/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2014 Olivier Goffart <ogoffart@woboq.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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****************************************************************************/

#ifndef QMETAOBJECT_P_H
#define QMETAOBJECT_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of moc.  This header file may change from version to version without notice,
// or even be removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>
#include <QtCore/qobjectdefs.h>
#include <QtCore/qmutex.h>
#ifndef QT_NO_QOBJECT
#include <private/qobject_p.h> // For QObjectPrivate::Connection
#endif
#include <QtCore/qvarlengtharray.h>

QT_BEGIN_NAMESPACE
// ### TODO Qt6: add a proper namespace with Q_NAMESPACE and use scoped enums
// A namespace and scoped are needed to avoid enum clashes

enum PropertyFlags  {
    Invalid = 0x00000000,
    Readable = 0x00000001,
    Writable = 0x00000002,
    Resettable = 0x00000004,
    EnumOrFlag = 0x00000008,
    StdCppSet = 0x00000100,
//     Override = 0x00000200,
    Constant = 0x00000400,
    Final = 0x00000800,
    Designable = 0x00001000,
    ResolveDesignable = 0x00002000,
    Scriptable = 0x00004000,
    ResolveScriptable = 0x00008000,
    Stored = 0x00010000,
    ResolveStored = 0x00020000,
    Editable = 0x00040000,
    ResolveEditable = 0x00080000,
    User = 0x00100000,
    ResolveUser = 0x00200000,
    Notify = 0x00400000,
    Revisioned = 0x00800000
};

enum MethodFlags  {
    AccessPrivate = 0x00,
    AccessProtected = 0x01,
    AccessPublic = 0x02,
    AccessMask = 0x03, //mask

    MethodMethod = 0x00,
    MethodSignal = 0x04,
    MethodSlot = 0x08,
    MethodConstructor = 0x0c,
    MethodTypeMask = 0x0c,

    MethodCompatibility = 0x10,
    MethodCloned = 0x20,
    MethodScriptable = 0x40,
    MethodRevisioned = 0x80
};

enum MetaObjectFlags { // keep it in sync with QMetaObjectBuilder::MetaObjectFlag enum
    DynamicMetaObject = 0x01,
    RequiresVariantMetaObject = 0x02,
    PropertyAccessInStaticMetaCall = 0x04 // since Qt 5.5, property code is in the static metacall
};

enum MetaDataFlags {
    IsUnresolvedType = 0x80000000,
    TypeNameIndexMask = 0x7FFFFFFF,
    IsUnresolvedSignal = 0x70000000
};

enum EnumFlags {
    EnumIsFlag = 0x1,
    EnumIsScoped = 0x2
};

extern int qMetaTypeTypeInternal(const char *);

class QArgumentType
{
public:
    QArgumentType(int type)
        : _type(type)
    {}
    QArgumentType(const QByteArray &name)
        : _type(qMetaTypeTypeInternal(name.constData())), _name(name)
    {}
    QArgumentType()
        : _type(0)
    {}
    int type() const
    { return _type; }
    QByteArray name() const
    {
        if (_type && _name.isEmpty())
            const_cast<QArgumentType *>(this)->_name = QMetaType::typeName(_type);
        return _name;
    }
    bool operator==(const QArgumentType &other) const
    {
        if (_type && other._type)
            return _type == other._type;
        else
            return name() == other.name();
    }
    bool operator!=(const QArgumentType &other) const
    {
        if (_type && other._type)
            return _type != other._type;
        else
            return name() != other.name();
    }

private:
    int _type;
    QByteArray _name;
};
Q_DECLARE_TYPEINFO(QArgumentType, Q_MOVABLE_TYPE);

typedef QVarLengthArray<QArgumentType, 10> QArgumentTypeArray;

class QMetaMethodPrivate;

struct QMetaObjectPrivate
{
    // revision 7 is Qt 5.0 everything lower is not supported
    // revision 8 is Qt 5.12: It adds the enum name to QMetaEnum
    enum { OutputRevision = 8 }; // Used by moc, qmetaobjectbuilder and qdbus

