lily/script-interface.cc

   1 /*
   2   script-interface.cc -- implement Script_interface
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "script-interface.hh"
  10
  11 #include "directional-element-interface.hh"
  12 #include "item.hh"
  13 #include "warn.hh"
  14 #include "font-interface.hh"
  15 #include "side-position-interface.hh"
  16 #include "output-def.hh"
  17 #include "lookup.hh"
  18 #include "stem.hh"
  19 #include "note-column.hh"
  20
  21 Stencil
  22 Script_interface::get_stencil (Grob *me, Direction d)
  23 {
  24   SCM s = me->get_property ("script-stencil");
  25   assert (scm_is_pair (s));
  26
  27   SCM key = scm_car (s);
  28   if (key == ly_symbol2scm ("feta"))
  29     {
  30       SCM name_entry = scm_cdr (s);
  31       SCM str = ((scm_is_pair (name_entry)) ? index_get_cell (name_entry, d)
  32                  : name_entry);
  33       return Font_interface::get_default_font (me)
  34         ->find_by_name ("scripts." + ly_scm2string (str));
  35     }
  36   else
  37     assert (false);
  38
  39   return Stencil ();
  40 }
  41
  42 MAKE_SCHEME_CALLBACK (Script_interface, calc_positioning_done, 1);
  43 SCM
  44 Script_interface::calc_positioning_done (SCM smob)
  45 {
  46   Grob *me = unsmob_grob (smob);
  47   if (Grob *par = me->get_parent (X_AXIS))
  48     {
  49       Grob *stem = Note_column::get_stem (par);
  50       if (stem && Stem::first_head (stem))
  51         me->set_parent (Stem::first_head (stem), X_AXIS);
  52     }
  53   return SCM_BOOL_T;
  54 }
  55
  56 Direction
  57 Script_interface::get_direction (Grob *me)
  58 {
  59   Direction relative_dir = Direction (1);
  60   SCM reldir = me->get_property ("side-relative-direction");
  61   if (is_direction (reldir))
  62     relative_dir = to_dir (reldir);
  63
  64   SCM other_elt = me->get_object ("direction-source");
  65   Grob *e = unsmob_grob (other_elt);
  66   if (e)
  67     return (Direction) (relative_dir * get_grob_direction (e));
  68
  69   return CENTER;
  70 }
  71
  72 MAKE_SCHEME_CALLBACK (Script_interface, calc_direction, 1);
  73 SCM
  74 Script_interface::calc_direction (SCM smob)
  75 {
  76   Grob *me = unsmob_grob (smob);
  77   Direction d = Script_interface::get_direction (me);
  78
  79   if (!d)
  80     {
  81       me->programming_error ("script direction not yet known");
  82       d = DOWN;
  83     }
  84
  85   (void) me->get_property ("positioning-done");
  86   return scm_from_int (d);
  87 }
  88
  89 MAKE_SCHEME_CALLBACK (Script_interface, calc_cross_staff, 1);
  90 SCM
  91 Script_interface::calc_cross_staff (SCM smob)
  92 {
  93   Grob *me = unsmob_grob (smob);
  94   Grob *stem = Note_column::get_stem (me->get_parent (X_AXIS));
  95
  96   if (stem && to_boolean (stem->get_property ("cross-staff")))
  97     return SCM_BOOL_T;
  98
  99   Grob *slur = unsmob_grob (me->get_object ("slur"));
 100   SCM avoid_slur = me->get_property ("avoid-slur");
 101   if (slur && to_boolean (slur->get_property ("cross-staff"))
 102       && (avoid_slur == ly_symbol2scm ("outside")
 103           || avoid_slur == ly_symbol2scm ("around")))
 104     return SCM_BOOL_T;
 105
 106   return SCM_BOOL_F;
 107 }
 108
 109 MAKE_SCHEME_CALLBACK (Script_interface, print, 1);
 110
 111 SCM
 112 Script_interface::print (SCM smob)
 113 {
 114   Grob *me = unsmob_grob (smob);
 115
 116   Direction dir = get_grob_direction (me);
 117
 118   return get_stencil (me, dir).smobbed_copy ();
 119 }
 120
 121 struct Text_script
 122 {
 123   DECLARE_GROB_INTERFACE ();
 124 };
 125
 126 ADD_INTERFACE (Text_script,
 127                "An object that is put above or below a note.",
 128
 129                /* properties */
 130                "add-stem-support "
 131                "avoid-slur "
 132                "script-priority "
 133                "slur "
 134                );
 135
 136 /*
 137   Hmm. Where should we put add-stem-support ?
 138 */
 139 ADD_INTERFACE (Script_interface,
 140                "An object that is put above or below a note.",
 141
 142                /* properties */
 143                "add-stem-support "
 144                "avoid-slur "
 145                "direction-source "
 146                "positioning-done "
 147                "script-priority "
 148                "script-stencil "
 149                "side-relative-direction "
 150                "slur "
 151                "slur-padding "
 152                "toward-stem-shift "
 153                );
 154