Support cut/copy/paste of several regions and lines at once.

The idea here is to do the reasonable thing, and copy objects of some
type (e.g. MIDI region, gain line) to tracks with a matching type.  The user
can override this with a track selection, which will be used straight-up.

Lost: ability to copy/paste lines across types, e.g. gain to pan.  This is
often questionable, but sometimes useful, so we will need to implement some
sort of "greedy mode" to make it possible.  Implementation simple, but not sure
what to do.  Perhaps this should only be possible if one automation track is
explicitly (i.e. via track selection) involved, and the types are at least
compatible-ish?

1 files changed, 18 insertions, 5 deletions

diff --git a/gtk2_ardour/automation_selection.h b/gtk2_ardour/automation_selection.h
index 6f30c588e2..204f4f19be 100644
--- a/gtk2_ardour/automation_selection.h
+++ b/gtk2_ardour/automation_selection.h
@@ -22,10 +22,23 @@
 
 #include <list>
 
-namespace ARDOUR {
-	class AutomationList;
-}
-
-class AutomationSelection : public std::list<boost::shared_ptr<ARDOUR::AutomationList> > {};
+#include "ardour/automation_list.h"
+#include "evoral/Parameter.hpp"
+
+class AutomationSelection : public std::list<boost::shared_ptr<ARDOUR::AutomationList> > {
+public:
+	const_iterator
+	get_nth(const Evoral::Parameter& param, size_t nth) const {
+		size_t count = 0;
+		for (const_iterator l = begin(); l != end(); ++l) {
+			if ((*l)->parameter() == param) {
+				if (count++ == nth) {
+					return l;
+				}
+			}
+		}
+		return end();
+	}
+};
 
 #endif /* __ardour_gtk_automation_selection_h__ */