/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Copyright (C) 2016 Ivailo Monev
**
** This file is part of the QtCore module of the Katie Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
**
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QOBJECT_H
#define QOBJECT_H

#ifndef QT_NO_QOBJECT

#include <QtCore/qobjectdefs.h>
#include <QtCore/qstring.h>
#include <QtCore/qlist.h>


QT_BEGIN_NAMESPACE


class QEvent;
class QTimerEvent;
class QChildEvent;
struct QMetaObject;
class QVariant;
class QObjectPrivate;
class QObject;
class QThread;
class QWidget;
class QDebug;
#ifndef QT_NO_REGEXP
class QRegExp;
#endif

typedef QList<QObject*> QObjectList;

Q_CORE_EXPORT void qt_qFindChildren_helper(const QObject *parent, const QString &name, const QRegExp *re,
                                           const QMetaObject &mo, QList<void *> *list);
Q_CORE_EXPORT QObject *qt_qFindChild_helper(const QObject *parent, const QString &name, const QMetaObject &mo);

class QObjectData {
public:
    QObjectData();
    virtual ~QObjectData() = 0;
    QObject *q_ptr;
    QObject *parent;
    QObjectList children;

    bool isWidget;
    bool pendTimer;
    bool blockSig;
    bool wasDeleted;
    bool sendChildEvents;
    bool receiveChildEvents;
    bool inThreadChangeEvent;
    int postedEvents;
    QMetaObject *metaObject; // assert dynamic
};


class Q_CORE_EXPORT QObject
{
    Q_OBJECT
    Q_PROPERTY(QString objectName READ objectName WRITE setObjectName)
    Q_DECLARE_PRIVATE(QObject)

public:
    Q_INVOKABLE explicit QObject(QObject *parent = nullptr);
    virtual ~QObject();

    virtual bool event(QEvent *);
    virtual bool eventFilter(QObject *, QEvent *);

#ifndef QT_NO_TRANSLATION
    static QString tr(const char *sourceText);
    static QString trUtf8(const char *sourceText);
#else
    static QString tr(const char *sourceText)
        { return QString::fromLatin1(sourceText); }
#ifndef QT_NO_TEXTCODEC
    static QString trUtf8(const char *sourceText)
        { return QString::fromUtf8(sourceText); }
#endif
#endif //QT_NO_TRANSLATION

    QString objectName() const;
    void setObjectName(const QString &name);

    inline bool isWidgetType() const { return d_ptr->isWidget; }

    inline bool signalsBlocked() const { return d_ptr->blockSig; }
    bool blockSignals(bool b);

    QThread *thread() const;
    void moveToThread(QThread *thread);

    int startTimer(int interval);
    void killTimer(int id);

    template<typename T>
    inline T findChild(const QString &aName = QString()) const
    { return static_cast<T>(qt_qFindChild_helper(this, aName, reinterpret_cast<T>(0)->staticMetaObject)); }

    template<typename T>
    inline QList<T> findChildren(const QString &aName = QString()) const
    {
        QList<T> list;
        union {
            QList<T> *typedList;
            QList<void *> *voidList;
        } u;
        u.typedList = &list;
        qt_qFindChildren_helper(this, aName, nullptr, reinterpret_cast<T>(0)->staticMetaObject, u.voidList);
        return list;
    }

#ifndef QT_NO_REGEXP
    template<typename T>
    inline QList<T> findChildren(const QRegExp &re) const
    {
        QList<T> list;
        union {
            QList<T> *typedList;
            QList<void *> *voidList;
        } u;
        u.typedList = &list;
        qt_qFindChildren_helper(this, QString(), &re, reinterpret_cast<T>(0)->staticMetaObject, u.voidList);
        return list;
    }
#endif

    inline const QObjectList &children() const { return d_ptr->children; }

    void setParent(QObject *);
    void installEventFilter(QObject *);
    void removeEventFilter(QObject *);


    static bool connect(const QObject *sender, const char *signal,
                        const QObject *receiver, const char *member,
                        Qt::ConnectionType type = Qt::AutoConnection
        );

    static bool connect(const QObject *sender, const QMetaMethod &signal,
                        const QObject *receiver, const QMetaMethod &method,
                        Qt::ConnectionType type = Qt::AutoConnection
        );

