--- /dev/null
+(* Copyright (C) 2005, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+(* $Id: cicNotationLexer.ml 11231 2011-03-30 11:52:27Z ricciott $ *)
+
+open Printf
+
+exception Error of int * int * string
+
+module StringSet = Set.Make(String)
+
+(* Lexer *)
+let regexp number = xml_digit+
+let regexp utf8_blank = " " | "\r\n" | "\n" | "\t" | [160] (* this is a nbsp *)
+let regexp percentage =
+ ('-' | "") [ '0' - '9' ] + '%'
+let regexp floatwithunit =
+ ('-' | "") [ '0' - '9' ] + ["."] [ '0' - '9' ] + ([ 'a' - 'z' ] + | "" )
+let regexp color = "#" [ '0' - '9' 'a' - 'f' 'A' - 'F' ] [ '0' - '9' 'a' - 'f'
+'A' - 'F' ] [ '0' - '9' 'a' - 'f' 'A' - 'F' ] [ '0' - '9' 'a' - 'f' 'A' - 'F' ]
+[ '0' - '9' 'a' - 'f' 'A' - 'F' ] [ '0' - '9' 'a' - 'f' 'A' - 'F' ]
+
+ (* ZACK: breaks unicode's binder followed by an ascii letter without blank *)
+(* let regexp ident_letter = xml_letter *)
+
+let regexp ident_letter = [ 'a' - 'z' 'A' - 'Z' ]
+
+ (* must be in sync with "is_ligature_char" below *)
+let regexp ligature_char = [ "'`~!?@*()[]<>-+=|:;.,/\"" ]
+let regexp ligature = ligature_char ligature_char+
+
+let regexp we_proved = "we" utf8_blank+ "proved"
+let regexp we_have = "we" utf8_blank+ "have"
+let regexp let_rec = "let" utf8_blank+ "rec"
+let regexp let_corec = "let" utf8_blank+ "corec"
+let regexp ident_decoration = '\'' | '?' | '`'
+let regexp ident_cont = ident_letter | xml_digit | '_'
+let regexp ident_start = ident_letter
+let regexp ident = ident_letter ident_cont* ident_decoration*
+let regexp variable_ident = '_' '_' number
+let regexp pident = '_' ident
+
+let regexp uri_step = [ 'a' - 'z' 'A' - 'Z' '0' - '9' '_' '-' ''' ]+
+
+let regexp uri =
+ ("cic:/" | "theory:/") (* schema *)
+(* ident ('/' ident)* |+ path +| *)
+ uri_step ('/' uri_step)* (* path *)
+ ('.' ident)+ (* ext *)
+(* ("#xpointer(" number ('/' number)+ ")")? (* xpointer *) *)
+ ("(" number (',' number)* ")")? (* reference spec *)
+
+let regexp qstring = '"' [^ '"']* '"'
+let regexp hreftag = "<A"
+let regexp href = "href=\"" uri "\""
+let regexp hreftitle = "title=" qstring
+let regexp hrefclose = "</A>"
+
+let regexp tex_token = '\\' ident
+
+let regexp delim_begin = "\\["
+let regexp delim_end = "\\]"
+
+let regexp qkeyword = "'" ( ident | pident ) "'"
+
+let regexp implicit = '?'
+let regexp placeholder = '%'
+let regexp meta = implicit number
+
+let regexp csymbol = '\'' ident
+
+let regexp begin_group = "@{" | "${"
+let regexp end_group = '}'
+let regexp wildcard = "$_"
+let regexp ast_ident = "@" ident
+let regexp ast_csymbol = "@" csymbol
+let regexp meta_ident = "$" ident
+let regexp meta_anonymous = "$_"
+
+let regexp begincomment = "(**" utf8_blank
+let regexp beginnote = "(*"
+let regexp endcomment = "*)"
+(* let regexp comment_char = [^'*'] | '*'[^')']
+let regexp note = "|+" ([^'*'] | "**") comment_char* "+|" *)
+
+let level1_layouts =
+ [ "sub"; "sup";
+ "below"; "above";
+ "over"; "atop"; "frac";
+ "sqrt"; "root"; "mstyle" ; "mpadded"; "maction"
+
+ ]
+
+let level1_keywords =
+ [ "hbox"; "hvbox"; "hovbox"; "vbox";
+ "break";
+ "list0"; "list1"; "sep";
+ "opt";
+ "term"; "ident"; "number";
+ ] @ level1_layouts
+
+let level2_meta_keywords =
+ [ "if"; "then"; "elCicNotationParser.se";
+ "fold"; "left"; "right"; "rec";
+ "fail";
+ "default";
+ "anonymous"; "ident"; "number"; "term"; "fresh"
+ ]
+
+ (* (string, int) Hashtbl.t, with multiple bindings.
