From 434ec812f18bff78a9437fa51c2d087c32219107 Mon Sep 17 00:00:00 2001
From: Andre Rosado <arosado@bitwarden.com>
Date: Mon, 23 Feb 2026 13:59:09 +0000
Subject: [PATCH] Setting configuration for HorizonOS devices on MainActivity

---
 .../com/x8bit/bitwarden/MainActivity.kt       | 35 +++++++++++++++++++
 .../com/x8bit/bitwarden/MainViewModel.kt      | 12 +++++++
 .../com/x8bit/bitwarden/MainViewModelTest.kt  | 25 +++++++++++++
 3 files changed, 72 insertions(+)

diff --git a/app/src/main/kotlin/com/x8bit/bitwarden/MainActivity.kt b/app/src/main/kotlin/com/x8bit/bitwarden/MainActivity.kt
index 593155a9283..85967c0b7b0 100644
--- a/app/src/main/kotlin/com/x8bit/bitwarden/MainActivity.kt
+++ b/app/src/main/kotlin/com/x8bit/bitwarden/MainActivity.kt
@@ -202,6 +202,14 @@ class MainActivity : AppCompatActivity() {
         .takeIf { it }
         ?: super.dispatchKeyEvent(event)
 
+    override fun onPostCreate(savedInstanceState: Bundle?) {
+        super.onPostCreate(savedInstanceState)
+        // resize only one time at the start
+        if (!mainViewModel.stateFlow.value.hasResizeBeenRequested) {
+            setHorizonOSAppLayout()
+        }
+    }
+
     @Composable
     private fun SetupEventsEffect(navController: NavController) {
         EventsEffect(viewModel = mainViewModel) { event ->
@@ -257,4 +265,31 @@ class MainActivity : AppCompatActivity() {
             window.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
         }
     }
+
+    private fun isHorizonOSDevice(): Boolean {
+        return Build.MANUFACTURER.equals("Oculus", ignoreCase = true) ||
+            Build.MANUFACTURER.equals("Meta", ignoreCase = true)
+    }
+
+    @Suppress("MagicNumber", "TooGenericExceptionCaught")
+    private fun setHorizonOSAppLayout() {
+        if (!isHorizonOSDevice()) {
+            return
+        }
+        window.decorView.post {
+            try {
+                val clazz = Class.forName("horizonos.view.WindowExt")
+                val method = clazz.getMethod(
+                    "requestWindowResize",
+                    android.view.Window::class.java,
+                    Int::class.javaPrimitiveType,
+                    Int::class.javaPrimitiveType,
+                )
+                method.invoke(null, window, 1024, 640)
+                mainViewModel.trySendAction(MainAction.Internal.ResizeHasBeenRequested)
+            } catch (t: Throwable) {
+                // Not Horizon OS / API not present / request ignored by system
+            }
+        }
+    }
 }
diff --git a/app/src/main/kotlin/com/x8bit/bitwarden/MainViewModel.kt b/app/src/main/kotlin/com/x8bit/bitwarden/MainViewModel.kt
index 31e5fadb81c..16c643e5a2b 100644
--- a/app/src/main/kotlin/com/x8bit/bitwarden/MainViewModel.kt
+++ b/app/src/main/kotlin/com/x8bit/bitwarden/MainViewModel.kt
@@ -96,6 +96,7 @@ class MainViewModel @Inject constructor(
         theme = settingsRepository.appTheme,
         isScreenCaptureAllowed = settingsRepository.isScreenCaptureAllowed,
         isDynamicColorsEnabled = settingsRepository.isDynamicColorsEnabled,
+        hasResizeBeenRequested = false,
     ),
 ) {
     private var specialCircumstance: SpecialCircumstance?
@@ -228,6 +229,7 @@ class MainViewModel @Inject constructor(
             is MainAction.Internal.ThemeUpdate -> handleAppThemeUpdated(action)
             is MainAction.Internal.DynamicColorsUpdate -> handleDynamicColorsUpdate(action)
             is MainAction.Internal.CookieAcquisitionReady -> handleCookieAcquisitionReady()
+            is MainAction.Internal.ResizeHasBeenRequested -> handleResizeHasBeenRequested()
         }
     }
 
@@ -296,6 +298,10 @@ class MainViewModel @Inject constructor(
         sendEvent(MainEvent.NavigateToCookieAcquisition)
     }
 
+    private fun handleResizeHasBeenRequested() {
+        mutableStateFlow.update { it.copy(hasResizeBeenRequested = true) }
+    }
+
     private fun handleFirstIntentReceived(action: MainAction.ReceiveFirstIntent) {
         handleIntent(
             intent = action.intent,
@@ -517,6 +523,7 @@ data class MainState(
     val theme: AppTheme,
     val isScreenCaptureAllowed: Boolean,
     val isDynamicColorsEnabled: Boolean,
+    val hasResizeBeenRequested: Boolean,
 ) : Parcelable {
     /**
      * Contains all feature flags that are available to the UI.
@@ -620,6 +627,11 @@ sealed class MainAction {
          * should proceed.
          */
         data object CookieAcquisitionReady : Internal()
+
+        /**
+         * Indicates that resize has been requested on the Activity
+         */
+        data object ResizeHasBeenRequested : Internal()
     }
 }
 
diff --git a/app/src/test/kotlin/com/x8bit/bitwarden/MainViewModelTest.kt b/app/src/test/kotlin/com/x8bit/bitwarden/MainViewModelTest.kt
index 19cff30ab86..d97592d749e 100644
--- a/app/src/test/kotlin/com/x8bit/bitwarden/MainViewModelTest.kt
+++ b/app/src/test/kotlin/com/x8bit/bitwarden/MainViewModelTest.kt
@@ -1185,6 +1185,30 @@ class MainViewModelTest : BaseViewModelTest() {
             }
         }
 
+    @Test
+    fun `on handleResizeHasBeenRequested should set hasResizeBeenRequested as true`() = runTest {
+        val viewModel = createViewModel()
+        val initialState = MainState(
+            theme = settingsRepository.appTheme,
+            isScreenCaptureAllowed = settingsRepository.isScreenCaptureAllowed,
+            isDynamicColorsEnabled = settingsRepository.isDynamicColorsEnabled,
+            hasResizeBeenRequested = false,
+        )
+        viewModel.stateFlow.test {
+            assertEquals(
+                initialState,
+                awaitItem(),
+            )
+            viewModel.trySendAction(MainAction.Internal.ResizeHasBeenRequested)
+            assertEquals(
+                initialState.copy(
+                    hasResizeBeenRequested = true,
+                ),
+                awaitItem(),
+            )
+        }
+    }
+
     private fun createViewModel(
         initialSpecialCircumstance: SpecialCircumstance? = null,
     ) = MainViewModel(
@@ -1213,6 +1237,7 @@ private val DEFAULT_STATE: MainState = MainState(
     theme = AppTheme.DEFAULT,
     isScreenCaptureAllowed = true,
     isDynamicColorsEnabled = false,
+    hasResizeBeenRequested = false,
 )
 
 private val DEFAULT_FIRST_TIME_STATE = FirstTimeState(