Merge "Use boundsChangeTransaction to improve split-screen enter/exit…

…" into rvc-dev

core/java/android/view/WindowlessWindowManager.java

@@ -209,7 +209,11 @@ private boolean isOpaque(WindowManager.LayoutParams attrs) {
 
     /** @hide */
     protected SurfaceControl getSurfaceControl(View rootView) {
-        final State s = mStateForWindow.get(rootView.getViewRootImpl().mWindow.asBinder());
+        final ViewRootImpl root = rootView.getViewRootImpl();
+        if (root == null) {
+            return null;
+        }
+        final State s = mStateForWindow.get(root.mWindow.asBinder());
         if (s == null) {
             return null;
         }

core/java/android/window/WindowContainerTransaction.java

@@ -264,6 +264,29 @@ public WindowContainerTransaction reorder(@NonNull WindowContainerToken child, b
         return this;
     }
 
+    /**
+     * Merges another WCT into this one.
+     * @param transfer When true, this will transfer everything from other potentially leaving
+     *                 other in an unusable state. When false, other is left alone, but
+     *                 SurfaceFlinger Transactions will not be merged.
+     * @hide
+     */
+    public void merge(WindowContainerTransaction other, boolean transfer) {
+        for (int i = 0, n = other.mChanges.size(); i < n; ++i) {
+            final IBinder key = other.mChanges.keyAt(i);
+            Change existing = mChanges.get(key);
+            if (existing == null) {
+                existing = new Change();
+                mChanges.put(key, existing);
+            }
+            existing.merge(other.mChanges.valueAt(i), transfer);
+        }
+        for (int i = 0, n = other.mHierarchyOps.size(); i < n; ++i) {
+            mHierarchyOps.add(transfer ? other.mHierarchyOps.get(i)
+                    : new HierarchyOp(other.mHierarchyOps.get(i)));
+        }
+    }
+
     /** @hide */
     public Map<IBinder, Change> getChanges() {
         return mChanges;
@@ -359,6 +382,41 @@ protected Change(Parcel in) {
             mActivityWindowingMode = in.readInt();
         }
 
+        /**
+         * @param transfer When true, this will transfer other into this leaving other in an
+         *                 undefined state. Use this if you don't intend to use other. When false,
+         *                 SurfaceFlinger Transactions will not merge.
+         */
+        public void merge(Change other, boolean transfer) {
+            mConfiguration.setTo(other.mConfiguration, other.mConfigSetMask, other.mWindowSetMask);
+            mConfigSetMask |= other.mConfigSetMask;
+            mWindowSetMask |= other.mWindowSetMask;
+            if ((other.mChangeMask & CHANGE_FOCUSABLE) != 0) {
+                mFocusable = other.mFocusable;
+            }
+            if (transfer && (other.mChangeMask & CHANGE_BOUNDS_TRANSACTION) != 0) {
+                mBoundsChangeTransaction = other.mBoundsChangeTransaction;
+                other.mBoundsChangeTransaction = null;
+            }
+            if ((other.mChangeMask & CHANGE_PIP_CALLBACK) != 0) {
+                mPinnedBounds = transfer ? other.mPinnedBounds : new Rect(other.mPinnedBounds);
+            }
+            if ((other.mChangeMask & CHANGE_HIDDEN) != 0) {
+                mHidden = other.mHidden;
+            }
+            mChangeMask |= other.mChangeMask;
+            if (other.mActivityWindowingMode >= 0) {
+                mActivityWindowingMode = other.mActivityWindowingMode;
+            }
+            if (other.mWindowingMode >= 0) {
+                mWindowingMode = other.mWindowingMode;
+            }
+            if (other.mBoundsChangeSurfaceBounds != null) {
+                mBoundsChangeSurfaceBounds = transfer ? other.mBoundsChangeSurfaceBounds
+                        : new Rect(other.mBoundsChangeSurfaceBounds);
+            }
+        }
+
         public int getWindowingMode() {
             return mWindowingMode;
         }
@@ -522,6 +580,12 @@ public HierarchyOp(@NonNull IBinder container, boolean toTop) {
             mToTop = toTop;
         }
 
