Allow to construct a XML tree from a text buffer

2 files changed, 10 insertions, 3 deletions

diff --git a/libs/pbd/pbd/xml++.h b/libs/pbd/pbd/xml++.h
index 8e348a4483..9064bc1854 100644
--- a/libs/pbd/pbd/xml++.h
+++ b/libs/pbd/pbd/xml++.h
@@ -70,7 +70,7 @@ public:
 	bool read(const std::string& fn) { set_filename(fn); return read_internal(false); }
 	bool read_and_validate() { return read_internal(true); }
 	bool read_and_validate(const std::string& fn) { set_filename(fn); return read_internal(true); }
-	bool read_buffer(const std::string&);
+	bool read_buffer(const std::string&, bool to_tree_doc = false);
 
 	bool write() const;
 	bool write(const std::string& fn) { set_filename(fn); return write(); }
diff --git a/libs/pbd/xml++.cc b/libs/pbd/xml++.cc
index e19a5ab244..dbe6d51e0d 100644
--- a/libs/pbd/xml++.cc
+++ b/libs/pbd/xml++.cc
@@ -120,7 +120,7 @@ XMLTree::read_internal(bool validate)
 }
 
 bool
-XMLTree::read_buffer(const string& buffer)
+XMLTree::read_buffer(const string& buffer, bool to_tree_doc)
 {
 	xmlDocPtr doc;
 
@@ -135,7 +135,14 @@ XMLTree::read_buffer(const string& buffer)
 	}
 
 	_root = readnode(xmlDocGetRootElement(doc));
-	xmlFreeDoc(doc);
+	if (to_tree_doc) {
+		if (_doc) {
+			xmlFreeDoc (_doc);
+		}
+		_doc = doc;
+	} else {
+		xmlFreeDoc (doc);
+	}
 
 	return true;
 }