+ * int is the unicode codepoint *)
+let ligatures = Hashtbl.create 23
+
+let _ =
+ List.iter
+ (fun (ligature, symbol) -> Hashtbl.add ligatures ligature symbol)
+ [ ("->", <:unicode<to>>); ("=>", <:unicode<Rightarrow>>);
+ (":=", <:unicode<def>>);
+ ]
+
+let regexp nreference =
+ "cic:/" (* schema *)
+ uri_step ('/' uri_step)* (* path *)
+ '.'
+ ( "dec"
+ | "def" "(" number ")"
+ | "fix" "(" number "," number "," number ")"
+ | "cfx" "(" number ")"
+ | "ind" "(" number "," number "," number ")"
+ | "con" "(" number "," number "," number ")") (* ext + reference *)
+
+let error lexbuf msg =
+ let begin_cnum, end_cnum = Ulexing.loc lexbuf in
+ raise (Error (begin_cnum, end_cnum, msg))
+let error_at_end lexbuf msg =
+ let begin_cnum, end_cnum = Ulexing.loc lexbuf in
+ raise (Error (begin_cnum, end_cnum, msg))
+
+let loc_of_buf lexbuf =
+ HExtlib.floc_of_loc (Ulexing.loc lexbuf)
+
+let return_with_loc token begin_cnum end_cnum =
+ let flocation = HExtlib.floc_of_loc (begin_cnum,end_cnum) in
+ token, flocation
+
+let return lexbuf token =
+ let begin_cnum, end_cnum = Ulexing.loc lexbuf in
+ return_with_loc token begin_cnum end_cnum
+
+let return_lexeme lexbuf name = return lexbuf (name, Ulexing.utf8_lexeme lexbuf)
+
+let return_symbol lexbuf s = return lexbuf ("SYMBOL", s)
+let return_eoi lexbuf = return lexbuf ("EOI", "")
+
+let remove_quotes s = String.sub s 1 (String.length s - 2)
+
+let mk_lexer token =
+ let tok_func stream =
+(* let lexbuf = Ulexing.from_utf8_stream stream in *)
+(** XXX Obj.magic rationale.
+ * The problem.
+ * camlp5 constraints the tok_func field of Token.glexer to have type:
+ * Stream.t char -> (Stream.t 'te * flocation_function)
+ * In order to use ulex we have (in theory) to instantiate a new lexbuf each
+ * time a char Stream.t is passed, destroying the previous lexbuf which may
+ * have consumed a character from the old stream which is lost forever :-(
+ * The "solution".
+ * Instead of passing to camlp5 a char Stream.t we pass a lexbuf, casting it to
+ * char Stream.t with Obj.magic where needed.
+ *)
+ let lexbuf = Obj.magic stream in
+ Token.make_stream_and_location
+ (fun () ->
+ try
+ token lexbuf
+ with
+ | Ulexing.Error -> error_at_end lexbuf "Unexpected character"
+ | Ulexing.InvalidCodepoint p ->
+ error_at_end lexbuf (sprintf "Invalid code point: %d" p))
+ in
+ {
+ Token.tok_func = tok_func;
+ Token.tok_using = (fun _ -> ());
+ Token.tok_removing = (fun _ -> ());
+ Token.tok_match = Token.default_match;
+ Token.tok_text = Token.lexer_text;
+ Token.tok_comm = None;
+ }
+
+let expand_macro lexbuf =
+ let macro =
+ Ulexing.utf8_sub_lexeme lexbuf 1 (Ulexing.lexeme_length lexbuf - 1)
+ in
+ try
+ ("SYMBOL", Utf8Macro.expand macro)
+ with Utf8Macro.Macro_not_found _ ->
+(* FG: unexpanded TeX macros are terminated by a space for rendering *)
+ "SYMBOL", (Ulexing.utf8_lexeme lexbuf ^ " ")
+
+let remove_quotes s = String.sub s 1 (String.length s - 2)
+let remove_left_quote s = String.sub s 1 (String.length s - 1)
+
+let rec level2_pattern_token_group counter buffer =
+ lexer
+ | end_group ->
+ if (counter > 0) then
+ Buffer.add_string buffer (Ulexing.utf8_lexeme lexbuf) ;
+ snd (Ulexing.loc lexbuf)
+ | begin_group ->
+ Buffer.add_string buffer (Ulexing.utf8_lexeme lexbuf) ;
+ ignore (level2_pattern_token_group (counter + 1) buffer lexbuf) ;
+ level2_pattern_token_group counter buffer lexbuf
+ | _ ->
+ Buffer.add_string buffer (Ulexing.utf8_lexeme lexbuf) ;
+ level2_pattern_token_group counter buffer lexbuf
+
+let read_unparsed_group token_name lexbuf =
+ let buffer = Buffer.create 16 in
+ let begin_cnum, _ = Ulexing.loc lexbuf in
+ let end_cnum = level2_pattern_token_group 0 buffer lexbuf in
