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"))
55 copy_property (Grob * g , SCM sym, SCM alist)
57 if (g->internal_get_grob_property (sym) == SCM_EOL)
59 SCM entry = scm_assoc (sym,alist);
60 if (gh_pair_p (entry))
62 g->internal_set_grob_property (sym, gh_cdr (entry));
69 We add the properties, one by one for each Script. We could save a
70 little space by tacking the props onto the Script grob (i.e. make
71 ScriptStaccato , ScriptMarcato, etc. )
73 Grob *make_script_from_event (SCM * descr, Translator_group*tg, Music * event,
76 SCM alist = tg->get_property ("scriptDefinitions");
77 SCM art_type= event->get_mus_property ("articulation-type");
78 SCM art = scm_assoc (art_type, alist);
80 if (art == SCM_BOOL_F)
82 event->origin ()->warning (_("Don't know how to interpret articulation:"));
83 event->origin ()->warning (_("Scheme encoding: "));
84 scm_write (art_type, scm_current_error_port ());
90 Grob *p =new Item (tg->get_property ("Script"));
93 SCM force_dir = event->get_mus_property ("direction");
94 if (is_direction (force_dir) && to_dir (force_dir))
95 p->set_grob_property ("direction", force_dir);
97 copy_property (p, ly_symbol2scm ("script-molecule"), art);
98 copy_property (p, ly_symbol2scm ("direction"), art);
99 copy_property (p, ly_symbol2scm ("side-relative-direction"), art);
102 SCM sprio = scm_assoc (ly_symbol2scm ("script-priority"), art);
103 if (gh_pair_p (sprio))
104 prio = gh_scm2int (gh_cdr (sprio));
108 Make sure they're in order of user input by adding index i.
109 Don't use the direction in this priority. Smaller means closer
114 Side_position_interface::set_axis (p, Y_AXIS);
115 p->set_grob_property ("script-priority", gh_int2scm (prio));
120 Script_engraver::process_music ()
122 for (int i=0; i < scripts_.size (); i++)
124 Music* l=scripts_[i].event_;
126 Grob * p = make_script_from_event (&scripts_[i].description_, daddy_trans_, l, i);
128 scripts_[i].script_ = p;
130 announce_grob (p, l->self_scm());
135 Script_engraver::acknowledge_grob (Grob_info inf)
137 if (Stem::has_interface (inf.grob_))
139 for (int i=0; i < scripts_.size (); i++)
141 Grob*e = scripts_[i].script_;
143 if (to_dir (e->get_grob_property ("side-relative-direction")))
144 e->set_grob_property ("direction-source", inf.grob_->self_scm ());
149 e->add_dependency (inf.grob_);
150 Side_position_interface::add_support (e, inf.grob_);
153 else if (Rhythmic_head::has_interface (inf.grob_))
155 for (int i=0; i < scripts_.size (); i++)
157 Grob *e = scripts_[i].script_;
159 if (Side_position_interface::get_axis (e) == X_AXIS
160 && !e->get_parent (Y_AXIS))
162 e->set_parent (inf.grob_, Y_AXIS);
163 e->add_dependency (inf.grob_); // ??
165 Side_position_interface::add_support (e,inf.grob_);
168 else if (Note_column::has_interface (inf.grob_))
172 We make note column the parent of the script. That's not
173 correct, but due to seconds in a chord, noteheads may be
174 swapped around horizontally. We don't know which note head to
175 put it on, so we postpone this decision to
176 Script_interface::before_line_breaking ().
179 for (int i=0; i < scripts_.size (); i++)
181 Grob *e = scripts_[i].script_;
183 if (!e->get_parent (X_AXIS) &&
184 Side_position_interface::get_axis (e) == Y_AXIS)
186 e->set_parent (inf.grob_, X_AXIS);
193 Script_engraver::stop_translation_timestep ()
195 for (int i=0; i < scripts_.size (); i++)
197 if (!scripts_[i].script_)
200 Grob * sc = scripts_[i].script_;
202 SCM follow = scm_assoc (ly_symbol2scm ("follow-into-staff"), scripts_[i].description_);
203 if (gh_pair_p (follow) && to_boolean (gh_cdr (follow)))
204 sc->add_offset_callback (Side_position_interface::quantised_position_proc, Y_AXIS);
206 Side_position_interface::add_staff_support (sc);
214 Script_engraver::Script_engraver(){}
216 ENTER_DESCRIPTION(Script_engraver,
217 /* descr */ "Handles note scripted articulations.",
218 /* creats*/ "Script",
219 /* accepts */ "script-event articulation-event",
220 /* acks */ "stem-interface rhythmic-head-interface note-column-interface",
221 /* reads */ "scriptDefinitions",