2 instrument-name-engraver.cc -- implement Instrument_name_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "engraver.hh"
12 #include "bar-line.hh"
13 #include "system-start-delimiter.hh"
14 #include "side-position-interface.hh"
15 #include "align-interface.hh"
16 #include "axis-group-interface.hh"
17 #include "translator-group.hh"
18 #include "text-item.hh"
20 class Instrument_name_engraver : public Engraver
27 TRANSLATOR_DECLARATIONS(Instrument_name_engraver);
29 virtual void initialize ();
30 virtual void acknowledge_grob (Grob_info);
31 virtual void stop_translation_timestep ();
32 virtual void process_music ();
37 Instrument_name_engraver::Instrument_name_engraver ()
45 Instrument_name_engraver::initialize ()
47 daddy_trans_->set_property ("instrumentSupport", SCM_EOL);
51 Instrument_name_engraver::stop_translation_timestep ()
55 text_->set_grob_property ("side-support-elements",
56 get_property ("instrumentSupport"));
63 Instrument_name_engraver::create_text ()
67 SCM txt = get_property ("instrument");
69 if (now_mom () > Moment (0))
70 txt = get_property ("instr");
77 text_ = new Item (get_property ("InstrumentName"));
79 if (text_->get_grob_property ("text") != txt)
80 text_->set_grob_property ("text", txt);
82 if (new_markup_p (txt))
83 text_->set_grob_property ("molecule-callback", new_markup_brewer());
86 text_->set_parent (delim_, Y_AXIS);
88 announce_grob (text_, SCM_EOL);
93 Instrument_name_engraver::acknowledge_grob (Grob_info i)
95 if (Bar_line::has_interface (i.grob_))
100 if (dynamic_cast<Spanner*> (i.grob_)
101 && i.grob_->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
105 Hang the instrument names on the staves, but not on the alignment
106 groups enclosing that staff. The alignment has no real location,
107 but is only a vehicle for the placement routine it contains, and
108 therefore the location of its refpoint won't be very useful.
110 We could also just use stavesFound, but lets keep this working
111 without staffs as well.
113 if (dynamic_cast<Spanner*> (i.grob_)
114 && ((Axis_group_interface::has_interface (i.grob_)
115 && Axis_group_interface::axis_b (i.grob_, Y_AXIS)))
116 && !Align_interface::has_interface (i.grob_))
118 SCM nl = gh_cons (i.grob_->self_scm (),
119 get_property ("instrumentSupport"));
121 daddy_trans_->set_property ("instrumentSupport", nl);
126 Instrument_name_engraver::process_music ()
129 Also create text if barlines in other groups. This allows
130 a name to be attached to lyrics or chords.
132 if (gh_string_p (get_property ("whichBar")))
136 ENTER_DESCRIPTION(Instrument_name_engraver,
137 /* descr */ " Prints the name of the instrument (specified by "
138 " @code{Staff.instrument} and @code{Staff.instr}) "
139 "at the left of the staff. ",
140 /* creats*/ "InstrumentName",
142 /* acks */ "bar-line-interface axis-group-interface",
143 /* reads */ "instrument instr",