lily/output-def.cc

   1 /*
   2   music-output-def.cc -- implement Output_def
   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
  10 #include "context-def.hh"
  11 #include "file-path.hh"
  12 #include "global-context.hh"
  13 #include "lily-guile.hh"
  14 #include "ly-module.hh"
  15 #include "main.hh"
  16 #include "output-def.hh"
  17 #include "output-def.hh"
  18 #include "scm-hash.hh"
  19 #include "warn.hh"
  20
  21 #include "ly-smobs.icc"
  22
  23 Output_def::Output_def ()
  24 {
  25   scope_ = SCM_EOL;
  26   parent_ = 0;
  27   smobify_self ();
  28
  29   scope_ = ly_make_anonymous_module (false);
  30 }
  31
  32 Output_def::~Output_def ()
  33 {
  34 }
  35
  36 Output_def::Output_def (Output_def const &s)
  37 {
  38   scope_ = SCM_EOL;
  39   parent_ = 0;
  40   smobify_self ();
  41
  42   input_origin_ = s.input_origin_;
  43   scope_= ly_make_anonymous_module (false);
  44   if (ly_c_module_p (s.scope_))
  45     ly_import_module (scope_, s.scope_);
  46 }
  47
  48
  49 IMPLEMENT_SMOBS (Output_def);
  50 IMPLEMENT_DEFAULT_EQUAL_P (Output_def);
  51
  52
  53 SCM
  54 Output_def::mark_smob (SCM m)
  55 {
  56   Output_def * mo = (Output_def*) SCM_CELL_WORD_1 (m);
  57
  58   /*
  59     FIXME: why is this necessary?
  60     all bookpaper_ should be protected by themselves.
  61   */
  62   if (mo->parent_)
  63     scm_gc_mark (mo->parent_->self_scm ());
  64
  65
  66   mo->derived_mark ();
  67   return mo->scope_;
  68 }
  69
  70 void
  71 Output_def::derived_mark () {}
  72
  73 void
  74 assign_context_def (Output_def * m, SCM transdef)
  75 {
  76   Context_def *tp = unsmob_context_def (transdef);
  77   assert (tp);
  78
  79   if (tp)
  80     {
  81       SCM sym = tp->get_context_name ();
  82       scm_module_define (m->scope_, sym, transdef);
  83     }
  84 }
  85
  86 /*
  87   find the translator for NAME. NAME must be a symbol.
  88 */
  89 SCM
  90 find_context_def (Output_def const *m, SCM name)
  91 {
  92   Context_def *cd = unsmob_context_def (m->lookup_variable (name));
  93   return cd ? cd->self_scm () : SCM_EOL;
  94 }
  95
  96 int
  97 Output_def::print_smob (SCM s, SCM p, scm_print_state *)
  98 {
  99   Output_def * def = unsmob_output_def (s);
 100   scm_puts ("#< ", p);
 101   scm_puts (classname (def), p);
 102
 103   (void)def;
 104   scm_puts (">", p);
 105   return 1;
 106 }
 107
 108 Real
 109 Output_def::get_dimension (SCM s) const
 110 {
 111   SCM val = lookup_variable (s);
 112   return ly_scm2double (val);
 113 }
 114
 115
 116 SCM
 117 Output_def::lookup_variable (SCM sym) const
 118 {
 119   SCM var = ly_module_lookup (scope_, sym);
 120   if (SCM_VARIABLEP (var) && SCM_VARIABLE_REF(var) != SCM_UNDEFINED)
 121     return SCM_VARIABLE_REF (var);
 122
 123   if (parent_)
 124     return parent_->lookup_variable (sym);
 125
 126   return SCM_EOL;
 127 }
 128
 129 SCM
 130 Output_def::c_variable (String s) const
 131 {
 132   return lookup_variable (ly_symbol2scm (s.to_str0 ()));
 133 }
 134
 135 void
 136 Output_def::set_variable (SCM sym, SCM val)
 137 {
 138   scm_module_define (scope_, sym, val);
 139 }
 140
 141 LY_DEFINE (ly_paper_lookup, "ly:output-def-lookup",
 142            2, 0, 0, (SCM pap, SCM sym),
 143            "Lookup @var{sym} in @var{pap}. "
 144            "Return the value or @code{'()} if undefined.")
