Merge "Adding a compatibility implementation for WindowCallbacks" into pi-dev

am: 358840b0cb

Change-Id: Iea7f86fd71d63a8ceb7685b0051589b4afb2a8ea

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

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2018 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.Canvas;
+import android.graphics.Rect;
+import android.view.DisplayListCanvas;
+import android.view.View;
+import android.view.ViewRootImpl;
+import android.view.WindowCallbacks;
+
+public class WindowCallbacksCompat {
+
+    private final WindowCallbacks mWindowCallbacks = new WindowCallbacks() {
+        @Override
+        public void onWindowSizeIsChanging(Rect newBounds, boolean fullscreen, Rect systemInsets,
+                Rect stableInsets) {
+            WindowCallbacksCompat.this.onWindowSizeIsChanging(newBounds, fullscreen, systemInsets,
+                    stableInsets);
+        }
+
+        @Override
+        public void onWindowDragResizeStart(Rect initialBounds, boolean fullscreen,
+                Rect systemInsets, Rect stableInsets, int resizeMode) {
+            WindowCallbacksCompat.this.onWindowDragResizeStart(initialBounds, fullscreen,
+                    systemInsets, stableInsets, resizeMode);
+        }
+
+        @Override
+        public void onWindowDragResizeEnd() {
+            WindowCallbacksCompat.this.onWindowDragResizeEnd();
+        }
+
+        @Override
+        public boolean onContentDrawn(int offsetX, int offsetY, int sizeX, int sizeY) {
+            return WindowCallbacksCompat.this.onContentDrawn(offsetX, offsetY, sizeX, sizeY);
+        }
+
+        @Override
+        public void onRequestDraw(boolean reportNextDraw) {
+            WindowCallbacksCompat.this.onRequestDraw(reportNextDraw);
+        }
+
+        @Override
+        public void onPostDraw(DisplayListCanvas canvas) {
+            WindowCallbacksCompat.this.onPostDraw(canvas);
+        }
+    };
+
+    public void onWindowSizeIsChanging(Rect newBounds, boolean fullscreen, Rect systemInsets,
+            Rect stableInsets) { }
+
+    public void onWindowDragResizeStart(Rect initialBounds, boolean fullscreen, Rect systemInsets,
+            Rect stableInsets, int resizeMode) { }
+
+    public void onWindowDragResizeEnd() { }
+
+    public boolean onContentDrawn(int offsetX, int offsetY, int sizeX, int sizeY) {
+        return false;
+    }
+
+    public void onRequestDraw(boolean reportNextDraw) { }
+
+    public void onPostDraw(Canvas canvas) { }
+
+    public final boolean addToView(View view) {
+        ViewRootImpl root = view.getViewRootImpl();
+        if (root != null) {
+            root.addWindowCallbacks(mWindowCallbacks);
+            root.requestInvalidateRootRenderNode();
+            return true;
+        }
+        return false;
+    }
+
+    public final void removeFromView(View view) {
+        ViewRootImpl root = view.getViewRootImpl();
+        if (root != null) {
+            root.removeWindowCallbacks(mWindowCallbacks);
+        }
+    }
+}