/**
 * screen-buffer.ts — a lightweight VT100/xterm screen emulator.
 *
 * Full-screen TUI programs (vim, htop, pi, …) repaint regions of the screen
 * in place with cursor-addressing escape sequences. An append-only stream
 * buffer is nearly useless for reading them: the interesting content is the
 * CURRENT SCREEN STATE, not the raw byte stream. This class maintains a
 * cols×rows character grid fed from the session's output stream so callers
 * can take a rendered snapshot at any time (think `tmux capture-pane`).
 *
 * Supported (enough for real TUIs): cursor movement (CUP/CUU/CUD/CUF/CUB/
 * CNL/CPL/CHA/VPA), erase (ED/EL/ECH), insert/delete (ICH/DCH/IL/DL),
 * scrolling (SU/SD, DECSTBM scroll region, IND/RI/NEL), alternate screen
 * (?1049/?47/?1047), save/restore cursor (DECSC/DECRC, CSI s/u), tabs,
 * wide (CJK) characters, and OSC/DCS/APC/PM/SOS string skipping.
 *
 * It also auto-answers the terminal queries TUIs commonly block on when no
 * real terminal is present: DSR 6 (cursor position), DA1/DA2, XTWINOPS
 * 14/16/18 (sizes), and OSC 10/11 color queries.
 *
 * SGR attributes (colors/bold) are intentionally discarded — snapshots are
 * plain text for LLM consumption.
 *
 * This module MUST NOT import any platform SDK.
 */
export interface ScreenOptions {
    cols: number;
    rows: number;
    /** Callback used to answer terminal queries (written back to the app's stdin). */
    respond?: (data: string) => void;
}
/** Approximate wcwidth: 2 for common East-Asian wide ranges, 0 for combining. */
export declare function charWidth(cp: number): number;
export declare class TerminalScreen {
    cols: number;
    rows: number;
    /**
     * Count of screen-painting control operations seen (cursor addressing,
     * erase, scroll-region…). Heuristic signal that the program is a
     * full-screen TUI rather than a line-oriented REPL.
     */
    paintOps: number;
    private lines;
    private curX;
    private curY;
    private savedX;
    private savedY;
    private scrollTop;
    private scrollBottom;
    private altSaved;
    private respond;
    private state;
    private csiParams;
    private csiIntermediates;
    private oscBuf;
    private strEsc;
    constructor(opts: ScreenOptions);
    get altActive(): boolean;
    cursor(): {
        x: number;
        y: number;
    };
    private blankLine;
    /** Rendered plain-text snapshot of the current screen. */
    snapshot(): string;
    resize(cols: number, rows: number): void;
    reset(): void;
    feed(data: string): void;
    private feedGround;
    private putChar;
    private lineFeed;
    private reverseLineFeed;
    private scrollUp;
    private scrollDown;
    private feedEsc;
    private startCsi;
    private feedCsi;
    private dispatchCsi;
    private handleDecMode;
    private eraseDisplay;
    private eraseLine;
    private insertLines;
    private deleteLines;
    private insertChars;
    private deleteChars;
    private eraseChars;
    private feedString;
    private dispatchOsc;
}
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