src/traversing.js

   1 var runtil = /Until$/,
   2         rparentsprev = /^(?:parents|prevUntil|prevAll)/,
   3         // Note: This RegExp should be improved, or likely pulled from Sizzle
   4         rmultiselector = /,/,
   5         slice = Array.prototype.slice;
   6
   7 // Implement the identical functionality for filter and not
   8 var winnow = function( elements, qualifier, keep ) {
   9         if ( jQuery.isFunction( qualifier ) ) {
  10                 return jQuery.grep(elements, function(elem, i) {
  11                         return !!qualifier.call( elem, i ) === keep;
  12                 });
  13
  14         } else if ( qualifier.nodeType ) {
  15                 return jQuery.grep(elements, function(elem, i) {
  16                         return (elem === qualifier) === keep;
  17                 });
  18
  19         } else if ( typeof qualifier === "string" ) {
  20                 var filtered = jQuery.grep(elements, function(elem) {
  21                         return elem.nodeType === 1;
  22                 });
  23
  24                 if ( isSimple.test( qualifier ) ) {
  25                         return jQuery.filter(qualifier, filtered, !keep);
  26                 } else {
  27                         qualifier = jQuery.filter( qualifier, elements );
  28                 }
  29         }
  30
  31         return jQuery.grep(elements, function(elem, i) {
  32                 return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
  33         });
  34 };
  35
  36 jQuery.fn.extend({
  37         find: function( selector ) {
  38                 var ret = this.pushStack( "", "find", selector ), length = 0;
  39
  40                 for ( var i = 0, l = this.length; i < l; i++ ) {
  41                         length = ret.length;
  42                         jQuery.find( selector, this[i], ret );
  43
  44                         if ( i > 0 ) {
  45                                 // Make sure that the results are unique
  46                                 for ( var n = length; n < ret.length; n++ ) {
  47                                         for ( var r = 0; r < length; r++ ) {
  48                                                 if ( ret[r] === ret[n] ) {
  49                                                         ret.splice(n--, 1);
  50                                                         break;
  51                                                 }
  52                                         }
  53                                 }
  54                         }
  55                 }
  56
  57                 return ret;
  58         },
  59
  60         not: function( selector ) {
  61                 return this.pushStack( winnow(this, selector, false), "not", selector);
  62         },
  63
  64         filter: function( selector ) {
  65                 return this.pushStack( winnow(this, selector, true), "filter", selector );
  66         },
  67
  68         closest: function( selectors, context ) {
  69                 if ( jQuery.isArray( selectors ) ) {
  70                         var ret = [], cur = this[0], match, matches = {}, selector;
  71
  72                         if ( cur && selectors.length ) {
  73                                 for ( var i = 0, l = selectors.length; i < l; i++ ) {
  74                                         selector = selectors[i];
  75
  76                                         if ( !matches[selector] ) {
  77                                                 matches[selector] = jQuery.expr.match.POS.test( selector ) ?
  78                                                         jQuery( selector, context || this.context ) :
  79                                                         selector;
  80                                         }
  81                                 }
  82
  83                                 while ( cur && cur.ownerDocument && cur !== context ) {
  84                                         for ( selector in matches ) {
  85                                                 match = matches[selector];
  86
  87                                                 if ( match.jquery ? match.index(cur) > -1 : jQuery(cur).is(match) ) {
  88                                                         ret.push({ selector: selector, elem: cur });
  89                                                         delete matches[selector];
  90                                                 }
  91                                         }
  92                                         cur = cur.parentNode;
  93                                 }
  94                         }
  95
  96                         return ret;
  97                 }
  98
  99                 var pos = jQuery.expr.match.POS.test( selectors ) ?
 100                         jQuery( selectors, context || this.context ) : null;
 101
 102                 return this.map(function(i, cur){
 103                         while ( cur && cur.ownerDocument && cur !== context ) {
 104                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selectors) ) {
 105                                         return cur;
 106                                 }
 107                                 cur = cur.parentNode;
 108                         }
 109                         return null;
 110                 });
 111         },
 112
 113         add: function( selector, context ) {
 114                 var set = typeof selector === "string" ?
