define( [
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"../core",
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"../var/indexOf",
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"./var/rneedsContext",
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"../selector"
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], function( jQuery, indexOf, rneedsContext ) {
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var risSimple = /^.[^:#\[\.,]*$/;
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// Implement the identical functionality for filter and not
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function winnow( elements, qualifier, not ) {
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if ( jQuery.isFunction( qualifier ) ) {
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return jQuery.grep( elements, function( elem, i ) {
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/* jshint -W018 */
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return !!qualifier.call( elem, i, elem ) !== not;
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} );
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}
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if ( qualifier.nodeType ) {
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return jQuery.grep( elements, function( elem ) {
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return ( elem === qualifier ) !== not;
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} );
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}
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if ( typeof qualifier === "string" ) {
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if ( risSimple.test( qualifier ) ) {
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return jQuery.filter( qualifier, elements, not );
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}
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qualifier = jQuery.filter( qualifier, elements );
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}
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return jQuery.grep( elements, function( elem ) {
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return ( indexOf.call( qualifier, elem ) > -1 ) !== not;
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} );
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}
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jQuery.filter = function( expr, elems, not ) {
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var elem = elems[ 0 ];
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if ( not ) {
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expr = ":not(" + expr + ")";
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}
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return elems.length === 1 && elem.nodeType === 1 ?
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jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
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jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
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return elem.nodeType === 1;
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} ) );
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};
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jQuery.fn.extend( {
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find: function( selector ) {
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var i,
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len = this.length,
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ret = [],
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self = this;
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if ( typeof selector !== "string" ) {
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return this.pushStack( jQuery( selector ).filter( function() {
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for ( i = 0; i < len; i++ ) {
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if ( jQuery.contains( self[ i ], this ) ) {
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return true;
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}
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}
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} ) );
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}
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for ( i = 0; i < len; i++ ) {
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jQuery.find( selector, self[ i ], ret );
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}
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// Needed because $( selector, context ) becomes $( context ).find( selector )
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ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
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ret.selector = this.selector ? this.selector + " " + selector : selector;
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return ret;
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},
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filter: function( selector ) {
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return this.pushStack( winnow( this, selector || [], false ) );
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},
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not: function( selector ) {
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return this.pushStack( winnow( this, selector || [], true ) );
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},
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is: function( selector ) {
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return !!winnow(
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this,
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// If this is a positional/relative selector, check membership in the returned set
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// so $("p:first").is("p:last") won't return true for a doc with two "p".
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typeof selector === "string" && rneedsContext.test( selector ) ?
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jQuery( selector ) :
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selector || [],
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false
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).length;
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}
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} );
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} );
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