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// 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/host_var_serialization_rules.h"
#include "base/logging.h"
#include "ppapi/c/ppb_var.h"
namespace pp {
namespace proxy {
HostVarSerializationRules::HostVarSerializationRules(
const PPB_Var* var_interface,
PP_Module pp_module)
: var_interface_(var_interface),
pp_module_(pp_module) {
}
HostVarSerializationRules::~HostVarSerializationRules() {
}
PP_Var HostVarSerializationRules::SendCallerOwned(const PP_Var& var,
std::string* str_val) {
if (var.type == PP_VARTYPE_STRING)
VarToString(var, str_val);
return var;
}
PP_Var HostVarSerializationRules::BeginReceiveCallerOwned(
const PP_Var& var,
const std::string* str_val,
Dispatcher* /* dispatcher */) {
if (var.type == PP_VARTYPE_STRING) {
// Convert the string to the context of the current process.
return var_interface_->VarFromUtf8(pp_module_, str_val->c_str(),
static_cast<uint32_t>(str_val->size()));
}
return var;
}
void HostVarSerializationRules::EndReceiveCallerOwned(const PP_Var& var) {
if (var.type == PP_VARTYPE_STRING) {
// Destroy the string BeginReceiveCallerOwned created above.
var_interface_->Release(var);
}
}
PP_Var HostVarSerializationRules::ReceivePassRef(const PP_Var& var,
const std::string& str_val,
Dispatcher* /* dispatcher */) {
if (var.type == PP_VARTYPE_STRING) {
// Convert the string to the context of the current process.
return var_interface_->VarFromUtf8(pp_module_, str_val.c_str(),
static_cast<uint32_t>(str_val.size()));
}
// See PluginVarSerialization::BeginSendPassRef for an example.
if (var.type == PP_VARTYPE_OBJECT)
var_interface_->AddRef(var);
return var;
}
PP_Var HostVarSerializationRules::BeginSendPassRef(const PP_Var& var,
std::string* str_val) {
// See PluginVarSerialization::ReceivePassRef for an example. We don't need
// to do anything here other than convert the string.
if (var.type == PP_VARTYPE_STRING)
VarToString(var, str_val);
return var;
}
void HostVarSerializationRules::EndSendPassRef(const PP_Var& /* var */,
Dispatcher* /* dispatcher */) {
// See PluginVarSerialization::ReceivePassRef for an example. We don't need
// to do anything here.
}
void HostVarSerializationRules::VarToString(const PP_Var& var,
std::string* str) {
DCHECK(var.type == PP_VARTYPE_STRING);
// This could be optimized to avoid an extra string copy by going to a lower
// level of the browser's implementation of strings where we already have
// a std::string.
uint32_t len = 0;
const char* data = var_interface_->VarToUtf8(var, &len);
str->assign(data, len);
}
void HostVarSerializationRules::ReleaseObjectRef(const PP_Var& var) {
var_interface_->Release(var);
}
} // namespace proxy
} // namespace pp
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