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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_H_
#define CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_H_
#include <vector>
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string16.h"
#include "content/child/npapi/npobject_stub.h"
class RouteIDGenerator;
struct NPObject;
namespace IPC {
class Message;
}
namespace content {
class NPChannelBase;
class RenderViewHost;
struct NPVariant_Param;
// This class handles injecting Java objects into a single RenderView. The Java
// object itself lives in the browser process on a background thread, while a
// proxy object is created in the renderer. An instance of this class exists
// for each RenderViewHost.
class JavaBridgeDispatcherHost
: public base::RefCountedThreadSafe<JavaBridgeDispatcherHost> {
public:
// We hold a weak pointer to the RenderViewhost. It must outlive this object.
explicit JavaBridgeDispatcherHost(RenderViewHost* render_view_host);
// Injects |object| into the main frame of the corresponding RenderView. A
// proxy object is created in the renderer and when the main frame's window
// object is next cleared, this proxy object is bound to the window object
// using |name|. The proxy object remains bound until the next time the
// window object is cleared after a call to RemoveNamedObject() or
// AddNamedObject() with the same name. The proxy object proxies calls back
// to |object|, which is manipulated on the background thread. This class
// holds a reference to |object| for the time that the proxy object is bound
// to the window object.
void AddNamedObject(const string16& name, NPObject* object);
void RemoveNamedObject(const string16& name);
// Since this object is ref-counted, it might outlive render_view_host_.
void RenderViewDeleted();
void OnGetChannelHandle(IPC::Message* reply_msg);
private:
friend class base::RefCountedThreadSafe<JavaBridgeDispatcherHost>;
virtual ~JavaBridgeDispatcherHost();
void Send(IPC::Message* msg);
void GetChannelHandle(IPC::Message* reply_msg);
void CreateNPVariantParam(NPObject* object, NPVariant_Param* param);
void CreateObjectStub(NPObject* object, int render_process_id, int route_id);
scoped_refptr<NPChannelBase> channel_;
RenderViewHost* render_view_host_;
std::vector<base::WeakPtr<NPObjectStub> > stubs_;
DISALLOW_COPY_AND_ASSIGN(JavaBridgeDispatcherHost);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_H_
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