/**
 * Holds the host page still while strokes or a note card are on screen.
 *
 * Annotations are positioned in viewport coordinates; scrolling moves the page
 * out from under them. The lock engages when drawing starts or a note card
 * opens, and releases when the surface tears down or the flow ends (exitAll).
 *
 * Nothing on the host page is mutated. Cancelling the gestures that scroll
 * leaves the page's own styles untouched, so there is nothing to restore and
 * nothing to strand if teardown is ever missed.
 */
export interface ScrollLock {
    /** Let the page scroll again. Safe to call more than once. */
    release(): void;
}
export declare function lockPageScroll(): ScrollLock;
//# sourceMappingURL=scroll-lock.d.ts.map