#include "toonz/txshlevelhandle.h"

#include "toonz/txshlevel.h"
#include "toonz/txshsimplelevel.h"
#include "toonz/txsheet.h"
#include "toonz/txshcell.h"

//=============================================================================
// TXshLevelHandle
//-----------------------------------------------------------------------------

TXshLevelHandle::TXshLevelHandle()
	: m_level(0)
{
}

//-----------------------------------------------------------------------------

TXshLevelHandle::~TXshLevelHandle()
{
	if (m_level)
		m_level->release();
}

//-----------------------------------------------------------------------------

TXshLevel *TXshLevelHandle::getLevel() const
{
	return m_level;
}

//-----------------------------------------------------------------------------

TXshSimpleLevel *TXshLevelHandle::getSimpleLevel() const
{
	if (!m_level)
		return 0;
	else
		return m_level->getSimpleLevel();
}

//-----------------------------------------------------------------------------

void TXshLevelHandle::setLevel(TXshLevel *level)
{
	if (m_level == level)
		return;

	TXshLevel *oldLevel = m_level;
	m_level = level;
	if (level)
		level->addRef();
	bool levelExists = oldLevel ? oldLevel->getRefCount() > 1 : false;
	if (oldLevel)
		oldLevel->release();
	emit xshLevelSwitched(levelExists ? oldLevel : 0);
}

//-----------------------------------------------------------------------------