lilypond-1.3.116

diff --git a/lily/hairpin.cc b/lily/hairpin.cc
new file mode 100644 (file)
index 0000000..b4b646c
--- /dev/null
+++ b/lily/hairpin.cc
@@ -0,0 +1,95 @@
+/*
+  hairpin.cc -- implement Hairpin
+
+  source file of the GNU LilyPond music typesetter
+
+  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
+#include "molecule.hh"
+#include "hairpin.hh"
+#include "spanner.hh"
+#include "font-interface.hh"
+#include "dimensions.hh"
+#include "paper-def.hh"
+#include "debug.hh"
+#include "paper-column.hh"
+
+MAKE_SCHEME_CALLBACK (Hairpin, brew_molecule, 1);
+
+SCM
+Hairpin::brew_molecule (SCM smob) 
+{
+  Grob *me= unsmob_grob (smob);
+  Spanner *spanner = dynamic_cast<Spanner*>(me);
+
+  Real line = me->paper_l ()->get_var ("stafflinethickness");  
+  
+  SCM s = me->get_grob_property("grow-direction");
+  if (!isdir_b (s))
+    {
+      me->suicide ();
+      return SCM_EOL;
+    }
+  
+  Direction grow_dir = to_dir (s);
+
+
+  /* Ugh, must be same as Text_spanner::brew_molecule.  */  
+  Real padding = gh_scm2double (me->get_grob_property ("padding"));
+  Real broken_left =  spanner->get_broken_left_end_align ();
+  Real width = spanner->spanner_length ();
+  width -= broken_left;
+
+  Drul_array<bool> broken;
+  Drul_array<Real> extra_off;
+  Direction d = LEFT;
+  do
+    {
+      Item *b = spanner->get_bound (d);
+      broken[d] = b->break_status_dir () != CENTER;
+
+      if (!broken [d])
+       {
+
+         Interval e =b->extent (b, X_AXIS);
+         Real r = 0.0;
+         if (!e.empty_b ())
+           r = e[-d] + padding;
+         width += d * r;
+         extra_off[d] = r;
+       }
+    }
+  while (flip (&d) != LEFT);
+
+  // FIXME: ecs tells us
+  width += gh_scm2double (me->get_grob_property ("width-correct"));
+  /* /Ugh */
+  
+  if (width < 0)
+    {
+      warning (_ ((grow_dir < 0) ? "decrescendo too small"
+                 : "crescendo too small"));
+      width = 0;
+    }
+
+  bool continued = broken[Direction (-grow_dir)];
+  Real height = gh_scm2double (me->get_grob_property ("height"));
+  Real thick = line * gh_scm2double (me->get_grob_property ("thickness"));
+  
+  const char* type = (grow_dir < 0) ? "decrescendo" :  "crescendo";
+  SCM hairpin = gh_list (ly_symbol2scm (type),
+                   gh_double2scm (thick),
+                   gh_double2scm (width),
+                   gh_double2scm (height),
+                   gh_double2scm (continued ? height/2 : 0.0),
+                   SCM_UNDEFINED);
+
+  Box b (Interval (0, width), Interval (-2*height, 2*height));
+  Molecule mol (b, hairpin);
+  mol.translate_axis (broken_left + extra_off[LEFT], X_AXIS);
+
+  return mol.smobbed_copy ();
+}
+
+