2 text-spanner-engraver.cc -- implement Text_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>
11 #include "international.hh"
12 #include "note-column.hh"
13 #include "side-position-interface.hh"
15 #include "stream-event.hh"
17 #include "translator.icc"
19 class Text_spanner_engraver : public Engraver
22 TRANSLATOR_DECLARATIONS (Text_spanner_engraver);
24 virtual void finalize ();
25 DECLARE_ACKNOWLEDGER (note_column);
26 DECLARE_TRANSLATOR_LISTENER (text_span);
27 void stop_translation_timestep ();
28 void process_music ();
33 Stream_event *current_event_;
34 Drul_array<Stream_event *> event_drul_;
38 Text_spanner_engraver::Text_spanner_engraver ()
43 event_drul_[START] = 0;
44 event_drul_[STOP] = 0;
47 IMPLEMENT_TRANSLATOR_LISTENER (Text_spanner_engraver, text_span);
49 Text_spanner_engraver::listen_text_span (Stream_event *ev)
51 Direction d = to_dir (ev->get_property ("span-direction"));
52 ASSIGN_EVENT_ONCE (event_drul_[d], ev);
56 Text_spanner_engraver::process_music ()
58 if (event_drul_[STOP])
61 event_drul_[STOP]->origin ()->warning (_ ("cannot find start of text spanner"));
70 if (event_drul_[START])
73 event_drul_[START]->origin ()->warning (_ ("already have a text spanner"));
76 current_event_ = event_drul_[START];
77 span_ = make_spanner ("TextSpanner", event_drul_[START]->self_scm ());
79 Side_position_interface::set_axis (span_, Y_AXIS);
80 event_drul_[START] = 0;
86 Text_spanner_engraver::acknowledge_note_column (Grob_info info)
88 Spanner *spans[2] ={span_, finished_};
89 for (int i = 0; i < 2; i++)
93 Side_position_interface::add_support (spans[i], info.grob ());
94 add_bound_item (spans[i], info.grob ());
100 Text_spanner_engraver::typeset_all ()
104 if (!finished_->get_bound (RIGHT))
106 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
107 finished_->set_bound (RIGHT, e);
114 Text_spanner_engraver::stop_translation_timestep ()
116 if (span_ && !span_->get_bound (LEFT))
118 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
119 span_->set_bound (LEFT, e);
123 event_drul_[START] = 0;
124 event_drul_[STOP] = 0;
128 Text_spanner_engraver::finalize ()
133 current_event_->origin ()->warning (_ ("unterminated text spanner"));
139 ADD_ACKNOWLEDGER (Text_spanner_engraver, note_column);
140 ADD_TRANSLATOR (Text_spanner_engraver,
141 /* doc */ "Create text spanner from an event.",
142 /* create */ "TextSpanner",