lily/breathing-sign-engraver.cc

   1 /*
   2   breathing_sign-engraver.cc -- implement Breathing_sign_engraver
   3
   4   (c) 1999--2009 Michael Krause
   5
   6   written for the GNU LilyPond music typesetter
   7
   8   TODO:
   9
  10   . Cancel any beams running through the breathing sign
  11   ([e8 \breathe f e f] should become [e8] \breathe [f e f])
  12   . Spacing is not yet completely pretty
  13 */
  14
  15 #include "breathing-sign.hh"
  16 #include "engraver.hh"
  17 #include "item.hh"
  18 #include "stream-event.hh"
  19
  20 #include "translator.icc"
  21
  22 class Breathing_sign_engraver : public Engraver
  23 {
  24 public:
  25   TRANSLATOR_DECLARATIONS (Breathing_sign_engraver);
  26
  27 protected:
  28   void process_music ();
  29   void stop_translation_timestep ();
  30
  31   DECLARE_TRANSLATOR_LISTENER (breathing);
  32 private:
  33   Stream_event *breathing_sign_event_;
  34   Grob *breathing_sign_;
  35 };
  36
  37 Breathing_sign_engraver::Breathing_sign_engraver ()
  38 {
  39   breathing_sign_ = 0;
  40   breathing_sign_event_ = 0;
  41 }
  42
  43 IMPLEMENT_TRANSLATOR_LISTENER (Breathing_sign_engraver, breathing);
  44 void
  45 Breathing_sign_engraver::listen_breathing (Stream_event *ev)
  46 {
  47   ASSIGN_EVENT_ONCE (breathing_sign_event_, ev);
  48 }
  49
  50 void
  51 Breathing_sign_engraver::process_music ()
  52 {
  53   if (breathing_sign_event_)
  54     {
  55       breathing_sign_ = make_item ("BreathingSign", breathing_sign_event_->self_scm ());
  56     }
  57 }
  58
  59 void
  60 Breathing_sign_engraver::stop_translation_timestep ()
  61 {
  62   breathing_sign_ = 0;
  63   breathing_sign_event_ = 0;
  64 }
  65
  66 ADD_TRANSLATOR (Breathing_sign_engraver,
  67                 /* doc */
  68                 "Create a breathing sign.",
  69
  70                 /* create */
  71                 "BreathingSign ",
  72
  73                 /* read */
  74                 "",
  75
  76                 /* write */
  77                 ""
  78                 );