lily/part-combine-engraver.cc

   1 /*
   2   part-combine-engraver.cc -- implement PC-engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>
   7
   8   Han-Wen Nienhuys <hanwen@xs4all.nl>
   9 */
  10
  11 #include "engraver.hh"
  12 #include "multi-measure-rest.hh"
  13 #include "note-head.hh"
  14 #include "side-position-interface.hh"
  15 #include "stem.hh"
  16 #include "stream-event.hh"
  17 #include "text-interface.hh"
  18 #include "item.hh"
  19
  20 #include "translator.icc"
  21
  22 class Part_combine_engraver : public Engraver
  23 {
  24   TRANSLATOR_DECLARATIONS (Part_combine_engraver);
  25
  26 protected:
  27   DECLARE_ACKNOWLEDGER (note_head);
  28   DECLARE_ACKNOWLEDGER (stem);
  29
  30   DECLARE_TRANSLATOR_LISTENER (part_combine);
  31   void process_music ();
  32   void stop_translation_timestep ();
  33 private:
  34   Item *text_;
  35   Stream_event *event_;
  36 };
  37
  38 IMPLEMENT_TRANSLATOR_LISTENER (Part_combine_engraver, part_combine);
  39 void
  40 Part_combine_engraver::listen_part_combine (Stream_event *ev)
  41 {
  42   ASSIGN_EVENT_ONCE (event_, ev);
  43 }
  44
  45 Part_combine_engraver::Part_combine_engraver ()
  46 {
  47   text_ = 0;
  48   event_ = 0;
  49 }
  50
  51 void
  52 Part_combine_engraver::process_music ()
  53 {
  54   if (event_
  55       && to_boolean (get_property ("printPartCombineTexts")))
  56     {
  57       SCM what = event_->get_property ("class");
  58       SCM text = SCM_EOL;
  59       if (what == ly_symbol2scm ("solo-one-event"))
  60         text = get_property ("soloText");
  61       else if (what == ly_symbol2scm ("solo-two-event"))
  62         text = get_property ("soloIIText");
  63       else if (what == ly_symbol2scm ("unisono-event"))
  64         text = get_property ("aDueText");
  65
  66       if (Text_interface::is_markup (text))
  67         {
  68           text_ = make_item ("CombineTextScript", event_->self_scm ());
  69           text_->set_property ("text", text);
  70         }
  71     }
  72 }
  73
  74 void
  75 Part_combine_engraver::acknowledge_note_head (Grob_info i)
  76 {
  77   if (text_)
  78     {
  79       Grob *t = text_;
  80       Side_position_interface::add_support (t, i.grob ());
  81       if (Side_position_interface::get_axis (t) == X_AXIS
  82           && !t->get_parent (Y_AXIS))
  83         t->set_parent (i.grob (), Y_AXIS);
  84     }
  85 }
  86
  87 void
  88 Part_combine_engraver::acknowledge_stem (Grob_info i)
  89 {
  90   if (text_)
  91     Side_position_interface::add_support (text_, i.grob ());
  92 }
  93
  94 void
  95 Part_combine_engraver::stop_translation_timestep ()
  96 {
  97   text_ = 0;
  98   event_ = 0;
  99 }
 100
 101 ADD_ACKNOWLEDGER (Part_combine_engraver, note_head);
 102 ADD_ACKNOWLEDGER (Part_combine_engraver, stem);
 103 ADD_TRANSLATOR (Part_combine_engraver,
 104                 /* doc */
 105                 "Part combine engraver for orchestral scores: Print markings"
 106                 " @q{a2}, @q{Solo}, @q{Solo II}, and @q{unisono}.",
 107
 108                 /* create */
 109                 "CombineTextScript ",
 110
 111                 /* read */
 112                 "printPartCombineTexts "
 113                 "soloText "
 114                 "soloIIText "
 115                 "aDueText ",
 116
 117                 /* write */
 118                 ""
 119                 );