src/Pure/Thy/latex.ML
author wenzelm
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permissions -rw-r--r--
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(*  Title:      Pure/Thy/latex.ML
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    Author:     Markus Wenzel, TU Muenchen
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LaTeX presentation elements -- based on outer lexical syntax.
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*)
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signature LATEX =
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sig
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  val output_ascii: string -> string
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  val latex_control: Symbol.symbol
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  val is_latex_control: Symbol.symbol -> bool
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  val embed_raw: string -> string
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  val output_known_symbols: (string -> bool) * (string -> bool) ->
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    Symbol.symbol list -> string
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  val output_symbols: Symbol.symbol list -> string
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  val output_token: Token.T -> string
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  val begin_delim: string -> string
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  val end_delim: string -> string
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  val begin_tag: string -> string
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  val end_tag: string -> string
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  val environment: string -> string -> string
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  val tex_trailer: string
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  val isabelle_theory: string -> string -> string
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  val symbol_source: (string -> bool) * (string -> bool) ->
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    string -> Symbol.symbol list -> string
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  val theory_entry: string -> string
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  val modes: string list
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end;
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structure Latex: LATEX =
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struct
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(* output verbatim ASCII *)
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val output_ascii =
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  translate_string
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    (fn " " => "\\ "
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      | "\t" => "\\ "
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      | "\n" => "\\isanewline\n"
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      | s =>
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          if exists_string (fn s' => s = s') "\"#$%&',-<>\\^_`{}~"
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          then enclose "{\\char`\\" "}" s else s);
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(* output symbols *)
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val latex_control = "\<^latex>";
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fun is_latex_control s = s = latex_control;
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val embed_raw = prefix latex_control o cartouche;
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local
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val char_table =
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  Symtab.make
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   [("\007", "{\\isacharbell}"),
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    ("!", "{\\isacharbang}"),
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    ("\"", "{\\isachardoublequote}"),
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    ("#", "{\\isacharhash}"),
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    ("$", "{\\isachardollar}"),
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    ("%", "{\\isacharpercent}"),
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    ("&", "{\\isacharampersand}"),
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    ("'", "{\\isacharprime}"),
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    ("(", "{\\isacharparenleft}"),
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    (")", "{\\isacharparenright}"),
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    ("*", "{\\isacharasterisk}"),
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    ("+", "{\\isacharplus}"),
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    (",", "{\\isacharcomma}"),
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    ("-", "{\\isacharminus}"),
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    (".", "{\\isachardot}"),
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    ("/", "{\\isacharslash}"),
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    (":", "{\\isacharcolon}"),
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    (";", "{\\isacharsemicolon}"),
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    ("<", "{\\isacharless}"),
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    ("=", "{\\isacharequal}"),
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    (">", "{\\isachargreater}"),
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    ("?", "{\\isacharquery}"),
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    ("@", "{\\isacharat}"),
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    ("[", "{\\isacharbrackleft}"),
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    ("\\", "{\\isacharbackslash}"),
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    ("]", "{\\isacharbrackright}"),
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    ("^", "{\\isacharcircum}"),
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    ("_", "{\\isacharunderscore}"),
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    ("`", "{\\isacharbackquote}"),
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    ("{", "{\\isacharbraceleft}"),
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    ("|", "{\\isacharbar}"),
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    ("}", "{\\isacharbraceright}"),
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    ("~", "{\\isachartilde}")];
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fun output_chr " " = "\\ "
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  | output_chr "\t" = "\\ "
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  | output_chr "\n" = "\\isanewline\n"
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  | output_chr c =
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      (case Symtab.lookup char_table c of
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        SOME s => s
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      | NONE => if Symbol.is_ascii_digit c then enclose "{\\isadigit{" "}}" c else c);
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val output_chrs = translate_string output_chr;
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fun output_known_sym (known_sym, known_ctrl) sym =
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  (case Symbol.decode sym of
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    Symbol.Char s => output_chr s
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  | Symbol.UTF8 s => s
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  | Symbol.Sym s => if known_sym s then enclose "{\\isasym" "}" s else output_chrs sym
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  | Symbol.Control s => if known_ctrl s then enclose "\\isactrl" " " s else output_chrs sym
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  | Symbol.Malformed s => error (Symbol.malformed_msg s)
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  | Symbol.EOF => error "Bad EOF symbol");
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val scan_latex_length =
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  Scan.many1 (fn (s, _) => Symbol.not_eof s andalso not (is_latex_control s))
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    >> (Symbol.length o map Symbol_Pos.symbol) ||
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  Scan.one (is_latex_control o Symbol_Pos.symbol) --
