ppapi/proxy/proxy_object_var.h

   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 PPAPI_PROXY_PROXY_OBJECT_VAR_H_
   6 #define PPAPI_PROXY_PROXY_OBJECT_VAR_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "ppapi/proxy/ppapi_proxy_export.h"
  10 #include "ppapi/shared_impl/var.h"
  11
  12 namespace ppapi {
  13
  14 namespace proxy {
  15 class PluginDispatcher;
  16 }  // namespace proxy
  17
  18 // Tracks a reference to an object var in the plugin side of the proxy. This
  19 // just stores the dispatcher and host var ID, and provides the interface for
  20 // integrating this with PP_Var creation.
  21 class PPAPI_PROXY_EXPORT ProxyObjectVar : public Var {
  22  public:
  23   ProxyObjectVar(proxy::PluginDispatcher* dispatcher,
  24                  int32 host_var_id);
  25
  26   virtual ~ProxyObjectVar();
  27
  28   // Var overrides.
  29   virtual ProxyObjectVar* AsProxyObjectVar() OVERRIDE;
  30   virtual PP_VarType GetType() const OVERRIDE;
  31
  32   proxy::PluginDispatcher* dispatcher() const { return dispatcher_; }
  33   int32 host_var_id() const { return host_var_id_; }
  34
  35   void* user_data() const { return user_data_; }
  36   void set_user_data(void* ud) { user_data_ = ud; }
  37
  38   // Expose AssignVarID on Var so the PluginResourceTracker can call us when
  39   // it's creating IDs.
  40   void AssignVarID(int32 id);
  41
  42   void clear_dispatcher() { dispatcher_ = NULL; }
  43
  44  private:
  45   proxy::PluginDispatcher* dispatcher_;
  46   int32 host_var_id_;
  47
  48   // When this object is created as representing a var implemented by the
  49   // plugin, this stores the user data so that we can look it up later. See
  50   // PluginVarTracker.
  51   void* user_data_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(ProxyObjectVar);
  54 };
  55
  56 }  // namespace ppapi
  57
  58 #endif  // PPAPI_PROXY_PROXY_OBJECT_VAR_H_