(*  Title:      antiquote_setup.ML

     ID:         $Id$

     Author:     Makarius

 Auxiliary antiquotations for Isabelle manuals.

 *)

 local

 structure O = IsarOutput;

 val str_of_source = space_implode " " o map Args.string_of o #2 o #1 o Args.dest_src;

 fun ml_val (txt1, "") = "fn _ => (" ^ txt1 ^ ");"

   | ml_val (txt1, txt2) = "fn _ => (" ^ txt1 ^ ": " ^ txt2 ^ ");";

 fun ml_type (txt1, "") = "val _ = NONE : (" ^ txt1 ^ ") option;"

   | ml_type (txt1, txt2) = "val _ = [NONE : (" ^ txt1 ^ ") option, NONE : (" ^ txt2 ^ ") option];";

 fun ml_structure (txt, _) = "functor DUMMY_FUNCTOR() = struct structure DUMMY = " ^ txt ^ " end;"

 fun ml_functor _ = "val _ = ();";  (*no check!*)

 val verbatim = space_implode "\\verb,|," o map (enclose "\\verb|" "|") o space_explode "|";

 fun index_ml kind ml src ctxt (txt1, txt2) =

   let

     val txt = if txt2 = "" then txt1 else

       if kind = "type"

         then txt1 ^ " = " ^ txt2

         else txt1 ^ ": " ^ txt2;

     val txt' = if kind = "" then txt else kind ^ " " ^ txt;

     val _ = Context.use_mltext (ml (txt1, txt2)) false (SOME (ProofContext.theory_of ctxt));

   in

     "\\indexml" ^ kind ^ enclose "{" "}"

       (translate_string (fn "_" => "-" | ">" => "$>$" | c => c) txt1) ^

     ((if ! O.source then str_of_source src else txt')

     |> (if ! O.quotes then quote else I)

     |> (if ! O.display then enclose "\\begin{verbatim}\n" "\n\\end{verbatim}"

     else split_lines #> map verbatim #> space_implode "\\isasep\\isanewline%\n"))

   end;

 fun output_verbatim _ _ = split_lines #> map verbatim #> space_implode "\\isasep\\isanewline%\n";

 fun arguments x = O.args (Scan.lift (Args.name -- Scan.optional (Args.colon |-- Args.name) "")) x;

 fun pretty_thy_file name = (ThyLoad.check_thy Path.current name false; Pretty.str name);

 in

 val _ = O.add_commands

  [("index_ML", arguments (index_ml "" ml_val)),

   ("index_ML_type", arguments (index_ml "type" ml_type)),

   ("index_ML_structure", arguments (index_ml "structure" ml_structure)),

   ("index_ML_functor", arguments (index_ml "functor" ml_functor)),

   ("ML_functor", O.args (Scan.lift Args.name) output_verbatim),

   ("verbatim", O.args (Scan.lift Args.name) output_verbatim),

   ("thy_file", O.args (Scan.lift Args.name) (O.output (K pretty_thy_file)))];

 end;