/****************************************************************************
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** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
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** file. Please review the following information to ensure the GNU General
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****************************************************************************/

#include "qfont.h"
#include "qfont_p.h"
#include <private/qt_s60_p.h>
#include <private/qpixmap_s60_p.h>
#include "qmutex.h"

QT_BEGIN_NAMESPACE

#ifdef QT_NO_FREETYPE
Q_GLOBAL_STATIC(QMutex, lastResortFamilyMutex);
#endif // QT_NO_FREETYPE

extern QStringList qt_symbian_fontFamiliesOnFontServer(); // qfontdatabase_s60.cpp
Q_GLOBAL_STATIC_WITH_INITIALIZER(QStringList, fontFamiliesOnFontServer, {
    // We are only interested in the initial font families. No Application fonts.
    // Therefore, we are allowed to cache the list.
    x->append(qt_symbian_fontFamiliesOnFontServer());
});

QString QFont::lastResortFont() const
{
    // Symbian's font Api does not distinguish between font and family.
    // Therefore we try to get a "Family" first, then fall back to "Sans".
    static QString font = lastResortFamily();
    if (font.isEmpty())
        font = QLatin1String("Sans");
    return font;
}

QString QFont::lastResortFamily() const
{
#ifdef QT_NO_FREETYPE
    QMutexLocker locker(lastResortFamilyMutex());
    static QString family;
    if (family.isEmpty()) {
        
        QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
        
        CFont *font;
        const TInt err = S60->screenDevice()->GetNearestFontInTwips(font, TFontSpec());
        Q_ASSERT(err == KErrNone);
        const TFontSpec spec = font->FontSpecInTwips();
        family = QString((const QChar *)spec.iTypeface.iName.Ptr(), spec.iTypeface.iName.Length());
        S60->screenDevice()->ReleaseFont(font);
        
        lock.relock();
    }
    return family;
#else // QT_NO_FREETYPE
    // For the FreeType case we just hard code the face name, since otherwise on
    // East Asian systems we may get a name for a stroke based (non-ttf) font.

    // TODO: Get the type face name in a proper way

    const bool isJapaneseOrChineseSystem =
        User::Language() == ELangJapanese || User::Language() == ELangPrcChinese;

    static QString family;
    if (family.isEmpty()) {
        QStringList families = qt_symbian_fontFamiliesOnFontServer();
        const char* const preferredFamilies[] = {"Nokia Sans S60", "Series 60 Sans"};
        for (int i = 0; i < sizeof preferredFamilies / sizeof preferredFamilies[0]; ++i) {
            const QString preferredFamily = QLatin1String(preferredFamilies[i]);
            if (families.contains(preferredFamily)) {
                family = preferredFamily;
                break;
            }
        }
    }

    return QLatin1String(isJapaneseOrChineseSystem?"Heisei Kaku Gothic S60":family.toLatin1());
#endif // QT_NO_FREETYPE
}

QString QFont::defaultFamily() const
{
#ifdef QT_NO_FREETYPE
    switch(d->request.styleHint) {
        case QFont::SansSerif: {
            static const char* const preferredSansSerif[] = {"Nokia Sans S60", "Series 60 Sans"};
            for (int i = 0; i < sizeof preferredSansSerif / sizeof preferredSansSerif[0]; ++i) {
                const QString sansSerif = QLatin1String(preferredSansSerif[i]);
                if (fontFamiliesOnFontServer()->contains(sansSerif))
                    return sansSerif;
            }
        }
        // No break. Intentional fall through.
        default:
            return lastResortFamily();
    }
#endif // QT_NO_FREETYPE
    return lastResortFamily();
}

QT_END_NAMESPACE