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/******************************************************************************
* Copyright (C) 2016 Kitsune Ral <kitsune-ral@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <QtCore/QMetaEnum>
#include <QtCore/QDebug>
#include <QtCore/QPointer>
#include <functional>
#include <memory>
namespace QMatrixClient
{
// The below enables pretty-printing of enums in logs
#if (QT_VERSION >= QT_VERSION_CHECK(5, 5, 0))
#define REGISTER_ENUM(EnumName) Q_ENUM(EnumName)
#else
// Thanks to Olivier for spelling it and for making Q_ENUM to replace it:
// https://woboq.com/blog/q_enum.html
#define REGISTER_ENUM(EnumName) \
Q_ENUMS(EnumName) \
friend QDebug operator<<(QDebug dbg, EnumName val) \
{ \
static int enumIdx = staticMetaObject.indexOfEnumerator(#EnumName); \
return dbg << Event::staticMetaObject.enumerator(enumIdx).valueToKey(int(val)); \
}
#endif
/** static_cast<> for unique_ptr's */
template <typename T1, typename PtrT2>
inline auto unique_ptr_cast(PtrT2&& p)
{
return std::unique_ptr<T1>(static_cast<T1*>(p.release()));
}
#if QT_VERSION < QT_VERSION_CHECK(5, 7, 0)
// Copy-pasted from Qt 5.10
template <typename T>
Q_DECL_CONSTEXPR typename std::add_const<T>::type &qAsConst(T &t) Q_DECL_NOTHROW { return t; }
// prevent rvalue arguments:
template <typename T>
static void qAsConst(const T &&) Q_DECL_EQ_DELETE;
#endif
/** A guard pointer that disconnects an interested object upon destruction
* It's almost QPointer<> except that you have to initialise it with one
* more additional parameter - a pointer to a QObject that will be
* disconnected from signals of the underlying pointer upon the guard's
* destruction.
*/
template <typename T>
class ConnectionsGuard : public QPointer<T>
{
public:
ConnectionsGuard(T* publisher, QObject* subscriber)
: QPointer<T>(publisher), subscriber(subscriber)
{ }
~ConnectionsGuard()
{
if (*this)
(*this)->disconnect(subscriber);
}
ConnectionsGuard(ConnectionsGuard&&) = default;
ConnectionsGuard& operator=(ConnectionsGuard&&) = default;
ConnectionsGuard& operator=(const ConnectionsGuard&) = delete;
using QPointer<T>::operator=;
private:
QObject* subscriber;
};
} // namespace QMatrixClient
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