1 files changed, 70 insertions, 0 deletions
diff --git a/src/display/control/canvas-item-group.h b/src/display/control/canvas-item-group.h
new file mode 100644
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--- /dev/null
+++ b/src/display/control/canvas-item-group.h
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_CANVAS_ITEM_GROUP_H
+#define SEEN_CANVAS_ITEM_GROUP_H
+
+/**
+ * A CanvasItem that contains other CanvasItems.
+ */
+/*
+ * Author:
+ *   Tavmjong Bah
+ *
+ * Copyright (C) 2020 Tavmjong Bah
+ *
+ * Rewrite of SPCanvasGroup
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "canvas-item.h"
+
+namespace Inkscape {
+
+class CanvasItemGroup final : public CanvasItem
+{
+public:
+    CanvasItemGroup(CanvasItemGroup *group);
+    CanvasItemGroup(CanvasItemContext *context);
+
+    // Geometry
+    void visit_page_rects(std::function<void(Geom::Rect const &)> const &) const override;
+
+    // Selection
+    CanvasItem *pick_item(Geom::Point const &p);
+
+protected:
+    friend class CanvasItem; // access to items
+    friend class CanvasItemContext; // access to destructor
+
+    ~CanvasItemGroup() override;
+
+    void _update(bool propagate) override;
+    void _mark_net_invisible() override;
+    void _render(Inkscape::CanvasItemBuffer &buf) const override;
+
+    /**
+     * Type for linked list storing CanvasItems.
+     * Used to speed deletion when a group contains a large number of items (as in nodes for a complex path).
+     */
+    using CanvasItemList = boost::intrusive::list<
+        Inkscape::CanvasItem,
+        boost::intrusive::member_hook<Inkscape::CanvasItem, boost::intrusive::list_member_hook<>,
+                                      &Inkscape::CanvasItem::member_hook>>;
+
+    CanvasItemList items;
+};
+
+} // namespace Inkscape
+
+#endif // SEEN_CANVAS_ITEM_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 :