src/Pure/Thy/latex.ML
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Tue, 08 Aug 2000 16:57:44 +0200
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(*  Title:      Pure/Thy/latex.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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LaTeX presentation primitives (based on outer lexical syntax).
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*)
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signature LATEX =
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sig
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  datatype token = Basic of OuterLex.token | Markup of string | MarkupEnv of string | Verbatim
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  val output_tokens: (token * string) list -> string
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  val isabelle_file: string -> string
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  val old_symbol_source: 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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  val setup: (theory -> theory) list
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end;
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structure Latex: LATEX =
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struct
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(* symbol output *)
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local
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val output_chr = fn
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  " " => "\\ " |
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  "\n" => "\\isanewline\n" |
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  "$" => "\\$" |
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  "&" => "\\&" |
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  "%" => "\\%" |
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  "#" => "\\#" |
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  "_" => "\\_" |
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  "{" => "{\\isabraceleft}" |
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  "}" => "{\\isabraceright}" |
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  "~" => "{\\isatilde}" |
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  "^" => "{\\isacircum}" |
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  "\"" => "{\"}" |
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  "\\" => "{\\isabackslash}" |
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  c => c;
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fun output_sym s =
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  if size s = 1 then output_chr s
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  else
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    (case explode s of
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      cs as "\\" :: "<" :: "^" :: _ => implode (map output_chr cs)
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    | "\\" :: "<" :: cs => "{\\isasym" ^ implode (#1 (Library.split_last cs)) ^ "}"
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    | _ => sys_error "output_sym");
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in
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val output_symbols = implode o map output_sym;
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val output_syms = output_symbols o Symbol.explode;
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end;
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(* token output *)
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structure T = OuterLex;
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datatype token =
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  Basic of T.token |
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  Markup of string |
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  MarkupEnv of string |
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  Verbatim;
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val invisible_token = T.keyword_with (equal ";") orf T.is_kind T.Comment;
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fun strip_blanks s =
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  implode (#1 (Library.take_suffix Symbol.is_blank
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    (#2 (Library.take_prefix Symbol.is_blank (explode s)))));
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fun output_tok (Basic tok, _) =
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      let val s = T.val_of tok in
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        if invisible_token tok then ""
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        else if T.is_kind T.Command tok then
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          if s = "{" then "{\\isabeginblock}"
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          else if s = "}" then "{\\isaendblock}"
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          else "\\isacommand{" ^ output_syms s ^ "}"
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        else if T.is_kind T.Keyword tok andalso Syntax.is_identifier s then
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          "\\isakeyword{" ^ output_syms s ^ "}"
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        else if T.is_kind T.String tok then output_syms (quote s)
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        else if T.is_kind T.Verbatim tok then output_syms (enclose "{*" "*}" s)
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        else output_syms s
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      end
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  | output_tok (Markup cmd, txt) = "%\n\\isamarkup" ^ cmd ^ "{" ^ strip_blanks txt ^ "}\n"
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  | output_tok (MarkupEnv cmd, txt) = "%\n\\begin{isamarkup" ^ cmd ^ "}%\n" ^
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      strip_blanks txt ^ "%\n\\end{isamarkup" ^ cmd ^ "}%\n"
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  | output_tok (Verbatim, txt) = "%\n" ^ strip_blanks txt ^ "\n";
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val output_tokens = implode o map output_tok;
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(* theory presentation *)
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val isabelle_file = enclose
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  "\\begin{isabelle}%\n"
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  "\\end{isabelle}%\n\
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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 old_symbol_source name syms =
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  isabelle_file ("\\isamarkupheader{" ^ output_syms name ^ "}%\n" ^ output_symbols 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, Symbol.symbolsN];
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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, real (Symbol.length syms)) end;
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val token_translation =
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  map (fn s => (latexN, s, apfst (enclose "\\mbox{" "}") o latex_output))
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    Syntax.standard_token_classes;
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val _ = Symbol.add_mode latexN latex_output;
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val setup = [Theory.add_tokentrfuns token_translation];
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end;