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<?php
/**
* WP_Theme_JSON_Resolver class
*
* @package WordPress
* @subpackage Theme
* @since 5.8.0
*/
/**
* Class that abstracts the processing of the different data sources
* for site-level config and offers an API to work with them.
*
* This class is for internal core usage and is not supposed to be used by extenders (plugins and/or themes).
* This is a low-level API that may need to do breaking changes. Please,
* use get_global_settings, get_global_styles, and get_global_stylesheet instead.
*
* @access private
*/
#[AllowDynamicProperties]
class WP_Theme_JSON_Resolver {
/**
* Container for keep track of registered blocks.
*
* @since 6.1.0
* @var array
*/
protected static $blocks_cache = array(
'core' => array(),
'blocks' => array(),
'theme' => array(),
'user' => array(),
);
/**
* Container for data coming from core.
*
* @since 5.8.0
* @var WP_Theme_JSON
*/
protected static $core = null;
/**
* Container for data coming from the blocks.
*
* @since 6.1.0
* @var WP_Theme_JSON
*/
protected static $blocks = null;
/**
* Container for data coming from the theme.
*
* @since 5.8.0
* @var WP_Theme_JSON
*/
protected static $theme = null;
/**
* Whether or not the theme supports theme.json.
*
* @since 5.8.0
* @var bool
*/
protected static $theme_has_support = null;
/**
* Container for data coming from the user.
*
* @since 5.9.0
* @var WP_Theme_JSON
*/
protected static $user = null;
/**
* Stores the ID of the custom post type
* that holds the user data.
*
* @since 5.9.0
* @var int
*/
protected static $user_custom_post_type_id = null;
/**
* Container to keep loaded i18n schema for `theme.json`.
*
* @since 5.8.0 As `$theme_json_i18n`.
* @since 5.9.0 Renamed from `$theme_json_i18n` to `$i18n_schema`.
* @var array
*/
protected static $i18n_schema = null;
/**
* `theme.json` file cache.
*
* @since 6.1.0
* @var array
*/
protected static $theme_json_file_cache = array();
/**
* Processes a file that adheres to the theme.json schema
* and returns an array with its contents, or a void array if none found.
*
* @since 5.8.0
* @since 6.1.0 Added caching.
*
* @param string $file_path Path to file. Empty if no file.
* @return array Contents that adhere to the theme.json schema.
*/
protected static function read_json_file( $file_path ) {
if ( $file_path ) {
if ( array_key_exists( $file_path, static::$theme_json_file_cache ) ) {
return static::$theme_json_file_cache[ $file_path ];
}
$decoded_file = wp_json_file_decode( $file_path, array( 'associative' => true ) );
if ( is_array( $decoded_file ) ) {
static::$theme_json_file_cache[ $file_path ] = $decoded_file;
return static::$theme_json_file_cache[ $file_path ];
}
}
return array();
}
/**
* Returns a data structure used in theme.json translation.
*
* @since 5.8.0
* @deprecated 5.9.0
*
* @return array An array of theme.json fields that are translatable and the keys that are translatable.
*/
public static function get_fields_to_translate() {
_deprecated_function( __METHOD__, '5.9.0' );
return array();
}
/**
* Given a theme.json structure modifies it in place to update certain values
* by its translated strings according to the language set by the user.
*
* @since 5.8.0
*
* @param array $theme_json The theme.json to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return array Returns the modified $theme_json_structure.
*/
protected static function translate( $theme_json, $domain = 'default' ) {
if ( null === static::$i18n_schema ) {
$i18n_schema = wp_json_file_decode( __DIR__ . '/theme-i18n.json' );
static::$i18n_schema = null === $i18n_schema ? array() : $i18n_schema;
}
return translate_settings_using_i18n_schema( static::$i18n_schema, $theme_json, $domain );
}
/**
* Returns core's origin config.
*
* @since 5.8.0
*
* @return WP_Theme_JSON Entity that holds core data.
*/
public static function get_core_data() {
if ( null !== static::$core && static::has_same_registered_blocks( 'core' ) ) {
return static::$core;
}
$config = static::read_json_file( __DIR__ . '/theme.json' );
$config = static::translate( $config );
/**
* Filters the default data provided by WordPress for global styles & settings.
