2 dynamic-engraver.cc -- implement Dynamic_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "axis-group-interface.hh"
11 #include "dimensions.hh"
12 #include "directional-element-interface.hh"
13 #include "engraver.hh"
15 #include "group-interface.hh"
17 #include "interval.hh"
19 #include "note-column.hh"
20 #include "paper-column.hh"
21 #include "script-interface.hh"
22 #include "side-position-interface.hh"
23 #include "staff-symbol-referencer.hh"
29 * direction of text-dynamic-event if not equal to direction of
32 - TODO: this engraver is too complicated. We should split it into
33 the handling of the basic grobs and the linespanner
35 - TODO: the line-spanner is not killed after the (de)crescs are
41 print text & hairpin dynamics.
43 class Dynamic_engraver : public Engraver
46 Spanner *line_spanner_;
49 Spanner *finished_line_spanner_;
50 Spanner *finished_cresc_;
53 Music *current_cresc_ev_;
55 Drul_array<Music*> accepted_spanreqs_drul_;
57 Link_array<Note_column> pending_columns_;
58 Link_array<Grob> pending_elements_;
62 TRANSLATOR_DECLARATIONS (Dynamic_engraver);
65 virtual void finalize ();
66 virtual void acknowledge_grob (Grob_info);
67 virtual bool try_music (Music *req);
68 virtual void stop_translation_timestep ();
69 virtual void process_music ();
75 Dynamic_engraver::Dynamic_engraver ()
80 finished_line_spanner_ = 0;
81 current_cresc_ev_ = 0;
85 accepted_spanreqs_drul_[START] = 0;
86 accepted_spanreqs_drul_[STOP] = 0;
90 Dynamic_engraver::try_music (Music *m)
92 if (m->is_mus_type ("absolute-dynamic-event"))
95 TODO: probably broken.
100 else if (m->is_mus_type ("decrescendo-event")
101 || m->is_mus_type ("crescendo-event"))
103 Direction d = to_dir (m->get_property ("span-direction"));
105 accepted_spanreqs_drul_[d] = m;
106 if (current_cresc_ev_ && d == START)
107 accepted_spanreqs_drul_[STOP] = m;
114 Dynamic_engraver::process_music ()
116 if (accepted_spanreqs_drul_[START] || accepted_spanreqs_drul_[STOP] || script_ev_)
120 Music * rq = accepted_spanreqs_drul_[START];
121 line_spanner_ = make_spanner ("DynamicLineSpanner", rq ? rq->self_scm (): SCM_EOL );
129 During a (de)crescendo, pending event will not be cleared,
130 and a line-spanner will always be created, as \< \! are already
133 Note: line-spanner must always have at least same duration
134 as (de)crecsendo, b.o. line-breaking.
139 maybe we should leave dynamic texts to the text-engraver and
140 simply acknowledge them?
144 script_ = make_item ("DynamicText", script_ev_->self_scm ());
145 script_->set_property ("text",
146 script_ev_->get_property ("text"));
149 if (Direction d = to_dir (script_ev_->get_property ("direction")))
150 set_grob_direction (line_spanner_, d);
152 Axis_group_interface::add_element (line_spanner_, script_);
155 Music *stop_ev = accepted_spanreqs_drul_ [STOP] ?
156 accepted_spanreqs_drul_[STOP] : script_ev_;
158 if (accepted_spanreqs_drul_[STOP] || script_ev_)
161 finish side position alignment if the (de)cresc ends here, and
162 there are no new dynamics.
168 assert (!finished_cresc_ && cresc_);
170 cresc_->set_bound (RIGHT, script_
172 : unsmob_grob (get_property ("currentMusicalColumn")));
173 add_bound_item (line_spanner_, cresc_->get_bound (RIGHT));
176 finished_cresc_ = cresc_;
178 current_cresc_ev_ = 0;
180 else if (accepted_spanreqs_drul_[STOP])
182 accepted_spanreqs_drul_[STOP]->origin ()->warning (_ ("can't find start of (de)crescendo"));
188 if (accepted_spanreqs_drul_[START])
190 if (current_cresc_ev_)
192 String msg = _ ("already have a decrescendo");
193 if (current_cresc_ev_->is_mus_type ("decrescendo-event"))
194 msg = _ ("already have a crescendo");
196 accepted_spanreqs_drul_[START]->origin ()->warning (msg);
197 current_cresc_ev_->origin ()->warning (_("Cresc started here"));
201 current_cresc_ev_ = accepted_spanreqs_drul_[START];
203 if (Direction d = to_dir (current_cresc_ev_->get_property ("direction")))
204 set_grob_direction (line_spanner_, d);
211 ly_symbol2string (current_cresc_ev_->get_property ("name"));
216 if (start_type == "DecrescendoEvent")
217 start_type = "decrescendo";
218 else if (start_type == "CrescendoEvent")
219 start_type = "crescendo";
221 SCM s = get_property ((start_type + "Spanner").to_str0 ());
222 if (!scm_is_symbol (s) || s == ly_symbol2scm ("hairpin"))
224 cresc_ = make_spanner ("Hairpin", accepted_spanreqs_drul_[START]->self_scm ());
227 Pointer_group_interface::add_grob (finished_cresc_,
228 ly_symbol2scm ("adjacent-hairpins"),
231 Pointer_group_interface::add_grob (cresc_,
232 ly_symbol2scm ("adjacent-hairpins"),
235 cresc_->set_property ("grow-direction",
236 scm_int2num ((start_type == "crescendo")
237 ? BIGGER : SMALLER));
243 This is a convenient (and legacy) interface to TextSpanners
244 for use in (de)crescendi.
