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<?php
/**
* APIs to interact with global settings & styles.
*
* @package WordPress
*/
/**
* Gets the settings resulting of merging core, theme, and user data.
*
* @since 5.9.0
*
* @param array $path Path to the specific setting to retrieve. Optional.
* If empty, will return all settings.
* @param array $context {
* Metadata to know where to retrieve the $path from. Optional.
*
* @type string $block_name Which block to retrieve the settings from.
* If empty, it'll return the settings for the global context.
* @type string $origin Which origin to take data from.
* Valid values are 'all' (core, theme, and user) or 'base' (core and theme).
* If empty or unknown, 'all' is used.
* }
* @return array The settings to retrieve.
*/
function wp_get_global_settings( $path = array(), $context = array() ) {
if ( ! empty( $context['block_name'] ) ) {
$new_path = array( 'blocks', $context['block_name'] );
foreach ( $path as $subpath ) {
$new_path[] = $subpath;
}
$path = $new_path;
}
/*
* This is the default value when no origin is provided or when it is 'all'.
*
* The $origin is used as part of the cache key. Changes here need to account
* for clearing the cache appropriately.
*/
$origin = 'custom';
if (
! wp_theme_has_theme_json() ||
( isset( $context['origin'] ) && 'base' === $context['origin'] )
) {
$origin = 'theme';
}
/*
* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
* See `wp_cache_add_non_persistent_groups` in src/wp-includes/load.php and other places.
*
* The rationale for this is to make sure derived data from theme.json
* is always fresh from the potential modifications done via hooks
* that can use dynamic data (modify the stylesheet depending on some option,
* settings depending on user permissions, etc.).
* See some of the existing hooks to modify theme.json behaviour:
* https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
*
* A different alternative considered was to invalidate the cache upon certain
* events such as options add/update/delete, user meta, etc.
* It was judged not enough, hence this approach.
* See https://github.com/WordPress/gutenberg/pull/45372
*/
$cache_group = 'theme_json';
$cache_key = 'wp_get_global_settings_' . $origin;
/*
* Ignore cache when `WP_DEBUG` is enabled, so it doesn't interfere with the theme
* developer's workflow.
*
* @todo Replace `WP_DEBUG` once an "in development mode" check is available in Core.
*/
$can_use_cached = ! WP_DEBUG;
$settings = false;
if ( $can_use_cached ) {
$settings = wp_cache_get( $cache_key, $cache_group );
}
if ( false === $settings ) {
$settings = WP_Theme_JSON_Resolver::get_merged_data( $origin )->get_settings();
if ( $can_use_cached ) {
wp_cache_set( $cache_key, $settings, $cache_group );
}
}
return _wp_array_get( $settings, $path, $settings );
}
/**
* Gets the styles resulting of merging core, theme, and user data.
*
* @since 5.9.0
*
* @param array $path Path to the specific style to retrieve. Optional.
* If empty, will return all styles.
* @param array $context {
* Metadata to know where to retrieve the $path from. Optional.
*
* @type string $block_name Which block to retrieve the styles from.
* If empty, it'll return the styles for the global context.
* @type string $origin Which origin to take data from.
* Valid values are 'all' (core, theme, and user) or 'base' (core and theme).
* If empty or unknown, 'all' is used.
* }
* @return array The styles to retrieve.
*/
function wp_get_global_styles( $path = array(), $context = array() ) {
if ( ! empty( $context['block_name'] ) ) {
$path = array_merge( array( 'blocks', $context['block_name'] ), $path );
}
$origin = 'custom';
if ( isset( $context['origin'] ) && 'base' === $context['origin'] ) {
$origin = 'theme';
}
$styles = WP_Theme_JSON_Resolver::get_merged_data( $origin )->get_raw_data()['styles'];
return _wp_array_get( $styles, $path, $styles );
}
/**
* Returns the stylesheet resulting of merging core, theme, and user data.
*
* @since 5.9.0
* @since 6.1.0 Added 'base-layout-styles' support.
*
* @param array $types Optional. Types of styles to load.
* It accepts as values 'variables', 'presets', 'styles', 'base-layout-styles'.
* If empty, it'll load the following:
* - for themes without theme.json: 'variables', 'presets', 'base-layout-styles'.
* - for themes with theme.json: 'variables', 'presets', 'styles'.
* @return string Stylesheet.
