/*

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#include "config.h"

#include "TextBreakIteratorInternalICU.h"

namespace WebCore {

static const int maxLocaleStringLength = 32;

// This code was swiped from the CarbonCore UnicodeUtilities. One change from that is to use the empty

// string instead of the "old locale model" as the ultimate fallback. This change is per the UnicodeUtilities

// engineer.

static void getTextBreakLocale(char localeStringBuffer[maxLocaleStringLength])

{

    // Empty string means "root locale", which is what we use if we can't use a pref.

    // We get the parts string from AppleTextBreakLocale pref.

    // If that fails then look for the first language in the AppleLanguages pref.

    CFStringRef prefLocaleStr = (CFStringRef)CFPreferencesCopyValue(CFSTR("AppleTextBreakLocale"),

        kCFPreferencesAnyApplication, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);

    if (!prefLocaleStr) {

        CFArrayRef appleLangArr = (CFArrayRef)CFPreferencesCopyValue(CFSTR("AppleLanguages"),

            kCFPreferencesAnyApplication, kCFPreferencesCurrentUser, kCFPreferencesAnyHost);

        if (appleLangArr)  {

            // Take the topmost language. Retain so that we can blindly release later.                                                                                                   

            prefLocaleStr = (CFStringRef)CFArrayGetValueAtIndex(appleLangArr, 0);

            if (prefLocaleStr)

                CFRetain(prefLocaleStr); 

            CFRelease(appleLangArr);

        }

    }

    if (prefLocaleStr) {

        // Canonicalize pref string in case it is not in the canonical format.

        CFStringRef canonLocaleCFStr = CFLocaleCreateCanonicalLanguageIdentifierFromString(kCFAllocatorDefault, prefLocaleStr);

        if (canonLocaleCFStr) {

            CFStringGetCString(canonLocaleCFStr, localeStringBuffer, maxLocaleStringLength, kCFStringEncodingASCII);

            CFRelease(canonLocaleCFStr);

        }

        CFRelease(prefLocaleStr);

    }

}

const char* currentTextBreakLocaleID()

{

    static char localeStringBuffer[maxLocaleStringLength];

    static bool gotTextBreakLocale = false;

    if (!gotTextBreakLocale) {

        getTextBreakLocale(localeStringBuffer);

        gotTextBreakLocale = true;

    }

    return localeStringBuffer;

}

}