372 lines
11 KiB
PHP
372 lines
11 KiB
PHP
<?php
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/**
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* WP_Theme_JSON_Resolver class
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*
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* @package WordPress
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* @subpackage Theme
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* @since 5.8.0
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*/
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/**
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* Class that abstracts the processing of the different data sources
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* for site-level config and offers an API to work with them.
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*
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* @access private
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*/
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class WP_Theme_JSON_Resolver {
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/**
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* Container for data coming from core.
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*
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* @since 5.8.0
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* @var WP_Theme_JSON
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*/
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private static $core = null;
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/**
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* Container for data coming from the theme.
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*
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* @since 5.8.0
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* @var WP_Theme_JSON
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*/
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private static $theme = null;
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/**
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* Whether or not the theme supports theme.json.
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*
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* @since 5.8.0
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* @var bool
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*/
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private static $theme_has_support = null;
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/**
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* Structure to hold i18n metadata.
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*
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* @since 5.8.0
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* @var array
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*/
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private static $theme_json_i18n = null;
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/**
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* Processes a file that adheres to the theme.json schema
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* and returns an array with its contents, or a void array if none found.
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*
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* @since 5.8.0
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*
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* @param string $file_path Path to file. Empty if no file.
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* @return array Contents that adhere to the theme.json schema.
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*/
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private static function read_json_file( $file_path ) {
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$config = array();
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if ( $file_path ) {
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$decoded_file = json_decode(
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file_get_contents( $file_path ),
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true
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);
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$json_decoding_error = json_last_error();
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if ( JSON_ERROR_NONE !== $json_decoding_error ) {
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trigger_error( "Error when decoding a theme.json schema at path $file_path " . json_last_error_msg() );
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return $config;
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}
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if ( is_array( $decoded_file ) ) {
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$config = $decoded_file;
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}
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}
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return $config;
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}
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/**
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* Converts a tree as in i18n-theme.json into a linear array
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* containing metadata to translate a theme.json file.
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*
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* For example, given this input:
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*
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* {
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* "settings": {
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* "*": {
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* "typography": {
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* "fontSizes": [ { "name": "Font size name" } ],
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* "fontStyles": [ { "name": "Font size name" } ]
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* }
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* }
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* }
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* }
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*
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* will return this output:
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*
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* [
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* 0 => [
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* 'path' => [ 'settings', '*', 'typography', 'fontSizes' ],
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* 'key' => 'name',
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* 'context' => 'Font size name'
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* ],
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* 1 => [
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* 'path' => [ 'settings', '*', 'typography', 'fontStyles' ],
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* 'key' => 'name',
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* 'context' => 'Font style name'
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* ]
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* ]
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*
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* @since 5.8.0
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*
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* @param array $i18n_partial A tree that follows the format of i18n-theme.json.
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* @param array $current_path Keeps track of the path as we walk down the given tree.
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* @return array A linear array containing the paths to translate.
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*/
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private static function extract_paths_to_translate( $i18n_partial, $current_path = array() ) {
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$result = array();
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foreach ( $i18n_partial as $property => $partial_child ) {
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if ( is_numeric( $property ) ) {
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foreach ( $partial_child as $key => $context ) {
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return array(
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array(
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'path' => $current_path,
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'key' => $key,
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'context' => $context,
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),
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);
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}
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}
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$result = array_merge(
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$result,
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self::extract_paths_to_translate( $partial_child, array_merge( $current_path, array( $property ) ) )
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);
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}
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return $result;
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}
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/**
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* Returns a data structure used in theme.json translation.
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*
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* @since 5.8.0
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*
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* @return array An array of theme.json fields that are translatable and the keys that are translatable.
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*/
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public static function get_fields_to_translate() {
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if ( null === self::$theme_json_i18n ) {
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$file_structure = self::read_json_file( __DIR__ . '/theme-i18n.json' );
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self::$theme_json_i18n = self::extract_paths_to_translate( $file_structure );
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}
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return self::$theme_json_i18n;
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}
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/**
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* Translates a chunk of the loaded theme.json structure.
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*
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* @since 5.8.0
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*
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* @param array $array_to_translate The chunk of theme.json to translate.
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* @param string $key The key of the field that contains the string to translate.
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* @param string $context The context to apply in the translation call.
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* @param string $domain Text domain. Unique identifier for retrieving translated strings.
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* @return array Returns the modified $theme_json chunk.
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*/
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private static function translate_theme_json_chunk( array $array_to_translate, $key, $context, $domain ) {
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foreach ( $array_to_translate as $item_key => $item_to_translate ) {
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if ( empty( $item_to_translate[ $key ] ) ) {
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continue;
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}
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// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText,WordPress.WP.I18n.NonSingularStringLiteralContext,WordPress.WP.I18n.NonSingularStringLiteralDomain
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$array_to_translate[ $item_key ][ $key ] = translate_with_gettext_context( $array_to_translate[ $item_key ][ $key ], $context, $domain );
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}
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return $array_to_translate;
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}
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/**
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* Given a theme.json structure modifies it in place to update certain values
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* by its translated strings according to the language set by the user.
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*
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* @since 5.8.0
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*
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* @param array $theme_json The theme.json to translate.
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* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
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* Default 'default'.
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* @return array Returns the modified $theme_json_structure.
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*/
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private static function translate( $theme_json, $domain = 'default' ) {
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$fields = self::get_fields_to_translate();
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foreach ( $fields as $field ) {
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$path = $field['path'];
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$key = $field['key'];
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$context = $field['context'];
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/*
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* We need to process the paths that include '*' separately.