+        public HierarchyOp(@NonNull HierarchyOp copy) {
+            mContainer = copy.mContainer;
+            mReparent = copy.mReparent;
+            mToTop = copy.mToTop;
+        }
+
         protected HierarchyOp(Parcel in) {
             mContainer = in.readStrongBinder();
             mReparent = in.readStrongBinder();

packages/SystemUI/src/com/android/systemui/stackdivider/Divider.java

@@ -99,16 +99,19 @@ public class Divider extends SystemUI implements DividerView.DividerCallbacks,
     private Handler mHandler;
     private KeyguardStateController mKeyguardStateController;
 
+    private WindowManagerProxy mWindowManagerProxy;
+
     private final ArrayList<WeakReference<Consumer<Boolean>>> mDockedStackExistsListeners =
             new ArrayList<>();
 
     private SplitScreenTaskOrganizer mSplits = new SplitScreenTaskOrganizer(this);
 
     private DisplayChangeController.OnDisplayChangingListener mRotationController =
-            (display, fromRotation, toRotation, t) -> {
-                if (!mSplits.isSplitScreenSupported()) {
+            (display, fromRotation, toRotation, wct) -> {
+                if (!mSplits.isSplitScreenSupported() || mWindowManagerProxy == null) {
                     return;
                 }
+                WindowContainerTransaction t = new WindowContainerTransaction();
                 DisplayLayout displayLayout =
                         new DisplayLayout(mDisplayController.getDisplayLayout(display));
                 SplitDisplayLayout sdl = new SplitDisplayLayout(mContext, displayLayout, mSplits);
@@ -127,6 +130,17 @@ public class Divider extends SystemUI implements DividerView.DividerCallbacks,
                 if (isSplitActive()) {
                     WindowManagerProxy.applyHomeTasksMinimized(sdl, mSplits.mSecondary.token, t);
                 }
+                if (mWindowManagerProxy.queueSyncTransactionIfWaiting(t)) {
+                    // Because sync transactions are serialized, its possible for an "older"
+                    // bounds-change to get applied after a screen rotation. In that case, we
+                    // want to actually defer on that rather than apply immediately. Of course,
+                    // this means that the bounds may not change until after the rotation so
+                    // the user might see some artifacts. This should be rare.
+                    Slog.w(TAG, "Screen rotated while other operations were pending, this may"
+                            + " result in some graphical artifacts.");
+                } else {
+                    wct.merge(t, true /* transfer */);
+                }
             };
 
     private final DividerImeController mImePositionProcessor;
@@ -159,6 +173,7 @@ public Divider(Context context, Optional<Lazy<Recents>> recentsOptionalLazy,
         mRecentsOptionalLazy = recentsOptionalLazy;
         mForcedResizableController = new ForcedResizableInfoActivityController(context, this);
         mTransactionPool = transactionPool;
+        mWindowManagerProxy = new WindowManagerProxy(mTransactionPool, mHandler);
         mImePositionProcessor = new DividerImeController(mSplits, mTransactionPool, mHandler);
     }
 
@@ -278,9 +293,9 @@ private void addDivider(Configuration configuration) {
                 LayoutInflater.from(dctx).inflate(R.layout.docked_stack_divider, null);
         DisplayLayout displayLayout = mDisplayController.getDisplayLayout(mContext.getDisplayId());
         mView.injectDependencies(mWindowManager, mDividerState, this, mSplits, mSplitLayout,
-                mImePositionProcessor);
+                mImePositionProcessor, mWindowManagerProxy);
         mView.setVisibility(mVisible ? View.VISIBLE : View.INVISIBLE);
-        mView.setMinimizedDockStack(mMinimized, mHomeStackResizable);
+        mView.setMinimizedDockStack(mMinimized, mHomeStackResizable, null /* transaction */);
         final int size = dctx.getResources().getDimensionPixelSize(
                 com.android.internal.R.dimen.docked_stack_divider_thickness);
         final boolean landscape = configuration.orientation == ORIENTATION_LANDSCAPE;
@@ -303,7 +318,7 @@ private void update(Configuration configuration) {
         addDivider(configuration);
 
