/*
- context-scheme.cc -- Context bindings
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
-
- (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
+ Copyright (C) 1998--2014 Jan Nieuwenhuizen <janneke@gnu.org>
Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "context.hh"
#include "context-def.hh"
#include "dispatcher.hh"
+LY_DEFINE (ly_context_current_moment,
+ "ly:context-current-moment",
+ 1, 0, 0, (SCM context),
+ "Return the current moment of @var{context}.")
+{
+ Context *tr = unsmob_context (context);
+
+ LY_ASSERT_SMOB (Context, context, 1);
+
+ return tr->now_mom ().smobbed_copy ();
+}
+
LY_DEFINE (ly_context_id, "ly:context-id",
- 1, 0, 0, (SCM context),
- "Return the ID string of @var{context},"
- " i.e., for @code{\\context Voice = one @dots{}}"
- " return the string @code{one}.")
+ 1, 0, 0, (SCM context),
+ "Return the ID string of @var{context},"
+ " i.e., for @code{\\context Voice = \"one\" @dots{}}"
+ " return the string @code{one}.")
{
Context *tr = unsmob_context (context);
}
LY_DEFINE (ly_context_name, "ly:context-name",
- 1, 0, 0, (SCM context),
- "Return the name of @var{context},"
- " i.e., for @code{\\context Voice = one @dots{}}"
- " return the symbol @code{Voice}.")
+ 1, 0, 0, (SCM context),
+ "Return the name of @var{context},"
+ " i.e., for @code{\\context Voice = \"one\" @dots{}}"
+ " return the symbol @code{Voice}.")
{
LY_ASSERT_SMOB (Context, context, 1);
}
LY_DEFINE (ly_context_grob_definition, "ly:context-grob-definition",
- 2, 0, 0, (SCM context, SCM name),
- "Return the definition of @var{name} (a symbol) within"
- " @var{context} as an alist.")
+ 2, 0, 0, (SCM context, SCM name),
+ "Return the definition of @var{name} (a symbol) within"
+ " @var{context} as an alist.")
{
Context *tr = unsmob_context (context);
-
+
LY_ASSERT_SMOB (Context, context, 1);
LY_ASSERT_TYPE (ly_is_symbol, name, 2);
}
LY_DEFINE (ly_context_pushpop_property, "ly:context-pushpop-property",
- 3, 1, 0, (SCM context, SCM grob, SCM eltprop, SCM val),
- "Do a single @code{\\override} or @code{\\revert} operation"
- " in @var{context}. The grob definition @var{grob} is extended"
- " with @var{eltprop} (if @var{val} is specified) or reverted"
- " (if unspecified).")
+ 3, 1, 0, (SCM context, SCM grob, SCM eltprop, SCM val),
+ "Do a single @code{\\override} or @code{\\revert} operation"
+ " in @var{context}. The grob definition @var{grob} is extended"
+ " with @var{eltprop} (if @var{val} is specified) or reverted"
+ " (if unspecified).")
{
Context *tg = unsmob_context (context);
}
LY_DEFINE (ly_context_property, "ly:context-property",
- 2, 0, 0, (SCM context, SCM sym),
- "Return the value for property @var{sym} in @var{context}.")
+ 2, 1, 0, (SCM context, SCM sym, SCM def),
+ "Return the value for property @var{sym} in @var{context}."
+ " If @var{def} is given, and property value is @code{'()},"
+ " return @var{def}.")
{
LY_ASSERT_SMOB (Context, context, 1);
LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
Context *t = unsmob_context (context);
- return t->internal_get_property (sym);
+ SCM result = t->internal_get_property (sym);
+ return def != SCM_UNDEFINED && scm_is_null (result) ? def : result;
}
LY_DEFINE (ly_context_set_property_x, "ly:context-set-property!",
- 3, 0, 0, (SCM context, SCM name, SCM val),
- "Set value of property @var{name} in context @var{context}"
- " to @var{val}.")
+ 3, 0, 0, (SCM context, SCM name, SCM val),
+ "Set value of property @var{name} in context @var{context}"
+ " to @var{val}.")
{
LY_ASSERT_SMOB (Context, context, 1);
LY_ASSERT_TYPE (ly_is_symbol, name, 2);
}
LY_DEFINE (ly_context_property_where_defined, "ly:context-property-where-defined",
- 2, 0, 0, (SCM context, SCM name),
- "Return the context above @var{context}"
- " where @var{name} is defined.")
+ 2, 0, 0, (SCM context, SCM name),
+ "Return the context above @var{context}"
+ " where @var{name} is defined.")
{
LY_ASSERT_SMOB (Context, context, 1);
LY_ASSERT_TYPE (ly_is_symbol, name, 2);
-
+
Context *tr = unsmob_context (context);
SCM val;
}
LY_DEFINE (ly_context_unset_property, "ly:context-unset-property", 2, 0, 0,
- (SCM context, SCM name),
- "Unset value of property @var{name} in context @var{context}.")
+ (SCM context, SCM name),
+ "Unset value of property @var{name} in context @var{context}.")
{
LY_ASSERT_SMOB (Context, context, 1);
LY_ASSERT_TYPE (ly_is_symbol, name, 2);
Context *tr = unsmob_context (context);
-
+
tr->unset_property (name);
return SCM_UNSPECIFIED;
}
LY_DEFINE (ly_context_parent, "ly:context-parent",
- 1, 0, 0, (SCM context),
- "Return the parent of @var{context}, @code{#f} if none.")
+ 1, 0, 0, (SCM context),
+ "Return the parent of @var{context}, @code{#f} if none.")
{
LY_ASSERT_SMOB (Context, context, 1);
Context *tr = unsmob_context (context);
/* FIXME: todo: should support translator IDs, and creation? */
LY_DEFINE (ly_context_find, "ly:context-find",
- 2, 0, 0, (SCM context, SCM name),
- "Find a parent of @var{context} that has name or alias @var{name}."
- " Return @code{#f} if not found.")
+ 2, 0, 0, (SCM context, SCM name),
+ "Find a parent of @var{context} that has name or alias @var{name}."
+ " Return @code{#f} if not found.")
{
LY_ASSERT_SMOB (Context, context, 1);
LY_ASSERT_TYPE (ly_is_symbol, name, 2);
while (tr)
{
if (tr->is_alias (name))
- return tr->self_scm ();
+ return tr->self_scm ();
tr = tr->get_parent_context ();
}
}
LY_DEFINE (ly_context_now, "ly:context-now",
- 1, 0, 0, (SCM context),
- "Return @code{now-moment} of context @var{context}.")
+ 1, 0, 0, (SCM context),
+ "Return @code{now-moment} of context @var{context}.")
{
LY_ASSERT_SMOB (Context, context, 1);
Context *ctx = unsmob_context (context);
projects / lilypond.git / blobdiff