WP_Style_Engine_Processor

15#[AllowDynamicProperties]16class WP_Style_Engine_Processor {17 18	/**19	 * A collection of Style Engine Store objects.20	 *21	 * @since 6.1.022	 * @var WP_Style_Engine_CSS_Rules_Store[]23	 */24	protected $stores = array();25 26	/**27	 * The set of CSS rules that this processor will work on.28	 *29	 * @since 6.1.030	 * @var WP_Style_Engine_CSS_Rule[]31	 */32	protected $css_rules = array();33 34	/**35	 * Adds a store to the processor.36	 *37	 * @since 6.1.038	 *39	 * @param WP_Style_Engine_CSS_Rules_Store $store The store to add.40	 * @return WP_Style_Engine_Processor Returns the object to allow chaining methods.41	 */42	public function add_store( $store ) {43		if ( ! $store instanceof WP_Style_Engine_CSS_Rules_Store ) {44			_doing_it_wrong(45				__METHOD__,46				__( '$store must be an instance of WP_Style_Engine_CSS_Rules_Store' ),47				'6.1.0'48			);49			return $this;50		}51 52		$this->stores[ $store->get_name() ] = $store;53 54		return $this;55	}56 57	/**58	 * Adds rules to be processed.59	 *60	 * @since 6.1.061	 * @since 6.6.0 Added support for rules_group.62	 *63	 * @param WP_Style_Engine_CSS_Rule|WP_Style_Engine_CSS_Rule[] $css_rules A single, or an array of,64	 *                                                                       WP_Style_Engine_CSS_Rule objects65	 *                                                                       from a store or otherwise.66	 * @return WP_Style_Engine_Processor Returns the object to allow chaining methods.67	 */68	public function add_rules( $css_rules ) {69		if ( ! is_array( $css_rules ) ) {70			$css_rules = array( $css_rules );71		}72 73		foreach ( $css_rules as $rule ) {74			$selector    = $rule->get_selector();75			$rules_group = $rule->get_rules_group();76 77			/**78			 * If there is a rules_group and it already exists in the css_rules array,79			 * add the rule to it.80			 * Otherwise, create a new entry for the rules_group.81			 */82			if ( ! empty( $rules_group ) ) {83				if ( isset( $this->css_rules[ "$rules_group $selector" ] ) ) {84					$this->css_rules[ "$rules_group $selector" ]->add_declarations( $rule->get_declarations() );85					continue;86				}87				$this->css_rules[ "$rules_group $selector" ] = $rule;88				continue;89			}90 91			// If the selector already exists, add the declarations to it.92			if ( isset( $this->css_rules[ $selector ] ) ) {93				$this->css_rules[ $selector ]->add_declarations( $rule->get_declarations() );94				continue;