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// Copyright (c) 2011 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_JAVA_BRIDGE_DISPATCHER_HOST_H_
#define CONTENT_BROWSER_RENDERER_JAVA_BRIDGE_DISPATCHER_HOST_H_
#pragma once
#include "base/memory/ref_counted.h"
#include "base/string16.h"
class JavaBridgeChannelHost;
class RenderViewHost;
struct NPObject;
// This class handles injecting Java objects into a single RenderView. The Java
// object itself lives on the browser's WEBKIT 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.
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 WEBKIT 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);
private:
friend class base::RefCountedThreadSafe<JavaBridgeDispatcherHost>;
~JavaBridgeDispatcherHost();
void DoAddNamedObject(const string16& name, NPObject* object);
void EnsureChannelIsSetUp();
RenderViewHost* render_view_host_;
scoped_refptr<JavaBridgeChannelHost> channel_;
DISALLOW_COPY_AND_ASSIGN(JavaBridgeDispatcherHost);
};
#endif // CONTENT_BROWSER_RENDERER_JAVA_BRIDGE_DISPATCHER_HOST_H_
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