2 text-spanner-engraver.cc -- implement Text_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2006 Jan Nieuwenhuizen <janneke@gnu.org>
11 #include "international.hh"
12 #include "note-column.hh"
13 #include "side-position-interface.hh"
15 class Text_spanner_engraver : public Engraver
18 TRANSLATOR_DECLARATIONS (Text_spanner_engraver);
20 virtual void finalize ();
21 DECLARE_ACKNOWLEDGER (note_column);
22 virtual bool try_music (Music *);
23 void stop_translation_timestep ();
24 void process_music ();
29 Music *current_event_;
30 Drul_array<Music *> event_drul_;
34 Text_spanner_engraver::Text_spanner_engraver ()
39 event_drul_[START] = 0;
40 event_drul_[STOP] = 0;
44 Text_spanner_engraver::try_music (Music *m)
46 if (m->is_mus_type ("text-span-event"))
48 Direction d = to_dir (m->get_property ("span-direction"));
57 Text_spanner_engraver::process_music ()
59 if (event_drul_[STOP])
62 event_drul_[STOP]->origin ()->warning (_ ("can't find start of text spanner"));
71 if (event_drul_[START])
74 event_drul_[START]->origin ()->warning (_ ("already have a text spanner"));
77 current_event_ = event_drul_[START];
78 span_ = make_spanner ("TextSpanner", event_drul_[START]->self_scm ());
80 Side_position_interface::set_axis (span_, Y_AXIS);
81 event_drul_[START] = 0;
87 Text_spanner_engraver::acknowledge_note_column (Grob_info info)
89 Spanner *spans[2] ={span_, finished_};
90 for (int i = 0; i < 2; i++)
94 Side_position_interface::add_support (spans[i], info.grob ());
95 add_bound_item (spans[i], dynamic_cast<Item *> (info.grob ()));
101 Text_spanner_engraver::typeset_all ()
105 if (!finished_->get_bound (RIGHT))
107 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
108 finished_->set_bound (RIGHT, e);
115 Text_spanner_engraver::stop_translation_timestep ()
117 if (span_ && !span_->get_bound (LEFT))
119 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
120 span_->set_bound (LEFT, e);
124 event_drul_[START] = 0;
125 event_drul_[STOP] = 0;
129 Text_spanner_engraver::finalize ()
134 current_event_->origin ()->warning (_ ("unterminated text spanner"));
140 #include "translator.icc"
141 ADD_ACKNOWLEDGER (Text_spanner_engraver, note_column);
142 ADD_TRANSLATOR (Text_spanner_engraver,
143 /* doc */ "Create text spanner from a Music.",
144 /* create */ "TextSpanner",
145 /* accept */ "text-span-event",