Add setting to hide shutdown message

Also keeps display from lighting up before shutdown,
which reduces distractions, especially at night and
when the sleep timer is used by allowing the
screen to remain dark.

Change-Id: I1c2d1966f6fb9766532adf01e8828876a871857f

apps/lang/english.lang

@@ -16136,3 +16136,17 @@
     *: "List Wraparound"
   </voice>
 </phrase>
+<phrase>
+  id: LANG_SHOW_SHUTDOWN_MESSAGE
+  desc: in Settings
+  user: core
+  <source>
+    *: "Show Shutdown Message"
+  </source>
+  <dest>
+    *: "Show Shutdown Message"
+  </dest>
+  <voice>
+    *: "Show Shutdown Message"
+  </voice>
+</phrase>

apps/menus/settings_menu.c

@@ -563,9 +563,11 @@ MENUITEM_SETTING(sleeptimer_on_startup,
                  &global_settings.sleeptimer_on_startup, NULL);
 MENUITEM_SETTING(keypress_restarts_sleeptimer,
                  &global_settings.keypress_restarts_sleeptimer, NULL);
+MENUITEM_SETTING(show_shutdown_message, &global_settings.show_shutdown_message, NULL);
 
 MAKE_MENU(startup_shutdown_menu, ID2P(LANG_STARTUP_SHUTDOWN),
           0, Icon_System_menu,
+            &show_shutdown_message,
             &start_screen,
             &poweroff,
             &sleeptimer_toggle,

apps/misc.c

@@ -323,7 +323,10 @@ static bool clean_shutdown(void (*callback)(void *), void *parameter)
 #endif
             level = battery_level();
             if (level > 10 || level < 0)
+            {
+                if (global_settings.show_shutdown_message)
                     splash(0, str(LANG_SHUTTINGDOWN));
+            }
             else
             {
                 msg_id = LANG_WARNING_BATTERY_LOW;

apps/settings.h

@@ -761,6 +761,9 @@ struct user_settings
     bool sleeptimer_on_startup;
     bool keypress_restarts_sleeptimer;
 
+    bool show_shutdown_message; /* toggle whether display lights up and displays message
+                                when shutting down */
+
 #ifdef HAVE_MORSE_INPUT
     bool morse_input; /* text input method setting */
 #endif

apps/settings_list.c

@@ -1956,6 +1956,10 @@ const struct settings_list settings[] = {
                   "sleeptimer on startup", NULL),
     OFFON_SETTING(0, keypress_restarts_sleeptimer, LANG_KEYPRESS_RESTARTS_SLEEP_TIMER, false,
                   "keypress restarts sleeptimer", set_keypress_restarts_sleep_timer),
+
+    OFFON_SETTING(0, show_shutdown_message, LANG_SHOW_SHUTDOWN_MESSAGE, true,
+                  "show shutdown message", NULL),
+
 #ifdef HAVE_TOUCHPAD_SENSITIVITY_SETTING
 /* If specific values are set for touchpad sensitivity setting we use those */
 #if (defined(MAX_TOUCHPAD_SENSITIVITY_SETTING) \

firmware/backlight.c

@@ -21,6 +21,9 @@
  *
  ****************************************************************************/
 #include "config.h"
+#if !defined(BOOTLOADER)
+#include "settings.h"
+#endif
 #include <stdlib.h>
 #include "cpu.h"
 #include "kernel.h"
@@ -667,7 +670,11 @@ void backlight_thread(void)
 
             case SYS_POWEROFF:  /* Lock backlight on poweroff so it doesn't */
                 locked = true;      /* go off before power is actually cut. */
-                /* fall through */
+#if !defined(BOOTLOADER)
+                if (!global_settings.show_shutdown_message)
+                    break;
+#endif
+                /* else fall through */
 #if CONFIG_CHARGING
             case SYS_CHARGER_CONNECTED:
             case SYS_CHARGER_DISCONNECTED:

manual/appendix/config_file_options.tex

@@ -107,6 +107,7 @@
 
     idle poweroff   & off, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 30, 45, 60
                                         & min\\
+    show shutdown message & off, on     & N/A\\
     sleeptimer duration   & 5 to 300 (in steps of 5)
                                         & min\\
     sleeptimer on startup & off, on     & N/A\\

manual/configure_rockbox/startup_shutdown_options.tex

@@ -5,6 +5,11 @@
 The \setting{Startup/Shutdown} sub menu allows you to configure items which
 are run at startup, or initiate a shutdown when conditions are met.
 
+\begin{description}
+    \item[Show Shutdown Message.] If set, a message will be displayed and the display
+    will light up before the device shuts down.
+\end{description}
+
 \subsection{Start Screen}
   Set the screen that Rockbox will start in. The default is the main menu but
   the following options are available: