#include <glibmm/i18n.h>

#include <gdk/gdk.h>

#include "live_effects/lpe-copy_rotate.h"

#include "sp-shape.h"

#include "display/curve.h"

#include <2geom/path.h>

#include <2geom/path-intersection.h>

#include <2geom/sbasis-to-bezier.h>

#include <2geom/path.h>

#include <2geom/transforms.h>

#include <2geom/d2-sbasis.h>

#include <2geom/angle.h>

#include <cmath>

#include "knot-holder-entity.h"

#include "knotholder.h"

namespace Inkscape {

namespace LivePathEffect {

namespace CR {

class KnotHolderEntityStartingAngle : public LPEKnotHolderEntity {

public:

KnotHolderEntityStartingAngle(LPECopyRotate *effect) : LPEKnotHolderEntity(effect) {};

virtual void knot_set(Geom::Point const &p, Geom::Point const &origin, guint state);

virtual Geom::Point knot_get() const;

};

} // namespace CR

LPECopyRotate::LPECopyRotate(LivePathEffectObject *lpeobject) :

Effect(lpeobject),

starting_angle(_("Starting:"), _("Angle of the first copy"), "starting_angle", &wr, this, 0.0),

rotation_angle(_("Rotation angle:"), _("Angle between two successive copies"), "rotation_angle", &wr, this, 30.0),

num_copies(_("Number of copies:"), _("Number of copies of the original path"), "num_copies", &wr, this, 5),

copiesTo360(_("360º Copies"), _("No rotation angle, fixed to 360º"), "copiesTo360", &wr, this, true),

fusionPaths(_("Fusioned paths"), _("Fusion paths"), "fusionPaths", &wr, this, true),

origin(_("Origin"), _("Origin of the rotation"), "origin", &wr, this, "Adjust the origin of the rotation"),

dist_angle_handle(100)

{

show_orig_path = true;

_provides_knotholder_entities = true;

// register all your parameters here, so Inkscape knows which parameters this effect has:

registerParameter( dynamic_cast<Parameter *>(&copiesTo360) );

registerParameter( dynamic_cast<Parameter *>(&fusionPaths) );

registerParameter( dynamic_cast<Parameter *>(&starting_angle) );

registerParameter( dynamic_cast<Parameter *>(&rotation_angle) );

registerParameter( dynamic_cast<Parameter *>(&num_copies) );

registerParameter( dynamic_cast<Parameter *>(&origin) );

num_copies.param_make_integer(true);

num_copies.param_set_range(0, 1000);

}

LPECopyRotate::~LPECopyRotate()

{

}

LPECopyRotate::doOnApply(SPLPEItem const* lpeitem)

{

using namespace Geom;

original_bbox(lpeitem);

Point A(boundingbox_X.min(), boundingbox_Y.middle());

Point B(boundingbox_X.max(), boundingbox_Y.middle());

Point C(boundingbox_X.middle(), boundingbox_Y.middle());

origin.param_setValue(A);

dir = unit_vector(B - A);

dist_angle_handle = L2(B - A);

}

Geom::Piecewise<Geom::D2<Geom::SBasis> >

LPECopyRotate::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)

{

using namespace Geom;

// I first suspected the minus sign to be a bug in 2geom but it is

// likely due to SVG's choice of coordinate system orientation (max)

start_pos = origin + dir * Rotate(-deg_to_rad(starting_angle)) * dist_angle_handle;

double rotation_angle_end = rotation_angle;

if(copiesTo360){

rotation_angle_end = 360.0/(double)num_copies;

}

rot_pos = origin + dir * Rotate(-deg_to_rad(starting_angle + rotation_angle_end)) * dist_angle_handle;

A = pwd2_in.firstValue();

B = pwd2_in.lastValue();

dir = unit_vector(B - A);

Piecewise<D2<SBasis> > output;

Affine pre = Translate(-origin) * Rotate(-deg_to_rad(starting_angle));

if(fusionPaths){

// I first suspected the minus sign to be a bug in 2geom but it is

// likely due to SVG's choice of coordinate system orientation (max)

std::vector<Geom::Path> path_out;

PathVector const original_pathv = path_from_piecewise(remove_short_cuts(pwd2_in * t, 0.1), 0.001);

for (Geom::PathVector::const_iterator path_it = original_pathv.begin(); path_it != original_pathv.end(); ++path_it) {

if (path_it->empty()){

continue;

}

bool end_open = false;

std::vector<Geom::Path> temp_path;

double timeStart = 0.0;

int position = 0;

if (path_it->closed()) {

const Geom::Curve &closingline = path_it->back_closed();

if (!are_near(closingline.initialPoint(), closingline.finalPoint())) {

end_open = true;

}

}

Geom::Path original = (Geom::Path)(*path_it);

if(end_open && path_it2->closed()){

original.close(false);

original.appendNew<Geom::LineSegment>( original.initialPoint() );

original.close(true);

}

//for (int i = 0; i < num_copies; ++i) {

double rotAngle = -deg_to_rad(rotation_angle_end-starting_angle);

Rotate rot(rotAngle * i);

Affine t = pre * rot * Translate(origin);

