Custom_Background

14#[AllowDynamicProperties]15class Custom_Background {16 17	/**18	 * Callback for administration header.19	 *20	 * @since 3.0.021	 * @var callable22	 */23	public $admin_header_callback;24 25	/**26	 * Callback for header div.27	 *28	 * @since 3.0.029	 * @var callable30	 */31	public $admin_image_div_callback;32 33	/**34	 * Used to trigger a success message when settings updated and set to true.35	 *36	 * @since 3.0.037	 * @var bool38	 */39	private $updated;40 41	/**42	 * Constructor - Registers administration header callback.43	 *44	 * @since 3.0.045	 *46	 * @param callable $admin_header_callback    Optional. Administration header callback.47	 *                                           Default empty string.48	 * @param callable $admin_image_div_callback Optional. Custom image div output callback.49	 *                                           Default empty string.50	 */51	public function __construct( $admin_header_callback = '', $admin_image_div_callback = '' ) {52		$this->admin_header_callback    = $admin_header_callback;53		$this->admin_image_div_callback = $admin_image_div_callback;54 55		add_action( 'admin_menu', array( $this, 'init' ) );56 57		add_action( 'wp_ajax_custom-background-add', array( $this, 'ajax_background_add' ) );58 59		// Unused since 3.5.0.60		add_action( 'wp_ajax_set-background-image', array( $this, 'wp_set_background_image' ) );61	}62 63	/**64	 * Sets up the hooks for the Custom Background admin page.65	 *66	 * @since 3.0.067	 */68	public function init() {69		$page = add_theme_page(70			_x( 'Background', 'custom background' ),71			_x( 'Background', 'custom background' ),72			'edit_theme_options',73			'custom-background',74			array( $this, 'admin_page' )75		);76 77		if ( ! $page ) {78			return;79		}80 81		add_action( "load-{$page}", array( $this, 'admin_load' ) );82		add_action( "load-{$page}", array( $this, 'take_action' ), 49 );83		add_action( "load-{$page}", array( $this, 'handle_upload' ), 49 );84 85		if ( $this->admin_header_callback ) {86			add_action( "admin_head-{$page}", $this->admin_header_callback, 51 );87		}88	}89 90	/**91	 * Sets up the enqueue for the CSS & JavaScript files.92	 *93	 * @since 3.0.0