ui/ncurses: Improve update handling in nested screens

Several screens in petitboot-nc require an update if a config or sysinfo
update is received. However if those screens exist but are not the
current screen they will incorrectly try to draw to the screen.

Where the currently active screen is a textscreen (eg. a help screen)
the update is delayed until after the screen is exited.

In the particular case of nc-config where the current screen can be an
nc-subset screen, the nc-subset screen is exited immediately so the
update can be performed, since the nc-subset screen depends on the
information in the previous screen.

Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/ui/ncurses/nc-subset.c b/ui/ncurses/nc-subset.c
index f38e394..0faed3b 100644
--- a/ui/ncurses/nc-subset.c
+++ b/ui/ncurses/nc-subset.c
@@ -62,6 +62,12 @@ struct nc_scr *subset_screen_return_scr(struct subset_screen *screen)
 	return screen->return_scr;
 }
 
+void subset_screen_update(struct subset_screen *screen)
+{
+	pb_debug("Exiting subset due to update\n");
+	return screen->on_exit(screen->cui);
+}
+
 static struct subset_screen *subset_screen_from_scr(struct nc_scr *scr)
 {
 	struct subset_screen *subset_screen;