#ifndef LEVELSELECTION_H

#define LEVELSELECTION_H

// TnzQt includes

#include "toonzqt/selection.h"

// TnzCore includes

#include "tcommon.h"

// STD includes

#include <set></set>

#undef DVAPI

#undef DVVAR

#ifdef TNZTOOLS_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

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

//  Forward declarations

class TVectorImage;

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

//*******************************************************************************

//    LevelSelection  declaration

//*******************************************************************************

/*!

  \brief    Selection type for level-based multi-frame selections targetting

            primitives described by predefined filtering functions.

*/

class DVAPI LevelSelection : public TSelection

{

public:

	enum FramesMode //!  Possible frames selection modes.

	{

		FRAMES_NONE,	 //!< No frame is selected.

		FRAMES_CURRENT,  //!< Selects the (context-defined) current frame.

		FRAMES_SELECTED, //!< Selects the frames specified in \p TTool::getSelectedFrames().

		FRAMES_ALL,		 //!< Selects the whole level.

	};

	enum Filter //!  Possible selection filters.

	{

		EMPTY,			  //!< Selection is empty - everyting is filtered out.

		WHOLE,			  //!< Selects everything - nothing is filtered out.

		SELECTED_STYLES,  //!< Acts only entities with selected palette styles.

		BOUNDARY_STROKES, //!< Acts only on boundary strokes (applies only to vector images).

	};

	typedef std::set<int> styles_container; //!< Container of style indexes used together with the</int>

											//!  \p SELECTED_STYLES filter.

public:

	LevelSelection(); //!< Constructs an empty level selection.

	/*! \remark   The selection is hereby considered empty \a only if it either has

                FramesMode FRAMES_NONE or Filter EMPTY. It is user's responsibility

                to check whether nontrivial selections are empty or not.                      */

	bool isEmpty() const; //!< Returns whether the selection is empty.

	void selectNone();	//!< Resets the selection to empty. This is functionally

						  //!  equivalent to <tt>operator=(LevelSelection());</tt>

	FramesMode framesMode() const

	{

		return m_framesMode;

	}

	FramesMode &framesMode() //!  Returns current frames selection mode.

	{

		return m_framesMode;

	}

	Filter filter() const

	{

		return m_filter;

	}

	Filter &filter() //!  Returns current styles selection mode.

	{

		return m_filter;

	}

	const styles_container &styles() const

	{

		return m_styles;

	}

	styles_container &styles()

	{

		return m_styles;

	} //!< Returns selected palette styles used with the

	  //!  \p SELECTED_STYLES filter.

private:

	FramesMode m_framesMode; //!< Selected level frames.

	Filter m_filter;		 //!< Selection filter.

	std::set<int> m_styles; //!< Selected palette styles used with the \p SELECTED_STYLES filter.</int>

};

//*******************************************************************************

//    Related standalone functions

//*******************************************************************************

/*!

  \brief    Calculates the strokes on the boundary of a vector image.

  \details  Boundary strokes are those with a side entirely adjacent

            to a region with style index \p 0.

  \return   The indexes of boundary strokes in the input image.

*/

DVAPI std::vector<int> getBoundaryStrokes(TVectorImage &vi);</int>

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

/*!

  \brief    Applies a selection filter to a given vector image.

  \return   The stroke indexes included in the filtered selection.

  \remark   In case the filter is LevelSelection::BOUNDARY_STROKES, the resulting

            selection is composed of all strokes which are even partially

            adjacent to a region with style index \p 0.

  \sa       Function getBoundaryStrokes().

*/

DVAPI std::vector<int> getSelectedStrokes(</int>

	TVectorImage &vi,					 //!< Vector image whose strokes will be selected.

	const LevelSelection &levelSelection //!< Selection filter for the specified image.

	);

#endif // LEVELSELECTION_H