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1 // Copyright (c) 2011 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 WEBKIT_PLUGINS_PPAPI_RESOURCE_HELPER_H_ | |
6 #define WEBKIT_PLUGINS_PPAPI_RESOURCE_HELPER_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "ppapi/c/pp_instance.h" | |
10 #include "ppapi/c/pp_resource.h" | |
11 #include "webkit/plugins/webkit_plugins_export.h" | |
12 | |
13 namespace ppapi { | |
14 class Resource; | |
15 } | |
16 | |
17 namespace webkit { | |
18 namespace ppapi { | |
19 | |
20 class PluginInstanceImpl; | |
21 class PluginModule; | |
22 class PluginDelegate; | |
23 | |
24 // Helper functions for Resoruce implementations. | |
25 // | |
26 // This is specifically not designed to be a base class that derives from | |
27 // ppapi::Resource to avoid diamond inheritance if most of a resource class | |
28 // is implemented in the shared_impl (to share code with the proxy). | |
29 class ResourceHelper { | |
30 public: | |
31 // Returns the instance implementation object for the given resource, or NULL | |
32 // if the resource has outlived its instance. | |
33 static PluginInstanceImpl* GetPluginInstance( | |
34 const ::ppapi::Resource* resource); | |
35 | |
36 // Returns the module for the given resource, or NULL if the resource has | |
37 // outlived its instance. | |
38 WEBKIT_PLUGINS_EXPORT static PluginModule* GetPluginModule( | |
39 const ::ppapi::Resource* resource); | |
40 | |
41 // Returns the plugin delegate for the given resource, or NULL if the | |
42 // resource has outlived its instance. | |
43 static PluginDelegate* GetPluginDelegate(const ::ppapi::Resource* resource); | |
44 | |
45 // Returns the instance implementation object for the pp_instance. | |
46 static PluginInstanceImpl* PPInstanceToPluginInstance(PP_Instance instance); | |
47 | |
48 private: | |
49 DISALLOW_IMPLICIT_CONSTRUCTORS(ResourceHelper); | |
50 }; | |
51 | |
52 } // namespace ppapi | |
53 } // namespace webkit | |
54 | |
55 #endif // WEBKIT_PLUGINS_PPAPI_RESOURCE_IMPL_HELPER_H_ | |
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