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 ();
67 virtual void start_translation_timestep ();
73 Dynamic_engraver::Dynamic_engraver ()
78 finished_line_spanner_ = 0;
79 current_cresc_ev_ = 0;
83 accepted_spanreqs_drul_[START] = 0;
84 accepted_spanreqs_drul_[STOP] = 0;
88 Dynamic_engraver::start_translation_timestep ()
91 accepted_spanreqs_drul_[START] = 0;
92 accepted_spanreqs_drul_[STOP] = 0;
96 Dynamic_engraver::try_music (Music * m)
98 if (m->is_mus_type ("absolute-dynamic-event"))
101 TODO: probably broken.
106 else if (m->is_mus_type ("abort-event"))
108 accepted_spanreqs_drul_[LEFT] = 0;
109 accepted_spanreqs_drul_[RIGHT] = 0;
111 Let's not kill the line spanner, since that would fuck up
112 earlier, not-to-be-terminated stuff.
114 It will disappear by itself when stop_translation_timestep
115 () finds that there is nothing to support anymore. */
121 else if (m->is_mus_type ("decrescendo-event")
122 || m->is_mus_type ("crescendo-event"))
124 Direction d = to_dir (m->get_mus_property ("span-direction"));
126 accepted_spanreqs_drul_[d] = m;
127 if (current_cresc_ev_ && d == START)
128 accepted_spanreqs_drul_[STOP] = m;
135 Dynamic_engraver::process_music ()
137 if (accepted_spanreqs_drul_[START] || accepted_spanreqs_drul_[STOP] || script_ev_)
141 line_spanner_ = new Spanner (get_property ("DynamicLineSpanner"));
143 Music * rq = accepted_spanreqs_drul_[START];
146 announce_grob(line_spanner_, rq ? rq->self_scm(): SCM_EOL);
151 During a (de)crescendo, pending event will not be cleared,
152 and a line-spanner will always be created, as \< \! are already
155 Note: line-spanner must always have at least same duration
156 as (de)crecsendo, b.o. line-breaking.
162 maybe we should leave dynamic texts to the text-engraver and
163 simply acknowledge them?
167 script_ = new Item (get_property ("DynamicText"));
168 script_->set_grob_property ("text",
169 script_ev_->get_mus_property ("text"));
172 if (Direction d = to_dir (script_ev_->get_mus_property ("direction")))
173 Directional_element_interface::set (line_spanner_, d);
175 Axis_group_interface::add_element (line_spanner_, script_);
177 announce_grob(script_, script_ev_->self_scm());
180 Music *stop_ev = accepted_spanreqs_drul_ [STOP] ?
181 accepted_spanreqs_drul_[STOP] : script_ev_;
183 if (accepted_spanreqs_drul_[STOP] || script_ev_)
186 finish side position alignment if the (de)cresc ends here, and
187 there are no new dynamics.
193 assert (!finished_cresc_ && cresc_);
195 cresc_->set_bound (RIGHT, script_
197 : unsmob_grob (get_property ("currentMusicalColumn")));
198 add_bound_item (line_spanner_, cresc_->get_bound (RIGHT));
201 finished_cresc_ = cresc_;
203 current_cresc_ev_ = 0;
205 else if (accepted_spanreqs_drul_[STOP] )
207 accepted_spanreqs_drul_[STOP]->origin ()->warning(_ ("can't find start of (de)crescendo"));
213 if (accepted_spanreqs_drul_[START])
215 if (current_cresc_ev_)
217 Direction sd = to_dir (current_cresc_ev_->get_mus_property ("span-direction"));
219 ? _ ("already have a crescendo")
220 : _ ("already have a decrescendo");
222 accepted_spanreqs_drul_[START]->origin ()->warning (msg);
223 current_cresc_ev_->origin ()->warning (_("Cresc started here"));
227 current_cresc_ev_ = accepted_spanreqs_drul_[START];
229 if (Direction d = to_dir (current_cresc_ev_->get_mus_property ("direction")))
230 Directional_element_interface::set (line_spanner_, d);
237 ly_symbol2string (current_cresc_ev_->get_mus_property ("name"));
242 if (start_type == "DecrescendoEvent")
243 start_type = "decrescendo";
244 else if (start_type == "CrescendoEvent")
245 start_type = "crescendo";
247 SCM s = get_property ((start_type + "Spanner").to_str0 ());
248 if (!gh_symbol_p (s) || s == ly_symbol2scm ("hairpin"))
250 cresc_ = new Spanner (get_property ("Hairpin"));
251 cresc_->set_grob_property ("grow-direction",
252 gh_int2scm ((start_type == "crescendo")
253 ? BIGGER : SMALLER));
259 This is a convenient (and legacy) interface to TextSpanners
260 for use in (de)crescendi.
