diff options
Diffstat (limited to 'scripts/kconfig/lxdialog/util.c')
| -rw-r--r-- | scripts/kconfig/lxdialog/util.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/scripts/kconfig/lxdialog/util.c b/scripts/kconfig/lxdialog/util.c index 0b3118df50df..cb21dc4dd9fc 100644 --- a/scripts/kconfig/lxdialog/util.c +++ b/scripts/kconfig/lxdialog/util.c @@ -477,6 +477,39 @@ int first_alpha(const char *string, const char *exempt) return 0; } +/* + * ncurses uses ESC to detect escaped char sequences. This resutl in + * a small timeout before ESC is actually delivered to the application. + * lxdialog suggest <ESC> <ESC> which is correctly translated to two + * times esc. But then we need to ignore the second esc to avoid stepping + * out one menu too much. Filter away all escaped key sequences since + * keypad(FALSE) turn off ncurses support for escape sequences - and thats + * needed to make notimeout() do as expected. + */ +int on_key_esc(WINDOW *win) +{ + int key; + int key2; + int key3; + + nodelay(win, TRUE); + keypad(win, FALSE); + key = wgetch(win); + key2 = wgetch(win); + do { + key3 = wgetch(win); + } while (key3 != ERR); + nodelay(win, FALSE); + keypad(win, TRUE); + if (key == KEY_ESC && key2 == ERR) + return KEY_ESC; + else if (key != ERR && key != KEY_ESC && key2 == ERR) + ungetch(key); + + return -1; +} + + struct dialog_list *item_cur; struct dialog_list item_nil; struct dialog_list *item_head; |