         if (mMinimized) {
-            mView.setMinimizedDockStack(true, mHomeStackResizable);
+            mView.setMinimizedDockStack(true, mHomeStackResizable, null /* transaction */);
             updateTouchable();
         }
         mView.setHidden(isDividerHidden);
@@ -327,11 +342,13 @@ private void updateVisibility(final boolean visible) {
             if (visible) {
                 mView.enterSplitMode(mHomeStackResizable);
                 // Update state because animations won't finish.
-                mView.setMinimizedDockStack(mMinimized, mHomeStackResizable);
+                mWindowManagerProxy.runInSync(
+                        t -> mView.setMinimizedDockStack(mMinimized, mHomeStackResizable, t));
+
             } else {
                 mView.exitSplitMode();
-                // un-minimize so that next entry triggers minimize anim.
-                mView.setMinimizedDockStack(false /* minimized */, mHomeStackResizable);
+                mWindowManagerProxy.runInSync(
+                        t -> mView.setMinimizedDockStack(false, mHomeStackResizable, t));
             }
             // Notify existence listeners
             synchronized (mDockedStackExistsListeners) {
@@ -344,12 +361,6 @@ private void updateVisibility(final boolean visible) {
         }
     }
 
-    void onSplitDismissed() {
-        updateVisibility(false /* visible */);
-        mMinimized = false;
-        removeDivider();
-    }
-
     /** Switch to minimized state if appropriate */
     public void setMinimized(final boolean minimized) {
         if (DEBUG) Slog.d(TAG, "posting ext setMinimized " + minimized + " vis:" + mVisible);
@@ -405,7 +416,7 @@ private void setHomeMinimized(final boolean minimized, boolean homeStackResizabl
             }
         }
         updateTouchable();
-        WindowOrganizer.applyTransaction(wct);
+        mWindowManagerProxy.applySyncTransaction(wct);
     }
 
     void setAdjustedForIme(boolean adjustedForIme) {
@@ -501,7 +512,14 @@ void startEnterSplit() {
         update(mDisplayController.getDisplayContext(
                 mContext.getDisplayId()).getResources().getConfiguration());
         // Set resizable directly here because applyEnterSplit already resizes home stack.
-        mHomeStackResizable = WindowManagerProxy.applyEnterSplit(mSplits, mSplitLayout);
+        mHomeStackResizable = mWindowManagerProxy.applyEnterSplit(mSplits, mSplitLayout);
+    }
+
+    void startDismissSplit() {
+        mWindowManagerProxy.applyDismissSplit(mSplits, mSplitLayout, true /* dismissOrMaximize */);
+        updateVisibility(false /* visible */);
+        mMinimized = false;
+        removeDivider();
     }
 
     void ensureMinimizedSplit() {
@@ -530,6 +548,10 @@ SplitDisplayLayout getSplitLayout() {
         return mSplitLayout;
     }
 
+    WindowManagerProxy getWmProxy() {
+        return mWindowManagerProxy;
+    }
+
     /** @return the container token for the secondary split root task. */
     public WindowContainerToken getSecondaryRoot() {
         if (mSplits == null || mSplits.mSecondary == null) {

packages/SystemUI/src/com/android/systemui/stackdivider/DividerImeController.java

@@ -29,7 +29,6 @@
 import android.window.TaskOrganizer;
 import android.window.WindowContainerToken;
 import android.window.WindowContainerTransaction;
-import android.window.WindowOrganizer;
 
 import androidx.annotation.Nullable;
 
@@ -213,7 +212,7 @@ private void updateImeAdjustState() {
                     SCREEN_WIDTH_DP_UNDEFINED, SCREEN_HEIGHT_DP_UNDEFINED);
         }
 
-        WindowOrganizer.applyTransaction(wct);
+        mSplits.mDivider.getWmProxy().applySyncTransaction(wct);
 
         // Update all the adjusted-for-ime states
         if (!mPaused) {