lily/translator-group.cc

   1 /*
   2   Translator_group.cc -- implement Translator_group
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "music-output-def.hh"
  10 #include "translator-group.hh"
  11 #include "translator.hh"
  12 #include "warn.hh"
  13 #include "moment.hh"
  14 #include "scm-hash.hh"
  15 #include "context-def.hh"
  16 #include "context.hh"
  17 #include "main.hh"
  18 #include "music.hh"
  19
  20 Translator_group*
  21 Translator_group::get_daddy_translator () const
  22 {
  23   Translator *t
  24     = unsmob_translator (daddy_context_->daddy_context_->implementation_);
  25   return dynamic_cast<Translator_group*> (t);
  26 }
  27
  28
  29 void
  30 translator_each (SCM list, Translator_method method)
  31 {
  32   for (SCM p = list; gh_pair_p (p); p = ly_cdr (p))
  33     (unsmob_translator (ly_car (p))->*method) ();
  34 }
  35
  36
  37 void
  38 Translator_group::initialize ()
  39 {
  40   SCM tab = scm_make_vector (gh_int2scm (19), SCM_BOOL_F);
  41   daddy_context_->set_property ("acceptHashTable", tab);
  42 }
  43
  44
  45 bool
  46 translator_accepts_any_of (Translator*tr, SCM ifaces)
  47 {
  48   SCM ack_ifs = scm_assoc (ly_symbol2scm ("events-accepted"),
  49                            tr->translator_description ());
  50   ack_ifs = gh_cdr (ack_ifs);
  51   for (SCM s = ifaces; ly_pair_p (s); s = ly_cdr (s))
  52     if (scm_c_memq (ly_car (s), ack_ifs) != SCM_BOOL_F)
  53       return true;
  54   return false;
  55 }
  56
  57 SCM
  58 find_accept_translators (SCM gravlist, SCM ifaces)
  59 {
  60   SCM l = SCM_EOL;
  61   for (SCM s = gravlist; ly_pair_p (s);  s = ly_cdr (s))
  62     {
  63       Translator* tr = unsmob_translator (ly_car (s));
  64       if (translator_accepts_any_of (tr, ifaces))
  65         l = scm_cons (tr->self_scm (), l);
  66     }
  67   l = scm_reverse_x (l, SCM_EOL);
  68
  69   return l;
  70 }
  71
  72 bool
  73 Translator_group::try_music (Music* m)
  74 {
  75   SCM tab = get_property ("acceptHashTable");
  76   SCM name = scm_sloppy_assq (ly_symbol2scm ("name"),
  77                               m->get_property_alist (false));
  78
  79   if (!gh_pair_p (name))
  80     return false;
  81
  82   name = gh_cdr (name);
  83   SCM accept_list = scm_hashq_ref (tab, name, SCM_UNDEFINED);
  84   if (accept_list == SCM_BOOL_F)
  85     {
  86       accept_list = find_accept_translators (get_simple_trans_list (),
  87                                              m->get_property ("types"));
  88       scm_hashq_set_x (tab, name, accept_list);
  89     }
  90
  91   for (SCM p = accept_list; gh_pair_p (p); p = ly_cdr (p))
  92     {
  93       Translator * t = unsmob_translator (ly_car (p));
  94       if (t && t->try_music (m))
  95         return true;
  96     }
  97   return false;
  98 }
  99
 100 SCM
 101 names_to_translators (SCM namelist, Context*tg)
 102 {
 103   SCM l = SCM_EOL;
 104   for (SCM s = namelist; gh_pair_p (s) ; s = ly_cdr (s))
 105     {
 106       Translator * t = get_translator (ly_car (s));
 107       if (!t)
 108         warning (_f ("can't find: `%s'", s));
 109       else
 110         {
 111           Translator * tr = t->clone ();
 112           SCM str = tr->self_scm ();
 113           l = gh_cons (str, l);
 114
 115           tr->daddy_context_ = tg;
 116           scm_gc_unprotect_object (str);
 117         }
 118     }
 119   return l;
 120 }
 121
 122
 123 SCM
 124 Translator_group::get_simple_trans_list ()
 125 {
 126   return simple_trans_list_;
 127 }
 128
 129 void
 130 recurse_over_translators (Context * c, Translator_method ptr, Direction dir)
 131 {
 132   Translator_group * tg
 133     = dynamic_cast<Translator_group*> (unsmob_translator (c->implementation_));
 134
 135
 136   /*
 137     Top down:
 138    */
 139   if (dir == DOWN)
 140     {
 141       translator_each (tg->get_simple_trans_list (),
 142                           ptr);
 143
 144       (tg->*ptr) ();
 145     }
 146
 147   for (SCM s = c->context_list_ ; gh_pair_p (s);
 148        s =gh_cdr (s))
 149     {
 150       recurse_over_translators (unsmob_context (gh_car (s)), ptr, dir);
 151     }
 152
 153   if (dir == UP)
 154     {
 155       translator_each (tg->get_simple_trans_list (),
 156                      ptr);
 157
 158       (tg->*ptr) ();
 159     }
 160 }