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#include <private/qapplication_p.h>

#include "qdir.h"

#include "qfont_p.h"

#include "qfontengine_s60_p.h"

#include "qabstractfileengine.h"

#include "qdesktopservices.h"

#include "qendian.h"

#include <private/qcore_symbian_p.h>

#include <openfont.h>

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include <graphics/openfontrasterizer.h> // COpenFontRasterizer has moved to a new header file

#endif // SYMBIAN_ENABLE_SPLIT_HEADERS

QT_BEGIN_NAMESPACE

QFileInfoList alternativeFilePaths(const QString &path, const QStringList &nameFilters,

    QDir::Filters filters = QDir::NoFilter, QDir::SortFlags sort = QDir::NoSort,

    bool uniqueFileNames = true)

{

    QFileInfoList result;

    // Prepare a 'soft to hard' drive list: W:, X: ... A:, Z:

    QStringList driveStrings;

    foreach (const QFileInfo &drive, QDir::drives())

        driveStrings.append(drive.absolutePath());

    driveStrings.sort();

    const QString zDriveString(QLatin1String("Z:/"));

    driveStrings.removeAll(zDriveString);

    driveStrings.prepend(zDriveString);

    QStringList uniqueFileNameList;

    for (int i = driveStrings.count() - 1; i >= 0; --i) {

        const QDir dirOnDrive(driveStrings.at(i) + path);

        const QFileInfoList entriesOnDrive = dirOnDrive.entryInfoList(nameFilters, filters, sort);

        if (uniqueFileNames) {

            foreach(const QFileInfo &entry, entriesOnDrive) {

                if (!uniqueFileNameList.contains(entry.fileName())) {

                    uniqueFileNameList.append(entry.fileName());

                    result.append(entry);

                }

            }

        } else {

            result.append(entriesOnDrive);

        }

    }

    return result;

}

class QSymbianFontDatabaseExtrasImplementation : public QSymbianFontDatabaseExtras

{

public:

    QSymbianFontDatabaseExtrasImplementation();

    ~QSymbianFontDatabaseExtrasImplementation();

    const QSymbianTypeFaceExtras *extras(const QString &typeface, bool bold, bool italic) const;

private:

    RHeap* m_heap;

    CFontStore *m_store;

    COpenFontRasterizer *m_rasterizer;

    mutable QList<const QSymbianTypeFaceExtras *> m_extras;

    mutable QHash<QString, const QSymbianTypeFaceExtras *> m_extrasHash;

};

QSymbianFontDatabaseExtrasImplementation::QSymbianFontDatabaseExtrasImplementation()

{

    QStringList filters;

    filters.append(QLatin1String("*.ttf"));

    filters.append(QLatin1String("*.ccc"));

    const QFileInfoList fontFiles = alternativeFilePaths(QLatin1String("resource\\Fonts"), filters);

    const TInt heapMinLength = 0x1000;

    const TInt heapMaxLength = qMax(0x20000 * fontFiles.count(), heapMinLength);

    m_heap = User::ChunkHeap(NULL, heapMinLength, heapMaxLength);

    QT_TRAP_THROWING(

        m_store = CFontStore::NewL(m_heap);

        m_rasterizer = COpenFontRasterizer::NewL(TUid::Uid(0x101F7F5E));

        CleanupStack::PushL(m_rasterizer);

        m_store->InstallRasterizerL(m_rasterizer);

        CleanupStack::Pop(m_rasterizer););

    foreach (const QFileInfo &fontFileInfo, fontFiles) {

        const QString fontFile = QDir::toNativeSeparators(fontFileInfo.absoluteFilePath());

        TPtrC fontFilePtr(qt_QString2TPtrC(fontFile));

        QT_TRAP_THROWING(m_store->AddFileL(fontFilePtr));

    }

}

QSymbianFontDatabaseExtrasImplementation::~QSymbianFontDatabaseExtrasImplementation()

{

    typedef QList<const QSymbianTypeFaceExtras *>::iterator iterator;

    for (iterator p = m_extras.begin(); p != m_extras.end(); ++p) {

        m_store->ReleaseFont((*p)->fontOwner());

        delete *p;

    }

    delete m_store;

    m_heap->Close();

}

#ifndef FNTSTORE_H_INLINES_SUPPORT_FMM

/*

 Workaround: fntstore.h has an inlined function 'COpenFont* CBitmapFont::OpenFont()'

 that returns a private data member. The header will change between SDKs. But Qt has

 to build on any SDK version and run on other versions of Symbian OS.

