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));
77 This is a rather crude check: we merely check if the translator
81 check_grob (Music *mus, SCM sym)
84 list_p = scm_c_eval_string ("list?");
86 SCM type = scm_object_property (sym, ly_symbol2scm ("translation-type?"));
87 bool ok = type == list_p;
90 mus->origin ()->warning (_f ("not a grob name, `%s'",
91 ly_symbol2string (sym)));
96 Push_property_iterator::process (Moment m)
98 SCM sym = get_music ()->get_property ("symbol");
99 if (check_grob (get_music (), sym))
101 SCM eprop = get_music ()->get_property ("grob-property");
102 SCM val = get_music ()->get_property ("grob-value");
104 if (to_boolean (get_music ()->get_property ("pop-first"))
105 && !to_boolean (get_music ()->get_property ("once")))
106 execute_pushpop_property (get_outlet (), sym, eprop, SCM_UNDEFINED);
108 execute_pushpop_property (get_outlet (), sym, eprop, val);
110 Simple_music_iterator::process (m);
113 MAKE_SCHEME_CALLBACK (Push_property_iterator, once_finalization, 2);
115 Push_property_iterator::once_finalization (SCM trans, SCM music)
117 Music *mus = unsmob_music (music);
118 Context *tg = dynamic_cast<Context *> (unsmob_context (trans));
120 SCM sym = mus->get_property ("symbol");
121 if (check_grob (mus, sym))
123 SCM eprop = mus->get_property ("grob-property");
125 execute_pushpop_property (tg, sym, eprop, SCM_UNDEFINED);
127 return SCM_UNSPECIFIED;
131 Push_property_iterator::do_quit ()
133 if (to_boolean (get_music ()->get_property ("once")))
135 SCM trans = get_outlet ()->self_scm ();
136 SCM music = get_music ()->self_scm ();
138 Global_context *tg = get_outlet ()->get_global_context ();
139 tg->add_finalization (scm_list_n (once_finalization_proc,
140 trans, music, SCM_UNDEFINED));
145 Pop_property_iterator::process (Moment m)
147 SCM sym = get_music ()->get_property ("symbol");
149 if (check_grob (get_music (), sym))
151 SCM eprop = get_music ()->get_property ("grob-property");
152 execute_pushpop_property (get_outlet (), sym, eprop, SCM_UNDEFINED);
154 Simple_music_iterator::process (m);
157 IMPLEMENT_CTOR_CALLBACK (Pop_property_iterator);
158 IMPLEMENT_CTOR_CALLBACK (Push_property_iterator);
159 IMPLEMENT_CTOR_CALLBACK (Property_iterator);
160 IMPLEMENT_CTOR_CALLBACK (Property_unset_iterator);