#ifndef DEFORMATIONSELECTOR_H
#define DEFORMATIONSELECTOR_H

#include "ext/StrokeDeformationImpl.h"

namespace ToonzExt
{
/**
   * @brief This class is a Singleton that selects the correct 
   *  StrokeDeformationImpl that will use StrokeDeformation.
   * 
   * The selection use aspect of stroke (type of corner, smoothness,
   * ...) and priority of StrokeDeformationImpl itself. 
   * Priority can manage simply some strange case (corner that 
   * seems to be straight corner and smooth corner).
   *
   * @note Selection can be overriden by user.
   * @note Private use only.
   */
class DeformationSelector
{
	typedef std::pair<StrokeDeformationImpl *, int> Deformation;
	vector<Deformation> ref_;

	DeformationSelector();
	DeformationSelector(const DeformationSelector &);
	DeformationSelector operator=(const DeformationSelector &);

public:
	~DeformationSelector();

	static DeformationSelector *
	instance();

	void
	add(StrokeDeformationImpl *deformation,
		int priority);

	StrokeDeformationImpl *
	getDeformation(const ContextStatus *status);
};
}

/**
 * @brief This macro manage the registration in internal catalog
 * of deformations.
 */
#define REGISTER(myClass, priority)                                          \
	static bool add_in_array()                                               \
	{                                                                        \
		DeformationSelector::instance()->add(myClass::instance(), priority); \
		return true;                                                         \
	}                                                                        \
	static bool done = add_in_array();

#endif /* DEFORMATIONSELECTOR_H */

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