2 context-def.cc -- implement Context_def
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 /* TODO: should junk this class an replace by
10 a single list of context modifications? */
12 #include "context-def.hh"
15 #include "international.hh"
16 #include "output-def.hh"
17 #include "translator.hh"
20 Context_def::Context_def ()
22 context_aliases_ = SCM_EOL;
23 translator_group_type_ = SCM_EOL;
24 accept_mods_ = SCM_EOL;
25 translator_mods_ = SCM_EOL;
26 property_ops_ = SCM_EOL;
27 context_name_ = SCM_EOL;
28 default_child_ = SCM_EOL;
29 description_ = SCM_EOL;
30 input_location_ = SCM_EOL;
34 input_location_ = make_input (Input ());
35 context_name_ = ly_symbol2scm ("");
39 Context_def::origin () const
41 return unsmob_input (input_location_);
44 Context_def::Context_def (Context_def const &s)
46 context_aliases_ = SCM_EOL;
47 translator_group_type_ = SCM_EOL;
48 accept_mods_ = SCM_EOL;
49 translator_mods_ = SCM_EOL;
50 property_ops_ = SCM_EOL;
51 context_name_ = SCM_EOL;
52 description_ = SCM_EOL;
53 default_child_ = SCM_EOL;
54 input_location_ = SCM_EOL;
57 description_ = s.description_;
58 input_location_ = make_input (*s.origin ());
59 default_child_ = s.default_child_;
60 accept_mods_ = s.accept_mods_;
61 property_ops_ = s.property_ops_;
62 translator_mods_ = s.translator_mods_;
63 context_aliases_ = s.context_aliases_;
64 translator_group_type_ = s.translator_group_type_;
65 context_name_ = s.context_name_;
68 Context_def::~Context_def ()
72 #include "ly-smobs.icc"
73 IMPLEMENT_SMOBS (Context_def);
74 IMPLEMENT_DEFAULT_EQUAL_P (Context_def);
77 Context_def::print_smob (SCM smob, SCM port, scm_print_state*)
79 Context_def *me = (Context_def *) SCM_CELL_WORD_1 (smob);
81 scm_puts ("#<Context_def ", port);
82 scm_display (me->context_name_, port);
88 Context_def::mark_smob (SCM smob)
90 ASSERT_LIVE_IS_ALLOWED ();
92 Context_def *me = (Context_def *) SCM_CELL_WORD_1 (smob);
94 scm_gc_mark (me->description_);
95 scm_gc_mark (me->context_aliases_);
96 scm_gc_mark (me->accept_mods_);
97 scm_gc_mark (me->translator_mods_);
98 scm_gc_mark (me->property_ops_);
99 scm_gc_mark (me->translator_group_type_);
100 scm_gc_mark (me->default_child_);
101 scm_gc_mark (me->input_location_);
103 return me->context_name_;
107 Context_def::add_context_mod (SCM mod)
109 SCM tag = scm_car (mod);
110 if (ly_symbol2scm ("description") == tag)
112 description_ = scm_cadr (mod);
117 other modifiers take symbols as argument.
119 SCM sym = scm_cadr (mod);
120 if (scm_is_string (sym))
121 sym = scm_string_to_symbol (sym);
123 if (ly_symbol2scm ("default-child") == tag)
124 default_child_ = sym;
125 else if (ly_symbol2scm ("consists") == tag
126 || ly_symbol2scm ("remove") == tag)
128 if (!get_translator (sym))
129 warning (_f ("program has no such type: `%s'",
130 ly_symbol2string (sym).c_str ()));
132 translator_mods_ = scm_cons (scm_list_2 (tag, sym), translator_mods_);
134 else if (ly_symbol2scm ("accepts") == tag
135 || ly_symbol2scm ("denies") == tag)
136 accept_mods_ = scm_cons (scm_list_2 (tag, sym), accept_mods_);
137 else if (ly_symbol2scm ("pop") == tag
138 || ly_symbol2scm ("push") == tag
139 || ly_symbol2scm ("assign") == tag
140 || ly_symbol2scm ("unset") == tag)
141 property_ops_ = scm_cons (mod, property_ops_);
142 else if (ly_symbol2scm ("alias") == tag)
143 context_aliases_ = scm_cons (sym, context_aliases_);
144 else if (ly_symbol2scm ("translator-type") == tag)
145 translator_group_type_ = sym;
146 else if (ly_symbol2scm ("context-name") == tag)
149 programming_error ("unknown context mod tag");
153 Context_def::get_accepted (SCM user_mod) const
155 SCM mods = scm_reverse_x (scm_list_copy (accept_mods_), user_mod);
157 for (SCM s = mods; scm_is_pair (s); s = scm_cdr (s))
159 SCM tag = scm_caar (s);
160 SCM sym = scm_cadar (s);
161 if (tag == ly_symbol2scm ("accepts"))
162 acc = scm_cons (sym, acc);
163 else if (tag == ly_symbol2scm ("denies"))
164 acc = scm_delete_x (sym, acc);
167 SCM def = get_default_child (user_mod);
168 if (scm_is_symbol (def))
170 if (scm_memq (def, acc))
171 acc = scm_delete_x (def, acc);
172 acc = scm_cons (def, acc);
179 Context_def::get_default_child (SCM user_mod) const
181 SCM name = default_child_;
182 for (SCM s = user_mod; scm_is_pair (s); s = scm_cdr (s))
184 SCM entry = scm_car (s);
185 if (scm_car (entry) == ly_symbol2scm ("default-child"))
187 name = scm_cadr (entry);
196 Given a name of a context that we want to create, finds a list of context
197 definitions such that:
198 - the first element in the list defines a context that is a valid child of
199 the context defined by this Context_def
200 - each subsequent element in the list defines a context that is a valid child
201 of the the context defined by the preceding element in the list
202 - the last element in the list defines a context with the given name
204 The ADDITIONAL_ACCEPTS parameter is a list of additional contexts that this
205 specific context def (but not any of the child context defs) should accept.
