2 dynamic-engraver.cc -- implement Dynamic_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "dimensions.hh"
12 #include "paper-column.hh"
13 #include "note-column.hh"
15 #include "side-position-interface.hh"
16 #include "engraver.hh"
17 #include "group-interface.hh"
18 #include "directional-element-interface.hh"
19 #include "translator-group.hh"
20 #include "axis-group-interface.hh"
26 * direction of text-dynamic-event if not equal to direction of
29 - TODO: this engraver is too complicated. We should split it into
30 the handling of the basic grobs and the linespanner
32 - TODO: the line-spanner is not killed after the (de)crescs are
38 print text & hairpin dynamics.
40 class Dynamic_engraver : public Engraver
43 Spanner * finished_cresc_;
48 Music * current_cresc_ev_;
49 Drul_array<Music*> accepted_spanreqs_drul_;
51 Spanner* line_spanner_;
52 Spanner* finished_line_spanner_;
54 Link_array<Note_column> pending_columns_;
55 Link_array<Grob> pending_elements_;
59 TRANSLATOR_DECLARATIONS(Dynamic_engraver );
62 virtual void finalize ();
63 virtual void acknowledge_grob (Grob_info);
64 virtual bool try_music (Music *req);
65 virtual void stop_translation_timestep ();
66 virtual void process_music ();
72 Dynamic_engraver::Dynamic_engraver ()
77 finished_line_spanner_ = 0;
78 current_cresc_ev_ = 0;
82 accepted_spanreqs_drul_[START] = 0;
83 accepted_spanreqs_drul_[STOP] = 0;
87 Dynamic_engraver::try_music (Music * m)
89 if (m->is_mus_type ("absolute-dynamic-event"))
92 TODO: probably broken.
97 else if (m->is_mus_type ("abort-event"))
99 accepted_spanreqs_drul_[LEFT] = 0;
100 accepted_spanreqs_drul_[RIGHT] = 0;
102 Let's not kill the line spanner, since that would fuck up
103 earlier, not-to-be-terminated stuff.
105 It will disappear by itself when stop_translation_timestep
106 () finds that there is nothing to support anymore. */
112 else if (m->is_mus_type ("decrescendo-event")
113 || m->is_mus_type ("crescendo-event"))
115 Direction d = to_dir (m->get_mus_property ("span-direction"));
117 accepted_spanreqs_drul_[d] = m;
118 if (current_cresc_ev_ && d == START)
119 accepted_spanreqs_drul_[STOP] = m;
126 Dynamic_engraver::process_music ()
128 if (accepted_spanreqs_drul_[START] || accepted_spanreqs_drul_[STOP] || script_ev_)
132 line_spanner_ = make_spanner ("DynamicLineSpanner");
134 Music * rq = accepted_spanreqs_drul_[START];
137 announce_grob(line_spanner_, rq ? rq->self_scm(): SCM_EOL);
142 During a (de)crescendo, pending event will not be cleared,
143 and a line-spanner will always be created, as \< \! are already
146 Note: line-spanner must always have at least same duration
147 as (de)crecsendo, b.o. line-breaking.
153 maybe we should leave dynamic texts to the text-engraver and
154 simply acknowledge them?
158 script_ = make_item ("DynamicText");
159 script_->set_grob_property ("text",
160 script_ev_->get_mus_property ("text"));
163 if (Direction d = to_dir (script_ev_->get_mus_property ("direction")))
164 set_grob_direction (line_spanner_, d);
166 Axis_group_interface::add_element (line_spanner_, script_);
168 announce_grob(script_, script_ev_->self_scm());
171 Music *stop_ev = accepted_spanreqs_drul_ [STOP] ?
172 accepted_spanreqs_drul_[STOP] : script_ev_;
174 if (accepted_spanreqs_drul_[STOP] || script_ev_)
177 finish side position alignment if the (de)cresc ends here, and
178 there are no new dynamics.
184 assert (!finished_cresc_ && cresc_);
186 cresc_->set_bound (RIGHT, script_
188 : unsmob_grob (get_property ("currentMusicalColumn")));
189 add_bound_item (line_spanner_, cresc_->get_bound (RIGHT));
192 finished_cresc_ = cresc_;
194 current_cresc_ev_ = 0;
196 else if (accepted_spanreqs_drul_[STOP] )
198 accepted_spanreqs_drul_[STOP]->origin ()->warning(_ ("can't find start of (de)crescendo"));
204 if (accepted_spanreqs_drul_[START])
206 if (current_cresc_ev_)
208 Direction sd = to_dir (current_cresc_ev_->get_mus_property ("span-direction"));
210 ? _ ("already have a crescendo")
211 : _ ("already have a decrescendo");
213 accepted_spanreqs_drul_[START]->origin ()->warning (msg);
214 current_cresc_ev_->origin ()->warning (_("Cresc started here"));
218 current_cresc_ev_ = accepted_spanreqs_drul_[START];
220 if (Direction d = to_dir (current_cresc_ev_->get_mus_property ("direction")))
221 set_grob_direction (line_spanner_, d);
228 ly_symbol2string (current_cresc_ev_->get_mus_property ("name"));
233 if (start_type == "DecrescendoEvent")
234 start_type = "decrescendo";
235 else if (start_type == "CrescendoEvent")
236 start_type = "crescendo";
238 SCM s = get_property ((start_type + "Spanner").to_str0 ());
239 if (!gh_symbol_p (s) || s == ly_symbol2scm ("hairpin"))
241 cresc_ = make_spanner ("Hairpin");
242 cresc_->set_grob_property ("grow-direction",
243 gh_int2scm ((start_type == "crescendo")
244 ? BIGGER : SMALLER));
250 This is a convenient (and legacy) interface to TextSpanners
251 for use in (de)crescendi.
