WP_Interactivity_API

15final class WP_Interactivity_API {16	/**17	 * Holds the mapping of directive attribute names to their processor methods.18	 *19	 * @since 6.5.020	 * @var array21	 */22	private static $directive_processors = array(23		'data-wp-interactive'   => 'data_wp_interactive_processor',24		'data-wp-router-region' => 'data_wp_router_region_processor',25		'data-wp-context'       => 'data_wp_context_processor',26		'data-wp-bind'          => 'data_wp_bind_processor',27		'data-wp-class'         => 'data_wp_class_processor',28		'data-wp-style'         => 'data_wp_style_processor',29		'data-wp-text'          => 'data_wp_text_processor',30		/*31		 * `data-wp-each` needs to be processed in the last place because it moves32		 * the cursor to the end of the processed items to prevent them to be33		 * processed twice.34		 */35		'data-wp-each'          => 'data_wp_each_processor',36	);37 38	/**39	 * Holds the initial state of the different Interactivity API stores.40	 *41	 * This state is used during the server directive processing. Then, it is42	 * serialized and sent to the client as part of the interactivity data to be43	 * recovered during the hydration of the client interactivity stores.44	 *45	 * @since 6.5.046	 * @var array47	 */48	private $state_data = array();49 50	/**51	 * Holds the configuration required by the different Interactivity API stores.52	 *53	 * This configuration is serialized and sent to the client as part of the54	 * interactivity data and can be accessed by the client interactivity stores.55	 *56	 * @since 6.5.057	 * @var array58	 */59	private $config_data = array();60 61	/**62	 * Flag that indicates whether the `data-wp-router-region` directive has63	 * been found in the HTML and processed.64	 *65	 * The value is saved in a private property of the WP_Interactivity_API66	 * instance instead of using a static variable inside the processor67	 * function, which would hold the same value for all instances68	 * independently of whether they have processed any69	 * `data-wp-router-region` directive or not.70	 *71	 * @since 6.5.072	 * @var bool73	 */74	private $has_processed_router_region = false;75 76	/**77	 * Stack of namespaces defined by `data-wp-interactive` directives, in78	 * the order they are processed.79	 *80	 * This is only available during directive processing, otherwise it is `null`.81	 *82	 * @since 6.6.083	 * @var array<string>|null84	 */85	private $namespace_stack = null;86 87	/**88	 * Stack of contexts defined by `data-wp-context` directives, in89	 * the order they are processed.90	 *91	 * This is only available during directive processing, otherwise it is `null`.92	 *93	 * @since 6.6.094	 * @var array<array<mixed>>|null