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.
5 #ifndef CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_H_
6 #define CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_H_
9 #include "base/memory/ref_counted.h"
10 #include "base/memory/weak_ptr.h"
11 #include "base/strings/string16.h"
12 #include "content/child/npapi/npobject_stub.h"
14 class RouteIDGenerator;
23 class RenderFrameHost;
24 struct NPVariant_Param;
26 // This class handles injecting Java objects into a single RenderFrame. The Java
27 // object itself lives in the browser process on a background thread, while a
28 // proxy object is created in the renderer. An instance of this class exists
29 // for each RenderViewHost.
30 class JavaBridgeDispatcherHost
31 : public base::RefCountedThreadSafe<JavaBridgeDispatcherHost> {
33 // We hold a weak pointer to the RenderFrameHost. It must outlive this object.
34 explicit JavaBridgeDispatcherHost(RenderFrameHost* render_frame_host);
36 // Injects |object| into the main frame of the corresponding RenderView. A
37 // proxy object is created in the renderer and when the main frame's window
38 // object is next cleared, this proxy object is bound to the window object
39 // using |name|. The proxy object remains bound until the next time the
40 // window object is cleared after a call to RemoveNamedObject() or
41 // AddNamedObject() with the same name. The proxy object proxies calls back
42 // to |object|, which is manipulated on the background thread. This class
43 // holds a reference to |object| for the time that the proxy object is bound
44 // to the window object.
45 void AddNamedObject(const base::string16& name, NPObject* object);
46 void RemoveNamedObject(const base::string16& name);
48 // Since this object is ref-counted, it might outlive render_frame_host.
49 void RenderFrameDeleted();
51 void OnGetChannelHandle(IPC::Message* reply_msg);
52 void Send(IPC::Message* msg);
55 friend class base::RefCountedThreadSafe<JavaBridgeDispatcherHost>;
56 virtual ~JavaBridgeDispatcherHost();
58 void GetChannelHandle(IPC::Message* reply_msg);
59 void CreateNPVariantParam(NPObject* object, NPVariant_Param* param);
60 void CreateObjectStub(NPObject* object, int render_process_id, int route_id);
62 scoped_refptr<NPChannelBase> channel_;
63 RenderFrameHost* render_frame_host_;
64 std::vector<base::WeakPtr<NPObjectStub> > stubs_;
66 DISALLOW_COPY_AND_ASSIGN(JavaBridgeDispatcherHost);
69 } // namespace content
71 #endif // CONTENT_BROWSER_RENDERER_HOST_JAVA_JAVA_BRIDGE_DISPATCHER_HOST_H_