src/traversing.js

   1 var runtil = /Until$/,
   2         rparentsprev = /^(?:parents|prevUntil|prevAll)/,
   3         // Note: This RegExp should be improved, or likely pulled from Sizzle
   4         rmultiselector = /,/;
   5
   6 // Implement the identical functionality for filter and not
   7 var winnow = function( elements, qualifier, keep ) {
   8         if ( jQuery.isFunction( qualifier ) ) {
   9                 return jQuery.grep(elements, function( elem, i ) {
  10                         return !!qualifier.call( elem, i, elem ) === keep;
  11                 });
  12
  13         } else if ( qualifier.nodeType ) {
  14                 return jQuery.grep(elements, function( elem, i ) {
  15                         return (elem === qualifier) === keep;
  16                 });
  17
  18         } else if ( typeof qualifier === "string" ) {
  19                 var filtered = jQuery.grep(elements, function( elem ) {
  20                         return elem.nodeType === 1;
  21                 });
  22
  23                 if ( isSimple.test( qualifier ) ) {
  24                         return jQuery.filter(qualifier, filtered, !keep);
  25                 } else {
  26                         qualifier = jQuery.filter( qualifier, filtered );
  27                 }
  28         }
  29
  30         return jQuery.grep(elements, function( elem, i ) {
  31                 return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
  32         });
  33 };
  34
  35 jQuery.fn.extend({
  36         find: function( selector ) {
  37                 var ret = this.pushStack( "", "find", selector ), length = 0;
  38
  39                 for ( var i = 0, l = this.length; i < l; i++ ) {
  40                         length = ret.length;
  41                         jQuery.find( selector, this[i], ret );
  42
  43                         if ( i > 0 ) {
  44                                 // Make sure that the results are unique
  45                                 for ( var n = length; n < ret.length; n++ ) {
  46                                         for ( var r = 0; r < length; r++ ) {
  47                                                 if ( ret[r] === ret[n] ) {
  48                                                         ret.splice(n--, 1);
  49                                                         break;
  50                                                 }
  51                                         }
  52                                 }
  53                         }
  54                 }
  55
  56                 return ret;
  57         },
  58
  59         has: function( target ) {
  60                 var targets = jQuery( target );
  61                 return this.filter(function() {
  62                         for ( var i = 0, l = targets.length; i < l; i++ ) {
  63                                 if ( jQuery.contains( this, targets[i] ) ) {
  64                                         return true;
  65                                 }
  66                         }
  67                 });
  68         },
  69
  70         not: function( selector ) {
  71                 return this.pushStack( winnow(this, selector, false), "not", selector);
  72         },
  73
  74         filter: function( selector ) {
  75                 return this.pushStack( winnow(this, selector, true), "filter", selector );
  76         },
  77
  78         is: function( selector ) {
  79                 return !!selector && jQuery.filter( selector, this ).length > 0;
  80         },
  81
  82         closest: function( selectors, context ) {
  83                 if ( jQuery.isArray( selectors ) ) {
  84                         var ret = [], cur = this[0], match, matches = {}, selector, level = 1;
  85
  86                         if ( cur && selectors.length ) {
  87                                 for ( var i = 0, l = selectors.length; i < l; i++ ) {
  88                                         selector = selectors[i];
  89
  90                                         if ( !matches[selector] ) {
  91                                                 matches[selector] = jQuery.expr.match.POS.test( selector ) ?
  92                                                         jQuery( selector, context || this.context ) :
  93                                                         selector;
  94                                         }
  95                                 }
  96
  97                                 while ( cur && cur.ownerDocument && cur !== context ) {
  98                                         for ( selector in matches ) {
  99                                                 match = matches[selector];
 100
 101                                                 if ( match.jquery ? match.index(cur) > -1 : jQuery(cur).is(match) ) {
 102                                                         ret.push({ selector: selector, elem: cur, level: level });
 103                                                 }
 104                                         }
 105                                         cur = cur.parentNode;
 106                                         level++;
 107                                 }
 108                         }
 109
 110                         return ret;
 111                 }
 112
 113                 var pos = jQuery.expr.match.POS.test( selectors ) ?
 114                         jQuery( selectors, context || this.context ) : null;
 115
 116                 return this.map(function( i, cur ) {
 117                         while ( cur && cur.ownerDocument && cur !== context ) {
 118                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selectors) ) {
 119                                         return cur;
 120                                 }
 121                                 cur = cur.parentNode;
 122                         }
 123                         return null;
 124                 });
 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
 208                 if ( !runtil.test( name ) ) {
 209                         selector = until;
 210                 }
 211
 212                 if ( selector && typeof selector === "string" ) {
 213                         ret = jQuery.filter( selector, ret );
 214                 }
 215
 216                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 217
 218                 if ( (this.length > 1 || rmultiselector.test( selector )) && rparentsprev.test( name ) ) {
 219                         ret = ret.reverse();
 220                 }
 221
 222                 return this.pushStack( ret, name, slice.call(arguments).join(",") );
 223         };
 224 });
 225
 226 jQuery.extend({
 227         filter: function( expr, elems, not ) {
 228                 if ( not ) {
 229                         expr = ":not(" + expr + ")";
 230                 }
 231
 232                 return jQuery.find.matches(expr, elems);
 233         },
 234
 235         dir: function( elem, dir, until ) {
 236                 var matched = [], cur = elem[dir];
 237                 while ( cur && cur.nodeType !== 9 && (until === undefined || cur.nodeType !== 1 || !jQuery( cur ).is( until )) ) {
 238                         if ( cur.nodeType === 1 ) {
 239                                 matched.push( cur );
 240                         }
 241                         cur = cur[dir];
 242                 }
 243                 return matched;
 244         },
 245
 246         nth: function( cur, result, dir, elem ) {
 247                 result = result || 1;
 248                 var num = 0;
 249
 250                 for ( ; cur; cur = cur[dir] ) {
 251                         if ( cur.nodeType === 1 && ++num === result ) {
 252                                 break;
 253                         }
 254                 }
 255
 256                 return cur;
 257         },
 258
 259         sibling: function( n, elem ) {
 260                 var r = [];
 261
 262                 for ( ; n; n = n.nextSibling ) {
 263                         if ( n.nodeType === 1 && n !== elem ) {
 264                                 r.push( n );
 265                         }
 266                 }
 267
 268                 return r;
 269         }
 270 });