wenzelm@32240: (*  Title:      doc-src/rail.ML
wenzelm@32240:     Author:     Michael Kerscher, TUM
wenzelm@32240: 
wenzelm@32240: Railroad diagrams for LaTeX.
wenzelm@32240: *)
wenzelm@32240: 
wenzelm@32240: structure Rail =
wenzelm@32240: struct
wenzelm@32240: 
wenzelm@32132: datatype token =
wenzelm@32132:   Identifier of string |
wenzelm@32132:   Special_Identifier of string |
wenzelm@32132:   Text of string |
wenzelm@32132:   Anot of string |
wenzelm@32132:   Symbol of string |
wenzelm@32132:   EOF;
wenzelm@32132: 
wenzelm@32132: fun is_identifier (Identifier _) = true
wenzelm@32132:   | is_identifier (Special_Identifier _ ) = true
wenzelm@32132:   | is_identifier _ = false;
wenzelm@32240: 
wenzelm@32132: fun is_text (Text _) = true
wenzelm@32132:   | is_text _ = false;
wenzelm@32132: 
wenzelm@32132: fun is_anot (Anot _) = true
wenzelm@32132:   | is_anot _ = false;
wenzelm@32132: 
wenzelm@32132: fun is_symbol (Symbol _) = true
wenzelm@32132:   | is_symbol _ = false;
wenzelm@32132: 
wenzelm@32132: fun is_ str = (fn s => s = Symbol str);
wenzelm@32132: 
wenzelm@32132: 
wenzelm@32132: local (* copied from antiquote-setup... *)
wenzelm@32132: fun translate f = Symbol.explode #> map f #> implode;
wenzelm@32132: 
wenzelm@32132: fun clean_name "\<dots>" = "dots"
wenzelm@32132:   | clean_name ".." = "ddot"
wenzelm@32132:   | clean_name "." = "dot"
wenzelm@32132:   | clean_name "_" = "underscore"
wenzelm@32132:   | clean_name "{" = "braceleft"
wenzelm@32132:   | clean_name "}" = "braceright"
wenzelm@32132:   | clean_name s = s |> translate (fn "_" => "-" | "\<dash>" => "-" | c => c);
wenzelm@32132: 
wenzelm@32132: fun no_check _ _ = true;
wenzelm@32132: 
wenzelm@32132: fun false_check _ _ = false;
wenzelm@32132: 
wenzelm@32132: fun thy_check intern defined ctxt =
wenzelm@32132:   let val thy = ProofContext.theory_of ctxt
wenzelm@32132:   in defined thy o intern thy end;
wenzelm@32132: 
wenzelm@32132: fun check_tool name =
wenzelm@32132:   File.exists (Path.append (Path.explode "~~/lib/Tools") (Path.basic name));
wenzelm@32132: 
wenzelm@32132: val arg = enclose "{" "}";
wenzelm@32132: 
wenzelm@32132: val markup_table =
wenzelm@32132: (*  [(kind, (markup, check, style))*)
wenzelm@32132:   Symtab.make [
wenzelm@32132:   ("syntax", ("", no_check, true)),
wenzelm@36973:   ("command", ("isacommand", K (is_some o Keyword.command_keyword), true)),
wenzelm@36973:   ("keyword", ("isakeyword", K Keyword.is_keyword, true)),
wenzelm@36973:   ("element", ("isakeyword", K Keyword.is_keyword, true)),
wenzelm@32132:   ("method", ("", thy_check Method.intern Method.defined, true)),
wenzelm@32132:   ("attribute", ("", thy_check Attrib.intern Attrib.defined, true)),
wenzelm@32132:   ("fact", ("", no_check, true)),
wenzelm@32132:   ("variable", ("", no_check, true)),
wenzelm@32132:   ("case", ("", no_check, true)),
wenzelm@37216:   ("antiquotation", ("", K Thy_Output.defined_command, true)),
wenzelm@37216:   ("antiquotation option", ("", K Thy_Output.defined_option, true)), (* kann mein scanner nicht erkennen *)
wenzelm@32132:   ("setting", ("isatt", (fn _ => fn name => is_some (OS.Process.getEnv name)), true)),
wenzelm@32132:   ("inference", ("", no_check, true)),
wenzelm@32132:   ("executable", ("isatt", no_check, true)),
wenzelm@32132:   ("tool", ("isatt", K check_tool, true)),
