lily/script-row-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2006--2011 Han-Wen Nienhuys <hanwen@lilypond.org>
   5
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "engraver.hh"
  22
  23 #include "accidental-placement.hh"
  24 #include "item.hh"
  25 #include "script-column.hh"
  26 #include "side-position-interface.hh"
  27
  28 #include "translator.icc"
  29
  30
  31 /**
  32    Find potentially colliding scripts, and put them in a
  33    Script_row
  34 */
  35 class Script_row_engraver : public Engraver
  36 {
  37   Grob *script_row_;
  38   vector<Grob*> scripts_;
  39
  40 public:
  41   TRANSLATOR_DECLARATIONS (Script_row_engraver);
  42 protected:
  43   DECLARE_ACKNOWLEDGER (accidental_placement);
  44   DECLARE_ACKNOWLEDGER (side_position);
  45   void process_acknowledged ();
  46   void stop_translation_timestep ();
  47 };
  48
  49 Script_row_engraver::Script_row_engraver ()
  50 {
  51   script_row_ = 0;
  52 }
  53
  54 void
  55 Script_row_engraver::stop_translation_timestep ()
  56 {
  57   if (script_row_)
  58     {
  59       for (vsize i = 0; i < scripts_.size (); i++)
  60         if (Accidental_placement::has_interface (scripts_[i])
  61             || Side_position_interface::get_axis (scripts_[i]) == X_AXIS)
  62           Script_column::add_side_positioned (script_row_, scripts_[i]);
  63     }
  64
  65   scripts_.clear ();
  66   script_row_ = 0;
  67 }
  68
  69 void
  70 Script_row_engraver::acknowledge_side_position (Grob_info inf)
  71 {
  72   Item *thing = dynamic_cast<Item *> (inf.grob ());
  73   if (thing)
  74     {
  75       if (!Item::is_non_musical (thing))
  76         scripts_.push_back (thing);
  77     }
  78 }
  79
  80
  81 void
  82 Script_row_engraver::acknowledge_accidental_placement (Grob_info inf)
  83 {
  84   scripts_.push_back (inf.grob ());
  85 }
  86
  87
  88 void
  89 Script_row_engraver::process_acknowledged ()
  90 {
  91   if (!script_row_ && scripts_.size () > 1)
  92     script_row_ = make_item ("ScriptRow", SCM_EOL);
  93 }
  94
  95
  96 ADD_ACKNOWLEDGER (Script_row_engraver, accidental_placement);
  97 ADD_ACKNOWLEDGER (Script_row_engraver, side_position);
  98 ADD_TRANSLATOR (Script_row_engraver,
  99                 /* doc */
 100                 "Determine order in horizontal side position elements.",
 101
 102                 /* create */
 103                 "ScriptRow ",
 104
 105                 /* read */
 106                 "",
 107
 108                 /* write */
 109                 ""
 110                 );