/** @jsxImportSource preact */
/**
 * @license
 * Copyright 2026 Steven Roussey <sroussey@gmail.com>
 * SPDX-License-Identifier: Apache-2.0
 */
import type { JSX } from "preact";
import { type RailSide } from "../railWidths";
export interface RailResizerProps {
    readonly side: RailSide;
    /** Current width of the rail this handle drags. */
    readonly width: number;
    /** Width of the OTHER rail, which is part of what bounds this one. */
    readonly otherWidth: number;
    readonly onResize: (width: number) => void;
}
/**
 * The draggable seam between a rail and the centre column.
 *
 * Positioned against `.app` rather than parented to the rail: the status rail
 * scrolls, and an absolutely positioned child of a scrollport rides its
 * content instead of standing still at the edge.
 *
 * It is a `separator` with a value, so the keyboard gets the same range the
 * pointer does — a resize that only exists under a mouse is a resize half the
 * operators cannot make.
 */
export declare function RailResizer({ side, width, otherWidth, onResize }: RailResizerProps): JSX.Element;