src/traversing.js

   1 jQuery.winnow = function( elements, qualifier, keep ) {
   2         if(jQuery.isFunction( qualifier )) {
   3                 return jQuery.grep(elements, function(elem, i) {
   4                         return !!qualifier.call( elem, i ) === keep;
   5                 });
   6         } else if( qualifier.nodeType ) {
   7                 return jQuery.grep(elements, function(elem, i) {
   8                         return (elem === qualifier) === keep;
   9                 })
  10         } else if( typeof qualifier === "string" ) {
  11                 var filtered = jQuery.grep(elements, function(elem) { return elem.nodeType === 1 });
  12
  13                 if(isSimple.test( qualifier )) return jQuery.multiFilter(qualifier, filtered, !keep);
  14                 else qualifier = jQuery.multiFilter( qualifier, elements );
  15         }
  16
  17         return jQuery.grep(elements, function(elem, i) {
  18                 return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
  19         });
  20 }
  21
  22 jQuery.fn.extend({
  23         find: function( selector ) {
  24                 var ret = this.pushStack( "", "find", selector ), length = 0;
  25
  26                 for ( var i = 0, l = this.length; i < l; i++ ) {
  27                         length = ret.length;
  28                         jQuery.find( selector, this[i], ret );
  29
  30                         if ( i > 0 ) {
  31                                 // Make sure that the results are unique
  32                                 for ( var n = length; n < ret.length; n++ ) {
  33                                         for ( var r = 0; r < length; r++ ) {
  34                                                 if ( ret[r] === ret[n] ) {
  35                                                         ret.splice(n--, 1);
  36                                                         break;
  37                                                 }
  38                                         }
  39                                 }
  40                         }
  41                 }
  42
  43                 return ret;
  44         },
  45
  46         not: function( selector ) {
  47                 return this.pushStack( jQuery.winnow(this, selector, false), "not", selector);
  48         },
  49
  50         filter: function( selector ) {
  51                 return this.pushStack( jQuery.winnow(this, selector, true), "filter", selector );
  52         },
  53
  54         closest: function( selector ) {
  55                 var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
  56                         closer = 0,
  57                         context = this.context;
  58
  59                 return this.map(function(){
  60                         var cur = this;
  61                         while ( cur && cur.ownerDocument && cur !== context ) {
  62                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
  63                                         jQuery.data(cur, "closest", closer);
  64                                         return cur;
  65                                 }
  66                                 cur = cur.parentNode;
  67                                 closer++;
  68                         }
  69                 });
  70         },
  71
  72         add: function( selector ) {
  73                 return this.pushStack( jQuery.unique( jQuery.merge(
  74                         this.get(),
  75                         typeof selector === "string" ?
  76                                 jQuery( selector ) :
  77                                 jQuery.makeArray( selector )
  78                 )));
  79         },
  80
  81         eq: function( i ) {
  82                 return this.slice( i, +i + 1 );
  83         },
  84
  85         slice: function() {
  86                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
  87                         "slice", Array.prototype.slice.call(arguments).join(",") );
  88         },
  89
  90         map: function( callback ) {
  91                 return this.pushStack( jQuery.map(this, function(elem, i){
  92                         return callback.call( elem, i, elem );
  93                 }));
  94         },
  95
  96         andSelf: function() {
  97                 return this.add( this.prevObject );
  98         },
  99
 100         end: function() {
 101                 return this.prevObject || jQuery(null);
 102         }
 103 });
 104
 105 jQuery.each({
 106         parent: function(elem){return elem.parentNode;},
 107         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 108         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 109         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 110         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 111         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 112         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 113         children: function(elem){return jQuery.sibling(elem.firstChild);},
 114         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 115 }, function(name, fn){
 116         jQuery.fn[ name ] = function( selector ) {
 117                 var ret = jQuery.map( this, fn );
 118
 119                 if ( selector && typeof selector == "string" )
 120                         ret = jQuery.multiFilter( selector, ret );
 121
 122                 return this.pushStack( jQuery.unique( ret ), name, selector );
 123         };
 124 });