get-visible-position-range

Returns the range of positions which are currently visible to the user.

The result is only valid when the buffer is viewed (see Basic Organization). Calling this method may force the recalculation of location information, even if the buffer currently has delayed refreshing (see refresh-delayed?).

• (send a-wx:media-edit get-visible-position-range start end) -> void
      start : boxed small integer or null
      end : boxed small integer or null

  The start box is filled with first position visible to the user, unless start is null. The end box is filled with last position visible to the user, unless end is null.