207 vector<Context_def *>
208 Context_def::path_to_acceptable_context (SCM type_sym,
210 SCM additional_accepts) const
212 set<const Context_def *> seen;
213 return internal_path_to_acceptable_context (type_sym, odef, additional_accepts, &seen);
217 The SEEN parameter is a set which keeps track of visited contexts, allowing
218 contexts of the same type to be nested.
221 Context_def::internal_path_to_acceptable_context (SCM type_sym,
223 SCM additional_accepts,
224 set<const Context_def *> *seen) const
226 assert (scm_is_symbol (type_sym));
228 SCM accepted = get_accepted (additional_accepts);
230 vector<Context_def*> accepteds;
231 for (SCM s = accepted; scm_is_pair (s); s = scm_cdr (s))
232 if (Context_def *t = unsmob_context_def (find_context_def (odef,
234 accepteds.push_back (t);
236 vector<Context_def*> best_result;
237 for (vsize i = 0; i < accepteds.size (); i++)
239 /* do not check aliases, because \context Staff should not
240 create RhythmicStaff. */
241 if (ly_is_equal (accepteds[i]->get_context_name (), type_sym))
243 best_result.push_back (accepteds[i]);
249 vsize best_depth = INT_MAX;
250 for (vsize i = 0; i < accepteds.size (); i++)
252 Context_def *g = accepteds[i];
254 if (!seen->count (g))
256 vector<Context_def*> result
257 = g->internal_path_to_acceptable_context (type_sym, odef, SCM_EOL, seen);
258 if (result.size () && result.size () < best_depth)
260 best_depth = result.size ();
261 result.insert (result.begin (), g);
262 best_result = result;
272 Context_def::get_translator_names (SCM user_mod) const
276 SCM mods = scm_reverse_x (scm_list_copy (translator_mods_), user_mod);
278 for (SCM s = mods; scm_is_pair (s); s = scm_cdr (s))
280 SCM tag = scm_caar (s);
281 SCM arg = scm_cadar (s);
283 if (scm_is_string (arg))
284 arg = scm_string_to_symbol (arg);
286 if (ly_symbol2scm ("consists") == tag)
287 l1 = scm_cons (arg, l1);
288 else if (ly_symbol2scm ("remove") == tag
289 && get_translator (arg))
290 l1 = scm_delete_x (arg, l1);
297 Context_def::instantiate (SCM ops)
299 Context *context = new Context ();
301 context->definition_ = self_scm ();
302 context->definition_mods_ = ops;
303 context->aliases_ = context_aliases_;
304 context->accepts_list_ = get_accepted (ops);
310 Context_def::make_scm ()
312 Context_def *t = new Context_def;
313 return t->unprotect ();
317 Context_def::apply_default_property_operations (Context *tg)
319 apply_property_operations (tg, property_ops_);
323 Context_def::to_alist () const
327 ell = scm_cons (scm_cons (ly_symbol2scm ("consists"),
328 get_translator_names (SCM_EOL)), ell);
329 ell = scm_cons (scm_cons (ly_symbol2scm ("description"), description_), ell);
330 ell = scm_cons (scm_cons (ly_symbol2scm ("aliases"), context_aliases_), ell);
331 ell = scm_cons (scm_cons (ly_symbol2scm ("accepts"), get_accepted (SCM_EOL)),
333 ell = scm_cons (scm_cons (ly_symbol2scm ("property-ops"), property_ops_),
335 ell = scm_cons (scm_cons (ly_symbol2scm ("context-name"), context_name_),
338 if (scm_is_symbol (translator_group_type_))
339 ell = scm_cons (scm_cons (ly_symbol2scm ("group-type"),
340 translator_group_type_), ell);