2 script-engraver.cc -- implement Script_engraver
4 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "side-position-interface.hh"
11 #include "rhythmic-head.hh"
12 #include "engraver.hh"
13 #include "note-column.hh"
14 #include "translator-group.hh"
25 description_ = SCM_EOL;
29 class Script_engraver : public Engraver
31 Array<Script_tuple> scripts_;
33 TRANSLATOR_DECLARATIONS(Script_engraver);
35 virtual bool try_music (Music*);
36 virtual void stop_translation_timestep ();
37 virtual void process_music ();
38 virtual void acknowledge_grob (Grob_info);
42 Script_engraver::try_music (Music *r)
44 if (r->is_mus_type ("articulation-event"))
47 Discard double articulations.
48 This is necessary for part-combining.
50 for (int j = 0; j < scripts_.size (); j++)
51 if (gh_equal_p (scripts_[j]. event_->get_mus_property ("articulation-type"),
52 r->get_mus_property ("articulation-type")
66 copy_property (Grob * g , SCM sym, SCM alist)
68 if (g->internal_get_grob_property (sym) == SCM_EOL)
70 SCM entry = scm_assoc (sym,alist);
71 if (gh_pair_p (entry))
73 g->internal_set_grob_property (sym, gh_cdr (entry));
80 We add the properties, one by one for each Script. We could save a
81 little space by tacking the props onto the Script grob (i.e. make
82 ScriptStaccato , ScriptMarcato, etc. )
84 void make_script_from_event (Grob *p,
85 SCM * descr, Translator_group*tg, Music * event,
88 SCM alist = tg->get_property ("scriptDefinitions");
89 SCM art_type= event->get_mus_property ("articulation-type");
90 SCM art = scm_assoc (art_type, alist);
92 if (art == SCM_BOOL_F)
94 event->origin ()->warning (_("Don't know how to interpret articulation:"));
95 event->origin ()->warning (_("Scheme encoding: "));
96 scm_write (art_type, scm_current_error_port ());
105 SCM force_dir = event->get_mus_property ("direction");
106 if (is_direction (force_dir) && to_dir (force_dir))
107 p->set_grob_property ("direction", force_dir);
109 copy_property (p, ly_symbol2scm ("script-molecule"), 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 (gh_pair_p (sprio))
116 prio = gh_scm2int (gh_cdr (sprio));
120 Make sure they're in order of user input by adding index i.
121 Don't use the direction in this priority. Smaller means closer
126 Side_position_interface::set_axis (p, Y_AXIS);
127 p->set_grob_property ("script-priority", gh_int2scm (prio));
131 Script_engraver::process_music ()
133 for (int i=0; i < scripts_.size (); i++)
135 Music* l=scripts_[i].event_;
137 Grob * p = make_item ("Script");
139 make_script_from_event (p, &scripts_[i].description_, daddy_trans_, l, i);
141 scripts_[i].script_ = p;
143 announce_grob (p, l->self_scm());
148 Script_engraver::acknowledge_grob (Grob_info inf)
150 if (Stem::has_interface (inf.grob_))
152 for (int i=0; i < scripts_.size (); i++)
154 Grob*e = scripts_[i].script_;
156 if (to_dir (e->get_grob_property ("side-relative-direction")))
157 e->set_grob_property ("direction-source", inf.grob_->self_scm ());
162 e->add_dependency (inf.grob_);
163 Side_position_interface::add_support (e, inf.grob_);
166 else if (Rhythmic_head::has_interface (inf.grob_))
168 for (int i=0; i < scripts_.size (); i++)
170 Grob *e = scripts_[i].script_;
172 if (Side_position_interface::get_axis (e) == X_AXIS
173 && !e->get_parent (Y_AXIS))
175 e->set_parent (inf.grob_, Y_AXIS);
176 e->add_dependency (inf.grob_); // ??
178 Side_position_interface::add_support (e,inf.grob_);
181 else if (Note_column::has_interface (inf.grob_))
185 We make note column the parent of the script. That's not
186 correct, but due to seconds in a chord, noteheads may be
187 swapped around horizontally. We don't know which note head to
188 put it on, so we postpone this decision to
189 Script_interface::before_line_breaking ().
192 for (int i=0; i < scripts_.size (); i++)
194 Grob *e = scripts_[i].script_;
196 if (!e->get_parent (X_AXIS) &&
197 Side_position_interface::get_axis (e) == Y_AXIS)
199 e->set_parent (inf.grob_, X_AXIS);
206 Script_engraver::stop_translation_timestep ()
208 for (int i=0; i < scripts_.size (); i++)
210 if (!scripts_[i].script_)
213 Grob * sc = scripts_[i].script_;
215 SCM follow = scm_assoc (ly_symbol2scm ("follow-into-staff"), scripts_[i].description_);
216 if (gh_pair_p (follow) && to_boolean (gh_cdr (follow)))
218 sc->add_offset_callback (Side_position_interface::quantised_position_proc, Y_AXIS);
219 sc->set_grob_property ("staff-padding", SCM_EOL);
228 Script_engraver::Script_engraver(){}
230 ENTER_DESCRIPTION(Script_engraver,
231 /* descr */ "Handles note scripted articulations.",
232 /* creats*/ "Script",
233 /* accepts */ "script-event articulation-event",
234 /* acks */ "stem-interface rhythmic-head-interface note-column-interface",
235 /* reads */ "scriptDefinitions",