return layout;
}
+/* Return a copy of the top of $papers stack, or $defaultpaper if the
+ * stack is empty */
Output_def *
get_paper (Lily_parser *parser)
{
- SCM id = parser->lexer_->lookup_identifier ("$defaultpaper");
- Output_def *layout = unsmob_output_def (id);
+ SCM papers = parser->lexer_->lookup_identifier ("$papers");
+ Output_def *layout = ((papers == SCM_UNDEFINED) || scm_is_null (papers)) ?
+ 0 : unsmob_output_def (scm_car (papers));
+ SCM default_paper = parser->lexer_->lookup_identifier ("$defaultpaper");
+ layout = layout ? layout : unsmob_output_def (default_paper);
layout = layout ? dynamic_cast<Output_def *> (layout->clone ()) : new Output_def;
layout->set_variable (ly_symbol2scm ("is-paper"), SCM_BOOL_T);
return layout;
}
+/* Stack a paper on top of $papers */
+void
+stack_paper (Lily_parser *parser, Output_def *paper)
+{
+ parser->lexer_->set_identifier (ly_symbol2scm ("$papers"),
+ scm_cons (paper->self_scm (),
+ parser->lexer_->lookup_identifier ("$papers")));
+}
+
+/* Unstack a paper from $papers */
+void
+unstack_paper (Lily_parser *parser)
+{
+ parser->lexer_->set_identifier (ly_symbol2scm ("$papers"),
+ scm_cdr (parser->lexer_->lookup_identifier ("$papers")));
+}
+
+/* Change the paper on top of $papers */
+void
+set_paper (Lily_parser *parser, Output_def *paper)
+{
+ scm_set_car_x (parser->lexer_->lookup_identifier ("$papers"), paper->self_scm ());
+}
+
SCM
get_header (Lily_parser *parser)
{