mirror of
https://github.com/WordPress/WordPress.git
synced 2024-10-06 03:27:48 +02:00
9e110f8aed
When a page is scrolled, the top nav menu become fixed. Depending on the page content this caused issue where focused links or buttons may be hidden behind the nav menu. Props afercia, davidakennedy, Fencer04 Fixes #38476 Built from https://develop.svn.wordpress.org/trunk@39225 git-svn-id: http://core.svn.wordpress.org/trunk@39165 1a063a9b-81f0-0310-95a4-ce76da25c4cd
214 lines
6.6 KiB
JavaScript
214 lines
6.6 KiB
JavaScript
/* global twentyseventeenScreenReaderText */
|
|
(function( $ ) {
|
|
|
|
// Variables and DOM Caching.
|
|
var $body = $( 'body' ),
|
|
$customHeader = $body.find( '.custom-header' ),
|
|
$customHeaderImage = $customHeader.find( '.custom-header-image' ),
|
|
$branding = $customHeader.find( '.site-branding' ),
|
|
$navigation = $body.find( '.navigation-top' ),
|
|
$navWrap = $navigation.find( '.wrap' ),
|
|
$navMenuItem = $navigation.find( '.menu-item' ),
|
|
$menuToggle = $navigation.find( '.menu-toggle' ),
|
|
$menuScrollDown = $body.find( '.menu-scroll-down' ),
|
|
$sidebar = $body.find( '#secondary' ),
|
|
$entryContent = $body.find( '.entry-content' ),
|
|
$formatQuote = $body.find( '.format-quote blockquote' ),
|
|
isFrontPage = $body.hasClass( 'twentyseventeen-front-page' ) || $body.hasClass( 'home blog' ),
|
|
navigationFixedClass = 'site-navigation-fixed',
|
|
navigationHeight,
|
|
navigationOuterHeight,
|
|
navPadding,
|
|
navMenuItemHeight,
|
|
idealNavHeight,
|
|
navIsNotTooTall,
|
|
headerOffset,
|
|
menuTop = 0,
|
|
resizeTimer;
|
|
|
|
// Ensure the sticky navigation doesn't cover current focused links.
|
|
$( 'a[href], area[href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, [tabindex], [contenteditable]', '.site-content-contain' ).filter( ':visible' ).focus( function() {
|
|
if ( $navigation.hasClass( 'site-navigation-fixed' ) ) {
|
|
var windowScrollTop = $( window ).scrollTop(),
|
|
fixedNavHeight = $navigation.height(),
|
|
itemScrollTop = $( this ).offset().top,
|
|
offsetDiff = itemScrollTop - windowScrollTop;
|
|
|
|
// Account for Admin bar.
|
|
if ( $( '#wpadminbar' ).length ) {
|
|
offsetDiff -= $( '#wpadminbar' ).height();
|
|
}
|
|
|
|
if ( offsetDiff < fixedNavHeight ) {
|
|
$( window ).scrollTo( itemScrollTop - ( fixedNavHeight + 50 ), 0 );
|
|
}
|
|
}
|
|
});
|
|
|
|
// Set properties of navigation.
|
|
function setNavProps() {
|
|
navigationHeight = $navigation.height();
|
|
navigationOuterHeight = $navigation.outerHeight();
|
|
navPadding = parseFloat( $navWrap.css( 'padding-top' ) ) * 2;
|
|
navMenuItemHeight = $navMenuItem.outerHeight() * 2;
|
|
idealNavHeight = navPadding + navMenuItemHeight;
|
|
navIsNotTooTall = navigationHeight <= idealNavHeight;
|
|
}
|
|
|
|
// Make navigation 'stick'.
|
|
function adjustScrollClass() {
|
|
|
|
// Make sure we're not on a mobile screen.
|
|
if ( 'none' === $menuToggle.css( 'display' ) ) {
|
|
|
|
// Make sure the nav isn't taller than two rows.
|
|
if ( navIsNotTooTall ) {
|
|
|
|
// When there's a custom header image, the header offset includes the height of the navigation.
|
|
if ( isFrontPage && $customHeaderImage.length ) {
|
|
headerOffset = $customHeader.innerHeight() - navigationOuterHeight;
|
|
} else {
|
|
headerOffset = $customHeader.innerHeight();
|
|
}
|
|
|
|
// If the scroll is more than the custom header, set the fixed class.
|
|
if ( $( window ).scrollTop() >= headerOffset ) {
|
|
$navigation.addClass( navigationFixedClass );
|
|
} else {
|
|
$navigation.removeClass( navigationFixedClass );
|
|
}
|
|
|
|
} else {
|
|
|
|
// Remove 'fixed' class if nav is taller than two rows.
|
|
$navigation.removeClass( navigationFixedClass );
|
|
}
|
|
}
|
|
}
|
|
|
|
// Set margins of branding in header.
