2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 /* TODO: should junk this class an replace by
21 a single list of context modifications? */
23 #include "context-def.hh"
26 #include "international.hh"
27 #include "output-def.hh"
28 #include "translator.hh"
31 Context_def::Context_def ()
33 context_aliases_ = SCM_EOL;
34 translator_group_type_ = SCM_EOL;
35 accept_mods_ = SCM_EOL;
36 translator_mods_ = SCM_EOL;
37 property_ops_ = SCM_EOL;
38 context_name_ = SCM_EOL;
39 default_child_ = SCM_EOL;
40 description_ = SCM_EOL;
41 input_location_ = SCM_EOL;
45 input_location_ = make_input (Input ());
46 context_name_ = ly_symbol2scm ("");
50 Context_def::origin () const
52 return unsmob_input (input_location_);
55 Context_def::Context_def (Context_def const &s)
57 context_aliases_ = SCM_EOL;
58 translator_group_type_ = SCM_EOL;
59 accept_mods_ = SCM_EOL;
60 translator_mods_ = SCM_EOL;
61 property_ops_ = SCM_EOL;
62 context_name_ = SCM_EOL;
63 description_ = SCM_EOL;
64 default_child_ = SCM_EOL;
65 input_location_ = SCM_EOL;
68 description_ = s.description_;
69 input_location_ = make_input (*s.origin ());
70 default_child_ = s.default_child_;
71 accept_mods_ = s.accept_mods_;
72 property_ops_ = s.property_ops_;
73 translator_mods_ = s.translator_mods_;
74 context_aliases_ = s.context_aliases_;
75 translator_group_type_ = s.translator_group_type_;
76 context_name_ = s.context_name_;
79 Context_def::~Context_def ()
83 #include "ly-smobs.icc"
84 IMPLEMENT_SMOBS (Context_def);
85 IMPLEMENT_DEFAULT_EQUAL_P (Context_def);
88 Context_def::print_smob (SCM smob, SCM port, scm_print_state*)
90 Context_def *me = (Context_def *) SCM_CELL_WORD_1 (smob);
92 scm_puts ("#<Context_def ", port);
93 scm_display (me->context_name_, port);
99 Context_def::mark_smob (SCM smob)
101 ASSERT_LIVE_IS_ALLOWED ();
103 Context_def *me = (Context_def *) SCM_CELL_WORD_1 (smob);
105 scm_gc_mark (me->description_);
106 scm_gc_mark (me->context_aliases_);
107 scm_gc_mark (me->accept_mods_);
108 scm_gc_mark (me->translator_mods_);
109 scm_gc_mark (me->property_ops_);
110 scm_gc_mark (me->translator_group_type_);
111 scm_gc_mark (me->default_child_);
112 scm_gc_mark (me->input_location_);
114 return me->context_name_;
118 Context_def::add_context_mod (SCM mod)
120 SCM tag = scm_car (mod);
121 if (ly_symbol2scm ("description") == tag)
123 description_ = scm_cadr (mod);
128 other modifiers take symbols as argument.
130 SCM sym = scm_cadr (mod);
131 if (scm_is_string (sym))
132 sym = scm_string_to_symbol (sym);
134 if (ly_symbol2scm ("default-child") == tag)
135 default_child_ = sym;
136 else if (ly_symbol2scm ("consists") == tag
137 || ly_symbol2scm ("remove") == tag)
139 translator_mods_ = scm_cons (scm_list_2 (tag, sym), translator_mods_);
141 else if (ly_symbol2scm ("accepts") == tag
142 || ly_symbol2scm ("denies") == tag)
143 accept_mods_ = scm_cons (scm_list_2 (tag, sym), accept_mods_);
144 else if (ly_symbol2scm ("pop") == tag
145 || ly_symbol2scm ("push") == tag
146 || ly_symbol2scm ("assign") == tag
147 || ly_symbol2scm ("unset") == tag)
148 property_ops_ = scm_cons (mod, property_ops_);
149 else if (ly_symbol2scm ("alias") == tag)
150 context_aliases_ = scm_cons (sym, context_aliases_);
151 else if (ly_symbol2scm ("translator-type") == tag)
152 translator_group_type_ = sym;
153 else if (ly_symbol2scm ("context-name") == tag)
156 programming_error ("unknown context mod tag");
160 Context_def::get_accepted (SCM user_mod) const
162 SCM mods = scm_reverse_x (scm_list_copy (accept_mods_), user_mod);
164 for (SCM s = mods; scm_is_pair (s); s = scm_cdr (s))
166 SCM tag = scm_caar (s);
167 SCM sym = scm_cadar (s);
168 if (tag == ly_symbol2scm ("accepts"))
169 acc = scm_cons (sym, acc);
170 else if (tag == ly_symbol2scm ("denies"))
171 acc = scm_delete_x (sym, acc);
174 SCM def = get_default_child (user_mod);
175 if (scm_is_symbol (def))
177 if (scm_memq (def, acc))
178 acc = scm_delete_x (def, acc);
179 acc = scm_cons (def, acc);
186 Context_def::get_default_child (SCM user_mod) const
188 SCM name = default_child_;
189 for (SCM s = user_mod; scm_is_pair (s); s = scm_cdr (s))
191 SCM entry = scm_car (s);
192 if (scm_car (entry) == ly_symbol2scm ("default-child"))
194 name = scm_cadr (entry);
203 Given a name of a context that we want to create, finds a list of context
204 definitions such that:
205 - the first element in the list defines a context that is a valid child of
206 the context defined by this Context_def
207 - each subsequent element in the list defines a context that is a valid child
208 of the the context defined by the preceding element in the list
209 - the last element in the list defines a context with the given name
211 The ADDITIONAL_ACCEPTS parameter is a list of additional contexts that this
212 specific context def (but not any of the child context defs) should accept.