*
* @since 6.1.0
*
* @param WP_Theme_JSON_Data Class to access and update the underlying data.
*/
$theme_json = apply_filters( 'wp_theme_json_data_default', new WP_Theme_JSON_Data( $config, 'default' ) );
$config = $theme_json->get_data();
static::$core = new WP_Theme_JSON( $config, 'default' );
return static::$core;
}
/**
* Checks whether the registered blocks were already processed for this origin.
*
* @since 6.1.0
*
* @param string $origin Data source for which to cache the blocks.
* Valid values are 'core', 'blocks', 'theme', and 'user'.
* @return bool True on success, false otherwise.
*/
protected static function has_same_registered_blocks( $origin ) {
// Bail out if the origin is invalid.
if ( ! isset( static::$blocks_cache[ $origin ] ) ) {
return false;
}
$registry = WP_Block_Type_Registry::get_instance();
$blocks = $registry->get_all_registered();
// Is there metadata for all currently registered blocks?
$block_diff = array_diff_key( $blocks, static::$blocks_cache[ $origin ] );
if ( empty( $block_diff ) ) {
return true;
}
foreach ( $blocks as $block_name => $block_type ) {
static::$blocks_cache[ $origin ][ $block_name ] = true;
}
return false;
}
/**
* Returns the theme's data.
*
* Data from theme.json will be backfilled from existing
* theme supports, if any. Note that if the same data
* is present in theme.json and in theme supports,
* the theme.json takes precedence.
*
* @since 5.8.0
* @since 5.9.0 Theme supports have been inlined and the `$theme_support_data` argument removed.
* @since 6.0.0 Added an `$options` parameter to allow the theme data to be returned without theme supports.
*
* @param array $deprecated Deprecated. Not used.
* @param array $options {
* Options arguments.
*
* @type bool $with_supports Whether to include theme supports in the data. Default true.
* }
* @return WP_Theme_JSON Entity that holds theme data.
*/
public static function get_theme_data( $deprecated = array(), $options = array() ) {
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __METHOD__, '5.9.0' );
}
$options = wp_parse_args( $options, array( 'with_supports' => true ) );
if ( null === static::$theme || ! static::has_same_registered_blocks( 'theme' ) ) {
$theme_json_data = static::read_json_file( static::get_file_path_from_theme( 'theme.json' ) );
$theme_json_data = static::translate( $theme_json_data, wp_get_theme()->get( 'TextDomain' ) );
/**
* Filters the data provided by the theme for global styles and settings.
*
* @since 6.1.0
*
* @param WP_Theme_JSON_Data Class to access and update the underlying data.
*/
$theme_json = apply_filters( 'wp_theme_json_data_theme', new WP_Theme_JSON_Data( $theme_json_data, 'theme' ) );
$theme_json_data = $theme_json->get_data();
static::$theme = new WP_Theme_JSON( $theme_json_data );
}
if ( wp_get_theme()->parent() ) {
// Get parent theme.json.
$parent_theme_json_data = static::read_json_file( static::get_file_path_from_theme( 'theme.json', true ) );
$parent_theme_json_data = static::translate( $parent_theme_json_data, wp_get_theme()->parent()->get( 'TextDomain' ) );
$parent_theme = new WP_Theme_JSON( $parent_theme_json_data );
/*
* Merge the child theme.json into the parent theme.json.
* The child theme takes precedence over the parent.
*/
$parent_theme->merge( static::$theme );
static::$theme = $parent_theme;
}
if ( ! $options['with_supports'] ) {
return static::$theme;
}
/*
* We want the presets and settings declared in theme.json
* to override the ones declared via theme supports.
* So we take theme supports, transform it to theme.json shape
* and merge the static::$theme upon that.
*/
$theme_support_data = WP_Theme_JSON::get_from_editor_settings( get_default_block_editor_settings() );
if ( ! static::theme_has_support() ) {
if ( ! isset( $theme_support_data['settings']['color'] ) ) {
$theme_support_data['settings']['color'] = array();
}
$default_palette = false;
if ( current_theme_supports( 'default-color-palette' ) ) {
$default_palette = true;
}
if ( ! isset( $theme_support_data['settings']['color']['palette'] ) ) {
// If the theme does not have any palette, we still want to show the core one.
