Function ensureCursorVisible

ensureCursorVisible(
    scrollTop: number,
    cursor: CursorPosition,
    viewportHeight: number,
): number
Compute scroll position to ensure cursor is visible.
Parameters
- scrollTop: number
  Current scroll position
- cursor: CursorPosition
  Cursor position
- viewportHeight: number
  Visible viewport height in lines
Returns number
Adjusted scroll position
- Defined in core/src/widgets/codeEditor.ts:473