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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef GLOBALRECEIVER_V2_H
#define GLOBALRECEIVER_V2_H
#include <sbkpython.h>
#include "dynamicqmetaobject.h"
#include <QtCore/QtCompare>
#include <QtCore/QByteArray>
#include <QtCore/QHashFunctions>
#include <QtCore/QObject>
#include <QtCore/QPointer>
#include <QtCore/QMap>
#include <memory>
QT_FORWARD_DECLARE_CLASS(QDebug);
namespace PySide
{
class DynamicSlotDataV2;
class GlobalReceiverV2;
struct GlobalReceiverKey
{
const PyObject *object;
const PyObject *method;
friend constexpr size_t qHash(GlobalReceiverKey k, size_t seed = 0) noexcept
{
return qHashMulti(seed, k.object, k.method);
}
friend constexpr bool comparesEqual(const GlobalReceiverKey &lhs,
const GlobalReceiverKey &rhs) noexcept
{
return lhs.object == rhs.object && lhs.method == rhs.method;
}
Q_DECLARE_EQUALITY_COMPARABLE_LITERAL_TYPE(GlobalReceiverKey)
};
/// A class used to link C++ Signals to non C++ slots (Python callbacks) by
/// providing fake slots for QObject::connect().
/// It keeps a Python callback and the list of QObject senders. It is stored
/// in SignalManager by a hash of the Python callback.
class GlobalReceiverV2 : public QObject
{
public:
Q_DISABLE_COPY_MOVE(GlobalReceiverV2)
/// Create a GlobalReceiver object that will call 'callback'
/// @param callback A Python callable object (can be a method or not)
explicit GlobalReceiverV2(PyObject *callback, QObject *receiver = nullptr);
~GlobalReceiverV2() override;
/// Reimplemented function from QObject
int qt_metacall(QMetaObject::Call call, int id, void **args) override;
const QMetaObject *metaObject() const override;
/// Add a extra slot to this object
/// @param signature The signature of the slot to be added
/// @return The index of this slot on metaobject
int addSlot(const char *signature);
/// Notify to GlobalReceiver about when a new connection was made
void notify();
/// Used to increment the reference of the GlobalReceiver object
/// @param link This is a parameter used to link the ref to
/// some QObject life.
void incRef(const QObject *link);
/// Used to decrement the reference of the GlobalReceiver object.
/// @param link This is a parameter used to dismiss the link
/// ref to some QObject.
void decRef(const QObject *link);
/// Returns whether any senders are registered.
bool isEmpty() const;
/// Use to retrieve the unique hash of this GlobalReceiver object
/// @return hash key
GlobalReceiverKey key() const;
/// Use to retrieve the unique hash of the PyObject based on GlobalReceiver rules
/// @param callback The Python callable object used to calculate the id
/// @return hash key
static GlobalReceiverKey key(PyObject *callback);
const MetaObjectBuilder &metaObjectBuilder() const { return m_metaObject; }
MetaObjectBuilder &metaObjectBuilder() { return m_metaObject; }
static const char *senderDynamicProperty;
void formatDebug(QDebug &debug) const;
private:
void purgeDeletedSenders();
MetaObjectBuilder m_metaObject;
DynamicSlotDataV2 *m_data;
using QObjectPointer = QPointer<const QObject>;
QList<QObjectPointer> m_refs;
QPointer<QObject> m_receiver;
};
QDebug operator<<(QDebug debug, const GlobalReceiverV2 *g);
}
#endif
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