// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ppapi/proxy/ppb_var_proxy.h"

#include "ppapi/c/pp_var.h"
#include "ppapi/c/ppb_var.h"
#include "ppapi/proxy/plugin_resource_tracker.h"
#include "ppapi/proxy/plugin_var_tracker.h"
#include "ppapi/shared_impl/var.h"

namespace ppapi {
namespace proxy {

namespace {

// PPP_Var plugin --------------------------------------------------------------

void AddRefVar(PP_Var var) {
  PluginResourceTracker::GetInstance()->var_tracker().AddRefVar(var);
}

void ReleaseVar(PP_Var var) {
  PluginResourceTracker::GetInstance()->var_tracker().ReleaseVar(var);
}

PP_Var VarFromUtf8(PP_Module module, const char* data, uint32_t len) {
  return StringVar::StringToPPVar(module, data, len);
}

const char* VarToUtf8(PP_Var var, uint32_t* len) {
  StringVar* str = StringVar::FromPPVar(var);
  if (str) {
    *len = static_cast<uint32_t>(str->value().size());
    return str->value().c_str();
  }
  *len = 0;
  return NULL;
}

const PPB_Var var_interface = {
  &AddRefVar,
  &ReleaseVar,
  &VarFromUtf8,
  &VarToUtf8
};

InterfaceProxy* CreateVarProxy(Dispatcher* dispatcher,
                               const void* target_interface) {
  return new PPB_Var_Proxy(dispatcher, target_interface);
}

}  // namespace

PPB_Var_Proxy::PPB_Var_Proxy(Dispatcher* dispatcher,
                             const void* target_interface)
    : InterfaceProxy(dispatcher, target_interface) {
}

PPB_Var_Proxy::~PPB_Var_Proxy() {
}

// static
const InterfaceProxy::Info* PPB_Var_Proxy::GetInfo() {
  static const Info info = {
    &var_interface,
    PPB_VAR_INTERFACE,
    INTERFACE_ID_PPB_VAR,
    false,
    &CreateVarProxy,
  };
  return &info;
}

bool PPB_Var_Proxy::OnMessageReceived(const IPC::Message& msg) {
  // All PPB_Var calls are handled locally; there is no need to send or receive
  // messages here.
  return false;
}

}  // namespace proxy
}  // namespace ppapi