src/Pure/Thy/latex.ML
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Thu, 21 Oct 1999 18:43:06 +0200
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output \isasymbols;
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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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Simple 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 * string | Verbatim of string
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  val token_source: token list -> string
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  val theory_entry: string -> string
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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 => "{\\isasymbol" ^ 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_syms = implode o map output_sym 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 = Basic of T.token | Markup of string * string | Verbatim of string;
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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 (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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fun token_source toks =
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  "\\begin{isabellesimple}\n" ^ output_tokens toks ^ "\\end{isabellesimple}\n";
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fun theory_entry name = "\\input{" ^ name ^ ".tex}\n";
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end;