lily/molecule.cc

   1 /*
   2   molecule.cc -- implement Molecule
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 /*
  10   ugh. Rewrite not finished yet. Still must copy atom lists.
  11  */
  12
  13 #include <math.h>
  14
  15 #include "interval.hh"
  16 #include "string.hh"
  17 #include "molecule.hh"
  18 #include "atom.hh"
  19 #include "debug.hh"
  20 #include "killing-cons.tcc"
  21
  22
  23 Box
  24 Molecule::extent() const
  25 {
  26   return dim_;
  27 }
  28
  29 Interval
  30 Molecule::extent(Axis a) const
  31 {
  32   return dim_[a];
  33 }
  34
  35 void
  36 Molecule::translate (Offset o)
  37 {
  38   if (isinf (o.length ()))
  39     {
  40       programming_error ("Translating infinitely. Ignore.");
  41       return;
  42     }
  43
  44   for (SCM ptr = gh_cdr (atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
  45     {
  46       gh_set_car_x (ptr, translate_atom (o, gh_car (ptr)));
  47     }
  48   if (!empty_b ())
  49     dim_.translate (o);
  50 }
  51
  52 void
  53 Molecule::translate_axis (Real x,Axis a)
  54 {
  55   if (isinf (x))
  56     {
  57       programming_error ("Translating infinitely. Ignore.");
  58       return;
  59     }
  60   for (SCM ptr = gh_cdr (atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
  61     {
  62       gh_set_car_x (ptr, translate_atom_axis (x, a, gh_car (ptr)));
  63     }
  64
  65   if (!dim_[a].empty_b ())
  66     dim_[a] += x;
  67 }
  68
  69 void
  70 Molecule::add_molecule (Molecule const &m)
  71 {
  72   for (SCM ptr = gh_cdr (m.atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
  73     {
  74       add_atom (gh_car (ptr));
  75     }
  76   dim_.unite (m.dim_);
  77 }
  78
  79 void
  80 Molecule::add_atom (SCM atomsmob)
  81 {
  82   gh_set_cdr_x (atom_list_,
  83                 gh_cons  (atomsmob, gh_cdr (atom_list_)));
  84 }
  85
  86 void
  87 Molecule::operator=(Molecule const & src)
  88 {
  89   if (&src == this)
  90     return;
  91
  92   atom_list_ = gh_cons (SCM_EOL,scm_list_copy (gh_cdr (src.atom_list_)));
  93   dim_= src.dim_;
  94 }
  95
  96 void
  97 Molecule::set_empty (bool e)
  98 {
  99   if (e)
 100     {
 101       dim_[X_AXIS].set_empty ();
 102       dim_[Y_AXIS].set_empty ();
 103     }
 104   else
 105     {
 106       dim_[X_AXIS] = Interval(0,0);
 107       dim_[Y_AXIS] = Interval (0,0);
 108     }
 109 }
 110
 111 void
 112 Molecule::print () const
 113 {
 114 #ifndef NPRINT
 115   for (SCM ptr = gh_cdr (atom_list_);  ptr != SCM_EOL; ptr = gh_cdr(ptr))
 116     gh_display (gh_car (ptr));
 117 #endif
 118 }
 119
 120 Molecule::Molecule (Molecule const &s)
 121 {
 122   atom_list_ = gh_cons (SCM_EOL, scm_list_copy (gh_cdr (s.atom_list_)));
 123   dim_ = s.dim_;
 124 }
 125
 126 Molecule::~Molecule ()
 127 {
 128 }
 129
 130
 131 void
 132 Molecule::align_to (Axis a, Direction d)
 133 {
 134   if (d == CENTER)
 135     {
 136       Interval i (extent (a));
 137       translate_axis (-i.center (), a);
 138     }
 139   else
 140     {
 141       translate_axis (-extent (a)[d], a);
 142     }
 143 }
 144
 145 Molecule::Molecule ()
 146 {
 147   dim_[X_AXIS].set_empty ();
 148   dim_[Y_AXIS].set_empty ();
 149   atom_list_ = gh_cons (SCM_EOL, SCM_EOL);
 150 }
 151
 152
 153 void
 154 Molecule::add_at_edge (Axis a, Direction d, Molecule const &m, Real padding)
 155 {
 156   Real my_extent= empty_b () ? 0.0 : dim_[a][d];
 157   Interval i (m.extent ()[a]);
 158   if (i.empty_b ())
 159     programming_error ("Molecule::add_at_edge: adding empty molecule.");
 160
 161   Real his_extent = i[-d];
 162   Real offset = my_extent -  his_extent;
 163   Molecule toadd (m);
 164   toadd.translate_axis (offset + d * padding, a);
 165   add_molecule (toadd);
 166 }
 167
 168 bool
 169 Molecule::empty_b () const
 170 {
 171   return gh_cdr (atom_list_) == SCM_EOL;
 172 }