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// 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.
#include <list>
#include "base/android/jni_weak_ref.h"
#include "base/memory/ref_counted.h"
#include "ui/android/ui_android_export.h"
#include "ui/gfx/geometry/rect_f.h"
class GURL;
namespace cc {
class Layer;
namespace ui {
class WindowAndroid;
// A simple container for a UI layer.
// At the root of the hierarchy is a WindowAndroid, when attached.
class UI_ANDROID_EXPORT ViewAndroid {
// Stores an anchored view to delete itself at the end of its lifetime
// automatically. This helps manage the lifecyle without the dependency
// on |ViewAndroid|.
class ScopedAnchorView {
ScopedAnchorView(JNIEnv* env,
const base::android::JavaRef<jobject>& jview,
const base::android::JavaRef<jobject>& jdelegate);
ScopedAnchorView(ScopedAnchorView&& other);
ScopedAnchorView& operator=(ScopedAnchorView&& other);
// Calls JNI removeView() on the delegate for cleanup.
void Reset();
const base::android::ScopedJavaLocalRef<jobject> view() const;
// TODO(jinsukkim): Following weak refs can be cast to strong refs which
// cannot be garbage-collected and leak memory. Rewrite not to use them.
// see comments in
JavaObjectWeakGlobalRef view_;
JavaObjectWeakGlobalRef delegate_;
// Default copy/assign disabled by move constructor.
// A ViewAndroid may have its own delegate or otherwise will
// use the next available parent's delegate.
ViewAndroid(const base::android::JavaRef<jobject>& delegate);
virtual ~ViewAndroid();
// The content offset is in CSS pixels, and is used to translate
// snapshots to the correct part of the view.
void set_content_offset(const gfx::Vector2dF& content_offset) {
content_offset_ = content_offset;
gfx::Vector2dF content_offset() const {
return content_offset_;
// Returns the window at the root of this hierarchy, or |null|
// if disconnected.
virtual WindowAndroid* GetWindowAndroid() 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);
void SetDelegate(const base::android::JavaRef<jobject>& delegate);
// Adds this view as a child of another view.
void AddChild(ViewAndroid* child);
// Detaches this view from its parent.
void RemoveFromParent();
bool StartDragAndDrop(const base::android::JavaRef<jstring>& jtext,
const base::android::JavaRef<jobject>& jimage);
void OnBackgroundColorChanged(unsigned int color);
void OnTopControlsChanged(float top_controls_offset,
float top_content_offset);
void OnBottomControlsChanged(float bottom_controls_offset,
float bottom_content_offset);
void StartContentIntent(const GURL& content_url, bool is_main_frame);
ScopedAnchorView AcquireAnchorView();
void SetAnchorRect(const base::android::JavaRef<jobject>& anchor,
const gfx::RectF& bounds);
// This may return null.
base::android::ScopedJavaLocalRef<jobject> GetContainerView();
ViewAndroid* parent_;
void RemoveChild(ViewAndroid* child);
// 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::ScopedJavaLocalRef<jobject>
GetViewAndroidDelegate() const;
std::list<ViewAndroid*> children_;
scoped_refptr<cc::Layer> layer_;
JavaObjectWeakGlobalRef delegate_;
gfx::Vector2dF content_offset_; // in CSS pixel
} // namespace ui