1/*
2 * Copyright (C) 2003, 2006, 2010, 2013, 2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/Forward.h>
29#include <wtf/Vector.h>
30
31namespace WTF {
32
33WTF_EXPORT String defaultLanguage(); // Thread-safe.
34WTF_EXPORT Vector<String> userPreferredLanguages(); // Thread-safe, returns BCP 47 language tags.
35WTF_EXPORT Vector<String> userPreferredLanguagesOverride();
36WTF_EXPORT void overrideUserPreferredLanguages(const Vector<String>&);
37WTF_EXPORT size_t indexOfBestMatchingLanguageInList(const String& language, const Vector<String>& languageList, bool& exactMatch);
38WTF_EXPORT Vector<String> platformUserPreferredLanguages();
39// Called from platform specific code when the user's preferred language(s) change.
40void languageDidChange();
41
42// The observer function will be called when system language changes.
43typedef void (*LanguageChangeObserverFunction)(void* context);
44WTF_EXPORT void addLanguageChangeObserver(void* context, LanguageChangeObserverFunction);
45WTF_EXPORT void removeLanguageChangeObserver(void* context);
46
47WTF_EXPORT String displayNameForLanguageLocale(const String&);
48}
49
50using WTF::defaultLanguage;
51using WTF::userPreferredLanguages;
52using WTF::userPreferredLanguagesOverride;
53using WTF::overrideUserPreferredLanguages;
54using WTF::indexOfBestMatchingLanguageInList;
55using WTF::platformUserPreferredLanguages;
56using WTF::addLanguageChangeObserver;
57using WTF::removeLanguageChangeObserver;
58using WTF::displayNameForLanguageLocale;
59
60