    int revision;
    int className;
    int classInfoCount, classInfoData;
    int methodCount, methodData;
    int propertyCount, propertyData;
    int enumeratorCount, enumeratorData;
    int constructorCount, constructorData;
    int flags;
    int signalCount;

    static inline const QMetaObjectPrivate *get(const QMetaObject *metaobject)
    { return reinterpret_cast<const QMetaObjectPrivate*>(metaobject->d.data); }

    static int originalClone(const QMetaObject *obj, int local_method_index);

    static QByteArray decodeMethodSignature(const char *signature,
                                            QArgumentTypeArray &types);
    static int indexOfSignalRelative(const QMetaObject **baseObject,
                                     const QByteArray &name, int argc,
                                     const QArgumentType *types);
    static int indexOfSlotRelative(const QMetaObject **m,
                                   const QByteArray &name, int argc,
                                   const QArgumentType *types);
    static int indexOfSignal(const QMetaObject *m, const QByteArray &name,
                             int argc, const QArgumentType *types);
    static int indexOfSlot(const QMetaObject *m, const QByteArray &name,
                           int argc, const QArgumentType *types);
    static int indexOfMethod(const QMetaObject *m, const QByteArray &name,
                             int argc, const QArgumentType *types);
    static int indexOfConstructor(const QMetaObject *m, const QByteArray &name,
                                  int argc, const QArgumentType *types);
    Q_CORE_EXPORT static QMetaMethod signal(const QMetaObject *m, int signal_index);
    static inline int signalOffset(const QMetaObject *m) {
        Q_ASSERT(m != nullptr);
        int offset = 0;
        for (m = m->d.superdata; m; m = m->d.superdata)
            offset += reinterpret_cast<const QMetaObjectPrivate*>(m->d.data)->signalCount;
        return offset;
    }
    Q_CORE_EXPORT static int absoluteSignalCount(const QMetaObject *m);
    Q_CORE_EXPORT static int signalIndex(const QMetaMethod &m);
    static bool checkConnectArgs(int signalArgc, const QArgumentType *signalTypes,
                                 int methodArgc, const QArgumentType *methodTypes);
    static bool checkConnectArgs(const QMetaMethodPrivate *signal,
                                 const QMetaMethodPrivate *method);

    static QList<QByteArray> parameterTypeNamesFromSignature(const char *signature);

#ifndef QT_NO_QOBJECT
    //defined in qobject.cpp
    enum DisconnectType { DisconnectAll, DisconnectOne };
    static void memberIndexes(const QObject *obj, const QMetaMethod &member,
                              int *signalIndex, int *methodIndex);
    static QObjectPrivate::Connection *connect(const QObject *sender, int signal_index,
                        const QMetaObject *smeta,
                        const QObject *receiver, int method_index_relative,
                        const QMetaObject *rmeta = nullptr,
                        int type = 0, int *types = nullptr);
    static bool disconnect(const QObject *sender, int signal_index,
                           const QMetaObject *smeta,
                           const QObject *receiver, int method_index, void **slot,
                           DisconnectType = DisconnectAll);
    static inline bool disconnectHelper(QObjectPrivate::ConnectionData *connections, int signalIndex,
                                        const QObject *receiver, int method_index, void **slot,
                                        QBasicMutex *senderMutex, DisconnectType = DisconnectAll);
#endif
};

// For meta-object generators

enum { MetaObjectPrivateFieldCount = sizeof(QMetaObjectPrivate) / sizeof(int) };

#ifndef UTILS_H
// mirrored in moc's utils.h
static inline bool is_ident_char(char s)
{
    return ((s >= 'a' && s <= 'z')
            || (s >= 'A' && s <= 'Z')
            || (s >= '0' && s <= '9')
            || s == '_'
       );
}

static inline bool is_space(char s)
{
    return (s == ' ' || s == '\t');
}
#endif

/*
    This function is shared with moc.cpp. The implementation lives in qmetaobject_moc_p.h, which
    should be included where needed. The declaration here is not used to avoid warnings from
    the compiler about unused functions.

static QByteArray normalizeTypeInternal(const char *t, const char *e, bool fixScope = false, bool adjustConst = true);
*/

QT_END_NAMESPACE

#endif