2 spacing-engraver.cc -- implement Spacing_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "paper-column.hh"
10 #include "engraver.hh"
12 #include "note-spacing.hh"
13 #include "staff-spacing.hh"
14 #include "pointer-group-interface.hh"
25 Rhythmic_tuple (Grob_info i, Moment m)
30 static int time_compare (Rhythmic_tuple const &, Rhythmic_tuple const &);
34 Acknowledge rhythmic elements, for initializing spacing fields in
37 should be the last one of the toplevel context
39 class Spacing_engraver : public Engraver
41 PQueue<Rhythmic_tuple> playing_durations_;
42 Array<Rhythmic_tuple> now_durations_;
43 Array<Rhythmic_tuple> stopped_durations_;
47 TRANSLATOR_DECLARATIONS (Spacing_engraver);
50 DECLARE_ACKNOWLEDGER (staff_spacing);
51 DECLARE_ACKNOWLEDGER (note_spacing);
52 DECLARE_ACKNOWLEDGER (rhythmic_head);
54 void start_translation_timestep ();
55 void stop_translation_timestep ();
56 void process_music ();
57 virtual void finalize ();
61 compare (Rhythmic_tuple const &a, Rhythmic_tuple const &b)
63 return Rhythmic_tuple::time_compare (a, b);
67 Rhythmic_tuple::time_compare (Rhythmic_tuple const &h1,
68 Rhythmic_tuple const &h2)
70 return (h1.end_ - h2.end_).main_part_.sign ();
73 Spacing_engraver::Spacing_engraver ()
79 Spacing_engraver::process_music ()
83 spacing_ = make_spanner ("SpacingSpanner", SCM_EOL);
84 spacing_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
89 Spacing_engraver::finalize ()
93 Grob *p = unsmob_grob (get_property ("currentCommandColumn"));
95 spacing_->set_bound (RIGHT, p);
101 Spacing_engraver::acknowledge_note_spacing (Grob_info i)
103 Pointer_group_interface::add_grob (spacing_, ly_symbol2scm ("wishes"), i.grob ());
107 Spacing_engraver::acknowledge_staff_spacing (Grob_info i)
109 Pointer_group_interface::add_grob (spacing_, ly_symbol2scm ("wishes"), i.grob ());
113 Spacing_engraver::acknowledge_rhythmic_head (Grob_info i)
115 if (i.grob ()->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface"))
116 || i.grob ()->internal_has_interface (ly_symbol2scm ("multi-measure-interface")))
120 only pay attention to durations that are not grace notes.
122 if (!now_.grace_part_)
124 Music *r = i.music_cause ();
125 if (r && r->is_mus_type ("rhythmic-event"))
127 Moment len = r->get_length ();
128 Rhythmic_tuple t (i, now_mom () + len);
129 now_durations_.push (t);
135 Spacing_engraver::stop_translation_timestep ()
137 Paper_column *musical_column
138 = dynamic_cast<Paper_column *> (unsmob_grob (get_property ("currentMusicalColumn")));
140 SCM proportional = get_property ("proportionalNotationDuration");
141 if (unsmob_moment (proportional))
143 musical_column->set_property ("shortest-playing-duration", proportional);
144 musical_column->set_property ("shortest-starter-duration", proportional);
148 Moment shortest_playing;
149 shortest_playing.set_infinite (1);
150 for (int i = 0; i < playing_durations_.size (); i++)
152 Music *mus = playing_durations_[i].info_.music_cause ();
155 Moment m = mus->get_length ();
156 shortest_playing = min (shortest_playing, m);
160 starter.set_infinite (1);
162 for (int i = 0; i < now_durations_.size (); i++)
164 Moment m = now_durations_[i].info_.music_cause ()->get_length ();
167 starter = min (starter, m);
168 playing_durations_.insert (now_durations_[i]);
171 now_durations_.clear ();
173 shortest_playing = min (shortest_playing, starter);
176 assert (starter.to_bool ());
177 SCM sh = shortest_playing.smobbed_copy ();
178 SCM st = starter.smobbed_copy ();
180 musical_column->set_property ("shortest-playing-duration", sh);
181 musical_column->set_property ("shortest-starter-duration", st);
185 Spacing_engraver::start_translation_timestep ()
188 stopped_durations_.clear ();
189 while (playing_durations_.size () && playing_durations_.front ().end_ < now_)
190 playing_durations_.delmin ();
191 while (playing_durations_.size () && playing_durations_.front ().end_ == now_)
192 stopped_durations_.push (playing_durations_.get ());
195 #include "translator.icc"
197 ADD_ACKNOWLEDGER (Spacing_engraver, staff_spacing);
198 ADD_ACKNOWLEDGER (Spacing_engraver, note_spacing);
199 ADD_ACKNOWLEDGER (Spacing_engraver, rhythmic_head);
201 ADD_TRANSLATOR (Spacing_engraver,
202 /* descr */ "make a SpacingSpanner and do bookkeeping of shortest starting and playing notes ",
203 /* creats*/ "SpacingSpanner",
205 /* reads */ "currentMusicalColumn currentCommandColumn proportionalNotationDuration",