#include "toonzqt/tselectionhandle.h"

#include "toonzqt/selection.h"

//=============================================================================

// TSelectionHandle

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

TSelectionHandle::TSelectionHandle()

{

	m_selectionStack.push_back(0);

}

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

TSelectionHandle::~TSelectionHandle()

{

}

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

TSelection *TSelectionHandle::getSelection() const

{

	return m_selectionStack.back();

}

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

void TSelectionHandle::setSelection(TSelection *selection)

{

	if (getSelection() == selection)

		return;

	TSelection *oldSelection = getSelection();

	if (oldSelection) {

		oldSelection->selectNone();

		// disable selection related commands

		CommandManager *commandManager = CommandManager::instance();

		int i;

		for (i = 0; i < (int)m_enabledCommandIds.size(); i++)

			commandManager->setHandler(m_enabledCommandIds[i].c_str(), 0);

		m_enabledCommandIds.clear();

	}

	m_selectionStack.back() = selection;

	if (selection)

		selection->enableCommands();

	emit selectionSwitched(oldSelection, selection);

}

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

void TSelectionHandle::pushSelection()

{

	//NOTE

	//  We push 0, and NOT a copy of the last item. I think this is done on purpose,

	//  as having it copied and then selecting a different one invokes selectNone()

	//  on the former.

	m_selectionStack.push_back(0);

}

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

void TSelectionHandle::popSelection()

{

	if (m_selectionStack.size() > 1)

		m_selectionStack.pop_back();

	TSelection *selection = getSelection();

	if (selection)

		selection->enableCommands();

}

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

void TSelectionHandle::enableCommand(std::string cmdId, CommandHandlerInterface *handler)

{

	CommandManager::instance()->setHandler(cmdId.c_str(), handler);

	m_enabledCommandIds.push_back(cmdId);

}

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

void TSelectionHandle::notifySelectionChanged()

{

	emit selectionChanged(m_selectionStack.back());

}

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

TSelectionHandle *TSelectionHandle::getCurrent()

{

	static TSelectionHandle _currentSelection;

	return &_currentSelection;

}