 145 {
 146   Output_def *op = unsmob_output_def (pap);
 147   SCM_ASSERT_TYPE (op, pap, SCM_ARG1, __FUNCTION__, "Output_def");
 148   SCM_ASSERT_TYPE (ly_c_symbol_p (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
 149
 150   return op->lookup_variable (sym);
 151 }
 152
 153 LY_DEFINE (ly_output_def_scope, "ly:output-def-scope",
 154            1, 0,0, (SCM def),
 155            "Get the variable scope inside @var{def}.")
 156 {
 157   Output_def *op = unsmob_output_def (def);
 158   SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
 159   return op->scope_;
 160 }
 161
 162
 163 LY_DEFINE (ly_output_def_parent, "ly:output-def-parent",
 164            1, 0, 0, (SCM def),
 165            "Get the parent output-def of @var{def}.")
 166 {
 167   Output_def *op = unsmob_output_def (def);
 168   SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
 169   return op->parent_ ? op->parent_->self_scm () : SCM_EOL;
 170 }
 171
 172
 173 LY_DEFINE (ly_output_def_clone, "ly:output-def-clone",
 174            1, 0, 0, (SCM def),
 175            "Clone @var{def}.")
 176 {
 177   Output_def *op = unsmob_output_def (def);
 178   SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
 179   SCM s = op->clone ()->self_scm ();
 180   scm_gc_unprotect_object (s);
 181   return s;
 182 }
 183
 184 LY_DEFINE(ly_output_description, "ly:output-description",
 185           1,0,0,
 186           (SCM output_def),
 187           "Return the description of translators in @var{output-def}.")
 188 {
 189   Output_def *id = unsmob_output_def (output_def);
 190
 191   SCM al =ly_module_to_alist (id->scope_);
 192
 193   SCM l = SCM_EOL;
 194   for (SCM s = al ; ly_c_pair_p (s); s = ly_cdr (s))
 195     {
 196       Context_def * td = unsmob_context_def (ly_cdar (s));
 197       SCM key = ly_caar (s);
 198       if (td && key == td->get_context_name ())
 199         {
 200
 201           l = scm_cons (scm_cons (key, td->to_alist ()),  l);
 202         }
 203     }
 204   return l;
 205 }
 206
 207
 208
 209 #include "interval.hh"
 210
 211 /* FIXME.  This is broken until we have a generic way of
 212    putting lists inside the \paper block.  */
 213 Interval
 214 line_dimensions_int (Output_def *def, int n)
 215 {
 216   Real lw =  def->get_dimension (ly_symbol2scm ("linewidth"));
 217   Real ind = n ? 0.0 : def->get_dimension (ly_symbol2scm ("indent"));
 218
 219   return Interval (ind, lw);
 220 }
 221
 222 LY_DEFINE (ly_paper_def_p, "ly:paper-def?",
 223            1, 0, 0, (SCM def),
 224            "Is @var{def} a paper definition?")
 225 {
 226   return ly_bool2scm (unsmob_output_def (def));
 227 }
 228
 229
 230
 231 LY_DEFINE (ly_bookpaper_outputscale, "ly:bookpaper-outputscale",
 232           1, 0, 0,
 233           (SCM bp),
 234           "Get outputscale for BP.")
 235 {
 236   Output_def *b = unsmob_output_def (bp);
 237   SCM_ASSERT_TYPE (b, bp, SCM_ARG1, __FUNCTION__, "bookpaper");
 238   return scm_make_real (output_scale (b));
 239 }
 240
 241
 242
 243 LY_DEFINE (ly_make_output_def, "ly:make-output-def",
 244            0, 0, 0, (),
 245            "Make a output def.")
 246 {
 247   Output_def *bp = new Output_def ;
 248   return scm_gc_unprotect_object (bp->self_scm ());
 249 }
 250