lily/text-engraver.cc

   1 /*
   2   text-engraver.cc -- implement Text_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "directional-element-interface.hh"
  10 #include "engraver.hh"
  11 #include "rhythmic-head.hh"
  12 #include "side-position-interface.hh"
  13 #include "stem.hh"
  14 #include "stream-event.hh"
  15 #include "text-interface.hh"
  16 #include "item.hh"
  17
  18 #include "translator.icc"
  19
  20 /**
  21    typeset directions that are  plain text.
  22 */
  23 class Text_engraver : public Engraver
  24 {
  25   vector<Stream_event *> evs_;
  26   vector<Grob*> texts_;
  27 public:
  28   TRANSLATOR_DECLARATIONS (Text_engraver);
  29 protected:
  30   void stop_translation_timestep ();
  31   void process_acknowledged ();
  32
  33   DECLARE_TRANSLATOR_LISTENER (text_script);
  34 };
  35
  36 IMPLEMENT_TRANSLATOR_LISTENER (Text_engraver, text_script);
  37 void
  38 Text_engraver::listen_text_script (Stream_event *ev)
  39 {
  40   evs_.push_back (ev);
  41 }
  42
  43 void
  44 Text_engraver::process_acknowledged ()
  45 {
  46   if (texts_.size ())
  47     return;
  48   for (vsize i = 0; i < evs_.size (); i++)
  49     {
  50       Stream_event *r = evs_[i];
  51
  52       // URG: Text vs TextScript
  53       Item *text = make_item ("TextScript", r->self_scm ());
  54
  55       int priority = robust_scm2int (text->get_property ("script-priority"),
  56                                      200);
  57
  58       /* see script-engraver.cc */
  59       priority += i;
  60
  61       text->set_property ("script-priority", scm_from_int (priority));
  62
  63       Direction dir = to_dir (r->get_property ("direction"));
  64       if (dir)
  65         set_grob_direction (text, dir);
  66
  67       SCM mark = r->get_property ("text");
  68
  69       text->set_property ("text", mark);
  70       texts_.push_back (text);
  71     }
  72 }
  73
  74 void
  75 Text_engraver::stop_translation_timestep ()
  76 {
  77   texts_.clear ();
  78   evs_.clear ();
  79 }
  80
  81 Text_engraver::Text_engraver ()
  82 {
  83 }
  84
  85 ADD_TRANSLATOR (Text_engraver,
  86                 /* doc */
  87                 "Create text scripts.",
  88
  89                 /* create */
  90                 "TextScript ",
  91
  92                 /* read */
  93                 "",
  94
  95                 /* write */
  96                 ""
  97                 );