release: 1.3.68

[lilypond.git] / lily / crescendo.cc

diff --git a/lily/crescendo.cc b/lily/crescendo.cc
index b499af90b69e42b964283ac9660e1f50368ef561..8ba2b7ef9e6e309a87d74ec2981bc3a53ae79718 100644 (file)
--- a/lily/crescendo.cc
+++ b/lily/crescendo.cc
@@ -3,72 +3,133 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
 #include "molecule.hh"
 #include "crescendo.hh"
+#include "spanner.hh"
 #include "lookup.hh"
 #include "dimensions.hh"
 #include "paper-def.hh"
 #include "debug.hh"
-#include "score-column.hh"
+#include "paper-column.hh"
 
-Crescendo::Crescendo ()
+void
+Crescendo::set_interface (Score_element*s)
 {
-  grow_dir_ =0;
-  dyn_b_drul_[LEFT] = dyn_b_drul_[RIGHT] =false;
+  s->set_elt_pointer ("dynamic-drul", gh_cons (SCM_UNDEFINED, SCM_UNDEFINED));
 }
 
 
 
-
-Molecule
-Crescendo::get_symbol () const
+MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Crescendo,brew_molecule);
+SCM
+Crescendo::brew_molecule (SCM smob) 
 {
-  Real w_dim = extent (X_AXIS).length ();
-  Real absdyn_dim = paper_l ()-> get_realvar (ly_symbol ("crescendo_shorten"));
-  if (dyn_b_drul_[LEFT])
+  Score_element *me= unsmob_element (smob);
+  Spanner * sp = dynamic_cast<Spanner*>(me);
+  Real absdyn_dim = me->paper_l ()-> get_var ("crescendo_shorten");
+  Real extra_left =  sp->get_broken_left_end_align ();
+
+  SCM dir = me->get_elt_property("grow-direction");
+  SCM dyns = me->get_elt_property ("dynamic-drul");
+
+  if (!isdir_b (dir) || !gh_pair_p (dyns))
     {
-      w_dim -= absdyn_dim;
+      me->suicide ();
+      return SCM_EOL;
     }
-  if (dyn_b_drul_[RIGHT])
+  
+  Direction gd = to_dir (dir);
+
+  bool dynleft= unsmob_element (gh_car (dyns));
+  bool dynright = unsmob_element (gh_cdr (dyns));
+  
+  if (dynleft)
+    extra_left += absdyn_dim;
+
+  Real width = sp->spanner_length()- sp->get_broken_left_end_align ();
+
+  if (dynleft)
+    {
+      width -= absdyn_dim;
+    }
+  if (dynright)
     {
-      w_dim -= absdyn_dim;
+      width -= absdyn_dim;
     }
 
-  if (w_dim < 0)
+  if (width < 0)
     {
       warning (_ ("crescendo") + " " + _ ("too small"));
-      w_dim = 0;
+      width = 0;
     }
 
   Drul_array<bool> broken;
   Direction d = LEFT;
-  do {
-    Score_column* s = dynamic_cast<Score_column*>(spanned_drul_[d]); // UGH
-    broken[d] = (!s->musical_b ());
-  } while (flip (&d) != LEFT);
+  do
+    {
+      Paper_column* s = dynamic_cast<Paper_column*>(sp->get_bound (d)); // UGH
+      broken[d] = (!s->musical_b ());
+    }
+  while (flip (&d) != LEFT);
+  
+ 
+  Molecule m;
   
+  Real pad = 0;
+  SCM s = me->get_elt_property ("start-text");
+  if (gh_string_p (s))
+    {
+      Molecule start_text (me->lookup_l ()->text ("italic",
+                                             ly_scm2string (s),
+                                                 me->paper_l ()));
+      m.add_molecule (start_text);
 
-  bool continued = broken[Direction (-grow_dir_)];
-  return Molecule (lookup_l ()->hairpin (w_dim, grow_dir_ < 0, continued));
-}
+      pad = me->paper_l ()->get_var ("interline") / 2;
 
-Molecule*
-Crescendo::do_brew_molecule_p () const
-{
-  Molecule* m_p =0;
-  Real absdyn_dim = paper_l ()-> get_realvar (ly_symbol ("crescendo_shorten"));
-  Real x_off_dim=0.0;
-  if (dyn_b_drul_[LEFT])
-    x_off_dim += absdyn_dim;
-
-  m_p = new Molecule;
-  Molecule s (get_symbol ());
-  m_p->add_molecule (s);
-  m_p->translate_axis (x_off_dim, X_AXIS);
-  return m_p;
+      width -= start_text.extent (X_AXIS).length ();
+      width -= pad;
+      width = width >? 0;
+    }
+
+  SCM at;
+  s =me->get_elt_property ("spanner");
+  Real height;
+  if (gh_string_p (s) && ly_scm2string (s) == "dashed-line")
+    {
+      Real thick = me->paper_l ()->get_var ("crescendo_dash_thickness");
+      Real dash = me->paper_l ()->get_var ("crescendo_dash");
+      height = thick;
+      at = gh_list (ly_symbol2scm (ly_scm2string (s).ch_C ()),
+                   gh_double2scm (thick),
+                   gh_double2scm (dash),
+                   gh_double2scm (width),
+                   SCM_UNDEFINED);
+    }
+  else
+    {
+      bool continued = broken[Direction (-gd)];
+      height = me->paper_l()->get_var ("crescendo_height");
+      Real thick = me->paper_l ()->get_var ("crescendo_thickness");
+      
+      const char* hairpin = (gd < 0)? "decrescendo" :  "crescendo";
+
+      at = gh_list (ly_symbol2scm (hairpin),
+                   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 span (b, at);
+
+  m.add_at_edge (X_AXIS, RIGHT, span, pad);
+  m.translate_axis (extra_left, X_AXIS);
+
+  return m.create_scheme ();
 }