export type DiffOp = "context" | "add" | "del";
export interface DiffLine {
    readonly op: DiffOp;
    readonly text: string;
    readonly oldLine?: number | undefined;
    readonly newLine?: number | undefined;
}
export interface DiffHunk {
    readonly oldStart: number;
    readonly newStart: number;
    readonly lines: readonly DiffLine[];
}
export interface DeletedSegment {
    readonly atNewLine: number;
    readonly oldStart: number;
    readonly lines: readonly string[];
}
export declare const DIFF_MAX_LINES = 20000;
export declare const PREVIEW_MAX_DIFF_LINES = 40;
export declare const PREVIEW_CONTEXT = 1;
export declare function computeLineOps(oldLines: readonly string[], newLines: readonly string[]): DiffLine[];
export declare function wholeFileReplace(oldLines: readonly string[], newLines: readonly string[]): DiffLine[];
export declare function groupHunks(ops: readonly DiffLine[], context?: number): DiffHunk[];
export declare function capPreviewHunks(hunks: readonly DiffHunk[], maxLines?: number): {
    hunks: DiffHunk[];
    truncated: boolean;
    omittedLines: number;
};
export declare function countOps(ops: readonly DiffLine[]): {
    added: number;
    removed: number;
};
export declare function collectAddedNewLines(ops: readonly DiffLine[]): number[];
export declare function collectDeletedAt(ops: readonly DiffLine[]): DeletedSegment[];