256 cresc_ = make_spanner ("TextSpanner");
257 cresc_->set_grob_property ("style", s);
258 daddy_trans_->set_property ((start_type
259 + "Spanner").to_str0 (), SCM_EOL);
260 s = get_property ((start_type + "Text").to_str0 ());
262 FIXME: use get_markup () to check type.
264 if (gh_string_p (s) || gh_pair_p (s))
266 cresc_->set_grob_property ("edge-text",
267 gh_cons (s, scm_makfrom0str ("")));
268 daddy_trans_->set_property ((start_type + "Text").to_str0 (),
273 cresc_->set_bound (LEFT, script_
275 : unsmob_grob (get_property ("currentMusicalColumn")));
277 Axis_group_interface::add_element (line_spanner_, cresc_);
279 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
281 announce_grob(cresc_, accepted_spanreqs_drul_[START]->self_scm());
287 Dynamic_engraver::stop_translation_timestep ()
290 if (!current_cresc_ev_)
292 finished_line_spanner_ = line_spanner_;
298 accepted_spanreqs_drul_[START] = 0;
299 accepted_spanreqs_drul_[STOP] = 0;
303 Dynamic_engraver::finalize ()
308 && !line_spanner_->live())
312 finished_line_spanner_ = line_spanner_;
321 current_cresc_ev_->origin ()->warning (_ ("unterminated (de)crescendo"));
328 Dynamic_engraver::typeset_all ()
331 remove suicided spanners,
332 ugh: we'll need this for every spanner, beam, slur
333 Hmm, how to do this, cleanly?
334 Maybe just check at typeset_grob ()?
337 && !finished_cresc_->live())
339 if (finished_line_spanner_
340 && !finished_line_spanner_->live())
341 finished_line_spanner_ = 0;
345 if (!finished_cresc_->get_bound (RIGHT))
347 finished_cresc_->set_bound (RIGHT, script_
349 : unsmob_grob (get_property ("currentMusicalColumn")));
351 if (finished_line_spanner_)
352 add_bound_item (finished_line_spanner_,
353 finished_cresc_->get_bound (RIGHT));
355 typeset_grob (finished_cresc_);
361 typeset_grob (script_);
364 if (finished_line_spanner_)
369 extend-spanner-over-elements (finished_line_spanner_);
371 but this is rather kludgy, since finished_line_spanner_
372 typically has a staff-symbol field set , extending it over the
377 Grob * l = finished_line_spanner_->get_bound (LEFT );
378 Grob * r = finished_line_spanner_->get_bound (RIGHT);
380 finished_line_spanner_->set_bound (RIGHT, l);
382 finished_line_spanner_->set_bound (LEFT, r);
386 This is a isolated dynamic apparently, and does not even have
387 any interesting support item.
389 Grob * cc = unsmob_grob (get_property ("currentMusicalColumn"));
390 Item * ci = dynamic_cast<Item*>(cc);
391 finished_line_spanner_->set_bound (RIGHT, ci);
392 finished_line_spanner_->set_bound (LEFT, ci);
395 typeset_grob (finished_line_spanner_);
396 finished_line_spanner_ = 0;
401 Dynamic_engraver::acknowledge_grob (Grob_info i)
406 if (Note_column::has_interface (i.grob_))
409 /* Don't refill killed spanner */
410 && line_spanner_->live())
412 Side_position_interface::add_support (line_spanner_,i.grob_);
413 add_bound_item (line_spanner_,dynamic_cast<Item*> (i.grob_));
416 if (script_ && !script_->get_parent (X_AXIS))
418 script_->set_parent (i.grob_, X_AXIS);
422 else if (Script_interface::has_interface (i.grob_) && script_)
424 SCM p = i.grob_->get_grob_property ("script-priority");
429 DynamicText doesn't really have a script-priority field.
432 && gh_scm2int (p) < gh_scm2int (script_->get_grob_property ("script-priority")))
434 Side_position_interface::add_support (line_spanner_, i.grob_);
439 ENTER_DESCRIPTION(Dynamic_engraver,
441 "This engraver creates hairpins, dynamic texts, and their vertical\n"
442 "alignments. The symbols are collected onto a DynamicLineSpanner grob\n"
443 "which takes care of vertical positioning. "
446 /* creats*/ "DynamicLineSpanner DynamicText Hairpin TextSpanner",
447 /* accepts */ "absolute-dynamic-event crescendo-event decrescendo-event",
448 /* acks */ "note-column-interface script-interface",