Android: Extend ViewAndroid

ui/android/view_android.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_ANDROID_VIEW_ANDROID_H_
 #define UI_ANDROID_VIEW_ANDROID_H_
 
+#include <list>
+
 #include "base/android/scoped_java_ref.h"
+#include "base/memory/ref_counted.h"
 #include "ui/android/ui_android_export.h"
 
+namespace cc {
+class Layer;
+}
+
 namespace ui {
 
 class WindowAndroid;
 
-// This is a NativeView interface for getting access to
-// WindowAndroid(NativeWindow).
+// A simple container for a UI layer.
+// At the root of the hierarchy is a WindowAndroid.
+//
 class UI_ANDROID_EXPORT ViewAndroid {
  public:
-  virtual WindowAndroid* GetWindowAndroid() const = 0;
+  // Used to construct a root view.
+  ViewAndroid(const base::android::JavaRef<jobject>& delegate,
+              WindowAndroid* root_window);
 
-  virtual base::android::ScopedJavaLocalRef<jobject>
-      GetViewAndroidDelegate() const = 0 ;
+  // Used to construct a child view.
+  ViewAndroid();
+  ~ViewAndroid();
 
- protected:
-  virtual ~ViewAndroid() {}
+  // Returns the window at the root of this hierarchy, or |null|
+  // if disconnected.
+  WindowAndroid* GetWindowAndroid() const;
+
+  // Set the root |WindowAndroid|. This is only valid for root
+  // nodes and must not be called for children.
+  void SetWindowAndroid(WindowAndroid* root_window);
+
+  // Returns the Java delegate for this view. This is used to delegate work
+  // up to the embedding view (or the embedder that can deal with the
+  // implementation details).
+  const base::android::JavaRef<jobject>& GetViewAndroidDelegate() const;
+
+  // Used to return and set the layer for this view. May be |null|.
+  cc::Layer* GetLayer() const;
+  void SetLayer(scoped_refptr<cc::Layer> layer);
+
+  // Add/remove this view as a child of another view.
+  void AddChild(ViewAndroid* child);
+  void RemoveChild(ViewAndroid* child);
+
+ private:
+  ViewAndroid* parent_;
+  std::list<ViewAndroid*> children_;
+  WindowAndroid* window_;
+  scoped_refptr<cc::Layer> layer_;
+  base::android::ScopedJavaGlobalRef<jobject> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
 };
 
 }  // namespace ui
 
 #endif  // UI_ANDROID_VIEW_ANDROID_H_