wenzelm@32132:   ("file", ("isatt", K (File.exists o Path.explode), true)),
wenzelm@37216:   ("theory", ("", K Thy_Info.known_thy, true))
wenzelm@32132:   ];
wenzelm@32132: 
wenzelm@32132: in
wenzelm@32132: 
wenzelm@32132: fun decode_link ctxt (kind,index,logic,name) =
wenzelm@32132:   let
wenzelm@32132:   val (markup, check, style) = case Symtab.lookup markup_table kind of
wenzelm@32132:     SOME x => x
wenzelm@32132:   | NONE => ("", false_check, false);
wenzelm@32132:   val hyper_name =
wenzelm@32132:     "{" ^ Long_Name.append kind (Long_Name.append logic (clean_name name)) ^ "}";
wenzelm@32132:   val hyper =
wenzelm@32132:     enclose ("\\hyperlink" ^ hyper_name ^ "{") "}" #>
wenzelm@32132:     index = "def" ? enclose ("\\hypertarget" ^ hyper_name ^ "{") "}";
wenzelm@32132:   val idx =
wenzelm@32132:     if index = "" then ""
wenzelm@32132:     else "\\index" ^ index ^ arg logic ^ arg kind ^ arg name;
wenzelm@32132:   in
wenzelm@32132:   if check ctxt name then
wenzelm@32132:     (idx ^
wenzelm@32132:     (Output.output name
wenzelm@32132:       |> (if markup = "" then I else enclose ("\\" ^ markup ^ "{") "}")
wenzelm@37216:       |> (if ! Thy_Output.quotes then quote else I)
wenzelm@37216:       |> (if ! Thy_Output.display then enclose "\\begin{isabelle}%\n" "%\n\\end{isabelle}"
wenzelm@32449:           else hyper o enclose "\\mbox{\\isa{" "}}")), style)
wenzelm@32132:   else ("Bad " ^ kind ^ " " ^ name, false)
wenzelm@32132:   end;
wenzelm@32132: end;
wenzelm@32132: 
wenzelm@32132: val blanks =
wenzelm@32132:   Scan.many Symbol.is_blank >> implode;
wenzelm@32132: 
wenzelm@32132: val scan_symbol =
wenzelm@32132:   $$ ";" || $$ ":"|| $$ "("|| $$ ")"|| $$ "+"|| $$ "|"|| $$ "*"|| $$ "?"|| $$ "\\";
wenzelm@32132: 
wenzelm@32132: (* escaped version *)
wenzelm@32132: val scan_link = (* @{kind{_def|_ref (logic) name} *)
wenzelm@32132:   let
wenzelm@32132:     fun pseudo_antiquote inner_scan = ($$ "@" ^^ $$ "{") |-- inner_scan --| (blanks -- $$ "}");
wenzelm@32132:     fun parens scan = $$ "(" |-- scan --| $$ ")";
wenzelm@32132:     fun opt_quotes scan = $$ "'" |-- scan --| $$ "'" || scan;
wenzelm@32132:     val letters = Scan.many Symbol.is_letter >> implode;
wenzelm@32132:     val kind_name = letters;
wenzelm@32132:     val opt_kind_type = Scan.optional (
wenzelm@32132:       $$ "_" |-- (Scan.this_string "def" || Scan.this_string "ref")) "";
wenzelm@32132:     val logic_name = letters;
wenzelm@32132:     val escaped_singlequote = $$ "\\" |-- $$ "'";
wenzelm@32132:     val text = Scan.repeat (Scan.one Symbol.is_letter || escaped_singlequote) >> implode;
wenzelm@32132:   in
wenzelm@32132:    pseudo_antiquote (
wenzelm@32132:     kind_name -- opt_kind_type --
wenzelm@32132:     (blanks |-- Scan.optional ( parens logic_name ) "") --
wenzelm@32132:     (blanks |-- opt_quotes text) )
wenzelm@32132:     >> (fn (((kind,index),logic),name) => (kind, index, logic, name))
wenzelm@32132: end;
wenzelm@32132: 
wenzelm@32132: (* escaped version *)
wenzelm@32240: fun scan_identifier ctxt =
wenzelm@32132:   let fun is_identifier_start s =
wenzelm@32132:     Symbol.is_letter s orelse
wenzelm@32132:     s = "_"
wenzelm@32132:   fun is_identifier_rest s =
wenzelm@32132:     Symbol.is_letter s orelse
wenzelm@32132:     Symbol.is_digit s orelse
wenzelm@32132:     s = "_" orelse
wenzelm@32132:     s = "."
