Function applyPositionedHighlight

src/ink/render-to-screen.ts:212–231

(
  screen: Screen,
  stylePool: StylePool,
  positions: MatchPosition[],
  rowOffset: number,
  currentIdx: number,
)

 *  Positions are message-relative (row 0 = message top). rowOffset =
 *  message's current screen-top (lo). Clips outside [0, height). */
export function applyPositionedHighlight(
  screen: Screen,
  stylePool: StylePool,
  positions: MatchPosition[],
  rowOffset: number,
  currentIdx: number,
): boolean {
  if (currentIdx < 0 || currentIdx >= positions.length) return false
  const p = positions[currentIdx]!
  const row = p.row + rowOffset
  if (row < 0 || row >= screen.height) return false
  const transform = (id: number) => stylePool.withCurrentMatch(id)
  const rowOff = row * screen.width
  for (let col = p.col; col < p.col + p.len; col++) {
    if (col < 0 || col >= screen.width) continue
    const cell = cellAtIndex(screen, rowOff + col)
    setCellStyleId(screen, col, row, transform(cell.styleId))
  }
  return true
}