missing system-scheme.cc

diff --git a/lily/system-scheme.cc b/lily/system-scheme.cc
new file mode 100644 (file)
index 0000000..d0b7cfc
--- /dev/null
+++ b/lily/system-scheme.cc
@@ -0,0 +1,43 @@
+/*
+  system-scheme.cc -- implement scheme bindings to System
+
+  source file of the GNU LilyPond music typesetter
+
+  (c) 2007 Joe Neeman <joeneeman@gmail.com>
+*/
+
+#include "align-interface.hh"
+#include "pointer-group-interface.hh"
+#include "system.hh"
+
+
+LY_DEFINE (ly_system_print, "ly:system-print",
+          1, 0, 0, (SCM system),
+          "Draw the system and return the prob containing its "
+          "stencil.")
+{
+  Grob *me = unsmob_grob (system);
+  System *me_system = dynamic_cast<System*> (me);
+  SCM_ASSERT_TYPE (me, system, SCM_ARG1, __FUNCTION__, "grob");
+
+  return me_system->get_paper_system ();
+}
+
+LY_DEFINE (ly_system_stretch, "ly:system-stretch",
+          2, 0, 0, (SCM system, SCM amount_scm),
+          "Stretch the system vertically by the given amount. "
+          "This must be called before the system is drawn (for example "
+          "with ly:system-print).")
+{
+  Grob *me = unsmob_grob (system);
+  Real amount = robust_scm2double (amount_scm, 0.0);
+  
+  extract_grob_set (me, "elements", elts);
+  for (vsize i = 0; i < elts.size (); i++)
+    if (Align_interface::has_interface (elts[i]))
+      {
+       Align_interface::stretch (elts[i], amount, Y_AXIS);
+       break;
+      }
+  return SCM_UNDEFINED;
+}