/*
- context-property.cc -- implement manipulation of immutable Grob
- property lists.
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2004--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2004--2007 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 "main.hh"
#include "simple-closure.hh"
#include "spanner.hh"
+#include "unpure-pure-container.hh"
#include "warn.hh"
/*
*/
void
general_pushpop_property (Context *context,
- SCM context_property,
- SCM grob_property_path,
- SCM new_value)
+ SCM context_property,
+ SCM grob_property_path,
+ SCM new_value)
{
if (!scm_is_symbol (context_property)
|| !scm_is_symbol (scm_car (grob_property_path)))
{
warning (_ ("need symbol arguments for \\override and \\revert"));
if (do_internal_type_checking_global)
- assert (false);
+ assert (false);
}
- execute_general_pushpop_property (context, context_property,
- grob_property_path, new_value);
+ sloppy_general_pushpop_property (context, context_property,
+ grob_property_path, new_value);
}
-
/*
-
Grob descriptions (ie. alists with layout properties) are
represented as a (ALIST . BASED-ON) pair, where BASED-ON is the
alist defined in a parent context. BASED-ON should always be a tail
of ALIST.
- Push or pop (depending on value of VAL) a single entry entry from a
+ Push or pop (depending on value of VAL) a single entry from a
translator property list by name of PROP. GROB_PROPERTY_PATH
indicates nested alists, eg. '(beamed-stem-lengths details)
-
*/
void
execute_override_property (Context *context,
- SCM context_property,
- SCM grob_property_path,
- SCM new_value)
+ SCM context_property,
+ SCM grob_property_path,
+ SCM new_value)
{
SCM current_context_val = SCM_EOL;
-
+
Context *where = context->where_defined (context_property,
- ¤t_context_val);
+ ¤t_context_val);
/*
Don't mess with MIDI.
SCM symbol = scm_car (grob_property_path);
if (scm_is_pair (scm_cdr (grob_property_path)))
{
- new_value = nested_property_alist (ly_assoc_get (symbol, target_alist,
- SCM_EOL),
- scm_cdr (grob_property_path),
- new_value);
+ new_value = nested_property_alist (ly_assoc_get (symbol, target_alist,
+ SCM_EOL),
+ scm_cdr (grob_property_path),
+ new_value);
}
/* it's tempting to replace the head of the list if it's the same
target_alist = scm_acons (symbol, new_value, target_alist);
bool ok = true;
- if (!ly_is_procedure (new_value)
- && !is_simple_closure (new_value))
- ok = type_check_assignment (symbol, new_value,
- ly_symbol2scm ("backend-type?"));
+ bool pc = is_unpure_pure_container (new_value);
+ SCM vals[] = {pc ? unpure_pure_container_unpure_part (new_value) : new_value,
+ pc ? unpure_pure_container_pure_part (new_value) : SCM_BOOL_F
+ };
+
+ for (int i = 0; i < 2; i++)
+ if (!ly_is_procedure (vals[i])
+ && !is_simple_closure (vals[i]))
+ ok = ok && type_check_assignment (symbol, vals[i],
+ ly_symbol2scm ("backend-type?"));
/*
tack onto alist. We can use set_car, since
}
}
+/*
+ do a pop (indicated by new_value==SCM_UNDEFINED) or push
+ */
void
-execute_general_pushpop_property (Context *context,
- SCM context_property,
- SCM grob_property_path,
- SCM new_value)
+sloppy_general_pushpop_property (Context *context,
+ SCM context_property,
+ SCM grob_property_path,
+ SCM new_value)
{
- if (new_value != SCM_UNDEFINED)
- execute_override_property (context, context_property,
- grob_property_path,
- new_value);
- else
+ if (new_value == SCM_UNDEFINED)
execute_revert_property (context, context_property,
- grob_property_path);
+ grob_property_path);
+ else
+ execute_override_property (context, context_property,
+ grob_property_path,
+ new_value);
}
+/*
+ Revert the property given by property_path.
+*/
void
execute_revert_property (Context *context,
- SCM context_property,
- SCM grob_property_path)
+ SCM context_property,
+ SCM grob_property_path)
{
- /*
- revert.
