lily/translator-group-initializer.cc

   1         /*
   2   translator-group-initializer.cc --  implement Translator_group_initializer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "translator-group.hh"
  11 #include "warn.hh"
  12
  13
  14 void
  15 Translator_group_initializer::set_acceptor (Translator *me,SCM name, bool add)
  16 {
  17   if (add)
  18     me->accepts_name_list_ = gh_append2 (me->accepts_name_list_, gh_cons (name, SCM_EOL));
  19   else
  20     me->accepts_name_list_ = scm_delete_x (name, me->accepts_name_list_);
  21 }
  22
  23
  24 SCM
  25 Translator_group_initializer::modify_definition (SCM list, SCM str, bool add)
  26 {
  27   String s = ly_scm2string (str);
  28   if (!get_translator_l (s))
  29     error (_ ("Program has no such type"));
  30
  31   if (add)
  32     {
  33       if (scm_memq (str, list) != SCM_BOOL_F)
  34         {
  35           warning (_f("Already contains: `%s'", s));
  36           warning (_f("Not adding translator: `%s'", s));
  37         }
  38       else
  39         list= gh_cons (str, list);
  40     }
  41   else
  42     {
  43       list = scm_delete_x (str, list);
  44     }
  45   return list;
  46 }
  47
  48
  49
  50 void
  51 Translator_group_initializer::remove_element (Translator *me,SCM s)
  52 {
  53   me->end_consists_name_list_ = modify_definition (me->end_consists_name_list_, s, false);
  54   me->consists_name_list_ = modify_definition (me->consists_name_list_, s, false);
  55 }
  56
  57 void
  58 Translator_group_initializer::add_element (Translator *me,SCM s)
  59 {
  60   me->consists_name_list_ = modify_definition (me->consists_name_list_, s, true);
  61 }
  62
  63 void
  64 Translator_group_initializer::add_last_element (Translator *me,SCM s)
  65 {
  66   me->end_consists_name_list_ = modify_definition (me->end_consists_name_list_, s, true);
  67 }
  68 void
  69 Translator_group_initializer::add_push_property (Translator * me,
  70                                                  SCM props, SCM syms,  SCM vals)
  71 {
  72   me->property_pushes_ = gh_cons (gh_list (props, syms, vals, SCM_UNDEFINED),
  73                                   me->property_pushes_);
  74 }
  75
  76 void
  77 Translator_group_initializer::add_pop_property (Translator * me,
  78                                                  SCM props, SCM syms)
  79 {
  80   me->property_pushes_ = gh_cons (gh_list (props, syms, SCM_UNDEFINED),
  81                                   me->property_pushes_);
  82 }
  83
  84 /*
  85   Do it. SYMS maybe a symbol or a list of symbols. VAL is
  86   SCM_UNDEFINED in case of a pop
  87 */
  88 void
  89 Translator_group_initializer::apply_pushpop_property (Translator *trans, SCM syms, SCM eprop, SCM val)
  90 {
  91   if (gh_symbol_p (syms))
  92     dynamic_cast<Translator_group*>(trans)->execute_single_pushpop_property (syms, eprop, val);
  93   else for (SCM s = syms; gh_pair_p (s); s = gh_cdr (s))
  94     dynamic_cast<Translator_group*>(trans)->execute_single_pushpop_property (gh_car (s), eprop, val);
  95 }