bindings: make ^Q start a backward search also in the file browser

This makes the four search keystrokes (^W/^Q/M-W/M-Q) available in
all three areas of nano: editor, help viewer, and file browser.

src/browser.c

@@ -166,9 +166,9 @@ char *do_browser(char *path)
 			say_there_is_no_help();
 #endif
 		} else if (func == do_search_forward) {
-			do_filesearch();
+			do_filesearch(FORWARD);
-		} else if (func == do_research) {
+		} else if (func == do_search_backward) {
-			do_fileresearch(FORWARD);
+			do_filesearch(BACKWARD);
 		} else if (func == do_findprevious) {
 			do_fileresearch(BACKWARD);
 		} else if (func == do_findnext) {
@@ -657,10 +657,11 @@ void browser_select_dirname(const char *needle)
 	}
 }
 
-/* Prepare the prompt and ask the user what to search for.  Return -2
+/* Prepare the prompt and ask the user what to search for.  If forwards is
+ * TRUE, search forward in the list; otherwise, search backward.  Return -2
  * for a blank answer, -1 for Cancel, 0 when we have a string, and a
  * positive value when some function was run. */
-int filesearch_init(void)
+int filesearch_init(bool forwards)
 {
 	char *thedefault;
 	int response;
@@ -679,7 +680,8 @@ int filesearch_init(void)
 
 	/* Now ask what to search for. */
 	response = do_prompt(FALSE, FALSE, MWHEREISFILE, NULL, &search_history,
-						browser_refresh, "%s%s", _("Search"), thedefault);
+						browser_refresh, "%s%s%s", _("Search"),
+						!forwards ? _(" [Backwards]") : "", thedefault);
 	free(thedefault);
 
 	/* If only Enter was pressed but we have a previous string, it's okay. */
@@ -752,11 +754,12 @@ void findfile(const char *needle, bool forwards)
 	selected = looking_at;
 }
 
-/* Search for a filename. */
+/* Search for a filename.  If forwards is TRUE, search forward in the list;
-void do_filesearch(void)
+ * otherwise, search backward.*/
+void do_filesearch(bool forwards)
 {
 	/* If the user cancelled or jumped to first or last file, don't search. */
-	if (filesearch_init() != 0)
+	if (filesearch_init(forwards) != 0)
 		return;
 
 	/* If answer is now "", copy last_search into answer. */
@@ -771,7 +774,7 @@ void do_filesearch(void)
 		update_history(&search_history, answer);
 #endif
 
-	findfile(answer, TRUE);
+	findfile(answer, forwards);
 }
 
 /* Search again without prompting for the last given search string,

src/global.c

@@ -503,6 +503,7 @@ void shortcut_init(void)
 {
 	const char *readfile_tag = N_("Read File");
 	const char *whereis_tag = N_("Where Is");
+	const char *wherewas_tag = N_("Where Was");
 	const char *replace_tag = N_("Replace");
 	const char *gotoline_tag = N_("Go To Line");
 	const char *prevline_tag = N_("Prev Line");
@@ -533,7 +534,8 @@ void shortcut_init(void)
 	const char *wherewas_gist =
 		N_("Search backward for a string or a regular expression");
 #ifdef ENABLE_BROWSER
-	const char *browserwhereis_gist = N_("Search for a string");
+	const char *browserwhereis_gist = N_("Search forward for a string");
+	const char *browserwherewas_gist = N_("Search backward for a string");
 	const char *browserrefresh_gist = N_("Refresh the file list");
 #ifndef NANO_TINY
 	const char *browserlefthand_gist = N_("Go to lefthand column");
@@ -738,12 +740,6 @@ void shortcut_init(void)
 		replace_tag, WITHORSANS(replace_gist), TOGETHER, NOVIEW);
 
 #ifdef ENABLE_BROWSER
-	add_to_funcs(do_search_forward, MBROWSER,
-		whereis_tag, WITHORSANS(browserwhereis_gist), TOGETHER, VIEW);
-
-	add_to_funcs(do_research, MBROWSER,
-		whereisnext_tag, WITHORSANS(whereisnext_gist), BLANKAFTER, VIEW);
-
 	add_to_funcs(goto_dir_void, MBROWSER,
 		N_("Go To Dir"), WITHORSANS(gotodir_gist), TOGETHER, VIEW);
 
@@ -841,7 +837,13 @@ void shortcut_init(void)
 		N_("Save"), WITHORSANS(savefile_gist), BLANKAFTER, NOVIEW);
 #endif
 
-	add_to_funcs(do_search_backward, MMAIN|MHELP|MBROWSER,
+#ifdef ENABLE_BROWSER
+	add_to_funcs(do_search_forward, MBROWSER,
+		whereis_tag, WITHORSANS(browserwhereis_gist), TOGETHER, VIEW);
+	add_to_funcs(do_search_backward, MBROWSER,
+		wherewas_tag, WITHORSANS(browserwherewas_gist), TOGETHER, VIEW);
+#endif
+	add_to_funcs(do_search_backward, MMAIN|MHELP,
 		/* TRANSLATORS: This starts a backward search. */
 		N_("Where Was"), WITHORSANS(wherewas_gist), TOGETHER, VIEW);
 	add_to_funcs(do_findprevious, MMAIN|MHELP|MBROWSER,

src/proto.h

@@ -190,7 +190,7 @@ void read_the_list(const char *path, DIR *dir);
 functionptrtype parse_browser_input(int *kbinput);
 void browser_refresh(void);
 void browser_select_dirname(const char *needle);
-void do_filesearch(void);
+void do_filesearch(bool forwards);
 void do_fileresearch(bool forwards);
 void to_first_file(void);
 void to_last_file(void);