Adding upstream version 1.2.2.upstream/1.2.2upstream

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

1 files changed, 226 insertions, 0 deletions

diff --git a/src/live_effects/lpe-attach-path.cpp b/src/live_effects/lpe-attach-path.cpp
new file mode 100644
index 0000000..a6b4b03
--- /dev/null
+++ b/src/live_effects/lpe-attach-path.cpp
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Theodore Janeczko 2012 <flutterguy317@gmail.com>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cmath>
+#include "live_effects/lpe-attach-path.h"
+#include "display/curve.h"
+#include "2geom/path-sink.h"
+// TODO due to internal breakage in glibmm headers, this must be last:
+#include <glibmm/i18n.h>
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+LPEAttachPath::LPEAttachPath(LivePathEffectObject *lpeobject) :
+    Effect(lpeobject),
+    start_path(_("Start path:"), _("Path to attach to the start of this path"), "startpath", &wr, this),
+    start_path_position(_("Start path position:"), _("Position to attach path start to"), "startposition", &wr, this, 0.0),
+    start_path_curve_start(_("Start path curve start:"), _("Starting curve"), "startcurvestart", &wr, this, Geom::Point(20,0)/*, true*/),
+    start_path_curve_end(_("Start path curve end:"), _("Ending curve"), "startcurveend", &wr, this, Geom::Point(20,0)/*, true*/),
+    end_path(_("End path:"), _("Path to attach to the end of this path"), "endpath", &wr, this),
+    end_path_position(_("End path position:"), _("Position to attach path end to"), "endposition", &wr, this, 0.0),
+    end_path_curve_start(_("End path curve start:"), _("Starting curve"), "endcurvestart", &wr, this, Geom::Point(20,0)/*, true*/),
+    end_path_curve_end(_("End path curve end:"), _("Ending curve"), "endcurveend", &wr, this, Geom::Point(20,0)/*, true*/)
+{
+    registerParameter(&start_path);
+    registerParameter(&start_path_position);
+    registerParameter(&start_path_curve_start);
+    registerParameter(&start_path_curve_end);
+    
+    registerParameter(&end_path);
+    registerParameter(&end_path_position);
+    registerParameter(&end_path_curve_start);
+    registerParameter(&end_path_curve_end);
+
+    //perceived_path = true;
+    show_orig_path = true;
+    curve_start_previous_origin = start_path_curve_end.getOrigin();
+    curve_end_previous_origin = end_path_curve_end.getOrigin();
+    start_path.setUpdating(true);
+    end_path.setUpdating(true);
+}
+
+LPEAttachPath::~LPEAttachPath()
+= default;
+
+void LPEAttachPath::resetDefaults(SPItem const * /*item*/)
+{
+    curve_start_previous_origin = start_path_curve_end.getOrigin();
+    curve_end_previous_origin = end_path_curve_end.getOrigin();
+}
+
+void 
+LPEAttachPath::doBeforeEffect (SPLPEItem const* lpeitem)
+{
+    if (is_load) {
+        start_path.setUpdating(false);
+        start_path.start_listening(start_path.getObject());
+        start_path.connect_selection_changed();
+        end_path.setUpdating(false);
+        end_path.start_listening(end_path.getObject());
+        end_path.connect_selection_changed();
+        SPItem * item = nullptr;
+        if (( item = dynamic_cast<SPItem *>(end_path.getObject()) )) {
+            item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+        }
+        if (( item = dynamic_cast<SPItem *>(start_path.getObject()) )) {
+            item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+        }
+    }
+}
+
+
+bool 
+LPEAttachPath::doOnOpen(SPLPEItem const *lpeitem)
+{
+    if (!is_load || is_applied) {
+        return false;
+    }
+    start_path.setUpdating(false);
+    start_path.start_listening(start_path.getObject());
+    start_path.connect_selection_changed();
+    end_path.setUpdating(false);
+    end_path.start_listening(end_path.getObject());
+    end_path.connect_selection_changed();
+    return false;
+}
+
+void LPEAttachPath::doEffect (SPCurve * curve)
+{
+    Geom::PathVector this_pathv = curve->get_pathvector();
+    if (sp_lpe_item && !this_pathv.empty()) {
+        Geom::Path p = Geom::Path(this_pathv.front().initialPoint());
+        
+        bool set_start_end = start_path_curve_end.getOrigin() != curve_start_previous_origin;
+        bool set_end_end = end_path_curve_end.getOrigin() != curve_end_previous_origin;
+        
+        if (start_path.linksToPath() && start_path.getObject()) {
+
+            Geom::PathVector linked_pathv = start_path.get_pathvector();
+            Geom::Affine linkedtransform = start_path.getObject()->getRelativeTransform(sp_lpe_item);
+
+            if ( !linked_pathv.empty() )
+            {
+                Geom::Path transformedpath = linked_pathv.front() * linkedtransform;
+                start_path_curve_start.setOrigin(this_pathv.front().initialPoint());
+
+                std::vector<Geom::Point> derivs = this_pathv.front().front().pointAndDerivatives(0, 3);
+                
+                for (unsigned deriv_n = 1; deriv_n < derivs.size(); deriv_n++) {
+                    Geom::Coord length = derivs[deriv_n].length();
+                    if ( ! Geom::are_near(length, 0) && !start_path.getObject()->_successor) {
+                        if (set_start_end) {
+                            start_path_position.param_set_value(transformedpath.nearestTime(start_path_curve_end.getOrigin()).asFlatTime());
+                        }
+                        if (start_path_position > transformedpath.size()) {
+                            start_path_position.param_set_value(transformedpath.size());
+                        } else if (start_path_position < 0) {
+                            start_path_position.param_set_value(0);
+                        }
+                        Geom::Curve const *c = start_path_position >= transformedpath.size() ?
