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<?php
/**
* WP_Theme_JSON_Schema class
*
* @package WordPress
* @subpackage Theme
* @since 5.9.0
*/
/**
* Class that migrates a given theme.json structure to the latest schema.
*
* 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.
*
* @since 5.9.0
* @access private
*/
#[AllowDynamicProperties]
class WP_Theme_JSON_Schema {
/**
* Maps old properties to their new location within the schema's settings.
* This will be applied at both the defaults and individual block levels.
*/
const V1_TO_V2_RENAMED_PATHS = array(
'border.customRadius' => 'border.radius',
'spacing.customMargin' => 'spacing.margin',
'spacing.customPadding' => 'spacing.padding',
'typography.customLineHeight' => 'typography.lineHeight',
);
/**
* Function that migrates a given theme.json structure to the last version.
*
* @since 5.9.0
* @since 6.6.0 Migrate up to v3 and add $origin parameter.
*
* @param array $theme_json The structure to migrate.
* @param string $origin Optional. What source of data this object represents.
* One of 'blocks', 'default', 'theme', or 'custom'. Default 'theme'.
* @return array The structure in the last version.
*/
public static function migrate( $theme_json, $origin = 'theme' ) {
if ( ! isset( $theme_json['version'] ) ) {
$theme_json = array(
'version' => WP_Theme_JSON::LATEST_SCHEMA,
);
}
// Migrate each version in order starting with the current version.
switch ( $theme_json['version'] ) {
case 1:
$theme_json = self::migrate_v1_to_v2( $theme_json );
// Deliberate fall through. Once migrated to v2, also migrate to v3.
case 2:
$theme_json = self::migrate_v2_to_v3( $theme_json, $origin );
}
return $theme_json;
}
/**
* Removes the custom prefixes for a few properties
* that were part of v1:
*
* 'border.customRadius' => 'border.radius',
* 'spacing.customMargin' => 'spacing.margin',
* 'spacing.customPadding' => 'spacing.padding',
* 'typography.customLineHeight' => 'typography.lineHeight',
*
* @since 5.9.0
*
* @param array $old Data to migrate.
*
* @return array Data without the custom prefixes.
*/
private static function migrate_v1_to_v2( $old ) {
// Copy everything.
$new = $old;
// Overwrite the things that changed.
if ( isset( $old['settings'] ) ) {
$new['settings'] = self::rename_paths( $old['settings'], self::V1_TO_V2_RENAMED_PATHS );
}
// Set the new version.
$new['version'] = 2;
return $new;
}
/**
* Migrates from v2 to v3.
*
* - Sets settings.typography.defaultFontSizes to false if settings.typography.fontSizes are defined.
* - Sets settings.spacing.defaultSpacingSizes to false if settings.spacing.spacingSizes are defined.
* - Prevents settings.spacing.spacingSizes from merging with settings.spacing.spacingScale by
* unsetting spacingScale when spacingSizes are defined.
*
* @since 6.6.0
*
* @param array $old Data to migrate.
* @param string $origin What source of data this object represents.
* One of 'blocks', 'default', 'theme', or 'custom'.
* @return array Data with defaultFontSizes set to false.
*/
private static function migrate_v2_to_v3( $old, $origin ) {
// Copy everything.
$new = $old;
// Set the new version.
$new['version'] = 3;
/*
* Remaining changes do not need to be applied to the custom origin,
* as they should take on the value of the theme origin.
*/
if ( 'custom' === $origin ) {
return $new;
}
/*
* Even though defaultFontSizes and defaultSpacingSizes are new
* settings, we need to migrate them as they each control
* PRESETS_METADATA prevent_override values which were previously
* hardcoded to false. This only needs to happen when the theme provides
* fontSizes or spacingSizes as they could match the default ones and
* affect the generated CSS.
*/
if ( isset( $old['settings']['typography']['fontSizes'] ) ) {
$new['settings']['typography']['defaultFontSizes'] = false;
}
/*
* Similarly to defaultFontSizes, we need to migrate defaultSpacingSizes
* as it controls the PRESETS_METADATA prevent_override which was
* previously hardcoded to false. This only needs to happen when the
* theme provided spacing sizes via spacingSizes or spacingScale.
*/
if (
isset( $old['settings']['spacing']['spacingSizes'] ) ||
isset( $old['settings']['spacing']['spacingScale'] )
) {
$new['settings']['spacing']['defaultSpacingSizes'] = false;
}
/*
* In v3 spacingSizes is merged with the generated spacingScale sizes
* instead of completely replacing them. The v3 behavior is what was
* documented for the v2 schema, but the code never actually did work
* that way. Instead of surprising users with a behavior change two
* years after the fact at the same time as a v3 update is introduced,
* we'll continue using the "bugged" behavior for v2 themes. And treat
* the "bug fix" as a breaking change for v3.
*/
if ( isset( $old['settings']['spacing']['spacingSizes'] ) ) {
unset( $new['settings']['spacing']['spacingScale'] );
}
return $new;
}
/**
* Processes the settings subtree.
*
* @since 5.9.0
*
* @param array $settings Array to process.
* @param array $paths_to_rename Paths to rename.
*
* @return array The settings in the new format.
*/
private static function rename_paths( $settings, $paths_to_rename ) {
$new_settings = $settings;
// Process any renamed/moved paths within default settings.
self::rename_settings( $new_settings, $paths_to_rename );
// Process individual block settings.
if ( isset( $new_settings['blocks'] ) && is_array( $new_settings['blocks'] ) ) {
foreach ( $new_settings['blocks'] as &$block_settings ) {
self::rename_settings( $block_settings, $paths_to_rename );
}
}
return $new_settings;
}
/**
* Processes a settings array, renaming or moving properties.
*
* @since 5.9.0
*
* @param array $settings Reference to settings either defaults or an individual block's.
* @param array $paths_to_rename Paths to rename.
*/
private static function rename_settings( &$settings, $paths_to_rename ) {
foreach ( $paths_to_rename as $original => $renamed ) {
$original_path = explode( '.', $original );
$renamed_path = explode( '.', $renamed );
$current_value = _wp_array_get( $settings, $original_path, null );
if ( null !== $current_value ) {
_wp_array_set( $settings, $renamed_path, $current_value );
self::unset_setting_by_path( $settings, $original_path );
}
}
}
/**
* Removes a property from within the provided settings by its path.
*
* @since 5.9.0
*
* @param array $settings Reference to the current settings array.
* @param array $path Path to the property to be removed.
*/
private static function unset_setting_by_path( &$settings, $path ) {
$tmp_settings = &$settings;
$last_key = array_pop( $path );
foreach ( $path as $key ) {
$tmp_settings = &$tmp_settings[ $key ];
}
unset( $tmp_settings[ $last_key ] );
}
}