lily/breathing-sign-engraver.cc

   1 /*
   2   breathing_sign-engraver.cc -- implement Breathing_sign_engraver
   3
   4   (c) 1999--2006 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
  19 class Breathing_sign_engraver : public Engraver
  20 {
  21 public:
  22   TRANSLATOR_DECLARATIONS (Breathing_sign_engraver);
  23
  24 protected:
  25   virtual bool try_music (Music *event);
  26   void process_music ();
  27   void stop_translation_timestep ();
  28
  29 private:
  30   Music *breathing_sign_event_;
  31   Grob *breathing_sign_;
  32 };
  33
  34 Breathing_sign_engraver::Breathing_sign_engraver ()
  35 {
  36   breathing_sign_ = 0;
  37   breathing_sign_event_ = 0;
  38 }
  39
  40 bool
  41 Breathing_sign_engraver::try_music (Music *r)
  42 {
  43   breathing_sign_event_ = r;
  44   return true;
  45 }
  46
  47 void
  48 Breathing_sign_engraver::process_music ()
  49 {
  50   if (breathing_sign_event_)
  51     {
  52       breathing_sign_ = make_item ("BreathingSign", breathing_sign_event_->self_scm ());
  53     }
  54 }
  55
  56 void
  57 Breathing_sign_engraver::stop_translation_timestep ()
  58 {
  59   breathing_sign_ = 0;
  60   breathing_sign_event_ = 0;
  61 }
  62
  63 #include "translator.icc"
  64
  65 ADD_TRANSLATOR (Breathing_sign_engraver,
  66                 /* doc */ "",
  67                 /* create */ "BreathingSign",
  68                 /* accept */ "breathing-event",
  69                 /* read */ "",
  70                 /* write */ "");