From 865a0b45072e5749b6082e895d94c2ee94a6e3ea Mon Sep 17 00:00:00 2001
From: necrashter <iiilker99@gmail.com>
Date: Sun, 5 Mar 2023 00:37:49 +0300
Subject: Use the new API for virtual keyboard height detection on Android,
 bugfix

(cherry picked from commit 61549edef0c4e8cadf3bf1847c29328b598a25ff)
---
 .../java/lib/src/org/godotengine/godot/Godot.java  | 70 +++++++++++++++++++---
 1 file changed, 62 insertions(+), 8 deletions(-)

(limited to 'platform')

diff --git a/platform/android/java/lib/src/org/godotengine/godot/Godot.java b/platform/android/java/lib/src/org/godotengine/godot/Godot.java
index a03da7292b..9b65a52b70 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/Godot.java
+++ b/platform/android/java/lib/src/org/godotengine/godot/Godot.java
@@ -74,10 +74,14 @@ import android.util.Log;
 import android.view.Display;
 import android.view.LayoutInflater;
 import android.view.Surface;
+import android.view.SurfaceView;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewGroup.LayoutParams;
+import android.view.ViewTreeObserver;
 import android.view.Window;
+import android.view.WindowInsets;
+import android.view.WindowInsetsAnimation;
 import android.view.WindowManager;
 import android.widget.Button;
 import android.widget.FrameLayout;
@@ -291,14 +295,64 @@ public class Godot extends Fragment implements SensorEventListener, IDownloaderC
 		editText.setView(mRenderView);
 		io.setEdit(editText);
 
-		view.getViewTreeObserver().addOnGlobalLayoutListener(() -> {
-			Point fullSize = new Point();
-			activity.getWindowManager().getDefaultDisplay().getSize(fullSize);
-			Rect gameSize = new Rect();
-			mRenderView.getView().getWindowVisibleDisplayFrame(gameSize);
-			final int keyboardHeight = fullSize.y - gameSize.bottom;
-			GodotLib.setVirtualKeyboardHeight(keyboardHeight);
-		});
+		// Listeners for keyboard height.
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+			// Report the height of virtual keyboard as it changes during the animation.
+			final View decorView = activity.getWindow().getDecorView();
+			decorView.setWindowInsetsAnimationCallback(new WindowInsetsAnimation.Callback(WindowInsetsAnimation.Callback.DISPATCH_MODE_STOP) {
+				int startBottom, endBottom;
+				@Override
+				public void onPrepare(@NonNull WindowInsetsAnimation animation) {
+					startBottom = decorView.getRootWindowInsets().getInsets(WindowInsets.Type.ime()).bottom;
+				}
+
+				@NonNull
+				@Override
+				public WindowInsetsAnimation.Bounds onStart(@NonNull WindowInsetsAnimation animation, @NonNull WindowInsetsAnimation.Bounds bounds) {
+					endBottom = decorView.getRootWindowInsets().getInsets(WindowInsets.Type.ime()).bottom;
+					return bounds;
+				}
+
+				@NonNull
+				@Override
+				public WindowInsets onProgress(@NonNull WindowInsets windowInsets, @NonNull List<WindowInsetsAnimation> list) {
+					// Find the IME animation.
+					WindowInsetsAnimation imeAnimation = null;
+					for (WindowInsetsAnimation animation : list) {
+						if ((animation.getTypeMask() & WindowInsets.Type.ime()) != 0) {
+							imeAnimation = animation;
+							break;
+						}
+					}
+					// Update keyboard height based on IME animation.
+					if (imeAnimation != null) {
+						float interpolatedFraction = imeAnimation.getInterpolatedFraction();
+						// Linear interpolation between start and end values.
+						float keyboardHeight = startBottom * (1.0f - interpolatedFraction) + endBottom * interpolatedFraction;
+						GodotLib.setVirtualKeyboardHeight((int)keyboardHeight);
+					}
+					return windowInsets;
+				}
+
+				@Override
+				public void onEnd(@NonNull WindowInsetsAnimation animation) {
+				}
+			});
+		} else {
+			// Infer the virtual keyboard height using visible area.
+			view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+				// Don't allocate a new Rect every time the callback is called.
+				final Rect visibleSize = new Rect();
+
+				@Override
+				public void onGlobalLayout() {
+					final SurfaceView view = mRenderView.getView();
+					view.getWindowVisibleDisplayFrame(visibleSize);
+					final int keyboardHeight = view.getHeight() - visibleSize.bottom;
+					GodotLib.setVirtualKeyboardHeight(keyboardHeight);
+				}
+			});
+		}
 
 		mRenderView.queueOnRenderThread(() -> {
 			for (GodotPlugin plugin : pluginRegistry.getAllPlugins()) {
-- 
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