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>
9 #include "note-column.hh"
10 #include "side-position-interface.hh"
11 #include "engraver.hh"
13 class Text_spanner_engraver : public Engraver
16 TRANSLATOR_DECLARATIONS (Text_spanner_engraver);
18 virtual void finalize ();
19 DECLARE_ACKNOWLEDGER (note_column);
20 virtual bool try_music (Music *);
21 void stop_translation_timestep ();
22 void process_music ();
27 Music *current_event_;
28 Drul_array<Music *> event_drul_;
32 Text_spanner_engraver::Text_spanner_engraver ()
37 event_drul_[START] = 0;
38 event_drul_[STOP] = 0;
42 Text_spanner_engraver::try_music (Music *m)
44 if (m->is_mus_type ("text-span-event"))
46 Direction d = to_dir (m->get_property ("span-direction"));
55 Text_spanner_engraver::process_music ()
57 if (event_drul_[STOP])
60 event_drul_[STOP]->origin ()->warning (_ ("can't find start of text spanner"));
69 if (event_drul_[START])
72 event_drul_[START]->origin ()->warning (_ ("already have a text spanner"));
75 current_event_ = event_drul_[START];
76 span_ = make_spanner ("TextSpanner", event_drul_[START]->self_scm ());
78 Side_position_interface::set_axis (span_, Y_AXIS);
79 event_drul_[START] = 0;
85 Text_spanner_engraver::acknowledge_note_column (Grob_info info)
87 Spanner *spans[2] ={span_, finished_};
88 for (int i = 0; i < 2; i++)
92 Side_position_interface::add_support (spans[i], info.grob ());
93 add_bound_item (spans[i], dynamic_cast<Item *> (info.grob ()));
99 Text_spanner_engraver::typeset_all ()
103 if (!finished_->get_bound (RIGHT))
105 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
106 finished_->set_bound (RIGHT, e);
113 Text_spanner_engraver::stop_translation_timestep ()
115 if (span_ && !span_->get_bound (LEFT))
117 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
118 span_->set_bound (LEFT, e);
122 event_drul_[START] = 0;
123 event_drul_[STOP] = 0;
127 Text_spanner_engraver::finalize ()
132 current_event_->origin ()->warning (_ ("unterminated text spanner"));
138 #include "translator.icc"
139 ADD_ACKNOWLEDGER (Text_spanner_engraver, note_column);
140 ADD_TRANSLATOR (Text_spanner_engraver,
141 /* doc */ "Create text spanner from a Music.",
142 /* create */ "TextSpanner",
143 /* accept */ "text-span-event",