Implement animation for TRANSIT_MINIMIZE

With this CL, the minimize button plays the same animation
as that played when the window limit minimizes a window.

Flag: com.android.window.flags.enable_minimize_button
Bug: 369349585
Test: manual
Test: WMShellUnitTests
Change-Id: Ie43161f8b85d1ca01972a470eb51f750b8bdb94b

1 files changed, 24 insertions, 3 deletions

diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionHandler.java b/libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionHandler.java
index 58337ece0991..e848b889b314 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionHandler.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/freeform/FreeformTaskTransitionHandler.java
@@ -27,6 +27,7 @@ import android.app.WindowConfiguration;
 import android.graphics.Rect;
 import android.os.IBinder;
 import android.util.ArrayMap;
+import android.util.DisplayMetrics;
 import android.view.SurfaceControl;
 import android.view.WindowManager;
 import android.window.TransitionInfo;
@@ -38,6 +39,7 @@ import androidx.annotation.Nullable;
 
 import com.android.wm.shell.common.DisplayController;
 import com.android.wm.shell.common.ShellExecutor;
+import com.android.wm.shell.shared.animation.MinimizeAnimator;
 import com.android.wm.shell.transition.Transitions;
 
 import java.util.ArrayList;
@@ -137,7 +139,7 @@ public class FreeformTaskTransitionHandler
                     break;
                 case WindowManager.TRANSIT_TO_BACK:
                     transitionHandled |= startMinimizeTransition(
-                            transition, info.getType(), change);
+                            transition, info.getType(), change, finishT, animations, onAnimFinish);
                     break;
                 case WindowManager.TRANSIT_CLOSE:
                     if (change.getTaskInfo().getWindowingMode() == WINDOWING_MODE_FREEFORM) {
@@ -206,7 +208,10 @@ public class FreeformTaskTransitionHandler
     private boolean startMinimizeTransition(
             IBinder transition,
             int type,
-            TransitionInfo.Change change) {
+            TransitionInfo.Change change,
+            SurfaceControl.Transaction finishT,
+            ArrayList<Animator> animations,
+            Runnable onAnimFinish) {
         if (!mPendingTransitionTokens.contains(transition)) {
             return false;
         }
@@ -215,7 +220,23 @@ public class FreeformTaskTransitionHandler
         if (type != Transitions.TRANSIT_MINIMIZE) {
             return false;
         }
-        // TODO(b/361524575): Add minimize animations
+
+        SurfaceControl.Transaction t = new SurfaceControl.Transaction();
+        SurfaceControl sc = change.getLeash();
+        finishT.hide(sc);
+        final DisplayMetrics displayMetrics =
+                mDisplayController
+                        .getDisplayContext(taskInfo.displayId).getResources().getDisplayMetrics();
+        final Animator animator = MinimizeAnimator.create(
+                displayMetrics,
+                change,
+                t,
+                (anim) -> {
+                    animations.remove(anim);
+                    onAnimFinish.run();
+                    return null;
+                });
+        animations.add(animator);
         return true;
     }