[PATCH v1] kconfig: nconf: Keep position after jump search

[Jesse Taube <mr.bossman075@gmail.com>]

In this Menuconfig, pressing the key in the (#) prefix will jump
directly to that location. You will be returned to the current search
results after exiting this new menu.

In nconfig, exiting always returns to the top of the search output, not
to where the (#) was displayed on the search output screen.

This patch fixes that by saving the current position in the search.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230805034445.2508362-1-Mr.Bossman075@gmail.com/
Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>
---
 scripts/kconfig/nconf.c     |  3 ++-
 scripts/kconfig/nconf.gui.c | 12 +++++++++++-
 scripts/kconfig/nconf.h     |  1 +
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index 172dc8fdd3ef..536332286c2f 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -749,7 +749,7 @@ static void search_conf(void)
 	struct gstr res;
 	struct gstr title;
 	char *dialog_input;
-	int dres;
+	int dres, vscroll = 0, hscroll = 0;
 	bool again;
 
 	title = str_new();
@@ -790,6 +790,7 @@ static void search_conf(void)
 		res = get_relations_str(sym_arr, &head);
 		dres = show_scroll_win_ext(main_window,
 				"Search Results", str_get(&res),
+				&vscroll, &hscroll,
 				handle_search_keys, &data);
 		again = false;
 		if (dres >= '1' && dres <= '9') {
diff --git a/scripts/kconfig/nconf.gui.c b/scripts/kconfig/nconf.gui.c
index bf015895053c..a3f7c921d6c2 100644
--- a/scripts/kconfig/nconf.gui.c
+++ b/scripts/kconfig/nconf.gui.c
@@ -501,11 +501,12 @@ void show_scroll_win(WINDOW *main_window,
 		const char *title,
 		const char *text)
 {
-	(void)show_scroll_win_ext(main_window, title, (char *)text, NULL, NULL);
+	(void)show_scroll_win_ext(main_window, title, NULL, NULL, (char *)text, NULL, NULL);
 }
 
 /* layman's scrollable window... */
 int show_scroll_win_ext(WINDOW *main_window, const char *title, char *text,
+			int *vscroll, int *hscroll,
 			extra_key_cb_fn extra_key_cb, void *data)
 {
 	int res;
@@ -522,6 +523,11 @@ int show_scroll_win_ext(WINDOW *main_window, const char *title, char *text,
 	PANEL *panel;
 	bool done = false;
 
+	if (hscroll)
+		start_x = *hscroll;
+	if (vscroll)
+		start_y = *vscroll;
+
 	getmaxyx(stdscr, lines, columns);
 
 	/* find the widest line of msg: */
@@ -624,6 +630,10 @@ int show_scroll_win_ext(WINDOW *main_window, const char *title, char *text,
 			start_x = total_cols-text_cols;
 	}
 
+	if (hscroll)
+		*hscroll = start_x;
+	if (vscroll)
+		*vscroll = start_y;
 	del_panel(panel);
 	delwin(win);
 	refresh_all_windows(main_window);
diff --git a/scripts/kconfig/nconf.h b/scripts/kconfig/nconf.h
index 912f668c5772..ab836d582664 100644
--- a/scripts/kconfig/nconf.h
+++ b/scripts/kconfig/nconf.h
@@ -81,6 +81,7 @@ int dialog_inputbox(WINDOW *main_window,
 		const char *init, char **resultp, int *result_len);
 void refresh_all_windows(WINDOW *main_window);
 int show_scroll_win_ext(WINDOW *main_window, const char *title, char *text,
+			int *vscroll, int *hscroll,
 			extra_key_cb_fn extra_key_cb, void *data);
 void show_scroll_win(WINDOW *main_window,
 		const char *title,
-- 
2.40.0