--- /dev/null
+/* global screenReaderText */
+/**
+ * Theme functions file.
+ *
+ * Contains handlers for navigation and widget area.
+ */
+
+( function( $ ) {
+ var body, masthead, menuToggle, siteNavigation, socialNavigation, siteHeaderMenu, resizeTimer;
+
+ function initMainNavigation( container ) {
+
+ // Add dropdown toggle that displays child menu items.
+ var dropdownToggle = $( '<button />', {
+ 'class': 'dropdown-toggle',
+ 'aria-expanded': false
+ } ).append( $( '<span />', {
+ 'class': 'screen-reader-text',
+ text: screenReaderText.expand
+ } ) );
+
+ container.find( '.menu-item-has-children > a' ).after( dropdownToggle );
+
+ // Toggle buttons and submenu items with active children menu items.
+ container.find( '.current-menu-ancestor > button' ).addClass( 'toggled-on' );
+ container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );
+
+ // Add menu items with submenus to aria-haspopup="true".
+ container.find( '.menu-item-has-children' ).attr( 'aria-haspopup', 'true' );
+
+ container.find( '.dropdown-toggle' ).click( function( e ) {
+ var _this = $( this ),
+ screenReaderSpan = _this.find( '.screen-reader-text' );
+
+ e.preventDefault();
+ _this.toggleClass( 'toggled-on' );
+ _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
+
+ // jscs:disable
+ _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
+ // jscs:enable
+ screenReaderSpan.text( screenReaderSpan.text() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
+ } );
+ }
+ initMainNavigation( $( '.main-navigation' ) );
+
+ masthead = $( '#masthead' );
+ menuToggle = masthead.find( '#menu-toggle' );
+ siteHeaderMenu = masthead.find( '#site-header-menu' );
+ siteNavigation = masthead.find( '#site-navigation' );
+ socialNavigation = masthead.find( '#social-navigation' );
+
+ // Enable menuToggle.
+ ( function() {
+
+ // Return early if menuToggle is missing.
+ if ( ! menuToggle.length ) {
+ return;
+ }
+
+ // Add an initial values for the attribute.
+ menuToggle.add( siteNavigation ).add( socialNavigation ).attr( 'aria-expanded', 'false' );
+
+ menuToggle.on( 'click.twentysixteen', function() {
+ $( this ).add( siteHeaderMenu ).toggleClass( 'toggled-on' );
+
+ // jscs:disable
+ $( this ).add( siteNavigation ).add( socialNavigation ).attr( 'aria-expanded', $( this ).add( siteNavigation ).add( socialNavigation ).attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
+ // jscs:enable
+ } );
+ } )();
+
+ // Fix sub-menus for touch devices and better focus for hidden submenu items for accessibility.
+ ( function() {
+ if ( ! siteNavigation.length || ! siteNavigation.children().length ) {
+ return;
+ }
+
+ // Toggle `focus` class to allow submenu access on tablets.
+ function toggleFocusClassTouchScreen() {
+ if ( window.innerWidth >= 910 ) {
+ $( document.body ).on( 'touchstart.twentysixteen', function( e ) {
+ if ( ! $( e.target ).closest( '.main-navigation li' ).length ) {
+ $( '.main-navigation li' ).removeClass( 'focus' );
+ }
+ } );
+ siteNavigation.find( '.menu-item-has-children > a' ).on( 'touchstart.twentysixteen', function( e ) {
+ var el = $( this ).parent( 'li' );
+
+ if ( ! el.hasClass( 'focus' ) ) {
+ e.preventDefault();
+ el.toggleClass( 'focus' );
+ el.siblings( '.focus' ).removeClass( 'focus' );
+ }
+ } );
+ } else {
+ siteNavigation.find( '.menu-item-has-children > a' ).unbind( 'touchstart.twentysixteen' );
+ }
+ }
+
+ if ( 'ontouchstart' in window ) {
+ $( window ).on( 'resize.twentysixteen', toggleFocusClassTouchScreen );
+ toggleFocusClassTouchScreen();
+ }
+
+ siteNavigation.find( 'a' ).on( 'focus.twentysixteen blur.twentysixteen', function() {
+ $( this ).parents( '.menu-item' ).toggleClass( 'focus' );
+ } );
+ } )();
+
+ // Add the default ARIA attributes for the menu toggle and the navigations.
