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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Authors:
* Jabier Arraiza Cenoz
*
* Copyright (C) Jabier Arraiza Cenoz 2014 <jabier.arraiza@marker.es>
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <gtkmm.h>
#include "live_effects/lpe-show_handles.h"
#include <2geom/sbasis-to-bezier.h>
#include <2geom/svg-path-parser.h>
#include "helper/geom.h"
#include "desktop-style.h"
#include "display/curve.h"
#include "svg/svg.h"
#include "object/sp-shape.h"
#include "style.h"
// TODO due to internal breakage in glibmm headers, this must be last:
#include <glibmm/i18n.h>
namespace Inkscape {
namespace LivePathEffect {
LPEShowHandles::LPEShowHandles(LivePathEffectObject *lpeobject)
: Effect(lpeobject),
nodes(_("Show nodes"), _("Show nodes"), "nodes", &wr, this, true),
handles(_("Show handles"), _("Show handles"), "handles", &wr, this, true),
original_path(_("Show path"), _("Show path"), "original_path", &wr, this, true),
show_center_node(_("Show center of node"), _("Show center of node"), "show_center_node", &wr, this, false),
original_d(_("Show original"), _("Show original"), "original_d", &wr, this, false),
scale_nodes_and_handles(_("Scale nodes and handles"), _("Scale nodes and handles"), "scale_nodes_and_handles", &wr, this, 10)
{
registerParameter(&nodes);
registerParameter(&handles);
registerParameter(&original_path);
registerParameter(&show_center_node);
registerParameter(&original_d);
registerParameter(&scale_nodes_and_handles);
scale_nodes_and_handles.param_set_range(0, 500.);
scale_nodes_and_handles.param_set_increments(1, 1);
scale_nodes_and_handles.param_set_digits(2);
stroke_width = 1.0;
}
bool LPEShowHandles::alerts_off = false;
/**
* Sets default styles to element
* this permanently remove.some styles of the element
*/
void LPEShowHandles::doOnApply(SPLPEItem const* lpeitem)
{
if(!alerts_off) {
char *msg = _("The \"show handles\" path effect will remove any custom style on the object you are applying it to. If this is not what you want, click Cancel.");
Gtk::MessageDialog dialog(msg, false, Gtk::MESSAGE_QUESTION, Gtk::BUTTONS_OK_CANCEL, true);
gint response = dialog.run();
alerts_off = true;
if(response == GTK_RESPONSE_CANCEL) {
SPLPEItem* item = const_cast<SPLPEItem*>(lpeitem);
item->removeCurrentPathEffect(false);
return;
}
}
SPLPEItem* item = const_cast<SPLPEItem*>(lpeitem);
SPCSSAttr *css = sp_repr_css_attr_new ();
sp_repr_css_set_property (css, "stroke", "black");
sp_repr_css_set_property (css, "stroke-width", "1");
sp_repr_css_set_property (css, "stroke-linecap", "butt");
sp_repr_css_set_property(css, "fill", "none");
sp_desktop_apply_css_recursive(item, css, true);
sp_repr_css_attr_unref (css);
}
void LPEShowHandles::doBeforeEffect (SPLPEItem const* lpeitem)
{
SPItem const* item = SP_ITEM(lpeitem);
stroke_width = item->style->stroke_width.computed;
}
Geom::PathVector LPEShowHandles::doEffect_path (Geom::PathVector const & path_in)
{
Geom::PathVector path_out;
Geom::PathVector original_pathv = pathv_to_linear_and_cubic_beziers(path_in);
if(original_path) {
for (const auto & i : path_in) {
path_out.push_back(i);
}
}
if(!outline_path.empty()) {
outline_path.clear();
}
if (original_d) {
SPCurve * shape_curve = current_shape->getCurveForEdit();
if (shape_curve) {
Geom::PathVector original_curve = shape_curve->get_pathvector();
if(original_path) {
for (const auto & i : original_curve) {
path_out.push_back(i);
}
}
original_pathv.insert(original_pathv.end(), original_curve.begin(), original_curve.end());
}
generateHelperPath(original_pathv);
shape_curve->unref();
} else {
generateHelperPath(original_pathv);
}
for (const auto & i : outline_path) {
path_out.push_back(i);
}
return path_out;
}
void
LPEShowHandles::generateHelperPath(Geom::PathVector result)
{
if(!handles && !nodes) {
return;
}
Geom::CubicBezier const *cubic = nullptr;
for (auto & path_it : result) {
//Si está vacío...
if (path_it.empty()) {
continue;
}
//Itreadores
Geom::Path::iterator curve_it1 = path_it.begin(); // incoming curve
Geom::Path::iterator curve_it2 = ++(path_it.begin()); // outgoing curve
Geom::Path::iterator curve_endit = path_it.end_default(); // this determines when the loop has to stop
if (path_it.closed()) {
// if the path is closed, maybe we have to stop a bit earlier because the
// closing line segment has zerolength.
