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<?php
/**
* Class AMP_Core_Theme_Sanitizer.
*
* @package AMP
* @since 1.0
*/
/**
* Class AMP_Core_Theme_Sanitizer
*
* Fixes up common issues in core themes and others.
*
* @see AMP_Validation_Error_Taxonomy::accept_core_theme_validation_errors()
* @since 1.0
*/
class AMP_Core_Theme_Sanitizer extends AMP_Base_Sanitizer {
/**
* Array of flags used to control sanitization.
*
* @since 1.0
* @var array {
* @type string $stylesheet Stylesheet slug.
* @type string $template Template slug.
* @type array $theme_features List of theme features that need to be applied. Features are method names,
* }
*/
protected $args;
/**
* Body element.
*
* @since 1.0
* @var DOMElement
*/
protected $body;
/**
* XPath.
*
* @since 1.0
* @var DOMXPath
*/
protected $xpath;
/**
* Config for features needed by themes.
*
* @since 1.0
* @var array
*/
protected static $theme_features = [
// Twenty Twenty.
'twentytwenty' => [
'dequeue_scripts' => [
'twentytwenty-js',
],
'remove_actions' => [
'wp_head' => [
'twentytwenty_no_js_class', // AMP is essentially no-js, with any interactivity added explicitly via amp-bind.
],
'wp_print_footer_scripts' => [
'twentytwenty_skip_link_focus_fix', // See <https://github.com/WordPress/twentynineteen/pull/47>.
],
],
'add_smooth_scrolling' => [
// @todo Only replaces twentytwenty.smoothscroll.scrollToAnchor, but not twentytwenty.smoothscroll.scrollToElement
'//a[ starts-with( @href, "#" ) and not( @href = "#" )and not( @href = "#0" ) and not( contains( @class, "do-not-scroll" ) ) and not( contains( @class, "skip-link" ) ) ]',
],
'add_twentytwenty_modals' => [],
'add_twentytwenty_toggles' => [],
'add_nav_menu_styles' => [],
'add_twentytwenty_masthead_styles' => [],
'add_twentytwenty_current_page_awareness' => [],
],
// Twenty Nineteen.
'twentynineteen' => [
'dequeue_scripts' => [
'twentynineteen-skip-link-focus-fix', // This is part of AMP. See <https://github.com/ampproject/amphtml/issues/18671>.
'twentynineteen-priority-menu',
'twentynineteen-touch-navigation', // @todo There could be an AMP implementation of this, similar to what is implemented on ampproject.org.
],
'remove_actions' => [
'wp_print_footer_scripts' => [
'twentynineteen_skip_link_focus_fix', // See <https://github.com/WordPress/twentynineteen/pull/47>.
],
],
'add_twentynineteen_masthead_styles' => [],
'adjust_twentynineteen_images' => [],
],
// Twenty Seventeen.
'twentyseventeen' => [
// @todo Try to implement belowEntryMetaClass().
'dequeue_scripts' => [
'twentyseventeen-html5', // Only relevant for IE<9.
'twentyseventeen-global', // There are somethings not yet implemented in AMP. See todos below.
'jquery-scrollto', // Implemented via add_smooth_scrolling().
'twentyseventeen-navigation', // Handled by add_nav_menu_styles, add_nav_menu_toggle, add_nav_sub_menu_buttons.
'twentyseventeen-skip-link-focus-fix', // Unnecessary since part of the AMP runtime.
],
'remove_actions' => [
'wp_head' => [
'twentyseventeen_javascript_detection', // AMP is essentially no-js, with any interactivity added explicitly via amp-bind.
],
],
'force_fixed_background_support' => [],
'add_twentyseventeen_masthead_styles' => [],
'add_twentyseventeen_image_styles' => [],
'add_twentyseventeen_sticky_nav_menu' => [],
'add_has_header_video_body_class' => [],
'add_nav_menu_styles' => [
'sub_menu_button_toggle_class' => 'toggled-on',
'no_js_submenu_visible' => true,
],
'add_smooth_scrolling' => [
'//header[@id = "masthead"]//a[ contains( @class, "menu-scroll-down" ) ]',
],
'set_twentyseventeen_quotes_icon' => [],
'add_twentyseventeen_attachment_image_attributes' => [],
],
// Twenty Sixteen.
'twentysixteen' => [
// @todo Figure out an AMP solution for onResizeARIA().
// @todo Try to implement belowEntryMetaClass().
'dequeue_scripts' => [
'twentysixteen-script',
'twentysixteen-html5', // Only relevant for IE<9.
'twentysixteen-keyboard-image-navigation', // AMP does not yet allow for listening to keydown events.
'twentysixteen-skip-link-focus-fix', // Unnecessary since part of the AMP runtime.
],
'remove_actions' => [
'wp_head' => [
'twentysixteen_javascript_detection', // AMP is essentially no-js, with any interactivity added explicitly via amp-bind.
],
],
'add_nav_menu_styles' => [
'sub_menu_button_toggle_class' => 'toggled-on',
'no_js_submenu_visible' => true,
],
],
// Twenty Fifteen.
'twentyfifteen' => [
// @todo Figure out an AMP solution for onResizeARIA().
'dequeue_scripts' => [
'twentyfifteen-script',
'twentyfifteen-keyboard-image-navigation', // AMP does not yet allow for listening to keydown events.
'twentyfifteen-skip-link-focus-fix', // Unnecessary since part of the AMP runtime.
],
'remove_actions' => [
'wp_head' => [
'twentyfifteen_javascript_detection', // AMP is essentially no-js, with any interactivity added explicitly via amp-bind.
],
],
'add_nav_menu_styles' => [
'sub_menu_button_toggle_class' => 'toggle-on',
'no_js_submenu_visible' => true,
],
],
// Twenty Fourteen.
'twentyfourteen' => [
// @todo Figure out an AMP solution for onResizeARIA().
'dequeue_scripts' => [
'twentyfourteen-script',
'twentyfourteen-keyboard-image-navigation', // AMP does not yet allow for listening to keydown events.
'jquery-masonry', // Masonry style layout is not supported in AMP.
'twentyfourteen-slider',
],
'add_nav_menu_styles' => [],
'add_twentyfourteen_masthead_styles' => [],
'add_twentyfourteen_slider_carousel' => [],
'add_twentyfourteen_search' => [],
],
// Twenty Thirteen.
'twentythirteen' => [
'dequeue_scripts' => [
'jquery-masonry', // Masonry style layout is not supported in AMP.
'twentythirteen-script',
],
'add_nav_menu_toggle' => [],
'add_nav_sub_menu_buttons' => [],
'add_nav_menu_styles' => [],
],
// Twenty Twelve.
'twentytwelve' => [
'dequeue_scripts' => [
'twentytwelve-navigation',
],
'add_nav_menu_styles' => [],
],
'twentyeleven' => [],
'twentyten' => [],
];
/**
* Get list of supported core themes.
*
* @since 1.0
*
* @return string[] Slugs for supported themes.
*/
public static function get_supported_themes() {
return array_keys( self::$theme_features );
}
/**
* Get the acceptable validation errors.
*
* @since 1.0
*
* @param string $template Template.
* @return array Acceptable errors.
*/
public static function get_acceptable_errors( $template ) {
if ( isset( self::$theme_features[ $template ] ) ) {
return [
'illegal_css_at_rule' => [
[
'at_rule' => 'viewport',
],
[
'at_rule' => '-ms-viewport',
],
],
];
}
return [];
}
/**
* Adds extra theme support arguments on the fly.
*
* This method is neither a buffering hook nor a sanitization callback and is called manually by
* {@see AMP_Theme_Support}. Typically themes will add theme support directly and don't need such
* a method. In this case, it is a workaround for adding theme support on behalf of external themes.
