/** Search and highlighting helpers for rendered conversation lines. */
/** A substring match in a rendered line's plain-text representation. */
export type ConversationMatch = {
    lineIdx: number;
    col: number;
    len: number;
};
type ConversationLine = {
    plain: string;
};
type HighlightMatch = ConversationMatch & {
    current?: boolean;
};
/**
 * Remove ANSI CSI/OSC control sequences from a string.
 *
 * This deliberately follows the escape-sequence grammar used by the terminal
 * renderer, rather than stripping only colour codes: hyperlinks and other
 * styled output must not affect plain-text search columns either.
 */
export declare function stripAnsi(text: string): string;
/**
 * Find all non-overlapping substring matches using smartcase semantics.
 * Lowercase queries match case-insensitively; queries containing uppercase
 * characters match case-sensitively.
 */
export declare function findConversationMatches(lines: ConversationLine[], query: string): ConversationMatch[];
/**
 * Inject match backgrounds into an ANSI-styled line without counting escape
 * sequences as plain-text columns. Existing foreground/style sequences are
 * copied verbatim, so syntax highlighting remains intact.
 */
export declare function highlightConversationLine(text: string, matches: HighlightMatch[], openMatch: string, openCurrent: string, close: string): string;
/** Find the first match at or after a line, wrapping to the first match. */
export declare function nearestConversationMatchAfter(matches: ConversationMatch[], lineIdx: number): number;
/** Find the last match at or before a line, wrapping to the last match. */
export declare function nearestConversationMatchBefore(matches: ConversationMatch[], lineIdx: number): number;
export {};
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