Function mainScreenViewportRepaintFromHome

src/ink/log-update.ts:1067–1094

(
  frame: Frame,
  stylePool: StylePool,
  previousFrame?: Frame,
  options?: {
    clearRowsBeforeWrite?: boolean
    clearViewportBeforeWrite?: boolean
    forceClearViewportRemainder?: boolean
  },
)

}

function mainScreenViewportRepaintFromHome(
  frame: Frame,
  stylePool: StylePool,
  previousFrame?: Frame,
  options?: {
    clearRowsBeforeWrite?: boolean
    clearViewportBeforeWrite?: boolean
    forceClearViewportRemainder?: boolean
  },
): RenderOutput {
  const visibleFrame = clipMainScreenFrameToVisibleRows(frame, stylePool)
  const visiblePreviousFrame = previousFrame
    ? clipMainScreenFrameToVisibleRows(previousFrame, stylePool)
    : undefined
  const repaintPreviousFrame = options?.clearViewportBeforeWrite
    ? undefined
    : visiblePreviousFrame

  return {
    diff: fullViewportRepaintFromHome(
      visibleFrame,
      stylePool,
      repaintPreviousFrame,
      options,
    ),
    physicalFrame: visibleFrame,
  }
}

function cloneFrameForMutation(frame: Frame, stylePool: StylePool): Frame {
  const source = frame.screen