+							&transformedpath.back() : &transformedpath.at((int)start_path_position);
+
+                        std::vector<Geom::Point> derivs_2 = c->pointAndDerivatives(start_path_position >= transformedpath.size() ? 1 : (start_path_position - (int)start_path_position), 3);
+                        for (unsigned deriv_n_2 = 1; deriv_n_2 < derivs_2.size(); deriv_n_2++) {
+                            Geom::Coord length_2 = derivs[deriv_n_2].length();
+                            if ( ! Geom::are_near(length_2, 0) ) {
+                                start_path_curve_end.setOrigin(derivs_2[0]);
+                                curve_start_previous_origin = start_path_curve_end.getOrigin();
+
+                                double startangle = atan2(start_path_curve_start.getVector().y(), start_path_curve_start.getVector().x());
+                                double endangle = atan2(start_path_curve_end.getVector().y(), start_path_curve_end.getVector().x());
+                                double startderiv = atan2(derivs[deriv_n].y(), derivs[deriv_n].x());
+                                double endderiv = atan2(derivs_2[deriv_n_2].y(), derivs_2[deriv_n_2].x());
+                                Geom::Point pt1 = Geom::Point(start_path_curve_start.getVector().length() * cos(startangle + startderiv), start_path_curve_start.getVector().length() * sin(startangle + startderiv));
+                                Geom::Point pt2 = Geom::Point(start_path_curve_end.getVector().length() * cos(endangle + endderiv), start_path_curve_end.getVector().length() * sin(endangle + endderiv));
+                                p = Geom::Path(derivs_2[0]);
+                                p.appendNew<Geom::CubicBezier>(-pt2 + derivs_2[0], -pt1 + this_pathv.front().initialPoint(), this_pathv.front().initialPoint());
+                                break;
+
+                            }
+                        }
+                        break;
+                    }
+                }
+            }
+        }
+        
+        p.append(this_pathv.front());
+        
+        if (end_path.linksToPath() && end_path.getObject()) {
+
+            Geom::PathVector linked_pathv = end_path.get_pathvector();
+            Geom::Affine linkedtransform = end_path.getObject()->getRelativeTransform(sp_lpe_item);
+
+            if ( !linked_pathv.empty() )
+            {
+                Geom::Path transformedpath = linked_pathv.front() * linkedtransform;
+                Geom::Curve * last_seg_reverse = this_pathv.front().back().reverse();
+                
+                end_path_curve_start.setOrigin(last_seg_reverse->initialPoint());
+
+                std::vector<Geom::Point> derivs = last_seg_reverse->pointAndDerivatives(0, 3);
+                for (unsigned deriv_n = 1; deriv_n < derivs.size(); deriv_n++) {
+                    Geom::Coord length = derivs[deriv_n].length();
+                    if ( ! Geom::are_near(length, 0) && !end_path.getObject()->_successor) {
+                        if (set_end_end) {
+                            end_path_position.param_set_value(transformedpath.nearestTime(end_path_curve_end.getOrigin()).asFlatTime());
+                        }
+                        
+                        if (end_path_position > transformedpath.size()) {
+                            end_path_position.param_set_value(transformedpath.size());
+                        } else if (end_path_position < 0) {
+                            end_path_position.param_set_value(0);
+                        }
+                        const Geom::Curve *c = end_path_position >= transformedpath.size() ?
+							&transformedpath.back() : &transformedpath.at((int)end_path_position);
+
+                        std::vector<Geom::Point> derivs_2 = c->pointAndDerivatives(end_path_position >= transformedpath.size() ? 1 : (end_path_position - (int)end_path_position), 3);
+                        for (unsigned deriv_n_2 = 1; deriv_n_2 < derivs_2.size(); deriv_n_2++) {
+                            Geom::Coord length_2 = derivs[deriv_n_2].length();
+                            if ( ! Geom::are_near(length_2, 0) ) {
+                                
+                                end_path_curve_end.setOrigin(derivs_2[0]);
+                                curve_end_previous_origin = end_path_curve_end.getOrigin();
+                                
+                                double startangle = atan2(end_path_curve_start.getVector().y(), end_path_curve_start.getVector().x());
+                                double endangle = atan2(end_path_curve_end.getVector().y(), end_path_curve_end.getVector().x());
+                                double startderiv = atan2(derivs[deriv_n].y(), derivs[deriv_n].x());
+                                double endderiv = atan2(derivs_2[deriv_n_2].y(), derivs_2[deriv_n_2].x());
+                                Geom::Point pt1 = Geom::Point(end_path_curve_start.getVector().length() * cos(startangle + startderiv), end_path_curve_start.getVector().length() * sin(startangle + startderiv));
+                                Geom::Point pt2 = Geom::Point(end_path_curve_end.getVector().length() * cos(endangle + endderiv), end_path_curve_end.getVector().length() * sin(endangle + endderiv));
+                                p.appendNew<Geom::CubicBezier>(-pt1 + this_pathv.front().finalPoint(), -pt2 + derivs_2[0], derivs_2[0]);
+
+                                break;
+
+                            }
+                        }
+                        break;
+                    }
+                }
+                delete last_seg_reverse;
+            }
+        }
+        Geom::PathVector outvector;
+        outvector.push_back(p);
+        curve->set_pathvector(outvector);
+    }
+}
+
+} // 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 :