lily/script-row-engraver.cc

   1 /*
   2   script-row-engraver.cc -- implement Script_row_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2006 Han-Wen Nienhuys <hanwen@lilypond.org>
   7
   8 */
   9
  10 #include "engraver.hh"
  11
  12 #include "accidental-placement.hh"
  13 #include "script-column.hh"
  14 #include "side-position-interface.hh"
  15
  16 #include "translator.icc"
  17
  18
  19 /**
  20    Find potentially colliding scripts, and put them in a
  21    Script_row
  22 */
  23 class Script_row_engraver : public Engraver
  24 {
  25   Grob *script_row_;
  26   vector<Grob*> scripts_;
  27
  28 public:
  29   TRANSLATOR_DECLARATIONS (Script_row_engraver);
  30 protected:
  31   DECLARE_ACKNOWLEDGER (accidental_placement);
  32   DECLARE_ACKNOWLEDGER (side_position);
  33   void process_acknowledged ();
  34   void stop_translation_timestep ();
  35 };
  36
  37 Script_row_engraver::Script_row_engraver ()
  38 {
  39   script_row_ = 0;
  40 }
  41
  42 void
  43 Script_row_engraver::stop_translation_timestep ()
  44 {
  45   if (script_row_)
  46     {
  47       for (vsize i = 0; i < scripts_.size (); i++)
  48         if (Accidental_placement::has_interface (scripts_[i])
  49             || Side_position_interface::get_axis (scripts_[i]) == X_AXIS)
  50           Script_column::add_side_positioned (script_row_, scripts_[i]);
  51     }
  52
  53   scripts_.clear ();
  54   script_row_ = 0;
  55 }
  56
  57 void
  58 Script_row_engraver::acknowledge_side_position (Grob_info inf)
  59 {
  60   Item *thing = dynamic_cast<Item *> (inf.grob ());
  61   if (thing)
  62     {
  63       if (!Item::is_non_musical (thing))
  64         scripts_.push_back (thing);
  65     }
  66 }
  67
  68
  69 void
  70 Script_row_engraver::acknowledge_accidental_placement (Grob_info inf)
  71 {
  72   scripts_.push_back (inf.grob ());
  73 }
  74
  75
  76 void
  77 Script_row_engraver::process_acknowledged ()
  78 {
  79   if (!script_row_ && scripts_.size () > 1)
  80     script_row_ = make_item ("ScriptRow", SCM_EOL);
  81 }
  82
  83
  84 ADD_ACKNOWLEDGER (Script_row_engraver, accidental_placement);
  85 ADD_ACKNOWLEDGER (Script_row_engraver, side_position);
  86 ADD_TRANSLATOR (Script_row_engraver,
  87                 /* doc */ "Determine order in horizontal side position elements. ",
  88                 /* create */ "ScriptRow ",
  89                 /* read */ "",
  90                 /* write */ "");