WP_Widget_Media_Video

18class WP_Widget_Media_Video extends WP_Widget_Media {19 20	/**21	 * Constructor.22	 *23	 * @since 4.8.024	 */25	public function __construct() {26		parent::__construct(27			'media_video',28			__( 'Video' ),29			array(30				'description' => __( 'Displays a video from the media library or from YouTube, Vimeo, or another provider.' ),31				'mime_type'   => 'video',32			)33		);34 35		$this->l10n = array_merge(36			$this->l10n,37			array(38				'no_media_selected'          => __( 'No video selected' ),39				'add_media'                  => _x( 'Add Video', 'label for button in the video widget' ),40				'replace_media'              => _x( 'Replace Video', 'label for button in the video widget; should preferably not be longer than ~13 characters long' ),41				'edit_media'                 => _x( 'Edit Video', 'label for button in the video widget; should preferably not be longer than ~13 characters long' ),42				'missing_attachment'         => sprintf(43					/* translators: %s: URL to media library. */44					__( 'That video cannot be found. Check your <a href="%s">media library</a> and make sure it was not deleted.' ),45					esc_url( admin_url( 'upload.php' ) )46				),47				/* translators: %d: Widget count. */48				'media_library_state_multi'  => _n_noop( 'Video Widget (%d)', 'Video Widget (%d)' ),49				'media_library_state_single' => __( 'Video Widget' ),50				/* translators: %s: A list of valid video file extensions. */51				'unsupported_file_type'      => sprintf( __( 'Sorry, the video at the supplied URL cannot be loaded. Please check that the URL is for a supported video file (%s) or stream (e.g. YouTube and Vimeo).' ), '<code>.' . implode( '</code>, <code>.', wp_get_video_extensions() ) . '</code>' ),52			)53		);54	}55 56	/**57	 * Get schema for properties of a widget instance (item).58	 *59	 * @since 4.8.060	 *61	 * @see WP_REST_Controller::get_item_schema()62	 * @see WP_REST_Controller::get_additional_fields()63	 * @link https://core.trac.wordpress.org/ticket/3557464	 *65	 * @return array Schema for properties.66	 */67	public function get_instance_schema() {68 69		$schema = array(70			'preload' => array(71				'type'                  => 'string',72				'enum'                  => array( 'none', 'auto', 'metadata' ),73				'default'               => 'metadata',74				'description'           => __( 'Preload' ),75				'should_preview_update' => false,76			),77			'loop'    => array(78				'type'                  => 'boolean',79				'default'               => false,80				'description'           => __( 'Loop' ),81				'should_preview_update' => false,82			),83			'content' => array(84				'type'                  => 'string',85				'default'               => '',86				'sanitize_callback'     => 'wp_kses_post',87				'description'           => __( 'Tracks (subtitles, captions, descriptions, chapters, or metadata)' ),88				'should_preview_update' => false,89			),90		);91 92		foreach ( wp_get_video_extensions() as $video_extension ) {93			$schema[ $video_extension ] = array(94				'type'        => 'string',95				'default'     => '',96				'format'      => 'uri',97				/* translators: %s: Video extension. */