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