lily/concurrent-hairpin-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2011--2012 Mike Solomon <mike@mikesolomon.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 "international.hh"
  23 #include "pointer-group-interface.hh"
  24 #include "spanner.hh"
  25 #include "stream-event.hh"
  26 #include "warn.hh"
  27 #include "item.hh"
  28
  29 #include "translator.icc"
  30
  31 class Concurrent_hairpin_engraver : public Engraver
  32 {
  33 public:
  34   TRANSLATOR_DECLARATIONS (Concurrent_hairpin_engraver);
  35
  36 protected:
  37   DECLARE_ACKNOWLEDGER (hairpin);
  38   DECLARE_END_ACKNOWLEDGER (hairpin);
  39
  40   void stop_translation_timestep ();
  41   void finalize ();
  42
  43 private:
  44   vector<Grob *> arriving_hairpins_;
  45   vector<Grob *> departing_hairpins_;
  46   vector<Grob *> hairpins_hanging_out_;
  47 };
  48
  49 Concurrent_hairpin_engraver::Concurrent_hairpin_engraver ()
  50 {
  51 }
  52
  53 void
  54 Concurrent_hairpin_engraver::acknowledge_hairpin (Grob_info info)
  55 {
  56   arriving_hairpins_.push_back (info.grob ());
  57 }
  58
  59 void
  60 Concurrent_hairpin_engraver::acknowledge_end_hairpin (Grob_info info)
  61 {
  62   departing_hairpins_.push_back (info.grob ());
  63 }
  64
  65 void
  66 Concurrent_hairpin_engraver::stop_translation_timestep ()
  67 {
  68   for (vsize i = 0; i < departing_hairpins_.size (); i++)
  69     for (vsize j = 0; j < hairpins_hanging_out_.size (); j++)
  70       if (departing_hairpins_[i] == hairpins_hanging_out_[j])
  71         {
  72           hairpins_hanging_out_.erase (hairpins_hanging_out_.begin () + j);
  73           break;
  74         }
  75   if (arriving_hairpins_.size ())
  76     {
  77       if (arriving_hairpins_.size () > 1)
  78         for (vsize i = 0; i < arriving_hairpins_.size () - 1; i++)
  79           for (vsize j = i + 1; j < arriving_hairpins_.size (); j++)
  80             {
  81               Pointer_group_interface::add_grob (arriving_hairpins_[i], ly_symbol2scm ("concurrent-hairpins"), arriving_hairpins_[j]);
  82               Pointer_group_interface::add_grob (arriving_hairpins_[j], ly_symbol2scm ("concurrent-hairpins"), arriving_hairpins_[i]);
  83             }
  84
  85       for (vsize i = 0; i < arriving_hairpins_.size (); i++)
  86         for (vsize j = 0; j < hairpins_hanging_out_.size (); j++)
  87           {
  88             Pointer_group_interface::add_grob (arriving_hairpins_[i], ly_symbol2scm ("concurrent-hairpins"), hairpins_hanging_out_[j]);
  89             Pointer_group_interface::add_grob (hairpins_hanging_out_[j], ly_symbol2scm ("concurrent-hairpins"), arriving_hairpins_[i]);
  90           }
  91     }
  92   hairpins_hanging_out_.insert (hairpins_hanging_out_.end (), arriving_hairpins_.begin (), arriving_hairpins_.end ());
  93   arriving_hairpins_.resize (0);
  94   departing_hairpins_.resize (0);
  95 }
  96
  97 void
  98 Concurrent_hairpin_engraver::finalize ()
  99 {
 100   hairpins_hanging_out_.resize (0);
 101 }
 102
 103 ADD_ACKNOWLEDGER (Concurrent_hairpin_engraver, hairpin);
 104 ADD_END_ACKNOWLEDGER (Concurrent_hairpin_engraver, hairpin);
 105
 106 ADD_TRANSLATOR (Concurrent_hairpin_engraver,
 107                 /* doc */
 108                 "Collect concurrent hairpins.",
 109
 110                 /* create */
 111                 "",
 112
 113                 /* read */
 114                 "",
 115
 116                 /* write */
 117                 ""
 118                );