/**
 * Command Pattern Implementation for Undo/Redo
 * Core command abstraction and registry
 */
export interface Command {
    /** Unique command identifier */
    id: string;
    /** Timestamp when command was created (ms) */
    timestamp: number;
    /** User ID who executed command */
    userId: string;
    /** Execute the command */
    execute(): void;
    /** Undo the command (revert to previous state) */
    undo(): void;
    /** Redo the command after undo */
    redo(): void;
    /** Whether command can be merged with next command (typing chain) */
    canMerge(nextCommand: Command): boolean;
    /** Merge with next command (returns merged command or null) */
    merge(nextCommand: Command): Command | null;
    /** Size in bytes for memory tracking */
    getSize(): number;
    /** Human-readable description for history UI */
    getDescription(): string;
}
export declare class InsertTextCommand implements Command {
    readonly id: string;
    readonly timestamp: number;
    readonly userId: string;
    private previousContent;
    private newContent;
    private position;
    private insertedText;
    constructor(userId: string, previousContent: string, insertedText: string, position: number);
    execute(): void;
    undo(): void;
    redo(): void;
    canMerge(nextCommand: Command): boolean;
    merge(nextCommand: Command): Command | null;
    getSize(): number;
    getDescription(): string;
    getContent(version: 'previous' | 'new'): string;
}
export declare class DeleteTextCommand implements Command {
    readonly id: string;
    readonly timestamp: number;
    readonly userId: string;
    private previousContent;
    private newContent;
    private position;
    private deletedText;
    private length;
    constructor(userId: string, previousContent: string, position: number, length: number);
    execute(): void;
    undo(): void;
    redo(): void;
    canMerge(nextCommand: Command): boolean;
    merge(nextCommand: Command): Command | null;
    getSize(): number;
    getDescription(): string;
    getContent(version: 'previous' | 'new'): string;
}
export declare class FormatTextCommand implements Command {
    readonly id: string;
    readonly timestamp: number;
    readonly userId: string;
    private previousContent;
    private newContent;
    private startPos;
    private endPos;
    private format;
    private enabled;
    constructor(userId: string, previousContent: string, newContent: string, startPos: number, endPos: number, format: 'bold' | 'italic' | 'underline' | 'strikethrough', enabled: boolean);
    execute(): void;
    undo(): void;
    redo(): void;
    canMerge(nextCommand: Command): boolean;
    merge(nextCommand: Command): Command | null;
    getSize(): number;
    getDescription(): string;
    getContent(version: 'previous' | 'new'): string;
}
export declare class MacroCommand implements Command {
    readonly id: string;
    readonly timestamp: number;
    readonly userId: string;
    private commands;
    private name;
    constructor(userId: string, commands: Command[], name?: string);
    execute(): void;
    undo(): void;
    redo(): void;
    canMerge(): boolean;
    merge(): null;
    getSize(): number;
    getDescription(): string;
    getCommandCount(): number;
}
type CommandConstructor = new (...args: any[]) => Command;
export declare class CommandRegistry {
    private registry;
    register(type: string, commandClass: CommandConstructor): void;
    get(type: string): CommandConstructor | undefined;
    has(type: string): boolean;
}
export declare const defaultRegistry: CommandRegistry;
export {};
//# sourceMappingURL=commands.d.ts.map