pre cache the chat list view

lib/src/visual/views/chats/chat_list.view.dart

@@ -1,9 +1,6 @@
 import 'dart:async';
 
-import 'package:cryptography_plus/cryptography_plus.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
@@ -13,7 +10,6 @@ import 'package:twonly/src/database/twonly.db.dart';
 import 'package:twonly/src/providers/purchases.provider.dart';
 import 'package:twonly/src/services/mediafiles/mediafile.service.dart';
 import 'package:twonly/src/services/subscription.service.dart';
-import 'package:twonly/src/services/user.service.dart';
 import 'package:twonly/src/utils/log.dart';
 import 'package:twonly/src/utils/misc.dart';
 import 'package:twonly/src/visual/components/avatar_icon.comp.dart';
@@ -32,7 +28,7 @@ class ChatListView extends StatefulWidget {
   State<ChatListView> createState() => _ChatListViewState();
 }
 
-class _ChatListViewState extends State<ChatListView> {
+class _ChatListViewState extends State<ChatListView> with AutomaticKeepAliveClientMixin<ChatListView> {
   StreamSubscription<void>? _userSub;
   StreamSubscription<List<Group>>? _contactsSub;
   StreamSubscription<List<Contact>>? _contactsCountSub;
@@ -126,32 +122,11 @@ class _ChatListViewState extends State<ChatListView> {
         }
       }
     });
-
-    WidgetsBinding.instance.addPostFrameCallback((_) async {
-      final changeLog = await rootBundle.loadString('CHANGELOG.md');
-      final changeLogHash = (await compute(
-        Sha256().hash,
-        changeLog.codeUnits,
-      )).bytes;
-      if (!userService.currentUser.hideChangeLog &&
-          userService.currentUser.lastChangeLogHash.toString() !=
-              changeLogHash.toString()) {
-        await UserService.update((u) {
-          u.lastChangeLogHash = changeLogHash;
-        });
-        if (!mounted) return;
-        // only show changelog to people who already have contacts
-        // this prevents that this is shown directly after the user registered
-        if (_groupsNotPinned.isNotEmpty) {
-          await context.push(
-            Routes.settingsHelpChangelog,
-            extra: changeLog,
-          );
-        }
-      }
-    });
   }
 
+  @override
+  bool get wantKeepAlive => true;
+
   @override
   void dispose() {
     _contactsSub?.cancel();
@@ -165,6 +140,7 @@ class _ChatListViewState extends State<ChatListView> {
 
   @override
   Widget build(BuildContext context) {
+    super.build(context);
     final plan = context.watch<PurchasesProvider>().plan;
     return Scaffold(
       appBar: AppBar(

lib/src/visual/views/home.view.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:app_links/app_links.dart';
 import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:flutter_sharing_intent/model/sharing_file.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
@@ -268,6 +269,10 @@ class HomeViewState extends State<HomeView> with WidgetsBindingObserver {
       setState(() {
         _offsetFromOne = 1.0 - (_homeViewPageController.page ?? 0);
         _offsetRatio = _offsetFromOne.abs();
+        final pageIndex = _homeViewPageController.page?.round();
+        if (pageIndex != null && pageIndex != _activePageIdx) {
+          _activePageIdx = pageIndex;
+        }
       });
     }
 
@@ -310,17 +315,19 @@ class HomeViewState extends State<HomeView> with WidgetsBindingObserver {
           NotificationListener<ScrollNotification>(
             onNotification: _onPageView,
             child: Positioned.fill(
-              child: PageView(
+              child: CustomScrollView(
+                scrollDirection: Axis.horizontal,
+                physics: const PageScrollPhysics(),
                 controller: _homeViewPageController,
-                onPageChanged: (index) {
-                  setState(() {
-                    _activePageIdx = index;
-                  });
-                },
-                children: [
-                  const ChatListView(),
-                  Container(),
-                  const MemoriesView(),
+                scrollCacheExtent: const ScrollCacheExtent.viewport(1),
+                slivers: [
+                  SliverFillViewport(
+                    delegate: SliverChildListDelegate([
+                      const ChatListView(),
+                      Container(),
+                      const MemoriesView(),
+                    ]),
+                  ),
                 ],
               ),
             ),

lib/src/visual/views/memories/memories.view.dart

@@ -21,7 +21,7 @@ class MemoriesView extends StatefulWidget {
   State<MemoriesView> createState() => MemoriesViewState();
 }
 
-class MemoriesViewState extends State<MemoriesView> {
+class MemoriesViewState extends State<MemoriesView> with AutomaticKeepAliveClientMixin<MemoriesView> {
   late final MemoriesService _service;
   final ValueNotifier<String?> _activeMediaIdNotifier = ValueNotifier(null);
   final ScrollController _scrollController = ScrollController();
@@ -38,6 +38,9 @@ class MemoriesViewState extends State<MemoriesView> {
     _activeMediaIdNotifier.addListener(_onActiveMediaChanged);
   }
 
+  @override
+  bool get wantKeepAlive => true;
+
   @override
   void dispose() {
     _activeMediaIdNotifier.removeListener(_onActiveMediaChanged);
@@ -369,6 +372,7 @@ class MemoriesViewState extends State<MemoriesView> {
 
   @override
   Widget build(BuildContext context) {
+    super.build(context);
     return Scaffold(
       body: Stack(
         fit: StackFit.expand,

lib/src/visual/views/settings/help/changelog.view.dart

@@ -3,7 +3,6 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:twonly/locator.dart';
-import 'package:twonly/src/services/user.service.dart';
 import 'package:twonly/src/utils/misc.dart';
 
 List<Widget> parseMarkdown(BuildContext context, String markdown) {
@@ -107,20 +106,6 @@ class _ChangeLogViewState extends State<ChangeLogView> {
               ),
             ),
           ),
-          bottomNavigationBar: BottomAppBar(
-            child: Row(
-              mainAxisAlignment: MainAxisAlignment.spaceBetween,
-              children: [
-                Text(context.lang.openChangeLog),
-                Switch.adaptive(
-                  value: !userService.currentUser.hideChangeLog,
-                  onChanged: (_) => UserService.update(
-                    (u) => u.hideChangeLog = !u.hideChangeLog,
-                  ),
-                ),
-              ],
-            ),
-          ),
         );
       },
     );