 This function performs the needed pointer arithmetic to get the right COpenFont*

*/

COpenFont* OpenFontFromBitmapFont(const CBitmapFont* aBitmapFont)

{

    const TInt offsetIOpenFont = 92; // '_FOFF(CBitmapFont, iOpenFont)' ..if iOpenFont weren't private

    const TUint valueIOpenFont = *(TUint*)PtrAdd(aBitmapFont, offsetIOpenFont);

    return (valueIOpenFont & 1) ?

            (COpenFont*)PtrAdd(aBitmapFont, valueIOpenFont & ~1) : // New behavior: iOpenFont is offset

            (COpenFont*)valueIOpenFont; // Old behavior: iOpenFont is pointer

}

#endif // FNTSTORE_H_INLINES_SUPPORT_FMM

const QSymbianTypeFaceExtras *QSymbianFontDatabaseExtrasImplementation::extras(const QString &typeface,

                                                                               bool bold, bool italic) const

{

    const QString searchKey = typeface + QString::number(int(bold)) + QString::number(int(italic));

    if (!m_extrasHash.contains(searchKey)) {

        TFontSpec searchSpec(qt_QString2TPtrC(typeface), 1);

        if (bold)

            searchSpec.iFontStyle.SetStrokeWeight(EStrokeWeightBold);

        if (italic)

            searchSpec.iFontStyle.SetPosture(EPostureItalic);

        const TInt err = m_store->GetNearestFontToDesignHeightInPixels(font, searchSpec);

        Q_ASSERT(err == KErrNone && font);

        const CBitmapFont *bitmapFont = static_cast<CBitmapFont*>(font);

        COpenFont *openFont =

#ifdef FNTSTORE_H_INLINES_SUPPORT_FMM

            OpenFontFromBitmapFont(bitmapFont);

#endif // FNTSTORE_H_INLINES_SUPPORT_FMM

        const TOpenFontFaceAttrib* const attrib = openFont->FaceAttrib();

        const QString foundKey =

                QString((const QChar*)attrib->FullName().Ptr(), attrib->FullName().Length());

        if (!m_extrasHash.contains(foundKey)) {

            QSymbianTypeFaceExtras *extras = new QSymbianTypeFaceExtras(font, openFont);

            m_extras.append(extras);

            m_extrasHash.insert(searchKey, extras);

            m_extrasHash.insert(foundKey, extras);

        } else {

            m_store->ReleaseFont(font);

            m_extrasHash.insert(searchKey, m_extrasHash.value(foundKey));

        }

    }

    return m_extrasHash.value(searchKey);

}

class QFontEngineFTS60 : public QFontEngineFT

{

public:

    QFontEngineFTS60(const QFontDef &fd);

};

QFontEngineFTS60::QFontEngineFTS60(const QFontDef &fd)

    : QFontEngineFT(fd)

{

    default_hint_style = HintFull;

}

/*

 QFontEngineS60::pixelsToPoints, QFontEngineS60::pointsToPixels, QFontEngineMultiS60::QFontEngineMultiS60

 and QFontEngineMultiS60::QFontEngineMultiS60 should be in qfontengine_s60.cpp. But since also the

 Freetype based font rendering need them, they are here.

*/

qreal QFontEngineS60::pixelsToPoints(qreal pixels, Qt::Orientation orientation)

{

    return (orientation == Qt::Horizontal?

        S60->screenDevice()->HorizontalPixelsToTwips(pixels)

        :S60->screenDevice()->VerticalPixelsToTwips(pixels)) / KTwipsPerPoint;

}

qreal QFontEngineS60::pointsToPixels(qreal points, Qt::Orientation orientation)

{

    const int twips = points * KTwipsPerPoint;

    return orientation == Qt::Horizontal?

