Add editor selection state to session history via a SelectionMemento, which

combines selection related editor properties with the current editor selection.

The related editor properties are:
mouse mode,
zoom setting,
left frame of the canvas,
y origin of the canvas.

Selection state now includes region views (storing the underlying region id)
and time.

This patch also fixes a region mute undo bug.

1 files changed, 34 insertions, 0 deletions

diff --git a/gtk2_ardour/selection_memento.h b/gtk2_ardour/selection_memento.h
new file mode 100644
index 0000000000..571f9c75b4
--- /dev/null
+++ b/gtk2_ardour/selection_memento.h
@@ -0,0 +1,34 @@
+/*
+    Copyright (C) 2014 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.
+
+*/
+
+#ifndef __ardour_gtk_selection_memento_h__
+#define __ardour_gtk_selection_memento_h__
+
+#include "pbd/statefuldestructible.h"
+
+class SelectionMemento : public PBD::StatefulDestructible
+{
+public:
+	SelectionMemento ();
+	~SelectionMemento ();
+
+	XMLNode& get_state ();
+	int set_state (const XMLNode&, int version);
+};
+#endif /* __ardour_gtk_selection_memento_h__ */