*
* @since 1.1
*/
public static function extend_theme_support() {
$args = self::get_theme_support_args( get_template() );
if ( empty( $args ) ) {
return;
}
$support = AMP_Theme_Support::get_theme_support_args();
if ( ! is_array( $support ) ) {
$support = [];
}
add_theme_support( AMP_Theme_Support::SLUG, array_merge( $support, $args ) );
}
/**
* Returns extra arguments to pass to `add_theme_support()`.
*
* @since 1.1
*
* @param string $theme Theme slug.
* @return array Arguments to merge with existing theme support arguments.
*/
protected static function get_theme_support_args( $theme ) {
// phpcs:disable WordPress.WP.I18n.TextDomainMismatch
switch ( $theme ) {
case 'twentytwelve':
return [
'nav_menu_toggle' => [
'nav_container_xpath' => '//nav[ @id = "site-navigation" ]//ul',
'nav_container_toggle_class' => 'toggled-on',
'menu_button_xpath' => '//nav[ @id = "site-navigation" ]//button[ contains( @class, "menu-toggle" ) ]',
'menu_button_toggle_class' => 'toggled-on',
],
];
case 'twentythirteen':
return [
'nav_menu_toggle' => [
'nav_container_id' => 'site-navigation',
'nav_container_toggle_class' => 'toggled-on',
'menu_button_xpath' => '//nav[ @id = "site-navigation" ]//button[ contains( @class, "menu-toggle" ) ]',
],
'nav_menu_dropdown' => [
'sub_menu_button_class' => 'dropdown-toggle',
'sub_menu_button_toggle_class' => 'toggle-on',
'expand_text' => __( 'expand child menu', 'amp' ),
'collapse_text' => __( 'collapse child menu', 'amp' ),
],
'nav_menu_styles' => [],
];
case 'twentyfourteen':
return [
'nav_menu_toggle' => [
'nav_container_id' => 'primary-navigation',
'nav_container_toggle_class' => 'toggled-on',
'menu_button_xpath' => '//header[ @id = "masthead" ]//button[ contains( @class, "menu-toggle" ) ]',
'menu_button_toggle_class' => '',
],
];
case 'twentyfifteen':
return [
'nav_menu_toggle' => [
'nav_container_id' => 'secondary',
'nav_container_toggle_class' => 'toggled-on',
'menu_button_xpath' => '//header[ @id = "masthead" ]//button[ contains( @class, "secondary-toggle" ) ]',
'menu_button_toggle_class' => 'toggled-on',
],
'nav_menu_dropdown' => [
'sub_menu_button_class' => 'dropdown-toggle',
'sub_menu_button_toggle_class' => 'toggle-on',
'expand_text ' => __( 'expand child menu', 'twentyfifteen' ),
'collapse_text' => __( 'collapse child menu', 'twentyfifteen' ),
],
];
case 'twentysixteen':
return [
'nav_menu_toggle' => [
'nav_container_id' => 'site-header-menu',
'nav_container_toggle_class' => 'toggled-on',
'menu_button_xpath' => '//header[@id = "masthead"]//button[ @id = "menu-toggle" ]',
'menu_button_toggle_class' => 'toggled-on',
],
'nav_menu_dropdown' => [
'sub_menu_button_class' => 'dropdown-toggle',
'sub_menu_button_toggle_class' => 'toggled-on',
'expand_text ' => __( 'expand child menu', 'twentysixteen' ),
'collapse_text' => __( 'collapse child menu', 'twentysixteen' ),
],
];
case 'twentyseventeen':
$config = [
'nav_menu_toggle' => [
'nav_container_id' => 'site-navigation',
'nav_container_toggle_class' => 'toggled-on',
'menu_button_xpath' => '//nav[@id = "site-navigation"]//button[ contains( @class, "menu-toggle" ) ]',
'menu_button_toggle_class' => 'toggled-on',
],
'nav_menu_dropdown' => [
'sub_menu_button_class' => 'dropdown-toggle',
'sub_menu_button_toggle_class' => 'toggled-on',
'expand_text ' => __( 'expand child menu', 'twentyseventeen' ),
'collapse_text' => __( 'collapse child menu', 'twentyseventeen' ),
],
];
if ( function_exists( 'twentyseventeen_get_svg' ) ) {
$config['nav_menu_dropdown']['icon'] = twentyseventeen_get_svg(
[
'icon' => 'angle-down',
'fallback' => true,
]
);
}
return $config;
}
// phpcs:enable WordPress.WP.I18n.TextDomainMismatch
return [];
}
/**
* Get theme config.
*
* @since 1.0
* @deprecated 1.1
*
* @param string $theme Theme slug.
* @return array Class names.
*/
protected static function get_theme_config( $theme ) {
_deprecated_function( __METHOD__, '1.1' );
$args = self::get_theme_support_args( $theme );
// This returns arguments in a backward-compatible way.
return array_merge( $args['nav_menu_toggle'], $args['nav_menu_dropdown'] );
}
/**
* Find theme features for core theme.
*
* @since 1.0
*
* @param array $args Args.
* @param bool $static Static. that is, whether should run during output buffering.
* @return array Theme features.
*/
protected static function get_theme_features( $args, $static = false ) {
$theme_features = [];
$theme_candidates = wp_array_slice_assoc( $args, [ 'stylesheet', 'template' ] );
foreach ( $theme_candidates as $theme_candidate ) {
if ( isset( self::$theme_features[ $theme_candidate ] ) ) {
$theme_features = self::$theme_features[ $theme_candidate ];
break;
}
}
// Allow specific theme features to be requested even if the theme is not in core.
if ( isset( $args['theme_features'] ) ) {
$theme_features = array_merge( $args['theme_features'], $theme_features );
}
$final_theme_features = [];
foreach ( $theme_features as $theme_feature => $feature_args ) {
if ( ! method_exists( __CLASS__, $theme_feature ) ) {
continue;
}
try {
$reflection = new ReflectionMethod( __CLASS__, $theme_feature );
if ( $reflection->isStatic() === $static ) {
$final_theme_features[ $theme_feature ] = $feature_args;
}
} catch ( Exception $e ) {
unset( $e );
}
}
return $final_theme_features;
}
/**
* Add filters to manipulate output during output buffering before the DOM is constructed.
*
* @since 1.0
*
* @param array $args Args.
*/
public static function add_buffering_hooks( $args = [] ) {
$theme_features = self::get_theme_features( $args, true );
foreach ( $theme_features as $theme_feature => $feature_args ) {
if ( method_exists( __CLASS__, $theme_feature ) ) {
call_user_func( [ __CLASS__, $theme_feature ], $feature_args );
}
}
}
/**
* Add filter to output the quote icons in front of the article content.
*
* This is only used in Twenty Seventeen.
*
* @since 1.0
* @link https://github.com/WordPress/wordpress-develop/blob/f4580c122b7d0d2d66d22f806c6fe6e11023c6f0/src/wp-content/themes/twentyseventeen/assets/js/global.js#L105-L108
*/
public static function set_twentyseventeen_quotes_icon() {
add_filter(
'the_content',
static function ( $content ) {
// Why isn't Twenty Seventeen doing this to begin with? Why is it using JS to add the quote icon?
if ( function_exists( 'twentyseventeen_get_svg' ) && 'quote' === get_post_format() ) {
$icon = twentyseventeen_get_svg( [ 'icon' => 'quote-right' ] );
$content = preg_replace( '#(<blockquote.*?>)#s', '$1' . $icon, $content );
}
return $content;
}
);
}
/**
* Add filter to adjust the attachment image attributes to ensure attachment pages have a consistent <amp-img> rendering.
*
* This is only used in Twenty Seventeen.
*
* @since 1.0
* @link https://github.com/WordPress/wordpress-develop/blob/ddc8f803c6e99118998191fd2ea24124feb53659/src/wp-content/themes/twentyseventeen/functions.php#L545:L554
*/
public static function add_twentyseventeen_attachment_image_attributes() {
/*
* The max-height of the `.custom-logo-link img` is defined as being 80px, unless
* there is header media in which case it is 200px. Issues related to vertically-squashed
* images can be avoided if we just make sure that the image has this height to begin with.
