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Diffstat (limited to 'themes/twentyfifteen/js/functions.js')
| -rw-r--r-- | themes/twentyfifteen/js/functions.js | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/themes/twentyfifteen/js/functions.js b/themes/twentyfifteen/js/functions.js new file mode 100644 index 00000000..2da5cbc3 --- /dev/null +++ b/themes/twentyfifteen/js/functions.js @@ -0,0 +1,178 @@ +/* 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 ); |