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