Merge "Adding a compat class to listen for exclusion rect changes" into qt-dev

am: 14aabea07c

Change-Id: I5b9e7569cb81ed04bca887f522cb906524beb0e3

packages/SystemUI/shared/src/com/android/systemui/shared/system/SystemGestureExclusionListenerCompat.java

@@ -0,0 +1,85 @@
+/**
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.systemui.shared.system;
+
+import android.graphics.Region;
+import android.os.RemoteException;
+import android.util.Log;
+import android.view.ISystemGestureExclusionListener;
+import android.view.WindowManagerGlobal;
+
+/**
+ * Utility class to listen for exclusion rect changes.
+ */
+public abstract class SystemGestureExclusionListenerCompat {
+
+    private static final String TAG = "SGEListenerCompat";
+
+    private final int mDisplayId;
+
+    private ISystemGestureExclusionListener mGestureExclusionListener =
+            new ISystemGestureExclusionListener.Stub() {
+                @Override
+                public void onSystemGestureExclusionChanged(int displayId,
+                        Region systemGestureExclusion) {
+                    if (displayId == mDisplayId) {
+                        onExclusionChanged(systemGestureExclusion);
+                    }
+                }
+            };
+    private boolean mRegistered;
+
+    public SystemGestureExclusionListenerCompat(int displayId) {
+        mDisplayId = displayId;
+    }
+
+    /**
+     * Called when the exclusion region has changed
+     */
+    public abstract void onExclusionChanged(Region systemGestureExclusion);
+
+    /**
+     * Registers the listener for getting exclusion rect changes.
+     */
+    public void register() {
+        if (!mRegistered) {
+            try {
+                WindowManagerGlobal.getWindowManagerService()
+                        .registerSystemGestureExclusionListener(
+                                mGestureExclusionListener, mDisplayId);
+                mRegistered = true;
+            } catch (RemoteException e) {
+                Log.e(TAG, "Failed to register window manager callbacks", e);
+            }
+        }
+    }
+
+    /**
+     * Unregisters the receiver if previously registered
+     */
+    public void unregister() {
+        if (mRegistered) {
+            try {
+                WindowManagerGlobal.getWindowManagerService()
+                        .unregisterSystemGestureExclusionListener(
+                                mGestureExclusionListener, mDisplayId);
+                mRegistered = false;
+            } catch (RemoteException e) {
+                Log.e(TAG, "Failed to unregister window manager callbacks", e);
+            }
+        }
+    }
+}