$default_palette = true;
}
$theme_support_data['settings']['color']['defaultPalette'] = $default_palette;
$default_gradients = false;
if ( current_theme_supports( 'default-gradient-presets' ) ) {
$default_gradients = true;
}
if ( ! isset( $theme_support_data['settings']['color']['gradients'] ) ) {
// If the theme does not have any gradients, we still want to show the core ones.
$default_gradients = true;
}
$theme_support_data['settings']['color']['defaultGradients'] = $default_gradients;
// Classic themes without a theme.json don't support global duotone.
$theme_support_data['settings']['color']['defaultDuotone'] = false;
}
$with_theme_supports = new WP_Theme_JSON( $theme_support_data );
$with_theme_supports->merge( static::$theme );
return $with_theme_supports;
}
/**
* Gets the styles for blocks from the block.json file.
*
* @since 6.1.0
*
* @return WP_Theme_JSON
*/
public static function get_block_data() {
$registry = WP_Block_Type_Registry::get_instance();
$blocks = $registry->get_all_registered();
if ( null !== static::$blocks && static::has_same_registered_blocks( 'blocks' ) ) {
return static::$blocks;
}
$config = array( 'version' => 2 );
foreach ( $blocks as $block_name => $block_type ) {
if ( isset( $block_type->supports['__experimentalStyle'] ) ) {
$config['styles']['blocks'][ $block_name ] = static::remove_json_comments( $block_type->supports['__experimentalStyle'] );
}
if (
isset( $block_type->supports['spacing']['blockGap']['__experimentalDefault'] ) &&
null === _wp_array_get( $config, array( 'styles', 'blocks', $block_name, 'spacing', 'blockGap' ), null )
) {
// Ensure an empty placeholder value exists for the block, if it provides a default blockGap value.
// The real blockGap value to be used will be determined when the styles are rendered for output.
$config['styles']['blocks'][ $block_name ]['spacing']['blockGap'] = null;
}
}
/**
* Filters the data provided by the blocks for global styles & settings.
*
* @since 6.1.0
*
* @param WP_Theme_JSON_Data Class to access and update the underlying data.
*/
$theme_json = apply_filters( 'wp_theme_json_data_blocks', new WP_Theme_JSON_Data( $config, 'blocks' ) );
$config = $theme_json->get_data();
static::$blocks = new WP_Theme_JSON( $config, 'blocks' );
return static::$blocks;
}
/**
* When given an array, this will remove any keys with the name `//`.
*
* @param array $array The array to filter.
* @return array The filtered array.
*/
private static function remove_json_comments( $array ) {
unset( $array['//'] );
foreach ( $array as $k => $v ) {
if ( is_array( $v ) ) {
$array[ $k ] = static::remove_json_comments( $v );
}
}
return $array;
}
/**
* Returns the custom post type that contains the user's origin config
* for the active theme or a void array if none are found.
*
* This can also create and return a new draft custom post type.
*
* @since 5.9.0
*
* @param WP_Theme $theme The theme object. If empty, it
* defaults to the active theme.
* @param bool $create_post Optional. Whether a new custom post
* type should be created if none are
* found. Default false.
* @param array $post_status_filter Optional. Filter custom post type by
* post status. Default `array( 'publish' )`,
* so it only fetches published posts.
* @return array Custom Post Type for the user's origin config.
*/
public static function get_user_data_from_wp_global_styles( $theme, $create_post = false, $post_status_filter = array( 'publish' ) ) {
if ( ! $theme instanceof WP_Theme ) {
$theme = wp_get_theme();
}
$user_cpt = array();
$post_type_filter = 'wp_global_styles';
$stylesheet = $theme->get_stylesheet();
$args = array(
'posts_per_page' => 1,
'orderby' => 'post_date',
'order' => 'desc',
'post_type' => $post_type_filter,
'post_status' => $post_status_filter,
'ignore_sticky_posts' => true,
'no_found_rows' => true,
'tax_query' => array(
array(
'taxonomy' => 'wp_theme',
'field' => 'name',
'terms' => $stylesheet,
),
),
);
$cache_key = sprintf( 'wp_global_styles_%s', md5( serialize( $args ) ) );
$post_id = (int) get_transient( $cache_key );
// Special case: '-1' is a results not found.
