qt-everywhere-src-5.14.1/qtbase/src/gui/text/qfontdatabase.h

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#ifndef QFONTDATABASE_H
#define QFONTDATABASE_H

#include <QtGui/qtguiglobal.h>
#include <QtGui/qwindowdefs.h>
#include <QtCore/qstring.h>
#include <QtGui/qfont.h>

QT_BEGIN_NAMESPACE


class QStringList;
template <class T> class QList;
struct QFontDef;
class QFontEngine;

class QFontDatabasePrivate;

class Q_GUI_EXPORT QFontDatabase
{
    Q_GADGET
public:
    // do not re-order or delete entries from this enum without updating the
    // QPF2 format and makeqpf!!
    enum WritingSystem {
        Any,

        Latin,
        Greek,
        Cyrillic,
        Armenian,
        Hebrew,
        Arabic,
        Syriac,
        Thaana,
        Devanagari,
        Bengali,
        Gurmukhi,
        Gujarati,
        Oriya,
        Tamil,
        Telugu,
        Kannada,
        Malayalam,
        Sinhala,
        Thai,
        Lao,
        Tibetan,
        Myanmar,
        Georgian,
        Khmer,
        SimplifiedChinese,
        TraditionalChinese,
        Japanese,
        Korean,
        Vietnamese,

        Symbol,
        Other = Symbol,

        Ogham,
        Runic,
        Nko,

        WritingSystemsCount
    };
    Q_ENUM(WritingSystem)

    enum SystemFont {
        GeneralFont,
        FixedFont,
        TitleFont,
        SmallestReadableFont
    };
    Q_ENUM(SystemFont)

    static QList<int> standardSizes();

    QFontDatabase();

    QList<WritingSystem> writingSystems() const;
    QList<WritingSystem> writingSystems(const QString &family) const;

    QStringList families(WritingSystem writingSystem = Any) const;
    QStringList styles(const QString &family) const;
    QList<int> pointSizes(const QString &family, const QString &style = QString());
    QList<int> smoothSizes(const QString &family, const QString &style);
    QString styleString(const QFont &font);
    QString styleString(const QFontInfo &fontInfo);

    QFont font(const QString &family, const QString &style, int pointSize) const;

    bool isBitmapScalable(const QString &family, const QString &style = QString()) const;
    bool isSmoothlyScalable(const QString &family, const QString &style = QString()) const;
    bool isScalable(const QString &family, const QString &style = QString()) const;
    bool isFixedPitch(const QString &family, const QString &style = QString()) const;

    bool italic(const QString &family, const QString &style) const;
    bool bold(const QString &family, const QString &style) const;
    int weight(const QString &family, const QString &style) const;

    bool hasFamily(const QString &family) const;
    bool isPrivateFamily(const QString &family) const;

    static QString writingSystemName(WritingSystem writingSystem);
    static QString writingSystemSample(WritingSystem writingSystem);

    static int addApplicationFont(const QString &fileName);
    static int addApplicationFontFromData(const QByteArray &fontData);
    static QStringList applicationFontFamilies(int id);
    static bool removeApplicationFont(int id);
    static bool removeAllApplicationFonts();

#if QT_DEPRECATED_SINCE(5, 2)
    QT_DEPRECATED static bool supportsThreadedFontRendering();
#endif

    static QFont systemFont(SystemFont type);

private:
    static void createDatabase();
    static void parseFontName(const QString &name, QString &foundry, QString &family);
    static QString resolveFontFamilyAlias(const QString &family);
    static QFontEngine *findFont(const QFontDef &request, int script /* QChar::Script */);
    static void load(const QFontPrivate *d, int script /* QChar::Script */);

    friend struct QFontDef;
    friend class QFontPrivate;
    friend class QFontDialog;
    friend class QFontDialogPrivate;
    friend class QFontEngineMulti;
    friend class QRawFont;

    QFontDatabasePrivate *d;
};

QT_END_NAMESPACE

#endif // QFONTDATABASE_H