lily/script-interface.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1999--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 "script-interface.hh"
  21
  22 #include "directional-element-interface.hh"
  23 #include "item.hh"
  24 #include "warn.hh"
  25 #include "font-interface.hh"
  26 #include "side-position-interface.hh"
  27 #include "output-def.hh"
  28 #include "lookup.hh"
  29 #include "stem.hh"
  30 #include "note-column.hh"
  31
  32 Stencil
  33 Script_interface::get_stencil (Grob *me, Direction d)
  34 {
  35   SCM s = me->get_property ("script-stencil");
  36   assert (scm_is_pair (s));
  37
  38   SCM key = scm_car (s);
  39   if (key == ly_symbol2scm ("feta"))
  40     {
  41       SCM name_entry = scm_cdr (s);
  42       SCM str = ((scm_is_pair (name_entry)) ? index_get_cell (name_entry, d)
  43                  : name_entry);
  44       return Font_interface::get_default_font (me)
  45         ->find_by_name ("scripts." + ly_scm2string (str));
  46     }
  47   else
  48     assert (false);
  49
  50   return Stencil ();
  51 }
  52
  53 MAKE_SCHEME_CALLBACK (Script_interface, calc_positioning_done, 1);
  54 SCM
  55 Script_interface::calc_positioning_done (SCM smob)
  56 {
  57   Grob *me = unsmob_grob (smob);
  58   if (Grob *par = me->get_parent (X_AXIS))
  59     {
  60       Grob *stem = Note_column::get_stem (par);
  61       if (stem && Stem::first_head (stem))
  62         me->set_parent (Stem::first_head (stem), X_AXIS);
  63     }
  64   return SCM_BOOL_T;
  65 }
  66
  67 Direction
  68 Script_interface::get_direction (Grob *me)
  69 {
  70   Direction relative_dir = Direction (1);
  71   SCM reldir = me->get_property ("side-relative-direction");
  72   if (is_direction (reldir))
  73     relative_dir = to_dir (reldir);
  74
  75   SCM other_elt = me->get_object ("direction-source");
  76   Grob *e = unsmob_grob (other_elt);
  77   if (e)
  78     return (Direction) (relative_dir * get_grob_direction (e));
  79
  80   return CENTER;
  81 }
  82
  83 MAKE_SCHEME_CALLBACK (Script_interface, calc_direction, 1);
  84 SCM
  85 Script_interface::calc_direction (SCM smob)
  86 {
  87   Grob *me = unsmob_grob (smob);
  88   Direction d = Script_interface::get_direction (me);
  89
  90   if (!d)
  91     {
  92       me->programming_error ("script direction not yet known");
  93       d = DOWN;
  94     }
  95
  96   (void) me->get_property ("positioning-done");
  97   return scm_from_int (d);
  98 }
  99
 100 MAKE_SCHEME_CALLBACK (Script_interface, calc_cross_staff, 1);
 101 SCM
 102 Script_interface::calc_cross_staff (SCM smob)
 103 {
 104   Grob *me = unsmob_grob (smob);
 105   Grob *stem = Note_column::get_stem (me->get_parent (X_AXIS));
 106
 107   if (stem && to_boolean (stem->get_property ("cross-staff")))
 108     return SCM_BOOL_T;
 109
 110   Grob *slur = unsmob_grob (me->get_object ("slur"));
 111   SCM avoid_slur = me->get_property ("avoid-slur");
 112   if (slur && to_boolean (slur->get_property ("cross-staff"))
 113       && (avoid_slur == ly_symbol2scm ("outside")
 114           || avoid_slur == ly_symbol2scm ("around")))
 115     return SCM_BOOL_T;
 116
 117   return SCM_BOOL_F;
 118 }
 119
 120 MAKE_SCHEME_CALLBACK (Script_interface, print, 1);
 121
 122 SCM
 123 Script_interface::print (SCM smob)
 124 {
 125   Grob *me = unsmob_grob (smob);
 126
 127   Direction dir = get_grob_direction (me);
 128
 129   return get_stencil (me, dir).smobbed_copy ();
 130 }
 131
 132 struct Text_script
 133 {
 134   DECLARE_GROB_INTERFACE ();
 135 };
 136
 137 ADD_INTERFACE (Text_script,
 138                "An object that is put above or below a note.",
 139
 140                /* properties */
 141                "add-stem-support "
 142                "avoid-slur "
 143                "script-priority "
 144                "slur "
 145                );
 146
 147 /*
 148   Hmm. Where should we put add-stem-support ?
 149 */
 150 ADD_INTERFACE (Script_interface,
 151                "An object that is put above or below a note.",
 152
 153                /* properties */
 154                "add-stem-support "
 155                "avoid-slur "
 156                "direction-source "
 157                "positioning-done "
 158                "script-priority "
 159                "script-stencil "
 160                "side-relative-direction "
 161                "slur "
 162                "slur-padding "
 163                "toward-stem-shift "
 164                );
 165