        S60->screenDevice()->HorizontalTwipsToPixels(twips)

        :S60->screenDevice()->VerticalTwipsToPixels(twips);

}

QFontEngineMultiS60::QFontEngineMultiS60(QFontEngine *first, int script, const QStringList &fallbackFamilies)

    : QFontEngineMulti(fallbackFamilies.size() + 1)

    , m_script(script)

    , m_fallbackFamilies(fallbackFamilies)

{

    engines[0] = first;

    first->ref.ref();

    fontDef = engines[0]->fontDef;

}

void QFontEngineMultiS60::loadEngine(int at)

{

    Q_ASSERT(at < engines.size());

    Q_ASSERT(engines.at(at) == 0);

    QFontDef request = fontDef;

    request.styleStrategy |= QFont::NoFontMerging;

    request.family = m_fallbackFamilies.at(at-1);

    engines[at] = QFontDatabase::findFont(m_script,

                                          /*fontprivate*/0,

                                          request);

    Q_ASSERT(engines[at]);

}

static void initializeDb()

{

    QFontDatabasePrivate *db = privateDb();

    if(!db || db->count)

        return;

    if (!db->symbianExtras)

        db->symbianExtras = new QSymbianFontDatabaseExtrasImplementation;

    QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);

    const int numTypeFaces = QS60Data::screenDevice()->NumTypefaces();

    const QSymbianFontDatabaseExtrasImplementation *dbExtras =

            static_cast<const QSymbianFontDatabaseExtrasImplementation*>(db->symbianExtras);

    bool fontAdded = false;

    for (int i = 0; i < numTypeFaces; i++) {

        TTypefaceSupport typefaceSupport;

        QS60Data::screenDevice()->TypefaceSupport(typefaceSupport, i);

        CFont *font; // We have to get a font instance in order to know all the details

        TFontSpec fontSpec(typefaceSupport.iTypeface.iName, 11);

        if (QS60Data::screenDevice()->GetNearestFontInPixels(font, fontSpec) != KErrNone)

            continue;

        if (font->TypeUid() == KCFbsFontUid) {

            TOpenFontFaceAttrib faceAttrib;

            const CFbsFont *cfbsFont = static_cast<const CFbsFont *>(font);

            cfbsFont->GetFaceAttrib(faceAttrib);

            QtFontStyle::Key styleKey;

            styleKey.style = faceAttrib.IsItalic()?QFont::StyleItalic:QFont::StyleNormal;

            styleKey.weight = faceAttrib.IsBold()?QFont::Bold:QFont::Normal;

            QString familyName((const QChar *)typefaceSupport.iTypeface.iName.Ptr(), typefaceSupport.iTypeface.iName.Length());

            QtFontFamily *family = db->family(familyName, true);

            family->fixedPitch = faceAttrib.IsMonoWidth();

            QtFontFoundry *foundry = family->foundry(QString(), true);

            QtFontStyle *style = foundry->style(styleKey, true);

            style->smoothScalable = typefaceSupport.iIsScalable;

            style->pixelSize(0, true);

            const QSymbianTypeFaceExtras *typeFaceExtras =

                    dbExtras->extras(familyName, faceAttrib.IsBold(), faceAttrib.IsItalic());

            const QByteArray os2Table = typeFaceExtras->getSfntTable(MAKE_TAG('O', 'S', '/', '2'));

            const unsigned char* data = reinterpret_cast<const unsigned char*>(os2Table.constData());

            const unsigned char* ulUnicodeRange = data + 42;

            quint32 unicodeRange[4] = {

                qFromBigEndian<quint32>(ulUnicodeRange),

                qFromBigEndian<quint32>(ulUnicodeRange + 4),

                qFromBigEndian<quint32>(ulUnicodeRange + 8),

                qFromBigEndian<quint32>(ulUnicodeRange + 12)

            };

            const unsigned char* ulCodePageRange = data + 78;

            quint32 codePageRange[2] = {

                qFromBigEndian<quint32>(ulCodePageRange),

                qFromBigEndian<quint32>(ulCodePageRange + 4)

            };

            const QList<QFontDatabase::WritingSystem> writingSystems =

                determineWritingSystemsFromTrueTypeBits(unicodeRange, codePageRange);

            foreach (const QFontDatabase::WritingSystem system, writingSystems)

                family->writingSystems[system] = QtFontFamily::Supported;

            fontAdded = true;

        }

    }

    Q_ASSERT(fontAdded);

    QDir dir(QDesktopServices::storageLocation(QDesktopServices::FontsLocation));

    dir.setNameFilters(QStringList() << QLatin1String("*.ttf")

                       << QLatin1String("*.ttc") << QLatin1String("*.pfa")

                       << QLatin1String("*.pfb"));

    for (int i = 0; i < int(dir.count()); ++i) {

        const QByteArray file = QFile::encodeName(dir.absoluteFilePath(dir[i]));

        db->addTTFile(file);

    }

}

static inline void load(const QString &family = QString(), int script = -1)