wenzelm@32132:   in
wenzelm@32132:   (Scan.one is_identifier_start :::
wenzelm@32132:     Scan.repeat (Scan.one is_identifier_rest || ($$ "\\" |-- $$ "'"))
wenzelm@32132:   ) >> (Identifier o enclose "\\isa{" "}" o Output.output o implode) ||
wenzelm@32132:   scan_link >> (decode_link ctxt) >>
wenzelm@32132:     (fn (txt, style) =>
wenzelm@32449:         if style then Special_Identifier(txt)
wenzelm@32449:         else Identifier(txt))
wenzelm@32132: end;
wenzelm@32132: 
wenzelm@32132: fun scan_anot ctxt =
wenzelm@32132:   let val scan_anot =
wenzelm@32132:     Scan.many (fn s =>
wenzelm@32132:       s <> "\n" andalso
wenzelm@32132:       s <> "\t" andalso
wenzelm@32132:       s <> "]" andalso
wenzelm@32132:       Symbol.is_regular s) >> implode
wenzelm@32132:   in
wenzelm@32132:   $$ "[" |-- scan_link --| $$ "]" >> (fst o (decode_link ctxt)) ||
wenzelm@32132:   $$ "[" |-- scan_anot --| $$ "]" >> Output.output
wenzelm@32132: end;
wenzelm@32132: 
wenzelm@32132: (* escaped version *)
wenzelm@32132: fun scan_text ctxt =
wenzelm@32132:   let
wenzelm@32132:     val text_sq =
wenzelm@32132:       Scan.repeat (
wenzelm@32132:         Scan.one (fn s =>
wenzelm@32449:           s <> "\n" andalso
wenzelm@32449:           s <> "\t" andalso
wenzelm@32449:           s <> "'" andalso
wenzelm@32449:           s <> "\\" andalso
wenzelm@32449:           Symbol.is_regular s) ||
wenzelm@32449:         ($$ "\\" |-- $$ "'")
wenzelm@32132:       ) >> implode
wenzelm@32132:   fun quoted scan = $$ "'" |-- scan --| $$ "'";
wenzelm@32132:   in
wenzelm@32132:   quoted scan_link >> (fst o (decode_link ctxt)) ||
wenzelm@32132:   quoted text_sq >> (enclose "\\isa{" "}" o Output.output)
wenzelm@32132: end;
wenzelm@32132: 
wenzelm@32132: fun scan_rail ctxt =
wenzelm@32132:   Scan.repeat ( blanks |-- (
wenzelm@32132:     scan_identifier ctxt ||
wenzelm@32132:     scan_anot ctxt >> Anot ||
wenzelm@32132:     scan_text ctxt >> Text ||
wenzelm@32132:     scan_symbol >> Symbol)
wenzelm@32132:   ) --| blanks;
wenzelm@32132: 
wenzelm@32132: fun lex_rail txt ctxt = (* Symbol_Pos fuer spaeter durchgereicht *)
wenzelm@32132:   Symbol.scanner "Malformed rail-declaration" (scan_rail ctxt) (map fst (Symbol_Pos.explode txt));
wenzelm@32132: 
wenzelm@32132: val lex = lex_rail;
wenzelm@32132: 
wenzelm@32132: datatype id_kind = UNKNOWN | TOKEN | TERM | NTERM;
wenzelm@32132: 
wenzelm@32132: datatype id_type =
wenzelm@32132:   Id of string * id_kind |
wenzelm@32132:   Null_Id;
wenzelm@32132: 
wenzelm@32132: datatype body_kind =
wenzelm@32132:   CAT | BAR | PLUS |
wenzelm@32132:   CR | EMPTY | ANNOTE | IDENT | STRING |
wenzelm@32132:   Null_Kind;
wenzelm@32132: 
wenzelm@32240: datatype body_type =
wenzelm@32132:   Body of body_kind * string * string * id_type * body_type list |
