math/texvc.ml

   1 (* vim: set sw=8 ts=8 et: *)
   2 exception LexerException of string
   3
   4 (* *)
   5 let lexer_token_safe lexbuf =
   6     try Lexer.token lexbuf
   7     with Failure s -> raise (LexerException s)
   8
   9 (* *)
  10 let render tmppath finalpath tree backcolor =
  11     let outtex = Util.mapjoin Texutil.render_tex tree in
  12     let md5 = Digest.to_hex (Digest.string outtex) in
  13     begin
  14         let mathml = Mathml.render tree
  15         and html = Html.render tree
  16         in print_string (match (html,!Html.conservativeness,mathml) with
  17             None,_,None -> "+" ^ md5
  18           | Some h,Html.CONSERVATIVE,None -> "c" ^ md5  ^ h
  19           | Some h,Html.MODERATE,None -> "m" ^ md5  ^ h
  20           | Some h,Html.LIBERAL,None -> "l" ^ md5  ^ h
  21           | Some h,Html.CONSERVATIVE,Some m -> "C" ^ md5  ^ h ^ "\000" ^ m
  22           | Some h,Html.MODERATE,Some m -> "M" ^ md5  ^ h ^ "\000" ^ m
  23           | Some h,Html.LIBERAL,Some m -> "L" ^ md5 ^ h ^ "\000" ^ m
  24           | None,_,Some m -> "X" ^ md5   ^ m
  25         );
  26         Render.render tmppath finalpath outtex md5 backcolor
  27     end
  28
  29 (* TODO: document
  30  * Arguments:
  31  * 1st :
  32  * 2nd :
  33  * 3rd :
  34  * 4th : encoding (Default: UTF-8)
  35  * 5th : color (Default: rgb 1.0 1.0 1.0)
  36  *
  37  * Output one character:
  38  *  S : Parsing error
  39  *  E : Lexer exception raised
  40  *  F : TeX function not recognized
  41  *  - : Generic/Default failure code. Might be an invalid argument,
  42  *      output file already exist, a problem with an external
  43  *      command ...
  44  * *)
  45 let _ =
  46     Texutil.set_encoding (try Sys.argv.(4) with _ -> "UTF-8");
  47     try render Sys.argv.(1) Sys.argv.(2) (
  48         Parser.tex_expr lexer_token_safe (
  49             Lexing.from_string Sys.argv.(3))
  50         ) (try Sys.argv.(5) with _ -> "rgb 1.0 1.0 1.0")
  51     with Parsing.Parse_error -> print_string "S"
  52        | LexerException _ -> print_string "E"
  53        | Texutil.Illegal_tex_function s -> print_string ("F" ^ s)
  54        | Util.FileAlreadyExists -> print_string "-"
  55        | Invalid_argument _ -> print_string "-"
  56        | Failure _ -> print_string "-"
  57        | Render.ExternalCommandFailure s -> ()
  58        | _ -> print_string "-"