214 vector<Context_def *>
215 Context_def::path_to_acceptable_context (SCM type_sym,
217 SCM additional_accepts) const
219 set<const Context_def *> seen;
220 return internal_path_to_acceptable_context (type_sym, odef, additional_accepts, &seen);
224 The SEEN parameter is a set which keeps track of visited contexts, allowing
225 contexts of the same type to be nested.
228 Context_def::internal_path_to_acceptable_context (SCM type_sym,
230 SCM additional_accepts,
231 set<const Context_def *> *seen) const
233 assert (scm_is_symbol (type_sym));
235 SCM accepted = get_accepted (additional_accepts);
237 vector<Context_def*> accepteds;
238 for (SCM s = accepted; scm_is_pair (s); s = scm_cdr (s))
239 if (Context_def *t = unsmob_context_def (find_context_def (odef,
241 accepteds.push_back (t);
243 vector<Context_def*> best_result;
244 for (vsize i = 0; i < accepteds.size (); i++)
246 /* do not check aliases, because \context Staff should not
247 create RhythmicStaff. */
248 if (ly_is_equal (accepteds[i]->get_context_name (), type_sym))
250 best_result.push_back (accepteds[i]);
256 vsize best_depth = INT_MAX;
257 for (vsize i = 0; i < accepteds.size (); i++)
259 Context_def *g = accepteds[i];
261 if (!seen->count (g))
263 vector<Context_def*> result
264 = g->internal_path_to_acceptable_context (type_sym, odef, SCM_EOL, seen);
265 if (result.size () && result.size () < best_depth)
267 best_depth = result.size ();
268 result.insert (result.begin (), g);
269 best_result = result;
279 Context_def::get_translator_names (SCM user_mod) const
283 SCM mods = scm_reverse_x (scm_list_copy (translator_mods_), user_mod);
285 for (SCM s = mods; scm_is_pair (s); s = scm_cdr (s))
287 SCM tag = scm_caar (s);
288 SCM arg = scm_cadar (s);
290 if (scm_is_string (arg))
291 arg = scm_string_to_symbol (arg);
293 if (ly_symbol2scm ("consists") == tag)
294 l1 = scm_cons (arg, l1);
295 else if (ly_symbol2scm ("remove") == tag
296 && get_translator (arg))
297 l1 = scm_delete_x (arg, l1);
304 Context_def::instantiate (SCM ops)
306 Context *context = new Context ();
308 context->definition_ = self_scm ();
309 context->definition_mods_ = ops;
310 context->aliases_ = context_aliases_;
311 context->accepts_list_ = get_accepted (ops);
317 Context_def::make_scm ()
319 Context_def *t = new Context_def;
320 return t->unprotect ();
324 Context_def::apply_default_property_operations (Context *tg)
326 apply_property_operations (tg, property_ops_);
330 Context_def::to_alist () const
334 ell = scm_cons (scm_cons (ly_symbol2scm ("consists"),
335 get_translator_names (SCM_EOL)), ell);
336 ell = scm_cons (scm_cons (ly_symbol2scm ("description"), description_), ell);
337 ell = scm_cons (scm_cons (ly_symbol2scm ("aliases"), context_aliases_), ell);
338 ell = scm_cons (scm_cons (ly_symbol2scm ("accepts"), get_accepted (SCM_EOL)),
340 ell = scm_cons (scm_cons (ly_symbol2scm ("property-ops"), property_ops_),
342 ell = scm_cons (scm_cons (ly_symbol2scm ("context-name"), context_name_),
345 if (scm_is_symbol (translator_group_type_))
346 ell = scm_cons (scm_cons (ly_symbol2scm ("group-type"),
347 translator_group_type_), ell);