lily/paper-def.cc

   1 /*
   2   paper-def.cc -- implement Paper_def
   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 #include <math.h>
  10
  11 #include "all-font-metrics.hh"
  12 #include "string.hh"
  13 #include "misc.hh"
  14 #include "paper-def.hh"
  15 #include "debug.hh"
  16 #include "scaled-font-metric.hh"
  17 #include "main.hh"
  18 #include "scope.hh"
  19 #include "file-results.hh" // urg? header_global_p
  20 #include "paper-outputter.hh"
  21
  22 Paper_def::Paper_def ()
  23 {
  24 }
  25
  26 Paper_def::~Paper_def ()
  27 {
  28 }
  29
  30 Paper_def::Paper_def (Paper_def const&src)
  31   : Music_output_def (src)
  32 {
  33 }
  34
  35
  36 Real
  37 Paper_def::get_var (String s) const
  38 {
  39   return get_realvar (ly_symbol2scm (s.ch_C()));
  40 }
  41
  42 SCM
  43 Paper_def::get_scmvar (String s) const
  44 {
  45   return  scope_p_->scm_elem (ly_symbol2scm (s.ch_C()));
  46 }
  47
  48 Real
  49 Paper_def::get_realvar (SCM s) const
  50 {
  51   SCM val ;
  52   if (!scope_p_->try_retrieve (s, &val))
  53     {
  54       programming_error ("unknown paper variable: " +  ly_symbol2string (s));
  55       return 0.0;
  56     }
  57
  58   Real sc = 1.0;
  59   SCM ssc;
  60   if (scope_p_->try_retrieve (ly_symbol2scm ("outputscale"), &ssc))
  61     {
  62       sc = gh_scm2double (ssc);
  63     }
  64   if (gh_number_p (val))
  65     {
  66       return gh_scm2double (val) / sc;
  67     }
  68   else
  69     {
  70       programming_error ("not a real variable");
  71       return 0.0;
  72     }
  73 }
  74
  75 /*
  76   FIXME. This is broken until we have a generic way of
  77   putting lists inside the \paper block.
  78  */
  79 Interval
  80 Paper_def::line_dimensions_int (int n) const
  81 {
  82   Real lw =  get_var ("linewidth");
  83   Real ind = n? 0.0:get_var ("indent");
  84
  85   return Interval (ind, lw);
  86 }
  87
  88
  89
  90 int Paper_def::default_count_i_ = 0;
  91
  92 int
  93 Paper_def::get_next_default_count () const
  94 {
  95   return default_count_i_ ++;
  96 }
  97
  98 void
  99 Paper_def::reset_default_count()
 100 {
 101   default_count_i_ = 0;
 102 }
 103
 104
 105 Paper_outputter*
 106 Paper_def::paper_outputter_p ()
 107 {
 108   String basename = base_output_str ();
 109   String outname = basename;
 110   if (outname != "-")
 111     outname += String (".") + output_global_ch;
 112   progress_indication (_f ("paper output to %s...",
 113                            outname == "-" ? String ("<stdout>") : outname));
 114
 115   target_str_global_array.push (outname);
 116   Paper_outputter * po = new Paper_outputter (outname);
 117   po->basename_ = basename;
 118   return po;
 119 }
 120
 121
 122 /*
 123   todo: use symbols and hashtable idx?
 124 */
 125 Font_metric *
 126 Paper_def::find_font (SCM fn, Real m)
 127 {
 128   SCM key = gh_cons (fn, gh_double2scm (m));
 129   SCM met = scm_assoc (key, scaled_fonts_);
 130
 131   if (gh_pair_p (met))
 132     return unsmob_metrics (gh_cdr (met));
 133
 134   SCM ssc;
 135   if (scope_p_->try_retrieve (ly_symbol2scm ("outputscale"), &ssc))
 136     {
 137       m /= gh_scm2double (ssc);
 138     }
 139
 140   Font_metric*  f = all_fonts_global_p->find_font (ly_scm2string (fn));
 141   SCM val = Scaled_font_metric::make_scaled_font_metric (f, m);
 142   scaled_fonts_ = scm_acons (key, val, scaled_fonts_ );
 143
 144   scm_unprotect_object (val);
 145
 146   return dynamic_cast<Scaled_font_metric*> (unsmob_metrics (val));
 147 }
 148
 149
 150 /*
 151   Return alist to translate internally used fonts back to real-world
 152   coordinates.  */
 153 SCM
 154 Paper_def::font_descriptions ()const
 155 {
 156
 157
 158   SCM l = SCM_EOL;
 159   for (SCM s = scaled_fonts_; gh_pair_p (s); s = gh_cdr(s))
 160     {
 161       SCM desc = gh_caar (s);
 162       SCM mdesc = unsmob_metrics (gh_cdar (s))->description_;
 163
 164       l = gh_cons (gh_cons (mdesc, desc), l);
 165     }
 166   return l;
 167 }