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