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(* Title: Pure/Thy/thy_edit.ML
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ID: $Id$
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Author: Makarius
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Basic editing of theory sources.
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*)
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signature THY_EDIT =
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sig
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val token_source: Position.T -> (string, 'a) Source.source ->
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(OuterLex.token, Position.T * (Symbol.symbol, (string, 'a) Source.source) Source.source)
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Source.source
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val parse_tokens: Position.T -> (string, 'a) Source.source -> OuterLex.token list
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val present_token: OuterLex.token -> output
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datatype item_kind = Whitespace | Junk | Commandspan of string
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type item = item_kind * OuterLex.token list
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val item_source: Position.T -> (string, 'a) Source.source ->
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(item, (OuterLex.token, Position.T * (Symbol.symbol, (string, 'a) Source.source) Source.source)
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Source.source) Source.source
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val parse_items: Position.T -> (string, 'a) Source.source -> item list
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val present_item: item -> output
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val present_html: Path.T -> Path.T -> unit
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end;
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structure ThyEdit: THY_EDIT =
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struct
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structure T = OuterLex;
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structure P = OuterParse;
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(** tokens **)
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(* parse *)
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fun token_source pos src =
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Symbol.source true src
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|> T.source (SOME false) OuterSyntax.get_lexicons pos;
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fun parse_tokens pos src = Source.exhaust (token_source pos src);
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(* present *)
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local
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val token_kind_markup =
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fn T.Command => (Markup.commandN, [])
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| T.Keyword => (Markup.keywordN, [])
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| T.String => Markup.string
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| T.AltString => Markup.altstring
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| T.Verbatim => Markup.verbatim
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| T.Comment => Markup.comment
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| T.Sync => Markup.control
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| T.Malformed => Markup.malformed
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| T.Error _ => Markup.malformed
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| T.EOF => Markup.control
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| _ => Markup.none;
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in
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fun present_token tok =
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Markup.enclose (token_kind_markup (T.kind_of tok)) (Output.output (T.unparse tok));
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end;
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(** items **)
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datatype item_kind = Whitespace | Junk | Commandspan of string;
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type item = item_kind * OuterLex.token list;
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(* parse *)
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local
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val whitespace = Scan.many1 (T.is_kind T.Space orf T.is_kind T.Comment);
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val before_command = Scan.optional whitespace [] -- Scan.ahead P.command;
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val body = Scan.repeat1 (Scan.unless before_command P.not_eof);
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val item =
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whitespace >> pair Whitespace ||
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body >> pair Junk ||
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before_command -- P.not_eof -- Scan.optional body []
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>> (fn (((ws, name), c), bs) => (Commandspan name, ws @ [c] @ bs));
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in
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fun item_source pos src =
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token_source pos src
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|> Source.source T.stopper (Scan.bulk item) NONE;
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end;
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fun parse_items pos src = Source.exhaust (item_source pos src);
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(* present *)
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local
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fun item_kind_markup Whitespace = Markup.whitespace
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| item_kind_markup Junk = Markup.junk
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| item_kind_markup (Commandspan name) = Markup.commandspan name;
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in
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fun present_item (kind, toks) =
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Markup.enclose (item_kind_markup kind) (implode (map present_token toks));
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end;
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(* HTML presentation -- example *)
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fun present_html inpath outpath =
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Source.exhaust (item_source (Position.path inpath) (Source.of_string (File.read inpath)))
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|> HTML.html_mode (implode o map present_item)
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|> enclose
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(HTML.begin_document (Path.implode (Path.base inpath)) ^ "<div class=\"source\"><pre>")
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("</pre></div>" ^ HTML.end_document)
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|> File.write outpath;
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end;
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