Function buildCharToSegmentMap

src/ink/render-node-to-output.ts:195–204

* Build a mapping from each character position in the plain text to its segment index. * Returns an array where charToSegment[i] is the segment index for character i.

(segments: StyledSegment[])

 * Returns an array where charToSegment[i] is the segment index for character i.
 */
function buildCharToSegmentMap(segments: StyledSegment[]): number[] {
  const map: number[] = []
  for (let i = 0; i < segments.length; i++) {
    const len = segments[i]!.text.length
    for (let j = 0; j < len; j++) {
      map.push(i)
    }
  }
  return map
}

/**
 * Apply styles to wrapped text by mapping each character back to its original segment.