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.filter(qualifier, filtered, !keep);
  14                 else qualifier = jQuery.filter( 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
  57                 return this.map(function(){
  58                         var cur = this, closer = 0;
  59                         while ( cur && cur.ownerDocument && cur !== context ) {
  60                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
  61                     jQuery.lastCloser = closer;
  62                                         return cur;
  63                                 }
  64                                 cur = cur.parentNode;
  65                                 closer++;
  66                         }
  67             jQuery.lastCloser = -1;
  68             return null;
  69                 });
  70         },
  71
  72         add: function( selector, context ) {
  73                 var set = typeof selector === "string" ?
  74                                 jQuery( selector, context || this.context ) :
  75                                 jQuery.makeArray( selector ),
  76                         all = jQuery.merge( this.get(), set );
  77
  78                 return this.pushStack( set[0] && (set[0].setInterval || set[0].nodeType === 9 || (set[0].parentNode && set[0].parentNode.nodeType !== 11)) ?
  79                         jQuery.unique( all ) :
  80                         all );
  81         },
  82
  83         eq: function( i ) {
  84                 return i === -1 ?
  85                         this.slice( i ) :
  86                         this.slice( i, +i + 1 );
  87         },
  88
  89         first: function() {
  90                 return this.eq( 0 );
  91         },
  92
  93         last: function() {
  94                 return this.eq( -1 );
  95         },
  96
  97         slice: function() {
  98                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
  99                         "slice", Array.prototype.slice.call(arguments).join(",") );
 100         },
 101
 102         map: function( callback ) {
 103                 return this.pushStack( jQuery.map(this, function(elem, i){
 104                         return callback.call( elem, i, elem );
 105                 }));
 106         },
 107
 108         andSelf: function() {
 109                 return this.add( this.prevObject );
 110         },
 111
 112         end: function() {
 113                 return this.prevObject || jQuery(null);
 114         }
 115 });
 116
 117 jQuery.each({
 118         parent: function(elem){return elem.parentNode;},
 119         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 120         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 121         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 122         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 123         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 124         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 125         children: function(elem){return jQuery.sibling(elem.firstChild);},
 126         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 127 }, function(name, fn){
 128         jQuery.fn[ name ] = function( selector ) {
 129                 var ret = jQuery.map( this, fn );
 130
 131                 if ( selector && typeof selector === "string" ) {
 132                         ret = jQuery.filter( selector, ret );
 133                 }
 134
 135                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 136
 137                 if ( name === "parents" && this.length > 1 ) {
 138                         ret = ret.reverse();
 139                 }
 140
 141                 return this.pushStack( ret, name, selector );
 142         };
 143 });
 144
 145 jQuery.extend({
 146         filter: function( expr, elems, not ) {
 147                 if ( not ) {
 148                         expr = ":not(" + expr + ")";
 149                 }
 150
 151                 return jQuery.find.matches(expr, elems);
 152         },
 153
 154         dir: function( elem, dir ) {
 155                 var matched = [], cur = elem[dir];
 156                 while ( cur && cur.nodeType !== 9 ) {
 157                         if ( cur.nodeType === 1 ) {
 158                                 matched.push( cur );
 159                         }
 160                         cur = cur[dir];
 161                 }
 162                 return matched;
 163         },
 164
 165         nth: function( cur, result, dir, elem ) {
 166                 result = result || 1;
 167                 var num = 0;
 168
 169                 for ( ; cur; cur = cur[dir] ) {
 170                         if ( cur.nodeType === 1 && ++num === result ) {
 171                                 break;
 172                         }
 173                 }
 174
 175                 return cur;
 176         },
 177
 178         sibling: function( n, elem ) {
 179                 var r = [];
 180
 181                 for ( ; n; n = n.nextSibling ) {
 182                         if ( n.nodeType === 1 && n !== elem ) {
 183                                 r.push( n );
 184                         }
 185                 }
 186
 187                 return r;
 188         }
 189 });