614 lines
21 KiB
PHP
614 lines
21 KiB
PHP
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<?php
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/**
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* APIs to interact with global settings & styles.
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*
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* @package WordPress
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*/
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/**
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* Gets the settings resulting of merging core, theme, and user data.
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*
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* @since 5.9.0
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*
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* @param array $path Path to the specific setting to retrieve. Optional.
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* If empty, will return all settings.
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* @param array $context {
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* Metadata to know where to retrieve the $path from. Optional.
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*
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* @type string $block_name Which block to retrieve the settings from.
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* If empty, it'll return the settings for the global context.
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* @type string $origin Which origin to take data from.
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* Valid values are 'all' (core, theme, and user) or 'base' (core and theme).
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* If empty or unknown, 'all' is used.
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* }
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* @return mixed The settings array or individual setting value to retrieve.
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*/
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function wp_get_global_settings( $path = array(), $context = array() ) {
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if ( ! empty( $context['block_name'] ) ) {
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$new_path = array( 'blocks', $context['block_name'] );
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foreach ( $path as $subpath ) {
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$new_path[] = $subpath;
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}
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$path = $new_path;
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}
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/*
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* This is the default value when no origin is provided or when it is 'all'.
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*
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* The $origin is used as part of the cache key. Changes here need to account
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* for clearing the cache appropriately.
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*/
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$origin = 'custom';
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if (
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! wp_theme_has_theme_json() ||
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( isset( $context['origin'] ) && 'base' === $context['origin'] )
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) {
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$origin = 'theme';
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}
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/*
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* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
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* See `wp_cache_add_non_persistent_groups` in src/wp-includes/load.php and other places.
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*
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* The rationale for this is to make sure derived data from theme.json
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* is always fresh from the potential modifications done via hooks
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* that can use dynamic data (modify the stylesheet depending on some option,
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* settings depending on user permissions, etc.).
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* See some of the existing hooks to modify theme.json behavior:
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* https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
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*
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* A different alternative considered was to invalidate the cache upon certain
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* events such as options add/update/delete, user meta, etc.
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* It was judged not enough, hence this approach.
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* See https://github.com/WordPress/gutenberg/pull/45372
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*/
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$cache_group = 'theme_json';
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$cache_key = 'wp_get_global_settings_' . $origin;
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/*
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* Ignore cache when the development mode is set to 'theme', so it doesn't interfere with the theme
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* developer's workflow.
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*/
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$can_use_cached = ! wp_is_development_mode( 'theme' );
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$settings = false;
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if ( $can_use_cached ) {
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$settings = wp_cache_get( $cache_key, $cache_group );
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}
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if ( false === $settings ) {
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$settings = WP_Theme_JSON_Resolver::get_merged_data( $origin )->get_settings();
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if ( $can_use_cached ) {
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wp_cache_set( $cache_key, $settings, $cache_group );
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}
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}
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return _wp_array_get( $settings, $path, $settings );
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}
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/**
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* Gets the styles resulting of merging core, theme, and user data.
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*
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* @since 5.9.0
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* @since 6.3.0 the internal link format "var:preset|color|secondary" is resolved
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* to "var(--wp--preset--font-size--small)" so consumers don't have to.
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* @since 6.3.0 `transforms` is now usable in the `context` parameter. In case [`transforms`]['resolve_variables']
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* is defined, variables are resolved to their value in the styles.
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*
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* @param array $path Path to the specific style to retrieve. Optional.
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* If empty, will return all styles.
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* @param array $context {
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* Metadata to know where to retrieve the $path from. Optional.
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*
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* @type string $block_name Which block to retrieve the styles from.
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* If empty, it'll return the styles for the global context.
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* @type string $origin Which origin to take data from.
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* Valid values are 'all' (core, theme, and user) or 'base' (core and theme).
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* If empty or unknown, 'all' is used.
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* @type array $transforms Which transformation(s) to apply.
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* Valid value is array( 'resolve-variables' ).
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* If defined, variables are resolved to their value in the styles.
