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// Copyright (c) 2012 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/serialized_flash_menu.h"
#include <stdint.h>
#include "ipc/ipc_message.h"
#include "ppapi/c/private/ppb_flash_menu.h"
#include "ppapi/proxy/ppapi_param_traits.h"
namespace ppapi {
namespace proxy {
namespace {
// Maximum depth of submenus allowed (e.g., 1 indicates that submenus are
// allowed, but not sub-submenus).
const int kMaxMenuDepth = 2;
const uint32_t kMaxMenuEntries = 1000;
bool CheckMenu(int depth, const PP_Flash_Menu* menu);
void FreeMenu(const PP_Flash_Menu* menu);
void WriteMenu(base::Pickle* m, const PP_Flash_Menu* menu);
PP_Flash_Menu* ReadMenu(int depth,
const base::Pickle* m,
base::PickleIterator* iter);
bool CheckMenuItem(int depth, const PP_Flash_MenuItem* item) {
if (item->type == PP_FLASH_MENUITEM_TYPE_SUBMENU)
return CheckMenu(depth, item->submenu);
return true;
}
bool CheckMenu(int depth, const PP_Flash_Menu* menu) {
if (depth > kMaxMenuDepth || !menu)
return false;
++depth;
if (menu->count && !menu->items)
return false;
for (uint32_t i = 0; i < menu->count; ++i) {
if (!CheckMenuItem(depth, menu->items + i))
return false;
}
return true;
}
void WriteMenuItem(base::Pickle* m, const PP_Flash_MenuItem* menu_item) {
PP_Flash_MenuItem_Type type = menu_item->type;
m->WriteUInt32(type);
m->WriteString(menu_item->name ? menu_item->name : "");
m->WriteInt(menu_item->id);
IPC::WriteParam(m, menu_item->enabled);
IPC::WriteParam(m, menu_item->checked);
if (type == PP_FLASH_MENUITEM_TYPE_SUBMENU)
WriteMenu(m, menu_item->submenu);
}
void WriteMenu(base::Pickle* m, const PP_Flash_Menu* menu) {
m->WriteUInt32(menu->count);
for (uint32_t i = 0; i < menu->count; ++i)
WriteMenuItem(m, menu->items + i);
}
void FreeMenuItem(const PP_Flash_MenuItem* menu_item) {
if (menu_item->name)
delete [] menu_item->name;
if (menu_item->submenu)
FreeMenu(menu_item->submenu);
}
void FreeMenu(const PP_Flash_Menu* menu) {
if (menu->items) {
for (uint32_t i = 0; i < menu->count; ++i)
FreeMenuItem(menu->items + i);
delete [] menu->items;
}
delete menu;
}
bool ReadMenuItem(int depth,
const base::Pickle* m,
base::PickleIterator* iter,
PP_Flash_MenuItem* menu_item) {
uint32_t type;
if (!iter->ReadUInt32(&type))
return false;
if (type > PP_FLASH_MENUITEM_TYPE_SUBMENU)
return false;
menu_item->type = static_cast<PP_Flash_MenuItem_Type>(type);
std::string name;
if (!iter->ReadString(&name))
return false;
menu_item->name = new char[name.size() + 1];
std::copy(name.begin(), name.end(), menu_item->name);
menu_item->name[name.size()] = 0;
if (!iter->ReadInt(&menu_item->id))
return false;
if (!IPC::ReadParam(m, iter, &menu_item->enabled))
return false;
if (!IPC::ReadParam(m, iter, &menu_item->checked))
return false;
if (type == PP_FLASH_MENUITEM_TYPE_SUBMENU) {
menu_item->submenu = ReadMenu(depth, m, iter);
if (!menu_item->submenu)
return false;
}
return true;
}
PP_Flash_Menu* ReadMenu(int depth,
const base::Pickle* m,
base::PickleIterator* iter) {
if (depth > kMaxMenuDepth)
return NULL;
++depth;
PP_Flash_Menu* menu = new PP_Flash_Menu;
menu->items = NULL;
if (!iter->ReadUInt32(&menu->count)) {
FreeMenu(menu);
return NULL;
}
if (menu->count == 0)
return menu;
if (menu->count > kMaxMenuEntries) {
FreeMenu(menu);
return NULL;
}
menu->items = new PP_Flash_MenuItem[menu->count];
memset(menu->items, 0, sizeof(PP_Flash_MenuItem) * menu->count);
for (uint32_t i = 0; i < menu->count; ++i) {
if (!ReadMenuItem(depth, m, iter, menu->items + i)) {
FreeMenu(menu);
return NULL;
}
}
return menu;
}
} // anonymous namespace
SerializedFlashMenu::SerializedFlashMenu()
: pp_menu_(NULL),
own_menu_(false) {
}
SerializedFlashMenu::~SerializedFlashMenu() {
if (own_menu_)
FreeMenu(pp_menu_);
}
bool SerializedFlashMenu::SetPPMenu(const PP_Flash_Menu* menu) {
DCHECK(!pp_menu_);
if (!CheckMenu(0, menu))
return false;
pp_menu_ = menu;
own_menu_ = false;
return true;
}
void SerializedFlashMenu::WriteToMessage(base::Pickle* m) const {
WriteMenu(m, pp_menu_);
}
bool SerializedFlashMenu::ReadFromMessage(const base::Pickle* m,
base::PickleIterator* iter) {
DCHECK(!pp_menu_);
pp_menu_ = ReadMenu(0, m, iter);
if (!pp_menu_)
return false;
own_menu_ = true;
return true;
}
} // namespace proxy
} // namespace ppapi
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