wenzelm@32132:   Body_Pos of body_kind * string * string * id_type * body_type list * int * int |
wenzelm@32132:   Empty_Body |
wenzelm@32132:   Null_Body;
wenzelm@32132: 
wenzelm@32240: datatype rule =
wenzelm@32132:   Rule of id_type * body_type;
wenzelm@32132: 
wenzelm@32132: fun new_id id kind = Id (id, kind);
wenzelm@32132: 
wenzelm@32132: fun is_empty (Body(kind,_,_,_,_)) = kind = EMPTY;
wenzelm@32132: 
wenzelm@32132: fun new_body (kind, Null_Body, Null_Body) = Body (kind, "", "", Null_Id, [])
wenzelm@32132:   | new_body (kind, body1, body2) = Body (kind, "", "", Null_Id, body1 :: [body2]);
wenzelm@32132: 
wenzelm@32132: fun is_kind_of kind (Body(bodyKind,_,_,_,_)) = kind = bodyKind
wenzelm@32132:   | is_kind_of _ _ = false;
wenzelm@32132: 
wenzelm@32132: fun add_list (Body(kind, text, annot, id, bodies), body) =
wenzelm@32132:   Body(kind, text, annot, id, bodies @ [body]);
wenzelm@32132: 
wenzelm@32240: fun cat_body_lists (Body(kind, text, annot, id, bodies1), Body(_,_,_,_, bodies2)) =
wenzelm@32132:       Body(kind, text, annot, id, bodies1 @ bodies2);
wenzelm@32132: 
wenzelm@32132: fun add_body (kind, body1 as Body(kind1,_,_,_,_), body2 as Body(kind2,_,_,_,_)) =
wenzelm@32132:   if kind = kind1 andalso kind <> BAR then
wenzelm@32132:     if kind = kind2 then
wenzelm@32132:       cat_body_lists(body1, body2)
wenzelm@32132:     else (* kind <> kind2 *)
wenzelm@32132:       add_list(body1, body2)
wenzelm@32132:   else (* kind <> kind1 orelse kind = BAR *)
wenzelm@32132:     if kind = kind2 then
wenzelm@32132:       cat_body_lists(add_list(new_body(kind,Null_Body,Null_Body), body1), body2)
wenzelm@32132:     else (* kind <> kind2 *)
wenzelm@32132:       add_list(add_list(new_body(kind,Null_Body,Null_Body), body1), body2);
wenzelm@32132: 
wenzelm@32132: fun rev_body (body as Body (kind, text, annot, id, [])) = body
wenzelm@32132:   | rev_body (Body (CAT, text, annot, id, bodies)) =
wenzelm@32132:       Body(CAT, text, annot, id, map rev_body (rev bodies))
wenzelm@32132:   | rev_body (Body (kind, text, annot, id, bodies)) =
wenzelm@32132:       Body(kind, text, annot, id, map rev_body bodies)
wenzelm@32132:   | rev_body body = body;
wenzelm@32132: 
wenzelm@32132: fun set_body_text text (Body(k,_,a,i,b)) = Body(k,text,a,i,b);
wenzelm@32132: fun set_body_anot anot (Body(k,t,_,i,b)) = Body(k,t,anot,i,b);
wenzelm@32132: fun set_body_ident id (Body(k,t,a,_,b)) = Body(k,t,a, new_id id TOKEN,b);
wenzelm@32132: fun set_body_special_ident id (Body(k,t,a,_,b)) = Body(k,t,a, new_id id TERM,b);
wenzelm@32132: 
wenzelm@32132: 
wenzelm@32132: fun mk_eof _ = EOF;
wenzelm@32132: fun is_eof s = s = EOF;
wenzelm@32132: val stopper = Scan.stopper mk_eof is_eof;
wenzelm@32132: 
