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// Copyright (c) 2010 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 class implements a simplified and much stripped down version of
// Chrome's app/resource_bundle machinery. It notably avoids unwanted
// dependencies on things like Skia.
//
#ifndef CHROME_FRAME_SIMPLE_RESOURCE_LOADER_H_
#define CHROME_FRAME_SIMPLE_RESOURCE_LOADER_H_
#include <windows.h>
#include <string>
#include <vector>
#include "base/file_path.h"
#include "base/gtest_prod_util.h"
#include "base/singleton.h"
class SimpleResourceLoader {
public:
static SimpleResourceLoader* instance() {
return Singleton<SimpleResourceLoader>::get();
}
// Returns the language tag for the active language.
static std::wstring GetLanguage();
// Helper method to return the string resource identified by message_id
// from the currently loaded locale dll.
static std::wstring Get(int message_id);
// Retrieves the HINSTANCE of the loaded module handle. May be NULL if a
// resource DLL could not be loaded.
HMODULE GetResourceModuleHandle();
// Retrieves the preferred languages for the current thread, adding them to
// |language_tags|.
static void GetPreferredLanguages(std::vector<std::wstring>* language_tags);
// Retrieves the thread/process/user/system preferred languages on Vista+,
// adding them and their fallbacks to |language_tags|. Returns |false| if the
// platform does not support such (i.e., XP).
static bool GetThreadPreferredUILanguages(
std::vector<std::wstring>* language_tags);
// Retrieves the system language and the region using ICU (used on XP).
static void GetICUSystemLanguage(std::wstring* language,
std::wstring* region);
// Populates |locales_path| with the path to the "Locales" directory.
static void DetermineLocalesDirectory(FilePath* locales_path);
// Returns false if |language_tag| is malformed.
static bool IsValidLanguageTag(const std::wstring& language_tag);
private:
SimpleResourceLoader();
~SimpleResourceLoader();
// Finds the most-preferred resource DLL for the laguages in |language_tags|
// in |locales_path|.
//
// Returns true on success with a handle to the DLL that was loaded in
// |dll_handle| and its path in |file_path|.
static bool LoadLocaleDll(const std::vector<std::wstring>& language_tags,
const FilePath& locales_path,
HMODULE* dll_handle,
FilePath* file_path);
// Returns the string resource identified by message_id from the currently
// loaded locale dll.
std::wstring GetLocalizedResource(int message_id);
friend struct DefaultSingletonTraits<SimpleResourceLoader>;
FRIEND_TEST_ALL_PREFIXES(SimpleResourceLoaderTest, LoadLocaleDll);
std::wstring language_;
HINSTANCE locale_dll_handle_;
};
#endif // CHROME_FRAME_SIMPLE_RESOURCE_LOADER_H_
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