/**
 * Diff view — side-by-side ≥ 100 cols, unified otherwise.
 *
 * Implements the "Diff rendering: side-by-side ≥ 100 cols, unified otherwise,
 * AAA contrast" deliverable from WS10. This component takes a pre-computed
 * line diff (additions / deletions / context) and lays it out for a given
 * terminal width. Hunk parsing is the caller's job — the existing edit-format
 * renderers in `coding-agent/src/core/edit-formats/` (WS8 territory) will
 * produce these line-tagged inputs.
 */
import type { Component } from "../tui.js";
export type DiffLineKind = "context" | "add" | "del" | "header" | "hunk";
export interface DiffLine {
    kind: DiffLineKind;
    text: string;
    oldLine?: number;
    newLine?: number;
}
export interface DiffViewTheme {
    add: (text: string) => string;
    del: (text: string) => string;
    context: (text: string) => string;
    header: (text: string) => string;
    hunk: (text: string) => string;
    gutterAdd: (text: string) => string;
    gutterDel: (text: string) => string;
    gutterContext: (text: string) => string;
    separator: (text: string) => string;
}
/** Threshold below which we render unified rather than side-by-side. */
export declare const SIDE_BY_SIDE_MIN_WIDTH = 100;
export type DiffLayout = "unified" | "side-by-side";
export declare function pickLayout(width: number): DiffLayout;
export interface DiffViewOptions {
    lines: DiffLine[];
    theme?: DiffViewTheme;
    /** Force a specific layout. Default: width-based per `pickLayout`. */
    forceLayout?: DiffLayout;
    /** Show line-number gutter. */
    showLineNumbers?: boolean;
}
export declare class DiffView implements Component {
    private lines;
    private theme;
    private forceLayout?;
    private showLineNumbers;
    constructor(options: DiffViewOptions);
    setLines(lines: DiffLine[]): void;
    invalidate(): void;
    render(width: number): string[];
    private renderUnified;
    private renderSideBySide;
    private formatHalf;
    private formatGutter;
}
interface DiffPair {
    kind: DiffLineKind;
    text: string;
    left?: DiffLine;
    right?: DiffLine;
}
/**
 * Pair up consecutive del/add runs for side-by-side layout. Within a hunk:
 *
 *   [del A, del B, add C, add D, ctx X]
 *
 * becomes:
 *
 *   [del A | add C, del B | add D, ctx X | ctx X]
 *
 * Mismatched lengths are padded with empty halves.
 */
export declare function pairUpHunks(lines: DiffLine[]): DiffPair[];
export {};
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