lily/double-percent-repeat-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2011 Neil Puttock <n.puttock@gmail.com>
   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 #include "global-context.hh"
  22 #include "international.hh"
  23 #include "item.hh"
  24 #include "side-position-interface.hh"
  25 #include "stream-event.hh"
  26 #include "warn.hh"
  27
  28 #include "translator.icc"
  29
  30 class Double_percent_repeat_engraver : public Engraver
  31 {
  32 public:
  33   TRANSLATOR_DECLARATIONS (Double_percent_repeat_engraver);
  34
  35 protected:
  36   Stream_event *percent_event_;
  37
  38   // moment (global time) where percent started
  39   Moment start_mom_;
  40
  41   DECLARE_TRANSLATOR_LISTENER (double_percent);
  42
  43   void process_music ();
  44 };
  45
  46 Double_percent_repeat_engraver::Double_percent_repeat_engraver ()
  47 {
  48   percent_event_ = 0;
  49 }
  50
  51 IMPLEMENT_TRANSLATOR_LISTENER (Double_percent_repeat_engraver, double_percent);
  52 void
  53 Double_percent_repeat_engraver::listen_double_percent (Stream_event *ev)
  54 {
  55   if (!percent_event_)
  56     {
  57       Moment meas_len (robust_scm2moment (get_property ("measureLength"),
  58                                           Moment (1)));
  59       start_mom_ = now_mom () + meas_len;
  60       get_global_context ()->add_moment_to_process (start_mom_);
  61       percent_event_ = ev;
  62     }
  63   else
  64     ASSIGN_EVENT_ONCE (percent_event_, ev);
  65 }
  66
  67 void
  68 Double_percent_repeat_engraver::process_music ()
  69 {
  70   if (percent_event_ && now_mom ().main_part_ == start_mom_.main_part_)
  71     {
  72       Item *double_percent = make_item ("DoublePercentRepeat",
  73                                         percent_event_->self_scm ());
  74
  75       SCM count = percent_event_->get_property ("repeat-count");
  76       if (count != SCM_EOL && to_boolean (get_property ("countPercentRepeats"))
  77           && check_repeat_count_visibility (context (), count))
  78         {
  79           Item *double_percent_counter
  80             = make_item ("DoublePercentRepeatCounter",
  81                          percent_event_->self_scm ());
  82
  83           SCM text = scm_number_to_string (count, scm_from_int (10));
  84           double_percent_counter->set_property ("text", text);
  85
  86           Side_position_interface::add_support (double_percent_counter,
  87                                                 double_percent);
  88           double_percent_counter->set_parent (double_percent, Y_AXIS);
  89           double_percent_counter->set_parent (double_percent, X_AXIS);
  90         }
  91       // forbid breaks on a % line
  92       context ()->get_score_context ()->set_property ("forbidBreak",
  93                                                       SCM_BOOL_T);
  94       percent_event_ = 0;
  95     }
  96 }
  97
  98 ADD_TRANSLATOR (Double_percent_repeat_engraver,
  99                 /* doc */
 100                 "Make double measure repeats.",
 101
 102                 /* create */
 103                 "DoublePercentRepeat "
 104                 "DoublePercentRepeatCounter ",
 105
 106                 /* read */
 107                 "countPercentRepeats "
 108                 "measureLength "
 109                 "repeatCountVisibility ",
 110
 111                 /* write */
 112                 "forbidBreak "
 113                 );