jquery/src/traversing.js

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var runtil = /Until$/,
rparentsprev = /^(?:parents|prevUntil|prevAll)/,
// Note: This RegExp should be improved, or likely pulled from Sizzle
rmultiselector = /,/,
slice = Array.prototype.slice;
// Implement the identical functionality for filter and not
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var winnow = function( elements, qualifier, keep ) {
if ( jQuery.isFunction( qualifier ) ) {
return jQuery.grep(elements, function(elem, i) {
return !!qualifier.call( elem, i ) === keep;
});
} else if ( qualifier.nodeType ) {
return jQuery.grep(elements, function(elem, i) {
return (elem === qualifier) === keep;
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});
} else if ( typeof qualifier === "string" ) {
var filtered = jQuery.grep(elements, function(elem) {
return elem.nodeType === 1;
});
if ( isSimple.test( qualifier ) ) {
return jQuery.filter(qualifier, filtered, !keep);
} else {
qualifier = jQuery.filter( qualifier, elements );
}
}
return jQuery.grep(elements, function(elem, i) {
return (jQuery.inArray( elem, qualifier ) >= 0) === keep;
});
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};
jQuery.fn.extend({
find: function( selector ) {
var ret = this.pushStack( "", "find", selector ), length = 0;
for ( var i = 0, l = this.length; i < l; i++ ) {
length = ret.length;
jQuery.find( selector, this[i], ret );
if ( i > 0 ) {
// Make sure that the results are unique
for ( var n = length; n < ret.length; n++ ) {
for ( var r = 0; r < length; r++ ) {
if ( ret[r] === ret[n] ) {
ret.splice(n--, 1);
break;
}
}
}
}
}
return ret;
},
has: function( target ) {
var targets = jQuery( target );
return this.filter(function() {
for ( var i = 0, l = targets.length; i < l; i++ ) {
if ( jQuery.contains( this, targets[i] ) ) {
return true;
}
}
});
},
contains: function( target ) {
return this.has( target ).length > 0;
},
not: function( selector ) {
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return this.pushStack( winnow(this, selector, false), "not", selector);
},
filter: function( selector ) {
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return this.pushStack( winnow(this, selector, true), "filter", selector );
},
closest: function( selectors, context ) {
if ( jQuery.isArray( selectors ) ) {
var ret = [], cur = this[0], match, matches = {}, selector;
if ( cur && selectors.length ) {
for ( var i = 0, l = selectors.length; i < l; i++ ) {
selector = selectors[i];
if ( !matches[selector] ) {
matches[selector] = jQuery.expr.match.POS.test( selector ) ?
jQuery( selector, context || this.context ) :
selector;
}
}
while ( cur && cur.ownerDocument && cur !== context ) {
for ( selector in matches ) {
match = matches[selector];
if ( match.jquery ? match.index(cur) > -1 : jQuery(cur).is(match) ) {
ret.push({ selector: selector, elem: cur });
delete matches[selector];
}
}
cur = cur.parentNode;
}
}
return ret;
}
var pos = jQuery.expr.match.POS.test( selectors ) ?
jQuery( selectors, context || this.context ) : null;
return this.map(function(i, cur){
while ( cur && cur.ownerDocument && cur !== context ) {
if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selectors) ) {
return cur;
}
cur = cur.parentNode;
}
return null;
});
},
add: function( selector, context ) {
var set = typeof selector === "string" ?
jQuery( selector, context || this.context ) :
jQuery.makeArray( selector ),
all = jQuery.merge( this.get(), set );
return this.pushStack( set[0] && (set[0].setInterval || set[0].nodeType === 9 || (set[0].parentNode && set[0].parentNode.nodeType !== 11)) ?
jQuery.unique( all ) :
all );
},
eq: function( i ) {
return i === -1 ?
this.slice( i ) :
this.slice( i, +i + 1 );
},
first: function() {
return this.eq( 0 );
},
last: function() {
return this.eq( -1 );
},
slice: function() {
return this.pushStack( slice.apply( this, arguments ),
"slice", slice.call(arguments).join(",") );
},
map: function( callback ) {
return this.pushStack( jQuery.map(this, function(elem, i){
return callback.call( elem, i, elem );
}));
},
andSelf: function() {
return this.add( this.prevObject );
},
end: function() {
return this.prevObject || jQuery(null);
}
});
jQuery.each({
parent: function(elem){return elem.parentNode;},
parents: function(elem){return jQuery.dir(elem,"parentNode");},
parentsUntil: function(elem,i,until){return jQuery.dir(elem,"parentNode",until);},
next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
nextUntil: function(elem,i,until){return jQuery.dir(elem,"nextSibling",until);},
prevUntil: function(elem,i,until){return jQuery.dir(elem,"previousSibling",until);},
siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
children: function(elem){return jQuery.sibling(elem.firstChild);},
contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
}, function(name, fn){
jQuery.fn[ name ] = function( until, selector ) {
var ret = jQuery.map( this, fn, until );
if ( !runtil.test( name ) ) {
selector = until;
}
if ( selector && typeof selector === "string" ) {
ret = jQuery.filter( selector, ret );
}
ret = this.length > 1 ? jQuery.unique( ret ) : ret;
if ( (this.length > 1 || rmultiselector.test( selector )) && rparentsprev.test( name ) ) {
ret = ret.reverse();
}
return this.pushStack( ret, name, slice.call(arguments).join(",") );
};
});
jQuery.extend({
filter: function( expr, elems, not ) {
if ( not ) {
expr = ":not(" + expr + ")";
}
return jQuery.find.matches(expr, elems);
},
dir: function( elem, dir, until ) {
var matched = [], cur = elem[dir];
while ( cur && cur.nodeType !== 9 && (until === undefined || !jQuery( cur ).is( until )) ) {
if ( cur.nodeType === 1 ) {
matched.push( cur );
}
cur = cur[dir];
}
return matched;
},
nth: function( cur, result, dir, elem ) {
result = result || 1;
var num = 0;
for ( ; cur; cur = cur[dir] ) {
if ( cur.nodeType === 1 && ++num === result ) {
break;
}
}
return cur;
},
sibling: function( n, elem ) {
var r = [];
for ( ; n; n = n.nextSibling ) {
if ( n.nodeType === 1 && n !== elem ) {
r.push( n );
}
}
return r;
}
});