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* }
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* @return mixed The styles array or individual style value to retrieve.
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*/
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function wp_get_global_styles( $path = array(), $context = array() ) {
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if ( ! empty( $context['block_name'] ) ) {
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$path = array_merge( array( 'blocks', $context['block_name'] ), $path );
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}
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$origin = 'custom';
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if ( isset( $context['origin'] ) && 'base' === $context['origin'] ) {
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$origin = 'theme';
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}
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$resolve_variables = isset( $context['transforms'] )
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&& is_array( $context['transforms'] )
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&& in_array( 'resolve-variables', $context['transforms'], true );
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$merged_data = WP_Theme_JSON_Resolver::get_merged_data( $origin );
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if ( $resolve_variables ) {
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$merged_data = WP_Theme_JSON::resolve_variables( $merged_data );
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}
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$styles = $merged_data->get_raw_data()['styles'];
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return _wp_array_get( $styles, $path, $styles );
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}
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/**
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* Returns the stylesheet resulting of merging core, theme, and user data.
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*
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* @since 5.9.0
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* @since 6.1.0 Added 'base-layout-styles' support.
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*
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* @param array $types Optional. Types of styles to load.
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* It accepts as values 'variables', 'presets', 'styles', 'base-layout-styles'.
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* If empty, it'll load the following:
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* - for themes without theme.json: 'variables', 'presets', 'base-layout-styles'.
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* - for themes with theme.json: 'variables', 'presets', 'styles'.
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* @return string Stylesheet.
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*/
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function wp_get_global_stylesheet( $types = array() ) {
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/*
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* Ignore cache when the development mode is set to 'theme', so it doesn't interfere with the theme
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* developer's workflow.
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*/
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$can_use_cached = empty( $types ) && ! wp_is_development_mode( 'theme' );
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/*
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* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
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* @see `wp_cache_add_non_persistent_groups()`.
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*
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* The rationale for this is to make sure derived data from theme.json
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* is always fresh from the potential modifications done via hooks
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* that can use dynamic data (modify the stylesheet depending on some option,
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* settings depending on user permissions, etc.).
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* See some of the existing hooks to modify theme.json behavior:
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* @see https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
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*
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* A different alternative considered was to invalidate the cache upon certain
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* events such as options add/update/delete, user meta, etc.
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* It was judged not enough, hence this approach.
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* @see https://github.com/WordPress/gutenberg/pull/45372
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*/
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$cache_group = 'theme_json';
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$cache_key = 'wp_get_global_stylesheet';
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if ( $can_use_cached ) {
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$cached = wp_cache_get( $cache_key, $cache_group );
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if ( $cached ) {
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return $cached;
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}
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}
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$tree = WP_Theme_JSON_Resolver::get_merged_data();
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$supports_theme_json = wp_theme_has_theme_json();
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if ( empty( $types ) && ! $supports_theme_json ) {
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$types = array( 'variables', 'presets', 'base-layout-styles' );
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} elseif ( empty( $types ) ) {
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$types = array( 'variables', 'styles', 'presets' );
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}
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/*
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* If variables are part of the stylesheet, then add them.
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* This is so themes without a theme.json still work as before 5.9:
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* they can override the default presets.
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* See https://core.trac.wordpress.org/ticket/54782
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*/
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$styles_variables = '';
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if ( in_array( 'variables', $types, true ) ) {
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/*
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* Only use the default, theme, and custom origins. Why?
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* Because styles for `blocks` origin are added at a later phase
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* (i.e. in the render cycle). Here, only the ones in use are rendered.
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* @see wp_add_global_styles_for_blocks
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*/
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$origins = array( 'default', 'theme', 'custom' );
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$styles_variables = $tree->get_stylesheet( array( 'variables' ), $origins );
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$types = array_diff( $types, array( 'variables' ) );
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}
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/*
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* For the remaining types (presets, styles), we do consider origins:
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*
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* - themes without theme.json: only the classes for the presets defined by core
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* - themes with theme.json: the presets and styles classes, both from core and the theme
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*/
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$styles_rest = '';
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if ( ! empty( $types ) ) {
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/*
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* Only use the default, theme, and custom origins. Why?
