1 files changed, 113 insertions, 0 deletions
diff --git a/src/object/sp-ellipse.h b/src/object/sp-ellipse.h
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+++ b/src/object/sp-ellipse.h
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * SVG <ellipse> and related implementations
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Mitsuru Oka
+ *   Tavmjong Bah
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ * Copyright (C) 2013 Tavmjong Bah
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_SP_ELLIPSE_H
+#define SEEN_SP_ELLIPSE_H
+
+#include "svg/svg-length.h"
+#include "sp-shape.h"
+
+/* Common parent class */
+#define SP_GENERICELLIPSE(obj) (dynamic_cast<SPGenericEllipse*>((SPObject*)obj))
+#define SP_IS_GENERICELLIPSE(obj) (dynamic_cast<const SPGenericEllipse*>((SPObject*)obj) != NULL)
+
+enum GenericEllipseType {
+    SP_GENERIC_ELLIPSE_UNDEFINED, // FIXME shouldn't exist
+    SP_GENERIC_ELLIPSE_ARC,
+    SP_GENERIC_ELLIPSE_CIRCLE,
+    SP_GENERIC_ELLIPSE_ELLIPSE
+};
+
+enum GenericEllipseArcType {
+    SP_GENERIC_ELLIPSE_ARC_TYPE_SLICE, // Default
+    SP_GENERIC_ELLIPSE_ARC_TYPE_ARC,
+    SP_GENERIC_ELLIPSE_ARC_TYPE_CHORD
+};
+
+class SPGenericEllipse : public SPShape {
+public:
+    SPGenericEllipse();
+    ~SPGenericEllipse() override;
+
+    // Regardless of type, the ellipse/circle/arc is stored
+    // internally with these variables. (Circle radius is rx).
+    SVGLength cx;
+    SVGLength cy;
+    SVGLength rx;
+    SVGLength ry;
+
+    // Return slice, chord, or arc.
+    GenericEllipseArcType arcType() { return arc_type; };
+    void setArcType(GenericEllipseArcType type) { arc_type = type; };
+
+    double start, end;
+    GenericEllipseType type;
+    GenericEllipseArcType arc_type;
+
+    void build(SPDocument *document, Inkscape::XML::Node *repr) override;
+
+    void set(SPAttributeEnum key, char const *value) override;
+    void update(SPCtx *ctx, unsigned int flags) override;
+
+    Inkscape::XML::Node *write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, unsigned int flags) override;
+    const char *displayName() const override;
+
+    void set_shape() override;
+    void update_patheffect(bool write) override;
+    Geom::Affine set_transform(Geom::Affine const &xform) override;
+
+    void snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const override;
+
+    void modified(unsigned int flags) override;
+
+    /**
+     * @brief Makes sure that start and end lie between 0 and 2 * PI.
+     */
+    void normalize();
+
+    Geom::Point getPointAtAngle(double arg) const;
+
+    bool set_elliptical_path_attribute(Inkscape::XML::Node *repr);
+    void position_set(double x, double y, double rx, double ry);
+
+    double getVisibleRx() const;
+    void setVisibleRx(double rx);
+
+    double getVisibleRy() const;
+    void setVisibleRy(double ry);
+
+protected:
+    /**
+     * @brief Determines whether the shape is a part of an ellipse.
+     */
+    bool _isSlice() const;
+
+private:
+    static double vectorStretch(Geom::Point p0, Geom::Point p1, Geom::Affine xform);
+};
+
+#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 :