/**
 * Line-input state shared by the `!`, `#`, `|`, `s` (log file) and `+`
 * prompts.
 */
/**
 * Session shell-command history shared by `!`, `#` and `|`, like
 * less's ml_shell; persisted in the history file's .shell section.
 */
export declare let shellHistory: string[];
/** Replaces the shell history (history file load). */
export declare function setShellHistory(entries: string[]): void;
/**
 * Records an accepted shell command, like cmd_addhist for ml_shell.
 */
export declare function addShellHistory(text: string): void;
/** Registers the --autosave history file writer. */
export declare function onShellAutosave(fn: () => void): void;
/** Registers the new-entry recorder. */
export declare function onShellHistRecord(fn: (entry: string) => void): void;
/** Registers the history modified-flag raiser (less's cmd_accept). */
export declare function onShellHistTouch(fn: () => void): void;
export declare const miscInput: {
    pending: "" | "!" | "#" | "|" | "s" | "S" | "+";
    text: string;
};
/**
 * Pending `|mark: ` request and the collected mark character.
 */
export declare const pipeMark: {
    pending: boolean;
    char: string;
    /** Second mark of the || form; empty for the single-mark form. */
    char2: string;
    /** Which || mark is being read ('' = single-mark prompt). */
    stage: "" | "first" | "second";
    /** ^N toggled the prompt into line-number entry (v707). */
    lineMode: boolean;
    /** Digits typed in line-number mode. */
    num: string;
    /** Resolved rows: [first] or [first, second]. */
    rows: number[];
    /** The same marks as less POSITIONs, when the input is seekable. */
    positions: (number | undefined)[];
};
/**
 * Pending log file overwrite query (`Warning: "x" exists; ...`).
 */
export declare const overwrite: {
    pending: boolean;
    file: string;
    reminder: boolean;
};
/** The active log file name for `_o` queries, empty when unset. */
export declare const logFileName: () => string;
/**
 * Forgets session state (log file, shell and first commands, prompts)
 * for a fresh pager run.
 */
export declare function resetMisc(): void;
/**
 * Stores the log file named by -o/-O in $LESS, like opt_o at INIT
 * setting namelogfile.
 *
 * @param name - The log file name, kept unexpanded like less.
 * @param force - True for -O: overwrite without asking.
 */
export declare function setStartupLogFile(name: string, force: boolean): void;
/**
 * Opens the $LESS-named log file once the session starts, like less's
 * use_logfile when the input pipe opens: regular files are not logged,
 * an existing file raises the overwrite query, and success is silent.
 *
 * @returns The pending log, or null when nothing should be logged.
 */
export declare function takeStartupLog(): {
    name: string;
    force: boolean;
} | null;
/**
 * Appends newly streamed lines to the active log, like less's ch.c
 * writing the log file as each buffer is read from the pipe.
 *
 * @param lines - The decoded lines just added to the content.
 */
export declare function appendLogLines(lines: string[]): void;
/**
 * Opens one of the line-input prompts (`!`, `|`, `s`, `+`).
 *
 * @param kind - Which prompt to open.
 */
export declare function startMiscInput(kind: '!' | '#' | '|' | 's' | 'S' | '+'): void;
/** The prompt label for each misc input kind, like start_mca's. */
export declare function miscPromptLabel(kind: '!' | '#' | '|' | 's' | 'S' | '+'): string;
/**
 * Handles a key at a misc line-input prompt, examine-style.
 *
 * @param key - Raw key input.
 * @returns `run` to execute, `pending` or `cancel`.
 */
export declare function miscInputKey(key: string): 'run' | 'pending' | 'cancel';
/**
 * Opens the log file prompt (`s`, `-o`, `-O`), refusing up front when
 * the input is not piped-in content, like less checking CH_CANSEEK.
 *
 * @param force - True for `-O`: overwrite unconditionally.
 */
export declare function startLogFile(force: boolean): void;
/**
 * Opens the `|mark: ` prompt for the pipe command.
 */
export declare function startPipe(): void;
/**
 * Handles the mark character following `|`.
 *
 * - The mark resolves immediately, like less's get_pipe_pos: an unset
 *   or invalid mark reports and aborts before the command prompt.
 *
 * @param content - Full content lines.
 * @param key - Raw key input.
 * @returns True when the mark was taken and the command prompt opens.
 */
export declare function pipeMarkKey(content: string[], key: string): boolean;
/**
 * Resolves a `!` prompt answer into the command to run, like less:
 * `!!` repeats the previous command, `%` and `#` expand to filenames,
 * a leading `^P` suppresses the done message.
 *
 * @param text - The raw prompt answer.
 * @returns The command and the done message (null to suppress).
 */
export declare function shellCommand(text: string): {
    cmd: string;
    doneMsg: string | null;
};
/**
 * Stores the command replayed on each newly examined file (`+cmd`).
 *
 * - Leading `+` signs and spaces are skipped; empty input clears it.
 *
 * @param text - The raw prompt answer.
 */
export declare function setFirstCmd(text: string): void;
/**
 * Returns the `+cmd` command, or an empty string when unset.
 */
export declare function getFirstCmd(): string;
/**
 * Stores the --cmd command, like less's opt_first_cmd_at_prompt.
 */
export declare function setCmdAtPrompt(text: string): void;
/**
 * Consumes the --cmd command at the first prompt, like less's prompt()
 * ungetting first_cmd_at_prompt once and clearing it.
 */
export declare function takeCmdAtPrompt(): string;
/**
 * Resolves an `s`/`-o` prompt answer into a log file action.
 *
 * - Only piped-in content can be logged, like less.
 *
 * @param text - The raw prompt answer.
 * @param force - True for `-O`: overwrite unconditionally, never ask.
 * @returns `write` to save, `ask` when the overwrite query opened, or
 *          null when nothing should happen (message already set).
 */
export declare function logFileTarget(text: string, force?: boolean): 'write' | 'ask' | null;
/**
 * Handles the answer to the log file overwrite query.
 *
 * @param key - Raw key input.
 * @returns The chosen action; unrecognized keys re-ask with less's
 *          reminder prompt.
 */
export declare function overwriteKey(key: string): 'overwrite' | 'append' | 'none' | 'quit' | 'pending';
/**
 * Writes the paged content to the log file.
 *
 * @param content - Full content lines.
 * @param append - True to append instead of overwriting.
 * @param quiet - True to skip the success report, like less opening a
 *                $LESS-named log file at startup.
 */
export declare function writeLogFile(content: string[], append: boolean, quiet?: boolean): void;
/**
 * Reports the pager's version (`V`), like less's dispversion.
 */
export declare function versionMessage(): void;
/**
 * Prints the version to stdout for -V in $LESS, like less's opt__V at
 * INIT printing and quitting before the pager starts.
 */
export declare function printVersion(): void;