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( selectors, context ) {
  58                 if ( jQuery.isArray( selectors ) ) {
  59                         var ret = [], cur = this[0], match, matches = {}, selector;
  60
  61                         if ( cur && selectors.length ) {
  62                                 for ( var i = 0, l = selectors.length; i < l; i++ ) {
  63                                         selector = selectors[i];
  64
  65                                         if ( !matches[selector] ) {
  66                                                 matches[selector] = jQuery.expr.match.POS.test( selector ) ?
  67                                                         jQuery( selector, context || this.context ) :
  68                                                         selector;
  69                                         }
  70                                 }
  71
  72                                 while ( cur && cur.ownerDocument && cur !== context ) {
  73                                         for ( selector in matches ) {
  74                                                 match = matches[selector];
  75
  76                                                 if ( match.jquery ? match.index(cur) > -1 : jQuery(cur).is(match) ) {
  77                                                         ret.push({ selector: selector, elem: cur });
  78                                                         delete matches[selector];
  79                                                 }
  80                                         }
  81                                         cur = cur.parentNode;
  82                                 }
  83                         }
  84
  85                         return ret;
  86                 }
  87
  88                 var pos = jQuery.expr.match.POS.test( selectors ) ?
  89                         jQuery( selectors, context || this.context ) : null;
  90
  91                 return this.map(function(i, cur){
  92                         while ( cur && cur.ownerDocument && cur !== context ) {
  93                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selectors) ) {
  94                                         return cur;
  95                                 }
  96                                 cur = cur.parentNode;
  97                         }
  98                         return null;
  99                 });
 100         },
 101
 102         add: function( selector, context ) {
 103                 var set = typeof selector === "string" ?
 104                                 jQuery( selector, context || this.context ) :
 105                                 jQuery.makeArray( selector ),
 106                         all = jQuery.merge( this.get(), set );
 107
 108                 return this.pushStack( set[0] && (set[0].setInterval || set[0].nodeType === 9 || (set[0].parentNode && set[0].parentNode.nodeType !== 11)) ?
 109                         jQuery.unique( all ) :
 110                         all );
 111         },
 112
 113         eq: function( i ) {
 114                 return i === -1 ?
 115                         this.slice( i ) :
 116                         this.slice( i, +i + 1 );
 117         },
 118
 119         first: function() {
 120                 return this.eq( 0 );
 121         },
 122
 123         last: function() {
 124                 return this.eq( -1 );
 125         },
 126
 127         slice: function() {
 128                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 129                         "slice", Array.prototype.slice.call(arguments).join(",") );
 130         },
 131
 132         map: function( callback ) {
 133                 return this.pushStack( jQuery.map(this, function(elem, i){
 134                         return callback.call( elem, i, elem );
 135                 }));
 136         },
 137
 138         andSelf: function() {
 139                 return this.add( this.prevObject );
 140         },
 141
 142         end: function() {
 143                 return this.prevObject || jQuery(null);
 144         }
 145 });
 146
 147 jQuery.each({
 148         parent: function(elem){return elem.parentNode;},
 149         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 150         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 151         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 152         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 153         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 154         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 155         children: function(elem){return jQuery.sibling(elem.firstChild);},
 156         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 157 }, function(name, fn){
 158         jQuery.fn[ name ] = function( selector ) {
 159                 var ret = jQuery.map( this, fn );
 160
 161                 if ( selector && typeof selector === "string" ) {
 162                         ret = jQuery.filter( selector, ret );
 163                 }
 164
 165                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 166
 167                 if ( name === "parents" && this.length > 1 ) {
 168                         ret = ret.reverse();
 169                 }
 170
 171                 return this.pushStack( ret, name, selector );
 172         };
 173 });
 174
 175 jQuery.extend({
 176         filter: function( expr, elems, not ) {
 177                 if ( not ) {
 178                         expr = ":not(" + expr + ")";
 179                 }
 180
 181                 return jQuery.find.matches(expr, elems);
 182         },
 183
 184         dir: function( elem, dir ) {
 185                 var matched = [], cur = elem[dir];
 186                 while ( cur && cur.nodeType !== 9 ) {
 187                         if ( cur.nodeType === 1 ) {
 188                                 matched.push( cur );
 189                         }
 190                         cur = cur[dir];
 191                 }
 192                 return matched;
 193         },
 194
 195         nth: function( cur, result, dir, elem ) {
 196                 result = result || 1;
 197                 var num = 0;
 198
 199                 for ( ; cur; cur = cur[dir] ) {
 200                         if ( cur.nodeType === 1 && ++num === result ) {
 201                                 break;
 202                         }
 203                 }
 204
 205                 return cur;
 206         },
 207
 208         sibling: function( n, elem ) {
 209                 var r = [];
 210
 211                 for ( ; n; n = n.nextSibling ) {
 212                         if ( n.nodeType === 1 && n !== elem ) {
 213                                 r.push( n );
 214                         }
 215                 }
 216
 217                 return r;
 218         }
 219 });