2 engravergroup.cc -- implement Engraver_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "flower-proto.hh"
10 #include "engraver-group-engraver.hh"
11 #include "engraver.hh"
13 #include "paper-score.hh"
17 Engraver_group_engraver::announce_grob (Grob_info info)
19 announce_info_arr_.push (info);
20 Engraver::announce_grob (info);
25 Engraver_group_engraver::create_grobs_in_simple_children ()
27 for (SCM p = simple_trans_list_; gh_pair_p (p); p = ly_cdr (p))
29 Translator * t = unsmob_translator (ly_car (p));
30 Engraver * eng = dynamic_cast<Engraver*> (t);
37 TODO: use this mechanism for the current Engraver_group_engraver as well.
40 SCM find_acknowledge_engravers (SCM gravlist, SCM meta);
42 Engraver_group_engraver::acknowledge_grobs ()
44 if (!announce_info_arr_.size ())
47 SCM tab = get_property ("acknowledgeHashTable");
48 SCM name_sym = ly_symbol2scm ("name");
49 SCM meta_sym = ly_symbol2scm ("meta");
52 for (int j =0; j < announce_info_arr_.size (); j++)
54 Grob_info info = announce_info_arr_[j];
56 SCM meta = info.grob_l_->internal_get_grob_property (meta_sym);
57 SCM nm = scm_assoc (name_sym, meta);
63 it's tempting to put an assert for
64 immutable_property_alist_ == '(), but in fact, some
65 engravers (clef-engraver) add some more information to the
66 immutable_property_alist_ (after it has been '()-ed).
68 We ignore the grob anyway. He who has no name, shall not
74 SCM acklist = scm_hashq_ref (tab, nm, SCM_UNDEFINED);
75 if (acklist == SCM_BOOL_F)
77 acklist= find_acknowledge_engravers (gh_cons (self_scm (), simple_trans_list_), meta);
78 scm_hashq_set_x (tab, nm, acklist);
81 for (SCM p = acklist; gh_pair_p (p); p = ly_cdr (p))
83 Translator * t = unsmob_translator (ly_car (p));
84 Engraver * eng = dynamic_cast<Engraver*> (t);
85 if (eng && eng!= info.origin_trans_l_)
86 eng->acknowledge_grob (info);
92 Engraver_group_engraver::do_announces ()
94 for (SCM p = trans_group_list_; gh_pair_p (p); p =ly_cdr (p))
96 Translator * t = unsmob_translator (ly_car (p));
97 dynamic_cast<Engraver_group_engraver*> (t)->do_announces ();
100 create_grobs_in_simple_children ();
102 while (announce_info_arr_.size ())
104 acknowledge_grobs ();
105 announce_info_arr_.clear ();
106 create_grobs_in_simple_children ();
110 #include <iostream.h>
113 order is : top to bottom (as opposed to do_announces)
116 Engraver_group_engraver::process_music ()
118 for (SCM p = simple_trans_list_; gh_pair_p (p); p =ly_cdr (p))
120 Translator * t = unsmob_translator (ly_car (p));
121 Engraver * eng = dynamic_cast<Engraver*> (t);
124 eng->process_music ();
126 for (SCM p = trans_group_list_; gh_pair_p (p); p =ly_cdr (p))
128 Translator * t = unsmob_translator (ly_car (p));
129 Engraver*eng = dynamic_cast<Engraver*> (t);
131 eng->process_music ();
136 Engraver_group_engraver::initialize ()
138 SCM tab = scm_make_vector (gh_int2scm (61), SCM_BOOL_F); // magic ->
139 set_property ("acknowledgeHashTable", tab);
141 Translator_group::initialize ();
144 Engraver_group_engraver::Engraver_group_engraver() {}
146 ENTER_DESCRIPTION(Engraver_group_engraver,
147 /* descr */ "A group of engravers taken together",
158 bool engraver_valid (Translator*tr, SCM ifaces)
160 SCM ack_ifs = scm_assoc (ly_symbol2scm ("interfaces-acked"), tr->translator_description());
161 ack_ifs = gh_cdr (ack_ifs);
162 for (SCM s = ifaces; ly_pair_p (s); s = ly_cdr (s))
163 if (scm_memq (ly_car (s), ack_ifs) != SCM_BOOL_F)
170 find_acknowledge_engravers (SCM gravlist, SCM meta_alist)
172 SCM ifaces = gh_cdr (scm_assoc (ly_symbol2scm ("interfaces"), meta_alist));
175 for (SCM s = gravlist; ly_pair_p (s); s = ly_cdr (s))
177 Translator* tr = unsmob_translator (ly_car (s));
178 if (engraver_valid (tr, ifaces))
179 l = scm_cons (tr->self_scm (), l);
181 l = scm_reverse_x (l, SCM_EOL);