Add DocumentSubset as groundwork for layers

(bzr r205)

1 files changed, 70 insertions, 0 deletions

diff --git a/src/document-subset.h b/src/document-subset.h
new file mode 100644
index 000000000..0e40bab8d
--- /dev/null
+++ b/src/document-subset.h
@@ -0,0 +1,70 @@
+/*
+ * Inkscape::DocumentSubset - view of a document including only a subset
+ *                            of nodes
+ *
+ * Copyright 2006  MenTaLguY  <mental@rydia.net>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifndef SEEN_INKSCAPE_DOCUMENT_SUBSET_H
+#define SEEN_INKSCAPE_DOCUMENT_SUBSET_H
+
+#include <sigc++/connection.h>
+#include <sigc++/functors/slot.h>
+
+#include "gc-managed.h"
+#include "gc-anchored.h"
+
+class SPObject;
+class SPDocument;
+
+namespace Inkscape {
+
+class DocumentSubset : public GC::Managed<>,
+                       public GC::Anchored
+{
+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:
+    explicit DocumentSubset(SPDocument *document);
+
+    void _addOne(SPObject *obj);
+    void _removeOne(SPObject *obj) { _remove(obj, false); }
+    void _removeSubtree(SPObject *obj) { _remove(obj, true); }
+
+private:
+    DocumentSubset(DocumentSubset const &); // no copy
+    void operator=(DocumentSubset const &); // no assign
+
+    void _remove(SPObject *obj, bool subtree);
+
+    class Relations;
+
+    SPDocument *_document;
+    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:encoding=utf-8:textwidth=99 :