- */
SCM current_context_val = SCM_EOL;
- if (context->where_defined (context_property, ¤t_context_val) == context)
+ if (context->where_defined (context_property, ¤t_context_val)
+ == context)
{
SCM current_alist = scm_car (current_context_val);
SCM daddy = scm_cdr (current_context_val);
if (!scm_is_pair (grob_property_path)
- || !scm_is_symbol (scm_car (grob_property_path)))
- {
- programming_error ("Grob property path should be list of symbols.");
- return;
- }
-
- SCM symbol = scm_car (grob_property_path);
+ || !scm_is_symbol (scm_car (grob_property_path)))
+ {
+ programming_error ("Grob property path should be list of symbols.");
+ return;
+ }
+ SCM symbol = scm_car (grob_property_path);
if (scm_is_pair (scm_cdr (grob_property_path)))
- {
- SCM current_sub_alist = ly_assoc_get (symbol, current_alist, SCM_EOL);
- SCM new_val
- = nested_property_revert_alist (current_sub_alist,
- scm_cdr (grob_property_path));
-
- if (scm_is_pair (current_alist)
- && scm_caar (current_alist) == symbol
- && current_alist != daddy)
- current_alist = scm_cdr (current_alist);
-
- current_alist = scm_acons (symbol, new_val, current_alist);
- scm_set_car_x (current_context_val, current_alist);
- }
+ {
+ SCM current_sub_alist = ly_assoc_get (symbol, current_alist, SCM_EOL);
+ SCM new_val
+ = nested_property_revert_alist (current_sub_alist,
+ scm_cdr (grob_property_path));
+
+ if (scm_is_pair (current_alist)
+ && scm_caar (current_alist) == symbol
+ && current_alist != daddy)
+ current_alist = scm_cdr (current_alist);
+
+ current_alist = scm_acons (symbol, new_val, current_alist);
+ scm_set_car_x (current_context_val, current_alist);
+ }
else
- {
- SCM new_alist = evict_from_alist (symbol, current_alist, daddy);
-
- if (new_alist == daddy)
- context->unset_property (context_property);
- else
- context->set_property (context_property,
- scm_cons (new_alist, daddy));
- }
+ {
+ SCM new_alist = evict_from_alist (symbol, current_alist, daddy);
+
+ if (new_alist == daddy)
+ context->unset_property (context_property);
+ else
+ context->set_property (context_property,
+ scm_cons (new_alist, daddy));
+ }
}
}
-
+/*
+ Convenience: a push/pop grob property using a single grob_property
+ as argument.
+*/
void
execute_pushpop_property (Context *context,
- SCM context_property,
- SCM grob_property,
- SCM new_value
- )
+ SCM context_property,
+ SCM grob_property,
+ SCM new_value)
{
general_pushpop_property (context, context_property,
- scm_list_1 (grob_property),
- new_value);
+ scm_list_1 (grob_property),
+ new_value);
}
-
+
/*
PRE_INIT_OPS is in the order specified, and hence must be reversed.
*/
void
apply_property_operations (Context *tg, SCM pre_init_ops)
{
- SCM correct_order = scm_reverse (pre_init_ops);
- for (SCM s = correct_order; scm_is_pair (s); s = scm_cdr (s))
+ for (SCM s = pre_init_ops; scm_is_pair (s); s = scm_cdr (s))
{
SCM entry = scm_car (s);
SCM type = scm_car (entry);
entry = scm_cdr (entry);
if (type == ly_symbol2scm ("push"))
- {
- SCM context_prop = scm_car (entry);
- SCM val = scm_cadr (entry);
- SCM grob_prop_path = scm_cddr (entry);
- execute_general_pushpop_property (tg, context_prop, grob_prop_path, val);
- }
+ {
+ SCM context_prop = scm_car (entry);
+ SCM val = scm_cadr (entry);
+ SCM grob_prop_path = scm_cddr (entry);
+ sloppy_general_pushpop_property (tg, context_prop, grob_prop_path, val);
+ }
else if (type == ly_symbol2scm ("pop"))
- {
- SCM context_prop = scm_car (entry);
- SCM val = SCM_UNDEFINED;
- SCM grob_prop_path = scm_cdr (entry);
- execute_general_pushpop_property (tg, context_prop, grob_prop_path, val);
- }
+ {
+ SCM context_prop = scm_car (entry);
+ SCM val = SCM_UNDEFINED;
+ SCM grob_prop_path = scm_cdr (entry);
+ sloppy_general_pushpop_property (tg, context_prop, grob_prop_path, val);
+ }
else if (type == ly_symbol2scm ("assign"))
- tg->set_property (scm_car (entry), scm_cadr (entry));
+ tg->set_property (scm_car (entry), scm_cadr (entry));
+ else if (type == ly_symbol2scm ("apply"))
+ scm_apply_1 (scm_car (entry), tg->self_scm (), scm_cdr (entry));
+ else if (type == ly_symbol2scm ("unset"))
+ tg->unset_property (scm_car (entry));
}
}
SCM daddy_props
= (tg->get_parent_context ())
- ? updated_grob_properties (tg->get_parent_context (), sym)
- : SCM_EOL;
+ ? updated_grob_properties (tg->get_parent_context (), sym)
+ : SCM_EOL;
if (!scm_is_pair (props))
{
SCM *tail = ©
SCM p = scm_car (props);
while (p != based_on)
- {
- *tail = scm_cons (scm_car (p), daddy_props);
- tail = SCM_CDRLOC (*tail);
- p = scm_cdr (p);
- }
+ {
+ *tail = scm_cons (scm_car (p), daddy_props);
+ tail = SCM_CDRLOC (*tail);
+ p = scm_cdr (p);
+ }
scm_set_car_x (props, copy);
scm_set_cdr_x (props, daddy_props);
projects / lilypond.git / blobdiff