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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.
#ifndef CHROME_INSTALLER_UTIL_SET_REG_VALUE_WORK_ITEM_H__
#define CHROME_INSTALLER_UTIL_SET_REG_VALUE_WORK_ITEM_H__
#include <windows.h>
#include <string>
#include <vector>
#include "base/callback.h"
#include "chrome/installer/util/work_item.h"
// A WorkItem subclass that sets a registry value with REG_SZ, REG_DWORD, or
// REG_QWORD type at the specified path. The value is only set if the target key
// exists.
class SetRegValueWorkItem : public WorkItem {
public:
SetRegValueWorkItem(HKEY predefined_root,
const std::wstring& key_path,
REGSAM wow64_access,
const std::wstring& value_name,
const std::wstring& value_data,
bool overwrite);
SetRegValueWorkItem(HKEY predefined_root,
const std::wstring& key_path,
REGSAM wow64_access,
const std::wstring& value_name,
DWORD value_data,
bool overwrite);
SetRegValueWorkItem(HKEY predefined_root,
const std::wstring& key_path,
REGSAM wow64_access,
const std::wstring& value_name,
int64 value_data,
bool overwrite);
// Implies |overwrite_| and TYPE_SZ for now.
SetRegValueWorkItem(HKEY predefined_root,
const std::wstring& key_path,
REGSAM wow64_access,
const std::wstring& value_name,
const GetValueFromExistingCallback& get_value_callback);
~SetRegValueWorkItem() override;
bool Do() override;
void Rollback() override;
private:
enum SettingStatus {
// The status before Do is called.
SET_VALUE,
// One possible outcome after Do(). A new value is created under the key.
NEW_VALUE_CREATED,
// One possible outcome after Do(). The previous value under the key has
// been overwritten.
VALUE_OVERWRITTEN,
// One possible outcome after Do(). No change is applied, either
// because we are not allowed to overwrite the previous value, or due to
// some errors like the key does not exist.
VALUE_UNCHANGED,
// The status after Do and Rollback is called.
VALUE_ROLL_BACK
};
// Root key of the target key under which the value is set. The root key can
// only be one of the predefined keys on Windows.
HKEY predefined_root_;
// Path of the target key under which the value is set.
std::wstring key_path_;
// Name of the value to be set.
std::wstring value_name_;
// If this is set, it will be used to get the desired value to be set based on
// the existing value in the registry.
const GetValueFromExistingCallback get_value_callback_;
// Whether to overwrite the existing value under the target key.
bool overwrite_;
// Whether to force 32-bit or 64-bit view of the target key.
REGSAM wow64_access_;
// Type of data to store
DWORD type_;
std::vector<uint8> value_;
DWORD previous_type_;
std::vector<uint8> previous_value_;
SettingStatus status_;
};
#endif // CHROME_INSTALLER_UTIL_SET_REG_VALUE_WORK_ITEM_H__
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