export interface ScannedItem {
    el: HTMLElement;
    buttonEl: HTMLElement | null;
    menuId: string | undefined;
    minStateWidth: string | undefined;
}
export interface ScannedMenu {
    el: HTMLElement;
    triggerEl: HTMLElement;
    menuItemEls: HTMLElement[];
    inMenuIds: Set<string>;
    hasMenuOnlyItems: boolean;
}
export interface ScanResult {
    items: ScannedItem[];
    menu: ScannedMenu | null;
    /** true when the menu appears before items in DOM order */
    menuFirst: boolean;
}
export interface OverflowHost {
    getContainerEl(): HTMLElement;
    scanChildren(): ScanResult;
    isCompact(): boolean;
    isReverse(): boolean;
    isSnap(): boolean;
}
export declare class OverflowController {
    private host;
    private orderedSteps;
    private appliedSteps;
    private minWidthMenuIds;
    private ro;
    private lastScan;
    constructor(host: OverflowHost);
    /** Start observing (call after DOM is ready). */
    connect(): void;
    /** Stop observing and clear all applied state. */
    disconnect(): void;
    /** Re-scan children + restart (call after external DOM changes). */
    update(): void;
    private scan;
    private startObserver;
    private onResize;
    private applyState;
    private applyMenuState;
    private applyCompactCorners;
    private setCorners;
    private applyMinStyles;
    private clearMinStyles;
    private clearState;
}
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