export type ConversationMenuAnchor = Pick<DOMRect, 'left' | 'right' | 'top' | 'bottom'>;
export interface ConversationMenuPoint {
    x: number;
    y: number;
}
/** Only the narrow shared edge is traversable, not the space below the card. */
export declare function conversationMenuHoverBridge(anchor: ConversationMenuAnchor, menu: ConversationMenuAnchor): ConversationMenuAnchor | undefined;
/** One document-level host, outside workspace clipping and without its own stacking context. */
export declare function conversationMenuLayer(doc: Document): HTMLElement;
export declare function conversationMenuPosition(anchor: ConversationMenuAnchor, width: number, height: number, viewport: {
    width: number;
    height: number;
}): {
    left: number;
    top: number;
};
export interface ConversationMenuHoverRequest {
    focusMenu: boolean;
    anchor(): ConversationMenuAnchor;
    checkPointer(target: EventTarget | null, point?: ConversationMenuPoint): void;
    onClose(focus?: boolean): void;
}
interface ConversationMenuHoverAdapter {
    open(request: ConversationMenuHoverRequest): boolean;
    close(): void;
    position(): void;
    contains(target: EventTarget | null): boolean;
    /** Visible menu layers in the anchor document's viewport coordinates; main menu first. */
    bounds(): ConversationMenuAnchor[];
}
/** Timing, dismissal, keyboard entry and mutual exclusion are identical for both lists. */
export declare function watchConversationMenuHover(anchor: HTMLElement, adapter: ConversationMenuHoverAdapter): () => void;
export {};
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