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--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9
  10 #include <math.h>
  11
  12 #include "virtual-font-metric.hh"
  13 #include "all-font-metrics.hh"
  14 #include "string.hh"
  15 #include "misc.hh"
  16 #include "paper-def.hh"
  17 #include "warn.hh"
  18 #include "scaled-font-metric.hh"
  19 #include "main.hh"
  20 #include "scm-hash.hh"
  21 #include "input-file-results.hh" // urg? header_global
  22 #include "paper-outputter.hh"
  23 #include "ly-modules.hh"
  24
  25
  26 /*
  27   This is an almost empty thing. The only substantial thing this class
  28   handles, is scaling up and down to real-world dimensions (internally
  29   dimensions are against global staff-space.)
  30
  31  */
  32 Paper_def::Paper_def ()
  33 {
  34 }
  35
  36 Paper_def::~Paper_def ()
  37 {
  38 }
  39
  40 Paper_def::Paper_def (Paper_def const&src)
  41   : Music_output_def (src)
  42 {
  43 }
  44
  45
  46 Real
  47 Paper_def::get_var (String s) const
  48 {
  49   return get_realvar (ly_symbol2scm (s.to_str0 ()));
  50 }
  51
  52 Real
  53 Paper_def::get_realvar (SCM s) const
  54 {
  55   SCM val = lookup_variable (s);
  56   SCM scale = lookup_variable (ly_symbol2scm ("outputscale"));
  57
  58   Real sc = gh_scm2double (scale);
  59   return gh_scm2double (val) / sc;
  60 }
  61
  62 /*
  63   FIXME. This is broken until we have a generic way of
  64   putting lists inside the \paper block.
  65  */
  66 Interval
  67 Paper_def::line_dimensions_int (int n) const
  68 {
  69   Real lw =  get_var ("linewidth");
  70   Real ind = n? 0.0:get_var ("indent");
  71
  72   return Interval (ind, lw);
  73 }
  74
  75
  76
  77 int Paper_def::score_count_ = 0;
  78
  79 int
  80 Paper_def::get_next_score_count () const
  81 {
  82   return score_count_ ++;
  83 }
  84
  85 void
  86 Paper_def::reset_score_count ()
  87 {
  88   score_count_ = 0;
  89 }
  90
  91
  92 Paper_outputter*
  93 Paper_def::get_paper_outputter ()
  94 {
  95   String outname = outname_string ();
  96   progress_indication (_f ("paper output to `%s'...",
  97                            outname == "-" ? String ("<stdout>") : outname));
  98
  99   global_input_file->target_strings_.push (outname);
 100   Paper_outputter * po = new Paper_outputter (outname);
 101   Path p = split_path (outname);
 102   p.ext = "";
 103   po->basename_ = p.to_string ();
 104   return po;
 105 }
 106
 107
 108 /*
 109   todo: use symbols and hashtable idx?
 110
 111
 112 */
 113 Font_metric *
 114 Paper_def::find_font (SCM fn, Real m)
 115 {
 116   SCM key = gh_cons (fn, gh_double2scm (m));
 117   SCM met = scm_assoc (key, scaled_fonts_);
 118
 119   if (gh_pair_p (met))
 120     return unsmob_metrics (ly_cdr (met));
 121
 122   /*
 123     Hmm. We're chaining font - metrics. Should consider wether to merge
 124     virtual-font and scaled_font.
 125    */
 126   Font_metric*  f=0;
 127   if (gh_list_p (fn))
 128     {
 129       f = new Virtual_font_metric (fn, m, this);
 130     }
 131   else
 132     {
 133       SCM var =   ly_module_lookup (scope_, ly_symbol2scm ("outputscale"));
 134       m /= gh_scm2double (scm_variable_ref (var));
 135
 136       f = all_fonts_global->find_font (ly_scm2string (fn));
 137       SCM val = Scaled_font_metric::make_scaled_font_metric (f, m);
 138       scaled_fonts_ = scm_acons (key, val, scaled_fonts_);
 139       f = unsmob_metrics (val);
 140       scm_gc_unprotect_object (val);
 141     }
 142
 143   return f;
 144 }
 145
 146
 147 /*
 148   Return alist to translate internally used fonts back to real-world
 149   coordinates.  */
 150 SCM
 151 Paper_def::font_descriptions ()const
 152 {
 153   SCM l = SCM_EOL;
 154   for (SCM s = scaled_fonts_; gh_pair_p (s); s = ly_cdr (s))
 155     {
 156       SCM desc = ly_caar (s);
 157       SCM mdesc = unsmob_metrics (ly_cdar (s))->description_;
 158
 159       l = gh_cons (gh_cons (mdesc, desc), l);
 160     }
 161   return l;
 162 }