265 cresc_ = new Spanner (get_property ("TextSpanner"));
266 cresc_->set_grob_property ("style", s);
267 daddy_trans_->set_property ((start_type
268 + "Spanner").to_str0 (), SCM_EOL);
269 s = get_property ((start_type + "Text").to_str0 ());
271 FIXME: use get_markup () to check type.
273 if (gh_string_p (s) || gh_pair_p (s))
275 cresc_->set_grob_property ("edge-text",
276 gh_cons (s, scm_makfrom0str ("")));
277 daddy_trans_->set_property ((start_type + "Text").to_str0 (),
282 cresc_->set_bound (LEFT, script_
284 : unsmob_grob (get_property ("currentMusicalColumn")));
286 Axis_group_interface::add_element (line_spanner_, cresc_);
288 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
290 announce_grob(cresc_, accepted_spanreqs_drul_[START]->self_scm());
296 Dynamic_engraver::stop_translation_timestep ()
299 if (!current_cresc_ev_)
301 finished_line_spanner_ = line_spanner_;
308 Dynamic_engraver::finalize ()
313 && !line_spanner_->live())
317 finished_line_spanner_ = line_spanner_;
326 current_cresc_ev_->origin ()->warning (_ ("unterminated (de)crescendo"));
333 Dynamic_engraver::typeset_all ()
336 remove suicided spanners,
337 ugh: we'll need this for every spanner, beam, slur
338 Hmm, how to do this, cleanly?
339 Maybe just check at typeset_grob ()?
342 && !finished_cresc_->live())
344 if (finished_line_spanner_
345 && !finished_line_spanner_->live())
346 finished_line_spanner_ = 0;
350 if (!finished_cresc_->get_bound (RIGHT))
352 finished_cresc_->set_bound (RIGHT, script_
354 : unsmob_grob (get_property ("currentMusicalColumn")));
356 if (finished_line_spanner_)
357 add_bound_item (finished_line_spanner_,
358 finished_cresc_->get_bound (RIGHT));
360 typeset_grob (finished_cresc_);
366 typeset_grob (script_);
369 if (finished_line_spanner_)
371 /* To make sure that this works */
372 Side_position_interface::add_staff_support (finished_line_spanner_);
377 extend-spanner-over-elements (finished_line_spanner_);
379 but this is rather kludgy, since finished_line_spanner_
380 typically has a staff-symbol field set , extending it over the
385 Grob * l = finished_line_spanner_->get_bound (LEFT );
386 Grob * r = finished_line_spanner_->get_bound (RIGHT);
388 finished_line_spanner_->set_bound (RIGHT, l);
390 finished_line_spanner_->set_bound (LEFT, r);
394 This is a isolated dynamic apparently, and does not even have
395 any interesting support item.
397 Grob * cc = unsmob_grob (get_property ("currentMusicalColumn"));
398 Item * ci = dynamic_cast<Item*>(cc);
399 finished_line_spanner_->set_bound (RIGHT, ci);
400 finished_line_spanner_->set_bound (LEFT, ci);
403 typeset_grob (finished_line_spanner_);
404 finished_line_spanner_ = 0;
409 Dynamic_engraver::acknowledge_grob (Grob_info i)
414 if (Note_column::has_interface (i.grob_))
417 /* Don't refill killed spanner */
418 && line_spanner_->live())
420 Side_position_interface::add_support (line_spanner_,i.grob_);
421 add_bound_item (line_spanner_,dynamic_cast<Item*> (i.grob_));
424 if (script_ && !script_->get_parent (X_AXIS))
426 script_->set_parent (i.grob_, X_AXIS);
430 else if (Script_interface::has_interface (i.grob_) && script_)
432 SCM p = i.grob_->get_grob_property ("script-priority");
437 DynamicText doesn't really have a script-priority field.
440 && gh_scm2int (p) < gh_scm2int (script_->get_grob_property ("script-priority")))
442 Side_position_interface::add_support (line_spanner_, i.grob_);
447 ENTER_DESCRIPTION(Dynamic_engraver,
449 "This engraver creates hairpins, dynamic texts, and their vertical\n"
450 "alignments. The symbols are collected onto a DynamicLineSpanner grob\n"
451 "which takes care of vertical positioning. "
454 /* creats*/ "DynamicLineSpanner DynamicText Hairpin TextSpanner",
455 /* accepts */ "absolute-dynamic-event crescendo-event decrescendo-event",
456 /* acks */ "note-column-interface script-interface",