improve luawindow save/load/revert

diff --git a/gtk2_ardour/luawindow.cc b/gtk2_ardour/luawindow.cc
index 155c6908acb8d8507493795a99948629b28c62db..b841b3b6ead3e612658a86c17cce4d78360d4280 100644 (file)
--- a/gtk2_ardour/luawindow.cc
+++ b/gtk2_ardour/luawindow.cc
@@ -605,7 +605,7 @@ LuaWindow::script_selection_changed (ScriptBufferPtr n, bool force)
 
        Glib::RefPtr<Gtk::TextBuffer> tb (entry.get_buffer());
 
-       if ((n->flags & Buffer_Valid)) {
+       if (_current_buffer->flags & Buffer_Valid) {
                _current_buffer->script = tb->get_text();
        }
 
@@ -671,6 +671,7 @@ LuaWindow::ScriptBuffer::ScriptBuffer (const std::string& n)
        , flags (Buffer_Scratch | Buffer_Valid)
 {
        script =
+               "---- this header is (only) required to save the script\n"
                "-- ardour { [\"type\"] = \"Snippet\", name = \"\" }\n"
                "-- function factory () return function () -- -- end end\n";
 }
@@ -708,11 +709,12 @@ LuaWindow::ScriptBuffer::~ScriptBuffer ()
 bool
 LuaWindow::ScriptBuffer::load ()
 {
+       assert (!(flags & Buffer_Valid));
        if (!(flags & Buffer_HasFile)) return false;
-       if (flags & Buffer_Valid) return true;
        try {
                script = Glib::file_get_contents (path);
                flags |= Buffer_Valid;
+               flags &= BufferFlags(~Buffer_Dirty);
        } catch (Glib::FileError e) {
                return false;
        }