WP_Widget_Media_Image

18class WP_Widget_Media_Image extends WP_Widget_Media {19 20	/**21	 * Constructor.22	 *23	 * @since 4.8.024	 */25	public function __construct() {26		parent::__construct(27			'media_image',28			__( 'Image' ),29			array(30				'description' => __( 'Displays an image.' ),31				'mime_type'   => 'image',32			)33		);34 35		$this->l10n = array_merge(36			$this->l10n,37			array(38				'no_media_selected'          => __( 'No image selected' ),39				'add_media'                  => _x( 'Add Image', 'label for button in the image widget' ),40				'replace_media'              => _x( 'Replace Image', 'label for button in the image widget; should preferably not be longer than ~13 characters long' ),41				'edit_media'                 => _x( 'Edit Image', 'label for button in the image widget; should preferably not be longer than ~13 characters long' ),42				'missing_attachment'         => sprintf(43					/* translators: %s: URL to media library. */44					__( 'That image 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( 'Image Widget (%d)', 'Image Widget (%d)' ),49				'media_library_state_single' => __( 'Image Widget' ),50			)51		);52	}53 54	/**55	 * Get schema for properties of a widget instance (item).56	 *57	 * @since 4.8.058	 *59	 * @see WP_REST_Controller::get_item_schema()60	 * @see WP_REST_Controller::get_additional_fields()61	 * @link https://core.trac.wordpress.org/ticket/3557462	 *63	 * @return array Schema for properties.64	 */65	public function get_instance_schema() {66		return array_merge(67			array(68				'size'              => array(69					'type'        => 'string',70					'enum'        => array_merge( get_intermediate_image_sizes(), array( 'full', 'custom' ) ),71					'default'     => 'medium',72					'description' => __( 'Size' ),73				),74				'width'             => array( // Via 'customWidth', only when size=custom; otherwise via 'width'.75					'type'        => 'integer',76					'minimum'     => 0,77					'default'     => 0,78					'description' => __( 'Width' ),79				),80				'height'            => array( // Via 'customHeight', only when size=custom; otherwise via 'height'.81					'type'        => 'integer',82					'minimum'     => 0,83					'default'     => 0,84					'description' => __( 'Height' ),85				),86 87				'caption'           => array(88					'type'                  => 'string',89					'default'               => '',90					'sanitize_callback'     => 'wp_kses_post',91					'description'           => __( 'Caption' ),92					'should_preview_update' => false,93				),94				'alt'               => array(95					'type'              => 'string',96					'default'           => '',97					'sanitize_callback' => 'sanitize_text_field',