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diff --git a/src/live_effects/lpe-mirror_symmetry.h b/src/live_effects/lpe-mirror_symmetry.h
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+++ b/src/live_effects/lpe-mirror_symmetry.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef INKSCAPE_LPE_MIRROR_SYMMETRY_H
+#define INKSCAPE_LPE_MIRROR_SYMMETRY_H
+
+/** \file
+ * LPE <mirror_symmetry> implementation: mirrors a path with respect to a given line.
+ */
+/*
+ * Authors:
+ *   Maximilian Albert
+ *   Johan Engelen
+ *   Jabiertxof
+ *
+ * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
+ * Copyright (C) Maximilin 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/lpeobject-reference.h"
+#include "live_effects/lpeobject.h"
+#include "live_effects/parameter/enum.h"
+#include "live_effects/parameter/parameter.h"
+#include "live_effects/parameter/point.h"
+#include "live_effects/parameter/satellitearray.h"
+#include "live_effects/parameter/text.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+enum ModeType {
+    MT_V,
+    MT_H,
+    MT_FREE,
+    MT_X,
+    MT_Y,
+    MT_END
+};
+
+class LPEMirrorSymmetry : public Effect, GroupBBoxEffect {
+public:
+    LPEMirrorSymmetry(LivePathEffectObject *lpeobject);
+    ~LPEMirrorSymmetry() override;
+    void doOnApply (SPLPEItem const* lpeitem) override;
+    void doBeforeEffect (SPLPEItem const* lpeitem) override;
+    void doAfterEffect (SPLPEItem const* lpeitem, SPCurve *curve) override;
+    bool doOnOpen(SPLPEItem const * /*lpeitem*/) override;
+    Geom::PathVector doEffect_path (Geom::PathVector const & path_in) override;
+    void doOnRemove (SPLPEItem const* /*lpeitem*/) override;
+    void doOnVisibilityToggled(SPLPEItem const* /*lpeitem*/) override;
+    Gtk::Widget * newWidget() override;
+    void cloneStyle(SPObject *orig, SPObject *dest);
+    void toMirror(Geom::Affine transform);
+    void cloneD(SPObject *orig, SPObject *dest);
+    Inkscape::XML::Node * createPathBase(SPObject *elemref);
+    void centerVert();
+    void centerHoriz();
+    BoolParam split_items;
+
+protected:
+    void addCanvasIndicators(SPLPEItem const *lpeitem, std::vector<Geom::PathVector> &hp_vec) override;
+
+private:
+    SatelliteArrayParam lpesatellites;
+    EnumParam<ModeType> mode;
+    BoolParam discard_orig_path;
+    BoolParam fuse_paths;
+    BoolParam oposite_fuse;
+    BoolParam split_open;
+    BoolParam link_styles;
+    PointParam start_point;
+    PointParam end_point;
+    PointParam center_point;
+    Geom::Point previous_center;
+    SPObject *container;
+    bool reset;
+    bool prev_split = false;
+    bool prev_discard_orig_path = false;
+    bool center_vert;
+    bool center_horiz;
+    LPEMirrorSymmetry(const LPEMirrorSymmetry&) = delete;
+    LPEMirrorSymmetry& operator=(const LPEMirrorSymmetry&) = delete;
+};
+
+} //namespace LivePathEffect
+} //namespace Inkscape
+
+#endif