wenzelm@32132: (* TODO: change this, so the next or next two tokens are printed *)
wenzelm@32132: fun lex_err msg (cs, _) = "rail grammar error: " ^ msg cs;
wenzelm@32132: fun !!! msg scan = Scan.!! (lex_err (K msg)) scan;
wenzelm@32132: fun $$$ tok = Scan.one (is_ tok);
wenzelm@32132: 
wenzelm@32132: 
wenzelm@32132: local
wenzelm@32132: fun new_bar_body([], body2) = body2
wenzelm@32132:   | new_bar_body(body1::bodies, body2) =
wenzelm@32132:       add_body(BAR, body1, new_bar_body(bodies, body2));
wenzelm@32132: 
wenzelm@32132: fun new_cat_body(body::[]) = body
wenzelm@32132:   | new_cat_body(body1::bodies) = add_body(CAT, body1, new_cat_body(bodies));
wenzelm@32132: 
wenzelm@32132: fun new_annote_body (Anot anot) =
wenzelm@32132:   set_body_text anot (new_body(ANNOTE, Empty_Body, Empty_Body));
wenzelm@32132: 
wenzelm@32132: fun new_text_annote_body (Text text, Anot anot) =
wenzelm@32132:   set_body_anot anot (set_body_text text (new_body(STRING, Empty_Body, Empty_Body)));
wenzelm@32132: 
wenzelm@32132: fun new_ident_body (Identifier ident, Anot anot) =
wenzelm@32132:       set_body_anot anot (set_body_ident ident (new_body(IDENT, Empty_Body, Empty_Body)))
wenzelm@32132:   | new_ident_body (Special_Identifier ident, Anot anot) =
wenzelm@32132:       set_body_anot anot (set_body_special_ident ident (new_body(IDENT, Empty_Body, Empty_Body)));
wenzelm@32132: 
wenzelm@32132: val new_empty_body = new_body(EMPTY, Null_Body, Null_Body);
wenzelm@32132: in
wenzelm@32132: 
wenzelm@32132: fun parse_body x =
wenzelm@32132:   (
wenzelm@32132:   Scan.repeat1 (parse_body0 --| $$$ "|") -- !!! "body0 expected" (parse_body0) >>
wenzelm@32132:     new_bar_body ||
wenzelm@32132:   parse_body0
wenzelm@32132:   ) x
wenzelm@32132: and parse_body0 x =
wenzelm@32132:   (
wenzelm@32132:   Scan.one is_anot -- !!! "body1 expected" (parse_body1) >>
wenzelm@32132:     (fn (anot, body) => add_body(CAT, new_annote_body(anot), body))  ||
wenzelm@32132:   parse_body1
wenzelm@32132:   ) x
wenzelm@32132: and parse_body1 x =
wenzelm@32132:   (
wenzelm@32132:   parse_body2 -- ($$$ "*" |-- !!! "body4e expected" (parse_body4e)) >>
wenzelm@32132:     (fn (body1, body2) =>
wenzelm@32132:       if is_empty body2 then
wenzelm@32449:         add_body(PLUS, new_empty_body, rev_body body1)
wenzelm@32132:       else
wenzelm@32449:         add_body(BAR, new_empty_body, add_body (PLUS, body1, rev_body body2)) ) ||
wenzelm@32240:   parse_body2 -- ($$$ "+" |-- !!! "body4e expected" (parse_body4e)) >>
wenzelm@32132:     (fn (body1, body2) => new_body (PLUS, body1, rev_body body2) ) ||
wenzelm@32132:   parse_body2e
wenzelm@32132:   ) x
wenzelm@32132: and parse_body2e x =
wenzelm@32132:   (
wenzelm@32132:   parse_body2 ||
wenzelm@32132:   (fn toks => (new_empty_body, toks))