249 cresc_ = make_spanner ("DynamicTextSpanner", accepted_spanreqs_drul_[START]->self_scm ());
250 cresc_->set_property ("style", s);
251 context ()->set_property ((start_type
252 + "Spanner").to_str0 (), SCM_EOL);
253 s = get_property ((start_type + "Text").to_str0 ());
255 FIXME: use get_markup () to check type.
257 if (scm_is_string (s) || scm_is_pair (s))
259 cresc_->set_property ("edge-text",
260 scm_cons (s, scm_makfrom0str ("")));
261 context ()->set_property ((start_type + "Text").to_str0 (),
268 cresc_->set_bound (LEFT, script_);
269 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
272 Axis_group_interface::add_element (line_spanner_, cresc_);
278 Dynamic_engraver::stop_translation_timestep ()
281 if (!current_cresc_ev_)
283 finished_line_spanner_ = line_spanner_;
288 if (cresc_ && !cresc_->get_bound (LEFT))
290 cresc_->set_bound (LEFT, unsmob_grob (get_property ("currentMusicalColumn")));
291 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
295 accepted_spanreqs_drul_[START] = 0;
296 accepted_spanreqs_drul_[STOP] = 0;
300 Dynamic_engraver::finalize ()
305 && !line_spanner_->is_live ())
309 finished_line_spanner_ = line_spanner_;
314 && !cresc_->is_live ())
318 current_cresc_ev_->origin ()->warning (_ ("unterminated (de)crescendo"));
325 Dynamic_engraver::typeset_all ()
329 if (!finished_cresc_->get_bound (RIGHT))
331 finished_cresc_->set_bound (RIGHT, script_
333 : unsmob_grob (get_property ("currentMusicalColumn")));
335 if (finished_line_spanner_)
336 add_bound_item (finished_line_spanner_,
337 finished_cresc_->get_bound (RIGHT));
343 if (finished_line_spanner_)
348 extend-spanner-over-elements (finished_line_spanner_);
350 but this is rather kludgy, since finished_line_spanner_
351 typically has a staff-symbol field set , extending it over the
356 Grob * l = finished_line_spanner_->get_bound (LEFT);
357 Grob * r = finished_line_spanner_->get_bound (RIGHT);
359 finished_line_spanner_->set_bound (RIGHT, l);
361 finished_line_spanner_->set_bound (LEFT, r);
365 This is a isolated dynamic apparently, and does not even have
366 any interesting support item.
368 Grob * cc = unsmob_grob (get_property ("currentMusicalColumn"));
369 Item * ci = dynamic_cast<Item*>(cc);
370 finished_line_spanner_->set_bound (RIGHT, ci);
371 finished_line_spanner_->set_bound (LEFT, ci);
374 finished_line_spanner_ = 0;
379 Dynamic_engraver::acknowledge_grob (Grob_info info)
384 if (Note_column::has_interface (info.grob_))
387 /* Don't refill killed spanner */
388 && line_spanner_->is_live ())
390 Side_position_interface::add_support (line_spanner_,info.grob_);
391 add_bound_item (line_spanner_,dynamic_cast<Item*> (info.grob_));
394 if (script_ && !script_->get_parent (X_AXIS))
396 SCM head = scm_last_pair (info.grob_->get_property ("note-heads"));
397 if (scm_is_pair (head))
398 script_->set_parent (unsmob_grob (scm_car (head)), X_AXIS);
403 if (cresc_ && !cresc_->get_bound (LEFT))
405 cresc_->set_bound (LEFT, info.grob_);
406 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
410 else if (Script_interface::has_interface (info.grob_) && script_)
412 SCM p = info.grob_->get_property ("script-priority");
417 DynamicText doesn't really have a script-priority field.
419 if (scm_is_number (p)
421 < scm_to_int (script_->get_property ("script-priority")))
422 Side_position_interface::add_support (line_spanner_, info.grob_);
426 ENTER_DESCRIPTION (Dynamic_engraver,
428 "This engraver creates hairpins, dynamic texts, and their vertical\n"
429 "alignments. The symbols are collected onto a DynamicLineSpanner grob\n"
430 "which takes care of vertical positioning. "
433 /* creats*/ "DynamicLineSpanner DynamicText Hairpin TextSpanner",
434 /* accepts */ "absolute-dynamic-event crescendo-event decrescendo-event",
435 /* acks */ "note-column-interface script-interface",