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Diffstat (limited to 'src/display/curve.h')
| -rw-r--r-- | src/display/curve.h | 147 |
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 : |