define([

"./core",
"./var/indexOf",
"./traversing/var/rneedsContext",
"./core/init",
"./traversing/findFilter",
"./selector"

], function( jQuery, indexOf, rneedsContext ) {

var rparentsprev = /^(?:parents|prev(?:Until|All))/,

// Methods guaranteed to produce a unique set when starting from a unique set
guaranteedUnique = {
        children: true,
        contents: true,
        next: true,
        prev: true
};

jQuery.extend({

dir: function( elem, dir, until ) {
        var matched = [],
                truncate = until !== undefined;

        while ( (elem = elem[ dir ]) && elem.nodeType !== 9 ) {
                if ( elem.nodeType === 1 ) {
                        if ( truncate && jQuery( elem ).is( until ) ) {
                                break;
                        }
                        matched.push( elem );
                }
        }
        return matched;
},

sibling: function( n, elem ) {
        var matched = [];

        for ( ; n; n = n.nextSibling ) {
                if ( n.nodeType === 1 && n !== elem ) {
                        matched.push( n );
                }
        }

        return matched;
}

});

jQuery.fn.extend({

has: function( target ) {
        var targets = jQuery( target, this ),
                l = targets.length;

        return this.filter(function() {
                var i = 0;
                for ( ; i < l; i++ ) {
                        if ( jQuery.contains( this, targets[i] ) ) {
                                return true;
                        }
                }
        });
},

closest: function( selectors, context ) {
        var cur,
                i = 0,
                l = this.length,
                matched = [],
                pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
                        jQuery( selectors, context || this.context ) :
                        0;

        for ( ; i < l; i++ ) {
                for ( cur = this[i]; cur && cur !== context; cur = cur.parentNode ) {
                        // Always skip document fragments
                        if ( cur.nodeType < 11 && (pos ?
                                pos.index(cur) > -1 :

                                // Don't pass non-elements to Sizzle
                                cur.nodeType === 1 &&
                                        jQuery.find.matchesSelector(cur, selectors)) ) {

                                matched.push( cur );
                                break;
                        }
                }
        }

        return this.pushStack( matched.length > 1 ? jQuery.unique( matched ) : matched );
},

// Determine the position of an element within the set
index: function( elem ) {

        // No argument, return index in parent
        if ( !elem ) {
                return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
        }

        // Index in selector
        if ( typeof elem === "string" ) {
                return indexOf.call( jQuery( elem ), this[ 0 ] );
        }

        // Locate the position of the desired element
        return indexOf.call( this,

                // If it receives a jQuery object, the first element is used
                elem.jquery ? elem[ 0 ] : elem
        );
},

add: function( selector, context ) {
        return this.pushStack(
                jQuery.unique(
                        jQuery.merge( this.get(), jQuery( selector, context ) )
                )
        );
},

addBack: function( selector ) {
        return this.add( selector == null ?
                this.prevObject : this.prevObject.filter(selector)
        );
}

});

function sibling( cur, dir ) {

while ( (cur = cur[dir]) && cur.nodeType !== 1 ) {}
return cur;

}

jQuery.each({

parent: function( elem ) {
        var parent = elem.parentNode;
        return parent && parent.nodeType !== 11 ? parent : null;
},
parents: function( elem ) {
        return jQuery.dir( elem, "parentNode" );
},
parentsUntil: function( elem, i, until ) {
        return jQuery.dir( elem, "parentNode", until );
},
next: function( elem ) {
        return sibling( elem, "nextSibling" );
},
prev: function( elem ) {
        return sibling( elem, "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 elem.contentDocument || jQuery.merge( [], elem.childNodes );
}

}, function( name, fn ) {

jQuery.fn[ name ] = function( until, selector ) {
        var matched = jQuery.map( this, fn, until );

        if ( name.slice( -5 ) !== "Until" ) {
                selector = until;
        }

        if ( selector && typeof selector === "string" ) {
                matched = jQuery.filter( selector, matched );
        }

        if ( this.length > 1 ) {
                // Remove duplicates
                if ( !guaranteedUnique[ name ] ) {
                        jQuery.unique( matched );
                }

                // Reverse order for parents* and prev-derivatives
                if ( rparentsprev.test( name ) ) {
                        matched.reverse();
                }
        }

        return this.pushStack( matched );
};

});

return jQuery; });