1 files changed, 147 insertions, 0 deletions
diff --git a/src/display/curve.h b/src/display/curve.h
new file mode 100644
index 0000000..f8ae603
--- /dev/null
+++ b/src/display/curve.h
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 2000 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ * Copyright (C) 2002 Lauris Kaplinski
+ * Copyright (C) 2008 Johan Engelen
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_DISPLAY_CURVE_H
+#define SEEN_DISPLAY_CURVE_H
+
+#include <2geom/pathvector.h>
+#include <cstddef>
+#include <optional>
+#include <list>
+#include <memory>
+#include <utility>
+
+class SPCurve;
+
+/**
+ * Wrapper around a Geom::PathVector object.
+ */
+class SPCurve {
+    //! Preferred smart pointer type for SPCurve
+    using smart_pointer = ::std::unique_ptr<SPCurve>;
+
+public:
+    /* Constructors */
+    explicit SPCurve() = default;
+    explicit SPCurve(Geom::PathVector pathv)
+        : _pathv(std::move(pathv))
+    {}
+
+    // move
+    SPCurve(SPCurve &&other)
+        : _pathv(std::move(other._pathv))
+    {}
+    SPCurve &operator=(SPCurve &&other)
+    {
+        _pathv = std::move(other._pathv);
+        return *this;
+    }
+
+    static smart_pointer new_from_rect(Geom::Rect const &rect, bool all_four_sides = false);
+    static smart_pointer copy(SPCurve const *);
+
+    virtual ~SPCurve();
+
+    // Don't implement these:
+    SPCurve(const SPCurve&) = delete;
+    SPCurve& operator=(const SPCurve&) = delete;
+
+    void set_pathvector(Geom::PathVector const & new_pathv);
+    Geom::PathVector const & get_pathvector() const;
+
+    smart_pointer ref();
+    smart_pointer copy() const;
+
+    size_t get_segment_count() const;
+    size_t nodes_in_path() const;
+
+    bool is_empty() const;
+    bool is_unset() const;
+    bool is_closed() const;
+    bool is_equal(SPCurve const *other) const;
+    bool is_similar(SPCurve const *other, double precission = 0.001) const;
+    Geom::Curve const * last_segment() const;
+    Geom::Path const * last_path() const;
+    Geom::Curve const * first_segment() const;
+    Geom::Path const * first_path() const;
+    std::optional<Geom::Point> first_point() const;
+    std::optional<Geom::Point> last_point() const;
+    std::optional<Geom::Point> second_point() const;
+    std::optional<Geom::Point> penultimate_point() const;
+
+    void reset();
+
+    void moveto(Geom::Point const &p);
+    void moveto(double x, double y);
+    void lineto(Geom::Point const &p);
+    void lineto(double x, double y);
+    void quadto(Geom::Point const &p1, Geom::Point const &p2);
+    void quadto(double x1, double y1, double x2, double y2);
+    void curveto(Geom::Point const &p0, Geom::Point const &p1, Geom::Point const &p2);
+    void curveto(double x0, double y0, double x1, double y1, double x2, double y2);
+    void closepath();
+    void closepath_current();
+    void backspace();
+
+    void transform(Geom::Affine const &m);
+    void stretch_endpoints(Geom::Point const &, Geom::Point const &);
+    void move_endpoints(Geom::Point const &, Geom::Point const &);
+    void last_point_additive_move(Geom::Point const & p);
+
+    void append(Geom::PathVector const &, bool use_lineto = false);
+    void append(SPCurve const &curve2, bool use_lineto = false);
+
+    bool append_continuous(SPCurve const &c1, double tolerance = 0.0625);
+
+    smart_pointer create_reverse() const;
+
+    std::list<smart_pointer> split() const;
+    std::list<smart_pointer> split_non_overlapping() const;
+
+    friend class std::default_delete<SPCurve>;
+    friend class CurveTest; // for ref count test
+
+private:
+    void _unref();
+
+protected:
+    size_t _refcount = 1;
+
+    Geom::PathVector _pathv;
+};
+
+/**
+ * Specialized deleter allows using std::unique_ptr<SPCurve> with shared references.
+ */
+template <>
+inline void ::std::default_delete<SPCurve>::operator()(SPCurve *ptr) const
+// This is `noexcept` in libc++ but not in libstdc++
+#ifdef _LIBCPP_VERSION
+    noexcept
+#endif
+{
+    ptr->_unref();
+}
+
+#endif // !SEEN_DISPLAY_CURVE_H
+
+/*
+  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 :