*/
function wp_get_global_stylesheet( $types = array() ) {
/*
* Ignore cache when `WP_DEBUG` is enabled, so it doesn't interfere with the theme
* developer's workflow.
*
* @todo Replace `WP_DEBUG` once an "in development mode" check is available in Core.
*/
$can_use_cached = empty( $types ) && ! WP_DEBUG;
/*
* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
* @see `wp_cache_add_non_persistent_groups()`.
*
* The rationale for this is to make sure derived data from theme.json
* is always fresh from the potential modifications done via hooks
* that can use dynamic data (modify the stylesheet depending on some option,
* settings depending on user permissions, etc.).
* See some of the existing hooks to modify theme.json behavior:
* @see https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
*
* A different alternative considered was to invalidate the cache upon certain
* events such as options add/update/delete, user meta, etc.
* It was judged not enough, hence this approach.
* @see https://github.com/WordPress/gutenberg/pull/45372
*/
$cache_group = 'theme_json';
$cache_key = 'wp_get_global_stylesheet';
if ( $can_use_cached ) {
$cached = wp_cache_get( $cache_key, $cache_group );
if ( $cached ) {
return $cached;
}
}
$tree = WP_Theme_JSON_Resolver::get_merged_data();
$supports_theme_json = wp_theme_has_theme_json();
if ( empty( $types ) && ! $supports_theme_json ) {
$types = array( 'variables', 'presets', 'base-layout-styles' );
} elseif ( empty( $types ) ) {
$types = array( 'variables', 'styles', 'presets' );
}
/*
* If variables are part of the stylesheet, then add them.
* This is so themes without a theme.json still work as before 5.9:
* they can override the default presets.
* See https://core.trac.wordpress.org/ticket/54782
*/
$styles_variables = '';
if ( in_array( 'variables', $types, true ) ) {
/*
* Only use the default, theme, and custom origins. Why?
* Because styles for `blocks` origin are added at a later phase
* (i.e. in the render cycle). Here, only the ones in use are rendered.
* @see wp_add_global_styles_for_blocks
*/
$origins = array( 'default', 'theme', 'custom' );
$styles_variables = $tree->get_stylesheet( array( 'variables' ), $origins );
$types = array_diff( $types, array( 'variables' ) );
}
/*
* For the remaining types (presets, styles), we do consider origins:
*
* - themes without theme.json: only the classes for the presets defined by core
* - themes with theme.json: the presets and styles classes, both from core and the theme
*/
$styles_rest = '';
if ( ! empty( $types ) ) {
/*
* Only use the default, theme, and custom origins. Why?
* Because styles for `blocks` origin are added at a later phase
* (i.e. in the render cycle). Here, only the ones in use are rendered.
* @see wp_add_global_styles_for_blocks
*/
$origins = array( 'default', 'theme', 'custom' );
if ( ! $supports_theme_json ) {
$origins = array( 'default' );
}
$styles_rest = $tree->get_stylesheet( $types, $origins );
}
$stylesheet = $styles_variables . $styles_rest;
if ( $can_use_cached ) {
wp_cache_set( $cache_key, $stylesheet, $cache_group );
}
return $stylesheet;
}
/**
* Gets the global styles custom css from theme.json.
*
* @since 6.2.0
*
* @return string Stylesheet.
*/
function wp_get_global_styles_custom_css() {
if ( ! wp_theme_has_theme_json() ) {
return '';
}
/*
* Ignore cache when `WP_DEBUG` is enabled, so it doesn't interfere with the theme
* developer's workflow.
*
* @todo Replace `WP_DEBUG` once an "in development mode" check is available in Core.
*/
$can_use_cached = ! WP_DEBUG;
/*
* By using the 'theme_json' group, this data is marked to be non-persistent across requests.
* @see `wp_cache_add_non_persistent_groups()`.
*
* The rationale for this is to make sure derived data from theme.json
* is always fresh from the potential modifications done via hooks
* that can use dynamic data (modify the stylesheet depending on some option,
* settings depending on user permissions, etc.).
* See some of the existing hooks to modify theme.json behavior:
* @see https://make.wordpress.org/core/2022/10/10/filters-for-theme-json-data/
*
* A different alternative considered was to invalidate the cache upon certain
* events such as options add/update/delete, user meta, etc.
* It was judged not enough, hence this approach.