if ( -1 === $post_id && ! $create_post ) {
return $user_cpt;
}
if ( $post_id > 0 && in_array( get_post_status( $post_id ), (array) $post_status_filter, true ) ) {
return get_post( $post_id, ARRAY_A );
}
$global_style_query = new WP_Query();
$recent_posts = $global_style_query->query( $args );
if ( count( $recent_posts ) === 1 ) {
$user_cpt = get_post( $recent_posts[0], ARRAY_A );
} elseif ( $create_post ) {
$cpt_post_id = wp_insert_post(
array(
'post_content' => '{"version": ' . WP_Theme_JSON::LATEST_SCHEMA . ', "isGlobalStylesUserThemeJSON": true }',
'post_status' => 'publish',
'post_title' => 'Custom Styles', // Do not make string translatable, see https://core.trac.wordpress.org/ticket/54518.
'post_type' => $post_type_filter,
'post_name' => sprintf( 'wp-global-styles-%s', urlencode( $stylesheet ) ),
'tax_input' => array(
'wp_theme' => array( $stylesheet ),
),
),
true
);
if ( ! is_wp_error( $cpt_post_id ) ) {
$user_cpt = get_post( $cpt_post_id, ARRAY_A );
}
}
$cache_expiration = $user_cpt ? DAY_IN_SECONDS : HOUR_IN_SECONDS;
set_transient( $cache_key, $user_cpt ? $user_cpt['ID'] : -1, $cache_expiration );
return $user_cpt;
}
/**
* Returns the user's origin config.
*
* @since 5.9.0
*
* @return WP_Theme_JSON Entity that holds styles for user data.
*/
public static function get_user_data() {
if ( null !== static::$user && static::has_same_registered_blocks( 'user' ) ) {
return static::$user;
}
$config = array();
$user_cpt = static::get_user_data_from_wp_global_styles( wp_get_theme() );
if ( array_key_exists( 'post_content', $user_cpt ) ) {
$decoded_data = json_decode( $user_cpt['post_content'], true );
$json_decoding_error = json_last_error();
if ( JSON_ERROR_NONE !== $json_decoding_error ) {
trigger_error( 'Error when decoding a theme.json schema for user data. ' . json_last_error_msg() );
/**
* Filters the data provided by the user for global styles & settings.
*
* @since 6.1.0
*
* @param WP_Theme_JSON_Data Class to access and update the underlying data.
*/
$theme_json = apply_filters( 'wp_theme_json_data_user', new WP_Theme_JSON_Data( $config, 'custom' ) );
$config = $theme_json->get_data();
return new WP_Theme_JSON( $config, 'custom' );
}
// Very important to verify that the flag isGlobalStylesUserThemeJSON is true.
// If it's not true then the content was not escaped and is not safe.
if (
is_array( $decoded_data ) &&
isset( $decoded_data['isGlobalStylesUserThemeJSON'] ) &&
$decoded_data['isGlobalStylesUserThemeJSON']
) {
unset( $decoded_data['isGlobalStylesUserThemeJSON'] );
$config = $decoded_data;
}
}
/** This filter is documented in wp-includes/class-wp-theme-json-resolver.php */
$theme_json = apply_filters( 'wp_theme_json_data_user', new WP_Theme_JSON_Data( $config, 'custom' ) );
$config = $theme_json->get_data();
static::$user = new WP_Theme_JSON( $config, 'custom' );
return static::$user;
}
/**
* Returns the data merged from multiple origins.
*
* There are three sources of data (origins) for a site:
* default, theme, and custom. The custom's has higher priority
* than the theme's, and the theme's higher than default's.
*
* Unlike the getters
* {@link https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/get_core_data/ get_core_data},
* {@link https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/get_theme_data/ get_theme_data},
* and {@link https://developer.wordpress.org/reference/classes/wp_theme_json_resolver/get_user_data/ get_user_data},
* this method returns data after it has been merged with the previous origins.
* This means that if the same piece of data is declared in different origins
* (user, theme, and core), the last origin overrides the previous.
*
* For example, if the user has set a background color
* for the paragraph block, and the theme has done it as well,
* the user preference wins.
*
* @since 5.8.0
* @since 5.9.0 Added user data, removed the `$settings` parameter,
* added the `$origin` parameter.
