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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_ANDROID_LAYOUTS_SCENE_LAYER_H_
#define CHROME_BROWSER_UI_ANDROID_LAYOUTS_SCENE_LAYER_H_
#include <jni.h>
#include "base/android/jni_weak_ref.h"
#include "base/android/scoped_java_ref.h"
#include "base/memory/scoped_refptr.h"
#include "cc/slim/layer.h"
#include "third_party/skia/include/core/SkColor.h"
namespace android {
// A native-side, cc::slim::Layer based representation of how a scene should be
// drawn. Basically, this is a wrapper around cc::slim::Layer and bridge with
// its Java counterpart.
class SceneLayer {
public:
static SceneLayer* FromJavaObject(
JNIEnv* env,
const base::android::JavaRef<jobject>& jobj);
// Create SceneLayer and creates an empty cc::slim::Layer.
SceneLayer(JNIEnv* env, const base::android::JavaRef<jobject>& jobj);
// Create SceneLayer with the already-instantiated |layer|.
SceneLayer(JNIEnv* env,
const base::android::JavaRef<jobject>& jobj,
scoped_refptr<cc::slim::Layer> layer);
SceneLayer(const SceneLayer&) = delete;
SceneLayer& operator=(const SceneLayer&) = delete;
virtual ~SceneLayer();
// Notifies that this scene layer is about to be detached from its parent.
// TODO(changwan): check if we can remove this.
virtual void OnDetach();
// Remove this SceneLayer from its current parent.
virtual void RemoveFromParent(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj);
// Java SceneLayer can use this method to destroy its native-side counterpart.
virtual void Destroy(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj);
// Returns cc::slim::Layer object that this SceneLayer contains.
scoped_refptr<cc::slim::Layer> layer() { return layer_; }
// Returns whether we should show background when we draw this SceneLayer.
virtual bool ShouldShowBackground();
// Returns the background color if it is needed.
virtual SkColor GetBackgroundColor();
protected:
JavaObjectWeakGlobalRef weak_java_scene_layer_;
scoped_refptr<cc::slim::Layer> layer_;
};
} // namespace android
#endif // CHROME_BROWSER_UI_ANDROID_LAYOUTS_SCENE_LAYER_H_
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