import { Observable, Subject } from 'rxjs';
import { Context } from '../context/Context';
import { ReaderSettingsManager } from '../settings/ReaderSettingsManager';
import { SpineItem } from '../spineItem/SpineItem';
import { DestroyableClass } from '../utils/DestroyableClass';
import { Viewport } from '../viewport/Viewport';
import { SpineItemsManager } from './SpineItemsManager';
import { SpineItemsObserver } from './SpineItemsObserver';
import { SpineItemSpineLayout } from './types';
export type SpineLayoutOptions = {
    immediate?: boolean;
};
export declare class SpineLayout extends DestroyableClass {
    protected spineItemsManager: SpineItemsManager;
    protected spineItemsObserver: SpineItemsObserver;
    protected context: Context;
    protected settings: ReaderSettingsManager;
    protected viewport: Viewport;
    protected externalLayoutTrigger: Subject<SpineLayoutOptions>;
    protected spineItemsRelativeLayouts: SpineItemSpineLayout[];
    readonly layout$: Observable<unknown>;
    constructor(spineItemsManager: SpineItemsManager, spineItemsObserver: SpineItemsObserver, context: Context, settings: ReaderSettingsManager, viewport: Viewport);
    private watchForVerticalWritingUpdate;
    layout(options?: SpineLayoutOptions): void;
    getSpineItemSpineLayoutInfo(spineItemOrIndex: SpineItem | number | string | undefined): SpineItemSpineLayout;
    get numberOfPages(): number;
    destroy(): void;
    private getSpreadPosition;
    private getStartEdges;
    private createSpineItemLayout;
}