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--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "engraver.hh"
  10 #include "spanner.hh"
  11 #include "pointer-group-interface.hh"
  12 #include "side-position-interface.hh"
  13 #include "axis-group-interface.hh"
  14 #include "align-interface.hh"
  15 #include "text-interface.hh"
  16 #include "system.hh"
  17
  18 #include "translator.icc"
  19
  20 class Instrument_name_engraver : public Engraver
  21 {
  22 public:
  23   TRANSLATOR_DECLARATIONS (Instrument_name_engraver);
  24
  25 protected:
  26   Spanner *text_spanner_;
  27
  28   virtual void finalize ();
  29   DECLARE_ACKNOWLEDGER (axis_group);
  30   void process_music ();
  31 };
  32
  33 Instrument_name_engraver::Instrument_name_engraver ()
  34 {
  35   text_spanner_ = 0;
  36 }
  37
  38 void
  39 Instrument_name_engraver::process_music ()
  40 {
  41   if (!text_spanner_)
  42     {
  43       SCM long_text = get_property ("instrument");
  44       SCM short_text = get_property ("instr");
  45
  46       if (!(Text_interface::is_markup (long_text)
  47             || Text_interface::is_markup (short_text)))
  48         {
  49           long_text = get_property ("vocalName");
  50           short_text = get_property ("vocNam");
  51         }
  52
  53       if (Text_interface::is_markup (long_text)
  54           || Text_interface::is_markup (short_text))
  55         {
  56           text_spanner_ = make_spanner ("InstrumentName", SCM_EOL);
  57
  58           Grob *col = unsmob_grob (get_property ("currentCommandColumn"));
  59           text_spanner_->set_bound (LEFT, col);
  60           text_spanner_->set_property ("text", short_text);
  61           text_spanner_->set_property ("long-text", long_text);
  62         }
  63     }
  64 }
  65
  66 void
  67 Instrument_name_engraver::acknowledge_axis_group (Grob_info info)
  68 {
  69   if (text_spanner_
  70       && dynamic_cast<Spanner *> (info.grob ())
  71       && Axis_group_interface::has_axis (info.grob (), Y_AXIS)
  72       && (!Align_interface::has_interface (info.grob ())))
  73     {
  74       Grob *staff = info.grob();
  75       Pointer_group_interface::add_grob (text_spanner_, ly_symbol2scm ("elements"), staff);
  76       Side_position_interface::add_support (text_spanner_, staff);
  77     }
  78 }
  79
  80 void
  81 Instrument_name_engraver::finalize ()
  82 {
  83   if (text_spanner_)
  84     {
  85       text_spanner_->set_bound (RIGHT,
  86                                 unsmob_grob (get_property ("currentCommandColumn")));
  87
  88       Pointer_group_interface::set_ordered (text_spanner_, ly_symbol2scm ("elements"), false);
  89
  90       System *system = get_root_system (text_spanner_);
  91
  92       /*
  93         UGH, should handle this in Score_engraver.
  94        */
  95       if (system)
  96         Axis_group_interface::add_element (system, text_spanner_);
  97       else
  98         text_spanner_->programming_error ("can't find root system");
  99     }
 100 }
 101
 102 #include "translator.icc"
 103
 104 ADD_ACKNOWLEDGER (Instrument_name_engraver, axis_group);
 105
 106 ADD_TRANSLATOR (Instrument_name_engraver,
 107
 108                 /* doc */
 109                 "Creates a system start text for instrument or vocal names.",
 110
 111                 /* create */
 112                 "InstrumentName ",
 113
 114                 /* accept */
 115                 "",
 116
 117                 /* read */
 118                 "vocNam vocalName instrument instr "
 119                 "currentCommandColumn",
 120
 121                 /* write */ "");