src/traversing.js

   1 (function( jQuery ) {
   2
   3 var runtil = /Until$/,
   4         rparentsprev = /^(?:parents|prevUntil|prevAll)/,
   5         // Note: This RegExp should be improved, or likely pulled from Sizzle
   6         rmultiselector = /,/,
   7         isSimple = /^.[^:#\[\.,]*$/,
   8         slice = Array.prototype.slice,
   9         POS = jQuery.expr.match.POS,
  10         // methods guaranteed to produce a unique set when starting from a unique set
  11         guaranteedUnique = {
  12                 children: true,
  13                 contents: true,
  14                 next: true,
  15                 prev: true
  16         };
  17
  18 jQuery.fn.extend({
  19         find: function( selector ) {
  20                 var ret = this.pushStack( "", "find", selector ),
  21                         length = 0;
  22
  23                 for ( var i = 0, l = this.length; i < l; i++ ) {
  24                         length = ret.length;
  25                         jQuery.find( selector, this[i], ret );
  26
  27                         if ( i > 0 ) {
  28                                 // Make sure that the results are unique
  29                                 for ( var n = length; n < ret.length; n++ ) {
  30                                         for ( var r = 0; r < length; r++ ) {
  31                                                 if ( ret[r] === ret[n] ) {
  32                                                         ret.splice(n--, 1);
  33                                                         break;
  34                                                 }
  35                                         }
  36                                 }
  37                         }
  38                 }
  39
  40                 return ret;
  41         },
  42
  43         has: function( target ) {
  44                 var targets = jQuery( target );
  45                 return this.filter(function() {
  46                         for ( var i = 0, l = targets.length; i < l; i++ ) {
  47                                 if ( jQuery.contains( this, targets[i] ) ) {
  48                                         return true;
  49                                 }
  50                         }
  51                 });
  52         },
  53
  54         not: function( selector ) {
  55                 return this.pushStack( winnow(this, selector, false), "not", selector);
  56         },
  57
  58         filter: function( selector ) {
  59                 return this.pushStack( winnow(this, selector, true), "filter", selector );
  60         },
  61
  62         is: function( selector ) {
  63                 return !!selector && jQuery.filter( selector, this ).length > 0;
  64         },
  65
  66         closest: function( selectors, context ) {
  67                 var ret = [], i, l, cur = this[0];
  68
  69                 if ( jQuery.isArray( selectors ) ) {
  70                         var match, selector,
  71                                 matches = {},
  72                                 level = 1;
  73
  74                         if ( cur && selectors.length ) {
  75                                 for ( i = 0, l = selectors.length; i < l; i++ ) {
  76                                         selector = selectors[i];
  77
  78                                         if ( !matches[selector] ) {
  79                                                 matches[selector] = jQuery.expr.match.POS.test( selector ) ?
  80                                                         jQuery( selector, context || this.context ) :
  81                                                         selector;
  82                                         }
  83                                 }
  84
  85                                 while ( cur && cur.ownerDocument && cur !== context ) {
  86                                         for ( selector in matches ) {
  87                                                 match = matches[selector];
  88
  89                                                 if ( match.jquery ? match.index(cur) > -1 : jQuery(cur).is(match) ) {
  90                                                         ret.push({ selector: selector, elem: cur, level: level });
  91                                                 }
  92                                         }
  93
  94                                         cur = cur.parentNode;
  95                                         level++;
  96                                 }
  97                         }
  98
  99                         return ret;
 100                 }
 101
 102                 var pos = POS.test( selectors ) ?
 103                         jQuery( selectors, context || this.context ) : null;
 104
 105                 for ( i = 0, l = this.length; i < l; i++ ) {
 106                         cur = this[i];
 107
 108                         while ( cur ) {
 109                                 if ( pos ? pos.index(cur) > -1 : jQuery.find.matchesSelector(cur, selectors) ) {
 110                                         ret.push( cur );
 111                                         break;
 112
 113                                 } else {
 114                                         cur = cur.parentNode;
 115                                         if ( !cur || !cur.ownerDocument || cur === context ) {
 116                                                 break;
 117                                         }
 118                                 }
 119                         }
 120                 }
 121
 122                 ret = ret.length > 1 ? jQuery.unique(ret) : ret;
 123
 124                 return this.pushStack( ret, "closest", selectors );
 125         },
 126
 127         // Determine the position of an element within
 128         // the matched set of elements
 129         index: function( elem ) {
 130                 if ( !elem || typeof elem === "string" ) {
 131                         return jQuery.inArray( this[0],
 132                                 // If it receives a string, the selector is used
 133                                 // If it receives nothing, the siblings are used
 134                                 elem ? jQuery( elem ) : this.parent().children() );
 135                 }
 136                 // Locate the position of the desired element
 137                 return jQuery.inArray(
 138                         // If it receives a jQuery object, the first element is used
 139                         elem.jquery ? elem[0] : elem, this );
 140         },
 141
 142         add: function( selector, context ) {
 143                 var set = typeof selector === "string" ?
 144                                 jQuery( selector, context || this.context ) :
 145                                 jQuery.makeArray( selector ),
 146                         all = jQuery.merge( this.get(), set );
 147
 148                 return this.pushStack( isDisconnected( set[0] ) || isDisconnected( all[0] ) ?
 149                         all :
 150                         jQuery.unique( all ) );
 151         },
 152
 153         andSelf: function() {
 154                 return this.add( this.prevObject );
 155         }
 156 });
 157
 158 // A painfully simple check to see if an element is disconnected
 159 // from a document (should be improved, where feasible).
