#include "libnr/nr-values.h"

#include "libnr/nr-point-fns.h"

#include <2geom/geom.h>

#include "line-snapper.h"

#include "snapped-line.cpp"

Inkscape::LineSnapper::LineSnapper(SPNamedView const *nv, NR::Coord const d) : Snapper(nv, d)

{

}

void Inkscape::LineSnapper::_doFreeSnap(SnappedConstraints &sc,

Inkscape::Snapper::PointType const &t,

NR::Point const &p,

bool const &f,

std::vector<NR::Point> &points_to_snap,

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

{

/* Snap along x (i.e. to vertical lines) */

_doConstrainedSnap(sc, t, p, f, points_to_snap, component_vectors[NR::X], it);

/* Snap along y (i.e. to horizontal lines) */

_doConstrainedSnap(sc, t, p, f, points_to_snap, component_vectors[NR::Y], it);

}

void Inkscape::LineSnapper::_doConstrainedSnap(SnappedConstraints &sc,

Inkscape::Snapper::PointType const &/*t*/,

NR::Point const &p,

bool const &/*f*/,

std::vector<NR::Point> &/*points_to_snap*/,

ConstraintLine const &c,

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

{

Inkscape::SnappedPoint s = SnappedPoint(p, NR_HUGE);

/* Get the lines that we will try to snap to */

const LineList lines = _getSnapLines(p);

for (LineList::const_iterator i = lines.begin(); i != lines.end(); i++) {

/* Normal to the line we're trying to snap along */

NR::Point const n(NR::rot90(NR::unit_vector(c.getDirection())));

NR::Point const point_on_line = c.hasPoint() ? c.getPoint() : p;

/* Constant term of the line we're trying to snap along */

NR::Coord const q = dot(n, point_on_line);

/* Try to intersect this line with the target line */

Geom::Point t_2geom(NR_HUGE, NR_HUGE);

Geom::IntersectorKind const k = Geom::line_intersection(n.to_2geom(), q, component_vectors[i->first].to_2geom(), i->second, t_2geom);

NR::Point t(t_2geom);

if (k == Geom::intersects) {

const NR::Coord dist = L2(t - p);

//Store any line that's within snapping range

if (dist < getDistance()) {

_addSnappedLine(sc, t, dist, c.getDirection(), t);

//SnappedLine dummy = SnappedLine(t, dist, c.getDirection(), t);

//sc.infinite_lines.push_back(dummy);

}

}

}

}