initial implementation of XML::Subtree API for tracking changes on a

whole-subtree basis; the initial implementation does not have very good
performance for large subtrees, but should work well for smaller ones

(bzr r3158)

1 files changed, 73 insertions, 0 deletions

diff --git a/src/xml/subtree.h b/src/xml/subtree.h
new file mode 100644
index 000000000..73a6485d1
--- /dev/null
+++ b/src/xml/subtree.h
@@ -0,0 +1,73 @@
+/*
+ * XML::Subtree - proxy for an XML subtree
+ *
+ * Copyright 2005 MenTaLguY <mental@rydia.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * See the file COPYING for details.
+ *
+ */
+
+#ifndef SEEN_INKSCAPE_XML_SUBTREE_H
+#define SEEN_INKSCAPE_XML_SUBTREE_H
+
+#include "xml/node-observer.h"
+#include "xml/composite-node-observer.h"
+
+namespace Inkscape {
+namespace XML {
+
+class Node;
+
+class Subtree : public Inkscape::GC::Anchored,
+                public Inkscape::GC::Managed<>,
+                private NodeObserver
+{
+public:
+    Subtree(Node &root);
+    ~Subtree();
+
+    void finish();
+
+    void synthesizeEvents(NodeObserver &observer);
+    void addObserver(NodeObserver &observer);
+    void removeObserver(NodeObserver &observer);
+
+private:
+    void notifyChildAdded(Node &node, Node &child, Node *prev);
+
+    void notifyChildRemoved(Node &node, Node &child, Node *prev);
+
+    void notifyChildOrderChanged(Node &node, Node &child,
+                                 Node *old_prev, Node *new_prev);
+
+    void notifyContentChanged(Node &node,
+                              Util::ptr_shared<char> old_content,
+                              Util::ptr_shared<char> new_content);
+
+    void notifyAttributeChanged(Node &node, GQuark name,
+                                Util::ptr_shared<char> old_value,
+                                Util::ptr_shared<char> new_value);
+
+    Node *_root;
+    CompositeNodeObserver _observers;
+};
+
+}
+}
+
+#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 :