lily/balloon-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2006--2010 Han-Wen Nienhuys <hanwen@lilypond.org>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "engraver.hh"
  21
  22 #include "stream-event.hh"
  23 #include "item.hh"
  24
  25 #include "translator.icc"
  26
  27 class Balloon_engraver : public Engraver
  28 {
  29   TRANSLATOR_DECLARATIONS (Balloon_engraver);
  30
  31   DECLARE_TRANSLATOR_LISTENER (annotate_output);
  32   DECLARE_ACKNOWLEDGER (grob);
  33   vector<Stream_event *> events_;
  34
  35   void stop_translation_timestep ();
  36
  37   void balloonify (Grob *, Stream_event *);
  38 };
  39
  40 IMPLEMENT_TRANSLATOR_LISTENER (Balloon_engraver, annotate_output);
  41 void
  42 Balloon_engraver::listen_annotate_output (Stream_event *ev)
  43 {
  44   events_.push_back (ev);
  45 }
  46
  47 void
  48 Balloon_engraver::stop_translation_timestep ()
  49 {
  50   events_.clear ();
  51 }
  52
  53 Balloon_engraver::Balloon_engraver ()
  54 {
  55 }
  56
  57 void
  58 Balloon_engraver::balloonify (Grob *g, Stream_event *event)
  59 {
  60   Grob * b = make_item ("BalloonTextItem", event->self_scm ());
  61   b->set_property ("text", event->get_property ("text"));
  62   b->set_parent (g, Y_AXIS);
  63   b->set_parent (g, X_AXIS);
  64 }
  65
  66 void
  67 Balloon_engraver::acknowledge_grob (Grob_info info)
  68 {
  69   Stream_event *cause = info.event_cause ();
  70
  71   SCM arts = cause ? cause->get_property ("articulations") : SCM_EOL;
  72   for (SCM s = arts; scm_is_pair (s); s = scm_cdr (s))
  73     {
  74       Stream_event *e = unsmob_stream_event (scm_car (s));
  75       if (e->in_event_class ("annotate-output-event"))
  76         {
  77           balloonify (info.grob (), e);
  78         }
  79     }
  80
  81   for (vsize i = 0; i < events_.size (); i++)
  82     {
  83       if (info.grob ()->name () == ly_symbol2string (events_[i]->get_property ("symbol")))
  84         balloonify (info.grob (), events_[i]);
  85     }
  86 }
  87
  88
  89
  90 ADD_ACKNOWLEDGER (Balloon_engraver, grob);
  91
  92 ADD_TRANSLATOR (Balloon_engraver,
  93                /* doc */
  94                "Create balloon texts.",
  95
  96                /* create */
  97                "BalloonTextItem ",
  98
  99                /*read*/
 100                "",
 101
 102                /*write*/
 103                ""
 104                );