nano

commit 5cfb74650d3ae847a23ee37669292b9b58e502ae
parent 8cd6aa0a322432d400d2b5d8203aef6a1b5c282f
Author: Benno Schulenberg <bensberg@telfort.nl>
Date:   Wed, 26 Jun 2019 12:17:29 +0200

scrolling: don't overscroll when the edit window has just one row

If the edit window consists of a single row, then the do_down() call
has already brought the desired line or chunk into view -- no attempt
should then be made to scroll the screen further.

This fixes https://savannah.gnu.org/bugs/?56553.

Bug existed since version 2.9.6, commit 0d9080a2.

Diffstat:
M
src/move.c
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/move.c b/src/move.c
@@ -554,12 +554,12 @@ void do_scroll_down(void)
 	if (openfile->current_y == 0)
 		do_down();
 
-	if (openfile->edittop->next != NULL
+	if (editwinrows > 1 && (openfile->edittop->next != NULL
 #ifndef NANO_TINY
 				|| chunk_for(openfile->firstcolumn, openfile->edittop) <
 					number_of_chunks_in(openfile->edittop)
 #endif
-										)
+										))
 		edit_scroll(FORWARD);
 }
 #endif