Function colorToString

src/ink/Ansi.tsx:196–207

* Convert termio's Color to the string format used by Ink.

(color: TermioColor)

 * Convert termio's Color to the string format used by Ink.
 */
function colorToString(color: TermioColor): Color | undefined {
  switch (color.type) {
    case 'named':
      return NAMED_COLOR_MAP[color.name] as Color;
    case 'indexed':
      return `ansi256(${color.index})` as Color;
    case 'rgb':
      return `rgb(${color.r},${color.g},${color.b})` as Color;
    case 'default':
      return undefined;
  }
}

/**
 * Check if two SpanProps are equal for merging.