content/renderer/pepper/npobject_var.cc

   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 #include "content/renderer/pepper/npobject_var.h"
   6
   7 #include "base/logging.h"
   8 #include "content/renderer/pepper/host_globals.h"
   9 #include "content/renderer/pepper/host_var_tracker.h"
  10 #include "ppapi/c/pp_var.h"
  11 #include "third_party/WebKit/public/web/WebBindings.h"
  12
  13 using blink::WebBindings;
  14
  15 namespace ppapi {
  16
  17 // NPObjectVar -----------------------------------------------------------------
  18
  19 NPObjectVar::NPObjectVar(PP_Instance instance, NPObject* np_object)
  20     : pp_instance_(instance), np_object_(np_object) {
  21   WebBindings::retainObject(np_object_);
  22   content::HostGlobals::Get()->host_var_tracker()->AddNPObjectVar(this);
  23 }
  24
  25 NPObjectVar::~NPObjectVar() {
  26   if (pp_instance())
  27     content::HostGlobals::Get()->host_var_tracker()->RemoveNPObjectVar(this);
  28   WebBindings::releaseObject(np_object_);
  29 }
  30
  31 NPObjectVar* NPObjectVar::AsNPObjectVar() { return this; }
  32
  33 PP_VarType NPObjectVar::GetType() const { return PP_VARTYPE_OBJECT; }
  34
  35 void NPObjectVar::InstanceDeleted() {
  36   DCHECK(pp_instance_);
  37   content::HostGlobals::Get()->host_var_tracker()->RemoveNPObjectVar(this);
  38   pp_instance_ = 0;
  39 }
  40
  41 // static
  42 scoped_refptr<NPObjectVar> NPObjectVar::FromPPVar(PP_Var var) {
  43   if (var.type != PP_VARTYPE_OBJECT)
  44     return scoped_refptr<NPObjectVar>(NULL);
  45   scoped_refptr<Var> var_object(
  46       PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
  47   if (!var_object.get())
  48     return scoped_refptr<NPObjectVar>();
  49   return scoped_refptr<NPObjectVar>(var_object->AsNPObjectVar());
  50 }
  51
  52 }  // namespace ppapi