1 files changed, 70 insertions, 0 deletions
diff --git a/src/document-subset.h b/src/document-subset.h
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--- /dev/null
+++ b/src/document-subset.h
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Inkscape::DocumentSubset - view of a document including only a subset
+ *                            of nodes
+ *
+ * Copyright 2006  MenTaLguY  <mental@rydia.net>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_INKSCAPE_DOCUMENT_SUBSET_H
+#define SEEN_INKSCAPE_DOCUMENT_SUBSET_H
+
+#include <cstddef>
+#include <memory>
+#include <sigc++/connection.h>
+#include <sigc++/functors/slot.h>
+
+class SPObject;
+class SPDocument;
+
+namespace Inkscape {
+
+class DocumentSubset
+{
+public:
+    bool includes(SPObject *obj) const;
+
+    SPObject *parentOf(SPObject *obj) const;
+    unsigned childCount(SPObject *obj) const;
+    unsigned indexOf(SPObject *obj) const;
+    SPObject *nthChildOf(SPObject *obj, unsigned n) const;
+
+    sigc::connection connectChanged(sigc::slot<void ()> slot) const;
+    sigc::connection connectAdded(sigc::slot<void (SPObject *)> slot) const;
+    sigc::connection connectRemoved(sigc::slot<void (SPObject *)> slot) const;
+
+protected:
+    DocumentSubset();
+    ~DocumentSubset();
+
+    void _addOne(SPObject *obj);
+    void _removeOne(SPObject *obj) { _remove(obj, false); }
+    void _removeSubtree(SPObject *obj) { _remove(obj, true); }
+    void _clear();
+
+private:
+    DocumentSubset(DocumentSubset const &) = delete; // no copy
+    void operator=(DocumentSubset const &) = delete; // no assign
+
+    void _remove(SPObject *obj, bool subtree);
+
+    struct Relations;
+
+    std::unique_ptr<Relations> _relations;
+};
+
+}
+
+#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:textwidth=99 :