2 slur-engraver.cc -- implement Slur_engraver
4 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "note-column.hh"
11 #include "translator-group.hh"
12 #include "engraver.hh"
16 TODO: junk nested slur functionality.
18 class Slur_engraver
: public Engraver
20 Link_array
<Music
> events_
;
21 Link_array
<Music
> new_slur_evs_
;
22 Link_array
<Grob
> slur_stack_
;
23 Link_array
<Grob
> end_slurs_
;
26 void set_melisma (bool);
29 virtual bool try_music (Music
*);
30 virtual void acknowledge_grob (Grob_info
);
31 virtual void stop_translation_timestep ();
32 virtual void start_translation_timestep ();
33 virtual void finalize ();
34 virtual void process_acknowledged_grobs ();
37 TRANSLATOR_DECLARATIONS (Slur_engraver
);
40 Slur_engraver::Slur_engraver ()
42 last_start_
= Moment (-1);
46 Slur_engraver::try_music (Music
*ev
)
48 if (ev
->is_mus_type ("abort-event"))
50 for (int i
= 0; i
< slur_stack_
.size (); i
++)
52 slur_stack_
[i
]->suicide ();
55 for (int i
= 0; i
< end_slurs_
.size (); i
++)
57 end_slurs_
[i
]->suicide ();
61 new_slur_evs_
.clear ();
63 else if (ev
->is_mus_type ("slur-event"))
66 Let's not start more than one slur per moment.
68 Direction d
= to_dir (ev
->get_mus_property ("span-direction"));
71 if (now_mom () > last_start_
)
73 new_slur_evs_
.push (ev
);
74 last_start_
= now_mom ();
78 But we swallow other slur events.
89 for (int j
= new_slur_evs_
.size(); j
--;)
91 Direction nd
= to_dir (new_slur_evs_
[j
]->get_mus_property ("span-direction"));
97 new_slur_evs_
.push (ev
);
105 Slur_engraver::set_melisma (bool m
)
107 daddy_trans_
->set_property ("slurMelismaBusy", m
? SCM_BOOL_T
:SCM_BOOL_F
);
111 Slur_engraver::acknowledge_grob (Grob_info info
)
113 if (Note_column::has_interface (info
.grob_
))
116 for (int i
= 0; i
< slur_stack_
.size (); i
++)
117 Slur::add_column (slur_stack_
[i
], e
);
118 for (int i
= 0; i
< end_slurs_
.size (); i
++)
119 Slur::add_column (end_slurs_
[i
], e
);
124 Slur_engraver::finalize ()
126 for (int i
= 0; i
< slur_stack_
.size (); i
++)
129 typeset_grob (slur_stack_
[i
]);
132 Let's not typeset unterminated stuff
134 slur_stack_
[i
]->suicide ();
137 slur_stack_
.clear ();
139 for (int i
=0; i
< events_
.size (); i
++)
141 events_
[i
]->origin ()->warning (_ ("unterminated slur"));
146 Slur_engraver::process_acknowledged_grobs ()
148 Link_array
<Grob
> start_slurs
;
149 for (int i
=0; i
< new_slur_evs_
.size (); i
++)
151 Music
* slur_ev
= new_slur_evs_
[i
];
152 // end slur: move the slur to other array
153 Direction d
= to_dir (slur_ev
->get_mus_property ("span-direction"));
156 if (slur_stack_
.empty ())
157 /* How to shut up this warning, when Voice_devnull_engraver has
158 eaten start event? */
159 slur_ev
->origin ()->warning (_f ("can't find start of slur"));
162 Grob
* slur
= slur_stack_
.pop ();
164 end_slurs_
.push (slur
);
170 // push a new slur onto stack.
171 // (use temp. array to wait for all slur STOPs)
172 Grob
* slur
= new Spanner (get_property ("Slur"));
173 Slur::set_interface (slur
); // cannot remove yet!
176 if (Direction updown
= to_dir (slur_ev
->get_mus_property ("direction")))
178 slur
->set_grob_property ("direction", gh_int2scm (updown
));
181 start_slurs
.push (slur
);
182 events_
.push (slur_ev
);
183 announce_grob (slur
, slur_ev
->self_scm ());
186 for (int i
=0; i
< start_slurs
.size (); i
++)
187 slur_stack_
.push (start_slurs
[i
]);
188 new_slur_evs_
.clear ();
192 Slur_engraver::stop_translation_timestep ()
194 for (int i
= 0; i
< end_slurs_
.size (); i
++)
196 typeset_grob (end_slurs_
[i
]);
202 Slur_engraver::start_translation_timestep ()
204 new_slur_evs_
.clear ();
205 SCM m
= get_property ("automaticMelismata");
208 set_melisma (slur_stack_
.size ());
214 ENTER_DESCRIPTION (Slur_engraver
,
215 /* descr */ "Build slurs from Slur_evs",
217 /* accepts */ "slur-event",
218 /* acks */ "note-column-interface",
219 /* reads */ "slurMelismaBusy",