2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
5 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
22 #include "context-def.hh"
23 #include "dispatcher.hh"
25 LY_DEFINE (ly_context_id, "ly:context-id",
26 1, 0, 0, (SCM context),
27 "Return the ID string of @var{context},"
28 " i.e., for @code{\\context Voice = one @dots{}}"
29 " return the string @code{one}.")
31 Context *tr = unsmob_context (context);
33 LY_ASSERT_SMOB (Context, context, 1);
35 return ly_string2scm (tr->id_string ());
38 LY_DEFINE (ly_context_name, "ly:context-name",
39 1, 0, 0, (SCM context),
40 "Return the name of @var{context},"
41 " i.e., for @code{\\context Voice = one @dots{}}"
42 " return the symbol @code{Voice}.")
44 LY_ASSERT_SMOB (Context, context, 1);
46 Context *tr = unsmob_context (context);
48 return ly_symbol2scm (tr->context_name ().c_str ());
51 LY_DEFINE (ly_context_grob_definition, "ly:context-grob-definition",
52 2, 0, 0, (SCM context, SCM name),
53 "Return the definition of @var{name} (a symbol) within"
54 " @var{context} as an alist.")
56 Context *tr = unsmob_context (context);
58 LY_ASSERT_SMOB (Context, context, 1);
59 LY_ASSERT_TYPE (ly_is_symbol, name, 2);
61 return updated_grob_properties (tr, name);
64 LY_DEFINE (ly_context_pushpop_property, "ly:context-pushpop-property",
65 3, 1, 0, (SCM context, SCM grob, SCM eltprop, SCM val),
66 "Do a single @code{\\override} or @code{\\revert} operation"
67 " in @var{context}. The grob definition @var{grob} is extended"
68 " with @var{eltprop} (if @var{val} is specified) or reverted"
71 Context *tg = unsmob_context (context);
73 LY_ASSERT_SMOB (Context, context, 1);
74 LY_ASSERT_TYPE (ly_is_symbol, grob, 2);
75 LY_ASSERT_TYPE (ly_is_symbol, eltprop, 3);
77 execute_pushpop_property (tg, grob, eltprop, val);
79 return SCM_UNSPECIFIED;
82 LY_DEFINE (ly_context_property, "ly:context-property",
83 2, 0, 0, (SCM context, SCM sym),
84 "Return the value for property @var{sym} in @var{context}.")
86 LY_ASSERT_SMOB (Context, context, 1);
87 LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
89 Context *t = unsmob_context (context);
90 return t->internal_get_property (sym);
93 LY_DEFINE (ly_context_set_property_x, "ly:context-set-property!",
94 3, 0, 0, (SCM context, SCM name, SCM val),
95 "Set value of property @var{name} in context @var{context}"
98 LY_ASSERT_SMOB (Context, context, 1);
99 LY_ASSERT_TYPE (ly_is_symbol, name, 2);
101 Context *tr = unsmob_context (context);
103 tr->set_property (name, val);
105 return SCM_UNSPECIFIED;
108 LY_DEFINE (ly_context_property_where_defined, "ly:context-property-where-defined",
109 2, 0, 0, (SCM context, SCM name),
110 "Return the context above @var{context}"
111 " where @var{name} is defined.")
113 LY_ASSERT_SMOB (Context, context, 1);
114 LY_ASSERT_TYPE (ly_is_symbol, name, 2);
116 Context *tr = unsmob_context (context);
119 tr = tr->where_defined (name, &val);
121 return tr->self_scm ();
126 LY_DEFINE (ly_context_unset_property, "ly:context-unset-property", 2, 0, 0,
127 (SCM context, SCM name),
128 "Unset value of property @var{name} in context @var{context}.")
130 LY_ASSERT_SMOB (Context, context, 1);
131 LY_ASSERT_TYPE (ly_is_symbol, name, 2);
132 Context *tr = unsmob_context (context);
134 tr->unset_property (name);
135 return SCM_UNSPECIFIED;
138 LY_DEFINE (ly_context_parent, "ly:context-parent",
139 1, 0, 0, (SCM context),
140 "Return the parent of @var{context}, @code{#f} if none.")
142 LY_ASSERT_SMOB (Context, context, 1);
143 Context *tr = unsmob_context (context);
145 tr = tr->get_parent_context ();
147 return tr->self_scm ();
152 /* FIXME: todo: should support translator IDs, and creation? */
153 LY_DEFINE (ly_context_find, "ly:context-find",
154 2, 0, 0, (SCM context, SCM name),
155 "Find a parent of @var{context} that has name or alias @var{name}."
156 " Return @code{#f} if not found.")
158 LY_ASSERT_SMOB (Context, context, 1);
159 LY_ASSERT_TYPE (ly_is_symbol, name, 2);
160 Context *tr = unsmob_context (context);
164 if (tr->is_alias (name))
165 return tr->self_scm ();
166 tr = tr->get_parent_context ();
172 LY_DEFINE (ly_context_now, "ly:context-now",
173 1, 0, 0, (SCM context),
174 "Return @code{now-moment} of context @var{context}.")
176 LY_ASSERT_SMOB (Context, context, 1);
177 Context *ctx = unsmob_context (context);
178 return ctx->now_mom ().smobbed_copy ();
181 LY_DEFINE (ly_context_event_source, "ly:context-event-source",
182 1, 0, 0, (SCM context),
183 "Return @code{event-source} of context @var{context}.")
185 LY_ASSERT_SMOB (Context, context, 1);
186 Context *ctx = unsmob_context (context);
187 return ctx->event_source ()->self_scm ();
190 LY_DEFINE (ly_context_events_below, "ly:context-events-below",
191 1, 0, 0, (SCM context),
192 "Return a @code{stream-distributor} that distributes all events"
193 " from @var{context} and all its subcontexts.")
195 LY_ASSERT_SMOB (Context, context, 1);
196 Context *ctx = unsmob_context (context);
197 return ctx->events_below ()->self_scm ();