import { Actions } from "../state/interfaces";
/**
 * A #command binding: the pager action, an optional canonical key for
 * key-sensitive actions (`-`/`_`), and the "extra" input string fed
 * after the action, like lesskey's A_EXTRA.
 */
interface UserBinding {
    action: Actions | undefined;
    key?: string;
    extra?: string;
}
export declare const LESS_VERSION = 707;
/**
 * One lesskey a session loaded, in whatever shape it arrived.
 *
 * The loader takes up to six at once and merges them, so "the current
 * lesskey" is a list, not a file. --edit-lesskey needs to know which
 * ones were real to put them all in front of the user.
 */
export interface LesskeyForm {
    /** How it was stored: editable text, compiled bytes, or a variable. */
    kind: 'source' | 'binary' | 'content';
    /** The file path, or the variable name for a content form. */
    origin: string;
    /** System-wide rather than the user's own. */
    system: boolean;
}
/** The lesskey forms this session loaded, in ladder order. */
export declare const lesskeyForms: () => LesskeyForm[];
/**
 * Notes a lesskey that loaded. The ladder records its own; the option
 * scan records what the command line added, since that arrives after
 * loadLesskey has already run (less's init_cmds precedes scan_option).
 */
export declare function recordLesskeyForm(form: LesskeyForm): void;
/** The #command binding for a key sequence, if the user made one. */
export declare const userBinding: (seq: string) => UserBinding | undefined;
/**
 * The sequence a user bound to an action, for the two that are read as
 * the INTRODUCER of a longer report rather than matched whole: less's
 * A_X11MOUSE_IN and A_X116MOUSE_IN, which lesskey names "mouse" and
 * "mouse6" (lesskey_parse.c:72). Everything after the introducer is
 * the report's own bytes, so the dispatcher has to know the prefix.
 */
export declare function userBoundTo(action: Actions): string | undefined;
/** True when #stop discards the built-in key bindings. */
export declare const userStop: () => boolean;
/**
 * Resolves a #line-edit binding to the built-in editing key it stands
 * for, leaving unbound keys alone.
 */
export declare const translateEditKey: (key: string) => string;
/** Forgets all lesskey state for a fresh session. */
export declare function resetLesskey(): void;
export declare function loadLesskey(quiet?: boolean): void;
/**
 * Parses a compiled lesskey file, like decode.c's new_lesskey and
 * old_lesskey: the new format wraps c/e/v sections between the
 * "\0M+G" and "End" magics; the old format is one raw command table.
 * Invalid files are ignored silently, like less returning -1.
 */
export declare function parseLesskeyBinary(buf: Buffer, system?: boolean): void;
/**
 * Finds the lesskey source file, like add_hometable's lookup.
 */
export declare function lesskeyFile(): string | null;
/**
 * Parses a lesskey source, like lesskey_parse.c's parse_lesskey:
 * #command, #line-edit and #env switch sections, #stop discards the
 * built-in bindings, #version guards a line, and other #-lines are
 * comments.
 *
 * @param text - The lesskey source.
 * @param filename - Name reported in parse errors.
 */
export declare function parseLesskey(text: string, filename: string, system?: boolean): number;
/**
 * Parses inline lesskey source, like less's parse_lesskey_content
 * (lesskey_parse.c:738): lines end at a newline OR a semicolon, a
 * backslash escapes a literal semicolon, and a line hitting the
 * 1023-char cap SPLITS - the remainder becomes the next line.
 *
 * @param text - The --lesskey-content / $LESSKEY_CONTENT value.
 */
export declare function parseLesskeyContent(text: string, system?: boolean): number;
/**
 * True when more characters could complete a longer binding, like
 * cmd_search answering A_PREFIX.
 */
export declare function userIsPrefix(seq: string): boolean;
export {};