Add ability to always have autolock on

Tested on ErosQ

Added a setting in the Advanced Softlock menu to always
have autolock on, rather than having to "arm" it with the
softlock button. Lock/Unlock still works the same with
this on, but when the screen turns off, the device always
ends up in the locked state. Requires Autolock On to be
set as well, and the normal Autolock functionality is
unchanged with this off.

Caveat: the power/softlock button must be pressed
at least once after powering on the device or enabling the
feature. After that, it should consistently always "arm"
the autolock.

Added feature to manual in
manual/configure_rockbox/system_options.tex. Also updated
some labels I had changed in the Advanced Key Lock menu
and added information for Disable All Lock Notifications
in a previous commit. Shared items also updated in
manual/configure_rockbox/display_options.tex for selective
backlight.

Change-Id: I09dc6814bee803e40c7088157e1fe9d01d5f3474

4 files changed, 38 insertions, 16 deletions

diff --git a/apps/action.c b/apps/action.c
index f9602b967f..34897b938c 100644
--- a/apps/action.c
+++ b/apps/action.c
@@ -675,24 +675,31 @@ static inline int do_auto_softlock(action_last_t *last, action_cur_t *cur)
     }
     else if (action == ACTION_STD_KEYLOCK)
     {
-        last->unlock_combo = cur->button;/* set unlock combo to allow unlock */
-        last->softlock_mask ^= SEL_ACTION_ALOCK_OK;
-        action_handle_backlight(true, false);
-            /* If we don't wait for a moment for the backlight queue
-             *  to process, the user will never see the message */
-        if (!is_backlight_on(false))
+        if (!has_flag(last->softlock_mask, SEL_ACTION_ALWAYSAUTOLOCK)) // normal operation, clear/arm autolock
         {
-            sleep(HZ/2);
-        }
+            last->unlock_combo = cur->button;/* set unlock combo to allow unlock */
+            last->softlock_mask ^= SEL_ACTION_ALOCK_OK;
+            action_handle_backlight(true, false);
+                /* If we don't wait for a moment for the backlight queue
+                 *  to process, the user will never see the message */
+            if (!is_backlight_on(false))
+            {
+                sleep(HZ/2);
+            }
 
-        if (has_flag(last->softlock_mask, SEL_ACTION_ALOCK_OK))
-        {
-            splash(HZ/2, ID2P(LANG_ACTION_AUTOLOCK_ON));
-            action = ACTION_REDRAW;
-        }
-        else
+            if (has_flag(last->softlock_mask, SEL_ACTION_ALOCK_OK))
+            {
+                splash(HZ/2, ID2P(LANG_ACTION_AUTOLOCK_ON));
+                action = ACTION_REDRAW;
+            }
+            else
+            {
+                splash(HZ/2, ID2P(LANG_ACTION_AUTOLOCK_OFF));
+            }
+        } else if (!has_flag(last->softlock_mask, SEL_ACTION_ALOCK_OK)) // always autolock, but not currently armed
         {
-            splash(HZ/2, ID2P(LANG_ACTION_AUTOLOCK_OFF));
+            last->unlock_combo = cur->button;/* set unlock combo to allow unlock */
+            last->softlock_mask ^= SEL_ACTION_ALOCK_OK;
         }
     }
 
diff --git a/apps/action.h b/apps/action.h
index da4565c28b..e4ad29504b 100644
--- a/apps/action.h
+++ b/apps/action.h
@@ -51,7 +51,7 @@
 #define SEL_ACTION_SKIP       0x008U
 #define SEL_ACTION_NOUNMAPPED 0x010U/* disable backlight on unmapped buttons */
 #define SEL_ACTION_ALLNONOTIFY  0x020U/* disable switch for all softlock notifications */
-                                    /* Available 0x040U*/
+#define SEL_ACTION_ALWAYSAUTOLOCK 0x040U/* always prime autolock, requires autolock enabled */
 #define SEL_ACTION_NOTOUCH    0x080U/* disable touch screen/pad on screen lock */
 #define SEL_ACTION_AUTOLOCK   0x100U/* autolock on backlight off */
 #define SEL_ACTION_NOEXT      0x200U/* disable selective backlight while charge*/
diff --git a/apps/lang/english.lang b/apps/lang/english.lang
index 327584c4f6..9ca4c84430 100644
--- a/apps/lang/english.lang
+++ b/apps/lang/english.lang
@@ -15767,3 +15767,17 @@
     *: "Exempt Volume"
   </voice>
 </phrase>
+<phrase>
+  id: LANG_ACTION_ALWAYSAUTOLOCK
+  desc: always prime autolock
+  user: core
+  <source>
+    *: "Always Autolock"
+  </source>
+  <dest>
+    *: "Always Autolock"
+  </dest>
+  <voice>
+    *: "Always Autolock"
+  </voice>
+</phrase>
diff --git a/apps/menus/settings_menu.c b/apps/menus/settings_menu.c
index a5daad01ce..0b7516f749 100644
--- a/apps/menus/settings_menu.c
+++ b/apps/menus/settings_menu.c
@@ -89,6 +89,7 @@ int mask = global_settings.bt_selective_softlock_actions_mask;
                                        {ID2P(LANG_ACTION_SKIP),   SEL_ACTION_SKIP},
  #ifdef HAVE_BACKLIGHT
                                        {ID2P(LANG_ACTION_AUTOLOCK_ON),    SEL_ACTION_AUTOLOCK},
+                                       {ID2P(LANG_ACTION_ALWAYSAUTOLOCK), SEL_ACTION_ALWAYSAUTOLOCK},
  #endif
  #if defined(HAVE_TOUCHPAD) || defined(HAVE_TOUCHSCREEN)
                                        {ID2P(LANG_ACTION_DISABLE_TOUCH),  SEL_ACTION_NOTOUCH},