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 )) {
  14                         return jQuery.filter(qualifier, filtered, !keep);
  15                 } else {
  16                         qualifier = jQuery.filter( qualifier, elements );
  17                 }
  18         }
  19
  20         return jQuery.grep(elements, function(elem, i) {
  21                 return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
  22         });
  23 }
  24
  25 jQuery.fn.extend({
  26         find: function( selector ) {
  27                 var ret = this.pushStack( "", "find", selector ), length = 0;
  28
  29                 for ( var i = 0, l = this.length; i < l; i++ ) {
  30                         length = ret.length;
  31                         jQuery.find( selector, this[i], ret );
  32
  33                         if ( i > 0 ) {
  34                                 // Make sure that the results are unique
  35                                 for ( var n = length; n < ret.length; n++ ) {
  36                                         for ( var r = 0; r < length; r++ ) {
  37                                                 if ( ret[r] === ret[n] ) {
  38                                                         ret.splice(n--, 1);
  39                                                         break;
  40                                                 }
  41                                         }
  42                                 }
  43                         }
  44                 }
  45
  46                 return ret;
  47         },
  48
  49         not: function( selector ) {
  50                 return this.pushStack( winnow(this, selector, false), "not", selector);
  51         },
  52
  53         filter: function( selector ) {
  54                 return this.pushStack( winnow(this, selector, true), "filter", selector );
  55         },
  56
  57         closest: function( selector, context ) {
  58                 var pos = jQuery.expr.match.POS.test( selector ) ?
  59                         jQuery( selector, context || this.context ) : null;
  60
  61                 return this.map(function(){
  62                         var cur = this, closer = 0;
  63                         while ( cur && cur.ownerDocument && cur !== context ) {
  64                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
  65                                         jQuery.lastCloser = closer;
  66                                         return cur;
  67                                 }
  68                                 cur = cur.parentNode;
  69                                 closer++;
  70                         }
  71                         jQuery.lastCloser = -1;
  72                         return null;
  73                 });
  74         },
  75
  76         add: function( selector, context ) {
  77                 var set = typeof selector === "string" ?
  78                                 jQuery( selector, context || this.context ) :
  79                                 jQuery.makeArray( selector ),
  80                         all = jQuery.merge( this.get(), set );
  81
  82                 return this.pushStack( set[0] && (set[0].setInterval || set[0].nodeType === 9 || (set[0].parentNode && set[0].parentNode.nodeType !== 11)) ?
  83                         jQuery.unique( all ) :
  84                         all );
  85         },
  86
  87         eq: function( i ) {
  88                 return i === -1 ?
  89                         this.slice( i ) :
  90                         this.slice( i, +i + 1 );
  91         },
  92
  93         first: function() {
  94                 return this.eq( 0 );
  95         },
  96
  97         last: function() {
  98                 return this.eq( -1 );
  99         },
 100
 101         slice: function() {
 102                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 103                         "slice", Array.prototype.slice.call(arguments).join(",") );
 104         },
 105
 106         map: function( callback ) {
 107                 return this.pushStack( jQuery.map(this, function(elem, i){
 108                         return callback.call( elem, i, elem );
 109                 }));
 110         },
 111
 112         andSelf: function() {
 113                 return this.add( this.prevObject );
 114         },
 115
 116         end: function() {
 117                 return this.prevObject || jQuery(null);
 118         }
 119 });
 120
 121 jQuery.each({
 122         parent: function(elem){return elem.parentNode;},
 123         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 124         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 125         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 126         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 127         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 128         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 129         children: function(elem){return jQuery.sibling(elem.firstChild);},
 130         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 131 }, function(name, fn){
 132         jQuery.fn[ name ] = function( selector ) {
 133                 var ret = jQuery.map( this, fn );
 134
 135                 if ( selector && typeof selector === "string" ) {
 136                         ret = jQuery.filter( selector, ret );
 137                 }
 138
 139                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 140
 141                 if ( name === "parents" && this.length > 1 ) {
 142                         ret = ret.reverse();
 143                 }
 144
 145                 return this.pushStack( ret, name, selector );
 146         };
 147 });
 148
 149 jQuery.extend({
 150         filter: function( expr, elems, not ) {
 151                 if ( not ) {
 152                         expr = ":not(" + expr + ")";
 153                 }
 154
 155                 return jQuery.find.matches(expr, elems);
 156         },
 157
 158         dir: function( elem, dir ) {
 159                 var matched = [], cur = elem[dir];
 160                 while ( cur && cur.nodeType !== 9 ) {
 161                         if ( cur.nodeType === 1 ) {
 162                                 matched.push( cur );
 163                         }
 164                         cur = cur[dir];
 165                 }
 166                 return matched;
 167         },
 168
 169         nth: function( cur, result, dir, elem ) {
 170                 result = result || 1;
 171                 var num = 0;
 172
 173                 for ( ; cur; cur = cur[dir] ) {
 174                         if ( cur.nodeType === 1 && ++num === result ) {
 175                                 break;
 176                         }
 177                 }
 178
 179                 return cur;
 180         },
 181
 182         sibling: function( n, elem ) {
 183                 var r = [];
 184
 185                 for ( ; n; n = n.nextSibling ) {
 186                         if ( n.nodeType === 1 && n !== elem ) {
 187                                 r.push( n );
 188                         }
 189                 }
 190
 191                 return r;
 192         }
 193 });