lily/font-metric.cc

   1 /*
   2   font-metric.cc -- implement Font_metric
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7
   8   Mats Bengtsson <matsb@s3.kth.se> (the ugly TeX parsing in text_dimension)
   9 */
  10
  11 #include "font-metric.hh"
  12
  13 #include <cmath>
  14 #include <cctype>
  15 using namespace std;
  16
  17 #include "dimensions.hh"
  18 #include "modified-font-metric.hh"
  19 #include "open-type-font.hh"
  20 #include "stencil.hh"
  21 #include "warn.hh"
  22
  23 #include "ly-smobs.icc"
  24
  25 Real
  26 Font_metric::design_size () const
  27 {
  28   return 1.0 * point_constant;
  29 }
  30
  31 Stencil
  32 Font_metric::find_by_name (string s) const
  33 {
  34   replace_all (&s, '-', 'M');
  35   int idx = name_to_index (s);
  36   Box b;
  37
  38   SCM expr = SCM_EOL;
  39   if (idx >= 0)
  40     {
  41       expr = scm_list_3 (ly_symbol2scm ("named-glyph"),
  42                          self_scm (),
  43                          ly_string2scm (s));
  44       b = get_indexed_char (idx);
  45     }
  46
  47   Stencil q (b, expr);
  48   return q;
  49 }
  50
  51 Font_metric::Font_metric ()
  52 {
  53   description_ = SCM_EOL;
  54   self_scm_ = SCM_EOL;
  55   smobify_self ();
  56 }
  57
  58 Font_metric::Font_metric (Font_metric const &)
  59 {
  60 }
  61
  62 Font_metric::~Font_metric ()
  63 {
  64 }
  65
  66 size_t
  67 Font_metric::count () const
  68 {
  69   return 0;
  70 }
  71
  72 Box
  73 Font_metric::get_ascii_char (size_t) const
  74 {
  75   return Box (Interval (0, 0), Interval (0, 0));
  76 }
  77
  78 Box
  79 Font_metric::get_indexed_char (size_t k) const
  80 {
  81   return get_ascii_char (k);
  82 }
  83
  84 size_t
  85 Font_metric::name_to_index (string) const
  86 {
  87   return (size_t)-1;
  88 }
  89
  90 Offset
  91 Font_metric::get_indexed_wxwy (size_t) const
  92 {
  93   return Offset (0, 0);
  94 }
  95
  96 void
  97 Font_metric::derived_mark () const
  98 {
  99 }
 100
 101 SCM
 102 Font_metric::mark_smob (SCM s)
 103 {
 104   Font_metric *m = (Font_metric *) SCM_CELL_WORD_1 (s);
 105   m->derived_mark ();
 106   return m->description_;
 107 }
 108
 109 int
 110 Font_metric::print_smob (SCM s, SCM port, scm_print_state *)
 111 {
 112   Font_metric *m = unsmob_metrics (s);
 113   scm_puts ("#<", port);
 114   scm_puts (m->class_name (), port);
 115   scm_puts (" ", port);
 116   scm_write (m->description_, port);
 117   scm_puts (">", port);
 118   return 1;
 119 }
 120
 121 IMPLEMENT_SMOBS (Font_metric);
 122 IMPLEMENT_DEFAULT_EQUAL_P (Font_metric);
 123 IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?");
 124
 125 SCM
 126 Font_metric::font_file_name () const
 127 {
 128   return scm_car (description_);
 129 }
 130
 131 string
 132 Font_metric::font_name () const
 133 {
 134   string s ("unknown");
 135   return s;
 136 }
 137
 138 size_t
 139 Font_metric::index_to_ascii (size_t i) const
 140 {
 141   return i;
 142 }
 143
 144 size_t
 145 Font_metric::index_to_charcode (size_t i) const
 146 {
 147   return index_to_ascii (i);
 148 }
 149
 150 Stencil
 151 Font_metric::get_ascii_char_stencil (size_t code) const
 152 {
 153   SCM at = scm_list_3 (ly_symbol2scm ("char"), self_scm (),
 154                        scm_from_unsigned (code));
 155   Box b = get_ascii_char (code);
 156   return Stencil (b, at);
 157 }
 158
 159 Stencil
 160 Font_metric::get_indexed_char_stencil (size_t code) const
 161 {
 162   size_t idx = index_to_ascii (code);
 163   SCM at = scm_list_3 (ly_symbol2scm ("char"), self_scm (),
 164                        scm_from_unsigned (idx));
 165   Box b = get_indexed_char (code);
 166   return Stencil (b, at);
 167 }
 168
 169 Offset
 170 Font_metric::attachment_point (string) const
 171 {
 172   return Offset (0, 0);
 173 }
 174
 175 SCM
 176 Font_metric::sub_fonts () const
 177 {
 178   return SCM_EOL;
 179 }
 180
 181 Stencil
 182 Font_metric::word_stencil (string str) const
 183 {
 184   return text_stencil (str);
 185 }
 186
 187 Stencil
 188 Font_metric::text_stencil (string /* str */) const
 189 {
 190   programming_error("Cannot get a text stencil from this font");
 191   return Stencil (Box (), SCM_EOL);
 192 }
 193
 194 Box
 195 Font_metric::text_dimension (string) const
 196 {
 197   return Box (Interval (0, 0), Interval (0, 0));
 198 }
 199