menuconfig: Extend dialog_textbox so that it can exit on arbitrary keypresses

The caller will be able to perform actions based on hotkeys in the displayed
text.

Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Signed-off-by: Michal Marek <mmarek@suse.cz>

3 files changed, 33 insertions, 13 deletions

diff --git a/scripts/kconfig/lxdialog/dialog.h b/scripts/kconfig/lxdialog/dialog.h
index 43a58ec09cd4..35ca0286d105 100644
--- a/scripts/kconfig/lxdialog/dialog.h
+++ b/scripts/kconfig/lxdialog/dialog.h
@@ -210,7 +210,8 @@ int first_alpha(const char *string, const char *exempt);
 int dialog_yesno(const char *title, const char *prompt, int height, int width);
 int dialog_msgbox(const char *title, const char *prompt, int height,
                   int width, int pause);
-int dialog_textbox(const char *title, const char *file, int height, int width);
+int dialog_textbox(const char *title, const char *file, int height, int width,
+                   int *keys);
 int dialog_menu(const char *title, const char *prompt,
                 const void *selected, int *s_scroll);
 int dialog_checklist(const char *title, const char *prompt, int height,
diff --git a/scripts/kconfig/lxdialog/textbox.c b/scripts/kconfig/lxdialog/textbox.c
index 264a2b9f320c..eb4ee92ad2b3 100644
--- a/scripts/kconfig/lxdialog/textbox.c
+++ b/scripts/kconfig/lxdialog/textbox.c
@@ -47,14 +47,16 @@ static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
 
 /*
  * Display text from a file in a dialog box.
+ *
+ * keys is a null-terminated array
  */
-int dialog_textbox(const char *title, const char *tbuf,
-                   int initial_height, int initial_width)
+int dialog_textbox(const char *title, const char *tbuf, int initial_height,
+                   int initial_width, int *keys)
 {
         int i, x, y, cur_x, cur_y, key = 0;
         int height, width, boxh, boxw;
-        int passed_end;
         WINDOW *dialog, *box;
+        bool done = false;
 
         begin_reached = 1;
         end_reached = 0;
@@ -122,7 +124,7 @@ do_resize:
         attr_clear(box, boxh, boxw, dlg.dialog.atr);
         refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x);
 
-        while ((key != KEY_ESC) && (key != '\n')) {
+        while (!done) {
                 key = wgetch(dialog);
                 switch (key) {
                 case 'E':       /* Exit */
@@ -130,9 +132,9 @@ do_resize:
                 case 'X':
                 case 'x':
                 case 'q':
-                        delwin(box);
-                        delwin(dialog);
-                        return 0;
+                case '\n':
+                        done = true;
+                        break;
                 case 'g':       /* First page */
                 case KEY_HOME:
                         if (!begin_reached) {
@@ -156,6 +158,8 @@ do_resize:
                 case 'k':
                 case KEY_UP:
                         if (!begin_reached) {
+                                int passed_end = 0;
+
                                 back_lines(page_length + 1);
 
                                 /* We don't call print_page() here but use
@@ -169,7 +173,6 @@ do_resize:
                                 wscrl(box, -1); /* Scroll box region down one line */
                                 scrollok(box, FALSE);
                                 page_length = 0;
-                                passed_end = 0;
                                 for (i = 0; i < boxh; i++) {
                                         if (!i) {
                                                 /* print first line of page */
@@ -252,7 +255,8 @@ do_resize:
                                          cur_y, cur_x);
                         break;
                 case KEY_ESC:
-                        key = on_key_esc(dialog);
+                        if (on_key_esc(dialog) == KEY_ESC)
+                                done = true;
                         break;
                 case KEY_RESIZE:
                         back_lines(height);
@@ -260,11 +264,18 @@ do_resize:
                         delwin(dialog);
                         on_key_resize();
                         goto do_resize;
+                default:
+                        for (i = 0; keys[i]; i++) {
+                                if (key == keys[i]) {
+                                        done = true;
+                                        break;
+                                }
+                        }
                 }
         }
         delwin(box);
         delwin(dialog);
-        return key;             /* ESC pressed */
+        return key;
 }
 
 /*
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index d856d40869e6..e097efb9c3ef 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -279,6 +279,8 @@ static void conf_choice(struct menu *menu);
 static void conf_string(struct menu *menu);
 static void conf_load(void);
 static void conf_save(void);
+static int show_textbox_ext(const char *title, const char *text, int r, int c,
+                            int *keys);
 static void show_textbox(const char *title, const char *text, int r, int c);
 static void show_helptext(const char *title, const char *text);
 static void show_help(struct menu *menu);
@@ -618,10 +620,16 @@ static void conf(struct menu *menu)
         }
 }
 
-static void show_textbox(const char *title, const char *text, int r, int c)
+static int show_textbox_ext(const char *title, const char *text, int r, int c,
+                            int *keys)
 {
         dialog_clear();
-        dialog_textbox(title, text, r, c);
+        return dialog_textbox(title, text, r, c, keys);
+}
+
+static void show_textbox(const char *title, const char *text, int r, int c)
+{
+        show_textbox_ext(title, text, r, c, (int []) {0});
 }
 
 static void show_helptext(const char *title, const char *text)