Geom::Curve const &closingline = path_it.back_closed(); // the closing line segment is always of type
// Geom::LineSegment.
if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
// closingline.isDegenerate() did not work, because it only checks for
// *exact* zero length, which goes wrong for relative coordinates and
// rounding errors...
// the closing line segment has zero-length. So stop before that one!
curve_endit = path_it.end_open();
}
}
if(nodes) {
Geom::NodeType nodetype = Geom::NODE_CUSP;
if(path_it.closed()) {
nodetype = Geom::get_nodetype(path_it.finalCurve(), *curve_it1);
}
drawNode(curve_it1->initialPoint(), nodetype);
}
while (curve_it1 != curve_endit) {
cubic = dynamic_cast<Geom::CubicBezier const *>(&*curve_it1);
if (cubic) {
if(handles) {
if(!are_near((*cubic)[0],(*cubic)[1])) {
drawHandle((*cubic)[1]);
drawHandleLine((*cubic)[0],(*cubic)[1]);
}
if(!are_near((*cubic)[3],(*cubic)[2])) {
drawHandle((*cubic)[2]);
drawHandleLine((*cubic)[3],(*cubic)[2]);
}
}
}
if(nodes && (curve_it2 != curve_endit || !path_it.closed())) {
Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
drawNode(curve_it1->finalPoint(), nodetype);
}
++curve_it1;
if(curve_it2 != curve_endit) {
++curve_it2;
}
}
}
}
void
LPEShowHandles::drawNode(Geom::Point p, Geom::NodeType nodetype)
{
if(stroke_width * scale_nodes_and_handles > 0.0) {
Geom::Rotate rotate = Geom::Rotate(0);
if ( nodetype == Geom::NODE_CUSP) {
rotate = Geom::Rotate::from_degrees(45);
}
double diameter = stroke_width * scale_nodes_and_handles;
char const * svgd;
if (show_center_node) {
svgd = "M 0.05,0 A 0.05,0.05 0 0 1 0,0.05 0.05,0.05 0 0 1 -0.05,0 0.05,0.05 0 0 1 0,-0.05 0.05,0.05 0 0 1 0.05,0 Z M -0.5,-0.5 0.5,-0.5 0.5,0.5 -0.5,0.5 Z";
} else {
svgd = "M -0.5,-0.5 0.5,-0.5 0.5,0.5 -0.5,0.5 Z";
}
Geom::PathVector pathv = sp_svg_read_pathv(svgd);
pathv *= rotate * Geom::Scale(diameter) * Geom::Translate(p);
outline_path.push_back(pathv[0]);
if (show_center_node) {
outline_path.push_back(pathv[1]);
}
}
}
void
LPEShowHandles::drawHandle(Geom::Point p)
{
if(stroke_width * scale_nodes_and_handles > 0.0) {
double diameter = stroke_width * scale_nodes_and_handles;
char const * svgd;
svgd = "M 0.7,0.35 A 0.35,0.35 0 0 1 0.35,0.7 0.35,0.35 0 0 1 0,0.35 0.35,0.35 0 0 1 0.35,0 0.35,0.35 0 0 1 0.7,0.35 Z";
Geom::PathVector pathv = sp_svg_read_pathv(svgd);
pathv *= Geom::Scale (diameter) * Geom::Translate(p - Geom::Point(diameter * 0.35,diameter * 0.35));
outline_path.push_back(pathv[0]);
}
}
void
LPEShowHandles::drawHandleLine(Geom::Point p,Geom::Point p2)
{
Geom::Path path;
double diameter = stroke_width * scale_nodes_and_handles;
if(diameter > 0.0 && Geom::distance(p,p2) > (diameter * 0.35)) {
Geom::Ray ray2(p, p2);
p2 = p2 - Geom::Point::polar(ray2.angle(),(diameter * 0.35));
}
path.start( p );
path.appendNew<Geom::LineSegment>( p2 );
outline_path.push_back(path);
}
}; //namespace LivePathEffect
}; /* namespace Inkscape */
/*
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 :
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