* @since 6.1.0 Added block data and generation of spacingSizes array.
*
* @param string $origin Optional. To what level should we merge data.
* Valid values are 'theme' or 'custom'. Default 'custom'.
* @return WP_Theme_JSON
*/
public static function get_merged_data( $origin = 'custom' ) {
if ( is_array( $origin ) ) {
_deprecated_argument( __FUNCTION__, '5.9.0' );
}
$result = static::get_core_data();
$result->merge( static::get_block_data() );
$result->merge( static::get_theme_data() );
if ( 'custom' === $origin ) {
$result->merge( static::get_user_data() );
}
// Generate the default spacingSizes array based on the merged spacingScale settings.
$result->set_spacing_sizes();
return $result;
}
/**
* Returns the ID of the custom post type
* that stores user data.
*
* @since 5.9.0
*
* @return integer|null
*/
public static function get_user_global_styles_post_id() {
if ( null !== static::$user_custom_post_type_id ) {
return static::$user_custom_post_type_id;
}
$user_cpt = static::get_user_data_from_wp_global_styles( wp_get_theme(), true );
if ( array_key_exists( 'ID', $user_cpt ) ) {
static::$user_custom_post_type_id = $user_cpt['ID'];
}
return static::$user_custom_post_type_id;
}
/**
* Determines whether the active theme has a theme.json file.
*
* @since 5.8.0
* @since 5.9.0 Added a check in the parent theme.
*
* @return bool
*/
public static function theme_has_support() {
if ( ! isset( static::$theme_has_support ) ) {
static::$theme_has_support = (
is_readable( static::get_file_path_from_theme( 'theme.json' ) ) ||
is_readable( static::get_file_path_from_theme( 'theme.json', true ) )
);
}
return static::$theme_has_support;
}
/**
* Builds the path to the given file and checks that it is readable.
*
* If it isn't, returns an empty string, otherwise returns the whole file path.
*
* @since 5.8.0
* @since 5.9.0 Adapted to work with child themes, added the `$template` argument.
*
* @param string $file_name Name of the file.
* @param bool $template Optional. Use template theme directory. Default false.
* @return string The whole file path or empty if the file doesn't exist.
*/
protected static function get_file_path_from_theme( $file_name, $template = false ) {
$path = $template ? get_template_directory() : get_stylesheet_directory();
$candidate = $path . '/' . $file_name;
return is_readable( $candidate ) ? $candidate : '';
}
/**
* Cleans the cached data so it can be recalculated.
*
* @since 5.8.0
* @since 5.9.0 Added the `$user`, `$user_custom_post_type_id`,
* and `$i18n_schema` variables to reset.
* @since 6.1.0 Added the `$blocks` and `$blocks_cache` variables
* to reset.
*/
public static function clean_cached_data() {
static::$core = null;
static::$blocks = null;
static::$blocks_cache = array(
'core' => array(),
'blocks' => array(),
'theme' => array(),
'user' => array(),
);
static::$theme = null;
static::$user = null;
static::$user_custom_post_type_id = null;
static::$theme_has_support = null;
static::$i18n_schema = null;
}
/**
* Returns the style variations defined by the theme.
*
* @since 6.0.0
*
* @return array
*/
public static function get_style_variations() {
$variations = array();
$base_directory = get_stylesheet_directory() . '/styles';
if ( is_dir( $base_directory ) ) {
$nested_files = new RecursiveIteratorIterator( new RecursiveDirectoryIterator( $base_directory ) );
$nested_html_files = iterator_to_array( new RegexIterator( $nested_files, '/^.+\.json$/i', RecursiveRegexIterator::GET_MATCH ) );
ksort( $nested_html_files );
foreach ( $nested_html_files as $path => $file ) {
$decoded_file = wp_json_file_decode( $path, array( 'associative' => true ) );
if ( is_array( $decoded_file ) ) {
$translated = static::translate( $decoded_file, wp_get_theme()->get( 'TextDomain' ) );
$variation = ( new WP_Theme_JSON( $translated ) )->get_raw_data();
if ( empty( $variation['title'] ) ) {
$variation['title'] = basename( $path, '.json' );
}
$variations[] = $variation;
}
}
}
return $variations;
}
}
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