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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.
#ifndef UI_ANDROID_VIEW_ANDROID_H_
#define UI_ANDROID_VIEW_ANDROID_H_
#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"
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 {
public:
// 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 {
public:
ScopedAnchorView(JNIEnv* env,
const base::android::JavaRef<jobject>& jview,
const base::android::JavaRef<jobject>& jdelegate);
ScopedAnchorView();
ScopedAnchorView(ScopedAnchorView&& other);
ScopedAnchorView& operator=(ScopedAnchorView&& other);
// Calls JNI removeView() on the delegate for cleanup.
~ScopedAnchorView();
void Reset();
const base::android::ScopedJavaLocalRef<jobject> view() const;
private:
// 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 crrev.com/2103243002.
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);
ViewAndroid();
virtual ~ViewAndroid();
// 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);
// 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);
ScopedAnchorView AcquireAnchorView();
void SetAnchorRect(const base::android::JavaRef<jobject>& anchor,
const gfx::RectF& bounds);
protected:
ViewAndroid* parent_;
private:
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_;
DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
};
} // namespace ui
#endif // UI_ANDROID_VIEW_ANDROID_H_