* @see https://github.com/WordPress/gutenberg/pull/45372
*/
$cache_key = 'wp_get_global_styles_custom_css';
$cache_group = 'theme_json';
if ( $can_use_cached ) {
$cached = wp_cache_get( $cache_key, $cache_group );
if ( $cached ) {
return $cached;
}
}
$tree = WP_Theme_JSON_Resolver::get_merged_data();
$stylesheet = $tree->get_custom_css();
if ( $can_use_cached ) {
wp_cache_set( $cache_key, $stylesheet, $cache_group );
}
return $stylesheet;
}
/**
* Returns a string containing the SVGs to be referenced as filters (duotone).
*
* @since 5.9.1
*
* @return string
*/
function wp_get_global_styles_svg_filters() {
/*
* Ignore cache when `WP_DEBUG` is enabled, so it doesn't interfere with the theme
* developer's workflow.
*
* @todo Replace `WP_DEBUG` once an "in development mode" check is available in Core.
*/
$can_use_cached = ! WP_DEBUG;
$cache_group = 'theme_json';
$cache_key = 'wp_get_global_styles_svg_filters';
if ( $can_use_cached ) {
$cached = wp_cache_get( $cache_key, $cache_group );
if ( $cached ) {
return $cached;
}
}
$supports_theme_json = wp_theme_has_theme_json();
$origins = array( 'default', 'theme', 'custom' );
if ( ! $supports_theme_json ) {
$origins = array( 'default' );
}
$tree = WP_Theme_JSON_Resolver::get_merged_data();
$svgs = $tree->get_svg_filters( $origins );
if ( $can_use_cached ) {
wp_cache_set( $cache_key, $svgs, $cache_group );
}
return $svgs;
}
/**
* Adds global style rules to the inline style for each block.
*
* @since 6.1.0
*/
function wp_add_global_styles_for_blocks() {
$tree = WP_Theme_JSON_Resolver::get_merged_data();
$block_nodes = $tree->get_styles_block_nodes();
foreach ( $block_nodes as $metadata ) {
$block_css = $tree->get_styles_for_block( $metadata );
if ( ! wp_should_load_separate_core_block_assets() ) {
wp_add_inline_style( 'global-styles', $block_css );
continue;
}
$stylesheet_handle = 'global-styles';
if ( isset( $metadata['name'] ) ) {
/*
* These block styles are added on block_render.
* This hooks inline CSS to them so that they are loaded conditionally
* based on whether or not the block is used on the page.
*/
if ( str_starts_with( $metadata['name'], 'core/' ) ) {
$block_name = str_replace( 'core/', '', $metadata['name'] );
$stylesheet_handle = 'wp-block-' . $block_name;
}
wp_add_inline_style( $stylesheet_handle, $block_css );
}
// The likes of block element styles from theme.json do not have $metadata['name'] set.
if ( ! isset( $metadata['name'] ) && ! empty( $metadata['path'] ) ) {
$result = array_values(
array_filter(
$metadata['path'],
function ( $item ) {
if ( strpos( $item, 'core/' ) !== false ) {
return true;
}
return false;
}
)
);
if ( isset( $result[0] ) ) {
if ( str_starts_with( $result[0], 'core/' ) ) {
$block_name = str_replace( 'core/', '', $result[0] );
$stylesheet_handle = 'wp-block-' . $block_name;
}
wp_add_inline_style( $stylesheet_handle, $block_css );
}
}
}
}
/**
* 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 = null;
if (
null !== $theme_has_support &&
/*
* Ignore static cache when `WP_DEBUG` is enabled. Why? To avoid interfering with
* the theme developer's workflow.
*
* @todo Replace `WP_DEBUG` once an "in development mode" check is available in Core.
*/
! WP_DEBUG &&
/*
* Ignore cache when automated test suites are running. Why? To ensure
* the static cache is reset between each test.
*/
! ( defined( 'WP_RUN_CORE_TESTS' ) && WP_RUN_CORE_TESTS )
) {
return $theme_has_support;
}
// Does the theme have its own theme.json?
$theme_has_support = is_readable( get_stylesheet_directory() . '/theme.json' );
// Look up the parent if the child does not have a theme.json.
if ( ! $theme_has_support ) {
$theme_has_support = is_readable( get_template_directory() . '/theme.json' );
}
return $theme_has_support;
}
/**
* 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_Theme_JSON_Resolver::clean_cached_data();
}