Adding upstream version 1.3+ds.upstream/1.3+dsupstream

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

1 files changed, 155 insertions, 0 deletions

diff --git a/src/ui/tools/eraser-tool.h b/src/ui/tools/eraser-tool.h
new file mode 100644
index 0000000..5198ebd
--- /dev/null
+++ b/src/ui/tools/eraser-tool.h
@@ -0,0 +1,155 @@
+// 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 :