export declare const ASCII_REGEX: RegExp;
/** less's is_ansi_middle set ($LESSANSIMIDCHARS). */
export declare const ansiMidChars: () => string;
/** less's is_ansi_end set ($LESSANSIENDCHARS). */
export declare const ansiEndChars: () => string;
/** less's osc_ansi_chars ($LESSANSIOSCCHARS): extra OSC intro chars. */
export declare const ansiOscChars: () => string;
/**
 * A "designate a character set" escape: ESC, one of ( ) * +, then the
 * set's name. Not SGR, and less's ANSI rule cannot close it - its end
 * chars default to just "m" (line.c:164) - so it is not a sequence to
 * either engine. less never meets one in text because it keeps its
 * attributes beside the characters rather than in them; we inline
 * ours, and terminfo's sgr0 leads with "\E(B" on xterm, so anything
 * MEASURING our display text has to skip it or count three columns
 * that are not there.
 */
export declare const CHARSET_DESIGNATION_G: RegExp;
export declare let STYLE_REGEX: RegExp;
export declare let STYLE_REGEX_G: RegExp;
/**
 * A style sequence OR a charset designation, for the callers that lay
 * text out in COLUMNS. Both are zero-width, but only the first is a
 * sequence by less's rule - see CHARSET_DESIGNATION_G. Parsing of FILE
 * content keeps to STYLE_REGEX, which is less's rule exactly.
 */
export declare let STYLE_OR_CHARSET_G: RegExp;
/**
 * Rebuilds the sequence regexes from $LESSANSIMIDCHARS and
 * $LESSANSIENDCHARS, like init_line.
 */
export declare function initAnsiChars(): void;
export declare const CONSOLE_CLEAR = "\u001B[2J\u001B[H";
export declare let CURSOR_HOME: string;
export declare let CLEAR_LINE: string;
export declare let CLEAR_BELOW: string;
/**
 * less's auto_wrap and defer_wrap (screen.c:1531): termcap "am" and "xn".
 *
 * auto_wrap - the terminal moves to the next line by itself once a
 * character lands past the right margin. defer_wrap - it holds that
 * move until the NEXT character arrives (xterm's magic margin), so a
 * full-width row leaves the cursor parked on the last column.
 *
 * The pair decides how a full row ends (line.c:1523), and the three
 * answers really differ: without xenl a full row must be followed by
 * NOTHING, because the terminal has already wrapped - a newline there
 * costs a whole blank line, and the deferred-wrap nudge costs one too.
 * Both default to true when the terminal says nothing, which is xterm,
 * the same assumption every escape string above makes.
 */
export declare let AUTO_WRAP: boolean;
export declare let DEFER_WRAP: boolean;
export declare let CLEAR_SCREEN: string;
export declare let REVERSE_INDEX: string;
export declare const CURSOR_TO: (row: number, col: number) => string;
/** True while the pager owns a switchable alternate screen, like less
 *  testing sc_init and sc_deinit before it homes to the lower left. */
export declare let ON_ALTERNATE_SCREEN: boolean;
export declare let ALTERNATE_CONSOLE_ON: string;
export declare let ALTERNATE_CONSOLE_OFF: string;
export declare let KEYPAD_ON: string;
export declare let KEYPAD_OFF: string;
export declare let MOUSE_ON: string;
export declare let MOUSE_OFF: string;
export declare let MOUSE_SGR_ON: string;
export declare let MOUSE_SGR_OFF: string;
export declare let BRACKETED_PASTE_ON: string;
export declare let BRACKETED_PASTE_OFF: string;
export declare let TERMINAL_SUSPEND: string;
export declare let TERMINAL_RESUME: string;
export declare let VISUAL_BELL: string | null;
export declare let STYLE_RESET: string;
/**
 * less's color reset, which is NOT the attribute one.
 *
 * A colored run ends with a literal "\033[m" (line.c:1445) — less writes
 * the bytes itself rather than asking terminfo. Attribute runs end
 * with sgr0 instead, which on xterm carries a "\E(B" charset
 * designation in front. Using sgr0 for a color left that designation
 * in the message text, where nothing can recognise it as a sequence
 * (less's ANSI rule wants an END char, by default only "m") — so its
 * three bytes counted as printing columns and the cursor parked three
 * columns right of every message under --use-color.
 */
export declare const COLOR_RESET = "\u001B[m";
export declare let INVERSE_ON: string;
export declare let INVERSE_OFF: string;
export declare let BOLD_ON: string;
export declare let BOLD_OFF: string;
export declare let UNDERLINE_ON: string;
export declare let UNDERLINE_OFF: string;
export declare let END_MARKER: string;
/** Rebuilds every terminal string that this pager consumes. */
export declare function initTerminalCapabilities(): void;