lily/pitched-trill-engraver.cc

   1 /*
   2   pitched-trill-engraver.cc -- implement Pitched_trill_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "engraver.hh"
  10
  11 #include "dots.hh"
  12 #include "pointer-group-interface.hh"
  13 #include "axis-group-interface.hh"
  14 #include "context.hh"
  15 #include "note-head.hh"
  16 #include "item.hh"
  17 #include "side-position-interface.hh"
  18 #include "pitch.hh"
  19 #include "warn.hh"
  20
  21 class Pitched_trill_engraver : public Engraver
  22 {
  23 public:
  24   TRANSLATOR_DECLARATIONS (Pitched_trill_engraver);
  25
  26 protected:
  27   DECLARE_ACKNOWLEDGER (note_head);
  28   DECLARE_ACKNOWLEDGER (dots);
  29   DECLARE_ACKNOWLEDGER (text_spanner);
  30   void process_music ();
  31   void stop_translation_timestep ();
  32
  33 private:
  34   Item *trill_head_;
  35   Item *trill_group_;
  36   Item *trill_accidental_;
  37
  38   Link_array<Grob> heads_;
  39
  40   void make_trill (Music *);
  41 };
  42
  43 Pitched_trill_engraver::Pitched_trill_engraver ()
  44 {
  45   trill_head_ = 0;
  46   trill_group_ = 0;
  47   trill_accidental_ = 0;
  48 }
  49
  50 void
  51 Pitched_trill_engraver::acknowledge_dots (Grob_info info)
  52 {
  53   heads_.push (info.grob ());
  54 }
  55 void
  56 Pitched_trill_engraver::acknowledge_note_head (Grob_info info)
  57 {
  58   heads_.push (info.grob ());
  59 }
  60
  61 void
  62 Pitched_trill_engraver::acknowledge_text_spanner (Grob_info info)
  63 {
  64   Music *mus = info.music_cause ();
  65   if (mus
  66       && mus->is_mus_type ("trill-span-event")
  67       && to_dir (mus->get_property ("span-direction")) == START
  68       && unsmob_pitch (mus->get_property ("pitch")))
  69     make_trill (mus);
  70 }
  71
  72 void
  73 Pitched_trill_engraver::make_trill (Music *mus)
  74 {
  75   SCM scm_pitch = mus->get_property ("pitch");
  76   Pitch *p = unsmob_pitch (scm_pitch);
  77
  78   SCM keysig = get_property ("localKeySignature");
  79
  80   SCM key = scm_cons (scm_from_int (p->get_octave ()),
  81                       scm_from_int (p->get_notename ()));
  82
  83   SCM handle = scm_assoc (key, keysig);
  84   bool print_acc
  85     = (handle == SCM_BOOL_F)
  86     || p->get_alteration () == 0;
  87
  88   if (trill_head_)
  89     {
  90       programming_error ("already have a trill head.");
  91       trill_head_ = 0;
  92     }
  93
  94   trill_head_ = make_item ("TrillPitchHead", mus->self_scm ());
  95   SCM c0scm = get_property ("middleCPosition");
  96
  97   int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
  98
  99   trill_head_->set_property ("staff-position",
 100                              scm_from_int (unsmob_pitch (scm_pitch)->steps ()
 101                                            + c0));
 102
 103   trill_group_ = make_item ("TrillPitchGroup", mus->self_scm ());
 104
 105   Axis_group_interface::add_element (trill_group_, trill_head_);
 106
 107   if (print_acc)
 108     {
 109       trill_accidental_ = make_item ("TrillPitchAccidental", mus->self_scm ());
 110
 111       // fixme: naming -> alterations
 112       trill_accidental_->set_property ("accidentals", scm_list_1 (scm_from_int (p->get_alteration ())));
 113       Side_position_interface::add_support (trill_accidental_, trill_head_);
 114       trill_head_->set_object ("accidental-grob", trill_accidental_->self_scm ());
 115       trill_group_->set_parent (trill_head_, Y_AXIS);
 116       Axis_group_interface::add_element (trill_group_, trill_accidental_);
 117       trill_accidental_->set_parent (trill_head_, Y_AXIS);
 118     }
 119 }
 120
 121 void
 122 Pitched_trill_engraver::stop_translation_timestep ()
 123 {
 124   if (trill_group_)
 125     for (int i = 0; i < heads_.size (); i++)
 126       Side_position_interface::add_support (trill_group_, heads_[i]);
 127
 128   heads_.clear ();
 129   trill_head_ = 0;
 130   trill_group_ = 0;
 131   trill_accidental_ = 0;
 132 }
 133
 134 void
 135 Pitched_trill_engraver::process_music ()
 136 {
 137 }
 138
 139
 140 #include "translator.icc"
 141
 142 ADD_ACKNOWLEDGER (Pitched_trill_engraver, note_head);
 143 ADD_ACKNOWLEDGER (Pitched_trill_engraver, dots);
 144 ADD_ACKNOWLEDGER (Pitched_trill_engraver, text_spanner);
 145
 146 ADD_TRANSLATOR (Pitched_trill_engraver,
 147                 /* doc */ "Print the bracketed notehead after a notehead with trill.",
 148                 /* create */
 149                 "TrillPitchHead "
 150                 "TrillPitchAccidental "
 151                 "TrillPitchGroup",
 152                 /* accept */ "",
 153                 /* read */ "",
 154                 /* write */ "");