*/
add_filter(
'get_custom_logo',
static function( $html ) {
$src = wp_get_attachment_image_src( get_theme_mod( 'custom_logo' ), 'full' );
if ( ! $src ) {
return $html;
}
if ( 'blank' === get_header_textcolor() && has_custom_header() ) {
$height = 200;
} else {
$height = 80;
}
$width = $height * ( $src[1] / $src[2] ); // Note that float values are allowed.
$html = preg_replace( '/(?<=width=")\d+(?=")/', $width, $html );
$html = preg_replace( '/(?<=height=")\d+(?=")/', $height, $html );
return $html;
}
);
}
/**
* Fix up core themes to do things in the AMP way.
*
* @since 1.0
*/
public function sanitize() {
$this->body = $this->dom->getElementsByTagName( 'body' )->item( 0 );
if ( ! $this->body ) {
return;
}
$this->xpath = new DOMXPath( $this->dom );
$theme_features = self::get_theme_features( $this->args, false );
foreach ( $theme_features as $theme_feature => $feature_args ) {
if ( method_exists( $this, $theme_feature ) ) {
$this->$theme_feature( $feature_args );
}
}
}
/**
* Dequeue scripts.
*
* @since 1.0
*
* @param string[] $handles Handles, where each item value is the script handle.
*/
public static function dequeue_scripts( $handles = [] ) {
add_action(
'wp_enqueue_scripts',
static function() use ( $handles ) {
foreach ( $handles as $handle ) {
wp_dequeue_script( $handle );
}
},
PHP_INT_MAX
);
}
/**
* Remove actions.
*
* @since 1.0
*
* @param array $actions Actions, with action name as key and value being callback.
*/
public static function remove_actions( $actions = [] ) {
foreach ( $actions as $action => $callbacks ) {
foreach ( $callbacks as $callback ) {
$priority = has_action( $action, $callback );
if ( false !== $priority ) {
remove_action( $action, $callback, $priority );
}
}
}
}
/**
* Add smooth scrolling from link to target element.
*
* @since 1.0
*
* @param string[] $link_xpaths XPath queries to the links that should smooth scroll.
*/
public function add_smooth_scrolling( $link_xpaths ) {
foreach ( $link_xpaths as $link_xpath ) {
foreach ( $this->xpath->query( $link_xpath ) as $link ) {
if ( $link instanceof DOMElement && preg_match( '/#(.+)/', $link->getAttribute( 'href' ), $matches ) ) {
$link->setAttribute( 'on', sprintf( 'tap:%s.scrollTo(duration=600)', $matches[1] ) );
// Prevent browser from jumping immediately to the link target.
$link->removeAttribute( 'href' );
$link->setAttribute( 'tabindex', '0' );
$link->setAttribute( 'role', 'button' );
}
}
}
}
/**
* Force SVG support, replacing no-svg class name with svg class name.
*
* @since 1.0
*
* @link https://github.com/WordPress/wordpress-develop/blob/1af1f65a21a1a697fb5f33027497f9e5ae638453/src/wp-content/themes/twentyseventeen/assets/js/global.js#L211-L213
* @link https://caniuse.com/#feat=svg
*/
public function force_svg_support() {
$class = $this->dom->documentElement->getAttribute( 'class' );
if ( $class ) {
$count = 0;
$class = preg_replace(
'/(^|\s)no-svg(\s|$)/',
' svg ',
$class,
-1,
$count
);
if ( $count > 0 ) {
$this->dom->documentElement->setAttribute( 'class', $class );
}
}
}
/**
* Force support for fixed background-attachment.
*
* @since 1.0
*
* @link https://github.com/WordPress/wordpress-develop/blob/1af1f65a21a1a697fb5f33027497f9e5ae638453/src/wp-content/themes/twentyseventeen/assets/js/global.js#L215-L217
* @link https://caniuse.com/#feat=background-attachment
*/
public function force_fixed_background_support() {
$this->dom->documentElement->setAttribute(
'class',
$this->dom->documentElement->getAttribute( 'class' ) . ' background-fixed'
);
}
/**
* Add body class when there is a header video.
*
* @since 1.0
* @link https://github.com/WordPress/wordpress-develop/blob/a26c24226c6b131a0ed22c722a836c100d3ba254/src/wp-content/themes/twentyseventeen/assets/js/global.js#L244-L247
*
* @param array $args Args.
*/
public static function add_has_header_video_body_class( $args = [] ) {
$args = array_merge(
[
'class_name' => 'has-header-video',
],
$args
);
add_filter(
'body_class',
static function( $body_classes ) use ( $args ) {
if ( has_header_video() ) {
$body_classes[] = $args['class_name'];
}
return $body_classes;
}
);
}
/**
* Get the (common) navigation outer height.
*
* @todo If the nav menu has many items and it spans multiple rows, this will be too small.
* @link https://github.com/WordPress/wordpress-develop/blob/fd5ba80c5c3d9cf62348567073945e246285fbca/src/wp-content/themes/twentyseventeen/assets/js/global.js#L50
*
* @return int Navigation outer height.
*/
protected static function get_twentyseventeen_navigation_outer_height() {
return 72;
}
/**
* Add required styles for featured image header and image blocks in Twenty Twenty.
*/
public static function add_twentytwenty_masthead_styles() {
add_action(
'wp_enqueue_scripts',
static function() {
ob_start();
?>
<style>
.featured-media amp-img {
position: static;
}
.wp-block-image img {
display: block;
}
</style>
<?php
$styles = str_replace( [ '<style>', '</style>' ], '', ob_get_clean() );
wp_add_inline_style( get_template() . '-style', $styles );
},
11
);
}
/**
* Add required styles for featured image header in Twenty Nineteen.
*
* The following is necessary because the styles in the theme apply to the featured img,
* and the CSS parser will then convert the selectors to amp-img. Nevertheless, object-fit
* does not apply on amp-img and it needs to apply on an actual img.
*
* @link https://github.com/WordPress/wordpress-develop/blob/5.0/src/wp-content/themes/twentynineteen/style.css#L2276-L2299
* @since 1.0
*/
public static function add_twentynineteen_masthead_styles() {
add_action(
'wp_enqueue_scripts',
static function() {
ob_start();
?>
<style>
.site-header.featured-image .site-featured-image .post-thumbnail amp-img > img {
height: auto;
left: 50%;
max-width: 1000%;
min-height: 100%;
min-width: 100vw;
position: absolute;
top: 50%;
transform: translateX(-50%) translateY(-50%);
width: auto;
z-index: 1;
/* When image filters are active, make it grayscale to colorize it blue. */
}
@supports (object-fit: cover) {
.site-header.featured-image .site-featured-image .post-thumbnail amp-img > img {
height: 100%;
left: 0;
object-fit: cover;
top: 0;
transform: none;
width: 100%;
}
}
</style>
<?php
$styles = str_replace( [ '<style>', '</style>' ], '', ob_get_clean() );
wp_add_inline_style( get_template() . '-style', $styles );
},
11
);
}
/**
* Add required styles for video and image headers.
*
* This is currently used exclusively for Twenty Seventeen.
*
* @since 1.0
* @link https://github.com/WordPress/wordpress-develop/blob/1af1f65a21a1a697fb5f33027497f9e5ae638453/src/wp-content/themes/twentyseventeen/style.css#L1687
* @link https://github.com/WordPress/wordpress-develop/blob/1af1f65a21a1a697fb5f33027497f9e5ae638453/src/wp-content/themes/twentyseventeen/style.css#L1743
*/
public static function add_twentyseventeen_masthead_styles() {
/*
* The following is necessary because the styles in the theme apply to img and video,
* and the CSS parser will then convert the selectors to amp-img and amp-video respectively.
* Nevertheless, object-fit does not apply on amp-img and it needs to apply on an actual img.
