export interface RegionRendererOptions {
    stdout?: NodeJS.WriteStream;
    disableRendering?: boolean;
    onKeepAlive?: () => void;
    debugLog?: string;
}
export declare class RegionRenderer {
    width: number;
    height: number;
    pendingFrame: string[];
    previousFrame: string[];
    disableRendering: boolean;
    lastRenderedHeight: number;
    private readonly stdout;
    private readonly throttle;
    private readonly renderBuffer;
    private readonly permanentlyDisabled;
    private readonly onKeepAlive?;
    private viewportWidth;
    private viewportHeight;
    private previousViewportFrame;
    private effectiveWidth;
    private autoWrapDisabled;
    private inAlternateScreen;
    private isRendering;
    private renderTimer;
    private resizeCleanup?;
    private destroyed;
    private explicitlyDestroyed;
    private debugLogPath?;
    private debugLogCleared;
    private cursorVisible;
    private static exitHandlerSetup;
    private static activeRegions;
    constructor(options?: RegionRendererOptions);
    getWidth(): number;
    getHeight(): number;
    getStartRow(): Promise<number | null>;
    setThrottleFps(fps: number): void;
    setLine(lineNumber: number, content: string): void;
    updateLines(updates: Array<{
        lineNumber: number;
        content: string;
    }>): void;
    set(content: string): void;
    getLine(lineNumber: number): string;
    clearLine(lineNumber: number): void;
    clear(): void;
    flush(): void;
    expandTo(newHeight: number): void;
    setHeight(height: number): void;
    shrinkFrame(startIndex: number, count: number): void;
    destroy(clearFirst?: boolean): void;
    logToFile(message: string): void;
    private static registerRegion;
    private static setupExitHandler;
    ensureFrameSize(size: number): void;
    private scheduleRender;
    private renderNow;
    private copyPendingToPrevious;
    private buildViewportFrame;
    private mapLineToViewportRow;
    hideCursor(): void;
    showCursorAt(lineNumber: number, column: number): void;
    private getEffectiveFrame;
    private applyDiff;
    private truncateContent;
    private initializeTerminalState;
    private ensureTerminalState;
    private leaveAlternateScreen;
    private setupResizeHandler;
    private updateViewportMetrics;
    private readViewportWidth;
    private readViewportHeight;
    private resolveDebugLogPath;
}
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