2 property-iterator.cc -- implement Property_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "property-iterator.hh"
12 #include "context-def.hh"
13 #include "global-context.hh"
15 bool check_grob (Music *mus, SCM sym);
18 There is no real processing to a property: just lookup the
19 translation unit, and set the property.
22 Property_iterator::process (Moment m)
24 SCM sym = get_music ()->get_property ("symbol");
25 if (scm_is_symbol (sym))
27 SCM val = get_music ()->get_property ("value");
30 ok = type_check_assignment (sym, val, ly_symbol2scm ("translation-type?"));
32 get_outlet ()->internal_set_property (sym, val);
34 Simple_music_iterator::process (m);
38 Property_unset_iterator::process (Moment m)
40 SCM sym = get_music ()->get_property ("symbol");
41 type_check_assignment (sym, SCM_EOL, ly_symbol2scm ("translation-type?"));
42 get_outlet ()->unset_property (sym);
44 Simple_music_iterator::process (m);
47 MAKE_SCHEME_CALLBACK (Property_iterator, once_finalization, 2);
49 Property_iterator::once_finalization (SCM translator, SCM music)
51 Music *m = unsmob_music (music);
53 = dynamic_cast<Context *> (unsmob_context (translator));
54 SCM sym = m->get_property ("symbol");
56 tg->unset_property (sym);
57 return SCM_UNSPECIFIED;
61 Property_iterator::do_quit ()
63 if (to_boolean (get_music ()->get_property ("once")))
65 SCM trans = get_outlet ()->self_scm ();
66 SCM music = get_music ()->self_scm ();
68 Global_context *tg = get_outlet ()->get_global_context ();
69 tg->add_finalization (scm_list_n (once_finalization_proc,
70 trans, music, SCM_UNDEFINED));
75 check_grob (Music *mus, SCM sym)
77 bool g = to_boolean (scm_object_property (sym, ly_symbol2scm ("is-grob?")));
80 mus->origin ()->warning (_f ("not a grob name, `%s'",
81 ly_symbol2string (sym)));
87 Push_property_iterator::process (Moment m)
89 SCM sym = get_music ()->get_property ("symbol");
90 if (check_grob (get_music (), sym))
92 SCM eprop = get_music ()->get_property ("grob-property");
93 SCM val = get_music ()->get_property ("grob-value");
95 if (to_boolean (get_music ()->get_property ("pop-first"))
96 && !to_boolean (get_music ()->get_property ("once")))
97 execute_pushpop_property (get_outlet (), sym, eprop, SCM_UNDEFINED);
99 execute_pushpop_property (get_outlet (), sym, eprop, val);
101 Simple_music_iterator::process (m);
104 MAKE_SCHEME_CALLBACK (Push_property_iterator, once_finalization, 2);
106 Push_property_iterator::once_finalization (SCM trans, SCM music)
108 Music *mus = unsmob_music (music);
109 Context *tg = dynamic_cast<Context *> (unsmob_context (trans));
111 SCM sym = mus->get_property ("symbol");
112 if (check_grob (mus, sym))
114 SCM eprop = mus->get_property ("grob-property");
116 execute_pushpop_property (tg, sym, eprop, SCM_UNDEFINED);
118 return SCM_UNSPECIFIED;
122 Push_property_iterator::do_quit ()
124 if (to_boolean (get_music ()->get_property ("once")))
126 SCM trans = get_outlet ()->self_scm ();
127 SCM music = get_music ()->self_scm ();
129 Global_context *tg = get_outlet ()->get_global_context ();
130 tg->add_finalization (scm_list_n (once_finalization_proc,
131 trans, music, SCM_UNDEFINED));
136 Pop_property_iterator::process (Moment m)
138 SCM sym = get_music ()->get_property ("symbol");
140 if (check_grob (get_music (), sym))
142 SCM eprop = get_music ()->get_property ("grob-property");
143 execute_pushpop_property (get_outlet (), sym, eprop, SCM_UNDEFINED);
145 Simple_music_iterator::process (m);
148 IMPLEMENT_CTOR_CALLBACK (Pop_property_iterator);
149 IMPLEMENT_CTOR_CALLBACK (Push_property_iterator);
150 IMPLEMENT_CTOR_CALLBACK (Property_iterator);
151 IMPLEMENT_CTOR_CALLBACK (Property_unset_iterator);