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 "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 ("decrescendo-event")
98 || m->is_mus_type ("crescendo-event"))
100 Direction d = to_dir (m->get_mus_property ("span-direction"));
102 accepted_spanreqs_drul_[d] = m;
103 if (current_cresc_ev_ && d == START)
104 accepted_spanreqs_drul_[STOP] = m;
111 Dynamic_engraver::process_music ()
113 if (accepted_spanreqs_drul_[START] || accepted_spanreqs_drul_[STOP] || script_ev_)
117 line_spanner_ = make_spanner ("DynamicLineSpanner");
119 Music * rq = accepted_spanreqs_drul_[START];
122 announce_grob(line_spanner_, rq ? rq->self_scm(): SCM_EOL);
127 During a (de)crescendo, pending event will not be cleared,
128 and a line-spanner will always be created, as \< \! are already
131 Note: line-spanner must always have at least same duration
132 as (de)crecsendo, b.o. line-breaking.
138 maybe we should leave dynamic texts to the text-engraver and
139 simply acknowledge them?
143 script_ = make_item ("DynamicText");
144 script_->set_grob_property ("text",
145 script_ev_->get_mus_property ("text"));
148 if (Direction d = to_dir (script_ev_->get_mus_property ("direction")))
149 set_grob_direction (line_spanner_, d);
151 Axis_group_interface::add_element (line_spanner_, script_);
153 announce_grob(script_, script_ev_->self_scm());
156 Music *stop_ev = accepted_spanreqs_drul_ [STOP] ?
157 accepted_spanreqs_drul_[STOP] : script_ev_;
159 if (accepted_spanreqs_drul_[STOP] || script_ev_)
162 finish side position alignment if the (de)cresc ends here, and
163 there are no new dynamics.
169 assert (!finished_cresc_ && cresc_);
171 cresc_->set_bound (RIGHT, script_
173 : unsmob_grob (get_property ("currentMusicalColumn")));
174 add_bound_item (line_spanner_, cresc_->get_bound (RIGHT));
177 finished_cresc_ = cresc_;
179 current_cresc_ev_ = 0;
181 else if (accepted_spanreqs_drul_[STOP] )
183 accepted_spanreqs_drul_[STOP]->origin ()->warning(_ ("can't find start of (de)crescendo"));
189 if (accepted_spanreqs_drul_[START])
191 if (current_cresc_ev_)
193 Direction sd = to_dir (current_cresc_ev_->get_mus_property ("span-direction"));
195 ? _ ("already have a crescendo")
196 : _ ("already have a decrescendo");
198 accepted_spanreqs_drul_[START]->origin ()->warning (msg);
199 current_cresc_ev_->origin ()->warning (_("Cresc started here"));
203 current_cresc_ev_ = accepted_spanreqs_drul_[START];
205 if (Direction d = to_dir (current_cresc_ev_->get_mus_property ("direction")))
206 set_grob_direction (line_spanner_, d);
213 ly_symbol2string (current_cresc_ev_->get_mus_property ("name"));
218 if (start_type == "DecrescendoEvent")
219 start_type = "decrescendo";
220 else if (start_type == "CrescendoEvent")
221 start_type = "crescendo";
223 SCM s = get_property ((start_type + "Spanner").to_str0 ());
224 if (!gh_symbol_p (s) || s == ly_symbol2scm ("hairpin"))
226 cresc_ = make_spanner ("Hairpin");
227 cresc_->set_grob_property ("grow-direction",
228 gh_int2scm ((start_type == "crescendo")
229 ? BIGGER : SMALLER));
235 This is a convenient (and legacy) interface to TextSpanners
236 for use in (de)crescendi.
