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|
(*************************************************************************)
(* *)
(* Objective Caml LablTk library *)
(* *)
(* Jacques Garrigue, Kyoto University RIMS *)
(* *)
(* Copyright 1999 Institut National de Recherche en Informatique et *)
(* en Automatique and Kyoto University. All rights reserved. *)
(* This file is distributed under the terms of the GNU Library *)
(* General Public License, with the special exception on linking *)
(* described in file ../../../LICENSE. *)
(* *)
(*************************************************************************)
(* $Id$ *)
open StdLabels
open Tk
open Jg_tk
open Parser
let tags =
["control"; "define"; "structure"; "char";
"infix"; "label"; "uident"]
and colors =
["blue"; "forestgreen"; "purple"; "gray40";
"indianred4"; "saddlebrown"; "midnightblue"]
let init_tags tw =
List.iter2 tags colors ~f:
begin fun tag col ->
Text.tag_configure tw ~tag ~foreground:(`Color col)
end;
Text.tag_configure tw ~tag:"error" ~foreground:`Red;
Text.tag_configure tw ~tag:"error" ~relief:`Raised;
Text.tag_raise tw ~tag:"error"
let tag ?(start=tstart) ?(stop=tend) tw =
let tpos c = (Text.index tw ~index:start, [`Char c]) in
let text = Text.get tw ~start ~stop in
let buffer = Lexing.from_string text in
List.iter tags
~f:(fun tag -> Text.tag_remove tw ~start ~stop ~tag);
let last = ref (EOF, 0, 0) in
try
while true do
let token = Lexer.token buffer
and start = Lexing.lexeme_start buffer
and stop = Lexing.lexeme_end buffer in
let tag =
match token with
AMPERAMPER
| AMPERSAND
| BARBAR
| DO | DONE
| DOWNTO
| ELSE
| FOR
| IF
| LAZY
| MATCH
| OR
| THEN
| TO
| TRY
| WHEN
| WHILE
| WITH
-> "control"
| AND
| AS
| BAR
| CLASS
| CONSTRAINT
| EXCEPTION
| EXTERNAL
| FUN
| FUNCTION
| FUNCTOR
| IN
| INHERIT
| INITIALIZER
| LET
| METHOD
| MODULE
| MUTABLE
| NEW
| OF
| PRIVATE
| REC
| TYPE
| VAL
| VIRTUAL
-> "define"
| BEGIN
| END
| INCLUDE
| OBJECT
| OPEN
| SIG
| STRUCT
-> "structure"
| CHAR _
| STRING _
-> "char"
| BACKQUOTE
| INFIXOP1 _
| INFIXOP2 _
| INFIXOP3 _
| INFIXOP4 _
| PREFIXOP _
| SHARP
-> "infix"
| LABEL _
| OPTLABEL _
| QUESTION
| TILDE
-> "label"
| UIDENT _ -> "uident"
| LIDENT _ ->
begin match !last with
(QUESTION | TILDE), _, _ -> "label"
| _ -> ""
end
| COLON ->
begin match !last with
LIDENT _, lstart, lstop ->
if lstop = start then
Text.tag_add tw ~tag:"label"
~start:(tpos lstart) ~stop:(tpos stop);
""
| _ -> ""
end
| EOF -> raise End_of_file
| _ -> ""
in
if tag <> "" then
Text.tag_add tw ~tag ~start:(tpos start) ~stop:(tpos stop);
last := (token, start, stop)
done
with
End_of_file -> ()
| Lexer.Error (err, s, e) -> ()
|
