/**
 * Viewport helpers for the Comments plugin editor.
 *
 * Both functions are pure and have no DOM or Handsontable dependency, so they
 * can be unit-tested in isolation.
 *
 * @private
 */
export declare const VIEWPORT_MARGIN = 8;
/**
 * Caps the given size so it never exceeds the viewport (minus any reserved
 * scrollbar widths and 2 * margin) on each axis. Used to prevent the comments
 * editor from rendering larger than the visible viewport (most common on
 * mobile portrait screens).
 *
 * @param {{ width: number, height: number }} size The desired size.
 * @param {object} viewport Viewport dimensions.
 * @param {number} viewport.innerWidth Viewport inner width in pixels.
 * @param {number} viewport.innerHeight Viewport inner height in pixels.
 * @param {number} [viewport.verticalScrollbarWidth] Width of the vertical scrollbar, if any.
 * @param {number} [viewport.horizontalScrollbarWidth] Height of the horizontal scrollbar, if any.
 * @param {number} [margin] Distance to keep from the viewport edges. Defaults to `VIEWPORT_MARGIN`.
 * @returns {{ width: number, height: number }} The capped size.
 */
export declare function shrinkSizeToViewport(size: {
    width: number;
    height: number;
}, viewport: {
    innerWidth: number;
    innerHeight: number;
    verticalScrollbarWidth?: number;
    horizontalScrollbarWidth?: number;
}, margin?: number): {
    width: number;
    height: number;
};
/**
 * Clamps a rectangle's document-space x/y so it remains fully inside the
 * viewport, accounting for page scroll and reserved scrollbar widths.
 *
 * When the rect is wider/taller than the available viewport area (which can
 * happen if `shrinkSizeToViewport` was not applied first), the function
 * prefers the top/left edge so the rect stays anchored to the visible area
 * rather than wrapping into negative coordinates.
 *
 * @param {{ x: number, y: number, width: number, height: number }} rect The target rectangle.
 * @param {object} viewport Viewport dimensions and scroll offsets.
 * @param {number} viewport.innerWidth Viewport inner width in pixels.
 * @param {number} viewport.innerHeight Viewport inner height in pixels.
 * @param {number} viewport.scrollX Horizontal page scroll offset.
 * @param {number} viewport.scrollY Vertical page scroll offset.
 * @param {number} [viewport.verticalScrollbarWidth] Width of the vertical scrollbar, if any.
 * @param {number} [viewport.horizontalScrollbarWidth] Height of the horizontal scrollbar, if any.
 * @param {number} [margin] Distance to keep from the viewport edges. Defaults to `VIEWPORT_MARGIN`.
 * @returns {{ x: number, y: number }} The clamped x/y.
 */
export declare function clampPositionToViewport(rect: {
    x: number;
    y: number;
    width: number;
    height: number;
}, viewport: {
    innerWidth: number;
    innerHeight: number;
    scrollX: number;
    scrollY: number;
    verticalScrollbarWidth?: number;
    horizontalScrollbarWidth?: number;
}, margin?: number): {
    x: number;
    y: number;
};