+case 'wp-remove-post-lock' :
+ if ( empty( $_POST['post_ID'] ) || empty( $_POST['active_post_lock'] ) )
+ die( '0' );
+ $post_id = (int) $_POST['post_ID'];
+ if ( ! $post = get_post( $post_id ) )
+ die( '0' );
+
+ check_ajax_referer( 'update-' . $post->post_type . '_' . $post_id );
+
+ if ( ! current_user_can( 'edit_post', $post_id ) )
+ die( '-1' );
+
+ $active_lock = array_map( 'absint', explode( ':', $_POST['active_post_lock'] ) );
+ if ( $active_lock[1] != get_current_user_id() )
+ die( '0' );
+
+ $new_lock = ( time() - apply_filters( 'wp_check_post_lock_window', AUTOSAVE_INTERVAL * 2 ) + 5 ) . ':' . $active_lock[1];
+ update_post_meta( $post_id, '_edit_lock', $new_lock, implode( ':', $active_lock ) );
+ die( '1' );
+case 'dismiss-wp-pointer' :
+ $pointer = $_POST['pointer'];
+ if ( $pointer != sanitize_key( $pointer ) )
+ die( '0' );
+
+// check_ajax_referer( 'dismiss-pointer_' . $pointer );
+
+ $dismissed = array_filter( explode( ',', (string) get_user_meta( get_current_user_id(), 'dismissed_wp_pointers', true ) ) );
+
+ if ( in_array( $pointer, $dismissed ) )
+ die( '0' );
+
+ $dismissed[] = $pointer;
+ $dismissed = implode( ',', $dismissed );
+
+ update_user_meta( get_current_user_id(), 'dismissed_wp_pointers', $dismissed );
+ die( '1' );
+ break;