android: Add support for split foldable view

src/android/app/src/main/java/org/yuzu/yuzu_emu/activities/EmulationActivity.kt

@@ -26,6 +26,12 @@ import androidx.core.content.getSystemService
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
+import androidx.window.layout.WindowInfoTracker
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import org.yuzu.yuzu_emu.NativeLibrary
 import org.yuzu.yuzu_emu.R
 import org.yuzu.yuzu_emu.fragments.EmulationFragment
@@ -96,6 +102,14 @@ class EmulationActivity : AppCompatActivity(), SensorEventListener {
         inputHandler = InputHandler()
         inputHandler.initialize()
 
+        lifecycleScope.launch(Dispatchers.Main) {
+            lifecycle.repeatOnLifecycle(Lifecycle.State.STARTED) {
+                WindowInfoTracker.getOrCreate(this@EmulationActivity)
+                    .windowLayoutInfo(this@EmulationActivity)
+                    .collect { emulationFragment?.updateCurrentLayout(this@EmulationActivity, it) }
+            }
+        }
+
         // Start a foreground service to prevent the app from getting killed in the background
         val startIntent = Intent(this, ForegroundService::class.java)
         startForegroundService(startIntent)

src/android/app/src/main/java/org/yuzu/yuzu_emu/fragments/EmulationFragment.kt

@@ -8,10 +8,13 @@ import android.app.AlertDialog
 import android.content.Context
 import android.content.DialogInterface
 import android.content.SharedPreferences
+import android.content.pm.ActivityInfo
+import android.content.res.Resources
 import android.graphics.Color
 import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
+import android.util.TypedValue
 import android.view.*
 import android.widget.TextView
 import androidx.activity.OnBackPressedCallback
@@ -20,8 +23,11 @@ import androidx.core.content.res.ResourcesCompat
 import androidx.core.graphics.Insets
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.updatePadding
 import androidx.fragment.app.Fragment
 import androidx.preference.PreferenceManager
+import androidx.window.layout.FoldingFeature
+import androidx.window.layout.WindowLayoutInfo
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.slider.Slider
 import org.yuzu.yuzu_emu.NativeLibrary
@@ -211,6 +217,33 @@ class EmulationFragment : Fragment(), SurfaceHolder.Callback {
         }
     }
 
+    private val Number.toPx get() = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, this.toFloat(), Resources.getSystem().displayMetrics).toInt()
+
+    fun updateCurrentLayout(emulationActivity: EmulationActivity, newLayoutInfo: WindowLayoutInfo) {
+        val isFolding = (newLayoutInfo.displayFeatures.find { it is FoldingFeature } as? FoldingFeature)?.let {
+            if (it.isSeparating) {
+                emulationActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
+                if (it.orientation == FoldingFeature.Orientation.HORIZONTAL) {
+                    binding.surfaceEmulation.layoutParams.height = it.bounds.top
+                    binding.inGameMenu.layoutParams.height = it.bounds.bottom
+                    binding.overlayContainer.layoutParams.height = it.bounds.bottom - 48.toPx
+                    binding.overlayContainer.updatePadding(0, 0, 0, 24.toPx)
+                }
+            }
+            it.isSeparating
+        } ?: false
+        if (!isFolding) {
+            binding.surfaceEmulation.layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
+            binding.inGameMenu.layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
+            binding.overlayContainer.layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
+            binding.overlayContainer.updatePadding(0, 0, 0, 0)
+            emulationActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE
+        }
+        binding.surfaceInputOverlay.requestLayout()
+        binding.inGameMenu.requestLayout()
+        binding.overlayContainer.requestLayout()
+    }
+
     override fun surfaceCreated(holder: SurfaceHolder) {
         // We purposely don't do anything here.
         // All work is done in surfaceChanged, which we are guaranteed to get even for surface creation.

src/android/app/src/main/res/layout/fragment_emulation.xml

@@ -20,6 +20,12 @@
             android:focusable="false"
             android:focusableInTouchMode="false" />
 
+        <FrameLayout
+            android:id="@+id/overlay_container"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_gravity="bottom">
+
         <!-- This is the onscreen input overlay -->
         <org.yuzu.yuzu_emu.overlay.InputOverlay
             android:id="@+id/surface_input_overlay"
@@ -48,6 +54,7 @@
             android:layout_gravity="center"
             android:text="@string/emulation_done"
             android:visibility="gone" />
+        </FrameLayout>
 
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
@@ -55,7 +62,7 @@
         android:id="@+id/in_game_menu"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
-        android:layout_gravity="start"
+        android:layout_gravity="start|bottom"
         app:headerLayout="@layout/header_in_game"
         app:menu="@menu/menu_in_game" />