/**
 * A single-line editor for the drawer prompt, the ⌃K filter and text forms
 * (operator-console/AC-40, operator-console/AC-42, operator-console/AC-46).
 *
 * Pure: a key in, the new line out. Ctrl-A and Ctrl-K are not editing keys here —
 * the drawer and the dashboard bind them (operator-console/AC-39, AC-50) — so Home
 * and End move to the ends, as do Ctrl-E and the arrows.
 *
 * @module
 */
import type { KeyName, LineState } from './model.js';
export declare const EMPTY_LINE: LineState;
export declare function lineOf(text: string): LineState;
/** A key that types: one printable character, never a control code. */
export declare function printable(key: KeyName): string | null;
/** The new line for `key`, or null when the editor does not use that key. */
export declare function editLine(line: LineState, key: KeyName): LineState | null;
/**
 * The line as drawn in `width` columns: the visible slice and the cursor's column in
 * it. A line longer than the field scrolls so the cursor stays in view.
 */
export declare function viewLine(line: LineState, width: number): {
    text: string;
    cursor: number;
};
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