#ifndef SEEN_SNAP_H

#define SEEN_SNAP_H

#include <vector>

#include <libnr/nr-coord.h>

#include <libnr/nr-dim2.h>

#include <libnr/nr-forward.h>

#include <libnr/nr-scale.h>

#include "grid-snapper.h"

#include "guide-snapper.h"

#include "object-snapper.h"

class SPNamedView;

class SnapManager

{

public:

SnapManager(SPNamedView const *v);

bool willSnapSomething() const;

Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,

NR::Point const &p,

SPItem const *it) const;

Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,

NR::Point const &p,

std::list<SPItem const *> const &it) const;

Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,

NR::Point const &p,

Inkscape::Snapper::ConstraintLine const &c,

SPItem const *it) const;

Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,

NR::Point const &p,

Inkscape::Snapper::ConstraintLine const &c,

std::list<SPItem const *> const &it) const;

std::pair<NR::Point, bool> freeSnapTranslation(Inkscape::Snapper::PointType t,

std::vector<NR::Point> const &p,

std::list<SPItem const *> const &it,

NR::Point const &tr) const;

std::pair<NR::Point, bool> constrainedSnapTranslation(Inkscape::Snapper::PointType t,

std::vector<NR::Point> const &p,

std::list<SPItem const *> const &it,

Inkscape::Snapper::ConstraintLine const &c,

NR::Point const &tr) const;

std::pair<NR::scale, bool> freeSnapScale(Inkscape::Snapper::PointType t,

std::vector<NR::Point> const &p,

std::list<SPItem const *> const &it,

NR::scale const &s,

NR::Point const &o) const;

std::pair<NR::scale, bool> constrainedSnapScale(Inkscape::Snapper::PointType t,

std::vector<NR::Point> const &p,

std::list<SPItem const *> const &it,

Inkscape::Snapper::ConstraintLine const &c,

NR::scale const &s,

NR::Point const &o) const;

std::pair<NR::Coord, bool> freeSnapStretch(Inkscape::Snapper::PointType t,

std::vector<NR::Point> const &p,

std::list<SPItem const *> const &it,

NR::Coord const &s,

NR::Point const &o,

NR::Dim2 d,

bool uniform) const;

std::pair<NR::Coord, bool> freeSnapSkew(Inkscape::Snapper::PointType t,

std::vector<NR::Point> const &p,

std::list<SPItem const *> const &it,

NR::Coord const &s,

NR::Point const &o,

NR::Dim2 d) const;

Inkscape::GridSnapper grid;

Inkscape::GuideSnapper guide;

Inkscape::ObjectSnapper object;

typedef std::list<const Inkscape::Snapper*> SnapperList;

SnapperList getSnappers() const;

private:

enum Transformation {

TRANSLATION,

SCALE,

STRETCH,

SKEW

};

std::pair<NR::Point, bool> _snapTransformed(Inkscape::Snapper::PointType type,

std::vector<NR::Point> const &points,

std::list<SPItem const *> const &ignore,

bool constrained,

Inkscape::Snapper::ConstraintLine const &constraint,

Transformation transformation_type,

NR::Point const &transformation,

NR::Point const &origin,

NR::Dim2 dim,

bool uniform) const;

};

#endif /* !SEEN_SNAP_H */