 115                                 jQuery( selector, context || this.context ) :
 116                                 jQuery.makeArray( selector ),
 117                         all = jQuery.merge( this.get(), set );
 118
 119                 return this.pushStack( set[0] && (set[0].setInterval || set[0].nodeType === 9 || (set[0].parentNode && set[0].parentNode.nodeType !== 11)) ?
 120                         jQuery.unique( all ) :
 121                         all );
 122         },
 123
 124         eq: function( i ) {
 125                 return i === -1 ?
 126                         this.slice( i ) :
 127                         this.slice( i, +i + 1 );
 128         },
 129
 130         first: function() {
 131                 return this.eq( 0 );
 132         },
 133
 134         last: function() {
 135                 return this.eq( -1 );
 136         },
 137
 138         slice: function() {
 139                 return this.pushStack( slice.apply( this, arguments ),
 140                         "slice", slice.call(arguments).join(",") );
 141         },
 142
 143         map: function( callback ) {
 144                 return this.pushStack( jQuery.map(this, function(elem, i){
 145                         return callback.call( elem, i, elem );
 146                 }));
 147         },
 148
 149         andSelf: function() {
 150                 return this.add( this.prevObject );
 151         },
 152
 153         end: function() {
 154                 return this.prevObject || jQuery(null);
 155         }
 156 });
 157
 158 jQuery.each({
 159         parent: function(elem){return elem.parentNode;},
 160         parents: function(elem){return jQuery.dir(elem,"parentNode");},
 161         parentsUntil: function(elem,i,until){return jQuery.dir(elem,"parentNode",until);},
 162         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
 163         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
 164         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
 165         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
 166         nextUntil: function(elem,i,until){return jQuery.dir(elem,"nextSibling",until);},
 167         prevUntil: function(elem,i,until){return jQuery.dir(elem,"previousSibling",until);},
 168         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
 169         children: function(elem){return jQuery.sibling(elem.firstChild);},
 170         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
 171 }, function(name, fn){
 172         jQuery.fn[ name ] = function( until, selector ) {
 173                 var ret = jQuery.map( this, fn, until );
 174
 175                 if ( !runtil.test( name ) ) {
 176                         selector = until;
 177                 }
 178
 179                 if ( selector && typeof selector === "string" ) {
 180                         ret = jQuery.filter( selector, ret );
 181                 }
 182
 183                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 184
 185                 if ( (this.length > 1 || rmultiselector.test( selector )) && rparentsprev.test( name ) ) {
 186                         ret = ret.reverse();
 187                 }
 188
 189                 return this.pushStack( ret, name, slice.call(arguments).join(",") );
 190         };
 191 });
 192
 193 jQuery.extend({
 194         filter: function( expr, elems, not ) {
 195                 if ( not ) {
 196                         expr = ":not(" + expr + ")";
 197                 }
 198
 199                 return jQuery.find.matches(expr, elems);
 200         },
 201
 202         dir: function( elem, dir, until ) {
 203                 var matched = [], cur = elem[dir];
 204                 while ( cur && cur.nodeType !== 9 && (until === undefined || !jQuery( cur ).is( until )) ) {
 205                         if ( cur.nodeType === 1 ) {
 206                                 matched.push( cur );
 207                         }
 208                         cur = cur[dir];
 209                 }
 210                 return matched;
 211         },
 212
 213         nth: function( cur, result, dir, elem ) {
 214                 result = result || 1;
 215                 var num = 0;
 216
 217                 for ( ; cur; cur = cur[dir] ) {
 218                         if ( cur.nodeType === 1 && ++num === result ) {
 219                                 break;
 220                         }
 221                 }
 222
 223                 return cur;
 224         },
 225
 226         sibling: function( n, elem ) {
 227                 var r = [];
 228
 229                 for ( ; n; n = n.nextSibling ) {
 230                         if ( n.nodeType === 1 && n !== elem ) {
 231                                 r.push( n );
 232                         }
 233                 }
 234
 235                 return r;
 236         }
 237 });