import type { Component } from "../../runtime/component.ts";
export interface ScrollAreaOptions {
    readonly content: Component;
    readonly showScrollbar?: boolean;
    readonly scrollbarColor?: (text: string) => string;
}
/**
 * A scrollable viewport that clips content and renders a vertical scrollbar.
 *
 * The content component is rendered at full width (minus scrollbar), then
 * clipped to the viewport height. A proportional scrollbar thumb indicates
 * scroll position.
 */
export declare class ScrollArea implements Component {
    private readonly options;
    private scrollPosition;
    constructor(options: ScrollAreaOptions);
    render(width: number, height?: number): string[];
    /** Scroll up by N lines (default 1). */
    scrollUp(lines?: number): void;
    /** Scroll down by N lines (default 1). */
    scrollDown(lines?: number): void;
    /** Scroll to an absolute line position. */
    scrollTo(position: number): void;
    /** Scroll to the top. */
    scrollToTop(): void;
    /** Scroll to the bottom. */
    scrollToBottom(viewportHeight: number): void;
    private fitLine;
    private buildScrollbar;
}
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