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/* global screenReaderText */ /** * Theme functions file. * * Contains handlers for navigation and widget area. */ ( function( $ ) { var $body, $window, $sidebar, adminbarOffset, top = false, bottom = false, windowWidth, windowHeight, lastWindowPos = 0, topOffset = 0, bodyHeight, sidebarHeight, resizeTimer, secondary, button; function initMainNavigation( container ) { // Add dropdown toggle that display child menu items. container.find( '.menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' ); // Toggle buttons and submenu items with active children menu items. container.find( '.current-menu-ancestor > button' ).addClass( 'toggle-on' ); container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' ); container.find( '.dropdown-toggle' ).click( function( e ) { var _this = $( this ); e.preventDefault(); _this.toggleClass( 'toggle-on' ); _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' ); _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' ); _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand ); } ); } initMainNavigation( $( '.main-navigation' ) ); // Re-initialize the main navigation when it is updated, persisting any existing submenu expanded states. $( document ).on( 'customize-preview-menu-refreshed', function( e, params ) { if ( 'primary' === params.wpNavMenuArgs.theme_location ) { initMainNavigation( params.newContainer ); // Re-sync expanded states from oldContainer. params.oldContainer.find( '.dropdown-toggle.toggle-on' ).each(function() { var containerId = $( this ).parent().prop( 'id' ); $( params.newContainer ).find( '#' + containerId + ' > .dropdown-toggle' ).triggerHandler( 'click' ); }); } }); secondary = $( '#secondary' ); button = $( '.site-branding' ).find( '.secondary-toggle' ); // Enable menu toggle for small screens. ( function() { var menu, widgets, social; if ( ! secondary.length || ! button.length ) { return; } // Hide button if there are no widgets and the menus are missing or empty. menu = secondary.find( '.nav-menu' ); widgets = secondary.find( '#widget-area' ); social = secondary.find( '#social-navigation' ); if ( ! widgets.length && ! social.length && ( ! menu.length || ! menu.children().length ) ) { button.hide(); return; } button.on( 'click.twentyfifteen', function() { secondary.toggleClass( 'toggled-on' ); secondary.trigger( 'resize' ); $( this ).toggleClass( 'toggled-on' ); if ( $( this, secondary ).hasClass( 'toggled-on' ) ) { $( this ).attr( 'aria-expanded', 'true' ); secondary.attr( 'aria-expanded', 'true' ); } else { $( this ).attr( 'aria-expanded', 'false' ); secondary.attr( 'aria-expanded', 'false' ); } } ); } )(); /** * @summary Add or remove ARIA attributes. * Uses jQuery's width() function to determine the size of the window and add * the default ARIA attributes for the menu toggle if it's visible. * @since Twenty Fifteen 1.1 */ function onResizeARIA() { if ( 955 > $window.width() ) { button.attr( 'aria-expanded', 'false' ); secondary.attr( 'aria-expanded', 'false' ); button.attr( 'aria-controls', 'secondary' ); } else { button.removeAttr( 'aria-expanded' ); secondary.removeAttr( 'aria-expanded' ); button.removeAttr( 'aria-controls' ); } } // Sidebar scrolling. function resize() { windowWidth = $window.width(); if ( 955 > windowWidth ) { top = bottom = false; $sidebar.removeAttr( 'style' ); } } function scroll() { var windowPos = $window.scrollTop(); if ( 955 > windowWidth ) { return; } sidebarHeight = $sidebar.height(); windowHeight = $window.height(); bodyHeight = $body.height(); if ( sidebarHeight + adminbarOffset > windowHeight ) { if ( windowPos > lastWindowPos ) { if ( top ) { top = false; topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); } else if ( ! bottom && windowPos + windowHeight > sidebarHeight + $sidebar.offset().top && sidebarHeight + adminbarOffset < bodyHeight ) { bottom = true; $sidebar.attr( 'style', 'position: fixed; bottom: 0;' ); } } else if ( windowPos < lastWindowPos ) { if ( bottom ) { bottom = false; topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); } else if ( ! top && windowPos + adminbarOffset < $sidebar.offset().top ) { top = true; $sidebar.attr( 'style', 'position: fixed;' ); } } else { top = bottom = false; topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0; $sidebar.attr( 'style', 'top: ' + topOffset + 'px;' ); } } else if ( ! top ) { top = true; $sidebar.attr( 'style', 'position: fixed;' ); } lastWindowPos = windowPos; } function resizeAndScroll() { resize(); scroll(); } $( document ).ready( function() { $body = $( document.body ); $window = $( window ); $sidebar = $( '#sidebar' ).first(); adminbarOffset = $body.is( '.admin-bar' ) ? $( '#wpadminbar' ).height() : 0; $window .on( 'scroll.twentyfifteen', scroll ) .on( 'load.twentyfifteen', onResizeARIA ) .on( 'resize.twentyfifteen', function() { clearTimeout( resizeTimer ); resizeTimer = setTimeout( resizeAndScroll, 500 ); onResizeARIA(); } ); $sidebar.on( 'click.twentyfifteen keydown.twentyfifteen', 'button', resizeAndScroll ); resizeAndScroll(); for ( var i = 1; i < 6; i++ ) { setTimeout( resizeAndScroll, 100 * i ); } } ); } )( jQuery );