Editor: Enqueue assets for format library for the block editor

Ensures that `wp-format-library` assets are always loaded for the block editor. Otherwise, they have to be loaded individually for every screen that needs it. It's similar to how `wp-block-directory` assets are handled.

Props ellatrix.
See #52920.



git-svn-id: https://develop.svn.wordpress.org/trunk@50620 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/edit-form-blocks.php

@@ -39,7 +39,6 @@ add_filter( 'screen_options_show_screen', '__return_false' );
 
 wp_enqueue_script( 'heartbeat' );
 wp_enqueue_script( 'wp-edit-post' );
-wp_enqueue_script( 'wp-format-library' );
 
 $rest_base = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
 
@@ -398,7 +397,6 @@ wp_enqueue_editor();
  * Styles
  */
 wp_enqueue_style( 'wp-edit-post' );
-wp_enqueue_style( 'wp-format-library' );
 
 /**
  * Fires after block assets have been enqueued for the editing interface.

src/wp-includes/default-filters.php

@@ -538,6 +538,7 @@ add_action( 'admin_enqueue_scripts', 'wp_localize_jquery_ui_datepicker', 1000 );
 add_action( 'wp_enqueue_scripts', 'wp_common_block_scripts_and_styles' );
 add_action( 'admin_enqueue_scripts', 'wp_common_block_scripts_and_styles' );
 add_action( 'enqueue_block_assets', 'wp_enqueue_registered_block_scripts_and_styles' );
+add_action( 'enqueue_block_editor_assets', 'wp_enqueue_editor_format_library_assets' );
 add_action( 'enqueue_block_editor_assets', 'wp_enqueue_registered_block_scripts_and_styles' );
 add_action( 'admin_print_scripts-index.php', 'wp_localize_community_events' );
 add_filter( 'wp_print_scripts', 'wp_just_in_time_script_localization' );

src/wp-includes/script-loader.php

@@ -2323,6 +2323,16 @@ function enqueue_editor_block_styles_assets() {
 	wp_enqueue_script( 'wp-block-styles' );
 }
 
+/**
+ * Enqueues the assets required for the format library within the block editor.
+ *
+ * @since 5.8.0
+ */
+function wp_enqueue_editor_format_library_assets() {
+	wp_enqueue_script( 'wp-format-library' );
+	wp_enqueue_style( 'wp-format-library' );
+}
+
 /**
  * Enqueues the assets required for the block directory within the block editor.
  *