lily/breathing-sign.cc

   1 /*
   2   breathing_sign.cc -- implement Breathing_sign
   3
   4   (c)  1999--2003 Michael Krause
   5
   6   written for the GNU LilyPond music typesetter
   7
   8   TODO: --> see breathing-sign-engraver.cc
   9
  10   Extensions for ancient notation (c)  2003 by Juergen Reuter
  11 */
  12
  13 #include "staff-symbol-referencer.hh"
  14 #include "directional-element-interface.hh"
  15 #include "breathing-sign.hh"
  16 #include "string.hh"
  17 #include "molecule.hh"
  18 #include "paper-def.hh"
  19 #include "lookup.hh"
  20
  21 #include "dimensions.hh"
  22 #include "direction.hh"
  23 #include "text-item.hh"
  24 #include "font-interface.hh"
  25
  26 /*
  27   TODO: thickness should be a grob property (unit: stafflinethickness)
  28  rather than hardwired to (staff_space / 6).
  29  */
  30
  31
  32
  33 /*
  34   Gregorian chant divisio minima.  (Actually, this was the original
  35   breathing sign by Michael. -- jr)
  36  */
  37 MAKE_SCHEME_CALLBACK (Breathing_sign,divisio_minima,1);
  38 SCM
  39 Breathing_sign::divisio_minima (SCM smob)
  40 {
  41   Grob *me = unsmob_grob (smob);
  42   Real staff_space = Staff_symbol_referencer::staff_space (me);
  43   Real staff_size;
  44   Real thickness = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
  45   SCM lt =  me->get_grob_property ("thickness");
  46   if (gh_number_p (lt))
  47     thickness *= gh_scm2double (lt);
  48   if (Staff_symbol_referencer::get_staff_symbol (me))
  49     {
  50       staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
  51     }
  52   else
  53     staff_size = 0.0;
  54
  55   Real blotdiameter = me->get_paper ()->get_realvar (ly_symbol2scm ("blotdiameter"));
  56
  57   /*
  58    * Draw a small vertical line through the uppermost (or, depending
  59    * on direction, lowermost) staff line.
  60    */
  61   Interval xdim (0, thickness);
  62   Interval ydim (-0.5 * staff_space, +0.5 * staff_space);
  63   Box b (xdim, ydim);
  64   Molecule out = Lookup::round_filled_box (b, blotdiameter);
  65   return out.smobbed_copy ();
  66 }
  67
  68 /*
  69   Gregorian chant divisio maior.
  70  */
  71 MAKE_SCHEME_CALLBACK (Breathing_sign,divisio_maior,1);
  72 SCM
  73 Breathing_sign::divisio_maior (SCM smob)
  74 {
  75   Grob *me = unsmob_grob (smob);
  76   Real staff_space = Staff_symbol_referencer::staff_space (me);
  77   Real staff_size;
  78   Real thickness = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
  79   SCM lt =  me->get_grob_property ("thickness");
  80   if (gh_number_p (lt))
  81     thickness *= gh_scm2double (lt);
  82   if (Staff_symbol_referencer::get_staff_symbol (me))
  83     {
  84       staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
  85     }
  86   else
  87     staff_size = 0.0;
  88
  89   Real blotdiameter = me->get_paper ()->get_realvar (ly_symbol2scm ("blotdiameter"));
  90
  91   /*
  92    * Draw a vertical line that is vertically centered in the staff
  93    * (just like a bar).  The height of this line should be a little
  94    * more than half the size of the staff, such that the endings of
  95    * the line are in the middle of a staff space.
  96    */
  97   int lines = Staff_symbol_referencer::line_count (me);
  98   int height = lines / 2; // little more than half of staff size
  99   if ((lines & 1) != (height & 1))
 100     height++; // ensure endings are centered in staff space
 101
 102   Interval xdim (0, thickness);
 103   Interval ydim (-0.5 * height, +0.5 * height);
 104   Box b (xdim, ydim);
 105   Molecule out = Lookup::round_filled_box (b, blotdiameter);
 106   return out.smobbed_copy ();
 107 }
 108
 109 /*
 110   Gregorian chant divisio maxima.
 111  */
 112 MAKE_SCHEME_CALLBACK (Breathing_sign,divisio_maxima,1);
 113 SCM
 114 Breathing_sign::divisio_maxima (SCM smob)
 115 {
 116   Grob *me = unsmob_grob (smob);
 117   Real staff_space = Staff_symbol_referencer::staff_space (me);
 118   Real staff_size;
 119   Real thickness = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
 120   SCM lt =  me->get_grob_property ("thickness");
 121   if (gh_number_p (lt))
 122     thickness *= gh_scm2double (lt);
 123   if (Staff_symbol_referencer::get_staff_symbol (me))
 124     {
 125       staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
 126     }
 127   else
 128     staff_size = 0.0;
 129
 130   Real blotdiameter = me->get_paper ()->get_realvar (ly_symbol2scm ("blotdiameter"));
 131
 132   // like a "|" type bar
 133   Interval xdim (0, thickness);
 134   Interval ydim (-0.5 * staff_size, +0.5 * staff_size);
 135   Box b (xdim, ydim);
 136   Molecule out = Lookup::round_filled_box (b, blotdiameter);
 137   return out.smobbed_copy ();
 138 }
 139
 140 /*
 141   Gregorian chant finalis.
 142  */
 143 MAKE_SCHEME_CALLBACK (Breathing_sign,finalis,1);
 144 SCM
 145 Breathing_sign::finalis (SCM smob)
 146 {
 147   Grob *me = unsmob_grob (smob);
 148   Real staff_space = Staff_symbol_referencer::staff_space (me);
 149   Real staff_size;
 150   Real thickness = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
 151   SCM lt =  me->get_grob_property ("thickness");
 152   if (gh_number_p (lt))
 153     thickness *= gh_scm2double (lt);
 154   if (Staff_symbol_referencer::get_staff_symbol (me))
 155     {
 156       staff_size = (Staff_symbol_referencer::line_count (me) - 1) * staff_space;
 157     }
 158   else
 159     staff_size = 0.0;
 160
 161   Real blotdiameter = me->get_paper ()->get_realvar (ly_symbol2scm ("blotdiameter"));
 162
 163   // like a "||" type bar
 164   Interval xdim (0, thickness);
 165   Interval ydim (-0.5 * staff_size, +0.5 * staff_size);
 166   Box b (xdim, ydim);
 167   Molecule line1 = Lookup::round_filled_box (b, blotdiameter);
 168   Molecule line2 (line1);
 169   line2.translate_axis (0.5 * staff_space, X_AXIS);
 170   line1.add_molecule (line2);
 171
 172   return line1.smobbed_copy ();
 173 }
 174
 175 MAKE_SCHEME_CALLBACK (Breathing_sign,offset_callback,2);
 176 SCM
 177 Breathing_sign::offset_callback (SCM element_smob, SCM)
 178 {
 179   Grob *me = unsmob_grob (element_smob);
 180
 181   Direction d = Directional_element_interface::get (me);
 182   if (!d)
 183     {
 184       d = UP;
 185       Directional_element_interface::set (me, d);
 186     }
 187
 188   Real inter_f = Staff_symbol_referencer::staff_space (me)/2;
 189   int sz = Staff_symbol_referencer::line_count (me)-1;
 190   return gh_double2scm (inter_f * sz * d);
 191 }
 192
 193 ADD_INTERFACE(Breathing_sign, "breathing-sign-interface",
 194               "A breathing sign.",
 195               "direction");