*/
add_action(
'wp_enqueue_scripts',
static function() {
$is_front_page_layout = ( is_front_page() && 'posts' !== get_option( 'show_on_front' ) ) || ( is_home() && is_front_page() );
ob_start();
?>
<style>
.has-header-image .custom-header-media amp-img > img,
.has-header-video .custom-header-media amp-video > video{
position: fixed;
height: auto;
left: 50%;
max-width: 1000%;
min-height: 100%;
min-width: 100%;
min-width: 100vw; /* vw prevents 1px gap on left that 100% has */
width: auto;
top: 50%;
padding-bottom: 1px; /* Prevent header from extending beyond the footer */
-ms-transform: translateX(-50%) translateY(-50%);
-moz-transform: translateX(-50%) translateY(-50%);
-webkit-transform: translateX(-50%) translateY(-50%);
transform: translateX(-50%) translateY(-50%);
}
.has-header-image:not(.twentyseventeen-front-page):not(.home) .custom-header-media amp-img > img {
bottom: 0;
position: absolute;
top: auto;
-ms-transform: translateX(-50%) translateY(0);
-moz-transform: translateX(-50%) translateY(0);
-webkit-transform: translateX(-50%) translateY(0);
transform: translateX(-50%) translateY(0);
}
/* For browsers that support object-fit */
@supports ( object-fit: cover ) {
.has-header-image .custom-header-media amp-img > img,
.has-header-video .custom-header-media amp-video > video,
.has-header-image:not(.twentyseventeen-front-page):not(.home) .custom-header-media amp-img > img {
height: 100%;
left: 0;
-o-object-fit: cover;
object-fit: cover;
top: 0;
-ms-transform: none;
-moz-transform: none;
-webkit-transform: none;
transform: none;
width: 100%;
}
}
.navigation-top.site-navigation-fixed {
display: none;
}
/* This is needed by add_smooth_scrolling because it removes the [href] attribute. */
.menu-scroll-down {
cursor: pointer;
}
<?php if ( $is_front_page_layout && ! has_custom_header() ) : ?>
/* https://github.com/WordPress/wordpress-develop/blob/fd5ba80c5c3d9cf62348567073945e246285fbca/src/wp-content/themes/twentyseventeen/assets/js/global.js#L92-L94 */
.site-branding {
margin-bottom: <?php echo (int) AMP_Core_Theme_Sanitizer::get_twentyseventeen_navigation_outer_height(); ?>px;
}
<?php endif; ?>
@media screen and (min-width: 48em) {
/* Note that adjustHeaderHeight() is irrelevant with this change */
<?php if ( ! $is_front_page_layout ) : ?>
.navigation-top {
position: static;
}
<?php endif; ?>
/* Initial styles that amp-animations for navigationTopShow and navigationTopHide will override */
.navigation-top.site-navigation-fixed {
opacity: 0;
transform: translateY( -<?php echo (int) AMP_Core_Theme_Sanitizer::get_twentyseventeen_navigation_outer_height(); ?>px );
display: block;
}
}
</style>
<?php
$styles = str_replace( [ '<style>', '</style>' ], '', ob_get_clean() );
wp_add_inline_style( get_template() . '-style', $styles );
},
11
);
}
/**
* Override the featured image header styling in style.css.
* Used only for Twenty Seventeen.
*
* @since 1.0
* @link https://github.com/WordPress/wordpress-develop/blob/1af1f65a21a1a697fb5f33027497f9e5ae638453/src/wp-content/themes/twentyseventeen/style.css#L2100
*/
public static function add_twentyseventeen_image_styles() {
add_action(
'wp_enqueue_scripts',
static function() {
ob_start();
?>
<style>
/* Override the display: block in twentyseventeen/style.css, as <amp-img> is usually inline-block. */
.single-featured-image-header amp-img {
display: inline-block;
}
/* Because the <amp-img> is inline-block, its container needs this rule to center it. */
.single-featured-image-header {
text-align: center;
}
</style>
<?php
$styles = str_replace( [ '<style>', '</style>' ], '', ob_get_clean() );
wp_add_inline_style( get_template() . '-style', $styles );
},
11
);
}
/**
* Add sticky nav menu to Twenty Seventeen.
*
* This is implemented by cloning the navigation-top element, giving it a fixed position outside of the viewport,
* and then showing it at the top of the window as soon as the original nav begins to get scrolled out of view.
* In order to improve accessibility, the cloned nav gets aria-hidden=true and all of the links get tabindex=-1
* to prevent the keyboard from focusing on elements off the screen; it is not necessary to focus on the elements
* in the fixed nav menu because as soon as the original nav menu is focused then the window is scrolled to the
* top anyway.
*
* @since 1.0
*/
public function add_twentyseventeen_sticky_nav_menu() {
/**
* Elements.
*
* @var DOMElement $link
* @var DOMElement $element
* @var DOMElement $navigation_top
* @var DOMElement $navigation_top_fixed
*/
$navigation_top = $this->xpath->query( '//header[ @id = "masthead" ]//div[ contains( @class, "navigation-top" ) ]' )->item( 0 );
if ( ! $navigation_top ) {
return;
}
$navigation_top_fixed = $navigation_top->cloneNode( true );
$navigation_top_fixed->setAttribute( 'class', $navigation_top_fixed->getAttribute( 'class' ) . ' site-navigation-fixed' );
$navigation_top_fixed->setAttribute( 'aria-hidden', 'true' );
foreach ( $navigation_top_fixed->getElementsByTagName( 'a' ) as $link ) {
$link->setAttribute( 'tabindex', '-1' );
}
$navigation_top->parentNode->insertBefore( $navigation_top_fixed, $navigation_top->nextSibling );
foreach ( $this->xpath->query( './/*[ @id ]', $navigation_top_fixed ) as $element ) {
$element->setAttribute( 'id', $element->getAttribute( 'id' ) . '-fixed' );
}
$attributes = [
'layout' => 'nodisplay',
'intersection-ratios' => 1,
'on' => implode(
';',
[
'exit:navigationTopShow.start',
'enter:navigationTopHide.start',
]
),
];
if ( is_admin_bar_showing() ) {
$attributes['viewport-margins'] = '32px 0';
}
$position_observer = AMP_DOM_Utils::create_node( $this->dom, 'amp-position-observer', $attributes );
$navigation_top->appendChild( $position_observer );
$animations = [
'navigationTopShow' => [
'duration' => 0,
'fill' => 'both',
'animations' => [
'selector' => '.navigation-top.site-navigation-fixed',
'media' => '(min-width: 48em)',
'keyframes' => [
'opacity' => 1.0,
'transform' => 'translateY( 0 )',
],
],
],
'navigationTopHide' => [
'duration' => 0,
'fill' => 'both',
'animations' => [
'selector' => '.navigation-top.site-navigation-fixed',
'media' => '(min-width: 48em)',
'keyframes' => [
'opacity' => 0.0,
'transform' => sprintf( 'translateY( -%dpx )', self::get_twentyseventeen_navigation_outer_height() ),
],
],
],
];
foreach ( $animations as $animation_id => $animation ) {
$amp_animation = AMP_DOM_Utils::create_node(
$this->dom,
'amp-animation',
[
'id' => $animation_id,
'layout' => 'nodisplay',
]
);
$position_script = $this->dom->createElement( 'script' );
$position_script->setAttribute( 'type', 'application/json' );
$position_script->appendChild( $this->dom->createTextNode( wp_json_encode( $animation ) ) );
$amp_animation->appendChild( $position_script );
$this->body->appendChild( $amp_animation );
}
}
/**
* Add styles for the nav menu specifically to deal with AMP running in a no-js context.
*
* @since 1.0
*
* @param array $args Args.
