export type DiffLineKind = "same" | "added" | "removed" | "changed";
export type DiffLine = {
    kind: DiffLineKind;
    left?: string;
    right?: string;
};
export type DiffStats = {
    same: number;
    changed: number;
    added: number;
    removed: number;
    total: number;
};
/** Merge adjacent removed+added pairs into changed rows. */
export declare function coalesceChangedRows(rows: DiffLine[]): DiffLine[];
/** Line-level LCS diff with changed-row coalescing. */
export declare function computeLineDiff(leftText: string, rightText: string): DiffLine[];
export type WordDiffHighlight = {
    text: string;
    highlight: boolean;
};
/** Token-level diff for one side of a changed line pair. */
export declare function computeWordDiffHighlights(line: string, otherLine: string, side: "left" | "right"): WordDiffHighlight[];
/** HTML with inline word highlights for native ODT/DOCX-style diff blocks. */
export declare function buildWordDiffHtml(line: string, otherLine: string, side: "left" | "right"): string;
export declare function computeDiffStats(rows: DiffLine[]): DiffStats;
export declare function createDiffToolbar(stats: DiffStats): HTMLElement;
export declare function renderSplitPaneDiffLines(inner: HTMLElement, rows: DiffLine[], side: "left" | "right"): void;
export type SplitInlineDiffOptions = {
    leftLabel?: string;
    rightLabel?: string;
    exportSummary?: boolean;
};
export declare function renderSplitInlineDiff(toolbarHost: HTMLElement, leftInner: HTMLElement, rightInner: HTMLElement, leftText: string, rightText: string, options?: SplitInlineDiffOptions): DiffStats;
export declare function renderDocumentDiff(container: HTMLElement, leftText: string, rightText: string, labels: [string, string]): DiffStats;
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