Source/WebCore/platform/text/LocaleToScriptMappingICU.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "config.h"
#include "LocaleToScriptMapping.h"

#include <unicode/uloc.h>
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

// Treat certain families of script codes as a single script for assigning a per-script font in Settings.
static UScriptCode scriptCodeForFontSelection(UScriptCode scriptCode)
{
    switch (scriptCode) {
    case USCRIPT_HIRAGANA:
    case USCRIPT_KATAKANA:
    case USCRIPT_JAPANESE:
        return USCRIPT_KATAKANA_OR_HIRAGANA;
    case USCRIPT_KOREAN:
        return USCRIPT_HANGUL;
    default:
        return scriptCode;
    }
}

UScriptCode localeToScriptCodeForFontSelection(const String& locale)
{
    if (locale.isEmpty())
        return USCRIPT_COMMON;

    char maximizedLocale[ULOC_FULLNAME_CAPACITY];
    UErrorCode status = U_ZERO_ERROR;
    uloc_addLikelySubtags(locale.utf8().data(), maximizedLocale, sizeof(maximizedLocale), &status);
    if (U_FAILURE(status))
        return USCRIPT_COMMON;

    char script[ULOC_SCRIPT_CAPACITY];
    uloc_getScript(maximizedLocale, script, sizeof(script), &status);
    if (U_FAILURE(status))
        return USCRIPT_COMMON;

    UScriptCode scriptCode = USCRIPT_COMMON;
    uscript_getCode(script, &scriptCode, 1, &status);
    // Ignore error that multiple scripts could be returned, since we only want one script.
    if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
        return USCRIPT_COMMON;

    return scriptCodeForFontSelection(scriptCode);
}

UScriptCode scriptNameToCode(const String& name)
{
    int32_t code = u_getPropertyValueEnum(UCHAR_SCRIPT, name.utf8().data());
    if (code >= 0 && code < USCRIPT_CODE_LIMIT)
        return static_cast<UScriptCode>(code);
    return USCRIPT_INVALID_CODE;
}

} // namespace WebCore