src/traversing.js

   1 (function( jQuery ) {
   2
   3 var runtil = /Until$/,
   4         rparentsprev = /^(?:parents|prevUntil|prevAll)/,
   5         // Note: This RegExp should be improved, or likely pulled from Sizzle
   6         rmultiselector = /,/,
   7         rchild = /^\s*>/,
   8         isSimple = /^.[^:#\[\.,]*$/,
   9         slice = Array.prototype.slice,
  10         POS = jQuery.expr.match.POS;
  11
  12 jQuery.fn.extend({
  13         find: function( selector ) {
  14                 // Handle "> div" child selectors and pass them to .children()
  15                 if ( typeof selector === "string" && rchild.test( selector ) ) {
  16                         return this.children( selector.replace( rchild, "" ) );
  17                 }
  18
  19                 var ret = this.pushStack( "", "find", selector ), length = 0;
  20
  21                 for ( var i = 0, l = this.length; i < l; i++ ) {
  22                         length = ret.length;
  23                         jQuery.find( selector, this[i], ret );
  24
  25                         if ( i > 0 ) {
  26                                 // Make sure that the results are unique
  27                                 for ( var n = length; n < ret.length; n++ ) {
  28                                         for ( var r = 0; r < length; r++ ) {
  29                                                 if ( ret[r] === ret[n] ) {
  30                                                         ret.splice(n--, 1);
  31                                                         break;
  32                                                 }
  33                                         }
  34                                 }
  35                         }
  36                 }
  37
  38                 return ret;
  39         },
  40
  41         has: function( target ) {
  42                 var targets = jQuery( target );
  43                 return this.filter(function() {
  44                         for ( var i = 0, l = targets.length; i < l; i++ ) {
  45                                 if ( jQuery.contains( this, targets[i] ) ) {
  46                                         return true;
  47                                 }
  48                         }
  49                 });
  50         },
  51
  52         not: function( selector ) {
  53                 return this.pushStack( winnow(this, selector, false), "not", selector);
  54         },
  55
  56         filter: function( selector ) {
  57                 return this.pushStack( winnow(this, selector, true), "filter", selector );
  58         },
  59
  60         is: function( selector ) {
  61                 return !!selector && jQuery.filter( selector, this ).length > 0;
  62         },
  63
  64         closest: function( selectors, context ) {
  65                 var ret;
  66
  67                 if ( jQuery.isArray( selectors ) ) {
  68                         var cur = this[0], match, matches = {}, selector, level = 1;
  69                         ret = [];
  70
  71                         if ( cur && selectors.length ) {
  72                                 for ( var i = 0, l = selectors.length; i < l; i++ ) {
  73                                         selector = selectors[i];
  74
  75                                         if ( !matches[selector] ) {
  76                                                 matches[selector] = jQuery.expr.match.POS.test( selector ) ?
  77                                                         jQuery( selector, context || this.context ) :
  78                                                         selector;
  79                                         }
  80                                 }
  81
  82                                 while ( cur && cur.ownerDocument && cur !== context ) {
  83                                         for ( selector in matches ) {
  84                                                 match = matches[selector];
  85
  86                                                 if ( match.jquery ? match.index(cur) > -1 : jQuery(cur).is(match) ) {
  87                                                         ret.push({ selector: selector, elem: cur, level: level });
  88                                                 }
  89                                         }
  90
  91                                         cur = cur.parentNode;
  92                                         level++;
  93                                 }
  94                         }
  95
  96                         return ret;
  97                 }
  98
  99                 var pos = POS.test( selectors ) ?
 100                         jQuery( selectors, context || this.context ) : null;
 101
 102                 ret = [];
 103
 104                 for ( var i = 0, j = this.length; i < j; i++ ) {
 105                         var cur = this[i];
 106
 107                         while ( cur ) {
 108                                 if ( pos ? pos.index(cur) > -1 : jQuery.find.matchesSelector(cur, selectors) ) {
 109                                         ret.push( cur );
 110                                         break;
 111
 112                                 } else {
 113                                         cur = cur.parentNode;
 114                                         if ( !cur.ownerDocument || cur === context ) {
 115                                                 break;
 116                                         }
 117                                 }
 118                         }
 119                 }
 120
 121                 ret = ret.length > 1 ? jQuery.unique(ret) : ret;
 122
 123                 return this.pushStack( ret, "closest", selectors );
 124         },
 125
 126         // Determine the position of an element within
 127         // the matched set of elements
 128         index: function( elem ) {
 129                 if ( !elem || typeof elem === "string" ) {
 130                         return jQuery.inArray( this[0],
 131                                 // If it receives a string, the selector is used
 132                                 // If it receives nothing, the siblings are used
 133                                 elem ? jQuery( elem ) : this.parent().children() );
 134                 }
 135                 // Locate the position of the desired element
 136                 return jQuery.inArray(
 137                         // If it receives a jQuery object, the first element is used
 138                         elem.jquery ? elem[0] : elem, this );
 139         },
 140
 141         add: function( selector, context ) {
 142                 var set = typeof selector === "string" ?
 143                                 jQuery( selector, context || this.context ) :
 144                                 jQuery.makeArray( selector ),
 145                         all = jQuery.merge( this.get(), set );
 146
 147                 return this.pushStack( isDisconnected( set[0] ) || isDisconnected( all[0] ) ?
