/**
 * Undo/Redo Manager with History Tracking
 * Maintains command history with memory constraints and conflict resolution
 */
import { Command } from './commands';
export interface HistoryState {
    currentIndex: number;
    commands: Command[];
    totalSize: number;
    isDirty: boolean;
}
export declare class UndoRedoManager {
    private history;
    private currentIndex;
    private maxSize;
    private totalSize;
    private listeners;
    private mergeTimeout;
    private lastCommand;
    private allowMerge;
    constructor(maxSize?: number);
    /**
     * Execute a command and add to history
     */
    execute(command: Command): void;
    /**
     * Undo last command
     */
    undo(): boolean;
    /**
     * Redo last undone command
     */
    redo(): boolean;
    /**
     * Can undo current state
     */
    canUndo(): boolean;
    /**
     * Can redo from current state
     */
    canRedo(): boolean;
    /**
     * Get history state
     */
    getState(): HistoryState;
    /**
     * Get history for UI display
     */
    getHistory(): Array<{
        description: string;
        timestamp: number;
    }>;
    /**
     * Get description of undo action
     */
    getUndoDescription(): string;
    /**
     * Get description of redo action
     */
    getRedoDescription(): string;
    /**
     * Clear all history
     */
    clear(): void;
    /**
     * Prune old commands when exceeding memory limit
     */
    private pruneHistory;
    /**
     * Reset merge timeout to enable command merging
     */
    private resetMergeTimeout;
    /**
     * Subscribe to history changes
     */
    subscribe(listener: (state: HistoryState) => void): () => void;
    /**
     * Notify all listeners of state change
     */
    private notifyListeners;
    /**
     * Jump to specific history index
     */
    jumpTo(index: number): boolean;
    /**
     * Get memory usage in bytes
     */
    getMemoryUsage(): {
        used: number;
        limit: number;
        percentage: number;
    };
}
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