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// Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_MANAGER_H_
#define CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_MANAGER_H_
#include <map>
#include "base/android/jni_helper.h"
#include "base/android/scoped_java_ref.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "content/public/browser/web_contents_observer.h"
struct NPObject;
namespace content {
class JavaBridgeDispatcherHost;
class RenderViewHost;
// This class handles injecting Java objects into all of the RenderViews
// associated with a WebContents. It manages a set of JavaBridgeDispatcherHost
// objects, one per RenderViewHost.
class JavaBridgeDispatcherHostManager
: public WebContentsObserver,
public base::SupportsWeakPtr<JavaBridgeDispatcherHostManager> {
public:
explicit JavaBridgeDispatcherHostManager(WebContents* web_contents);
virtual ~JavaBridgeDispatcherHostManager();
// These methods add or remove the object to each JavaBridgeDispatcherHost.
// Each one holds a reference to the NPObject while the object is bound to
// the corresponding RenderView. See JavaBridgeDispatcherHost for details.
void AddNamedObject(const string16& name, NPObject* object);
void RemoveNamedObject(const string16& name);
// Every time a JavaBoundObject backed by a real Java object is
// created/destroyed, we insert/remove a strong ref to that Java object into
// this set so that it doesn't get garbage collected while it's still
// potentially in use. Although the set is managed native side, it's owned
// and defined in Java so that pushing refs into it does not create new GC
// roots that would prevent ContentViewCore from being garbage collected.
void SetRetainedObjectSet(const JavaObjectWeakGlobalRef& retained_object_set);
// WebContentsObserver overrides
virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
virtual void RenderViewDeleted(RenderViewHost* render_view_host) OVERRIDE;
virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE;
virtual void DocumentAvailableInMainFrame() OVERRIDE;
void JavaBoundObjectCreated(const base::android::JavaRef<jobject>& object);
void JavaBoundObjectDestroyed(const base::android::JavaRef<jobject>& object);
private:
typedef std::map<RenderViewHost*, scoped_refptr<JavaBridgeDispatcherHost> >
InstanceMap;
InstanceMap instances_;
typedef std::map<string16, NPObject*> ObjectMap;
ObjectMap objects_;
JavaObjectWeakGlobalRef retained_object_set_;
DISALLOW_COPY_AND_ASSIGN(JavaBridgeDispatcherHostManager);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_MANAGER_H_
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