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* Because styles for `blocks` origin are added at a later phase
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* (i.e. in the render cycle). Here, only the ones in use are rendered.
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* @see wp_add_global_styles_for_blocks
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*/
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$origins = array( 'default', 'theme', 'custom' );
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/*
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* If the theme doesn't have theme.json but supports both appearance tools and color palette,
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* the 'theme' origin should be included so color palette presets are also output.
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*/
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if ( ! $supports_theme_json && ( current_theme_supports( 'appearance-tools' ) || current_theme_supports( 'border' ) ) && current_theme_supports( 'editor-color-palette' ) ) {
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$origins = array( 'default', 'theme' );
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} elseif ( ! $supports_theme_json ) {
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$origins = array( 'default' );
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}
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$styles_rest = $tree->get_stylesheet( $types, $origins );
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}
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$stylesheet = $styles_variables . $styles_rest;
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if ( $can_use_cached ) {
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wp_cache_set( $cache_key, $stylesheet, $cache_group );
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}
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return $stylesheet;
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}
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/**
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* Gets the global styles custom CSS from theme.json.
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*
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* @since 6.2.0
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*
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* @return string The global styles custom CSS.
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*/
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function wp_get_global_styles_custom_css() {
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if ( ! wp_theme_has_theme_json() ) {
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return '';
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}
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/*
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* Ignore cache when the development mode is set to 'theme', so it doesn't interfere with the theme
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* developer's workflow.
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*/
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$can_use_cached = ! wp_is_development_mode( 'theme' );
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/*
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* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
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* @see `wp_cache_add_non_persistent_groups()`.
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*
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* The rationale for this is to make sure derived data from theme.json
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* is always fresh from the potential modifications done via hooks
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* that can use dynamic data (modify the stylesheet depending on some option,
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* settings depending on user permissions, etc.).
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* See some of the existing hooks to modify theme.json behavior:
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* @see https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
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*
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* A different alternative considered was to invalidate the cache upon certain
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* events such as options add/update/delete, user meta, etc.
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* It was judged not enough, hence this approach.
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* @see https://github.com/WordPress/gutenberg/pull/45372
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*/
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$cache_key = 'wp_get_global_styles_custom_css';
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$cache_group = 'theme_json';
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if ( $can_use_cached ) {
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$cached = wp_cache_get( $cache_key, $cache_group );
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if ( $cached ) {
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return $cached;
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}
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}
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$tree = WP_Theme_JSON_Resolver::get_merged_data();
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$stylesheet = $tree->get_custom_css();
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if ( $can_use_cached ) {
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wp_cache_set( $cache_key, $stylesheet, $cache_group );
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}
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return $stylesheet;
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}
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/**
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* Adds global style rules to the inline style for each block.
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*
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* @since 6.1.0
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*
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* @global WP_Styles $wp_styles
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*/
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function wp_add_global_styles_for_blocks() {
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global $wp_styles;
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$tree = WP_Theme_JSON_Resolver::get_merged_data();
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$block_nodes = $tree->get_styles_block_nodes();
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foreach ( $block_nodes as $metadata ) {
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$block_css = $tree->get_styles_for_block( $metadata );
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if ( ! wp_should_load_separate_core_block_assets() ) {
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wp_add_inline_style( 'global-styles', $block_css );
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continue;
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}
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$stylesheet_handle = 'global-styles';
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/*
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* When `wp_should_load_separate_core_block_assets()` is true, block styles are
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* enqueued for each block on the page in class WP_Block's render function.
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* This means there will be a handle in the styles queue for each of those blocks.
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* Block-specific global styles should be attached to the global-styles handle, but
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* only for blocks on the page, thus we check if the block's handle is in the queue
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* before adding the inline style.
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* This conditional loading only applies to core blocks.
