src/traversing.js

   1 var 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( winnow(this, selector, false), "not", selector);
  48         },
  49
  50         filter: function( selector ) {
  51                 return this.pushStack( winnow(this, selector, true), "filter", selector );
  52         },
  53
  54         closest: function( selector, context ) {
  55                 var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
  56                         closer = 0;
  57
  58                 return this.map(function(){
  59                         var cur = this;
  60                         while ( cur && cur.ownerDocument && cur !== context ) {
  61                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
  62                                         jQuery.data(cur, "closest", closer);
  63                                         return cur;
  64                                 }
  65                                 cur = cur.parentNode;
  66                                 closer++;
  67                         }
  68                 });
  69         },
  70
  71         add: function( selector ) {
  72                 return this.pushStack( jQuery.unique( jQuery.merge(
  73                         this.get(),
  74                         typeof selector === "string" ?
  75                                 jQuery( selector ) :
  76                                 jQuery.makeArray( selector )
  77                 )));
  78         },
  79
  80         eq: function( i ) {
  81                 return i === -1 ?
  82                         this.slice( i ) :
  83                         this.slice( i, +i + 1 );
  84         },
  85
  86         first: function() {
  87                 return this.eq( 0 );
  88         },
  89
  90         last: function() {
  91                 return this.eq( -1 );
  92         },
  93
  94         slice: function() {
  95                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
  96                         "slice", Array.prototype.slice.call(arguments).join(",") );
  97         },
  98
  99         map: function( callback ) {
 100                 return this.pushStack( jQuery.map(this, function(elem, i){
 101                         return callback.call( elem, i, elem );
 102                 }));
 103         },
 104
 105         andSelf: function() {
 106                 return this.add( this.prevObject );
 107         },
 108
 109         end: function() {
 110                 return this.prevObject || jQuery(null);
 111         }
 112 });
 113
 114 jQuery.each({
 115         parent: function(elem){return elem.parentNode;},
 116         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 117         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 118         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 119         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 120         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 121         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 122         children: function(elem){return jQuery.sibling(elem.firstChild);},
 123         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 124 }, function(name, fn){
 125         jQuery.fn[ name ] = function( selector ) {
 126                 var ret = jQuery.map( this, fn );
 127
 128                 if ( selector && typeof selector == "string" )
 129                         ret = jQuery.multiFilter( selector, ret );
 130
 131                 return this.pushStack( jQuery.unique( ret ), name, selector );
 132         };
 133 });