import type { PPTElement } from '../types/slides';
/**
 * One row of the Alt+Click layer picker: an element (or a whole group)
 * whose visual box contains the probed point.
 */
export interface LayerStackEntry {
    /** Representative element — for groups, the topmost member under the point. */
    element: PPTElement;
    /** Ids applied to the selection when this entry is picked (empty when locked). */
    memberIds: string[];
    groupId?: string;
    groupSize?: number;
    locked: boolean;
}
/**
 * All layers under a wrapper-space point, top → bottom.
 *
 * Group members collapse into a single entry (picking one selects the whole
 * group, matching canvas click behavior). Hidden elements are skipped; locked
 * elements are listed but marked non-selectable.
 */
export declare function layerStackAtPoint(elementList: PPTElement[], canvasScale: number, hiddenElementIdList: Iterable<string>, x: number, y: number): LayerStackEntry[];
/** Index of the next selectable entry below `fromIndex`, wrapping. -1 when none. */
export declare function nextSelectableLayer(entries: LayerStackEntry[], fromIndex: number): number;