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diff --git a/src/ui/tools/eraser-tool.h b/src/ui/tools/eraser-tool.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef ERASER_TOOL_H_SEEN
+#define ERASER_TOOL_H_SEEN
+
+/*
+ * Handwriting-like drawing mode
+ *
+ * Authors:
+ * Mitsuru Oka <oka326@parkcity.ne.jp>
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * The original dynadraw code:
+ * Paul Haeberli <paul@sgi.com>
+ *
+ * Copyright (C) 1998 The Free Software Foundation
+ * Copyright (C) 1999-2002 authors
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ * Copyright (C) 2008 Jon A. Cruz
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/point.h>
+
+#include "message-stack.h"
+#include "style.h"
+#include "ui/tools/dynamic-base.h"
+#include "object/sp-use.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+enum class EraserToolMode
+{
+ DELETE,
+ CUT,
+ CLIP
+};
+static inline constexpr auto DEFAULT_ERASER_MODE = EraserToolMode::CUT;
+
+/** Represents an item to erase */
+struct EraseTarget
+{
+ SPItem *item = nullptr; ///< Pointer to the item to be erased
+ bool was_selected = false; ///< Whether the item was part of selection
+
+ EraseTarget(SPItem *ptr, bool sel)
+ : item{ptr}
+ , was_selected{sel}
+ {}
+ inline bool operator==(EraseTarget const &other) const noexcept { return item == other.item; }
+};
+
+class EraserTool : public DynamicBase {
+
+private:
+ // non-static data:
+ EraserToolMode mode = DEFAULT_ERASER_MODE;
+ bool nowidth = false;
+ std::vector<MessageId> _our_messages;
+ SPItem *_acid = nullptr;
+ std::vector<SPItem *> _survivers;
+ Pref<bool> _break_apart;
+ Pref<int> _mode_int;
+
+ // static data:
+ static constexpr uint32_t trace_color_rgba = 0xff0000ff; // RGBA red
+ static constexpr SPWindRule trace_wind_rule = SP_WIND_RULE_EVENODD;
+
+ static constexpr double tolerance = 0.1;
+
+ static constexpr double epsilon = 0.5e-6;
+ static constexpr double epsilon_start = 0.5e-2;
+ static constexpr double vel_start = 1e-5;
+
+ static constexpr double drag_default = 1.0;
+ static constexpr double drag_min = 0.0;
+ static constexpr double drag_max = 1.0;
+
+ static constexpr double min_pressure = 0.0;
+ static constexpr double max_pressure = 1.0;
+ static constexpr double default_pressure = 1.0;
+
+ static constexpr double min_tilt = -1.0;
+ static constexpr double max_tilt = 1.0;
+ static constexpr double default_tilt = 0.0;
+
+public:
+ // public member functions
+ EraserTool(SPDesktop *desktop);
+ ~EraserTool() override;
+ bool root_handler(GdkEvent *event) final;
+
+ using Error = std::uint64_t;
+ static constexpr Error ALL_GOOD = 0x0;
+ static constexpr Error NON_EXISTENT = 0x1 << 1;
+ static constexpr Error NO_AREA_PATH = 0x1 << 2;
+ static constexpr Error RASTER_IMAGE = 0x1 << 3;
+ static constexpr Error ERROR_GROUP = 0x1 << 4;
+
+private:
+ // private member functions
+ void _accumulate();
+ bool _apply(Geom::Point p);
+ bool _booleanErase(EraseTarget target, bool store_survivers);
+ void _brush();
+ void _cancel();
+ void _clearCurrent();
+ void _clearStatusBar();
+ void _clipErase(SPItem *item) const;
+ void _completeBezier(double tolerance_sq, bool releasing);
+ bool _cutErase(EraseTarget target, bool store_survivers);
+ bool _doWork();
+ void _drawTemporaryBox();
+ void _extinput(GdkEvent *event);
+ void _failedBezierFallback();
+ std::vector<EraseTarget> _filterByCollision(std::vector<EraseTarget> const &items, SPItem *with) const;
+ std::vector<EraseTarget> _filterCutEraseables(std::vector<EraseTarget> const &items, bool silent = false);
+ std::vector<EraseTarget> _findItemsToErase();
+ void _fitAndSplit(bool releasing);
+ void _fitDrawLastPoint();
+ bool _handleKeypress(GdkEventKey const *key);
+ void _handleStrokeStyle(SPItem *item) const;
+ SPItem *_insertAcidIntoDocument(SPDocument *document);
+ bool _performEraseOperation(std::vector<EraseTarget> const &items_to_erase, bool store_survivers);
+ void _reset(Geom::Point p);
+ void _setStatusBarMessage(char *message);
+ void _updateMode();
+
+ static void _generateNormalDist2(double &r1, double &r2);
+ static void _addCap(SPCurve &curve, Geom::Point const &pre, Geom::Point const &from, Geom::Point const &to,
+ Geom::Point const &post, double rounding);
+ static bool _isStraightSegment(SPItem *path);
+ static Error _uncuttableItemType(SPItem *item);
+ bool _probeUnlinkCutClonedGroup(EraseTarget &original_target, SPUse* clone, SPGroup* cloned_group,
+ bool store_survivers = true);
+};
+
+} // namespace Tools
+} // namespace UI
+} // namespace Inkscape
+
+#endif // ERASER_TOOL_H_SEEN
+
+/*
+ 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:textwidth=99 :