release: 1.3.28

[lilypond.git] / lily / crescendo.cc

diff --git a/lily/crescendo.cc b/lily/crescendo.cc
index 29aa3ab84176b1e0f2105a157b47f627ec8bfb96..481d30bca713b4c7335cf3542176dfec5a55b89a 100644 (file)
--- a/lily/crescendo.cc
+++ b/lily/crescendo.cc
@@ -1,38 +1,98 @@
 /*
   crescendo.cc -- implement Crescendo
 
-  source file of the LilyPond music typesetter
+  source file of the GNU LilyPond music typesetter
 
-  (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
+#include "molecule.hh"
 #include "crescendo.hh"
 #include "lookup.hh"
+#include "dimensions.hh"
 #include "paper-def.hh"
+#include "debug.hh"
+#include "paper-column.hh"
+#include "atom.hh"
 
-Crescendo::Crescendo(int s)
+Crescendo::Crescendo ()
 {
-    staff_size_i_ = s;
-    grow_dir_i_ =0;
-    dir_i_ = -1 ;
+  set_elt_property ("dynamic-drul", gh_cons (SCM_BOOL_F, SCM_BOOL_F));
 }
 
-Spanner*
-Crescendo::do_break_at(PCol*, PCol*)const
-{
-    return new Crescendo(*this);
-}
 
 
 Molecule*
-Crescendo::brew_molecule_p() const return m_p ;
+Crescendo::do_brew_molecule_p () const
 {
-    m_p = new Molecule;
-    Real w_f = width().length();
-    Symbol s( paper()->lookup_l()->hairpin(w_f, grow_dir_i_ < 0) );
-    m_p->add(Atom(s));
-    int pos = (dir_i_ >0) ? staff_size_i_ + 4 : - 4 ;
-    m_p->translate(Offset(0,pos * paper()->internote()));
+  Real absdyn_dim = paper_l ()-> get_var ("crescendo_shorten");
+  Real extra_left =  get_broken_left_end_align ();
+
+  SCM dir = get_elt_property("grow-direction");
+  SCM dyns = get_elt_property ("dynamic-drul");
+
+  if (!isdir_b (dir) || !gh_pair_p (dyns))
+    {
+Crescendo * me = (Crescendo*)this;
+      me->set_elt_property ("transparent", SCM_BOOL_T);
+      return new Molecule;
+    }
+  
+  Direction gd = to_dir (dir);
+
+  bool dynleft= to_boolean (gh_car (dyns));
+  bool dynright = to_boolean (gh_cdr (dyns));
+  
+  if (dynleft)
+    extra_left += absdyn_dim;
+
+  
+
+  Real width = spanner_length()- get_broken_left_end_align ();
+
+  if (dynleft)
+    {
+      width -= absdyn_dim;
+    }
+  if (dynright)
+    {
+      width -= absdyn_dim;
+    }
+
+  if (width < 0)
+    {
+      warning (_ ("crescendo") + " " + _ ("too small"));
+      width = 0;
+    }
+
+  Drul_array<bool> broken;
+  Direction d = LEFT;
+  do {
+    Paper_column* s = dynamic_cast<Paper_column*>(spanned_drul_[d]); // UGH
+    broken[d] = (!s->musical_b ());
+  } while (flip (&d) != LEFT);
+  
+
+  bool continued = broken[Direction (-gd)];
+  Real height = paper_l()->get_var ("crescendo_height");
+  Real thick = paper_l ()->get_var ("crescendo_thickness");
+
+  const char* hairpin = (gd < 0)? "decrescendo" :  "crescendo";
+  Molecule * m
+    = new Molecule;
+  m->dim_.x () = Interval (0, width);
+  m->dim_.y () = Interval (-2*height, 2*height);
+
+  SCM at = gh_list (ly_symbol2scm (hairpin),
+                    gh_double2scm (thick),
+                    gh_double2scm (width),
+                    gh_double2scm (height),
+                    gh_double2scm (continued ? height/2 : 0.0),
+                    SCM_UNDEFINED);
+
+  m->add_atom (at);
+  m->translate_axis (extra_left, X_AXIS);
+  return m;
 }
 
-IMPLEMENT_STATIC_NAME(Crescendo);
+