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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.
// This file defines utility functions that can report details about the
// host operating environment.
#ifndef CHROME_APP_CLIENT_UTIL_H_
#define CHROME_APP_CLIENT_UTIL_H_
#pragma once
#include <windows.h>
#include <string>
namespace sandbox {
struct SandboxInterfaceInfo;
}
// Gets the path of the current exe with a trailing backslash.
std::wstring GetExecutablePath();
// Implements the common aspects of loading chrome.dll for both chrome and
// chromium scenarios, which are in charge of implementing two abstract
// methods: GetRegistryPath() and OnBeforeLaunch().
class MainDllLoader {
public:
MainDllLoader();
virtual ~MainDllLoader();
// Loads and calls the entry point of chrome.dll. |instance| is the exe
// instance retrieved from wWinMain and the |sbox_info| is the broker or
// target services interface pointer.
// The return value is what the main entry point of chrome.dll returns
// upon termination.
int Launch(HINSTANCE instance, sandbox::SandboxInterfaceInfo* sbox_info);
// Look into the registry to find the latest version.
std::wstring GetVersion();
// Launches a new instance of the browser if the current instance in
// persistent mode an upgrade is detected.
void RelaunchChromeBrowserWithNewCommandLineIfNeeded();
// Called after chrome.dll has been loaded but before the entry point
// is invoked. Derived classes can implement custom actions here.
// |dll_path| refers to the path of the Chrome dll being loaded.
virtual void OnBeforeLaunch(const std::wstring& dll_path) {}
// Called after the chrome.dll entry point returns and before terminating
// this process. The return value will be used as the process return code.
// |dll_path| refers to the path of the Chrome dll being loaded.
virtual int OnBeforeExit(int return_code, const std::wstring& dll_path) {
return return_code;
}
protected:
// Derived classes must return the relative registry path that holds the
// most current version of chrome.dll.
virtual std::wstring GetRegistryPath() = 0;
HMODULE Load(std::wstring* out_version, std::wstring* out_file);
private:
// Chrome.dll handle.
HMODULE dll_;
};
// Factory for the MainDllLoader. Caller owns the pointer and should call
// delete to free it.
MainDllLoader* MakeMainDllLoader();
#endif // CHROME_APP_CLIENT_UTIL_H_
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