/*
    Scan Tailor - Interactive post-processing tool for scanned pages.
    Copyright (C) 2007-2015  Joseph Artsimovich <joseph.artsimovich@gmail.com>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef SAFE_DELETING_QOBJECT_PTR_H_
#define SAFE_DELETING_QOBJECT_PTR_H_

#include "foundation_config.h"
#include "NonCopyable.h"

template<typename T>
class SafeDeletingQObjectPtr
{
	DECLARE_NON_COPYABLE(SafeDeletingQObjectPtr)
public:
	SafeDeletingQObjectPtr(T* obj = 0) : m_pObj(obj) {}
	
	~SafeDeletingQObjectPtr() {
		if (m_pObj) {
			m_pObj->disconnect();
			m_pObj->deleteLater();
		}
	}

	void reset(T* other) { SafeDeletingQObjectPtr(other).swap(*this); }
	
	T& operator*() const { return *m_pObj; }
	
	T* operator->() const { return m_pObj; }
	
	T* get() const { return m_pObj; }

	void swap(SafeDeletingQObjectPtr& other) {
		T* tmp = m_pObj;
		m_pObj = other.m_pObj;
		other.m_pObj = tmp;
	}
private:
	T* m_pObj;
};

template<typename T>
void swap(SafeDeletingQObjectPtr<T>& o1, SafeDeletingQObjectPtr<T>& o2)
{
	o1.swap(o2);
}

#endif
