1 /* global twentyseventeenScreenReaderText */

     2 /**

     3  * Theme functions file.

     4  *

     5  * Contains handlers for navigation and widget area.

     6  */

     7 

     8 (function( $ ) {

     9 	var masthead, menuToggle, siteNavContain, siteNavigation;

    10 

    11 	function initMainNavigation( container ) {

    12 

    13 		// Add dropdown toggle that displays child menu items.

    14 		var dropdownToggle = $( '<button />', { 'class': 'dropdown-toggle', 'aria-expanded': false })

    15 			.append( twentyseventeenScreenReaderText.icon )

    16 			.append( $( '<span />', { 'class': 'screen-reader-text', text: twentyseventeenScreenReaderText.expand }) );

    17 

    18 		container.find( '.menu-item-has-children > a, .page_item_has_children > a' ).after( dropdownToggle );

    19 

    20 		// Set the active submenu dropdown toggle button initial state.

    21 		container.find( '.current-menu-ancestor > button' )

    22 			.addClass( 'toggled-on' )

    23 			.attr( 'aria-expanded', 'true' )

    24 			.find( '.screen-reader-text' )

    25 			.text( twentyseventeenScreenReaderText.collapse );

    26 		// Set the active submenu initial state.

    27 		container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );

    28 

    29 		container.find( '.dropdown-toggle' ).click( function( e ) {

    30 			var _this = $( this ),

    31 				screenReaderSpan = _this.find( '.screen-reader-text' );

    32 

    33 			e.preventDefault();

    34 			_this.toggleClass( 'toggled-on' );

    35 			_this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );

    36 

    37 			_this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );

    38 

    39 			screenReaderSpan.text( screenReaderSpan.text() === twentyseventeenScreenReaderText.expand ? twentyseventeenScreenReaderText.collapse : twentyseventeenScreenReaderText.expand );

    40 		});

    41 	}

    42 

    43 	initMainNavigation( $( '.main-navigation' ) );

    44 

    45 	masthead       = $( '#masthead' );

    46 	menuToggle     = masthead.find( '.menu-toggle' );

    47 	siteNavContain = masthead.find( '.main-navigation' );

    48 	siteNavigation = masthead.find( '.main-navigation > div > ul' );

    49 

    50 	// Enable menuToggle.

    51 	(function() {

    52 

    53 		// Return early if menuToggle is missing.

    54 		if ( ! menuToggle.length ) {

    55 			return;

    56 		}

    57 

    58 		// Add an initial value for the attribute.

    59 		menuToggle.attr( 'aria-expanded', 'false' );

    60 

    61 		menuToggle.on( 'click.twentyseventeen', function() {

    62 			siteNavContain.toggleClass( 'toggled-on' );

    63 

    64 			$( this ).attr( 'aria-expanded', siteNavContain.hasClass( 'toggled-on' ) );

    65 		});

    66 	})();

    67 

    68 	// Fix sub-menus for touch devices and better focus for hidden submenu items for accessibility.

    69 	(function() {

    70 		if ( ! siteNavigation.length || ! siteNavigation.children().length ) {

    71 			return;

    72 		}

    73 

    74 		// Toggle `focus` class to allow submenu access on tablets.

    75 		function toggleFocusClassTouchScreen() {

    76 			if ( 'none' === $( '.menu-toggle' ).css( 'display' ) ) {

    77 

    78 				$( document.body ).on( 'touchstart.twentyseventeen', function( e ) {

    79 					if ( ! $( e.target ).closest( '.main-navigation li' ).length ) {

    80 						$( '.main-navigation li' ).removeClass( 'focus' );

    81 					}

    82 				});

    83 

    84 				siteNavigation.find( '.menu-item-has-children > a, .page_item_has_children > a' )

    85 					.on( 'touchstart.twentyseventeen', function( e ) {

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

    87 

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

    89 							e.preventDefault();

    90 							el.toggleClass( 'focus' );

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

    92 						}

    93 					});

    94 

    95 			} else {

    96 				siteNavigation.find( '.menu-item-has-children > a, .page_item_has_children > a' ).unbind( 'touchstart.twentyseventeen' );

    97 			}

    98 		}

    99 

   100 		if ( 'ontouchstart' in window ) {

   101 			$( window ).on( 'resize.twentyseventeen', toggleFocusClassTouchScreen );

   102 			toggleFocusClassTouchScreen();

   103 		}

   104 

   105 		siteNavigation.find( 'a' ).on( 'focus.twentyseventeen blur.twentyseventeen', function() {

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

   107 		});

   108 	})();

   109 })( jQuery );