settings: keep screen on

lib/model/settings/screen_on.dart

@@ -0,0 +1,22 @@
+import 'package:screen/screen.dart';
+
+enum KeepScreenOn { never, fullscreenOnly, always }
+
+extension ExtraKeepScreenOn on KeepScreenOn {
+  String get name {
+    switch (this) {
+      case KeepScreenOn.never:
+        return 'Never';
+      case KeepScreenOn.fullscreenOnly:
+        return 'Viewer page only';
+      case KeepScreenOn.always:
+        return 'Always';
+      default:
+        return toString();
+    }
+  }
+
+  void apply() {
+    Screen.keepOn(this == KeepScreenOn.always);
+  }
+}

lib/model/settings/settings.dart

@@ -1,5 +1,6 @@
 import 'package:aves/model/settings/coordinate_format.dart';
 import 'package:aves/model/settings/home_page.dart';
+import 'package:aves/model/settings/screen_on.dart';
 import 'package:aves/widgets/fullscreen/info/location_section.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'package:firebase_crashlytics/firebase_crashlytics.dart';
@@ -23,6 +24,7 @@ class Settings extends ChangeNotifier {
   static const hasAcceptedTermsKey = 'has_accepted_terms';
   static const isCrashlyticsEnabledKey = 'is_crashlytics_enabled';
   static const mustBackTwiceToExitKey = 'must_back_twice_to_exit';
+  static const keepScreenOnKey = 'keep_screen_on';
   static const homePageKey = 'home_page';
   static const catalogTimeZoneKey = 'catalog_time_zone';
 
@@ -75,6 +77,13 @@ class Settings extends ChangeNotifier {
 
   set mustBackTwiceToExit(bool newValue) => setAndNotify(mustBackTwiceToExitKey, newValue);
 
+  KeepScreenOn get keepScreenOn => getEnumOrDefault(keepScreenOnKey, KeepScreenOn.fullscreenOnly, KeepScreenOn.values);
+
+  set keepScreenOn(KeepScreenOn newValue) {
+    setAndNotify(keepScreenOnKey, newValue.toString());
+    newValue.apply();
+  }
+
   HomePageSetting get homePage => getEnumOrDefault(homePageKey, HomePageSetting.collection, HomePageSetting.values);
 
   set homePage(HomePageSetting newValue) => setAndNotify(homePageKey, newValue.toString());

lib/widgets/fullscreen/fullscreen_body.dart

@@ -3,6 +3,7 @@ import 'dart:math';
 
 import 'package:aves/model/filters/filters.dart';
 import 'package:aves/model/image_entry.dart';
+import 'package:aves/model/settings/screen_on.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/model/source/collection_lens.dart';
 import 'package:aves/utils/change_notifier.dart';
@@ -23,6 +24,7 @@ import 'package:flutter/services.dart';
 import 'package:flutter_ijkplayer/flutter_ijkplayer.dart';
 import 'package:photo_view/photo_view.dart';
 import 'package:provider/provider.dart';
+import 'package:screen/screen.dart';
 import 'package:tuple/tuple.dart';
 
 class FullscreenBody extends StatefulWidget {
@@ -97,10 +99,13 @@ class FullscreenBodyState extends State<FullscreenBody> with SingleTickerProvide
       collection: collection,
       showInfo: () => _goToVerticalPage(infoPage),
     );
-    WidgetsBinding.instance.addObserver(this);
     _initVideoController();
     _registerWidget(widget);
+    WidgetsBinding.instance.addObserver(this);
     WidgetsBinding.instance.addPostFrameCallback((_) => _initOverlay());
+    if (settings.keepScreenOn == KeepScreenOn.fullscreenOnly) {
+      Screen.keepOn(true);
+    }
   }
 
   @override
@@ -327,6 +332,9 @@ class FullscreenBodyState extends State<FullscreenBody> with SingleTickerProvide
   void _onLeave() {
     if (Navigator.canPop(context)) {
       _showSystemUI();
+      if (settings.keepScreenOn == KeepScreenOn.fullscreenOnly) {
+        Screen.keepOn(false);
+      }
     } else {
       // exit app when trying to pop a fullscreen page that is a viewer for a single entry
       SystemNavigator.pop();

lib/widgets/home_page.dart

@@ -2,6 +2,7 @@ import 'package:aves/main.dart';
 import 'package:aves/model/filters/filters.dart';
 import 'package:aves/model/image_entry.dart';
 import 'package:aves/model/settings/home_page.dart';
+import 'package:aves/model/settings/screen_on.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/model/source/collection_lens.dart';
 import 'package:aves/services/image_file_service.dart';
@@ -19,7 +20,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:pedantic/pedantic.dart';
 import 'package:permission_handler/permission_handler.dart';
-import 'package:screen/screen.dart';
 
 class HomePage extends StatefulWidget {
   static const routeName = '/';
@@ -43,7 +43,7 @@ class _HomePageState extends State<HomePage> {
     super.initState();
     _setup();
     imageCache.maximumSizeBytes = 512 * (1 << 20);
-    Screen.keepOn(true);
+    settings.keepScreenOn.apply();
   }
 
   @override

lib/widgets/settings/settings_page.dart

@@ -1,5 +1,6 @@
 import 'package:aves/model/settings/coordinate_format.dart';
 import 'package:aves/model/settings/home_page.dart';
+import 'package:aves/model/settings/screen_on.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/widgets/common/aves_selection_dialog.dart';
 import 'package:aves/widgets/common/data_providers/media_query_data_provider.dart';
@@ -49,6 +50,23 @@ class SettingsPage extends StatelessWidget {
                     title: Text('Tap “back” twice to exit'),
                   ),
                   SectionTitle('Display'),
+                  ListTile(
+                    title: Text('Keep screen on'),
+                    subtitle: Text(settings.keepScreenOn.name),
+                    onTap: () async {
+                      final value = await showDialog<KeepScreenOn>(
+                        context: context,
+                        builder: (context) => AvesSelectionDialog<KeepScreenOn>(
+                          initialValue: settings.keepScreenOn,
+                          options: Map.fromEntries(KeepScreenOn.values.map((v) => MapEntry(v, v.name))),
+                          title: 'Keep Screen On',
+                        ),
+                      );
+                      if (value != null) {
+                        settings.keepScreenOn = value;
+                      }
+                    },
+                  ),
                   ListTile(
                     title: Text('SVG background'),
                     trailing: SvgBackgroundSelector(),