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--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "output-def.hh"
  10
  11 #include "context-def.hh"
  12 #include "file-path.hh"
  13 #include "global-context.hh"
  14 #include "interval.hh"
  15 #include "main.hh"
  16 #include "output-def.hh"
  17 #include "scm-hash.hh"
  18 #include "warn.hh"
  19
  20 #include "ly-smobs.icc"
  21
  22 #include "program-option.hh"
  23
  24 #include "string-convert.hh"
  25
  26 Output_def::Output_def ()
  27 {
  28   scope_ = SCM_EOL;
  29   parent_ = 0;
  30
  31   smobify_self ();
  32
  33   scope_ = ly_make_anonymous_module (false);
  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_is_module (s.scope_))
  45     ly_module_copy (scope_, s.scope_);
  46 }
  47
  48 Output_def::~Output_def ()
  49 {
  50 }
  51
  52 IMPLEMENT_SMOBS (Output_def);
  53 IMPLEMENT_DEFAULT_EQUAL_P (Output_def);
  54
  55 SCM
  56 Output_def::mark_smob (SCM m)
  57 {
  58   Output_def *mo = (Output_def*) SCM_CELL_WORD_1 (m);
  59
  60   /* FIXME: why is this necessary?
  61      all paper_ should be protected by themselves. */
  62   if (mo->parent_)
  63     scm_gc_mark (mo->parent_->self_scm ());
  64
  65   return mo->scope_;
  66 }
  67
  68 void
  69 assign_context_def (Output_def * m, SCM transdef)
  70 {
  71   Context_def *tp = unsmob_context_def (transdef);
  72   assert (tp);
  73
  74   if (tp)
  75     {
  76       SCM sym = tp->get_context_name ();
  77       m->set_variable (sym, transdef);
  78     }
  79 }
  80
  81 /* find the translator for NAME. NAME must be a symbol. */
  82 SCM
  83 find_context_def (Output_def const *m, SCM name)
  84 {
  85   Context_def *cd = unsmob_context_def (m->lookup_variable (name));
  86   return cd ? cd->self_scm () : SCM_EOL;
  87 }
  88
  89 int
  90 Output_def::print_smob (SCM s, SCM p, scm_print_state *)
  91 {
  92   Output_def * def = unsmob_output_def (s);
  93   scm_puts ("#< ", p);
  94   scm_puts (def->class_name (), p);
  95
  96   (void)def;
  97   scm_puts (">", p);
  98   return 1;
  99 }
 100
 101 Real
 102 Output_def::get_dimension (SCM s) const
 103 {
 104   SCM val = lookup_variable (s);
 105   return scm_to_double (val);
 106 }
 107
 108 SCM
 109 Output_def::lookup_variable (SCM sym) const
 110 {
 111   SCM var = ly_module_lookup (scope_, sym);
 112   if (SCM_VARIABLEP (var) && SCM_VARIABLE_REF (var) != SCM_UNDEFINED)
 113     return SCM_VARIABLE_REF (var);
 114
 115   if (parent_)
 116     return parent_->lookup_variable (sym);
 117
 118   return SCM_UNDEFINED;
 119 }
 120
 121 SCM
 122 Output_def::c_variable (string s) const
 123 {
 124   return lookup_variable (ly_symbol2scm (s.c_str ()));
 125 }
 126
 127 void
 128 Output_def::set_variable (SCM sym, SCM val)
 129 {
 130   scm_module_define (scope_, sym, val);
 131 }
 132
 133
 134 /* FIXME.  This is broken until we have a generic way of
 135    putting lists inside the \layout block.  */
 136 Interval
 137 line_dimensions_int (Output_def *def, int n)
 138 {
 139   Real lw = def->get_dimension (ly_symbol2scm ("line-width"));
 140   Real ind = n
 141     ? def->get_dimension (ly_symbol2scm ("short-indent"))
 142     : def->get_dimension (ly_symbol2scm ("indent"));
 143   return Interval (ind, lw);
 144 }
 145
 146