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    Scan.option (Scan.permissive Symbol_Pos.scan_cartouche "") >> K 0;
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fun scan_latex known =
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  Scan.one (is_latex_control o Symbol_Pos.symbol) |--
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    Symbol_Pos.scan_cartouche_content "Embedded LaTeX: " >> (implode o map Symbol_Pos.symbol) ||
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  Scan.one (Symbol.not_eof o Symbol_Pos.symbol) >> (output_known_sym known o Symbol_Pos.symbol);
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fun read scan syms =
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  Scan.read Symbol_Pos.stopper (Scan.repeat scan) (map (rpair Position.none) syms);
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in
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fun length_symbols syms =
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  fold Integer.add (these (read scan_latex_length syms)) 0;
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fun output_known_symbols known syms =
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  if exists is_latex_control syms then
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    (case read (scan_latex known) syms of
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      SOME ss => implode ss
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    | NONE => error ("Malformed embedded LaTeX: " ^ quote (Symbol.beginning 10 syms)))
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  else implode (map (output_known_sym known) syms);
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val output_symbols = output_known_symbols (K true, K true);
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val output_syms = output_symbols o Symbol.explode;
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val output_syms_antiq =
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  (fn Antiquote.Text ss => output_symbols (map Symbol_Pos.symbol ss)
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    | Antiquote.Control {name = (name, _), body, ...} =>
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        "\\isaantiqcontrol{" ^ output_symbols (Symbol.explode name) ^ "}" ^
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        output_symbols (map Symbol_Pos.symbol body)
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    | Antiquote.Antiq {body, ...} =>
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        enclose "%\n\\isaantiq\n" "{}%\n\\endisaantiq\n"
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          (output_symbols (map Symbol_Pos.symbol body)));
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end;
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(* output token *)
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fun output_token tok =
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  let val s = Token.content_of tok in
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    if Token.is_kind Token.Comment tok then ""
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    else if Token.is_command tok then
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      "\\isacommand{" ^ output_syms s ^ "}"
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    else if Token.is_kind Token.Keyword tok andalso Symbol.is_ascii_identifier s then
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      "\\isakeyword{" ^ output_syms s ^ "}"
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    else if Token.is_kind Token.String tok then
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      enclose "{\\isachardoublequoteopen}" "{\\isachardoublequoteclose}" (output_syms s)
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    else if Token.is_kind Token.Alt_String tok then
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      enclose "{\\isacharbackquoteopen}" "{\\isacharbackquoteclose}" (output_syms s)
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    else if Token.is_kind Token.Verbatim tok then
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      let
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        val ants = Antiquote.read (Token.input_of tok);
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        val out = implode (map output_syms_antiq ants);
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      in enclose "{\\isacharverbatimopen}" "{\\isacharverbatimclose}" out end
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    else if Token.is_kind Token.Cartouche tok then
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      enclose "{\\isacartoucheopen}" "{\\isacartoucheclose}" (output_syms s)
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    else output_syms s
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  end handle ERROR msg => error (msg ^ Position.here (Token.pos_of tok));
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(* tags *)
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val begin_delim = enclose "%\n\\isadelim" "\n";
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val end_delim = enclose "%\n\\endisadelim" "\n";
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val begin_tag = enclose "%\n\\isatag" "\n";
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fun end_tag tg = enclose "%\n\\endisatag" "\n" tg ^ enclose "{\\isafold" "}%\n" tg;
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36ba0d4a836c flag_markup;
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(* theory presentation *)
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fun environment name =
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  enclose ("%\n\\begin{" ^ name ^ "}%\n") ("%\n\\end{" ^ name ^ "}");
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val tex_trailer =
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  "%%% Local Variables:\n\
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  \%%% mode: latex\n\
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  \%%% TeX-master: \"root\"\n\
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  \%%% End:\n";
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fun isabelle_theory name txt =
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  "%\n\\begin{isabellebody}%\n\
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  \\\setisabellecontext{" ^ output_syms name ^ "}%\n" ^ txt ^
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  "%\n\\end{isabellebody}%\n" ^ tex_trailer;
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fun symbol_source known name syms =
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  isabelle_theory name
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    ("\\isamarkupfile{" ^ output_known_symbols known (Symbol.explode name) ^ "}%\n" ^
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      output_known_symbols known syms);
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fun theory_entry name = "\\input{" ^ name ^ ".tex}\n\n";
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(* print mode *)
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val latexN = "latex";
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val modes = [latexN, Symbol.xsymbolsN];
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fun latex_output str =
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  let val syms = Symbol.explode str
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  in (output_symbols syms, length_symbols syms) end;
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fun latex_markup (s, _) =
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  if s = Markup.commandN orelse s = Markup.keyword1N orelse s = Markup.keyword3N
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  then ("\\isacommand{", "}")
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  else if s = Markup.keyword2N
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  then ("\\isakeyword{", "}")
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  else Markup.no_output;
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fun latex_indent "" _ = ""
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  | latex_indent s _ = enclose "\\isaindent{" "}" s;
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val _ = Output.add_mode latexN latex_output embed_raw;
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val _ = Markup.add_mode latexN latex_markup;
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val _ = Pretty.add_mode latexN latex_indent;
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end;