import { ViewerOptions } from "../ViewerOptions";
import { UndoCommandSupport } from "./Commands/UndoCommandSupport";
/**
 * Command based undo state storage.
 **/
export interface IUndoStorage {
    /**
     * Apply undo storage options.
     * @param options
     */
    applyOptions(options: Partial<ViewerOptions>): any;
    /**
     * Dispose undo storage.
     **/
    dispose(): any;
    /**
     * Clear undo storage.
     **/
    clear(): any;
    /**
     * Gets a value indicating whether the command specified in the command parameter is supported.
     * @param command
     **/
    isCommandSupported(command: UndoCommandSupport): boolean;
    /**
    * Execute a new command.
    * @param {type} command Instance of a command.
    * @returns {undefined}
    **/
    execute(command: UndoCommandSupport): Promise<void>;
    /**
     * Called after command action has been executed.
     * @param command
     */
    onCommandExecuted(command: UndoCommandSupport): any;
    /**
     * Undo last action.
     **/
    undo(): Promise<void>;
    /**
     * Redo next action.
     **/
    redo(): Promise<void>;
    /**
    * Gets a value indicating whether the undo storage can undo changes.
    **/
    readonly hasUndo: boolean;
    /**
     * Gets a value indicating whether the undo storage can redo changes.
     **/
    readonly hasRedo: boolean;
    /**
     * Gets current undo level index.
     **/
    readonly undoIndex: number;
    /**
     * Gets total undo levels count.
     **/
    readonly undoCount: number;
    /**
     * Gets a flag indicating whether an undo/redo or execute operation is in progress.
     **/
    readonly undoInProgress: boolean;
    /**
     * Gets undo commands list. Used by FiltersPreviewPanel.
     * @ignore exclude from docs.
     **/
    readonly commands: UndoCommandSupport[];
}