+ return_with_loc (token_name, Buffer.contents buffer) begin_cnum end_cnum
+
+let handle_keywords lexbuf k name =
+ let s = Ulexing.utf8_lexeme lexbuf in
+ if k s then
+ return lexbuf ("", s)
+ else
+ return lexbuf (name, s)
+;;
+
+let rec level2_meta_token =
+ lexer
+ | utf8_blank+ -> level2_meta_token lexbuf
+ | hreftag -> return lexbuf ("ATAG","")
+ | hrefclose -> return lexbuf ("ATAGEND","")
+ | ident ->
+ handle_keywords lexbuf (fun x -> List.mem x level2_meta_keywords) "IDENT"
+ | variable_ident -> return lexbuf ("IDENT", Ulexing.utf8_lexeme lexbuf)
+ | pident ->
+ handle_keywords lexbuf (fun x -> List.mem x level2_meta_keywords) "PIDENT"
+ | "@{" -> read_unparsed_group "UNPARSED_AST" lexbuf
+ | ast_ident ->
+ return lexbuf ("UNPARSED_AST",
+ remove_left_quote (Ulexing.utf8_lexeme lexbuf))
+ | ast_csymbol ->
+ return lexbuf ("UNPARSED_AST",
+ remove_left_quote (Ulexing.utf8_lexeme lexbuf))
+ | eof -> return_eoi lexbuf
+
+let rec comment_token acc depth =
+ lexer
+ | beginnote ->
+ let acc = acc ^ Ulexing.utf8_lexeme lexbuf in
+ comment_token acc (depth + 1) lexbuf
+ | endcomment ->
+ let acc = acc ^ Ulexing.utf8_lexeme lexbuf in
+ if depth = 0
+ then acc
+ else comment_token acc (depth - 1) lexbuf
+ | _ ->
+ let acc = acc ^ Ulexing.utf8_lexeme lexbuf in
+ comment_token acc depth lexbuf
+
+ (** @param k continuation to be invoked when no ligature has been found *)
+let ligatures_token k =
+ lexer
+ | ligature ->
+ let lexeme = Ulexing.utf8_lexeme lexbuf in
+ (match List.rev (Hashtbl.find_all ligatures lexeme) with
+ | [] -> (* ligature not found, rollback and try default lexer *)
+ Ulexing.rollback lexbuf;
+ k lexbuf
+ | default_lig :: _ -> (* ligatures found, use the default one *)
+ return_symbol lexbuf default_lig)
+ | eof -> return_eoi lexbuf
+ | _ -> (* not a ligature, rollback and try default lexer *)
+ Ulexing.rollback lexbuf;
+ k lexbuf
+
+module LocalizeOD =
+ struct
+ type t = Stdpp.location
+ let compare = Pervasives.compare
+ end
+
+let update_table loc desc href loctable =
+ if desc <> None || href <> None
+ then
+ (let s,e = HExtlib.loc_of_floc loc in
+ prerr_endline (Printf.sprintf "*** [%d,%d] \"%s\",\"%s\""
+ s e (so_pp href) (so_pp desc));
+ LocalizeEnv.add loc (href,desc) loctable)
+ else loctable
+;;
+
+let get_hot_spots =
+ let rec aux loc1 desc href =
+ lexer
+ | hreftag -> aux_in_tag (Ulexing.loc lexbuf) None None lexbuf
+ | hrefclose ->
+ try
+ let loc1 = HExtlib.floc_of_loc (HExtlib.unopt loc1) in
+ let loc2 = HExtlib.floc_of_loc (Ulexing.loc lexbuf) in
+ (loc1,loc2,href,desc) :: aux None None None lexbuf
+ with Failure _ -> aux None None None lexbuf
+ | beginnote -> (* FIXME commenti come in smallLexer *)
+ let _comment = comment_token (Ulexing.utf8_lexeme lexbuf) 0 lexbuf in
+ (* let comment =
+ Ulexing.utf8_sub_lexeme lexbuf 2 (Ulexing.lexeme_length lexbuf - 4)
+ in
+ return lexbuf ("NOTE", comment) *)
+ ligatures_token (aux desc href) lexbuf
+ | begincomment -> return lexbuf ("BEGINCOMMENT","")
+ | endcomment -> return lexbuf ("ENDCOMMENT","")
+ | eof -> []
+ | _ -> aux loc1 desc href lexbuf
+ and aux_in_tag loc1 desc href = lexer
+ | utf8_blank+ -> aux_in_tag loc1 desc href lexbuf
+ | href ->
+ aux_in_tag loc1 desc
+ (Some (Ulexing.utf8_sub_lexeme lexbuf 6 (Ulexing.lexeme_length lexbuf - 7)))
+ lexbuf
+ | hreftitle ->
+ aux_in_tag loc1
+ (Some (Ulexing.utf8_sub_lexeme lexbuf 7 (Ulexing.lexeme_length lexbuf - 8)))
+ href lexbuf
+ | ">" ->
+ let merge (a,b) (c,d) = (a,d) in
+ aux (Some (merge loc1 (Ulexing.loc lexbuf))) desc href lexbuf
+ | _ -> aux None None None lexbuf
+ in aux None None None
+
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