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--2008 Han-Wen Nienhuys <hanwen@lilypond.org>
   7
   8 */
   9
  10 #include "engraver.hh"
  11
  12 #include "accidental-placement.hh"
  13 #include "item.hh"
  14 #include "script-column.hh"
  15 #include "side-position-interface.hh"
  16
  17 #include "translator.icc"
  18
  19
  20 /**
  21    Find potentially colliding scripts, and put them in a
  22    Script_row
  23 */
  24 class Script_row_engraver : public Engraver
  25 {
  26   Grob *script_row_;
  27   vector<Grob*> scripts_;
  28
  29 public:
  30   TRANSLATOR_DECLARATIONS (Script_row_engraver);
  31 protected:
  32   DECLARE_ACKNOWLEDGER (accidental_placement);
  33   DECLARE_ACKNOWLEDGER (side_position);
  34   void process_acknowledged ();
  35   void stop_translation_timestep ();
  36 };
  37
  38 Script_row_engraver::Script_row_engraver ()
  39 {
  40   script_row_ = 0;
  41 }
  42
  43 void
  44 Script_row_engraver::stop_translation_timestep ()
  45 {
  46   if (script_row_)
  47     {
  48       for (vsize i = 0; i < scripts_.size (); i++)
  49         if (Accidental_placement::has_interface (scripts_[i])
  50             || Side_position_interface::get_axis (scripts_[i]) == X_AXIS)
  51           Script_column::add_side_positioned (script_row_, scripts_[i]);
  52     }
  53
  54   scripts_.clear ();
  55   script_row_ = 0;
  56 }
  57
  58 void
  59 Script_row_engraver::acknowledge_side_position (Grob_info inf)
  60 {
  61   Item *thing = dynamic_cast<Item *> (inf.grob ());
  62   if (thing)
  63     {
  64       if (!Item::is_non_musical (thing))
  65         scripts_.push_back (thing);
  66     }
  67 }
  68
  69
  70 void
  71 Script_row_engraver::acknowledge_accidental_placement (Grob_info inf)
  72 {
  73   scripts_.push_back (inf.grob ());
  74 }
  75
  76
  77 void
  78 Script_row_engraver::process_acknowledged ()
  79 {
  80   if (!script_row_ && scripts_.size () > 1)
  81     script_row_ = make_item ("ScriptRow", SCM_EOL);
  82 }
  83
  84
  85 ADD_ACKNOWLEDGER (Script_row_engraver, accidental_placement);
  86 ADD_ACKNOWLEDGER (Script_row_engraver, side_position);
  87 ADD_TRANSLATOR (Script_row_engraver,
  88                 /* doc */
  89                 "Determine order in horizontal side position elements.",
  90
  91                 /* create */
  92                 "ScriptRow ",
  93
  94                 /* read */
  95                 "",
  96
  97                 /* write */
  98                 ""
  99                 );