Function makeFrame

src/ink/logUpdateFlickerRegression.test.ts:71–132

({
  lines,
  viewportWidth = 10,
  viewportHeight,
  screenHeight = lines.length,
  cursorY = screenHeight,
  cells = [],
}: {
  lines: string[]
  viewportWidth?: number
  viewportHeight: number
  screenHeight?: number
  cursorY?: number
  cells?: Array<{
    x: number
    y: number
    char: string
    styleId?: number
    width?: CellWidth
  }>
})

}

function makeFrame({
  lines,
  viewportWidth = 10,
  viewportHeight,
  screenHeight = lines.length,
  cursorY = screenHeight,
  cells = [],
}: {
  lines: string[]
  viewportWidth?: number
  viewportHeight: number
  screenHeight?: number
  cursorY?: number
  cells?: Array<{
    x: number
    y: number
    char: string
    styleId?: number
    width?: CellWidth
  }>
}): Frame {
  const screen = createScreen(
    viewportWidth,
    screenHeight,
    stylePool,
    charPool,
    hyperlinkPool,
  )

  for (let y = 0; y < lines.length; y += 1) {
    const line = lines[y] ?? ''
    for (let x = 0; x < line.length; x += 1) {
      setCellAt(screen, x, y, {
        char: line[x]!,
        styleId: stylePool.none,
        width: CellWidth.Narrow,
        hyperlink: undefined,
      })
    }
  }
  for (const cell of cells) {
    setCellAt(screen, cell.x, cell.y, {
      char: cell.char,
      styleId: cell.styleId ?? stylePool.none,
      width: cell.width ?? CellWidth.Narrow,
      hyperlink: undefined,
    })
  }

  return {
    screen,
    viewport: {
      width: viewportWidth,
      height: viewportHeight,
    },
    cursor: {
      x: 0,
      y: cursorY,