+ add_action( 'admin_footer', array( $this, '_js_vars' ) );
+ }
+
+ if ( empty( $this->modes ) ) {
+ $this->modes = array(
+ 'list' => __( 'List View' ),
+ 'excerpt' => __( 'Excerpt View' )
+ );
+ }
+ }
+
+ /**
+ * Make private properties readable for backward compatibility.
+ *
+ * @since 4.0.0
+ * @access public
+ *
+ * @param string $name Property to get.
+ * @return mixed Property.
+ */
+ public function __get( $name ) {
+ if ( in_array( $name, $this->compat_fields ) ) {
+ return $this->$name;
+ }
+ }
+
+ /**
+ * Make private properties settable for backward compatibility.
+ *
+ * @since 4.0.0
+ * @access public
+ *
+ * @param string $name Property to check if set.
+ * @param mixed $value Property value.
+ * @return mixed Newly-set property.
+ */
+ public function __set( $name, $value ) {
+ if ( in_array( $name, $this->compat_fields ) ) {
+ return $this->$name = $value;
+ }
+ }
+
+ /**
+ * Make private properties checkable for backward compatibility.
+ *
+ * @since 4.0.0
+ * @access public
+ *
+ * @param string $name Property to check if set.
+ * @return bool Whether the property is set.
+ */
+ public function __isset( $name ) {
+ if ( in_array( $name, $this->compat_fields ) ) {
+ return isset( $this->$name );
+ }
+ }
+
+ /**
+ * Make private properties un-settable for backward compatibility.
+ *
+ * @since 4.0.0
+ * @access public
+ *
+ * @param string $name Property to unset.
+ */
+ public function __unset( $name ) {
+ if ( in_array( $name, $this->compat_fields ) ) {
+ unset( $this->$name );
+ }
+ }
+
+ /**
+ * Make private/protected methods readable for backward compatibility.
+ *
+ * @since 4.0.0
+ * @access public
+ *
+ * @param callable $name Method to call.
+ * @param array $arguments Arguments to pass when calling.
+ * @return mixed|bool Return value of the callback, false otherwise.
+ */
+ public function __call( $name, $arguments ) {
+ if ( in_array( $name, $this->compat_methods ) ) {
+ return call_user_func_array( array( $this, $name ), $arguments );