goodbye to MementoCommand for playlists

git-svn-id: svn://localhost/ardour2/branches/3.0@6726 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/ardour/ardour/playlist.h

@@ -35,6 +35,7 @@
 
 #include "pbd/undo.h"
 #include "pbd/stateful.h"
+#include "pbd/stateful_owner.h"
 #include "pbd/statefuldestructible.h"
 #include "pbd/sequence_property.h"
 
@@ -83,6 +84,7 @@ class RegionListProperty : public PBD::SequenceProperty<std::list<boost::shared_
 };
 
 class Playlist : public SessionObject
+               , public PBD::StatefulOwner
 	       , public boost::enable_shared_from_this<Playlist> {
   public:
 	typedef std::list<boost::shared_ptr<Region> >    RegionList;
@@ -97,6 +99,8 @@ class Playlist : public SessionObject
 
         bool set_property (const PBD::PropertyBase&);
         void update (const RegionListProperty::ChangeRecord&);
+        void clear_owned_history ();
+        void rdiff (std::vector<PBD::StatefulDiffCommand*>&) const;
 
         PBD::PropertyList* property_factory (const XMLNode&) const;
 

libs/ardour/playlist.cc

@@ -26,9 +26,9 @@
 #include <climits>
 
 #include "pbd/failed_constructor.h"
+#include "pbd/stateful_diff_command.h"
 #include "pbd/stl_delete.h"
 #include "pbd/xml++.h"
-#include "pbd/stacktrace.h"
 
 #include "ardour/debug.h"
 #include "ardour/playlist.h"
@@ -2025,6 +2025,29 @@ Playlist::set_property (const PropertyBase& prop)
         return false;
 }
 
+void
+Playlist::rdiff (vector<StatefulDiffCommand*>& cmds) const
+{
+	RegionLock rlock (const_cast<Playlist *> (this));
+
+	for (RegionList::const_iterator i = regions.begin(); i != regions.end(); ++i) {
+		if ((*i)->changed ()) {
+                        StatefulDiffCommand* sdc = new StatefulDiffCommand (*i);
+                        cmds.push_back (sdc);
+                }
+	}
+}
+
+void
+Playlist::clear_owned_history ()
+{
+	RegionLock rlock (this);
+
+	for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
+                (*i)->clear_history ();
+        }
+}
+
 void
 Playlist::update (const RegionListProperty::ChangeRecord& change)
 {

libs/pbd/pbd/property_basics.h

@@ -95,6 +95,7 @@ public:
 
 	const gchar*property_name () const { return g_quark_to_string (_property_id); }
 	PropertyID  property_id () const   { return _property_id; }
+        bool changed() const { return _have_old; }
 
 	bool operator==(PropertyID pid) const {
 		return _property_id == pid;

libs/pbd/pbd/stateful.h

@@ -71,6 +71,8 @@ class Stateful {
 
 	void clear_history ();
         void diff (PropertyList&, PropertyList&) const;
+        bool changed() const;
+
         /* create a property list from an XMLNode
          */
         virtual PropertyList* property_factory(const XMLNode&) const { return 0; }

libs/pbd/stateful.cc

@@ -287,5 +287,16 @@ Stateful::resume_property_changes ()
         send_change (what_changed);
 }
 
+bool
+Stateful::changed() const  
+{
+	for (OwnedPropertyList::const_iterator i = _properties->begin(); i != _properties->end(); ++i) {
+                if (i->second->changed()) {
+                        return true;
+                }
+        }
+
+        return false;
+}
 
 } // namespace PBD