1 files changed, 197 insertions, 0 deletions
diff --git a/src/object/sp-hatch.h b/src/object/sp-hatch.h
new file mode 100644
index 0000000..903bc8e
--- /dev/null
+++ b/src/object/sp-hatch.h
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * SVG <hatch> implementation
+ */
+/*
+ * Authors:
+ *   Tomasz Boczkowski <penginsbacon@gmail.com>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2014 Tomasz Boczkowski
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_SP_HATCH_H
+#define SEEN_SP_HATCH_H
+
+#include <list>
+#include <cstddef>
+#include <glibmm/ustring.h>
+#include <sigc++/connection.h>
+
+#include "svg/svg-length.h"
+#include "svg/svg-angle.h"
+#include "sp-paint-server.h"
+#include "uri-references.h"
+
+class SPHatchReference;
+class SPHatchPath;
+class SPItem;
+
+namespace Inkscape {
+
+class Drawing;
+class DrawingPattern;
+
+namespace XML {
+
+class Node;
+
+}
+}
+
+#define SP_HATCH(obj) (dynamic_cast<SPHatch *>((SPObject *)obj))
+#define SP_IS_HATCH(obj) (dynamic_cast<const SPHatch *>((SPObject *)obj) != NULL)
+
+class SPHatch : public SPPaintServer {
+public:
+    enum HatchUnits {
+        UNITS_USERSPACEONUSE,
+        UNITS_OBJECTBOUNDINGBOX
+    };
+
+    class RenderInfo {
+    public:
+        RenderInfo();
+        ~RenderInfo();
+
+        Geom::Affine child_transform;
+        Geom::Affine pattern_to_user_transform;
+        Geom::Rect tile_rect;
+
+        int overflow_steps;
+        Geom::Affine overflow_step_transform;
+        Geom::Affine overflow_initial_transform;
+    };
+
+    SPHatch();
+    ~SPHatch() override;
+
+    // Reference (href)
+    Glib::ustring href;
+    SPHatchReference *ref;
+
+    gdouble x() const;
+    gdouble y() const;
+    gdouble pitch() const;
+    gdouble rotate() const;
+    HatchUnits hatchUnits() const;
+    HatchUnits hatchContentUnits() const;
+    Geom::Affine const &hatchTransform() const;
+    SPHatch *rootHatch(); //TODO: const
+
+    std::vector<SPHatchPath *> hatchPaths();
+    std::vector<SPHatchPath const *> hatchPaths() const;
+
+    SPHatch *clone_if_necessary(SPItem *item, const gchar *property);
+    void transform_multiply(Geom::Affine postmul, bool set);
+
+    bool isValid() const override;
+
+    Inkscape::DrawingPattern *show(Inkscape::Drawing &drawing, unsigned int key, Geom::OptRect bbox) override;
+    void hide(unsigned int key) override;
+    cairo_pattern_t* pattern_new(cairo_t *ct, Geom::OptRect const &bbox, double opacity) override;
+
+    RenderInfo calculateRenderInfo(unsigned key) const;
+    Geom::Interval bounds() const;
+    void setBBox(unsigned int key, Geom::OptRect const &bbox) override;
+
+protected:
+    void build(SPDocument* doc, Inkscape::XML::Node* repr) override;
+    void release() override;
+    void child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) override;
+    void set(SPAttr key, const gchar* value) override;
+    void update(SPCtx* ctx, unsigned int flags) override;
+    void modified(unsigned int flags) override;
+
+private:
+    class View {
+    public:
+        View(Inkscape::DrawingPattern *arenaitem, int key);
+        //Do not delete arenaitem in destructor.
+
+        ~View();
+
+        Inkscape::DrawingPattern *arenaitem;
+        Geom::OptRect bbox;
+        unsigned int key;
+    };
+
+    typedef std::vector<SPHatchPath *>::iterator ChildIterator;
+    typedef std::vector<SPHatchPath const *>::const_iterator ConstChildIterator;
+    typedef std::list<View>::iterator ViewIterator;
+    typedef std::list<View>::const_iterator ConstViewIterator;
+
+    static bool _hasHatchPatchChildren(SPHatch const* hatch);
+
+    void _updateView(View &view);
+    RenderInfo _calculateRenderInfo(View const &view) const;
+    Geom::OptInterval _calculateStripExtents(Geom::OptRect const &bbox) const;
+
+    /**
+    Count how many times hatch is used by the styles of o and its descendants
+    */
+    guint _countHrefs(SPObject *o) const;
+
+    /**
+     * Gets called when the hatch is reattached to another <hatch>
+     */
+    void _onRefChanged(SPObject *old_ref, SPObject *ref);
+
+    /**
+     * Gets called when the referenced <hatch> is changed
+     */
+    void _onRefModified(SPObject *ref, guint flags);
+
+    // patternUnits and patternContentUnits attribute
+    HatchUnits _hatchUnits : 1;
+    bool _hatchUnits_set : 1;
+    HatchUnits _hatchContentUnits : 1;
+    bool _hatchContentUnits_set : 1;
+
+    // hatchTransform attribute
+    Geom::Affine _hatchTransform;
+    bool _hatchTransform_set : 1;
+
+    // Strip
+    SVGLength _x;
+    SVGLength _y;
+    SVGLength _pitch;
+    SVGAngle _rotate;
+
+    sigc::connection _modified_connection;
+
+    std::list<View> _display;
+};
+
+
+class SPHatchReference : public Inkscape::URIReference {
+public:
+    SPHatchReference (SPObject *obj)
+        : URIReference(obj)
+    {}
+
+    SPHatch *getObject() const {
+        return reinterpret_cast<SPHatch *>(URIReference::getObject());
+    }
+
+protected:
+    bool _acceptObject(SPObject *obj) const override {
+        return dynamic_cast<SPHatch *>(obj) != nullptr && URIReference::_acceptObject(obj);
+    }
+};
+
+#endif // SEEN_SP_HATCH_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:textwidth=99 :