release: 0.1.47

[lilypond.git] / lily / abbrev.cc

diff --git a/lily/abbrev.cc b/lily/abbrev.cc
new file mode 100644 (file)
index 0000000..d91899c
--- /dev/null
+++ b/lily/abbrev.cc
@@ -0,0 +1,99 @@
+/*   
+  abbrev.cc --  implement Abbreviation
+  
+  source file of the GNU LilyPond music typesetter
+  
+  (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+  
+ */
+
+#include "abbrev.hh"
+#include "debug.hh"
+#include "beam.hh"
+#include "paper-def.hh"
+#include "lookup.hh"
+#include "stem.hh"
+#include "dimen.hh"
+
+Abbreviation::Abbreviation ()
+{
+  stem_l_ = 0;
+  abbrev_flags_i_ = 1;
+}
+
+void
+Abbreviation::do_print () const
+{
+  DOUT << "abbrev_flags_i_ " << abbrev_flags_i_;
+}
+
+Molecule*
+Abbreviation::brew_molecule_p () const
+{
+  Real dy = paper ()->interbeam_f ();
+  Real w = 1.5 * paper ()->lookup_l ()->ball (2).dim_.x ().length ();
+  Real interline_f = paper ()->interline_f ();
+  Real beamdy = interline_f/2;
+
+  int beams_i = 0;
+  Real slope_f = paper ()->internote_f () / 4;
+
+  if (stem_l_ && stem_l_->beam_l_) {
+    // huh?
+    slope_f = 2 * stem_l_->beam_l_->slope_f_;
+    // ugh, rather calc from Abbreviation_req
+    beams_i = stem_l_->beams_right_i_ >? stem_l_->beams_left_i_;
+  }
+  paper ()->lookup_l ()->beam (slope_f, 20 PT, 1 PT);
+
+  Atom a (paper ()->lookup_l ()->beam (slope_f, w, .48 * interline_f));
+  a.translate (Offset (-w/2, w / 2 * slope_f));
+
+  Molecule *beams= new Molecule; 
+  for (int i = 0; i < abbrev_flags_i_; i++)
+    {
+      Atom b (a);
+      b.translate_axis (dy * i, Y_AXIS);
+      beams->add (b);
+    }
+  beams->translate_axis (-beams->extent ()[Y_AXIS].center (), Y_AXIS);
+
+  if (stem_l_)
+    {
+      /* Try to be in the middle of the open part of the stem and
+        between on the staff.
+
+        (urgh)
+      */
+      Direction sd  = stem_l_->dir_;
+      Interval empty_stem (stem_l_->chord_start_f () * sd ,
+                          (stem_l_->stem_end_f ()* sd) - beams_i * dy);
+      empty_stem *= sd;
+      
+      Interval instaff = empty_stem;
+      instaff.intersect (interline_f * Interval (-2,2));
+      if (instaff.empty_b ())
+       instaff = empty_stem;
+
+      instaff.print (); 
+      beams->translate (Offset(stem_l_->hpos_f () - hpos_f (),
+                         instaff.center ()));
+    }
+  
+  return beams;
+}
+
+void
+Abbreviation::do_substitute_dependent (Score_elem*o, Score_elem*n)
+{
+  if (stem_l_ == o)
+    stem_l_ = n ? (Stem*)n->item () : 0;
+}
+
+
+void
+Abbreviation::set_stem (Stem *s)
+{
+  stem_l_ = s;
+  add_dependency (s);
+}