revert: "feat: improve predictive back (#1487)"

This reverts commit 06ff36c836.

Signed-off-by: validcube <pun.butrach@gmail.com>

lib/services/manager_api.dart

@@ -582,8 +582,8 @@ class ManagerAPI {
     return showDialog(
       barrierDismissible: false,
       context: context,
-      builder: (context) => PopScope(
+      builder: (context) => WillPopScope(
-        canPop: false,
+        onWillPop: () async => false,
         child: AlertDialog(
           backgroundColor: Theme.of(context).colorScheme.secondaryContainer,
           title: I18nText('warning'),

lib/ui/views/installer/installer_view.dart

@@ -15,8 +15,7 @@ class InstallerView extends StatelessWidget {
     return ViewModelBuilder<InstallerViewModel>.reactive(
       onViewModelReady: (model) => model.initialize(context),
       viewModelBuilder: () => InstallerViewModel(),
-      builder: (context, model, child) => PopScope(
+      builder: (context, model, child) => WillPopScope(
-        onPopInvoked: (bool didPop) => model.onPopInvoked(context, didPop),
         child: SafeArea(
           top: false,
           bottom: model.isPatching,
@@ -84,7 +83,7 @@ class InstallerView extends StatelessWidget {
                     maxLines: 1,
                     overflow: TextOverflow.ellipsis,
                   ),
-                  onBackButtonPressed: () => model.onBackButtonInvoked(context),
+                  onBackButtonPressed: () => model.onWillPop(context),
                   bottom: PreferredSize(
                     preferredSize: const Size(double.infinity, 1.0),
                     child: GradientProgressIndicator(progress: model.progress),
@@ -112,6 +111,7 @@ class InstallerView extends StatelessWidget {
             ),
           ),
         ),
+        onWillPop: () => model.onWillPop(context),
       ),
     );
   }

lib/ui/views/installer/installer_viewmodel.dart

@@ -489,38 +489,25 @@ class InstallerViewModel extends BaseViewModel {
     }
   }
 
-  bool canPop() {
+  Future<bool> onWillPop(BuildContext context) async {
-    return !isPatching;
+    if (isPatching) {
-  }
-
-  void onBackButtonInvoked(BuildContext context) {
-    if (canPop()) {
-      onPopInvoked(context, true);
-    } else {
-      onPopInvoked(context, false);
-    }
-  }
-
-  Future<void> onPopInvoked(BuildContext context, bool didPop) async {
-    if (didPop) {
       if (!cancel) {
-        cleanPatcher();
+        cancel = true;
+        _toast.showBottom('installerView.pressBackAgain');
+      } else if (!isCanceled) {
+        await stopPatcher();
       } else {
-        _patcherAPI.cleanPatcher();
+        _toast.showBottom('installerView.noExit');
-      }
-      screenshotCallback.dispose();
-      Navigator.of(context).pop();
-    } else {
-      if (isPatching) {
-        if (!cancel) {
-          cancel = true;
-          _toast.showBottom('installerView.pressBackAgain');
-        } else if (!isCanceled) {
-          await stopPatcher();
-        } else {
-          _toast.showBottom('installerView.noExit');
-        }
       }
+      return false;
     }
+    if (!cancel) {
+      cleanPatcher();
+    } else {
+      _patcherAPI.cleanPatcher();
+    }
+    screenshotCallback.dispose();
+    Navigator.of(context).pop();
+    return true;
   }
 }

lib/ui/views/navigation/navigation_view.dart

@@ -13,11 +13,13 @@ class NavigationView extends StatelessWidget {
     return ViewModelBuilder<NavigationViewModel>.reactive(
       onViewModelReady: (model) => model.initialize(context),
       viewModelBuilder: () => locator<NavigationViewModel>(),
-      builder: (context, model, child) => PopScope(
+      builder: (context, model, child) => WillPopScope(
-        canPop: model.currentIndex == 0,
+        onWillPop: () async {
-        onPopInvoked: (bool didPop) {
+          if (model.currentIndex == 0) {
-          if (!didPop) {
+            return true;
+          } else {
             model.setIndex(0);
+            return false;
           }
         },
         child: Scaffold(