1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_RENDERER_JAVA_JAVA_BRIDGE_DISPATCHER_H_
6#define CONTENT_RENDERER_JAVA_JAVA_BRIDGE_DISPATCHER_H_
7
8#include <map>
9
10#include "base/memory/ref_counted.h"
11#include "base/strings/string16.h"
12#include "content/public/renderer/render_frame_observer.h"
13#include "ipc/ipc_channel_handle.h"
14#include "third_party/npapi/bindings/npruntime.h"
15
16namespace content {
17class JavaBridgeChannel;
18struct NPVariant_Param;
19
20// This class handles injecting Java objects into the main frame of a
21// RenderView. The 'add' and 'remove' messages received from the browser
22// process modify the entries in a map of 'pending' objects. These objects are
23// bound to the window object of the main frame when that window object is next
24// cleared. These objects remain bound until the window object is cleared
25// again.
26class JavaBridgeDispatcher : public RenderFrameObserver {
27 public:
28  JavaBridgeDispatcher(RenderFrame* render_frame);
29  virtual ~JavaBridgeDispatcher();
30
31 private:
32  // RenderViewObserver override:
33  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
34  virtual void DidClearWindowObject() OVERRIDE;
35
36  // Message handlers
37  void OnAddNamedObject(const base::string16& name,
38                        const NPVariant_Param& variant_param);
39  void OnRemoveNamedObject(const base::string16& name);
40
41  void EnsureChannelIsSetUp();
42
43  // Objects that will be bound to the window when the window object is next
44  // cleared. We hold a ref to these.
45  typedef std::map<base::string16, NPVariant> ObjectMap;
46  ObjectMap objects_;
47  scoped_refptr<JavaBridgeChannel> channel_;
48};
49
50}  // namespace content
51
52#endif  // CONTENT_RENDERER_JAVA_JAVA_BRIDGE_DISPATCHER_H_
53