new actions: allow user to set session start and end to playhead location

gtk2_ardour/ardour.menus.in

@@ -70,6 +70,7 @@
       <separator/>
       <menuitem action='set-loop-from-edit-range'/>
       <menuitem action='set-punch-from-edit-range'/>
+      <menuitem action='set-session-from-edit-range'/>
 
       <separator/>
       <menuitem action='Forward'/>
@@ -129,6 +130,9 @@
         <menuitem action='goto-mark-7'/>
         <menuitem action='goto-mark-8'/>
         <menuitem action='goto-mark-9'/>
+        <separator/>
+		<menuitem action='set-session-start-from-playhead'/>
+		<menuitem action='set-session-end-from-playhead'/>
       </menu>
 
       <separator/>

gtk2_ardour/editor.h

@@ -1441,6 +1441,8 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 	void set_punch_from_selection ();
 	void set_punch_from_region ();
 
+	void set_session_start_from_playhead ();
+	void set_session_end_from_playhead ();
 	void set_session_extents_from_selection ();
 
 	void set_loop_from_region (bool play);

gtk2_ardour/editor_actions.cc

@@ -248,6 +248,9 @@ Editor::register_actions ()
 	reg_sens (editor_actions, "jump-backward-to-mark", _("Jump to Previous Mark"), sigc::mem_fun(*this, &Editor::jump_backward_to_mark));
 	reg_sens (editor_actions, "alternate-jump-backward-to-mark", _("Jump to Previous Mark"), sigc::mem_fun(*this, &Editor::jump_backward_to_mark));
 
+	reg_sens (editor_actions, "set-session-start-from-playhead", _("Set Session Start from Playhead"), sigc::mem_fun(*this, &Editor::set_session_start_from_playhead));
+	reg_sens (editor_actions, "set-session-end-from-playhead", _("Set Session End from Playhead"), sigc::mem_fun(*this, &Editor::set_session_end_from_playhead));
+
 	reg_sens (editor_actions, "add-location-from-playhead", _("Add Mark from Playhead"), sigc::mem_fun(*this, &Editor::add_location_from_playhead_cursor));
 	reg_sens (editor_actions, "alternate-add-location-from-playhead", _("Add Mark from Playhead"), sigc::mem_fun(*this, &Editor::add_location_from_playhead_cursor));
 

gtk2_ardour/editor_ops.cc

@@ -2114,6 +2114,54 @@ Editor::add_location_mark (framepos_t where)
 	commit_reversible_command ();
 }
 
+void
+Editor::set_session_start_from_playhead ()
+{
+	if (!_session)
+		return;
+	
+	Location* loc;
+	if ((loc = _session->locations()->session_range_location()) == 0) {  //should never happen
+		_session->set_session_extents ( _session->audible_frame(), _session->audible_frame() );
+	} else {
+		XMLNode &before = loc->get_state();
+
+		_session->set_session_extents ( _session->audible_frame(), loc->end() );
+
+		XMLNode &after = loc->get_state();
+
+		begin_reversible_command (_("Set session start"));
+		
+		_session->add_command (new MementoCommand<Location>(*loc, &before, &after));
+
+		commit_reversible_command ();
+	}
+}
+
+void
+Editor::set_session_end_from_playhead ()
+{
+	if (!_session)
+		return;
+	
+	Location* loc;
+	if ((loc = _session->locations()->session_range_location()) == 0) {  //should never happen
+		_session->set_session_extents ( _session->audible_frame(), _session->audible_frame() );
+	} else {
+		XMLNode &before = loc->get_state();
+
+		_session->set_session_extents ( loc->start(), _session->audible_frame() );
+
+		XMLNode &after = loc->get_state();
+
+		begin_reversible_command (_("Set session start"));
+
+		_session->add_command (new MementoCommand<Location>(*loc, &before, &after));
+
+		commit_reversible_command ();
+	}
+}
+
 void
 Editor::add_location_from_playhead_cursor ()
 {
@@ -6038,8 +6086,6 @@ Editor::set_session_extents_from_selection ()
 	if (!get_selection_extents ( start, end))
 		return;
 
-	begin_reversible_command (_("set session start/end from selection"));
-
 	Location* loc;
 	if ((loc = _session->locations()->session_range_location()) == 0) {
 		_session->set_session_extents ( start, end );  // this will create a new session range;  no need for UNDO
@@ -6050,6 +6096,8 @@ Editor::set_session_extents_from_selection ()
 
 		XMLNode &after = loc->get_state();
 
+		begin_reversible_command (_("set session start/end from selection"));
+
 		_session->add_command (new MementoCommand<Location>(*loc, &before, &after));
 
 		commit_reversible_command ();

gtk2_ardour/mnemonic-us.bindings.in

@@ -106,8 +106,7 @@ This mode provides many different operations on both regions and control points,
 
 @trans|Editor/add-location-from-playhead|nabla|add marker
 @trans|Editor/remove-location-from-playhead|<@PRIMARY@>nabla|add marker
-;@trans|Transport/GotoStart|Return|to start marker
-@movp|Transport/alternate-GotoStart|KP_Return|to edit point
+@movp|Transport/alternate-GotoStart|Return|to start marker
 
 @trans|Editor/editor-fade-range|slash|fade range selection
 @rop|Region/set-fade-in-length|<@PRIMARY@>slash|set fade in length