2 script-engraver.cc -- engrave Scripts: Articulations.
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "directional-element-interface.hh"
11 #include "engraver.hh"
13 #include "new-slur.hh"
14 #include "note-column.hh"
15 #include "paper-column.hh"
16 #include "rhythmic-head.hh"
17 #include "script-interface.hh"
18 #include "side-position-interface.hh"
19 #include "staff-symbol-referencer.hh"
32 description_ = SCM_EOL;
36 class Script_engraver : public Engraver
38 Array<Script_tuple> scripts_;
42 virtual bool try_music (Music*);
43 virtual void stop_translation_timestep ();
44 virtual void process_music ();
45 virtual void acknowledge_grob (Grob_info);
48 TRANSLATOR_DECLARATIONS (Script_engraver);
51 Script_engraver::Script_engraver ()
57 Script_engraver::try_music (Music *m)
59 if (m->is_mus_type ("articulation-event"))
61 /* Discard double articulations for part-combining. */
62 int script_count = scripts_.size ();
63 for (int i = 0; i < script_count; i++)
64 if (ly_c_equal_p (scripts_[i].event_
65 ->get_property ("articulation-type"),
66 m->get_property ("articulation-type")))
78 copy_property (Grob *g, SCM sym, SCM alist)
80 if (g->internal_get_property (sym) == SCM_EOL)
82 SCM entry = scm_assoc (sym, alist);
83 if (ly_c_pair_p (entry))
84 g->internal_set_property (sym, ly_cdr (entry));
88 /* Add the properties, one by one for each Script. A little space
89 (memory? --jcn) could be saved by tacking the props onto the Script
90 grob (i.e. make ScriptStaccato , ScriptMarcato, etc. ). */
91 void make_script_from_event (Grob *p, SCM *descr, Context *tg,
92 SCM art_type, int index)
94 SCM alist = tg->get_property ("scriptDefinitions");
95 SCM art = scm_assoc (art_type, alist);
97 if (art == SCM_BOOL_F)
100 warning (_ ("Do not know how to interpret articulation: "));
101 warning (_ ("Scheme encoding: "));
102 scm_write (art_type, scm_current_error_port ());
109 copy_property (p, ly_symbol2scm ("script-stencil"), art);
110 copy_property (p, ly_symbol2scm ("direction"), art);
111 copy_property (p, ly_symbol2scm ("side-relative-direction"), art);
114 SCM sprio = scm_assoc (ly_symbol2scm ("script-priority"), art);
115 if (ly_c_pair_p (sprio))
116 prio = ly_scm2int (ly_cdr (sprio));
118 /* Make sure they're in order of user input by adding index i.
119 Don't use the direction in this priority. Smaller means closer
123 Side_position_interface::set_axis (p, Y_AXIS);
124 p->set_property ("script-priority", scm_int2num (prio));
128 Script_engraver::process_music ()
130 int script_count = scripts_.size ();
131 for (int i = 0; i < script_count; i++)
133 Music *m = scripts_[i].event_;
135 Grob *p = make_item ("Script", m->self_scm ());
137 make_script_from_event (p, &scripts_[i].description_, context (),
138 m->get_property ("articulation-type"),
141 scripts_[i].script_ = p;
143 SCM force_dir = m->get_property ("direction");
144 if (is_direction (force_dir) && to_dir (force_dir))
145 p->set_property ("direction", force_dir);
150 Script_engraver::acknowledge_grob (Grob_info info)
152 int script_count = scripts_.size ();
153 if (Stem::has_interface (info.grob_))
155 for (int i = 0; i < script_count; i++)
157 Grob *e = scripts_[i].script_;
159 if (to_dir (e->get_property ("side-relative-direction")))
160 e->set_property ("direction-source", info.grob_->self_scm ());
162 /* FIXME: add dependency */
163 e->add_dependency (info.grob_);
164 Side_position_interface::add_support (e, info.grob_);
167 else if (Rhythmic_head::has_interface (info.grob_))
169 for (int i = 0; i < script_count; i++)
171 Grob *e = scripts_[i].script_;
173 if (Side_position_interface::get_axis (e) == X_AXIS
174 && !e->get_parent (Y_AXIS))
176 e->set_parent (info.grob_, Y_AXIS);
177 e->add_dependency (info.grob_);
179 Side_position_interface::add_support (e,info.grob_);
182 else if (Note_column::has_interface (info.grob_))
184 /* Make note column the parent of the script. That is not
185 correct, but due to seconds in a chord, noteheads may be
186 swapped around horizontally.
188 As the note head to put it on is not known now, postpone this
189 decision to Script_interface::before_line_breaking (). */
190 for (int i = 0; i < script_count; i++)
192 Grob *e = scripts_[i].script_;
194 if (!e->get_parent (X_AXIS)
195 && Side_position_interface::get_axis (e) == Y_AXIS)
196 e->set_parent (info.grob_, X_AXIS);
199 else if (New_slur::has_interface (info.grob_))
200 slur_ = dynamic_cast<Spanner*> (info.grob_);
204 Script_engraver::stop_translation_timestep ()
206 int script_count = scripts_.size ();
207 for (int i = 0; i < script_count; i++)
208 if (Grob *sc = scripts_[i].script_)
210 SCM follow = scm_assoc (ly_symbol2scm ("follow-into-staff"),
211 scripts_[i].description_);
212 if (ly_c_pair_p (follow) && to_boolean (ly_cdr (follow)))
214 sc->add_offset_callback (Side_position_interface
215 ::quantised_position_proc, Y_AXIS);
216 sc->set_property ("staff-padding", SCM_EOL);
219 /* Simplistic slur collision handling. This fixes simple collisions
224 but it most probably breaks for more interesting cases.
225 Maybe make a new colission engraver.
228 Assume that a SCRIPT that should collide with SLUR does not
229 have a negative priority. */
230 SCM priority = sc->get_property ("script-priority");
234 int rank = Paper_column::get_rank (sc);
239 // this always yields -1
240 if (Item *i = dynamic_cast<Item*> (sc))
241 if (i->get_column ())
242 rank = i->get_column ()->rank_;
244 // this always yields -1
245 for (Grob *p = sc; p && rank < 0; p = p->get_parent (Y_AXIS))
247 if (Item *i = dynamic_cast<Item*> (p))
248 if (i->get_column ())
249 rank = i->get_column ()->rank_;
253 if (robust_scm2int (priority, 0) >= 0
255 && get_grob_direction (sc) == get_slur_dir (slur_)
256 && (slur_->spanned_rank_iv ().contains (rank)
257 /* I'm a bit out of ideas about and time to search for
258 how to get our rank. Sue me. */
261 Real ss = Staff_symbol_referencer::staff_space (sc);
262 Real pad = robust_scm2double (sc->get_property ("padding"), 0);
264 /* FIXME: 1ss padding hardcoded */
265 sc->set_property ("padding", scm_make_real (pad + ss));
271 ENTER_DESCRIPTION (Script_engraver,
272 /* descr */ "Handles note scripted articulations.",
273 /* creats*/ "Script",
274 /* accepts */ "script-event articulation-event",
275 /* acks */ "stem-interface rhythmic-head-interface\
276 new-slur-interface note-column-interface",
277 /* reads */ "scriptDefinitions",