2 dynamic-engraver.cc -- implement Dynamic_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 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_req_;
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_req_ = 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"));
125 accepted_spanreqs_drul_[d] = m;
132 Dynamic_engraver::process_music ()
134 if (accepted_spanreqs_drul_[START] || accepted_spanreqs_drul_[STOP] || script_req_)
138 line_spanner_ = new Spanner (get_property ("DynamicLineSpanner"));
140 Music * rq = accepted_spanreqs_drul_[START];
143 announce_grob(line_spanner_, rq ? rq->self_scm(): SCM_EOL);
148 During a (de)crescendo, pending event will not be cleared,
149 and a line-spanner will always be created, as \< \! are already
152 Note: line-spanner must always have at least same duration
153 as (de)crecsendo, b.o. line-breaking.
159 maybe we should leave dynamic texts to the text-engraver and
160 simply acknowledge them?
164 script_ = new Item (get_property ("DynamicText"));
165 script_->set_grob_property ("text",
166 script_req_->get_mus_property ("text"));
169 if (Direction d = to_dir (script_req_->get_mus_property ("direction")))
170 Directional_element_interface::set (line_spanner_, d);
172 Axis_group_interface::add_element (line_spanner_, script_);
174 announce_grob(script_, script_req_->self_scm());
177 if (accepted_spanreqs_drul_[STOP])
180 finish side position alignment if the (de)cresc ends here, and
181 there are no new dynamics.
186 accepted_spanreqs_drul_[STOP]->origin ()->warning
187 (_ ("can't find start of (de)crescendo"));
188 accepted_spanreqs_drul_[STOP] = 0;
192 assert (!finished_cresc_ && cresc_);
194 cresc_->set_bound (RIGHT, script_
196 : unsmob_grob (get_property ("currentMusicalColumn")));
197 add_bound_item (line_spanner_, cresc_->get_bound (RIGHT));
200 finished_cresc_ = cresc_;
202 current_cresc_req_ = 0;
206 if (accepted_spanreqs_drul_[START])
208 if (current_cresc_req_)
210 Direction sd = to_dir (current_cresc_req_->get_mus_property ("span-direction"));
212 ? _ ("already have a crescendo")
213 : _ ("already have a decrescendo");
215 accepted_spanreqs_drul_[START]->origin ()->warning (msg);
216 current_cresc_req_->origin ()->warning (_("Cresc started here"));
220 current_cresc_req_ = accepted_spanreqs_drul_[START];
227 ly_symbol2string (current_cresc_req_->get_mus_property ("name"));
232 if (start_type == "DecrescendoEvent")
233 start_type = "decrescendo";
234 else if (start_type == "CrescendoEvent")
235 start_type = "crescendo";
237 SCM s = get_property ((start_type + "Spanner").to_str0 ());
238 if (!gh_symbol_p (s) || s == ly_symbol2scm ("hairpin"))
240 cresc_ = new Spanner (get_property ("Hairpin"));
241 cresc_->set_grob_property ("grow-direction",
242 gh_int2scm ((start_type == "crescendo")
243 ? BIGGER : SMALLER));
247 This is a convenient (and legacy) interface to TextSpanners
248 for use in (de)crescendi.
253 cresc_ = new Spanner (get_property ("TextSpanner"));
254 cresc_->set_grob_property ("type", s);
255 daddy_trans_->set_property ((start_type
256 + "Spanner").to_str0 (), SCM_EOL);
257 s = get_property ((start_type + "Text").to_str0 ());
259 FIXME: use get_markup () to check type.
261 if (gh_string_p (s) || gh_pair_p (s))
263 cresc_->set_grob_property ("edge-text",
264 gh_cons (s, scm_makfrom0str ("")));
265 daddy_trans_->set_property ((start_type + "Text").to_str0 (),
270 cresc_->set_bound (LEFT, script_
272 : unsmob_grob (get_property ("currentMusicalColumn")));
274 Axis_group_interface::add_element (line_spanner_, cresc_);
276 add_bound_item (line_spanner_, cresc_->get_bound (LEFT));
278 announce_grob(cresc_, accepted_spanreqs_drul_[START]->self_scm());
284 Dynamic_engraver::stop_translation_timestep ()
287 if (!current_cresc_req_)
289 finished_line_spanner_ = line_spanner_;
296 Dynamic_engraver::finalize ()
301 && !line_spanner_->live())
305 finished_line_spanner_ = line_spanner_;
314 current_cresc_req_->origin ()->warning (_ ("unterminated (de)crescendo"));
321 Dynamic_engraver::typeset_all ()
324 remove suicided spanners,
325 ugh: we'll need this for every spanner, beam, slur
326 Hmm, how to do this, cleanly?
327 Maybe just check at typeset_grob ()?
330 && !finished_cresc_->live())
332 if (finished_line_spanner_
333 && !finished_line_spanner_->live())
334 finished_line_spanner_ = 0;
338 if (!finished_cresc_->get_bound (RIGHT))
340 finished_cresc_->set_bound (RIGHT, script_
342 : unsmob_grob (get_property ("currentMusicalColumn")));
344 if (finished_line_spanner_)
345 add_bound_item (finished_line_spanner_,
346 finished_cresc_->get_bound (RIGHT));
348 typeset_grob (finished_cresc_);
354 typeset_grob (script_);
357 if (finished_line_spanner_)
359 /* To make sure that this works */
360 Side_position_interface::add_staff_support (finished_line_spanner_);
365 extend-spanner-over-elements (finished_line_spanner_);
367 but this is rather kludgy, since finished_line_spanner_
368 typically has a staff-symbol field set , extending it over the
373 Grob * l = finished_line_spanner_->get_bound (LEFT );
374 Grob * r = finished_line_spanner_->get_bound (RIGHT);
376 finished_line_spanner_->set_bound (RIGHT, l);
378 finished_line_spanner_->set_bound (LEFT, r);
382 This is a isolated dynamic apparently, and does not even have
383 any interesting support item.
385 Grob * cc = unsmob_grob (get_property ("currentMusicalColumn"));
386 Item * ci = dynamic_cast<Item*>(cc);
387 finished_line_spanner_->set_bound (RIGHT, ci);
388 finished_line_spanner_->set_bound (LEFT, ci);
391 typeset_grob (finished_line_spanner_);
392 finished_line_spanner_ = 0;
397 Dynamic_engraver::acknowledge_grob (Grob_info i)
402 if (Note_column::has_interface (i.grob_))
405 /* Don't refill killed spanner */
406 && line_spanner_->live())
408 Side_position_interface::add_support (line_spanner_,i.grob_);
409 add_bound_item (line_spanner_,dynamic_cast<Item*> (i.grob_));
412 if (script_ && !script_->get_parent (X_AXIS))
414 script_->set_parent (i.grob_, X_AXIS);
418 else if (Script_interface::has_interface (i.grob_) && script_)
420 SCM p = i.grob_->get_grob_property ("script-priority");
425 DynamicText doesn't really have a script-priority field.
428 && gh_scm2int (p) < gh_scm2int (script_->get_grob_property ("script-priority")))
430 Side_position_interface::add_support (line_spanner_, i.grob_);
435 ENTER_DESCRIPTION(Dynamic_engraver,
437 This engraver creates hairpins, dynamic texts, and their vertical
438 alignments. The symbols are collected onto a DynamicLineSpanner grob
439 which takes care of vertical positioning.
442 /* creats*/ "DynamicLineSpanner DynamicText Hairpin TextSpanner",
443 /* accepts */ "absolute-dynamic-event crescendo-event decrescendo-event",
444 /* acks */ "note-column-interface script-interface",