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diff --git a/src/ui/tool/control-point-selection.h b/src/ui/tool/control-point-selection.h
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+++ b/src/ui/tool/control-point-selection.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Control point selection - stores a set of control points and applies transformations
+ * to them
+ */
+/* Authors:
+ *   Krzysztof Kosiński <tweenk.pl@gmail.com>
+ *
+ * Copyright (C) 2009 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_UI_TOOL_CONTROL_POINT_SELECTION_H
+#define SEEN_UI_TOOL_CONTROL_POINT_SELECTION_H
+
+#include <list>
+#include <memory>
+#include <unordered_map>
+#include <unordered_set>
+#include <optional>
+#include <cstddef>
+#include <sigc++/sigc++.h>
+#include <2geom/forward.h>
+#include <2geom/point.h>
+#include <2geom/rect.h>
+#include "ui/tool/commit-events.h"
+#include "ui/tool/manipulator.h"
+#include "ui/tool/node-types.h"
+#include "snap-candidate.h"
+
+class SPDesktop;
+
+namespace Inkscape {
+class CanvasItemGroup;
+namespace UI {
+class TransformHandleSet;
+class SelectableControlPoint;
+}
+}
+
+namespace Inkscape {
+namespace UI {
+
+class ControlPointSelection : public Manipulator, public sigc::trackable {
+public:
+    ControlPointSelection(SPDesktop *d, Inkscape::CanvasItemGroup *th_group);
+    ~ControlPointSelection() override;
+    typedef std::unordered_set<SelectableControlPoint *> set_type;
+    typedef set_type Set; // convenience alias
+
+    typedef set_type::iterator iterator;
+    typedef set_type::const_iterator const_iterator;
+    typedef set_type::size_type size_type;
+    typedef SelectableControlPoint *value_type;
+    typedef SelectableControlPoint *key_type;
+
+    // size
+    bool empty() { return _points.empty(); }
+    size_type size() { return _points.size(); }
+
+    // iterators
+    iterator begin() { return _points.begin(); }
+    const_iterator begin() const { return _points.begin(); }
+    iterator end() { return _points.end(); }
+    const_iterator end() const { return _points.end(); }
+
+    // insert
+    std::pair<iterator, bool> insert(const value_type& x, bool notify = true, bool to_update = true);
+    template <class InputIterator>
+    void insert(InputIterator first, InputIterator last) {
+        for (; first != last; ++first) {
+            insert(*first, false, false);
+        }
+        _update();
+        signal_selection_changed.emit(std::vector<key_type>(first, last), true);
+    }
+
+    // erase
+    void clear();
+    void erase(iterator pos, bool to_update = true);
+    size_type erase(const key_type& k, bool notify = true);
+    void erase(iterator first, iterator last);
+
+    // find
+    iterator find(const key_type &k) {
+        return _points.find(k);
+    }
+
+    // Sometimes it is very useful to keep a list of all selectable points.
+    set_type const &allPoints() const { return _all_points; }
+    set_type &allPoints() { return _all_points; }
+    // ...for example in these methods. Another useful case is snapping.
+    void selectAll();
+    void selectArea(Geom::Rect const &, bool invert = false);
+    void invertSelection();
+    void spatialGrow(SelectableControlPoint *origin, int dir);
+
+    bool event(Inkscape::UI::Tools::ToolBase *, GdkEvent *) override;
+
+    void transform(Geom::Affine const &m);
+    void align(Geom::Dim2 d, AlignTargetNode target = AlignTargetNode::MID_NODE);
+    void distribute(Geom::Dim2 d);
+
+    Geom::OptRect pointwiseBounds();
+    Geom::OptRect bounds();
+
+    bool transformHandlesEnabled() { return _handles_visible; }
+    void showTransformHandles(bool v, bool one_node);
+    // the two methods below do not modify the state; they are for use in manipulators
+    // that need to temporarily hide the handles, for example when moving a node
+    void hideTransformHandles();
+    void restoreTransformHandles();
+    void toggleTransformHandlesMode();
+
+    sigc::signal<void> signal_update;
+    // It turns out that emitting a signal after every point is selected or deselected is not too efficient,
+    // so this can be done in a massive group once the selection is finally changed.
+    sigc::signal<void, std::vector<SelectableControlPoint *>, bool> signal_selection_changed;
+    sigc::signal<void, CommitEvent> signal_commit;
+
+    void getOriginalPoints(std::vector<Inkscape::SnapCandidatePoint> &pts);
+    void getUnselectedPoints(std::vector<Inkscape::SnapCandidatePoint> &pts);
+    void setOriginalPoints();
+    //the purpose of this list is to keep track of first and last selected
+    std::list<SelectableControlPoint *> _points_list;
+
+private:
+    // The functions below are invoked from SelectableControlPoint.
+    // Previously they were connected to handlers when selecting, but this
+    // creates problems when dragging a point that was not selected.
+    void _pointGrabbed(SelectableControlPoint *);
+    void _pointDragged(Geom::Point &, GdkEventMotion *);
+    void _pointUngrabbed();
+    bool _pointClicked(SelectableControlPoint *, GdkEventButton *);
+    void _mouseoverChanged();
+
+    void _update();
+    void _updateTransformHandles(bool preserve_center);
+    void _updateBounds();
+    bool _keyboardMove(GdkEventKey const &, Geom::Point const &);
+    bool _keyboardRotate(GdkEventKey const &, int);
+    bool _keyboardScale(GdkEventKey const &, int);
+    bool _keyboardFlip(Geom::Dim2);
+    void _keyboardTransform(Geom::Affine const &);
+    void _commitHandlesTransform(CommitEvent ce);
+    double _rotationRadius(Geom::Point const &);
+
+    set_type _points;
+
+    set_type _all_points;
+    std::unordered_map<SelectableControlPoint *, Geom::Point> _original_positions;
+    std::unordered_map<SelectableControlPoint *, Geom::Affine> _last_trans;
+    std::optional<double> _rot_radius;
+    std::optional<double> _mouseover_rot_radius;
+    Geom::OptRect _bounds;
+    TransformHandleSet *_handles;
+    SelectableControlPoint *_grabbed_point, *_farthest_point;
+    unsigned _dragging         : 1;
+    unsigned _handles_visible  : 1;
+    unsigned _one_node_handles : 1;
+
+    friend class SelectableControlPoint;
+};
+
+} // namespace UI
+} // 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:fileencoding=utf-8 :