    inline bool connect(const QObject *sender, const char *signal,
                        const char *member,
                        Qt::ConnectionType type = Qt::AutoConnection
        ) const
        { return connect(sender, signal, this, member, type); }


    static bool disconnect(const QObject *sender, const char *signal,
                           const QObject *receiver, const char *member);
    static bool disconnect(const QObject *sender, const QMetaMethod &signal,
                           const QObject *receiver, const QMetaMethod &member);
    inline bool disconnect(const char *signal = nullptr,
                           const QObject *receiver = nullptr, const char *member = nullptr)
        { return disconnect(this, signal, receiver, member); }
    inline bool disconnect(const QObject *receiver, const char *member = nullptr)
        { return disconnect(this, nullptr, receiver, member); }

    void dumpObjectTree();
    void dumpObjectInfo();

#ifndef QT_NO_PROPERTIES
    bool setProperty(const char *name, const QVariant &value);
    QVariant property(const char *name) const;
    QList<QByteArray> dynamicPropertyNames() const;
#endif // QT_NO_PROPERTIES

Q_SIGNALS:
    void destroyed(QObject * = nullptr);

public:
    inline QObject *parent() const { return d_ptr->parent; }

    inline bool inherits(const char *classname) const
        { return const_cast<QObject *>(this)->qt_metacast(classname) != nullptr; }

public Q_SLOTS:
    void deleteLater();

protected:
    QObject *sender() const;
    int senderSignalIndex() const;
    int receivers(const char* signal) const;

    virtual void timerEvent(QTimerEvent *);
    virtual void childEvent(QChildEvent *);
    virtual void customEvent(QEvent *);

    virtual void connectNotify(const char *signal);
    virtual void disconnectNotify(const char *signal);

    QObject(QObjectPrivate &dd, QObject *parent = nullptr);

    QObjectData* d_ptr;

    static const QMetaObject staticQtMetaObject;

    friend struct QMetaObject;
    friend class QApplication;
    friend class QApplicationPrivate;
    friend class QCoreApplication;
    friend class QCoreApplicationPrivate;
    friend class QWidget;
    friend class QThreadData;

private:
    Q_DISABLE_COPY(QObject)
    Q_PRIVATE_SLOT(d_func(), void _q_reregisterTimers(void *))
};

template <class T>
inline T qobject_cast(QObject *object)
{
#if !defined(QT_NO_QOBJECT_CHECK)
    if (!object) {
        return nullptr;
    }
    reinterpret_cast<T>(object)->qt_check_for_QOBJECT_macro(*reinterpret_cast<T>(object));
#endif
    return static_cast<T>(reinterpret_cast<T>(object)->staticMetaObject.cast(object));
}

template <class T>
inline T qobject_cast(const QObject *object)
{
#if !defined(QT_NO_QOBJECT_CHECK)
    if (!object) {
        return nullptr;
    }
    reinterpret_cast<T>(object)->qt_check_for_QOBJECT_macro(*reinterpret_cast<T>(object));
#endif
    return static_cast<T>(reinterpret_cast<T>(object)->staticMetaObject.cast(object));
}


template <class T> inline const char * qobject_interface_iid()
{ return nullptr; }

#ifndef Q_MOC_RUN
#  define Q_DECLARE_INTERFACE(IFace, IId) \
    QT_BEGIN_NAMESPACE \
    template <> inline const char *qobject_interface_iid<IFace *>() \
    { return IId; } \
    template <> inline IFace *qobject_cast<IFace *>(QObject *object) \
    { return reinterpret_cast<IFace *>((object ? object->qt_metacast(IId) : nullptr)); } \
    template <> inline IFace *qobject_cast<IFace *>(const QObject *object) \
    { return reinterpret_cast<IFace *>((object ? const_cast<QObject *>(object)->qt_metacast(IId) : nullptr)); } \
    QT_END_NAMESPACE
#endif // Q_MOC_RUN

#ifndef QT_NO_DEBUG_STREAM
Q_CORE_EXPORT QDebug operator<<(QDebug, const QObject *);
#endif

QT_END_NAMESPACE


#endif

#endif // QOBJECT_H