{

    Q_UNUSED(family)

    Q_UNUSED(script)

    initializeDb();

}

static void registerFont(QFontDatabasePrivate::ApplicationFont *fnt)

{

    Q_UNUSED(fnt);

}

bool QFontDatabase::removeApplicationFont(int handle)

{

    Q_UNUSED(handle);

    return false;

}

bool QFontDatabase::removeAllApplicationFonts()

{

    return false;

}

bool QFontDatabase::supportsThreadedFontRendering()

{

    return false;

}

static

QFontDef cleanedFontDef(const QFontDef &req)

{

    QFontDef result = req;

    if (result.pixelSize <= 0) {

        result.pixelSize = QFontEngineS60::pointsToPixels(qMax(qreal(1.0), result.pointSize));

        result.pointSize = 0;

    }

    return result;

}

QFontEngine *QFontDatabase::findFont(int script, const QFontPrivate *, const QFontDef &req)

{

    const QFontCache::Key key(cleanedFontDef(req), script);

    if (!privateDb()->count)

        initializeDb();

    QFontEngine *fe = QFontCache::instance()->findEngine(key);

    if (!fe) {

        // Making sure that fe->fontDef.family will be an existing font.

        initializeDb();

        QFontDatabasePrivate *db = privateDb();

        QtFontDesc desc;

        QList<int> blacklistedFamilies;

        match(script, req, req.family, QString(), -1, &desc, blacklistedFamilies);

        if (!desc.family) // falling back to application font

            desc.family = db->family(QApplication::font().defaultFamily());

        Q_ASSERT(desc.family);

        // Making sure that desc.family supports the requested script

        QtFontDesc mappedDesc;

        bool supportsScript = false;

        do {

            match(script, req, QString(), QString(), -1, &mappedDesc, blacklistedFamilies);

            if (mappedDesc.family == desc.family) {

                supportsScript = true;

                break;

            }

            blacklistedFamilies.append(mappedDesc.familyIndex);

        } while (mappedDesc.family);

        if (!supportsScript) {

            blacklistedFamilies.clear();

            match(script, req, QString(), QString(), -1, &mappedDesc, blacklistedFamilies);

            if (mappedDesc.family)

                desc = mappedDesc;

        }

        const QString fontFamily = desc.family->name;

        QFontDef request = req;

        request.family = fontFamily;

        const QSymbianFontDatabaseExtrasImplementation *dbExtras =

                static_cast<const QSymbianFontDatabaseExtrasImplementation*>(db->symbianExtras);

        const QSymbianTypeFaceExtras *typeFaceExtras =

                dbExtras->extras(fontFamily, request.weight > QFont::Normal, request.style != QFont::StyleNormal);

        fe = new QFontEngineS60(request, typeFaceExtras);

        QFontEngine::FaceId faceId;

        const QtFontFamily * const reqQtFontFamily = db->family(fontFamily);

        faceId.filename = reqQtFontFamily->fontFilename;

        faceId.index = reqQtFontFamily->fontFileIndex;

        QFontEngineFTS60 *fte = new QFontEngineFTS60(cleanedFontDef(request));

        if (fte->init(faceId, true, QFontEngineFT::Format_A8))

            fe = fte;

        else

            delete fte;

        Q_ASSERT(fe);

        if (script == QUnicodeTables::Common

            && !(req.styleStrategy & QFont::NoFontMerging)

            && !fe->symbol) {

            QStringList commonFonts;

            for (int ws = 1; ws < QFontDatabase::WritingSystemsCount; ++ws) {

                if (scriptForWritingSystem[ws] != script)

                    continue;

                for (int i = 0; i < db->count; ++i) {

                    if (db->families[i]->writingSystems[ws] & QtFontFamily::Supported)

                        commonFonts.append(db->families[i]->name);

                }

            }

            // Hack: Prioritize .ccc fonts

            const QString niceEastAsianFont(QLatin1String("Sans MT 936_S60"));

            if (commonFonts.removeAll(niceEastAsianFont) > 0)

                commonFonts.prepend(niceEastAsianFont);

            fe = new QFontEngineMultiS60(fe, script, commonFonts);

        }

    }

    fe->ref.ref();

    QFontCache::instance()->insertEngine(key, fe);

    return fe;

}

void QFontDatabase::load(const QFontPrivate *d, int script)

{

    QFontEngine *fe = 0;

    QFontDef req = d->request;