1 // Copyright 2013 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 PPAPI_SHARED_IMPL_RESOURCE_VAR_H_ 6 #define PPAPI_SHARED_IMPL_RESOURCE_VAR_H_ 7 8 #include "ppapi/c/pp_resource.h" 9 #include "ppapi/c/pp_var.h" 10 #include "ppapi/shared_impl/ppapi_shared_export.h" 11 #include "ppapi/shared_impl/var.h" 12 13 namespace IPC { 14 class Message; 15 } 16 17 namespace ppapi { 18 19 // Represents a resource Var. 20 class PPAPI_SHARED_EXPORT ResourceVar : public Var { 21 public: 22 // Gets the resource ID associated with this var. 23 // This is 0 if a resource is still pending (only possible on the host side). 24 // NOTE: This can return a PP_Resource with a reference count of 0 on the 25 // plugin side. It should be AddRef'd if the resource is passed to the user. 26 virtual PP_Resource GetPPResource() const = 0; 27 28 // Gets the pending resource host ID in the renderer. 29 virtual int GetPendingRendererHostId() const; 30 31 // Gets the pending resource host ID in the browser. 32 virtual int GetPendingBrowserHostId() const; 33 34 // Gets the message for creating a plugin-side resource. Returns NULL if the 35 // message is empty (which is always true on the plugin side). 36 virtual const IPC::Message* GetCreationMessage() const; 37 38 // Determines whether this is a pending resource. 39 // This is true if, on the host side, the there is a creation_message and no 40 // PP_Resource. 41 virtual bool IsPending() const = 0; 42 43 // Var override. 44 virtual ResourceVar* AsResourceVar() OVERRIDE; 45 virtual PP_VarType GetType() const OVERRIDE; 46 47 // Helper function that converts a PP_Var to a ResourceVar. This will 48 // return NULL if the PP_Var is not of Resource type. 49 static ResourceVar* FromPPVar(PP_Var var); 50 51 protected: 52 ResourceVar(); 53 54 virtual ~ResourceVar(); 55 56 private: 57 DISALLOW_COPY_AND_ASSIGN(ResourceVar); 58 }; 59 60 } // namespace ppapi 61 62 #endif // PPAPI_SHARED_IMPL_RESOURCE_VAR_H_ 63
