[PATCH] kconfig: show number of search results in search UI

[Zuo An <zuoan.penguin@gmail.com>]

When searching for symbols in nconfig/menuconfig, the search
results popup will now display a count of the results
in the title bar, e.g. "Search Results (42)".

This helps the user to gauge the number of matches quickly and
refine their search if needed, rather than having to scroll down
by an indefinite amount (especially for nconfig's UI which lacks
a display of the scrolling progress).

Signed-off-by: Zuo An <zuoan.penguin@gmail.com>
---
 scripts/kconfig/lkc_proto.h |  2 +-
 scripts/kconfig/mconf.c     | 10 ++++++++--
 scripts/kconfig/nconf.c     | 10 ++++++++--
 scripts/kconfig/qconf.cc    |  2 +-
 scripts/kconfig/symbol.c    |  4 +++-
 5 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/scripts/kconfig/lkc_proto.h b/scripts/kconfig/lkc_proto.h
index 8914b4e8f2a8..224acc142769 100644
--- a/scripts/kconfig/lkc_proto.h
+++ b/scripts/kconfig/lkc_proto.h
@@ -21,7 +21,7 @@ bool conf_errors(void);
 struct symbol * sym_lookup(const char *name, int flags);
 struct symbol * sym_find(const char *name);
 void print_symbol_for_listconfig(struct symbol *sym);
-struct symbol ** sym_re_search(const char *pattern);
+struct symbol ** sym_re_search(const char *pattern, int *sym_cnt);
 const char * sym_type_name(enum symbol_type type);
 void sym_calc_value(struct symbol *sym);
 bool sym_dep_errors(void);
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index b8b7bba84a65..f37c3f8e1f4d 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -384,8 +384,10 @@ static void show_help(struct menu *menu)
 static void search_conf(void)
 {
 	struct symbol **sym_arr;
+	int sym_cnt;
 	struct gstr res;
 	struct gstr title;
+	struct gstr res_title;
 	char *dialog_input;
 	int dres, vscroll = 0, hscroll = 0;
 	bool again;
@@ -422,7 +424,7 @@ static void search_conf(void)
 	stpart.text = str_get(&sttext);
 	list_add_tail(&stpart.entries, &trail);
 
-	sym_arr = sym_re_search(dialog_input);
+	sym_arr = sym_re_search(dialog_input, &sym_cnt);
 	do {
 		LIST_HEAD(head);
 		struct search_data data = {
@@ -433,9 +435,13 @@ static void search_conf(void)
 		jump_key_char = 0;
 		res = get_relations_str(sym_arr, &head);
 		set_subtitle();
-		dres = show_textbox_ext("Search Results", str_get(&res), 0, 0,
+
+		res_title = str_new();
+		str_printf(&res_title, "Search Results (%d)", sym_cnt);
+		dres = show_textbox_ext(str_get(&res_title), str_get(&res), 0, 0,
 					&vscroll, &hscroll,
 					handle_search_keys, &data);
+
 		again = false;
 		if (dres >= '1' && dres <= '9') {
 			assert(data.target != NULL);
diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index 521700ed7152..e3b25940b931 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -700,8 +700,10 @@ static int do_exit(void)
 static void search_conf(void)
 {
 	struct symbol **sym_arr;
+	int sym_cnt;
 	struct gstr res;
 	struct gstr title;
+	struct gstr res_title;
 	char *dialog_input;
 	int dres, vscroll = 0, hscroll = 0;
 	bool again;
@@ -732,7 +734,7 @@ static void search_conf(void)
 	if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
 		dialog_input += strlen(CONFIG_);
 
-	sym_arr = sym_re_search(dialog_input);
+	sym_arr = sym_re_search(dialog_input, &sym_cnt);
 
 	do {
 		LIST_HEAD(head);
@@ -742,10 +744,14 @@ static void search_conf(void)
 		};
 		jump_key_char = 0;
 		res = get_relations_str(sym_arr, &head);
+
+		res_title = str_new();
+		str_printf(&res_title, "Search Results (%d)", sym_cnt);
 		dres = show_scroll_win_ext(main_window,
-				"Search Results", str_get(&res),
+				str_get(&res_title), str_get(&res),
 				&vscroll, &hscroll,
 				handle_search_keys, &data);
+
 		again = false;
 		if (dres >= '1' && dres <= '9') {
 			assert(data.target != NULL);
diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index b02ead7a3f98..8f51dc55226d 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1245,7 +1245,7 @@ void ConfigSearchWindow::search(void)
 	list->clear();
 	info->clear();
 
-	result = sym_re_search(editField->text().toLatin1());
+	result = sym_re_search(editField->text().toLatin1(), nullptr);
 	if (!result)
 		return;
 	for (p = result; *p; p++) {
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 7e81b3676ee9..31f927bd563a 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -1020,7 +1020,7 @@ static int sym_rel_comp(const void *sym1, const void *sym2)
 	return strcmp(s1->sym->name, s2->sym->name);
 }
 
-struct symbol **sym_re_search(const char *pattern)
+struct symbol **sym_re_search(const char *pattern, int *sym_cnt)
 {
 	struct symbol *sym, **sym_arr = NULL;
 	struct sym_match *sym_match_arr = NULL;
@@ -1065,6 +1065,8 @@ struct symbol **sym_re_search(const char *pattern)
 			sym_arr[i] = sym_match_arr[i].sym;
 		sym_arr[cnt] = NULL;
 	}
+	if (sym_cnt)
+		*sym_cnt = cnt;
 sym_re_search_free:
 	/* sym_match_arr can be NULL if no match, but free(NULL) is OK */
 	free(sym_match_arr);
-- 
2.56.0