+ function onResizeARIA() {
+ if ( window.innerWidth < 910 ) {
+ if ( menuToggle.hasClass( 'toggled-on' ) ) {
+ menuToggle.attr( 'aria-expanded', 'true' );
+ } else {
+ menuToggle.attr( 'aria-expanded', 'false' );
+ }
+
+ if ( siteHeaderMenu.hasClass( 'toggled-on' ) ) {
+ siteNavigation.attr( 'aria-expanded', 'true' );
+ socialNavigation.attr( 'aria-expanded', 'true' );
+ } else {
+ siteNavigation.attr( 'aria-expanded', 'false' );
+ socialNavigation.attr( 'aria-expanded', 'false' );
+ }
+
+ menuToggle.attr( 'aria-controls', 'site-navigation social-navigation' );
+ } else {
+ menuToggle.removeAttr( 'aria-expanded' );
+ siteNavigation.removeAttr( 'aria-expanded' );
+ socialNavigation.removeAttr( 'aria-expanded' );
+ menuToggle.removeAttr( 'aria-controls' );
+ }
+ }
+
+ // Add 'below-entry-meta' class to elements.
+ function belowEntryMetaClass( param ) {
+ if ( body.hasClass( 'page' ) || body.hasClass( 'search' ) || body.hasClass( 'single-attachment' ) || body.hasClass( 'error404' ) ) {
+ return;
+ }
+
+ $( '.entry-content' ).find( param ).each( function() {
+ var element = $( this ),
+ elementPos = element.offset(),
+ elementPosTop = elementPos.top,
+ entryFooter = element.closest( 'article' ).find( '.entry-footer' ),
+ entryFooterPos = entryFooter.offset(),
+ entryFooterPosBottom = entryFooterPos.top + ( entryFooter.height() + 28 ),
+ caption = element.closest( 'figure' ),
+ newImg;
+
+ // Add 'below-entry-meta' to elements below the entry meta.
+ if ( elementPosTop > entryFooterPosBottom ) {
+
+ // Check if full-size images and captions are larger than or equal to 840px.
+ if ( 'img.size-full' === param ) {
+
+ // Create an image to find native image width of resized images (i.e. max-width: 100%).
+ newImg = new Image();
+ newImg.src = element.attr( 'src' );
+
+ $( newImg ).load( function() {
+ if ( newImg.width >= 840 ) {
+ element.addClass( 'below-entry-meta' );
+
+ if ( caption.hasClass( 'wp-caption' ) ) {
+ caption.addClass( 'below-entry-meta' );
+ caption.removeAttr( 'style' );
+ }
+ }
+ } );
+ } else {
+ element.addClass( 'below-entry-meta' );
+ }
+ } else {
+ element.removeClass( 'below-entry-meta' );
+ caption.removeClass( 'below-entry-meta' );
+ }
+ } );
+ }
+
+ $( document ).ready( function() {
+ body = $( document.body );
+
+ $( window )
+ .on( 'load.twentysixteen', onResizeARIA )
+ .on( 'resize.twentysixteen', function() {
+ clearTimeout( resizeTimer );
+ resizeTimer = setTimeout( function() {
+ belowEntryMetaClass( 'img.size-full' );
+ belowEntryMetaClass( 'blockquote.alignleft, blockquote.alignright' );
+ }, 300 );
+ onResizeARIA();
+ } );
+
+ belowEntryMetaClass( 'img.size-full' );
+ belowEntryMetaClass( 'blockquote.alignleft, blockquote.alignright' );
+ } );
+} )( jQuery );
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