 160 function isDisconnected( node ) {
 161         return !node || !node.parentNode || node.parentNode.nodeType === 11;
 162 }
 163
 164 jQuery.each({
 165         parent: function( elem ) {
 166                 var parent = elem.parentNode;
 167                 return parent && parent.nodeType !== 11 ? parent : null;
 168         },
 169         parents: function( elem ) {
 170                 return jQuery.dir( elem, "parentNode" );
 171         },
 172         parentsUntil: function( elem, i, until ) {
 173                 return jQuery.dir( elem, "parentNode", until );
 174         },
 175         next: function( elem ) {
 176                 return jQuery.nth( elem, 2, "nextSibling" );
 177         },
 178         prev: function( elem ) {
 179                 return jQuery.nth( elem, 2, "previousSibling" );
 180         },
 181         nextAll: function( elem ) {
 182                 return jQuery.dir( elem, "nextSibling" );
 183         },
 184         prevAll: function( elem ) {
 185                 return jQuery.dir( elem, "previousSibling" );
 186         },
 187         nextUntil: function( elem, i, until ) {
 188                 return jQuery.dir( elem, "nextSibling", until );
 189         },
 190         prevUntil: function( elem, i, until ) {
 191                 return jQuery.dir( elem, "previousSibling", until );
 192         },
 193         siblings: function( elem ) {
 194                 return jQuery.sibling( elem.parentNode.firstChild, elem );
 195         },
 196         children: function( elem ) {
 197                 return jQuery.sibling( elem.firstChild );
 198         },
 199         contents: function( elem ) {
 200                 return jQuery.nodeName( elem, "iframe" ) ?
 201                         elem.contentDocument || elem.contentWindow.document :
 202                         jQuery.makeArray( elem.childNodes );
 203         }
 204 }, function( name, fn ) {
 205         jQuery.fn[ name ] = function( until, selector ) {
 206                 var ret = jQuery.map( this, fn, until ),
 207         args = slice.call(arguments);
 208
 209                 if ( !runtil.test( name ) ) {
 210                         selector = until;
 211                 }
 212
 213                 if ( selector && typeof selector === "string" ) {
 214                         ret = jQuery.filter( selector, ret );
 215                 }
 216
 217                 ret = this.length > 1 && !guaranteedUnique[ name ] ? jQuery.unique( ret ) : ret;
 218
 219                 if ( (this.length > 1 || rmultiselector.test( selector )) && rparentsprev.test( name ) ) {
 220                         ret = ret.reverse();
 221                 }
 222
 223                 return this.pushStack( ret, name, args.join(",") );
 224         };
 225 });
 226
 227 jQuery.extend({
 228         filter: function( expr, elems, not ) {
 229                 if ( not ) {
 230                         expr = ":not(" + expr + ")";
 231                 }
 232
 233                 return elems.length === 1 ?
 234                         jQuery.find.matchesSelector(elems[0], expr) ? [ elems[0] ] : [] :
 235                         jQuery.find.matches(expr, elems);
 236         },
 237
 238         dir: function( elem, dir, until ) {
 239                 var matched = [],
 240                         cur = elem[ dir ];
 241
 242                 while ( cur && cur.nodeType !== 9 && (until === undefined || cur.nodeType !== 1 || !jQuery( cur ).is( until )) ) {
 243                         if ( cur.nodeType === 1 ) {
 244                                 matched.push( cur );
 245                         }
 246                         cur = cur[dir];
 247                 }
 248                 return matched;
 249         },
 250
 251         nth: function( cur, result, dir, elem ) {
 252                 result = result || 1;
 253                 var num = 0;
 254
 255                 for ( ; cur; cur = cur[dir] ) {
 256                         if ( cur.nodeType === 1 && ++num === result ) {
 257                                 break;
 258                         }
 259                 }
 260
 261                 return cur;
 262         },
 263
 264         sibling: function( n, elem ) {
 265                 var r = [];
 266
 267                 for ( ; n; n = n.nextSibling ) {
 268                         if ( n.nodeType === 1 && n !== elem ) {
 269                                 r.push( n );
 270                         }
 271                 }
 272
 273                 return r;
 274         }
 275 });
 276
 277 // Implement the identical functionality for filter and not
 278 function winnow( elements, qualifier, keep ) {
 279         if ( jQuery.isFunction( qualifier ) ) {
 280                 return jQuery.grep(elements, function( elem, i ) {
 281                         var retVal = !!qualifier.call( elem, i, elem );
 282                         return retVal === keep;
 283                 });
 284
 285         } else if ( qualifier.nodeType ) {
 286                 return jQuery.grep(elements, function( elem, i ) {
 287                         return (elem === qualifier) === keep;
 288                 });
 289
 290         } else if ( typeof qualifier === "string" ) {
 291                 var filtered = jQuery.grep(elements, function( elem ) {
 292                         return elem.nodeType === 1;
 293                 });
 294
 295                 if ( isSimple.test( qualifier ) ) {
 296                         return jQuery.filter(qualifier, filtered, !keep);
 297                 } else {
 298                         qualifier = jQuery.filter( qualifier, filtered );
 299                 }
 300         }
 301
 302         return jQuery.grep(elements, function( elem, i ) {
 303                 return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
 304         });
 305 }
 306
 307 })( jQuery );