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<?php /** * Print data associated with Script Modules in Script tags. * * This embeds data in the page HTML so that it is available on page load. * * Data can be associated with a given Script Module by using the * `script_module_data_{$module_id}` filter. * * The data for a given Script Module will be JSON serialized in a script tag with an ID * like `wp-script-module-data-{$module_id}`. */ function gutenberg_print_script_module_data(): void { $get_marked_for_enqueue = new ReflectionMethod( 'WP_Script_Modules', 'get_marked_for_enqueue' ); $get_marked_for_enqueue->setAccessible( true ); $get_import_map = new ReflectionMethod( 'WP_Script_Modules', 'get_import_map' ); $get_import_map->setAccessible( true ); $modules = array(); foreach ( array_keys( $get_marked_for_enqueue->invoke( wp_script_modules() ) ) as $id ) { $modules[ $id ] = true; } foreach ( array_keys( $get_import_map->invoke( wp_script_modules() )['imports'] ) as $id ) { $modules[ $id ] = true; } foreach ( array_keys( $modules ) as $module_id ) { /** * Filters data associated with a given Script Module. * * Script Modules may require data that is required for initialization or is essential to * have immediately available on page load. These are suitable use cases for this data. * * This is best suited to a minimal set of data and is not intended to replace the REST API. * * If the filter returns no data (an empty array), nothing will be embedded in the page. * * The data for a given Script Module, if provided, will be JSON serialized in a script tag * with an ID like `wp-script-module-data-{$module_id}`. * * The dynamic portion of the hook name, `$module_id`, refers to the Script Module ID that * the data is associated with. * * @param array $data The data that should be associated with the array. */ $data = apply_filters( "script_module_data_{$module_id}", array() ); if ( is_array( $data ) && ! empty( $data ) ) { /* * This data will be printed as JSON inside a script tag like this: * <script type="application/json"></script> * * A script tag must be closed by a sequence beginning with `</`. It's impossible to * close a script tag without using `<`. We ensure that `<` is escaped and `/` can * remain unescaped, so `</script>` will be printed as `\u003C/script\u00E3`. * * - JSON_HEX_TAG: All < and > are converted to \u003C and \u003E. * - JSON_UNESCAPED_SLASHES: Don't escape /. * * If the page will use UTF-8 encoding, it's safe to print unescaped unicode: * * - JSON_UNESCAPED_UNICODE: Encode multibyte Unicode characters literally (instead of as `\uXXXX`). * - JSON_UNESCAPED_LINE_TERMINATORS: The line terminators are kept unescaped when * JSON_UNESCAPED_UNICODE is supplied. It uses the same behaviour as it was * before PHP 7.1 without this constant. Available as of PHP 7.1.0. * * The JSON specification requires encoding in UTF-8, so if the generated HTML page * is not encoded in UTF-8 then it's not safe to include those literals. They must * be escaped to avoid encoding issues. * * @see https://www.rfc-editor.org/rfc/rfc8259.html for details on encoding requirements. * @see https://www.php.net/manual/en/json.constants.php for details on these constants. * @see https://html.spec.whatwg.org/#script-data-state for details on script tag parsing. */ $json_encode_flags = JSON_HEX_TAG | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_LINE_TERMINATORS; if ( 'UTF-8' !== get_option( 'blog_charset' ) ) { $json_encode_flags = JSON_HEX_TAG | JSON_UNESCAPED_SLASHES; } wp_print_inline_script_tag( wp_json_encode( $data, $json_encode_flags ), array( 'type' => 'application/json', 'id' => "wp-script-module-data-{$module_id}", ) ); } } } add_action( 'after_setup_theme', function () { if ( ! has_action( 'wp_footer', array( wp_script_modules(), 'print_script_module_data' ) ) ) { add_action( 'wp_footer', 'gutenberg_print_script_module_data' ); } if ( ! has_action( 'admin_print_footer_scripts', array( wp_script_modules(), 'print_script_module_data' ) ) ) { add_action( 'admin_print_footer_scripts', 'gutenberg_print_script_module_data' ); } }, 20 ); /** * Prints HTML for the a11y Script Module. * * a11y relies on some DOM elements to use as ARIA live regions. * Ideally, these elements are part of the initial HTML of the page * so that accessibility tools can find them and observe updates. */ function gutenberg_a11y_script_module_html() { $a11y_module_available = false; $get_marked_for_enqueue = new ReflectionMethod( 'WP_Script_Modules', 'get_marked_for_enqueue' ); $get_marked_for_enqueue->setAccessible( true ); $get_import_map = new ReflectionMethod( 'WP_Script_Modules', 'get_import_map' ); $get_import_map->setAccessible( true ); foreach ( array_keys( $get_marked_for_enqueue->invoke( wp_script_modules() ) ) as $id ) { if ( '@wordpress/a11y' === $id ) { $a11y_module_available = true; break; } } if ( ! $a11y_module_available ) { foreach ( array_keys( $get_import_map->invoke( wp_script_modules() )['imports'] ) as $id ) { if ( '@wordpress/a11y' === $id ) { $a11y_module_available = true; break; } } } if ( ! $a11y_module_available ) { return; } echo '<div style="position:absolute;margin:-1px;padding:0;height:1px;width:1px;overflow:hidden;clip-path:inset(50%);border:0;word-wrap:normal !important;">' . '<p id="a11y-speak-intro-text" class="a11y-speak-intro-text" hidden>' . esc_html__( 'Notifications', 'default' ) . '</p>' . '<div id="a11y-speak-assertive" class="a11y-speak-region" aria-live="assertive" aria-relevant="additions text" aria-atomic="true"></div>' . '<div id="a11y-speak-polite" class="a11y-speak-region" aria-live="polite" aria-relevant="additions text" aria-atomic="true"></div>' . '</div>'; } if ( ! method_exists( 'WP_Script_Modules', 'print_a11y_script_module_html' ) ) { add_action( 'wp_footer', 'gutenberg_a11y_script_module_html' ); add_action( 'admin_footer', 'gutenberg_a11y_script_module_html' ); }
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