lily/tab-tie-follow-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2010--2011 Carl D. Sorensen
   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 <cctype>
  21 #include <cstdio>
  22
  23 #include "engraver.hh"
  24
  25 using namespace std;
  26
  27 #include "context.hh"
  28 #include "item.hh"
  29 #include "spanner.hh"
  30
  31 #include "translator.icc"
  32
  33 /*
  34    Change tab-note-head properties when a tie is followed by a
  35    slurs or glissando.
  36 */
  37 class Tab_tie_follow_engraver : public Engraver
  38 {
  39   vector<Spanner *> slurs_;
  40   vector<Spanner *> glissandi_;
  41   vector<Item *> note_heads_;
  42
  43 public:
  44   TRANSLATOR_DECLARATIONS (Tab_tie_follow_engraver);
  45
  46 protected:
  47   DECLARE_ACKNOWLEDGER (glissando);
  48   DECLARE_ACKNOWLEDGER (slur);
  49   DECLARE_ACKNOWLEDGER (tab_note_head);
  50
  51   void stop_translation_timestep ();
  52 };
  53
  54 Tab_tie_follow_engraver::Tab_tie_follow_engraver ()
  55 {
  56 }
  57
  58 void
  59 Tab_tie_follow_engraver::acknowledge_glissando (Grob_info info)
  60 {
  61   glissandi_.push_back (info.spanner ());
  62 }
  63
  64 void
  65 Tab_tie_follow_engraver::acknowledge_tab_note_head (Grob_info info)
  66 {
  67   note_heads_.push_back (info.item ());
  68 }
  69
  70 void
  71 Tab_tie_follow_engraver::acknowledge_slur (Grob_info info)
  72 {
  73   slurs_.push_back (info.spanner ());
  74 }
  75
  76 void
  77 Tab_tie_follow_engraver::stop_translation_timestep ()
  78 {
  79   for (vsize k = 0; k < note_heads_.size (); k++)
  80     {
  81       bool spanner_start = false;
  82       for (vsize j = 0; j < slurs_.size (); j++)
  83         {
  84           Item* left_item = slurs_[j]->get_bound (LEFT);
  85           if (left_item)
  86             {
  87               SCM left_cause = left_item->get_property ("cause");
  88               Item *slur_cause = unsmob_item (left_cause);
  89               if (slur_cause ==  note_heads_[k])
  90                 {
  91                   note_heads_[k]->set_property ("span-start", SCM_BOOL_T);
  92                   spanner_start = true;
  93                   break;
  94                 }
  95             }
  96         }
  97       if (!spanner_start)
  98         for (vsize j = 0; j < glissandi_.size (); j++)
  99           {
 100             Item *left_bound = glissandi_[j]->get_bound (LEFT);
 101             if (left_bound == note_heads_[k])
 102               {
 103                 note_heads_[k]->set_property ("span-start", SCM_BOOL_T);
 104                 break;
 105               }
 106           }
 107     }
 108   slurs_.clear ();
 109   glissandi_.clear ();
 110   note_heads_.clear();
 111 }
 112
 113 ADD_ACKNOWLEDGER (Tab_tie_follow_engraver, slur);
 114 ADD_ACKNOWLEDGER (Tab_tie_follow_engraver, glissando);
 115 ADD_ACKNOWLEDGER (Tab_tie_follow_engraver, tab_note_head);
 116
 117
 118 ADD_TRANSLATOR (Tab_tie_follow_engraver,
 119                 /* doc */
 120                 "Adjust TabNoteHead properties when a tie is followed"
 121                 " by a slur or glissando.",
 122
 123                 /* create */
 124                 " ",
 125
 126                 /* read */
 127                 " ",
 128
 129                 /* write */
 130                 " "
 131                 );