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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* Authors:
* Parth Pant <parthpant4@gmail.com>
*
* Copyright (C) 2021 Authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_ALIGNMENT_SNAPPER_H
#define SEEN_ALIGNMENT_SNAPPER_H
#include <2geom/affine.h>
#include <memory>
#include "snap-enums.h"
#include "snapper.h"
#include "snap-candidate.h"
class SPDesktop;
class SPNamedView;
class SPObject;
class SPPath;
class SPDesktop;
namespace Inkscape
{
/**
* Snapping things to on-canvas alignment guides
*/
class AlignmentSnapper : public Snapper
{
public:
AlignmentSnapper(SnapManager *sm, Geom::Coord const d);
~AlignmentSnapper() override;
/**
* @return true if this Snapper will snap at least one kind of point.
*/
bool ThisSnapperMightSnap() const override;
/**
* @return Snap tolerance (desktop coordinates); depends on current zoom so that it's always the same in screen pixels.
*/
Geom::Coord getSnapperTolerance() const override; //returns the tolerance of the snapper in screen pixels (i.e. independent of zoom)
bool getSnapperAlwaysSnap() const override; //if true, then the snapper will always snap, regardless of its tolerance
void freeSnap(IntermSnapResults &isr,
Inkscape::SnapCandidatePoint const &p,
Geom::OptRect const &bbox_to_snap,
std::vector<SPObject const *> const *it,
std::vector<SnapCandidatePoint> *unselected_nodes) const override;
void constrainedSnap(IntermSnapResults &isr,
Inkscape::SnapCandidatePoint const &p,
Geom::OptRect const &bbox_to_snap,
SnapConstraint const &c,
std::vector<SPObject const *> const *it,
std::vector<SnapCandidatePoint> *unselected_nodes) const override;
private:
std::unique_ptr<std::vector<SnapCandidatePoint>> _points_to_snap_to;
/** Collects and caches points on bounding boxes of the candidates
* @param is the point first point in the selection?
*/
void _collectBBoxPoints(bool const &first_point) const;
void _snapBBoxPoints(IntermSnapResults &isr,
SnapCandidatePoint const &p,
std::vector<SnapCandidatePoint> *unselected_nodes,
SnapConstraint const &c = SnapConstraint(),
Geom::Point const &p_proj_on_constraint = Geom::Point()) const;
SnapSourceType source2alignment(SnapSourceType s) const;
bool _allowSourceToSnapToTarget(SnapSourceType source, SnapTargetType target, bool strict_snapping) const;
}; // end of AlignmentSnapper class
} // end of namespace Inkscape
#endif
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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