241 cresc_ = make_spanner ("TextSpanner");
242 cresc_->set_grob_property ("style", s);
243 daddy_trans_->set_property ((start_type
244 + "Spanner").to_str0 (), SCM_EOL);
245 s = get_property ((start_type + "Text").to_str0 ());
247 FIXME: use get_markup () to check type.
249 if (gh_string_p (s) || gh_pair_p (s))
251 cresc_->set_grob_property ("edge-text",
252 gh_cons (s, scm_makfrom0str ("")));
253 daddy_trans_->set_property ((start_type + "Text").to_str0 (),
258 cresc_->set_bound (LEFT, script_
260 : unsmob_grob (get_property ("currentMusicalColumn")));
262 Axis_group_interface::add_element (line_spanner_, cresc_);
264 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
266 announce_grob(cresc_, accepted_spanreqs_drul_[START]->self_scm());
272 Dynamic_engraver::stop_translation_timestep ()
275 if (!current_cresc_ev_)
277 finished_line_spanner_ = line_spanner_;
283 accepted_spanreqs_drul_[START] = 0;
284 accepted_spanreqs_drul_[STOP] = 0;
288 Dynamic_engraver::finalize ()
293 && !line_spanner_->live())
297 finished_line_spanner_ = line_spanner_;
306 current_cresc_ev_->origin ()->warning (_ ("unterminated (de)crescendo"));
313 Dynamic_engraver::typeset_all ()
316 remove suicided spanners,
317 ugh: we'll need this for every spanner, beam, slur
318 Hmm, how to do this, cleanly?
319 Maybe just check at typeset_grob ()?
322 && !finished_cresc_->live())
324 if (finished_line_spanner_
325 && !finished_line_spanner_->live())
326 finished_line_spanner_ = 0;
330 if (!finished_cresc_->get_bound (RIGHT))
332 finished_cresc_->set_bound (RIGHT, script_
334 : unsmob_grob (get_property ("currentMusicalColumn")));
336 if (finished_line_spanner_)
337 add_bound_item (finished_line_spanner_,
338 finished_cresc_->get_bound (RIGHT));
340 typeset_grob (finished_cresc_);
346 typeset_grob (script_);
349 if (finished_line_spanner_)
354 extend-spanner-over-elements (finished_line_spanner_);
356 but this is rather kludgy, since finished_line_spanner_
357 typically has a staff-symbol field set , extending it over the
362 Grob * l = finished_line_spanner_->get_bound (LEFT );
363 Grob * r = finished_line_spanner_->get_bound (RIGHT);
365 finished_line_spanner_->set_bound (RIGHT, l);
367 finished_line_spanner_->set_bound (LEFT, r);
371 This is a isolated dynamic apparently, and does not even have
372 any interesting support item.
374 Grob * cc = unsmob_grob (get_property ("currentMusicalColumn"));
375 Item * ci = dynamic_cast<Item*>(cc);
376 finished_line_spanner_->set_bound (RIGHT, ci);
377 finished_line_spanner_->set_bound (LEFT, ci);
380 typeset_grob (finished_line_spanner_);
381 finished_line_spanner_ = 0;
386 Dynamic_engraver::acknowledge_grob (Grob_info i)
391 if (Note_column::has_interface (i.grob_))
394 /* Don't refill killed spanner */
395 && line_spanner_->live())
397 Side_position_interface::add_support (line_spanner_,i.grob_);
398 add_bound_item (line_spanner_,dynamic_cast<Item*> (i.grob_));
401 if (script_ && !script_->get_parent (X_AXIS))
403 script_->set_parent (i.grob_, X_AXIS);
407 else if (Script_interface::has_interface (i.grob_) && script_)
409 SCM p = i.grob_->get_grob_property ("script-priority");
414 DynamicText doesn't really have a script-priority field.
417 && gh_scm2int (p) < gh_scm2int (script_->get_grob_property ("script-priority")))
419 Side_position_interface::add_support (line_spanner_, i.grob_);
424 ENTER_DESCRIPTION(Dynamic_engraver,
426 "This engraver creates hairpins, dynamic texts, and their vertical\n"
427 "alignments. The symbols are collected onto a DynamicLineSpanner grob\n"
428 "which takes care of vertical positioning. "
431 /* creats*/ "DynamicLineSpanner DynamicText Hairpin TextSpanner",
432 /* accepts */ "absolute-dynamic-event crescendo-event decrescendo-event",
433 /* acks */ "note-column-interface script-interface",