var i = 0; results[i]; i++ ) {
 699                                         if ( results[i].nodeType === 1 ) {
 700                                                 tmp.push( results[i] );
 701                                         }
 702                                 }
 703
 704                                 results = tmp;
 705                         }
 706
 707                         return results;
 708                 };
 709         }
 710 })();
 711
 712 if ( document.querySelectorAll ) (function(){
 713         var oldSizzle = Sizzle;
 714
 715         Sizzle = function(query, context, extra){
 716                 context = context || document;
 717
 718                 if ( context.nodeType === 9 ) {
 719                         try {
 720                                 return makeArray( context.querySelectorAll(query) );
 721                         } catch(e){}
 722                 }
 723
 724                 return oldSizzle(query, context, extra);
 725         };
 726
 727         Sizzle.find = oldSizzle.find;
 728         Sizzle.filter = oldSizzle.filter;
 729         Sizzle.selectors = oldSizzle.selectors;
 730 })();
 731
 732 if ( document.documentElement.getElementsByClassName ) {
 733         Expr.order.splice(1, 0, "CLASS");
 734         Expr.find.CLASS = function(match, context) {
 735                 return context.getElementsByClassName(match[1]);
 736         };
 737 }
 738
 739 function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck ) {
 740         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 741                 var elem = checkSet[i];
 742                 if ( elem ) {
 743                         elem = elem[dir]
 744                         var match = false;
 745
 746                         while ( elem && elem.nodeType ) {
 747                                 var done = elem[doneName];
 748                                 if ( done ) {
 749                                         match = checkSet[ done ];
 750                                         break;
 751                                 }
 752
 753                                 if ( elem.nodeType === 1 )
 754                                         elem[doneName] = i;
 755
 756                                 if ( elem.nodeName === cur ) {
 757                                         match = elem;
 758                                         break;
 759                                 }
 760
 761                                 elem = elem[dir];
 762                         }
 763
 764                         checkSet[i] = match;
 765                 }
 766         }
 767 }
 768
 769 function dirCheck( dir, cur, doneName, checkSet, nodeCheck ) {
 770         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 771                 var elem = checkSet[i];
 772                 if ( elem ) {
 773                         elem = elem[dir]
 774                         var match = false;
 775
 776                         while ( elem && elem.nodeType ) {
 777                                 if ( elem[doneName] ) {
 778                                         match = checkSet[ elem[doneName] ];
 779                                         break;
 780                                 }
 781
 782                                 if ( elem.nodeType === 1 ) {
 783                                         elem[doneName] = i;
 784
 785                                         if ( typeof cur !== "string" ) {
 786                                                 if ( elem === cur ) {
 787                                                         match = true;
 788                                                         break;
 789                                                 }
 790
 791                                         } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
 792                                                 match = elem;
 793                                                 break;
 794                                         }
 795                                 }
 796
 797                                 elem = elem[dir];
 798                         }
 799
 800                         checkSet[i] = match;
 801                 }
 802         }
 803 }
 804
 805 var contains = document.compareDocumentPosition ?  function(a, b){
 806         return a.compareDocumentPosition(b) & 16;
 807 } : function(a, b){
 808         return a !== b && a.contains(b);
 809 };
 810
 811 // EXPOSE
 812 jQuery.find = Sizzle;
 813 jQuery.filter = Sizzle.filter;
 814 jQuery.expr = Sizzle.selectors;
 815 jQuery.expr[":"] = jQuery.expr.filters;
 816
 817 Sizzle.selectors.filters.hidden = function(elem){
 818         return "hidden" === elem.type ||
 819                 jQuery.css(elem, "display") === "none" ||
 820                 jQuery.css(elem, "visibility") === "hidden";
 821 };
 822
 823 Sizzle.selectors.filters.visible = function(elem){
 824         return "hidden" !== elem.type &&
 825                 jQuery.css(elem, "display") !== "none" &&
 826                 jQuery.css(elem, "visibility") !== "hidden";
 827 };
 828
 829 jQuery.multiFilter = function( expr, elems, not ) {
 830         if ( not ) {
 831                 return jQuery.multiFilter( ":not(" + expr + ")", elems );
 832         }
 833
 834         var exprs = expr.split(/\s*,\s*/), cur = [];
 835
 836         for ( var i = 0; i < exprs.length; i++ ) {
 837                 cur = jQuery.merge( cur, jQuery.filter( exprs[i], elems ) );
 838         }
 839
 840         return cur;
 841 };
 842
 843 jQuery.dir = function( elem, dir ){
 844         var matched = [], cur = elem[dir];
 845         while ( cur && cur != document ) {
 846                 if ( cur.nodeType == 1 )
 847                         matched.push( cur );
 848                 cur = cur[dir];
 849         }
 850         return matched;
 851 };
 852
 853 jQuery.nth = function(cur, result, dir, elem){
 854         result = result || 1;
 855         var num = 0;
 856
 857         for ( ; cur; cur = cur[dir] )
 858                 if ( cur.nodeType == 1 && ++num == result )
 859                         break;
 860
 861         return cur;
 862 };
 863
 864 jQuery.sibling = function(n, elem){
 865         var r = [];
 866
 867         for ( ; n; n = n.nextSibling ) {
 868                 if ( n.nodeType == 1 && n != elem )
 869                         r.push( n );
 870         }
 871
 872         return r;
 873 };
 874
 875 return;
 876
 877 window.Sizzle = Sizzle;
 878
 879 })();