src/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 WebKit::WebBindings;
  14
  15 namespace ppapi {
  16
  17 // NPObjectVar -----------------------------------------------------------------
  18
  19 NPObjectVar::NPObjectVar(PP_Instance instance,
  20                          NPObject* np_object)
  21     : pp_instance_(instance),
  22       np_object_(np_object) {
  23   WebBindings::retainObject(np_object_);
  24   content::HostGlobals::Get()->host_var_tracker()->AddNPObjectVar(this);
  25 }
  26
  27 NPObjectVar::~NPObjectVar() {
  28   if (pp_instance())
  29     content::HostGlobals::Get()->host_var_tracker()->RemoveNPObjectVar(this);
  30   WebBindings::releaseObject(np_object_);
  31 }
  32
  33 NPObjectVar* NPObjectVar::AsNPObjectVar() {
  34   return this;
  35 }
  36
  37 PP_VarType NPObjectVar::GetType() const {
  38   return PP_VARTYPE_OBJECT;
  39 }
  40
  41 void NPObjectVar::InstanceDeleted() {
  42   DCHECK(pp_instance_);
  43   content::HostGlobals::Get()->host_var_tracker()->RemoveNPObjectVar(this);
  44   pp_instance_ = 0;
  45 }
  46
  47 // static
  48 scoped_refptr<NPObjectVar> NPObjectVar::FromPPVar(PP_Var var) {
  49   if (var.type != PP_VARTYPE_OBJECT)
  50     return scoped_refptr<NPObjectVar>(NULL);
  51   scoped_refptr<Var> var_object(
  52       PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
  53   if (!var_object.get())
  54     return scoped_refptr<NPObjectVar>();
  55   return scoped_refptr<NPObjectVar>(var_object->AsNPObjectVar());
  56 }
  57
  58 }  // namespace ppapi