Function rowHasVisibleContentInRange

src/ink/log-update.ts:1567–1609

(
  frame: Frame,
  row: number,
  fromX: number,
  toX: number,
)

}

function rowHasVisibleContentInRange(
  frame: Frame,
  row: number,
  fromX: number,
  toX: number,
): boolean {
  if (row < 0 || row >= frame.screen.height || fromX >= toX) {
    return false
  }

  const { width, cells, charPool, hyperlinkPool } = frame.screen
  const rowStart = row * width
  let lastRenderedStyleId = -1
  const scratchCell: Cell = {
    char: ' ',
    styleId: 0,
    width: CellWidth.Narrow,
    hyperlink: undefined,
  }

  for (let x = 0; x < toX; x += 1) {
    if (
      !visibleCellAtIndexInto(
        cells,
        charPool,
        hyperlinkPool,
        rowStart + x,
        lastRenderedStyleId,
        scratchCell,
      )
    ) {
      continue
    }
    const cell = scratchCell

    if (x >= fromX) {
      return true
    }
    lastRenderedStyleId = cell.styleId
  }

  return false
}

function shouldOverwriteSkippedRepaintSpace(
  previousFrame: Frame | undefined,