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* One example of such a path would be:
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* [ 'settings', 'blocks', '*', 'color', 'palette' ]
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*/
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$nodes_to_iterate = array_keys( $path, '*', true );
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if ( ! empty( $nodes_to_iterate ) ) {
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/*
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* At the moment, we only need to support one '*' in the path, so take it directly.
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* - base will be [ 'settings', 'blocks' ]
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* - data will be [ 'color', 'palette' ]
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*/
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$base_path = array_slice( $path, 0, $nodes_to_iterate[0] );
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$data_path = array_slice( $path, $nodes_to_iterate[0] + 1 );
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$base_tree = _wp_array_get( $theme_json, $base_path, array() );
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foreach ( $base_tree as $node_name => $node_data ) {
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$array_to_translate = _wp_array_get( $node_data, $data_path, null );
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if ( is_null( $array_to_translate ) ) {
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continue;
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}
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// Whole path will be [ 'settings', 'blocks', 'core/paragraph', 'color', 'palette' ].
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$whole_path = array_merge( $base_path, array( $node_name ), $data_path );
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$translated_array = self::translate_theme_json_chunk( $array_to_translate, $key, $context, $domain );
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_wp_array_set( $theme_json, $whole_path, $translated_array );
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}
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} else {
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$array_to_translate = _wp_array_get( $theme_json, $path, null );
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if ( is_null( $array_to_translate ) ) {
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continue;
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}
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$translated_array = self::translate_theme_json_chunk( $array_to_translate, $key, $context, $domain );
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_wp_array_set( $theme_json, $path, $translated_array );
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}
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}
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return $theme_json;
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}
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/**
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* Return core's origin config.
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*
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* @since 5.8.0
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*
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* @return WP_Theme_JSON Entity that holds core data.
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*/
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public static function get_core_data() {
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if ( null !== self::$core ) {
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return self::$core;
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}
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$config = self::read_json_file( __DIR__ . '/theme.json' );
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$config = self::translate( $config );
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self::$core = new WP_Theme_JSON( $config );
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return self::$core;
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}
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/**
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* Returns the theme's data.
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*
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* Data from theme.json can be augmented via the $theme_support_data variable.
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* This is useful, for example, to backfill the gaps in theme.json that a theme
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* has declared via add_theme_supports.
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*
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* Note that if the same data is present in theme.json and in $theme_support_data,
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* the theme.json's is not overwritten.
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*
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* @since 5.8.0
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*
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* @param array $theme_support_data Theme support data in theme.json format.
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* @return WP_Theme_JSON Entity that holds theme data.
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*/
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public static function get_theme_data( $theme_support_data = array() ) {
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if ( null === self::$theme ) {
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$theme_json_data = self::read_json_file( self::get_file_path_from_theme( 'theme.json' ) );
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$theme_json_data = self::translate( $theme_json_data, wp_get_theme()->get( 'TextDomain' ) );
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self::$theme = new WP_Theme_JSON( $theme_json_data );
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}
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if ( empty( $theme_support_data ) ) {
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return self::$theme;
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}
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/*
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* We want the presets and settings declared in theme.json
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* to override the ones declared via add_theme_support.
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*/
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$with_theme_supports = new WP_Theme_JSON( $theme_support_data );
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$with_theme_supports->merge( self::$theme );
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return $with_theme_supports;
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}
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/**
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* There are different sources of data for a site: core and theme.
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*
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* While the getters {@link get_core_data}, {@link get_theme_data} return the raw data
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* from the respective origins, this method merges them all together.
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*
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* If the same piece of data is declared in different origins (core and theme),
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* the last origin overrides the previous. For example, if core disables custom colors
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* but a theme enables them, the theme config wins.
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*
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* @since 5.8.0
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*
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* @param array $settings Existing block editor settings.
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* Empty array by default.
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* @return WP_Theme_JSON
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*/
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public static function get_merged_data( $settings = array() ) {
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$theme_support_data = WP_Theme_JSON::get_from_editor_settings( $settings );
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$result = new WP_Theme_JSON();
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$result->merge( self::get_core_data() );
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$result->merge( self::get_theme_data( $theme_support_data ) );
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return $result;
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}
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/**
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* Whether the current theme has a theme.json file.
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*
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* @return boolean
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*/
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public static function theme_has_support() {
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if ( ! isset( self::$theme_has_support ) ) {
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self::$theme_has_support = (bool) self::get_file_path_from_theme( 'theme.json' );
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}
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return self::$theme_has_support;
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}
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/**
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* Builds the path to the given file and checks that it is readable.
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*
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* If it isn't, returns an empty string, otherwise returns the whole file path.
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*
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* @since 5.8.0
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*
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* @param string $file_name Name of the file.
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* @return string The whole file path or empty if the file doesn't exist.
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*/
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private static function get_file_path_from_theme( $file_name ) {
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/*
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* This used to be a locate_template call. However, that method proved problematic
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* due to its use of constants (STYLESHEETPATH) that threw errors in some scenarios.
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*
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* When the theme.json merge algorithm properly supports child themes,
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* this should also fall back to the template path, as locate_template did.
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*/
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$located = '';
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$candidate = get_stylesheet_directory() . '/' . $file_name;
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if ( is_readable( $candidate ) ) {
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$located = $candidate;
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}
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return $located;
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}
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/**
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* Cleans the cached data so it can be recalculated.
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*
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* @since 5.8.0
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*/
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public static function clean_cached_data() {
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self::$core = null;
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self::$theme = null;
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self::$theme_has_support = null;
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self::$theme_json_i18n = null;
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}
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}
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add_action( 'switch_theme', array( 'WP_Theme_JSON_Resolver', 'clean_cached_data' ) );
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