*/
public static function add_nav_menu_styles( $args = [] ) {
add_action(
'wp_enqueue_scripts',
static function() use ( $args ) {
ob_start();
?>
<style>
<?php if ( ! empty( $args['no_js_submenu_visible'] ) ) : ?>
/* Override no-js selector in parent theme. */
<?php
$selector = is_string( $args['no_js_submenu_visible'] ) ? $args['no_js_submenu_visible'] : '.no-js .main-navigation ul ul';
?>
<?php echo esc_html( $selector ); ?> {
display: none;
}
<?php endif; ?>
<?php if ( ! empty( $args['sub_menu_button_toggle_class'] ) ) : ?>
/* Use sibling selector and re-use class on button instead of toggling toggle-on class on ul.sub-menu */
.main-navigation ul .<?php echo esc_html( $args['sub_menu_button_toggle_class'] ); ?> + .sub-menu {
display: block;
}
<?php endif; ?>
<?php if ( 'twentytwenty' === get_template() ) : ?>
.cover-modal {
display: inherit;
}
.menu-modal-inner {
height: 100%;
}
.admin-bar .cover-modal {
/* Use padding to shift down modal because amp-lightbox has top:0 !important. */
padding-top: 32px;
}
@media (max-width: 782px) {
.admin-bar .cover-modal {
/* Use padding to shift down modal because amp-lightbox has top:0 !important. */
padding-top: 46px;
}
}
}
<?php elseif ( 'twentyseventeen' === get_template() ) : ?>
/* Show the button*/
.no-js .menu-toggle {
display: block;
}
.no-js .main-navigation > div > ul {
display: none;
}
.no-js .main-navigation.toggled-on > div > ul {
display: block;
}
@media screen and (min-width: 48em) {
.no-js .menu-toggle,
.no-js .dropdown-toggle {
display: none;
}
.no-js .main-navigation ul,
.no-js .main-navigation ul ul,
.no-js .main-navigation > div > ul {
display: block;
}
}
<?php elseif ( 'twentysixteen' === get_template() ) : ?>
@media screen and (max-width: 56.875em) {
/* Show the button*/
.no-js .menu-toggle {
display: block;
}
.no-js .site-header-menu {
display: none;
}
.no-js .site-header-menu.toggled-on {
display: block;
}
}
@media screen and (min-width: 56.875em) {
.no-js .main-navigation ul ul {
display: block;
}
}
<?php elseif ( 'twentyfifteen' === get_template() ) : ?>
@media screen and (min-width: 59.6875em) {
/* Attempt to emulate https://github.com/WordPress/wordpress-develop/blob/5e9a39baa7d4368f7d3c36dcbcd53db6317677c9/src/wp-content/themes/twentyfifteen/js/functions.js#L108-L149 */
#sidebar {
position: sticky;
top: -9vh;
max-height: 109vh;
overflow-y: auto;
}
}
<?php elseif ( 'twentythirteen' === get_template() ) : ?>
@media (min-width: 644px) {
.dropdown-toggle {
display: none;
}
}
@media (max-width: 643px) {
.nav-menu .toggle-on + .sub-menu {
clip: inherit;
overflow: inherit;
height: inherit;
width: inherit;
}
/* Override :hover selector rules in theme which would cause submenu to persist open. */
ul.nav-menu li:hover button:not( .toggle-on ) + ul,
.nav-menu ul li:hover button:not( .toggle-on ) + ul {
height: 1px;
width: 1px;
overflow: hidden;
clip: rect(1px, 1px, 1px, 1px);
}
.menu-item-has-children {
position: relative;
}
.dropdown-toggle {
-moz-osx-font-smoothing: grayscale;
-webkit-font-smoothing: antialiased;
display: inline-block;
font-size: 16px;
font-style: normal;
font-weight: normal;
font-variant: normal;
line-height: 1;
text-align: center;
text-decoration: inherit;
text-transform: none;
vertical-align: top;
border: 0;
box-sizing: content-box;
content: "";
height: 42px;
padding: 0;
background: transparent;
width: 42px;
position: absolute;
top: 3px;
<?php if ( is_rtl() ) : ?>
left: 0;
<?php else : ?>
right: 0;
<?php endif; ?>
}
.dropdown-toggle:active,
.dropdown-toggle:focus,
.dropdown-toggle:hover {
padding: 0;
border: 0;
background: transparent;
}
.dropdown-toggle:after {
color: #333;
speak: none;
font-family: "Genericons";
content: "\f431";
font-size: 24px;
line-height: 42px;
position: relative;
top: 0;
width: 42px;
<?php if ( is_rtl() ) : ?>
left: 1px;
<?php else : ?>
right: 1px;
<?php endif; ?>
}
.dropdown-toggle.toggle-on:after {
content: "\f432";
}
.dropdown-toggle:hover,
.dropdown-toggle:focus {
background-color: rgba(51, 51, 51, 0.1);
.dropdown-toggle:focus {
outline: 1px solid rgba(51, 51, 51, 0.3);
}
}
<?php endif; ?>
</style>
<?php
$styles = str_replace( [ '<style>', '</style>' ], '', ob_get_clean() );
wp_add_inline_style( get_template() . '-style', $styles );
},
11
);
}
/**
* Adjust images in twentynineteen.
*
* @since 1.1
*/
public static function adjust_twentynineteen_images() {
// Make sure the featured image gets responsive layout.
add_filter(
'wp_get_attachment_image_attributes',
static function( $attributes ) {
if ( preg_match( '/(^|\s)(attachment-post-thumbnail)(\s|$)/', $attributes['class'] ) ) {
$attributes['data-amp-layout'] = 'responsive';
}
return $attributes;
}
);
}
/**
* Add styles for Twenty Fourteen masthead.
*
* @since 1.1
*/
public static function add_twentyfourteen_masthead_styles() {
add_action(
'wp_enqueue_scripts',
static function() {
ob_start();
?>
<style>
/* Styles for featured content */
.grid #featured-content .post-thumbnail,
.slider #featured-content .post-thumbnail {
padding-top: 0; /* Override responsive hack which is handled by AMP layout. */
overflow: visible;
}
.featured-content .post-thumbnail amp-img {
position: static;
left: auto;
top: auto;
}
.slider #featured-content .hentry {
display: block;
}
/*
* The following are needed because clicking on the :before pseudo element does not trigger a tap event.
* So instead of positioning the screen reader text off screen, we just position it to cover cover the
* toggle button entirely, with a zero opacity.
*/
.search-toggle {
position: relative;
}
.search-toggle > a.screen-reader-text {
left: 0;
top: 0;
right: 0;
bottom: 0;
width: auto;
height: auto;
clip: unset;
opacity: 0;
}
<?php if ( 'slider' === get_theme_mod( 'featured_content_layout' ) ) : ?>
/*
* Styles for slider carousel.
*/
.featured-content-inner > amp-carousel {
position: relative;
}
body.slider amp-carousel > .amp-carousel-button {
-webkit-font-smoothing: antialiased;
background-color: black;
background-image: none;
border-radius: 0;
border-color: #fff;
border-style: solid;
border-width: 2px 1px 0 0;
box-sizing: border-box;
cursor: pointer;
display: inline-block;
font: normal 16px/1 Genericons;
height: 48px;
left: auto;
opacity: 1;
text-align: center;
text-decoration: inherit;
top: auto;
width: 50%;
transform: none;
}
body.slider amp-carousel > .amp-carousel-button:focus {
outline: white thin dotted;
}
body.slider amp-carousel > .amp-carousel-button:hover {
background-color: #24890d;
outline: none;
}
body.slider amp-carousel > .amp-carousel-button-prev:before {
color: #fff;
content: "\f430";
font-size: 32px;
line-height: 46px;
}
body.slider amp-carousel > .amp-carousel-button-next:before {
color: #fff;
content: "\f429";
font-size: 32px;
line-height: 46px;
}
.featured-content .post-thumbnail amp-img > img {
object-fit: cover;
object-position: top;
}
@media screen and (max-width: 672px) {
.slider-control-paging {
float: none;
margin: 0;
}
.featured-content .post-thumbnail amp-img {
height: 55.49132947vw;
}
.slider-control-paging li {
display: inline-block;
float: none;
}
}
@media screen and (min-width: 673px) {
body.slider amp-carousel > .amp-carousel-button {
width: 48px;
border: 0;
bottom: 0;
}
body.slider amp-carousel > .amp-carousel-button-prev {
right: 50px;
}
body.slider amp-carousel > .amp-carousel-button-next {
right: 0;
}
}
<?php endif; ?>
</style>
<?php
$css = str_replace( [ '<style>', '</style>' ], '', ob_get_clean() );
wp_add_inline_style( 'twentyfourteen-style', $css );
},
11
);
}
/**
* Add amp-carousel for slider in Twenty Fourteen.
