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