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*/
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if ( isset( $metadata['name'] ) ) {
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if ( str_starts_with( $metadata['name'], 'core/' ) ) {
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$block_name = str_replace( 'core/', '', $metadata['name'] );
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$block_handle = 'wp-block-' . $block_name;
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if ( in_array( $block_handle, $wp_styles->queue ) ) {
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wp_add_inline_style( $stylesheet_handle, $block_css );
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}
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} else {
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wp_add_inline_style( $stylesheet_handle, $block_css );
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}
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}
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// The likes of block element styles from theme.json do not have $metadata['name'] set.
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if ( ! isset( $metadata['name'] ) && ! empty( $metadata['path'] ) ) {
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$block_name = wp_get_block_name_from_theme_json_path( $metadata['path'] );
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if ( $block_name ) {
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|
if ( str_starts_with( $block_name, 'core/' ) ) {
|
||
|
|
$block_name = str_replace( 'core/', '', $block_name );
|
||
|
|
$block_handle = 'wp-block-' . $block_name;
|
||
|
|
if ( in_array( $block_handle, $wp_styles->queue ) ) {
|
||
|
|
wp_add_inline_style( $stylesheet_handle, $block_css );
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
wp_add_inline_style( $stylesheet_handle, $block_css );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the block name from a given theme.json path.
|
||
|
|
*
|
||
|
|
* @since 6.3.0
|
||
|
|
* @access private
|
||
|
|
*
|
||
|
|
* @param array $path An array of keys describing the path to a property in theme.json.
|
||
|
|
* @return string Identified block name, or empty string if none found.
|
||
|
|
*/
|
||
|
|
function wp_get_block_name_from_theme_json_path( $path ) {
|
||
|
|
// Block name is expected to be the third item after 'styles' and 'blocks'.
|
||
|
|
if (
|
||
|
|
count( $path ) >= 3
|
||
|
|
&& 'styles' === $path[0]
|
||
|
|
&& 'blocks' === $path[1]
|
||
|
|
&& str_contains( $path[2], '/' )
|
||
|
|
) {
|
||
|
|
return $path[2];
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* As fallback and for backward compatibility, allow any core block to be
|
||
|
|
* at any position.
|
||
|
|
*/
|
||
|
|
$result = array_values(
|
||
|
|
array_filter(
|
||
|
|
$path,
|
||
|
|
static function ( $item ) {
|
||
|
|
if ( str_contains( $item, 'core/' ) ) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
)
|
||
|
|
);
|
||
|
|
if ( isset( $result[0] ) ) {
|
||
|
|
return $result[0];
|
||
|
|
}
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks whether a theme or its parent has a theme.json file.
|
||
|
|
*
|
||
|
|
* @since 6.2.0
|
||
|
|
*
|
||
|
|
* @return bool Returns true if theme or its parent has a theme.json file, false otherwise.
|
||
|
|
*/
|
||
|
|
function wp_theme_has_theme_json() {
|
||
|
|
static $theme_has_support = array();
|
||
|
|
|
||
|
|
$stylesheet = get_stylesheet();
|
||
|
|
|
||
|
|
if (
|
||
|
|
isset( $theme_has_support[ $stylesheet ] ) &&
|
||
|
|
/*
|
||
|
|
* Ignore static cache when the development mode is set to 'theme', to avoid interfering with
|
||
|
|
* the theme developer's workflow.
|
||
|
|
*/
|
||
|
|
! wp_is_development_mode( 'theme' )
|
||
|
|
) {
|
||
|
|
return $theme_has_support[ $stylesheet ];
|
||
|
|
}
|
||
|
|
|
||
|
|
$stylesheet_directory = get_stylesheet_directory();
|
||
|
|
$template_directory = get_template_directory();
|
||
|
|
|
||
|
|
// This is the same as get_theme_file_path(), which isn't available in load-styles.php context
|
||
|
|
if ( $stylesheet_directory !== $template_directory && file_exists( $stylesheet_directory . '/theme.json' ) ) {
|
||
|
|
$path = $stylesheet_directory . '/theme.json';
|
||
|
|
} else {
|
||
|
|
$path = $template_directory . '/theme.json';
|
||
|
|
}
|
||
|
|
|
||
|
|
/** This filter is documented in wp-includes/link-template.php */
|
||
|
|
$path = apply_filters( 'theme_file_path', $path, 'theme.json' );
|
||
|
|
|
||
|
|
$theme_has_support[ $stylesheet ] = file_exists( $path );
|
||
|
|
|
||
|
|
return $theme_has_support[ $stylesheet ];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Cleans the caches under the theme_json group.
