/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 2004--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 2004--2015 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
bool
typecheck_grob (SCM symbol, SCM value)
{
- if (is_unpure_pure_container (value))
- return typecheck_grob (symbol, unpure_pure_container_unpure_part (value))
- && typecheck_grob (symbol, unpure_pure_container_pure_part (value));
+ if (Unpure_pure_container *upc = Unpure_pure_container::unsmob (value))
+ return typecheck_grob (symbol, upc->unpure_part ())
+ && typecheck_grob (symbol, upc->pure_part ());
return ly_is_procedure (value)
- || Simple_closure::unsmob (value)
+ || Simple_closure::is_smob (value)
|| type_check_assignment (symbol, value, ly_symbol2scm ("backend-type?"));
}
class Grob_properties : public Simple_smob<Grob_properties>
{
public:
- static int print_smob (SCM, SCM, scm_print_state *);
- static SCM mark_smob (SCM);
+ SCM mark_smob ();
static const char type_p_name_[];
private:
friend class Grob_property_info;
const char Grob_properties::type_p_name_[] = "ly:grob-properties?";
SCM
-Grob_properties::mark_smob (SCM smob)
+Grob_properties::mark_smob ()
{
- Grob_properties *gp = (Grob_properties *) SCM_SMOB_DATA (smob);
- scm_gc_mark (gp->alist_);
- scm_gc_mark (gp->based_on_);
- scm_gc_mark (gp->cooked_);
- return gp->cooked_from_;
-}
-
-int
-Grob_properties::print_smob (SCM /*smob*/, SCM port, scm_print_state *)
-{
- scm_puts ("#<Grob_properties>", port);
-
- return 1;
+ scm_gc_mark (alist_);
+ scm_gc_mark (based_on_);
+ scm_gc_mark (cooked_);
+ return cooked_from_;
}
LY_DEFINE (ly_make_grob_properties, "ly:make-grob-properties",
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 from a
+ Push a single entry from a
translator property list by name of PROP. GROB_PROPERTY_PATH
indicates nested alists, eg. '(beamed-stem-lengths details)
+
+ Return value can be passed to matched_pop and will only cancel the
+ same override then.
*/
-void
+SCM
Grob_property_info::push (SCM grob_property_path, SCM new_value)
{
/*
Don't mess with MIDI.
*/
if (!create ())
- return;
+ return SCM_EOL;
SCM symbol = scm_car (grob_property_path);
SCM rest = scm_cdr (grob_property_path);
{
// poor man's typechecking
if (typecheck_grob (symbol, nested_create_alist (rest, new_value))) {
- props_->alist_ = scm_acons (grob_property_path, new_value, props_->alist_);
+ SCM cell = scm_cons (grob_property_path, new_value);
+ props_->alist_ = scm_cons (cell, props_->alist_);
props_->nested_++;
+ return cell;
}
- return;
+ return SCM_EOL;
}
/* it's tempting to replace the head of the list if it's the same
*/
if (typecheck_grob (symbol, new_value))
- props_->alist_ = scm_acons (symbol, new_value, props_->alist_);
+ {
+ SCM cell = scm_cons (symbol, new_value);
+ props_->alist_ = scm_cons (cell, props_->alist_);
+ return cell;
+ }
+ return SCM_EOL;
+}
+
+void
+Grob_property_info::matched_pop (SCM cell)
+{
+ if (!scm_is_pair (cell))
+ return;
+ if (!check ())
+ return;
+ SCM current_alist = props_->alist_;
+ SCM daddy = props_->based_on_;
+ for (SCM p = current_alist; !scm_is_eq (p, daddy); p = scm_cdr (p))
+ {
+ if (scm_is_eq (scm_car (p), cell))
+ {
+ if (scm_is_pair (scm_car (cell)))
+ props_->nested_--;
+ props_->alist_ = partial_list_copy (current_alist, p, scm_cdr (p));
+ return;
+ }
+ }
+ return;
}
/*