scroll-line-location

Maps a vertical scroll position to a vertical location within the editor.

For text% objects: Calling this method may force the recalculation of location information, even if the editor currently has delayed refreshing (see refresh-delayed?). If the editor is not displayed and the editor has a maximum width, line breaks are calculated as for line-start-position.

• (send an-editor scroll-line-location pos) -> non-negative real number
      pos : exact integer