Function computeOffsetFromCursor

pages/probe.ts:548–560

(prepared: PreparedTextWithSegments, cursor: { segmentIndex: number, graphemeIndex: number })

}

function computeOffsetFromCursor(prepared: PreparedTextWithSegments, cursor: { segmentIndex: number, graphemeIndex: number }): number {
  let offset = 0
  for (let i = 0; i < cursor.segmentIndex; i++) offset += prepared.segments[i]!.length
  if (cursor.graphemeIndex === 0 || cursor.segmentIndex >= prepared.segments.length) return offset

  let graphemeIndex = 0
  for (const grapheme of graphemeSegmenter.segment(prepared.segments[cursor.segmentIndex]!)) {
    if (graphemeIndex >= cursor.graphemeIndex) break
    offset += grapheme.segment.length
    graphemeIndex++
  }
  return offset
}

function classifyBreakMismatch(contentWidth: number, ours: ProbeLine | undefined, browser: ProbeLine | undefined): string {
  if (!ours || !browser) return 'line-count mismatch after an earlier break shift'