wenzelm@32132:   ) x
wenzelm@32132: and parse_body2 x =
wenzelm@32132:   (
wenzelm@32132:   Scan.repeat1 (parse_body3) >> new_cat_body
wenzelm@32132:   ) x
wenzelm@32132: and parse_body3 x =
wenzelm@32132:   (
wenzelm@32132:   parse_body4 --| $$$ "?" >> (fn body => new_body (BAR, new_empty_body, body) ) ||
wenzelm@32132:   parse_body4
wenzelm@32132:   ) x
wenzelm@32132: and parse_body4e x =
wenzelm@32132:   (
wenzelm@32132:   parse_body4 ||
wenzelm@32132:   (fn toks => (new_empty_body, toks))
wenzelm@32132:   ) x
wenzelm@32132: and parse_body4 x =
wenzelm@32132:   (
wenzelm@32132:   $$$ "(" |-- !!! "body0 or ')' expected" (parse_body --| $$$ ")") ||
wenzelm@32132:   Scan.one is_text -- (Scan.optional (Scan.one is_anot) (Anot(""))) >>
wenzelm@32240:     (fn (text, anot) => new_text_annote_body (text,anot)) ||
wenzelm@32132:   Scan.one is_identifier -- (Scan.optional (Scan.one is_anot) (Anot(""))) >>
wenzelm@32132:     (fn (id, anot) => new_ident_body (id,anot)) ||
wenzelm@32132:   $$$ "\\" >> (fn _ => new_body (CR, Null_Body, Null_Body))
wenzelm@32132:   ) x;
wenzelm@32132: end;
wenzelm@32132: 
wenzelm@32132: fun new_named_rule (Identifier name, body) = Rule(Id(name, UNKNOWN), body)
wenzelm@32132:   | new_named_rule (Special_Identifier name, body) = Rule(Id(name, UNKNOWN), body);
wenzelm@32132: fun new_anonym_rule body = Rule(Null_Id, body);
wenzelm@32132: 
wenzelm@32132: val parse_rule =
wenzelm@32132:   (Scan.one (is_identifier) -- ($$$ ":" |-- !!! "body expected" (parse_body)) ) >>
wenzelm@32132:     new_named_rule ||
wenzelm@32132:   parse_body >> new_anonym_rule;
wenzelm@32132: 
wenzelm@32132: val parse_rules =
wenzelm@32132:   Scan.repeat ( parse_rule --| $$$ ";") @@@ Scan.single parse_rule;
wenzelm@32132: 
wenzelm@32132: fun parse_rail s =
wenzelm@32132:   Scan.read stopper parse_rules s;
wenzelm@32132: 
wenzelm@32132: val parse = parse_rail;
wenzelm@32132: 
wenzelm@32132: fun getystart (Body_Pos(_,_,_,_,_,ystart,_)) = ystart;
wenzelm@32132: fun getynext (Body_Pos(_,_,_,_,_,_,ynext)) = ynext;
wenzelm@32132: 
wenzelm@32132: fun position_body (body as Body(kind, text, annot, id, bodies), ystart) =
wenzelm@32132:   let fun max (x,y) = if x > y then x else y
wenzelm@32132:     fun set_body_position (Body(kind, text, annot, id, bodies), ystart, ynext) =
wenzelm@32449:           Body_Pos(kind, text, annot, id, bodies, ystart, ynext)
wenzelm@32132:     fun pos_bodies_cat ([],_,ynext,liste) = (liste, ynext)
wenzelm@32132:       | pos_bodies_cat (x::xs, ystart, ynext, liste) =
wenzelm@32449:           if is_kind_of CR x then
wenzelm@32449:               (case set_body_position(x, ystart, ynext+1) of
wenzelm@32449:                 body as Body_Pos(_,_,_,_,_,_,ynext1) =>
wenzelm@32449:                   pos_bodies_cat(xs, ynext1, max(ynext,ynext1), liste@[body])
