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 ) ?
  56                         jQuery( selector, context || this.context ) : null;
  57
  58                 return this.map(function(){
  59                         var cur = this, closer = 0;
  60                         while ( cur && cur.ownerDocument && cur !== context ) {
  61                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
  62                                         jQuery.lastCloser = closer;
  63                                         return cur;
  64                                 }
  65                                 cur = cur.parentNode;
  66                                 closer++;
  67                         }
  68                         jQuery.lastCloser = -1;
  69                         return null;
  70                 });
  71         },
  72
  73         add: function( selector, context ) {
  74                 var set = typeof selector === "string" ?
  75                                 jQuery( selector, context || this.context ) :
  76                                 jQuery.makeArray( selector ),
  77                         all = jQuery.merge( this.get(), set );
  78
  79                 return this.pushStack( set[0] && (set[0].setInterval || set[0].nodeType === 9 || (set[0].parentNode && set[0].parentNode.nodeType !== 11)) ?
  80                         jQuery.unique( all ) :
  81                         all );
  82         },
  83
  84         eq: function( i ) {
  85                 return i === -1 ?
  86                         this.slice( i ) :
  87                         this.slice( i, +i + 1 );
  88         },
  89
  90         first: function() {
  91                 return this.eq( 0 );
  92         },
  93
  94         last: function() {
  95                 return this.eq( -1 );
  96         },
  97
  98         slice: function() {
  99                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 100                         "slice", Array.prototype.slice.call(arguments).join(",") );
 101         },
 102
 103         map: function( callback ) {
 104                 return this.pushStack( jQuery.map(this, function(elem, i){
 105                         return callback.call( elem, i, elem );
 106                 }));
 107         },
 108
 109         andSelf: function() {
 110                 return this.add( this.prevObject );
 111         },
 112
 113         end: function() {
 114                 return this.prevObject || jQuery(null);
 115         }
 116 });
 117
 118 jQuery.each({
 119         parent: function(elem){return elem.parentNode;},
 120         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 121         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 122         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 123         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 124         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 125         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 126         children: function(elem){return jQuery.sibling(elem.firstChild);},
 127         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 128 }, function(name, fn){
 129         jQuery.fn[ name ] = function( selector ) {
 130                 var ret = jQuery.map( this, fn );
 131
 132                 if ( selector && typeof selector === "string" ) {
 133                         ret = jQuery.filter( selector, ret );
 134                 }
 135
 136                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 137
 138                 if ( name === "parents" && this.length > 1 ) {
 139                         ret = ret.reverse();
 140                 }
 141
 142                 return this.pushStack( ret, name, selector );
 143         };
 144 });
 145
 146 jQuery.extend({
 147         filter: function( expr, elems, not ) {
 148                 if ( not ) {
 149                         expr = ":not(" + expr + ")";
 150                 }
 151
 152                 return jQuery.find.matches(expr, elems);
 153         },
 154
 155         dir: function( elem, dir ) {
 156                 var matched = [], cur = elem[dir];
 157                 while ( cur && cur.nodeType !== 9 ) {
 158                         if ( cur.nodeType === 1 ) {
 159                                 matched.push( cur );
 160                         }
 161                         cur = cur[dir];
 162                 }
 163                 return matched;
 164         },
 165
 166         nth: function( cur, result, dir, elem ) {
 167                 result = result || 1;
 168                 var num = 0;
 169
 170                 for ( ; cur; cur = cur[dir] ) {
 171                         if ( cur.nodeType === 1 && ++num === result ) {
 172                                 break;
 173                         }
 174                 }
 175
 176                 return cur;
 177         },
 178
 179         sibling: function( n, elem ) {
 180                 var r = [];
 181
 182                 for ( ; n; n = n.nextSibling ) {
 183                         if ( n.nodeType === 1 && n !== elem ) {
 184                                 r.push( n );
 185                         }
 186                 }
 187
 188                 return r;
 189         }
 190 });