Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 247 insertions, 0 deletions

diff --git a/src/live_effects/lpe-show_handles.cpp b/src/live_effects/lpe-show_handles.cpp
new file mode 100644
index 0000000..cc6e36c
--- /dev/null
+++ b/src/live_effects/lpe-show_handles.cpp
@@ -0,0 +1,247 @@
+// 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)
+{
+    stroke_width = lpeitem->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) {
+        auto shape_curve = SPCurve::copy(current_shape->curveForEdit());
+        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);
+    } 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 :