import { BoxTransform, InteractionBox, ResizeHandleId } from 'pptx-viewer-shared';
/**
 * Small geometry helpers the shared `element-interaction` module does not
 * cover: Shift-to-lock-aspect on corner resizes and arrow-key nudge steps.
 * Pure math only (mirrors the vanilla binding's `editor-geometry`); no Svelte
 * or DOM dependencies, so it is unit-testable in isolation.
 */
/** Arrow-key nudge step in element px (Shift multiplies to the large step). */
export declare const NUDGE_STEP = 1;
export declare const NUDGE_STEP_LARGE = 10;
/** True for the four corner handles (the ones Shift aspect-locks). */
export declare function isCornerHandle(handle: ResizeHandleId): boolean;
/**
 * Constrain a corner resize (already computed by the shared `applyResize`) to
 * the start box's aspect ratio: the axis with the larger relative change wins
 * and the other follows, keeping the anchored (opposite) corner fixed. Edge
 * handles are returned unchanged; aspect-locking a one-axis handle would
 * fight the drag direction.
 */
export declare function lockResizeAspect(resized: BoxTransform, start: InteractionBox, handle: ResizeHandleId, minSize?: number): BoxTransform;
/**
 * Map an arrow key to a nudge delta in element px, or `null` for other keys.
 * `large` (Shift held) uses the 10px step.
 */
export declare function nudgeDelta(key: string, large: boolean): {
    dx: number;
    dy: number;
} | null;
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