lily/instrument-name-engraver.cc

   1 /*
   2   instrument-name-engraver.cc -- implement Instrument_name_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "engraver.hh"
  10 #include "pointer-group-interface.hh"
  11 #include "side-position-interface.hh"
  12 #include "axis-group-interface.hh"
  13 #include "align-interface.hh"
  14 #include "text-interface.hh"
  15 #include "system.hh"
  16
  17 #include "translator.icc"
  18
  19 class Instrument_name_engraver : public Engraver
  20 {
  21 public:
  22   TRANSLATOR_DECLARATIONS (Instrument_name_engraver);
  23
  24 protected:
  25   Spanner *text_spanner_;
  26
  27   SCM long_text_;
  28   SCM short_text_;
  29
  30   vector<Grob *> axis_groups_;
  31
  32   virtual void finalize ();
  33   DECLARE_ACKNOWLEDGER (axis_group);
  34   void process_music ();
  35   void start_spanner ();
  36   void consider_start_spanner ();
  37   void stop_spanner ();
  38 };
  39
  40 Instrument_name_engraver::Instrument_name_engraver ()
  41 {
  42   text_spanner_ = 0;
  43
  44   long_text_ = SCM_EOL;
  45   short_text_ = SCM_EOL;
  46 }
  47
  48 void
  49 Instrument_name_engraver::process_music ()
  50 {
  51   consider_start_spanner ();
  52 }
  53
  54 void
  55 Instrument_name_engraver::consider_start_spanner ()
  56 {
  57   SCM long_text = get_property ("instrumentName");
  58   SCM short_text = get_property ("shortInstrumentName");
  59
  60   if (!(Text_interface::is_markup (long_text)
  61         || Text_interface::is_markup (short_text)))
  62     {
  63       long_text = get_property ("vocalName");
  64       short_text = get_property ("shortVocalName");
  65     }
  66
  67   if ((Text_interface::is_markup (long_text)
  68        || Text_interface::is_markup (short_text))
  69       && (!text_spanner_
  70           || short_text_ != short_text
  71           || long_text_ != long_text))
  72     {
  73       if (text_spanner_)
  74         stop_spanner ();
  75
  76       short_text_ = short_text;
  77       long_text_ = long_text;
  78
  79       start_spanner ();
  80     }
  81 }
  82
  83 void
  84 Instrument_name_engraver::start_spanner ()
  85 {
  86   text_spanner_ = make_spanner ("InstrumentName", SCM_EOL);
  87
  88   Grob *col = unsmob_grob (get_property ("currentCommandColumn"));
  89   text_spanner_->set_bound (LEFT, col);
  90   text_spanner_->set_property ("text", short_text_);
  91   text_spanner_->set_property ("long-text", long_text_);
  92
  93   /*
  94     UGH, should handle this in Score_engraver.
  95   */
  96   Grob *system = unsmob_grob (get_property ("rootSystem"));
  97   if (system)
  98     Axis_group_interface::add_element (system, text_spanner_);
  99   else
 100     text_spanner_->programming_error ("cannot find root system");
 101 }
 102
 103 void
 104 Instrument_name_engraver::acknowledge_axis_group (Grob_info info)
 105 {
 106   if (dynamic_cast<Spanner *> (info.grob ())
 107       && Axis_group_interface::has_axis (info.grob (), Y_AXIS)
 108
 109       /* ugh. */
 110
 111       && !info.grob ()->internal_has_interface (ly_symbol2scm ("dynamic-interface"))
 112       && !info.grob ()->internal_has_interface (ly_symbol2scm ("piano-pedal-interface"))
 113       && (!Align_interface::has_interface (info.grob ())))
 114     {
 115       axis_groups_.push_back (info.grob ());
 116     }
 117 }
 118
 119 void
 120 Instrument_name_engraver::finalize ()
 121 {
 122   if (text_spanner_)
 123     stop_spanner ();
 124 }
 125
 126 void
 127 Instrument_name_engraver::stop_spanner ()
 128 {
 129   for (vsize i = 0; i < axis_groups_.size (); i++)
 130     Pointer_group_interface::add_grob (text_spanner_,
 131                                        ly_symbol2scm ("elements"),
 132                                        axis_groups_[i]);
 133
 134   text_spanner_->set_bound (RIGHT,
 135                             unsmob_grob (get_property ("currentCommandColumn")));
 136
 137   Pointer_group_interface::set_ordered (text_spanner_,
 138                                         ly_symbol2scm ("elements"),
 139                                         false);
 140
 141   text_spanner_ = 0;
 142 }
 143
 144
 145 ADD_ACKNOWLEDGER (Instrument_name_engraver, axis_group);
 146
 147 ADD_TRANSLATOR (Instrument_name_engraver,
 148                 /* doc */
 149                 "Create a system start text for instrument or vocal names.",
 150
 151                 /* create */
 152                 "InstrumentName ",
 153
 154                 /* read */
 155                 "currentCommandColumn "
 156                 "shortInstrumentName "
 157                 "instrumentName "
 158                 "shortVocalName "
 159                 "vocalName ",
 160
 161                 /* write */
 162                 ""
 163                 );