/**
 * Colour and visible width for the watch view (colorful-autopilot-watch/AC-11,
 * colorful-autopilot-watch/AC-12, colorful-autopilot-watch/AC-14).
 *
 * The few escape codes are written by hand rather than taken from a colour
 * library: the watch already wrote its cursor codes by hand, and one more runtime
 * dependency is one more package every install fetches (requirements Q2).
 *
 * @module
 */
/** Columns a line takes on screen: code points, with escape codes not counted. */
export declare function visibleWidth(s: string): number;
/**
 * Cut to `max` visible columns, ending in `…`. Escape codes are copied whole and
 * never counted, so a coloured line is cut only when its text is too wide, and a
 * cut line ends with the colour reset so it cannot bleed into the next.
 */
export declare function cutVisible(s: string, max: number): string;
/** Pad with spaces to `width` visible columns. */
export declare function padVisible(s: string, width: number): string;
/** Plain text wrapped on spaces to `width`; a word longer than a line is split. Never empty. */
export declare function wrapText(text: string, width: number): string[];
export type Hue = 'red' | 'green' | 'yellow' | 'blue' | 'magenta' | 'cyan' | 'grey';
export interface Paint {
    on: boolean;
    bold(s: string): string;
    dim(s: string): string;
    fg(hue: Hue, s: string): string;
    /** Black bold text on `hue`: dark text on a light ground reads on dark and light terminals alike. */
    badge(hue: Hue, s: string): string;
}
/** Off, every function returns its text unchanged (colorful-autopilot-watch/AC-12). */
export declare function paint(on: boolean): Paint;
/** Colour only on a terminal, and never when `NO_COLOR` is set to anything (no-color.org). */
export declare function colourWanted(tty: boolean, env: NodeJS.ProcessEnv): boolean;
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