nano

commit 02f1fec497b0aa247f124a9ad2cd37e4ee3c824c
parent a102e45e90f4e443de0767a94271100195a12c96
Author: Benno Schulenberg <bensberg@telfort.nl>
Date:   Sun,  3 Jan 2021 13:52:31 +0100

prompt: restore a workaround for a cursor misplacement bug in ncurses

When making small movements in the lower right corner, ncurses can
get confused about where the cursor actually is -- a double-width
character seems to throw its calculations off.

This addresses https://savannah.gnu.org/bugs/?59808.

Bug existed since version 5.4, commit 39705c60.

Diffstat:
M
src/prompt.c
 | 
6
++++++

1 file changed, 6 insertions(+), 0 deletions(-)
diff --git a/src/prompt.c b/src/prompt.c
@@ -407,6 +407,12 @@ void draw_the_promptbar(void)
 
 	wattroff(bottomwin, interface_color_pair[PROMPT_BAR]);
 
+	/* Work around a cursor-misplacement bug -- https://sv.gnu.org/bugs/?59808. */
+	if (ISSET(NO_HELP)) {
+		wmove(bottomwin, 0, 0);
+		wrefresh(bottomwin);
+	}
+
 	/* Place the cursor at the right spot. */
 	column = base + wideness(answer, typing_x);
 	wmove(bottomwin, 0, column - get_statusbar_page_start(base, column));