wenzelm@32449:               )
wenzelm@32449:           else
wenzelm@32449:               (case position_body(x, ystart) of
wenzelm@32449:                 body as Body_Pos(_,_,_,_,_,_,ynext1) =>
wenzelm@32449:                   pos_bodies_cat(xs, ystart, max(ynext,ynext1), liste@[body])
wenzelm@32449:               )
wenzelm@32132:     fun pos_bodies_bar_plus ([],_,ynext,liste) = (liste, ynext)
wenzelm@32132:       | pos_bodies_bar_plus (x::xs, ystart, ynext, liste) =
wenzelm@32449:           (case position_body(x, ystart) of
wenzelm@32449:             body as Body_Pos(_,_,_,_,_,_,ynext1) =>
wenzelm@32449:               pos_bodies_bar_plus(xs, ynext1, max(ynext,ynext1), liste@[body])
wenzelm@32449:           )
wenzelm@32132:   in
wenzelm@32132:   (case kind of
wenzelm@32132:     CAT => (case pos_bodies_cat(bodies,ystart,ystart+1,[]) of
wenzelm@32449:               (bodiesPos, ynext) =>
wenzelm@32449:                 Body_Pos(kind, text, annot, id, bodiesPos, ystart, ynext))
wenzelm@32132:   | BAR => (case pos_bodies_bar_plus(bodies,ystart,ystart+1,[]) of
wenzelm@32449:               (bodiesPos, ynext) =>
wenzelm@32449:                 Body_Pos(kind, text, annot, id, bodiesPos, ystart, ynext))
wenzelm@32132:   | PLUS => (case pos_bodies_bar_plus(bodies,ystart,ystart+1,[]) of
wenzelm@32449:               (bodiesPos, ynext) =>
wenzelm@32449:                 Body_Pos(kind, text, annot, id, bodiesPos, ystart, ynext))
wenzelm@32132:   | CR => set_body_position(body, ystart, ystart+3)
wenzelm@32132:   | EMPTY => set_body_position(body, ystart, ystart+1)
wenzelm@32132:   | ANNOTE => set_body_position(body, ystart, ystart+1)
wenzelm@32132:   | IDENT => set_body_position(body, ystart, ystart+1)
wenzelm@32132:   | STRING => set_body_position(body, ystart, ystart+1)
wenzelm@32132:   )
wenzelm@32132:   end;
wenzelm@32132: 
wenzelm@32132: fun format_body (Body_Pos(EMPTY,_,_,_,_,_,_), _) = ""
wenzelm@32132:   | format_body (Body_Pos(CAT,_,_,_,bodies,_,_), cent) =
wenzelm@32132:     let fun format_bodies([]) = ""
wenzelm@32449:           | format_bodies(x::xs) = format_body (x, "") ^ format_bodies(xs)
wenzelm@32132:     in
wenzelm@32132:       format_bodies(bodies)
wenzelm@32132:     end
wenzelm@32240:   | format_body (Body_Pos(BAR,_,_,_,bodies,_,_),cent) =
wenzelm@32132:     let fun format_bodies([]) = "\\rail@endbar\n"
wenzelm@32449:           | format_bodies(x::xs) =
wenzelm@32449:               "\\rail@nextbar{" ^ string_of_int(getystart(x)) ^"}\n" ^
wenzelm@32449:               format_body(x, "") ^ format_bodies(xs)
wenzelm@32132:     in
wenzelm@32132:       "\\rail@bar\n" ^ format_body(hd(bodies), "") ^ format_bodies(tl(bodies))
wenzelm@32132:     end
