WP_Theme_JSON::get_property_value( array $styles, array $path, array $theme_json = null ): string|array

Source

protected static function get_property_value( $styles, $path, $theme_json = null ) {
	$value = _wp_array_get( $styles, $path, '' );

	if ( '' === $value || null === $value ) {
		// No need to process the value further.
		return '';
	}

	/*
	 * This converts references to a path to the value at that path
	 * where the value is an array with a "ref" key, pointing to a path.
	 * For example: { "ref": "style.color.background" } => "#fff".
	 * In the case of backgroundImage, if both a ref and a URL are present in the value,
	 * the URL takes precedence and the ref is ignored.
	 */
	if ( is_array( $value ) && isset( $value['ref'] ) ) {
		$value_path = explode( '.', $value['ref'] );
		$ref_value  = _wp_array_get( $theme_json, $value_path );
		// Background Image refs can refer to a string or an array containing a URL string.
		$ref_value_url = $ref_value['url'] ?? null;
		// Only use the ref value if we find anything.
		if ( ! empty( $ref_value ) && ( is_string( $ref_value ) || is_string( $ref_value_url ) ) ) {
			$value = $ref_value;
		}

		if ( is_array( $ref_value ) && isset( $ref_value['ref'] ) ) {
			$path_string      = json_encode( $path );
			$ref_value_string = json_encode( $ref_value );
			_doing_it_wrong(
				'get_property_value',
				sprintf(
					/* translators: 1: theme.json, 2: Value name, 3: Value path, 4: Another value name. */
					__( 'Your %1$s file uses a dynamic value (%2$s) for the path at %3$s. However, the value at %3$s is also a dynamic value (pointing to %4$s) and pointing to another dynamic value is not supported. Please update %3$s to point directly to %4$s.' ),
					'theme.json',
					$ref_value_string,
					$path_string,
					$ref_value['ref']
				),
				'6.1.0'
			);
		}
	}

	if ( is_array( $value ) ) {
		return $value;
	}

	return $value;
}

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