lily/note-head.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "note-head.hh"
  21
  22 #include <cmath>
  23 #include <cctype>
  24 #include <algorithm>            //  min, max
  25
  26 using namespace std;
  27
  28 #include "directional-element-interface.hh"
  29 #include "font-interface.hh"
  30 #include "international.hh"
  31 #include "warn.hh"
  32 #include "grob.hh"
  33
  34 static Stencil
  35 internal_print (Grob *me, string *font_char)
  36 {
  37   SCM style = me->get_property ("style");
  38   if (!scm_is_symbol (style))
  39     style = ly_symbol2scm ("default");
  40
  41   string suffix = to_string (min (robust_scm2int (me->get_property ("duration-log"), 2), 2));
  42   if (style != ly_symbol2scm ("default"))
  43     {
  44       SCM gn = me->get_property ("glyph-name");
  45       if (scm_is_string (gn))
  46         suffix = ly_scm2string (gn);
  47     }
  48
  49   Font_metric *fm = Font_interface::get_default_font (me);
  50
  51   string idx_symmetric;
  52   string idx_directed;
  53   string idx_either;
  54   idx_symmetric = idx_either = "noteheads.s" + suffix;
  55   Stencil out = fm->find_by_name (idx_symmetric);
  56   if (out.is_empty ())
  57     {
  58       string prefix = "noteheads.";
  59
  60       Grob *stem = unsmob_grob (me->get_object ("stem"));
  61       Direction stem_dir = stem ? get_grob_direction (stem) : CENTER;
  62
  63       if (stem_dir == CENTER)
  64         programming_error ("must have stem dir for note head");
  65
  66       idx_directed = idx_either =
  67         prefix + ((stem_dir == UP) ? "u" : "d") + suffix;
  68       out = fm->find_by_name (idx_directed);
  69     }
  70
  71
  72   if (out.is_empty ())
  73     {
  74       me->warning (_f ("none of note heads `%s' or `%s' found",
  75                        idx_symmetric.c_str (), idx_directed.c_str ()));
  76       out = Stencil (Box (Interval (0, 0), Interval (0, 0)), SCM_EOL);
  77     }
  78   else
  79     *font_char = idx_either;
  80
  81   return out;
  82 }
  83
  84 /*
  85   TODO: make stem X-parent of notehead.
  86  */
  87 MAKE_SCHEME_CALLBACK (Note_head, stem_x_shift, 1);
  88 SCM
  89 Note_head::stem_x_shift (SCM smob)
  90 {
  91   Grob *me = unsmob_grob (smob);
  92   Grob *stem = unsmob_grob (me->get_object ("stem"));
  93   if (stem)
  94     (void) stem->get_property ("positioning-done");
  95
  96   return scm_from_int (0);
  97 }
  98
  99 MAKE_SCHEME_CALLBACK (Note_head, print, 1);
 100 SCM
 101 Note_head::print (SCM smob)
 102 {
 103   Grob *me = unsmob_grob (smob);
 104
 105   string idx;
 106   return internal_print (me, &idx).smobbed_copy ();
 107 }
 108
 109 Real
 110 Note_head::stem_attachment_coordinate (Grob *me, Axis a)
 111 {
 112   Offset off = robust_scm2offset (me->get_property ("stem-attachment"),
 113                                   Offset (0,0));
 114
 115   return off [a];
 116 }
 117
 118 Offset
 119 Note_head::get_stem_attachment (Font_metric *fm, string key)
 120 {
 121   Offset att;
 122
 123   int k = fm->name_to_index (key);
 124   if (k >= 0)
 125     {
 126       Box b = fm->get_indexed_char_dimensions (k);
 127       Offset wxwy = fm->attachment_point (key);
 128       for (int i = X_AXIS ; i < NO_AXES; i++)
 129         {
 130           Axis a = Axis (i);
 131
 132           Interval v = b[a];
 133           if (!v.is_empty ())
 134             {
 135               att[a] = (2 * (wxwy[a] - v.center ()) / v.length ());
 136             }
 137         }
 138     }
 139
 140   return att;
 141 }
 142
 143 MAKE_SCHEME_CALLBACK (Note_head, calc_stem_attachment, 1);
 144 SCM
 145 Note_head::calc_stem_attachment (SCM smob)
 146 {
 147   Grob *me  = unsmob_grob (smob);
 148   Font_metric *fm = Font_interface::get_default_font (me);
 149   string key;
 150   internal_print (me, &key);
 151
 152   return ly_offset2scm (get_stem_attachment (fm, key));
 153 }
 154
 155
 156 ADD_INTERFACE (Note_head,
 157                "A note head.  There are many possible values for"
 158                " @code{style}.  For a complete list, see"
 159                " @ruser{Note head styles}.",
 160
 161                /* properties */
 162                "note-names "
 163                "accidental-grob "
 164                "glyph-name "
 165                "stem-attachment "
 166                "style "
 167                );
 168