1 files changed, 63 insertions, 0 deletions
diff --git a/src/xml/subtree.cpp b/src/xml/subtree.cpp
new file mode 100644
index 0000000..5340c2a
--- /dev/null
+++ b/src/xml/subtree.cpp
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * XML::Subtree - proxy for an XML subtree
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Copyright 2005 MenTaLguY <mental@rydia.net>
+ * 
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "xml/node.h"
+#include "xml/subtree.h"
+#include "xml/node-iterators.h"
+
+namespace Inkscape {
+namespace XML {
+
+Subtree::Subtree(Node &root) : _root(root) {
+    _root.addSubtreeObserver(_observers);
+}
+
+Subtree::~Subtree() {
+    _root.removeSubtreeObserver(_observers);
+}
+
+namespace {
+
+void synthesize_events_recursive(Node &node, NodeObserver &observer) {
+    node.synthesizeEvents(observer);
+    for ( NodeSiblingIterator iter = node.firstChild() ; iter ; ++iter ) {
+        synthesize_events_recursive(*iter, observer);
+    }
+}
+
+}
+
+void Subtree::synthesizeEvents(NodeObserver &observer) {
+    synthesize_events_recursive(_root, observer);
+}
+
+void Subtree::addObserver(NodeObserver &observer) {
+    _observers.add(observer);
+}
+
+void Subtree::removeObserver(NodeObserver &observer) {
+    _observers.remove(observer); 
+}
+
+}
+}
+
+/*
+  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 :