*
* @since 1.1
*/
public function add_twentyfourteen_slider_carousel() {
if ( 'slider' !== get_theme_mod( 'featured_content_layout' ) ) {
return;
}
$featured_content = $this->dom->getElementById( 'featured-content' );
if ( ! $featured_content ) {
return;
}
$featured_content_inner = $this->xpath->query( './div[ @class = "featured-content-inner" ]', $featured_content )->item( 0 );
if ( ! $featured_content_inner ) {
return;
}
$selected_slide_default = 0;
$selected_slide_state_id = 'twentyFourteenSelectedSlide';
// Create the slider state.
$amp_state = $this->dom->createElement( 'amp-state' );
$amp_state->setAttribute( 'id', $selected_slide_state_id );
$script = $this->dom->createElement( 'script' );
$script->setAttribute( 'type', 'application/json' );
$script->appendChild( $this->dom->createTextNode( wp_json_encode( $selected_slide_default ) ) );
$amp_state->appendChild( $script );
$featured_content->appendChild( $amp_state );
// Create the carousel slider.
$amp_carousel_desktop_id = 'twentyFourteenSliderDesktop';
$amp_carousel_mobile_id = 'twentyFourteenSliderMobile';
$amp_carousel_attributes = [
'layout' => 'responsive',
'on' => "slideChange:AMP.setState( { $selected_slide_state_id: event.index } )",
'width' => '100',
'type' => 'slides',
'loop' => '',
AMP_DOM_Utils::AMP_BIND_DATA_ATTR_PREFIX . 'slide' => $selected_slide_state_id,
];
$amp_carousel_desktop = AMP_DOM_Utils::create_node(
$this->dom,
'amp-carousel',
array_merge(
$amp_carousel_attributes,
[
'id' => $amp_carousel_desktop_id,
'media' => '(min-width: 672px)',
'height' => '55.49132947', // Value comes from <https://github.com/WordPress/wordpress-develop/blob/fc2a8f0e11316d066a686995b8578d82cd5546cf/src/wp-content/themes/twentyfourteen/style.css#L3024>.
]
)
);
$amp_carousel_mobile = AMP_DOM_Utils::create_node(
$this->dom,
'amp-carousel',
array_merge(
$amp_carousel_attributes,
[
'id' => $amp_carousel_mobile_id,
'media' => '(max-width: 672px)',
'height' => '73',
]
)
);
while ( $featured_content_inner->firstChild ) {
$node = $featured_content_inner->removeChild( $featured_content_inner->firstChild );
$amp_carousel_desktop->appendChild( $node );
$amp_carousel_mobile->appendChild( $node->cloneNode( true ) );
}
$featured_content_inner->appendChild( $amp_carousel_desktop );
$featured_content_inner->appendChild( $amp_carousel_mobile );
// Create the selector.
$amp_selector = $this->dom->createElement( 'amp-selector' );
$amp_selector->setAttribute( 'layout', 'container' );
$slider_control_nav = $this->dom->createElement( 'ol' );
$slider_control_nav->setAttribute( 'class', 'slider-control-nav slider-control-paging' );
$count = $amp_carousel_desktop->getElementsByTagName( 'article' )->length;
for ( $i = 0; $i < $count; $i++ ) {
$li = $this->dom->createElement( 'li' );
$a = $this->dom->createElement( 'a' );
if ( $selected_slide_default === $i ) {
$li->setAttribute( 'selected', '' );
$a->setAttribute( 'class', 'slider-active' );
}
$a->setAttribute( AMP_DOM_Utils::AMP_BIND_DATA_ATTR_PREFIX . 'class', "$selected_slide_state_id == $i ? 'slider-active' : ''" );
$a->setAttribute( 'role', 'button' );
$a->setAttribute( 'on', "tap:AMP.setState( { $selected_slide_state_id: $i } )" );
$li->setAttribute( 'option', (string) $i );
$a->appendChild( $this->dom->createTextNode( $i + 1 ) );
$li->appendChild( $a );
$slider_control_nav->appendChild( $li );
}
$amp_selector->appendChild( $slider_control_nav );
$featured_content->appendChild( $amp_selector );
}
/**
* Use AMP-based solutions for toggling search bar in Twenty Fourteen.
*
* @link https://github.com/WordPress/wordpress-develop/blob/fc2a8f0e11316d066a686995b8578d82cd5546cf/src/wp-content/themes/twentyfourteen/js/functions.js#L69-L87
*/
public function add_twentyfourteen_search() {
$search_toggle_div = $this->xpath->query( '//div[ contains( @class, "search-toggle" ) ]' )->item( 0 );
$search_toggle_link = $this->xpath->query( './a', $search_toggle_div )->item( 0 );
$search_container = $this->dom->getElementById( 'search-container' );
if ( ! $search_toggle_div || ! $search_toggle_link || ! $search_container ) {
return;
}
// Create the <amp-state> element that contains whether the search bar is shown.
$amp_state = $this->dom->createElement( 'amp-state' );
$hidden_state_id = 'twentyfourteenSearchHidden';
$hidden = true;
$amp_state->setAttribute( 'id', $hidden_state_id );
$script = $this->dom->createElement( 'script' );
$script->setAttribute( 'type', 'application/json' );
$script->appendChild( $this->dom->createTextNode( wp_json_encode( $hidden ) ) );
$amp_state->appendChild( $script );
$search_container->appendChild( $amp_state );
// Update AMP state to show the search bar and focus on search input when tapping on the search button.
$search_input_id = 'twentyfourteen_search_input';
$search_input_el = $this->xpath->query( './/input[ @name = "s" ]', $search_container )->item( 0 );
$search_toggle_link->removeAttribute( 'href' );
$on = "tap:AMP.setState( { $hidden_state_id: ! $hidden_state_id } )";
if ( $search_input_el ) {
$search_input_el->setAttribute( 'id', $search_input_id );
$on .= ",$search_input_id.focus()";
}
$search_toggle_link->setAttribute( 'on', $on );
$search_toggle_link->setAttribute( 'tabindex', '0' );
$search_toggle_link->setAttribute( 'role', 'button' );
// Set visibility and aria-expanded based of the link based on whether the search bar is expanded.
$search_toggle_link->setAttribute( 'aria-expanded', wp_json_encode( $hidden ) );
$search_toggle_link->setAttribute( AMP_DOM_Utils::AMP_BIND_DATA_ATTR_PREFIX . 'aria-expanded', "$hidden_state_id ? 'false' : 'true'" );
$search_toggle_div->setAttribute( AMP_DOM_Utils::AMP_BIND_DATA_ATTR_PREFIX . 'class', "$hidden_state_id ? 'search-toggle' : 'search-toggle active'" );
$search_container->setAttribute( AMP_DOM_Utils::AMP_BIND_DATA_ATTR_PREFIX . 'class', "$hidden_state_id ? 'search-box-wrapper hide' : 'search-box-wrapper'" );
}
/**
* Wrap a modal node tree in an <amp-lightbox> element.
*
* @param array $args {
* Associative array of arguments.
*
* @type string $modal_id ID to use for the modal and its associated buttons.
* @type string $modal_content_xpath XPath to query the contents of the modal.
* @type string[] $open_button_xpath Array of XPaths to query the buttons that open the modal.
* @type string[] $close_button_xpath Array of XPaths to query the buttons that close the modal. These should be contained within the modal.
* @type string $animate_in Optional. What animation to use for showing the modal. Valid options are: 'fade-in', 'fly-in-bottom', 'fly-in-top'. Defaults to 'fade-in'.
* @type bool $scrollable Optional. Whether the inner content of the modal should be scrollable. Defaults to true.
* }
*/
public function wrap_modal_in_lightbox( $args = [] ) {
if ( ! isset( $args['modal_id'], $args['modal_content_xpath'], $args['open_button_xpath'], $args['close_button_xpath'] ) ) {
return;
}
$modal_id = $args['modal_id'];
$modal_content_node = $this->xpath->query( $args['modal_content_xpath'] )->item( 0 );
if ( ! is_string( $modal_id ) || ! $modal_content_node instanceof DOMElement ) {
return;
}
$body_id = AMP_DOM_Utils::get_element_id( $this->get_body_node(), 'body' );
$open_xpaths = isset( $args['open_button_xpath'] ) ? $args['open_button_xpath'] : [];
$close_xpaths = isset( $args['close_button_xpath'] ) ? $args['close_button_xpath'] : [];
$modal_actions = [
"{$modal_id}.open" => $open_xpaths,
// Although we add the 'show-modal' class here, we don't remove it again, as it will
// _first_ remove the correct positioning and only _then_ start the fade-out animation.
// See: https://youtu.be/aooq-liRtMs .
"{$modal_id}.toggleClass(class=show-modal,force=true)" => $open_xpaths,
"{$body_id}.toggleClass(class=showing-modal,force=true)" => $open_xpaths,
"{$modal_id}.close" => $close_xpaths,
"{$body_id}.toggleClass(class=showing-modal,force=false)" => $close_xpaths,
];
// As we have the toggle targets, we need to go backwards from their and find all
// nodes that are meant to toggle these targets.
// The triple loop below is generally a double loop (modals x toggles), however
// we need the third loop as we cannot guarantee that each xpath will only ever
// retrieve a single result.
foreach ( $modal_actions as $modal_action => $toggle_xpaths ) {
foreach ( $toggle_xpaths as $toggle_xpath ) {
foreach ( $this->xpath->query( $toggle_xpath ) as $toggle_node ) {
if ( $toggle_node instanceof DOMElement ) {
AMP_DOM_Utils::add_amp_action( $toggle_node, 'tap', $modal_action );
}
}
}
}
// Make sure lightboxes are marked as inactive and not expanded when they are closed via the Escape key.
$state_string = str_replace( '-', '_', $modal_id );
AMP_DOM_Utils::add_amp_action( $modal_content_node, 'lightboxOpen', "{$modal_id}.toggleClass(class=active,force=true)" );
AMP_DOM_Utils::add_amp_action( $modal_content_node, 'lightboxOpen', "AMP.setState({{$state_string}:true})" );
AMP_DOM_Utils::add_amp_action( $modal_content_node, 'lightboxClose', "{$modal_id}.toggleClass(class=active,force=false)" );
AMP_DOM_Utils::add_amp_action( $modal_content_node, 'lightboxClose', "AMP.setState({{$state_string}:false})" );
// Create an <amp-lightbox> element that will contain the modal.
$amp_lightbox = $this->dom->createElement( 'amp-lightbox' );
$amp_lightbox->setAttribute( 'id', $modal_id );
$amp_lightbox->setAttribute( 'layout', 'nodisplay' );
$amp_lightbox->setAttribute( 'animate-in', isset( $args['animate_in'] ) ? $args['animate_in'] : 'fade-in' );
$amp_lightbox->setAttribute( 'scrollable', isset( $args['scrollable'] ) ? $args['scrollable'] : true );
$amp_lightbox_inner_content = $this->xpath->query( ".//*[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' modal-inner ' ) ]", $modal_content_node )->item( 0 );
foreach ( [ $amp_lightbox, $amp_lightbox_inner_content ] as $event_element ) {
$event_element->setAttribute( 'role', $this->guess_modal_role( $modal_content_node ) );
// Setting tabindex to -1 (not reachable) as keyboard focus is handled through toggles.
$event_element->setAttribute( 'tabindex', -1 );
}
$parent_node = $modal_content_node->parentNode;
$parent_node->replaceChild( $amp_lightbox, $modal_content_node );
$strip_wrapper_levels = isset( $args['strip_wrapper_levels'] ) ? $args['strip_wrapper_levels'] : 0;
while ( $strip_wrapper_levels > 0 ) {
$children = [];
foreach ( $modal_content_node->childNodes as $child_node ) {
if ( $child_node instanceof DOMElement && ! $child_node instanceof DOMComment ) {
$children[] = $child_node;
}
}
if ( count( $children ) > 1 ) {
break;
}
// Add class(es) and action(s) of removed wrapper to lightbox to avoid breaking CSS selectors.
AMP_DOM_Utils::copy_attributes( [ 'class', 'on', 'data-toggle-target' ], $modal_content_node, $amp_lightbox );
$modal_content_node = $modal_content_node->removeChild( $children[0] );
$strip_wrapper_levels--;
}
$amp_lightbox->appendChild( $modal_content_node );
}
/**
* Add generic modal interactivity compat for the Twentytwenty theme.
*
* Modals implemented in JS will be transformed into <amp-lightbox> equivalents,
* with the tap actions being attached to their associated toggles.
*/
public function add_twentytwenty_modals() {
$modals = $this->xpath->query( "//*[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' cover-modal ' ) ]" );
if ( false === $modals || 0 === $modals->length ) {
return;
}
foreach ( $modals as $modal ) {
/**
* Modal element to transform.
*
* @var DOMElement $modal
*/
if ( ! $modal->hasAttribute( 'data-modal-target-string' ) ) {
return;
}
$modal_target = $modal->getAttribute( 'data-modal-target-string' );
$toggles = $this->xpath->query( "//*[ @data-toggle-target = '{$modal_target}' ]" );
$open_button_xpaths = [];
$close_button_xpaths = [];
foreach ( $toggles as $toggle ) {
/**
* Toggle element to transform.
*
* @var $toggle DOMElement
*/
$within_modal = false;
$parent = $toggle->parentNode;
while ( $parent ) {
if ( $parent === $modal ) {
$within_modal = true;
break;
}
$parent = $parent->parentNode;
}
if ( $within_modal ) {
$close_button_xpaths[] = $toggle->getNodePath();
} else {
$open_button_xpaths[] = $toggle->getNodePath();
}
}
$modal_id = AMP_DOM_Utils::get_element_id( $modal );
// Add the lightbox itself as a close button xpath as well.
// With twentytwenty compat, the lightbox fills the entire screen, and only an inner wrapper will contain
// the actionable elements in the modal. Therefore, the lightbox represents the "background".
$close_button_xpaths[] = "//*[ @id = '{$modal_id}' ]";
// Then, add the inner element of the lightbox as an open button xpath.
// This is done to prevent the above close action from closing the modal when an inner element is clicked.
// Workaround found here: https://stackoverflow.com/a/45971501 .
$open_button_xpaths[] = "//*[ @id = '{$modal_id}' ]//*[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' modal-inner ' ) ]";
$this->wrap_modal_in_lightbox(
[
'modal_id' => $modal_id,
'modal_content_xpath' => $modal->getNodePath(),
'open_button_xpath' => $open_button_xpaths,
'close_button_xpath' => $close_button_xpaths,
'strip_wrapper_levels' => 1,
]
);
}
}
/**
* Add generic toggle interactivity compat for the Twentytwenty theme.
*
* Toggles implemented in JS will be transformed into <amp-bind> equivalents,
* with <amp-state> components storing the CSS classes to set.
*/
public function add_twentytwenty_toggles() {
$toggles = $this->xpath->query( '//*[ @data-toggle-target ]' );
$body_id = AMP_DOM_Utils::get_element_id( $this->get_body_node(), 'body' );
if ( false === $toggles || 0 === $toggles->length ) {
return;
}
foreach ( $toggles as $toggle ) {
/**
* Toggle element to transform.