|
|
function adjustHeaderHeight() {
|
|
if ( 'none' === $menuToggle.css( 'display' ) ) {
|
|
|
|
// The margin should be applied to different elements on front-page or home vs interior pages.
|
|
if ( isFrontPage ) {
|
|
$branding.css( 'margin-bottom', navigationOuterHeight );
|
|
} else {
|
|
$customHeader.css( 'margin-bottom', navigationOuterHeight );
|
|
}
|
|
|
|
} else {
|
|
$customHeader.css( 'margin-bottom', '0' );
|
|
$branding.css( 'margin-bottom', '0' );
|
|
}
|
|
}
|
|
|
|
// Set icon for quotes.
|
|
function setQuotesIcon() {
|
|
$( twentyseventeenScreenReaderText.quote ).prependTo( $formatQuote );
|
|
}
|
|
|
|
// Add 'below-entry-meta' class to elements.
|
|
function belowEntryMetaClass( param ) {
|
|
var sidebarPos, sidebarPosBottom;
|
|
|
|
if ( ! $body.hasClass( 'has-sidebar' ) || (
|
|
$body.hasClass( 'search' ) ||
|
|
$body.hasClass( 'single-attachment' ) ||
|
|
$body.hasClass( 'error404' ) ||
|
|
$body.hasClass( 'twentyseventeen-front-page' )
|
|
) ) {
|
|
return;
|
|
}
|
|
|
|
sidebarPos = $sidebar.offset();
|
|
sidebarPosBottom = sidebarPos.top + ( $sidebar.height() + 28 );
|
|
|
|
$entryContent.find( param ).each( function() {
|
|
var $element = $( this ),
|
|
elementPos = $element.offset(),
|
|
elementPosTop = elementPos.top;
|
|
|
|
// Add 'below-entry-meta' to elements below the entry meta.
|
|
if ( elementPosTop > sidebarPosBottom ) {
|
|
$element.addClass( 'below-entry-meta' );
|
|
} else {
|
|
$element.removeClass( 'below-entry-meta' );
|
|
}
|
|
});
|
|
}
|
|
|
|
/*
|
|
* Test if inline SVGs are supported.
|
|
* @link https://github.com/Modernizr/Modernizr/
|
|
*/
|
|
function supportsInlineSVG() {
|
|
var div = document.createElement( 'div' );
|
|
div.innerHTML = '<svg/>';
|
|
return 'http://www.w3.org/2000/svg' === ( 'undefined' !== typeof SVGRect && div.firstChild && div.firstChild.namespaceURI );
|
|
}
|
|
|
|
// Fire on document ready.
|
|
$( document ).ready( function() {
|
|
|
|
// If navigation menu is present on page, setNavProps and adjustScrollClass.
|
|
if ( $navigation.length ) {
|
|
setNavProps();
|
|
adjustScrollClass();
|
|
}
|
|
|
|
// If 'Scroll Down' arrow in present on page, calculate scroll offset and bind an event handler to the click event.
|
|
if ( $menuScrollDown.length ) {
|
|
|
|
if ( $( 'body' ).hasClass( 'admin-bar' ) ) {
|
|
menuTop -= 32;
|
|
}
|
|
if ( $( 'body' ).hasClass( 'blog' ) ) {
|
|
menuTop -= 30; // The div for latest posts has no space above content, add some to account for this.
|
|
}
|
|
if ( ! $navigation.length ) {
|
|
navigationOuterHeight = 0;
|
|
}
|
|
|
|
$menuScrollDown.click( function( e ) {
|
|
e.preventDefault();
|
|
$( window ).scrollTo( '#primary', {
|
|
duration: 600,
|
|
offset: { top: menuTop - navigationOuterHeight }
|
|
});
|
|
});
|
|
}
|
|
|
|
adjustHeaderHeight();
|
|
setQuotesIcon();
|
|
if ( true === supportsInlineSVG() ) {
|
|
document.documentElement.className = document.documentElement.className.replace( /(\s*)no-svg(\s*)/, '$1svg$2' );
|
|
}
|
|
});
|
|
|
|
// If navigation menu is present on page, adjust it on scroll and screen resize.
|
|
if ( $navigation.length ) {
|
|
|
|
// On scroll, we want to stick/unstick the navigation.
|
|
$( window ).on( 'scroll', function() {
|
|
adjustScrollClass();
|
|
adjustHeaderHeight();
|
|
});
|
|
|
|
// Also want to make sure the navigation is where it should be on resize.
|
|
$( window ).resize( function() {
|
|
setNavProps();
|
|
setTimeout( adjustScrollClass, 500 );
|
|
});
|
|
}
|
|
|
|
$( window ).resize( function() {
|
|
clearTimeout( resizeTimer );
|
|
resizeTimer = setTimeout( function() {
|
|
belowEntryMetaClass( 'blockquote.alignleft, blockquote.alignright' );
|
|
}, 300 );
|
|
setTimeout( adjustHeaderHeight, 1000 );
|
|
});
|
|
|
|
})( jQuery );
|