|
||
|
|
*
|
||
|
|
* @since 6.2.0
|
||
|
|
*/
|
||
|
|
function wp_clean_theme_json_cache() {
|
||
|
|
wp_cache_delete( 'wp_get_global_stylesheet', 'theme_json' );
|
||
|
|
wp_cache_delete( 'wp_get_global_styles_svg_filters', 'theme_json' );
|
||
|
|
wp_cache_delete( 'wp_get_global_settings_custom', 'theme_json' );
|
||
|
|
wp_cache_delete( 'wp_get_global_settings_theme', 'theme_json' );
|
||
|
|
wp_cache_delete( 'wp_get_global_styles_custom_css', 'theme_json' );
|
||
|
|
wp_cache_delete( 'wp_get_theme_data_template_parts', 'theme_json' );
|
||
|
|
WP_Theme_JSON_Resolver::clean_cached_data();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the current theme's wanted patterns (slugs) to be
|
||
|
|
* registered from Pattern Directory.
|
||
|
|
*
|
||
|
|
* @since 6.3.0
|
||
|
|
*
|
||
|
|
* @return string[]
|
||
|
|
*/
|
||
|
|
function wp_get_theme_directory_pattern_slugs() {
|
||
|
|
return WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_patterns();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the metadata for the custom templates defined by the theme via theme.json.
|
||
|
|
*
|
||
|
|
* @since 6.4.0
|
||
|
|
*
|
||
|
|
* @return array Associative array of `$template_name => $template_data` pairs,
|
||
|
|
* with `$template_data` having "title" and "postTypes" fields.
|
||
|
|
*/
|
||
|
|
function wp_get_theme_data_custom_templates() {
|
||
|
|
return WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_custom_templates();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the metadata for the template parts defined by the theme.
|
||
|
|
*
|
||
|
|
* @since 6.4.0
|
||
|
|
*
|
||
|
|
* @return array Associative array of `$part_name => $part_data` pairs,
|
||
|
|
* with `$part_data` having "title" and "area" fields.
|
||
|
|
*/
|
||
|
|
function wp_get_theme_data_template_parts() {
|
||
|
|
$cache_group = 'theme_json';
|
||
|
|
$cache_key = 'wp_get_theme_data_template_parts';
|
||
|
|
$can_use_cached = ! wp_is_development_mode( 'theme' );
|
||
|
|
|
||
|
|
$metadata = false;
|
||
|
|
if ( $can_use_cached ) {
|
||
|
|
$metadata = wp_cache_get( $cache_key, $cache_group );
|
||
|
|
if ( false !== $metadata ) {
|
||
|
|
return $metadata;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( false === $metadata ) {
|
||
|
|
$metadata = WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_template_parts();
|
||
|
|
if ( $can_use_cached ) {
|
||
|
|
wp_cache_set( $cache_key, $metadata, $cache_group );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return $metadata;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determines the CSS selector for the block type and property provided,
|
||
|
|
* returning it if available.
|
||
|
|
*
|
||
|
|
* @since 6.3.0
|
||
|
|
*
|
||
|
|
* @param WP_Block_Type $block_type The block's type.
|
||
|
|
* @param string|array $target The desired selector's target, `root` or array path.
|
||
|
|
* @param boolean $fallback Whether to fall back to broader selector.
|
||
|
|
*
|
||
|
|
* @return string|null CSS selector or `null` if no selector available.