wenzelm@32132:   | format_body (Body_Pos(PLUS,_,_,_,x::y::xs,_,_),cent) =
wenzelm@32132:       "\\rail@plus\n" ^ format_body(x, cent) ^
wenzelm@32132:       "\\rail@nextplus{" ^ string_of_int(getystart(y)) ^ "}\n" ^
wenzelm@32132:       format_body(y, "c") ^
wenzelm@32132:       "\\rail@endplus\n"
wenzelm@32132:   | format_body (Body_Pos(ANNOTE,text,_,_,_,_,_),cent) =
wenzelm@32132:       "\\rail@annote[" ^ text ^ "]\n"
wenzelm@32132:   | format_body (Body_Pos(IDENT,_,annot,Id(name,TERM),_,_,_),cent) =
wenzelm@32132:       "\\rail@" ^ cent ^ "token{" ^ name ^ "}" ^ "[" ^ annot ^ "]\n"
wenzelm@32132:   | format_body (Body_Pos(IDENT,_,annot,Id(name,_),_,_,_),cent) =
wenzelm@32132:       "\\rail@" ^ cent ^ "nont{" ^ name ^ "}" ^ "[" ^ annot ^ "]\n"
wenzelm@32132:   | format_body (Body_Pos(CR,_,_,_,_,_,ynext),cent) =
wenzelm@32132:       "\\rail@cr{" ^ string_of_int(ynext) ^ "}\n"
wenzelm@32132:   | format_body (Body_Pos(STRING,text,annot,_,_,_,_),cent) =
wenzelm@32132:       "\\rail@" ^ cent ^ "term{" ^ text ^ "}[" ^ annot ^ "]\n"
wenzelm@32132:   | format_body _ =
wenzelm@32132:       "\\rail@unknown\n";
wenzelm@32132: 
wenzelm@32132: fun out_body (Id(name,_), body) =
wenzelm@32132:   let val bodyPos as Body_Pos(_,_,_,_,_,_,ynext) = position_body(body,0)
wenzelm@32132:   in
wenzelm@32132:     "\\rail@begin{" ^ string_of_int(ynext) ^ "}{" ^ name ^ "}\n" ^
wenzelm@32132:     format_body(bodyPos,"") ^
wenzelm@32132:     "\\rail@end\n"
wenzelm@32132:   end
wenzelm@32132:   | out_body (Null_Id, body) = out_body (Id("", UNKNOWN), body);
wenzelm@32132: 
wenzelm@32132: fun out_rule (Rule(id, body)) =
wenzelm@32132:   if is_empty body then ""
wenzelm@32132:   else out_body (id, body);
wenzelm@32132: 
wenzelm@32132: fun out_rules ([]) = ""
wenzelm@32132:   | out_rules (rule::rules) = out_rule rule ^ out_rules rules;
wenzelm@32132: 
wenzelm@32132: val output_no_rules =
wenzelm@32132:   "\\rail@begin{1}{}\n" ^
wenzelm@32132:   "\\rail@setbox{\\bfseries ???}\n" ^
wenzelm@32132:   "\\rail@oval\n" ^
wenzelm@32132:   "\\rail@end\n";
wenzelm@32132: 
wenzelm@32132: 
wenzelm@32132: fun print (SOME rules) =
wenzelm@32132:     "\\begin{railoutput}\n" ^
wenzelm@32132:     out_rules rules ^
wenzelm@32132:     "\\end{railoutput}\n"
wenzelm@32132:   | print (NONE) =
wenzelm@32132:     "\\begin{railoutput}\n" ^
wenzelm@32132:     output_no_rules ^
wenzelm@32132:     "\\end{railoutput}\n";
wenzelm@32132: 
wenzelm@32132: fun process txt ctxt =
wenzelm@32132:   lex txt ctxt
wenzelm@32132:   |> parse
wenzelm@32132:   |> print;
wenzelm@32132: 
wenzelm@37216: val _ = Thy_Output.antiquotation "rail" (Scan.lift (Parse.position Args.name))
wenzelm@32132:   (fn {context = ctxt,...} => fn txt => process txt ctxt);
wenzelm@32240: 
wenzelm@32240: end;
wenzelm@32240: