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