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