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