release: 1.1.41

[lilypond.git] / lily / key-item.cc

diff --git a/lily/key-item.cc b/lily/key-item.cc
index 783572b0936f4ea2fd7e9807df553441248bc425..a3b646b0e5048710f68dbc36cd83ef394d3a86b9 100644 (file)
--- a/lily/key-item.cc
+++ b/lily/key-item.cc
@@ -1,72 +1,141 @@
+/*
+  key-item.cc -- implement Key_item
+
+  source file of the GNU LilyPond music typesetter
+
+  (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+
+  keyplacement by Mats Bengtsson
+*/
+
 #include "key-item.hh"
 #include "key.hh"
 #include "debug.hh"
 #include "molecule.hh"
 #include "paper-def.hh"
 #include "lookup.hh"
-//#include "clef-reg.hh"
-#include "key-reg.hh"
+#include "musical-pitch.hh"
 
 const int FLAT_TOP_PITCH=2; /* fes,ges,as and bes typeset in lower octave */
 const int SHARP_TOP_PITCH=4; /*  ais and bis typeset in lower octave */
 
+Key_item::Key_item ()
+{
+  multi_octave_b_ = false;
+  set_elt_property (breakable_scm_sym, SCM_BOOL_T);
+  set_c_position (0);
+}
+
+int
+Key_item::get_c_position () const
+{
+  // Find the c in the range -4 through 2
+  int from_bottom_pos = c0_position_ + 4;      
+  from_bottom_pos = from_bottom_pos%7;
+  from_bottom_pos = (from_bottom_pos + 7)%7; // Precaution to get positive.
+  return from_bottom_pos - 4;
+}
 
 
-Key_item::Key_item(int c)
+void 
+Key_item::set_c_position (int c0)
 {
-    set_c_position(c);
+  c0_position_ = c0;
 }
 
+
 void
-Key_item::read(Key_register const & key_reg_r)
+Key_item::add (int p, int a)
 {
-    assert(!key_reg_r.key_.multi_octave_b_);
-    const Array<int> &idx_arr =key_reg_r.accidental_idx_arr_; 
-    for (int i = 0 ; i< idx_arr.size(); i++) {
-       int note = idx_arr[i];
-       int acc = ((Key &) key_reg_r.key_).oct(0).acc(note);
-
-       add(note, acc);
-    }
+  pitch_arr_.push (p);
+  acc_arr_.push (a);
 }
 
-void 
-Key_item::set_c_position(int c0)
+void
+Key_item::add_old (int p, int a)
 {
-    int octaves =(abs(c0) / 7) +1 ;
-    c_position=(c0 + 7*octaves)%7;
+  old_pitch_arr_.push (p);
+  old_acc_arr_.push (a);
 }
 
 
-void
-Key_item::add(int p, int a)
+int
+Key_item::calculate_position(int p, int a) const
 {
-    if ((a<0 && p>FLAT_TOP_PITCH) ||
-        (a>0 && p>SHARP_TOP_PITCH)) {
-      p -= 7; /* Typeset below c_position */
+  if (multi_octave_b_) 
+    {
+      return p + c0_position_;
     }
-    pitch.push(p);
-    acc.push(a);
+  else {
+    if ((a<0 && ((p>FLAT_TOP_PITCH) || (p+get_c_position ()>4)) && (p+get_c_position ()>1)) 
+       ||
+       (a>0 && ((p>SHARP_TOP_PITCH) || (p+get_c_position ()>5)) && (p+get_c_position ()>2))) 
+      {
+       p -= 7; /* Typeset below c_position */
+      }
+    return p + get_c_position ();
+  }
 }
 
-
+/*
+  TODO
+  - space the `natural' signs wider
+  - dehair this
+ */
 Molecule*
-Key_item::brew_molecule_p()const
+Key_item::do_brew_molecule_p() const
 {
-    Molecule*output = new Molecule;
-    Real inter = paper()->internote_f();
-    
-    for (int i =0; i < pitch.size(); i++) {
-       Symbol s= paper()->lookup_l()->accidental(acc[i]);
-       Atom a(s);
-       a.translate(Offset(0,(c_position + pitch[i]) * inter));
-       Molecule m(a);
-       output->add_right(m);   
+  Molecule*output = new Molecule;
+  Real inter = staff_line_leading_f ()/2.0;
+  
+  int j;
+  if ((break_status_dir () == LEFT || break_status_dir () == CENTER)
+      || old_pitch_arr_.size ())
+    {
+      for (int i =0; i < old_pitch_arr_.size(); i++) 
+        {
+          for (j =0; (j < pitch_arr_.size())
+                && (old_pitch_arr_[i] != pitch_arr_[j]); j++) 
+           ;
+         
+          if (j == pitch_arr_.size()
+             || (old_pitch_arr_[i] == pitch_arr_[j]
+                 && old_acc_arr_[i] != acc_arr_[j]))
+            {
+              Molecule m =lookup_l ()->accidental (0,false);
+              m.translate_axis (calculate_position(old_pitch_arr_[i], old_acc_arr_[i]) * inter, Y_AXIS);
+              output->add_at_edge (X_AXIS, RIGHT, m,0);        
+            }
+        }
+
+      /*
+       Add half a space between  cancellation and key sig.
+
+       As suggested by [Ross], p.148.
+       */
+      Interval x(0, inter);
+      Interval y(0,0);
+
+      output->add_at_edge (X_AXIS, RIGHT, lookup_l()->fill (Box(x,y)),0);
     }
-    Molecule m(paper()->lookup_l()->fill(Box(
-       Interval(0, paper()->note_width()),
-       Interval(0,0))));
-    output->add_right(m);
-    return output;
+ 
+  for (int i =0; i < pitch_arr_.size(); i++) 
+    {
+      Molecule m =lookup_l ()->accidental (acc_arr_[i],false);
+      m.translate_axis (calculate_position(pitch_arr_[i], acc_arr_[i]) * inter, Y_AXIS);
+      output->add_at_edge (X_AXIS, RIGHT, m, 0);
+    }
+
+  if (pitch_arr_.size()) 
+    {
+      Molecule m (lookup_l ()->fill (Box (
+                                         Interval (0, paper_l ()->note_width ()),
+                                         Interval (0,0))));
+      
+      output->add_at_edge (X_AXIS, RIGHT, m,0 );
+    }
+  return output;
 }
-IMPLEMENT_STATIC_NAME(Key_item);
+
+
+