release: 1.3.28

[lilypond.git] / lily / molecule.cc

diff --git a/lily/molecule.cc b/lily/molecule.cc
index 75e05f09958cb56cdf9ed0b0d1b68a7f6bc0f57c..f447d542d6e44738d8e117eebf5bca1addc56668 100644 (file)
--- a/lily/molecule.cc
+++ b/lily/molecule.cc
@@ -3,17 +3,23 @@
 
   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>
 */
 
+/*
+  ugh. Rewrite not finished yet. Still must copy atom lists.
+ */
+
+#include <math.h>
+
 #include "interval.hh"
 #include "string.hh"
 #include "molecule.hh"
 #include "atom.hh"
 #include "debug.hh"
-
 #include "killing-cons.tcc"
 
+
 Box
 Molecule::extent() const
 {
@@ -29,99 +35,138 @@ Molecule::extent(Axis a) const
 void
 Molecule::translate (Offset o)
 {
-  for (Cons<Atom> *  ptr = atom_list_; ptr; ptr = ptr->next_)
+  if (isinf (o.length ()))
     {
-      ptr->car_->off_ += o;
+      programming_error ("Translating infinitely. Ignore.");
+      return;
     }
-  dim_.translate (o);
+    
+  for (SCM ptr = gh_cdr (atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
+    {
+      gh_set_car_x (ptr, translate_atom (o, gh_car (ptr)));
+    }
+  if (!empty_b ())
+    dim_.translate (o);
 }
 
 void
 Molecule::translate_axis (Real x,Axis a)
 {
-  for (Cons<Atom> *  ptr = atom_list_; ptr; ptr = ptr->next_)
-      ptr->car_->off_[a] += x;
+  if (isinf (x))
+    {
+      programming_error ("Translating infinitely. Ignore.");
+      return;
+    }
+  for (SCM ptr = gh_cdr (atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
+    {
+      gh_set_car_x (ptr, translate_atom_axis (x, a, gh_car (ptr)));
+    }
 
-  dim_[a] += x;
+  if (!dim_[a].empty_b ())
+    dim_[a] += x;
 }
 
 void
 Molecule::add_molecule (Molecule const &m)
 {
-  Cons_list<Atom> al;
-  copy_killing_cons_list (al, m.atom_list_);
-
-  if (al.head_)
+  for (SCM ptr = gh_cdr (m.atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
     {
-      *al.tail_ = atom_list_;
-      atom_list_ = al.head_;
-      al.head_ =0;
+      add_atom (gh_car (ptr));
     }
   dim_.unite (m.dim_);
 }
 
 void
-Molecule::add_atom (Atom const *al)
+Molecule::add_atom (SCM atomsmob)
 {
-  Atom *a = new Atom(*al);
-
-  atom_list_ = new Killing_cons<Atom> (a, atom_list_);
+  gh_set_cdr_x (atom_list_,
+               gh_cons  (atomsmob, gh_cdr (atom_list_)));
 }
 
 void
 Molecule::operator=(Molecule const & src)
 {
-  if (&src == this) return;
-  delete atom_list_;
-  atom_list_ = 0;
-  dim_= src.dim_;
-  add_molecule (src);
-}
+  if (&src == this)
+    return;
 
-Molecule::Molecule (Molecule const &s)
-{
-  atom_list_ = 0;
-  add_molecule (s);
+  atom_list_ = gh_cons (SCM_EOL,scm_list_copy (gh_cdr (src.atom_list_)));
+  dim_= src.dim_;
 }
 
-Molecule::~Molecule ()
+void
+Molecule::set_empty (bool e)
 {
-  delete atom_list_;
+  if (e)
+    {
+      dim_[X_AXIS].set_empty ();
+      dim_[Y_AXIS].set_empty ();
+    }
+  else
+    {
+      dim_[X_AXIS] = Interval(0,0);
+      dim_[Y_AXIS] = Interval (0,0);
+    }
 }
 
 void
-Molecule::print() const
+Molecule::print () const
 {
 #ifndef NPRINT
-  if (! check_debug)
-    return;
-  DOUT << "dim:";
-  for (Axis i=X_AXIS; i < NO_AXES; incr (i))
-    DOUT << axis_name_str (i) << " = " << dim_[i].str ();
+  for (SCM ptr = gh_cdr (atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
+    gh_display (gh_car (ptr));
 #endif
 }
 
+Molecule::Molecule (Molecule const &s)
+{
+  atom_list_ = gh_cons (SCM_EOL, scm_list_copy (gh_cdr (s.atom_list_)));
+  dim_ = s.dim_;
+}
+
+Molecule::~Molecule ()
+{
+}
+
+
 void
-Molecule::do_center (Axis a)
+Molecule::align_to (Axis a, Direction d)
 {
-  Interval i (extent (a));
-  translate_axis (-i.center (), a);
+  if (d == CENTER)
+    {
+      Interval i (extent (a));
+      translate_axis (-i.center (), a);
+    }
+  else
+    {
+      translate_axis (-extent (a)[d], a);
+    }
 }
 
 Molecule::Molecule ()
 {
-  dim_ = Box (Interval(0,0),Interval( 0,0  ));
-  atom_list_ = 0;
+  dim_[X_AXIS].set_empty ();
+  dim_[Y_AXIS].set_empty ();
+  atom_list_ = gh_cons (SCM_EOL, SCM_EOL);
 }
 
 
 void
 Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
 {
-  Real my_extent= dim_[a][d];
+  Real my_extent= empty_b () ? 0.0 : dim_[a][d];
+  Interval i (m.extent ()[a]);
+  if (i.empty_b ())
+    programming_error ("Molecule::add_at_edge: adding empty molecule.");
   
-  Real offset = my_extent -  m.extent ()[a][-d];
+  Real his_extent = i[-d];
+  Real offset = my_extent -  his_extent;
   Molecule toadd (m);
   toadd.translate_axis (offset + d * padding, a);
   add_molecule (toadd);
 }
+
+bool
+Molecule::empty_b () const
+{
+  return gh_cdr (atom_list_) == SCM_EOL;
+}