 148                         all :
 149                         jQuery.unique( all ) );
 150         },
 151
 152         andSelf: function() {
 153                 return this.add( this.prevObject );
 154         }
 155 });
 156
 157 // A painfully simple check to see if an element is disconnected
 158 // from a document (should be improved, where feasible).
 159 function isDisconnected( node ) {
 160         return !node || !node.parentNode || node.parentNode.nodeType === 11;
 161 }
 162
 163 jQuery.each({
 164         parent: function( elem ) {
 165                 var parent = elem.parentNode;
 166                 return parent && parent.nodeType !== 11 ? parent : null;
 167         },
 168         parents: function( elem ) {
 169                 return jQuery.dir( elem, "parentNode" );
 170         },
 171         parentsUntil: function( elem, i, until ) {
 172                 return jQuery.dir( elem, "parentNode", until );
 173         },
 174         next: function( elem ) {
 175                 return jQuery.nth( elem, 2, "nextSibling" );
 176         },
 177         prev: function( elem ) {
 178                 return jQuery.nth( elem, 2, "previousSibling" );
 179         },
 180         nextAll: function( elem ) {
 181                 return jQuery.dir( elem, "nextSibling" );
 182         },
 183         prevAll: function( elem ) {
 184                 return jQuery.dir( elem, "previousSibling" );
 185         },
 186         nextUntil: function( elem, i, until ) {
 187                 return jQuery.dir( elem, "nextSibling", until );
 188         },
 189         prevUntil: function( elem, i, until ) {
 190                 return jQuery.dir( elem, "previousSibling", until );
 191         },
 192         siblings: function( elem ) {
 193                 return jQuery.sibling( elem.parentNode.firstChild, elem );
 194         },
 195         children: function( elem ) {
 196                 return jQuery.sibling( elem.firstChild );
 197         },
 198         contents: function( elem ) {
 199                 return jQuery.nodeName( elem, "iframe" ) ?
 200                         elem.contentDocument || elem.contentWindow.document :
 201                         jQuery.makeArray( elem.childNodes );
 202         }
 203 }, function( name, fn ) {
 204         jQuery.fn[ name ] = function( until, selector ) {
 205                 var ret = jQuery.map( this, fn, until );
 206
 207                 if ( !runtil.test( name ) ) {
 208                         selector = until;
 209                 }
 210
 211                 if ( selector && typeof selector === "string" ) {
 212                         ret = jQuery.filter( selector, ret );
 213                 }
 214
 215                 ret = this.length > 1 ? jQuery.unique( ret ) : ret;
 216
 217                 if ( (this.length > 1 || rmultiselector.test( selector )) && rparentsprev.test( name ) ) {
 218                         ret = ret.reverse();
 219                 }
 220
 221                 return this.pushStack( ret, name, slice.call(arguments).join(",") );
 222         };
 223 });
 224
 225 jQuery.extend({
 226         filter: function( expr, elems, not ) {
 227                 if ( not ) {
 228                         expr = ":not(" + expr + ")";
 229                 }
 230
 231                 return elems.length === 1 ?
 232                         jQuery.find.matchesSelector(elems[0], expr) ? [ elems[0] ] : [] :
 233                         jQuery.find.matches(expr, elems);
 234         },
 235
 236         dir: function( elem, dir, until ) {
 237                 var matched = [], cur = elem[dir];
 238                 while ( cur && cur.nodeType !== 9 && (until === undefined || cur.nodeType !== 1 || !jQuery( cur ).is( until )) ) {
 239                         if ( cur.nodeType === 1 ) {
 240                                 matched.push( cur );
 241                         }
 242                         cur = cur[dir];
 243                 }
 244                 return matched;
 245         },
 246
 247         nth: function( cur, result, dir, elem ) {
 248                 result = result || 1;
 249                 var num = 0;
 250
 251                 for ( ; cur; cur = cur[dir] ) {
 252                         if ( cur.nodeType === 1 && ++num === result ) {
 253                                 break;
 254                         }
 255                 }
 256
 257                 return cur;
 258         },
 259
 260         sibling: function( n, elem ) {
 261                 var r = [];
 262
 263                 for ( ; n; n = n.nextSibling ) {
 264                         if ( n.nodeType === 1 && n !== elem ) {
 265                                 r.push( n );
 266                         }
 267                 }
 268
 269                 return r;
 270         }
 271 });
 272
 273 // Implement the identical functionality for filter and not
 274 function winnow( elements, qualifier, keep ) {
 275         if ( jQuery.isFunction( qualifier ) ) {
 276                 return jQuery.grep(elements, function( elem, i ) {
 277                         var retVal = !!qualifier.call( elem, i, elem );
 278                         return retVal === keep;
 279                 });
 280
 281         } else if ( qualifier.nodeType ) {
 282                 return jQuery.grep(elements, function( elem, i ) {
 283                         return (elem === qualifier) === keep;
 284                 });
 285
 286         } else if ( typeof qualifier === "string" ) {
 287                 var filtered = jQuery.grep(elements, function( elem ) {
 288                         return elem.nodeType === 1;
 289                 });
 290
 291                 if ( isSimple.test( qualifier ) ) {
 292                         return jQuery.filter(qualifier, filtered, !keep);
 293                 } else {
 294                         qualifier = jQuery.filter( qualifier, filtered );
 295                 }
 296         }
 297
 298         return jQuery.grep(elements, function( elem, i ) {
 299                 return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
 300         });
 301 }
 302
 303 })( jQuery );