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      1 /*
      2  * Copyright (C) 2010 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 #include "config.h"
     27 #include "Language.h"
     28 
     29 #include "PlatformString.h"
     30 #include <wtf/HashMap.h>
     31 
     32 namespace WebCore {
     33 
     34 typedef HashMap<void*, LanguageChangeObserverFunction> ObserverMap;
     35 static ObserverMap& observerMap()
     36 {
     37     DEFINE_STATIC_LOCAL(ObserverMap, map, ());
     38     return map;
     39 }
     40 
     41 void addLanguageChangeObserver(void* context, LanguageChangeObserverFunction customObserver)
     42 {
     43     observerMap().set(context, customObserver);
     44 }
     45 
     46 void removeLanguageChangeObserver(void* context)
     47 {
     48     ASSERT(observerMap().contains(context));
     49     observerMap().remove(context);
     50 }
     51 
     52 void languageDidChange()
     53 {
     54     ObserverMap::iterator end = observerMap().end();
     55     for (ObserverMap::iterator iter = observerMap().begin(); iter != end; ++iter)
     56         iter->second(iter->first);
     57 }
     58 
     59 static String& languageOverride()
     60 {
     61     DEFINE_STATIC_LOCAL(String, override, ());
     62     return override;
     63 }
     64 
     65 String defaultLanguage()
     66 {
     67     const String& override = languageOverride();
     68     if (!override.isNull())
     69         return override;
     70 
     71     return platformDefaultLanguage();
     72 }
     73 
     74 void overrideDefaultLanguage(const String& override)
     75 {
     76     languageOverride() = override;
     77 }
     78 
     79 }
     80