new file, derived from old libs/ardour/configuration.cc

libs/pbd/configuration_variable.cc

@@ -0,0 +1,109 @@
+/*
+    Copyright (C) 1999-2009 Paul Davis
+
+    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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <iostream>
+
+#include "pbd/compose.h"
+#include "pbd/configuration_variable.h"
+#include "pbd/debug.h"
+
+using namespace std;
+using namespace PBD;
+
+void
+ConfigVariableBase::add_to_node (XMLNode& node)
+{
+	const std::string v = get_as_string ();
+	DEBUG_TRACE (DEBUG::Configuration, string_compose ("Config variable %1 stored as [%2]\n", _name, v));
+	XMLNode* child = new XMLNode ("Option");
+	child->add_property ("name", _name);
+	child->add_property ("value", v);
+	node.add_child_nocopy (*child);
+}
+
+bool
+ConfigVariableBase::set_from_node (XMLNode const & node)
+{
+	if (node.name() == "Config" || node.name() == "Canvas" || node.name() == "UI") {
+
+		/* ardour.rc */
+
+		const XMLProperty* prop;
+		XMLNodeList nlist;
+		XMLNodeConstIterator niter;
+		XMLNode* child;
+
+		nlist = node.children();
+
+		for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
+
+			child = *niter;
+
+			if (child->name() == "Option") {
+				if ((prop = child->property ("name")) != 0) {
+					if (prop->value() == _name) {
+						if ((prop = child->property ("value")) != 0) {
+							set_from_string (prop->value());
+							return true;
+						}
+					}
+				}
+			}
+		}
+
+	} else if (node.name() == "Options") {
+
+		/* session file */
+
+		XMLNodeList olist;
+		XMLNodeConstIterator oiter;
+		XMLNode* option;
+		const XMLProperty* opt_prop;
+
+		olist = node.children();
+
+		for (oiter = olist.begin(); oiter != olist.end(); ++oiter) {
+
+			option = *oiter;
+
+			if (option->name() == _name) {
+				if ((opt_prop = option->property ("val")) != 0) {
+					set_from_string (opt_prop->value());
+					return true;
+				}
+			}
+		}
+	}
+
+	return false;
+}
+
+void
+ConfigVariableBase::notify ()
+{
+	// placeholder for any debugging desired when a config variable is modified
+}
+
+void
+ConfigVariableBase::miss ()
+{
+	// placeholder for any debugging desired when a config variable
+	// is set but to the same value as it already has
+}
+