Allow sign out by trusted non-paired panic apps

briar-android/src/main/java/org/briarproject/briar/android/panic/PanicPreferencesFragment.java

@@ -97,14 +97,12 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 			showPanicApp(packageName);
 
 			if (packageName.equals(Panic.PACKAGE_NAME_NONE)) {
-				lockPref.setEnabled(false);
 				purgePref.setChecked(false);
 				purgePref.setEnabled(false);
 				uninstallPref.setChecked(false);
 				uninstallPref.setEnabled(false);
 				getActivity().setResult(Activity.RESULT_CANCELED);
 			} else {
-				lockPref.setEnabled(true);
 				purgePref.setEnabled(true);
 				uninstallPref.setEnabled(true);
 			}
@@ -179,8 +177,7 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 			panicAppPref.setIcon(
 					android.R.drawable.ic_menu_close_clear_cancel);
 
-			// disable panic actions
-			lockPref.setEnabled(false);
+			// disable destructive panic actions
 			purgePref.setEnabled(false);
 			uninstallPref.setEnabled(false);
 		} else {
@@ -192,8 +189,7 @@ public class PanicPreferencesFragment extends PreferenceFragmentCompat
 				panicAppPref.setIcon(
 						pm.getApplicationIcon(triggerPackageName));
 
-				// enable panic actions
-				lockPref.setEnabled(true);
+				// enable destructive panic actions
 				purgePref.setEnabled(true);
 				uninstallPref.setEnabled(true);
 			} catch (PackageManager.NameNotFoundException e) {

briar-android/src/main/java/org/briarproject/briar/android/panic/PanicResponderActivity.java

@@ -71,11 +71,13 @@ public class PanicResponderActivity extends BriarActivity {
 					} else if (sharedPref.getBoolean(KEY_PURGE, false)) {
 						LOG.info("Purging all data...");
 						deleteAllData();
-					} else if (sharedPref.getBoolean(KEY_LOCK, true)) {
-						LOG.info("Signing out...");
-						signOut(true);
 					}
 				}
+				// non-destructive actions are allowed by non-connected trusted apps
+				if (sharedPref.getBoolean(KEY_LOCK, true)) {
+					LOG.info("Signing out...");
+					signOut(true);
+				}
 			}
 		}
 

briar-android/src/main/res/xml/panic_preferences.xml

@@ -10,7 +10,6 @@
 
 	<SwitchPreference
 		android:defaultValue="true"
-		android:enabled="false"
 		android:key="pref_key_lock"
 		android:summary="@string/panic_setting_signout_summary"
 		android:title="@string/panic_setting_signout_title"/>