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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef INKSCAPE_LPE_OFFSET_H
+#define INKSCAPE_LPE_OFFSET_H
+
+/** \file
+ * LPE <offset> implementation, see lpe-offset.cpp.
+ */
+
+/*
+ * Authors:
+ * Maximilian Albert
+ * Jabiertxo Arraiza
+ *
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "live_effects/effect.h"
+#include "live_effects/lpegroupbbox.h"
+#include "live_effects/parameter/enum.h"
+#include "live_effects/parameter/parameter.h"
+#include "live_effects/parameter/unit.h"
+// this is only to flatten nonzero fillrule
+#include "livarot/Path.h"
+#include "livarot/Shape.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+namespace OfS {
+// we need a separate namespace to avoid clashes with other LPEs
+class KnotHolderEntityOffsetPoint;
+}
+
+typedef FillRule FillRuleFlatten;
+
+class LPEOffset : public Effect, GroupBBoxEffect {
+public:
+ LPEOffset(LivePathEffectObject *lpeobject);
+ ~LPEOffset() override;
+ void doBeforeEffect (SPLPEItem const* lpeitem) override;
+ void doAfterEffect(SPLPEItem const * /*lpeitem*/, SPCurve *curve) override;
+ Geom::PathVector doEffect_path (Geom::PathVector const & path_in) override;
+ bool doOnOpen(SPLPEItem const *lpeitem) override;
+ void doOnApply(SPLPEItem const* lpeitem) override;
+ void transform_multiply(Geom::Affine const &postmul, bool set) override;
+ void addKnotHolderEntities(KnotHolder * knotholder, SPItem * item) override;
+ void addCanvasIndicators(SPLPEItem const *lpeitem, std::vector<Geom::PathVector> &hp_vec) override;
+ void calculateOffset (Geom::PathVector const & path_in);
+ Geom::Path cleanupPathSelfIntersects(Geom::Path path, size_t originpos, double tolerance);
+ Geom::Point get_default_point(Geom::PathVector pathv);
+ double sp_get_offset(Geom::Point origin);
+ friend class OfS::KnotHolderEntityOffsetPoint;
+
+private:
+ UnitParam unit;
+ ScalarParam offset;
+ EnumParam<unsigned> linejoin_type;
+ ScalarParam miter_limit;
+ BoolParam attempt_force_join;
+
+ BoolParam update_on_knot_move;
+ Geom::Point offset_pt;
+ Glib::ustring prev_unit;
+ double scale = 1; //take document scale and additional parent transformations into account
+ KnotHolderEntity * _knot_entity;
+ Geom::PathVector mix_pathv_all;
+ Geom::PathVector helper_path;
+ Inkscape::UI::Widget::Scalar *offset_widget;
+ FillRuleFlatten fillrule;
+ bool liveknot;
+ bool legacytest_livarotonly = false;
+ void modified(SPObject */*obj*/, guint flags);
+ sigc::connection modified_connection;
+ LPEOffset(const LPEOffset&);
+ LPEOffset& operator=(const LPEOffset&);
+};
+
+} //namespace LivePathEffect
+} //namespace Inkscape
+
+#endif
+
+/*
+ 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 :