*
* @var $toggle DOMElement
*/
$toggle_target = $toggle->getAttribute( 'data-toggle-target' );
$toggle_id = AMP_DOM_Utils::get_element_id( $toggle );
if ( 'next' === $toggle_target ) {
$target_node = $toggle->nextSibling;
} else {
$target_xpath = $this->xpath_from_css_selector( $toggle_target );
if ( null === $target_xpath ) {
continue;
}
$target_nodes = $this->xpath->query( $target_xpath, $toggle );
if ( false === $target_nodes || 0 === count( $target_nodes ) ) {
continue;
}
$target_node = $target_nodes->item( 0 );
}
if ( ! $target_node ) {
continue;
}
// Get the class to toggle, if specified.
$toggle_class = $toggle->hasAttribute( 'data-class-to-toggle' ) ? $toggle->getAttribute( 'data-class-to-toggle' ) : 'active';
$is_sub_menu = AMP_DOM_Utils::has_class( $target_node, 'sub-menu' );
$new_target_node = $is_sub_menu ? $this->get_closest_submenu( $toggle ) : $target_node;
$new_target_id = AMP_DOM_Utils::get_element_id( $new_target_node );
$state_string = str_replace( '-', '_', $new_target_id );
// Toggle the target of the clicked toggle.
AMP_DOM_Utils::add_amp_action( $toggle, 'tap', "{$new_target_id}.toggleClass(class='{$toggle_class}')" );
// Set the central state of the toggle's target.
AMP_DOM_Utils::add_amp_action( $toggle, 'tap', "AMP.setState({{$state_string}: !{$state_string}})" );
// Adapt the aria-expanded attribute according to the central state.
$toggle->setAttribute( 'data-amp-bind-aria-expanded', "{$state_string} ? 'true' : 'false'" );
// If the toggle target is 'next' ir a sub-menu, only give the clicked toggle the active class.
if ( 'next' === $toggle_target || AMP_DOM_Utils::has_class( $target_node, 'sub-menu' ) ) {
AMP_DOM_Utils::add_amp_action( $toggle, 'tap', "{$toggle_id}.toggleClass(class='active')" );
} else {
// If not, toggle all toggles with this toggle target.
$target_toggles = $this->xpath->query( "//*[ @data-toggle-target = '{$toggle_target}' ]" );
foreach ( $target_toggles as $target_toggle ) {
if ( AMP_DOM_Utils::has_class( $target_toggle, 'close-nav-toggle' ) ) {
// Skip adding the 'active' class on the "Close" button in the primary nav menu.
continue;
}
$target_toggle_id = AMP_DOM_Utils::get_element_id( $target_toggle );
AMP_DOM_Utils::add_amp_action( $toggle, 'tap', "{$target_toggle_id}.toggleClass(class='active')" );
}
}
// Toggle body class.
if ( $toggle->hasAttribute( 'data-toggle-body-class' ) ) {
$body_class = $toggle->getAttribute( 'data-toggle-body-class' );
AMP_DOM_Utils::add_amp_action( $toggle, 'tap', "{$body_id}.toggleClass(class='{$body_class}')" );
}
if ( $toggle->hasAttribute( 'data-set-focus' ) ) {
$focus_selector = $toggle->getAttribute( 'data-set-focus' );
if ( ! empty( $focus_selector ) ) {
$focus_xpath = $this->xpath_from_css_selector( $focus_selector );
$focus_element = $this->xpath->query( $focus_xpath )->item( 0 );
if ( $focus_element instanceof DOMElement ) {
$focus_element_id = AMP_DOM_Utils::get_element_id( $focus_element );
AMP_DOM_Utils::add_amp_action( $toggle, 'tap', "{$focus_element_id}.focus" );
}
}
}
}
}
/**
* Get the closest sub-menu within a menu item.
*
* @param DOMElement $element Element to get the closest sub-menu of.
* @return DOMElement Requested sub-menu element, or the starting element
* if none found.
*/
protected function get_closest_submenu( DOMElement $element ) {
$menu_item = $element;
while ( ! AMP_DOM_Utils::has_class( $menu_item, 'menu-item' ) ) {
$menu_item = $menu_item->parentNode;
if ( ! $menu_item ) {
return $element;
}
}
$sub_menu = $this->xpath->query( ".//*[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' sub-menu ' ) ]", $menu_item )->item( 0 );
if ( ! $sub_menu instanceof DOMElement ) {
return $element;
}
return $sub_menu;
}
/**
* Automatically open the submenus related to the current page in the menu modal.
*/
public function add_twentytwenty_current_page_awareness() {
$page_ancestors = $this->xpath->query( "//li[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' current_page_ancestor ' ) ]" );
foreach ( $page_ancestors as $page_ancestor ) {
$toggle = $this->xpath->query( "./div/button[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' sub-menu-toggle ' ) ]", $page_ancestor )->item( 0 );
$children = $this->xpath->query( "./ul[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' children ' ) ]", $page_ancestor )->item( 0 );
foreach ( [ $toggle, $children ] as $element ) {
if ( ! $element instanceof DOMElement ) {
continue;
}
$classes = $element->hasAttribute( 'class' ) ? explode( ' ', $element->getAttribute( 'class' ) ) : [];
$classes[] = 'active';
$element->setAttribute( 'class', implode( ' ', array_unique( $classes ) ) );
}
}
}
/**
* Provides a "best guess" as to what XPath would mirror a given CSS
* selector.
*
* This is a very simplistic conversion and will only work for very basic
* CSS selectors.
*
* @param string $css_selector CSS selector to convert.
* @return string|null XPath that closely mirrors the provided CSS selector,
* or null if an error occurred.
* @since 1.4.0
*/
protected function xpath_from_css_selector( $css_selector ) {
// Start with basic clean-up.
$css_selector = trim( $css_selector );
$css_selector = preg_replace( '/\s+/', ' ', $css_selector );
$xpath = '';
$direct_descendant = false;
$token = strtok( $css_selector, ' ' );
while ( false !== $token ) {
$matches = [];
// Direct descendant.
if ( preg_match( '/^>$/', $token, $matches ) ) {
$direct_descendant = true;
$token = strtok( ' ' );
continue;
}
// Single ID.
if ( preg_match( '/^#(?<id>[a-zA-Z0-9-_]*)$/', $token, $matches ) ) {
$descendant = $direct_descendant ? '/' : '//';
$xpath .= "{$descendant}*[ @id = '{$matches['id']}' ]";
$direct_descendant = false;
$token = strtok( ' ' );
continue;
}
// Single class.
if ( preg_match( '/^\.(?<class>[a-zA-Z0-9-_]*)$/', $token, $matches ) ) {
$descendant = $direct_descendant ? '/' : '//';
$xpath .= "{$descendant}*[ @class and contains( concat( ' ', normalize-space( @class ), ' ' ), ' {$matches['class']} ' ) ]";
$direct_descendant = false;
$token = strtok( ' ' );
continue;
}
// Element.
if ( preg_match( '/^(?<element>[^.][a-zA-Z0-9-_]*)$/', $token, $matches ) ) {
$descendant = $direct_descendant ? '/' : '//';
$xpath .= "{$descendant}{$matches['element']}";
$direct_descendant = false;
$token = strtok( ' ' );
continue;
}
$token = strtok( ' ' );
}
return $xpath;
}
/**
* Try to guess the role of a modal based on its classes.
*
* @param DOMElement $modal Modal to guess the role for.
* @return string Role that was guessed.
*/
protected function guess_modal_role( DOMElement $modal ) {
// No classes to base our guess on, so keep it generic.
if ( ! $modal->hasAttribute( 'class' ) ) {
return 'dialog';
}
$classes = $modal->getAttribute( 'class' );
foreach ( [ 'navigation', 'menu', 'search', 'alert', 'figure', 'form', 'img', 'toolbar', 'tooltip' ] as $role ) {
if ( false !== strpos( $classes, $role ) ) {
return $role;
}
}
// None of the roles we are looking for match any of the classes.
return 'dialog';
}
}