Widgets: Avoid 27 duplicate translations in Media Widgets constructor.

src/wp-includes/default-filters.php

@@ -630,6 +630,7 @@
 // Widgets.
 add_action( 'after_setup_theme', 'wp_setup_widgets_block_editor', 1 );
 add_action( 'init', 'wp_widgets_init', 1 );
+add_action( 'change_locale', array( 'WP_Widget_Media', 'reset_default_labels' ) );
 
 // Admin Bar.
 // Don't remove. Wrong way to disable.

src/wp-includes/widgets/class-wp-widget-media.php

@@ -41,6 +41,22 @@ abstract class WP_Widget_Media extends WP_Widget {
 	 */
 	protected $registered = false;
 
+	/**
+	 * The default widget description.
+	 *
+	 * @since 6.0.0
+	 * @var string
+	 */
+	protected static $default_description = '';
+
+	/**
+	 * The default localized strings used by the widget.
+	 *
+	 * @since 6.0.0
+	 * @var string[]
+	 */
+	protected static $l10n_defaults = array();
+
 	/**
 	 * Constructor.
 	 *
@@ -57,7 +73,7 @@ public function __construct( $id_base, $name, $widget_options = array(), $contro
 		$widget_opts = wp_parse_args(
 			$widget_options,
 			array(
-				'description'                 => __( 'A media item.' ),
+				'description'                 => self::get_default_description(),
 				'customize_selective_refresh' => true,
 				'show_instance_in_rest'       => true,
 				'mime_type'                   => '',
@@ -66,23 +82,7 @@ public function __construct( $id_base, $name, $widget_options = array(), $contro
 
 		$control_opts = wp_parse_args( $control_options, array() );
 
-		$l10n_defaults = array(
-			'no_media_selected'          => __( 'No media selected' ),
-			'add_media'                  => _x( 'Add Media', 'label for button in the media widget' ),
-			'replace_media'              => _x( 'Replace Media', 'label for button in the media widget; should preferably not be longer than ~13 characters long' ),
-			'edit_media'                 => _x( 'Edit Media', 'label for button in the media widget; should preferably not be longer than ~13 characters long' ),
-			'add_to_widget'              => __( 'Add to Widget' ),
-			'missing_attachment'         => sprintf(
-				/* translators: %s: URL to media library. */
-				__( 'That file cannot be found. Check your <a href="%s">media library</a> and make sure it was not deleted.' ),
-				esc_url( admin_url( 'upload.php' ) )
-			),
-			/* translators: %d: Widget count. */
-			'media_library_state_multi'  => _n_noop( 'Media Widget (%d)', 'Media Widget (%d)' ),
-			'media_library_state_single' => __( 'Media Widget' ),
-			'unsupported_file_type'      => __( 'Looks like this is not the correct kind of file. Please link to an appropriate file instead.' ),
-		);
-		$this->l10n    = array_merge( $l10n_defaults, array_filter( $this->l10n ) );
+		$this->l10n = array_merge( self::get_l10n_defaults(), array_filter( $this->l10n ) );
 
 		parent::__construct(
 			$id_base,
@@ -440,6 +440,16 @@ public function render_control_template_scripts() {
 		<?php
 	}
 
+	/**
+	 * Resets the cache for the default labels.
+	 *
+	 * @since 6.0.0
+	 */
+	public static function reset_default_labels() {
+		self::$default_description = '';
+		self::$l10n_defaults       = array();
+	}
+
 	/**
 	 * Whether the widget has content to show.
 	 *
@@ -451,4 +461,52 @@ public function render_control_template_scripts() {
 	protected function has_content( $instance ) {
 		return ( $instance['attachment_id'] && 'attachment' === get_post_type( $instance['attachment_id'] ) ) || $instance['url'];
 	}
+
+	/**
+	 * Returns the default description of the widget.
+	 *
+	 * @since 6.0.0
+	 *
+	 * @var string
+	 */
+	protected static function get_default_description() {
+		if ( self::$default_description ) {
+			return self::$default_description;
+		}
+
+		self::$default_description = __( 'A media item.' );
+		return self::$default_description;
+	}
+
+	/**
+	 * Returns the default localized strings used by the widget.
+	 *
+	 * @since 6.0.0
+	 *
+	 * @return string[]
+	 */
+	protected static function get_l10n_defaults() {
+		if ( ! empty( self::$l10n_defaults ) ) {
+			return self::$l10n_defaults;
+		}
+
+		self::$l10n_defaults = array(
+			'no_media_selected'          => __( 'No media selected' ),
+			'add_media'                  => _x( 'Add Media', 'label for button in the media widget' ),
+			'replace_media'              => _x( 'Replace Media', 'label for button in the media widget; should preferably not be longer than ~13 characters long' ),
+			'edit_media'                 => _x( 'Edit Media', 'label for button in the media widget; should preferably not be longer than ~13 characters long' ),
+			'add_to_widget'              => __( 'Add to Widget' ),
+			'missing_attachment'         => sprintf(
+				/* translators: %s: URL to media library. */
+				__( 'That file cannot be found. Check your <a href="%s">media library</a> and make sure it was not deleted.' ),
+				esc_url( admin_url( 'upload.php' ) )
+			),
+			/* translators: %d: Widget count. */
+			'media_library_state_multi'  => _n_noop( 'Media Widget (%d)', 'Media Widget (%d)' ),
+			'media_library_state_single' => __( 'Media Widget' ),
+			'unsupported_file_type'      => __( 'Looks like this is not the correct kind of file. Please link to an appropriate file instead.' ),
+		);
+
+		return self::$l10n_defaults;
+	}
 }