/**

 * Handles toggling the navigation menu for small screens and

 * accessibility for submenu items.

 */

( function() {

	var nav = document.getElementById( 'site-navigation' ), button, menu;

	if ( ! nav ) {

		return;

	}

	button = nav.getElementsByTagName( 'button' )[0];

	menu   = nav.getElementsByTagName( 'ul' )[0];

	if ( ! button ) {

		return;

	}

	// Hide button if menu is missing or empty.

	if ( ! menu || ! menu.childNodes.length ) {

		button.style.display = 'none';

		return;

	}

	button.onclick = function() {

		if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {

			menu.className = 'nav-menu';

		}

		if ( -1 !== button.className.indexOf( 'toggled-on' ) ) {

			button.className = button.className.replace( ' toggled-on', '' );

			menu.className = menu.className.replace( ' toggled-on', '' );

		} else {

			button.className += ' toggled-on';

			menu.className += ' toggled-on';

		}

	};

} )();

// Better focus for hidden submenu items for accessibility.

( function( $ ) {

	$( '.main-navigation' ).find( 'a' ).on( 'focus.twentytwelve blur.twentytwelve', function() {

		$( this ).parents( '.menu-item, .page_item' ).toggleClass( 'focus' );

	} );

  if ( 'ontouchstart' in window ) {

    $('body').on( 'touchstart.twentytwelve',  '.menu-item-has-children > a, .page_item_has_children > a', function( e ) {

      var el = $( this ).parent( 'li' );

      if ( ! el.hasClass( 'focus' ) ) {

        e.preventDefault();

        el.toggleClass( 'focus' );

        el.siblings( '.focus').removeClass( 'focus' );

      }

    } );

  }

} )( jQuery );