/** Returns the prompt prototype for a style (0 short, 1 medium, 2 long). */
export declare const prProto: (type: number) => string;
/** The `=` command prototype. */
export declare const eqProto: () => string;
/** The help prompt prototype. */
export declare const hProto: () => string;
/** The F command waiting prompt prototype. */
export declare const wProto: () => string;
/**
 * Stores a -P prompt definition, like less's opt__P: the first char
 * selects which prototype is changed.
 *
 * @param text - The raw -P answer (e.g. `s`, `m`, `M`, `=`, `h` prefix).
 */
export declare function setProto(text: string): void;
/**
 * Restores the built-in prototypes for a fresh pager run, like less's
 * init_prompt: more mode replaces the medium prompt with --More--.
 */
export declare function resetProtos(): void;
/**
 * Expands a prompt prototype string, like less's pr_expand.
 *
 * - `%x` escapes expand pager state (file name, line, percent, ...),
 *   `?x...:....` are conditionals ended by `.`, and `\` takes the next
 *   character literally.
 *
 * @param content - Full content lines.
 * @param proto - The prototype string.
 * @returns The expanded message.
 */
export declare function prExpand(content: string[], proto: string): string;
/**
 * Escapes shell metacharacters, like less's shell_quote on unix: each
 * metachar takes a backslash, a newline is surrounded by the -" quote
 * characters.
 */
export declare function shellQuote(name: string): string;
/** Expands LESSEDIT for the regular session through the full prompt engine. */
export declare function editCommand(content: string[]): string;
/**
 * Expands the edit-oriented prompt fields for a windowed file, whose
 * contents intentionally are not materialized into the regular file table.
 */
export declare function windowedEditCommand(filename: string, line: number | null): string;