WordPress/wp-includes/class-wp-theme-json-resolver.php
gziolo 2f6eb9d25e Blocks: Add support for variations in block.json` file
We integrated variations with block types and the corresponding REST API endpoint in #52688. It's a follow-up patch to add missing support to the `block.json` metadata file when using `register_block_type`.

Some fields for variations are translatable.Therefore, i18n schema was copied over from Gutenberg: https://github.com/WordPress/gutenberg/blob/trunk/packages/blocks/src/api/i18n-block.json. The accompanying implementation was adapted as `translate_settings_using_i18n_schema`.

Props: gwwar, swissspidy, schlessera, jorgefilipecosta.
Fixes #53238.


Built from https://develop.svn.wordpress.org/trunk@51599


git-svn-id: http://core.svn.wordpress.org/trunk@51210 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-08-11 09:08:01 +00:00

237 lines
6.5 KiB
PHP

<?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.
*
* @access private
*/
class WP_Theme_JSON_Resolver {
/**
* Container for data coming from core.
*
* @since 5.8.0
* @var WP_Theme_JSON
*/
private static $core = null;
/**
* Container for data coming from the theme.
*
* @since 5.8.0
* @var WP_Theme_JSON
*/
private static $theme = null;
/**
* Whether or not the theme supports theme.json.
*
* @since 5.8.0
* @var bool
*/
private static $theme_has_support = null;
/**
* Container to keep loaded i18n schema for `theme.json`.
*
* @since 5.9.0
* @var array
*/
private static $i18n_schema = null;
/**
* 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
*
* @param string $file_path Path to file. Empty if no file.
* @return array Contents that adhere to the theme.json schema.
*/
private static function read_json_file( $file_path ) {
$config = array();
if ( $file_path ) {
$decoded_file = wp_json_file_decode( $file_path, array( 'associative' => true ) );
if ( is_array( $decoded_file ) ) {
$config = $decoded_file;
}
}
return $config;
}
/**
* 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.
*/
private static function translate( $theme_json, $domain = 'default' ) {
if ( null === self::$i18n_schema ) {
$i18n_schema = wp_json_file_decode( __DIR__ . '/theme-i18n.json' );
self::$i18n_schema = null === $i18n_schema ? array() : $i18n_schema;
}
return translate_settings_using_i18n_schema( self::$i18n_schema, $theme_json, $domain );
}
/**
* Return core's origin config.
*
* @since 5.8.0
*
* @return WP_Theme_JSON Entity that holds core data.
*/
public static function get_core_data() {
if ( null !== self::$core ) {
return self::$core;
}
$config = self::read_json_file( __DIR__ . '/theme.json' );
$config = self::translate( $config );
self::$core = new WP_Theme_JSON( $config, 'core' );
return self::$core;
}
/**
* Returns the theme's data.
*
* Data from theme.json can be augmented via the $theme_support_data variable.
* This is useful, for example, to backfill the gaps in theme.json that a theme
* has declared via add_theme_supports.
*
* Note that if the same data is present in theme.json and in $theme_support_data,
* the theme.json's is not overwritten.
*
* @since 5.8.0
*
* @param array $theme_support_data Optional. Theme support data in theme.json format.
* Default empty array.
* @return WP_Theme_JSON Entity that holds theme data.
*/
public static function get_theme_data( $theme_support_data = array() ) {
if ( null === self::$theme ) {
$theme_json_data = self::read_json_file( self::get_file_path_from_theme( 'theme.json' ) );
$theme_json_data = self::translate( $theme_json_data, wp_get_theme()->get( 'TextDomain' ) );
self::$theme = new WP_Theme_JSON( $theme_json_data );
}
if ( empty( $theme_support_data ) ) {
return self::$theme;
}
/*
* We want the presets and settings declared in theme.json
* to override the ones declared via add_theme_support.
*/
$with_theme_supports = new WP_Theme_JSON( $theme_support_data );
$with_theme_supports->merge( self::$theme );
return $with_theme_supports;
}
/**
* There are different sources of data for a site: core and theme.
*
* While the getters {@link get_core_data}, {@link get_theme_data} return the raw data
* from the respective origins, this method merges them all together.
*
* If the same piece of data is declared in different origins (core and theme),
* the last origin overrides the previous. For example, if core disables custom colors
* but a theme enables them, the theme config wins.
*
* @since 5.8.0
*
* @param array $settings Optional. Existing block editor settings. Default empty array.
* @return WP_Theme_JSON
*/
public static function get_merged_data( $settings = array() ) {
$theme_support_data = WP_Theme_JSON::get_from_editor_settings( $settings );
$result = new WP_Theme_JSON();
$result->merge( self::get_core_data() );
$result->merge( self::get_theme_data( $theme_support_data ) );
return $result;
}
/**
* Whether the current theme has a theme.json file.
*
* @since 5.8.0
*
* @return bool
*/
public static function theme_has_support() {
if ( ! isset( self::$theme_has_support ) ) {
self::$theme_has_support = (bool) self::get_file_path_from_theme( 'theme.json' );
}
return self::$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
*
* @param string $file_name Name of the file.
* @return string The whole file path or empty if the file doesn't exist.
*/
private static function get_file_path_from_theme( $file_name ) {
/*
* This used to be a locate_template call. However, that method proved problematic
* due to its use of constants (STYLESHEETPATH) that threw errors in some scenarios.
*
* When the theme.json merge algorithm properly supports child themes,
* this should also fall back to the template path, as locate_template did.
*/
$located = '';
$candidate = get_stylesheet_directory() . '/' . $file_name;
if ( is_readable( $candidate ) ) {
$located = $candidate;
}
return $located;
}
/**
* Cleans the cached data so it can be recalculated.
*
* @since 5.8.0
*/
public static function clean_cached_data() {
self::$core = null;
self::$theme = null;
self::$theme_has_support = null;
}
}