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