Geom::Point lineEnd(0,0);

lineEnd[Geom::X] = cos((rotAngle * i) - rotAngle/2.0) * 100000.0;

lineEnd[Geom::Y] = sin((rotAngle * i) - rotAngle/2.0) * 100000.0;

Geom::Path kline;

kline.start((Geom::Point)origin);

kline.appendNew<Geom::LineSegment>(lineEnd);

Geom::Crossings cs = crossings(original, kline);

for(unsigned int i = 0; i < cs.size(); i++) {

double timeEnd = cs[i].ta;

Geom::Path portion = original.portion(timeStart, timeEnd);

Geom::Point middle = portion.pointAt((double)portion.size()/2.0);

position = pointSideOfLine((Geom::Point)origin, lineEnd, middle);

if(reverseFusion){

position *= -1;

}

if(position == 1){

for (int i = 0; i < num_copies; ++i) {

double rotAngle = -deg_to_rad(rotation_angle_end-starting_angle);

Rotate rot(rotAngle * i);

Affine t = pre * rot * Translate(origin);

Geom::Path kaleidoscope = portion * t;

mirror.setInitial(portion.finalPoint());

portion.append(mirror);

}

if(i!=0){

portion.setFinal(portion.initialPoint());

portion.close();

}

temp_path.push_back(portion);

}

portion.clear();

timeStart = timeEnd;

}

position = pointSideOfLine((Geom::Point)origin, lineEnd, original.finalPoint());

if(reverseFusion){

position *= -1;

}

if(cs.size()!=0 && position == 1){

for (int i = 0; i < num_copies; ++i) {

double rotAngle = -deg_to_rad(rotation_angle_end-starting_angle);

Rotate rot(rotAngle * i);

Affine t = pre * rot * Translate(origin);

Geom::Path portion = original.portion(timeStart, original.size());

Geom::Path kaleidoscope = portion * t;

kaleidoscope.setInitial(portion.finalPoint());

portion.append(kaleidoscope);

}

if (!original.closed()){

temp_path.push_back(portion);

} else {

if(cs.size() >1 ){

portion.setFinal(temp_path[0].initialPoint());

portion.setInitial(temp_path[0].finalPoint());

temp_path[0].append(portion);

} else {

temp_path.push_back(portion);

}

temp_path[0].close();

}

portion.clear();

}

}

if(cs.size() == 0 && position == 1){

for (int i = 0; i < num_copies; ++i) {

// I first suspected the minus sign to be a bug in 2geom but it is

// likely due to SVG's choice of coordinate system orientation (max)

Rotate rot(-deg_to_rad(rotation_angle_end * i));

Affine t = pre * rot * Translate(origin);

temp_path.push_back((Geom::Path)(*path_it) * t);

}

}

path_out.insert(path_out.end(), temp_path.begin(), temp_path.end());

temp_path.clear();

if(path_out.size() > 0){

output.concat(paths_to_pw(path_out));

}

} else {

for (int i = 0; i < num_copies; ++i) {

// I first suspected the minus sign to be a bug in 2geom but it is

// likely due to SVG's choice of coordinate system orientation (max)

Rotate rot(-deg_to_rad(rotation_angle_end * i));

Affine t = pre * rot * Translate(origin);

output.concat(pwd2_in * t);

}

}

return output;

}

LPECopyRotate::addCanvasIndicators(SPLPEItem const */*lpeitem*/, std::vector<Geom::PathVector> &hp_vec)

{

using namespace Geom;

Path path(start_pos);

path.appendNew<LineSegment>((Geom::Point) origin);

path.appendNew<LineSegment>(rot_pos);

PathVector pathv;

pathv.push_back(path);

hp_vec.push_back(pathv);

}

void LPECopyRotate::addKnotHolderEntities(KnotHolder *knotholder, SPDesktop *desktop, SPItem *item) {

{

KnotHolderEntity *e = new CR::KnotHolderEntityStartingAngle(this);

e->create( desktop, item, knotholder, Inkscape::CTRL_TYPE_UNKNOWN,

_("Adjust the starting angle") );

knotholder->add(e);

}

};

namespace CR {

using namespace Geom;

KnotHolderEntityStartingAngle::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)

{

LPECopyRotate* lpe = dynamic_cast<LPECopyRotate *>(_effect);

Geom::Point const s = snap_knot_position(p, state);

// I first suspected the minus sign to be a bug in 2geom but it is

// likely due to SVG's choice of coordinate system orientation (max)

lpe->starting_angle.param_set_value(rad_to_deg(-angle_between(lpe->dir, s - lpe->origin)));

if (state & GDK_SHIFT_MASK) {

lpe->dist_angle_handle = L2(lpe->B - lpe->A);

} else {

lpe->dist_angle_handle = L2(p - lpe->origin);

}

// FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.

sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), false, true);

}

Geom::Point

KnotHolderEntityStartingAngle::knot_get() const

{

LPECopyRotate const *lpe = dynamic_cast<LPECopyRotate const*>(_effect);

return lpe->start_pos;

}

} // namespace CR

} //namespace LivePathEffect

} /* namespace Inkscape */