|
||
|
|
*/
|
||
|
|
function wp_get_block_css_selector( $block_type, $target = 'root', $fallback = false ) {
|
||
|
|
if ( empty( $target ) ) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
$has_selectors = ! empty( $block_type->selectors );
|
||
|
|
|
||
|
|
// Root Selector.
|
||
|
|
|
||
|
|
// Calculated before returning as it can be used as fallback for
|
||
|
|
// feature selectors later on.
|
||
|
|
$root_selector = null;
|
||
|
|
|
||
|
|
if ( $has_selectors && isset( $block_type->selectors['root'] ) ) {
|
||
|
|
// Use the selectors API if available.
|
||
|
|
$root_selector = $block_type->selectors['root'];
|
||
|
|
} elseif ( isset( $block_type->supports['__experimentalSelector'] ) && is_string( $block_type->supports['__experimentalSelector'] ) ) {
|
||
|
|
// Use the old experimental selector supports property if set.
|
||
|
|
$root_selector = $block_type->supports['__experimentalSelector'];
|
||
|
|
} else {
|
||
|
|
// If no root selector found, generate default block class selector.
|
||
|
|
$block_name = str_replace( '/', '-', str_replace( 'core/', '', $block_type->name ) );
|
||
|
|
$root_selector = ".wp-block-{$block_name}";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return selector if it's the root target we are looking for.
|
||
|
|
if ( 'root' === $target ) {
|
||
|
|
return $root_selector;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If target is not `root` we have a feature or subfeature as the target.
|
||
|
|
// If the target is a string convert to an array.
|
||
|
|
if ( is_string( $target ) ) {
|
||
|
|
$target = explode( '.', $target );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Feature Selectors ( May fallback to root selector ).
|
||
|
|
if ( 1 === count( $target ) ) {
|
||
|
|
$fallback_selector = $fallback ? $root_selector : null;
|
||
|
|
|
||
|
|
// Prefer the selectors API if available.
|
||
|
|
if ( $has_selectors ) {
|
||
|
|
// Look for selector under `feature.root`.
|
||
|
|
$path = array( current( $target ), 'root' );
|
||
|
|
$feature_selector = _wp_array_get( $block_type->selectors, $path, null );
|
||
|
|
|
||
|
|
if ( $feature_selector ) {
|
||
|
|
return $feature_selector;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check if feature selector is set via shorthand.
|
||
|
|
$feature_selector = _wp_array_get( $block_type->selectors, $target, null );
|
||
|
|
|
||
|
|
return is_string( $feature_selector ) ? $feature_selector : $fallback_selector;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Try getting old experimental supports selector value.
|
||
|
|
$path = array( current( $target ), '__experimentalSelector' );
|
||
|
|
$feature_selector = _wp_array_get( $block_type->supports, $path, null );
|
||
|
|
|
||
|
|
// Nothing to work with, provide fallback or null.
|
||
|
|
if ( null === $feature_selector ) {
|
||
|
|
return $fallback_selector;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Scope the feature selector by the block's root selector.
|
||
|
|
return WP_Theme_JSON::scope_selector( $root_selector, $feature_selector );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Subfeature selector
|
||
|
|
// This may fallback either to parent feature or root selector.
|
||
|
|
$subfeature_selector = null;
|
||
|
|
|
||
|
|
// Use selectors API if available.
|
||
|
|
if ( $has_selectors ) {
|
||
|
|
$subfeature_selector = _wp_array_get( $block_type->selectors, $target, null );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Only return if we have a subfeature selector.
|
||
|
|
if ( $subfeature_selector ) {
|
||
|
|
return $subfeature_selector;
|
||
|
|
}
|
||
|
|
|
||
|
|
// To this point we don't have a subfeature selector. If a fallback
|
||
|
|
// has been requested, remove subfeature from target path and return
|
||
|
|
// results of a call for the parent feature's selector.
|
||
|
|
if ( $fallback ) {
|
||
|
|
return wp_get_block_css_selector( $block_type, $target[0], $fallback );
|
||
|
|
}
|
||
|
|
|
||
|
|
return null;
|
||
|
|
}
|