- local old_n = n; n = node_remove(n, n)
- node_free(old_n); if not n then return nil end
- end
- return node.mlist_to_hlist(
- to_node(conv_jchar_to_hbox(n, 0)),
- display_type, penalties)
- end,'ltj.mlist_to_hlist', 1)
+ local old_n = n; n = node_remove(n, n)
+ node_free(old_n); if not n then return nil end
+ end
+ return to_node(conv_jchar_to_hbox(n, 0))
+ end
+ -- LaTeX 2020-02-02 seems to have pre_mlist_to_hlist callback
+ if luatexbase.callbacktypes['pre_mlist_to_hlist'] then
+ luatexbase.add_to_callback('pre_mlist_to_hlist',
+ mlist_callback_ltja(n), 'ltj.mlist_to_hlist_pre', 1)
+ else
+ luatexbase.add_to_callback('mlist_to_hlist',
+ function (n, display_type, penalties)
+ return mlist_to_hlist(mlist_callback_ltja(n),display_type, penalties)
+ end,'ltj.mlist_to_hlist', 1)
+ end
+end