import { type Component, type TUI } from "@elyracode/tui";
export interface DiffViewerCallbacks {
    /** Open the diff in the external editor. */
    onOpenEditor: () => void;
    /** Close the viewer. */
    onClose: () => void;
}
/**
 * Full-height, scrollable diff viewer rendered in the editor area.
 *
 * Keys:
 * - up/down: scroll one line
 * - PageUp/PageDown: scroll one viewport
 * - g / G (or Home / End): jump to top / bottom
 * - e: open the diff in the external editor
 * - Esc / q: close
 */
export declare class DiffViewerComponent implements Component {
    private tui;
    private title;
    private callbacks;
    private readonly styledLines;
    private scrollOffset;
    private lastViewport;
    constructor(tui: TUI, diffText: string, title: string, callbacks: DiffViewerCallbacks);
    invalidate(): void;
    private getViewportHeight;
    private clampScroll;
    render(width: number): string[];
    handleInput(keyData: string): void;
}
//# sourceMappingURL=diff-viewer.d.ts.map