/usr/share/ada/adainclude/opentoken/html_lexer-tags.ads is in libopentoken3-dev 4.0b-3.
This file is owned by root:root, with mode 0o644.
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--
-- Copyright (C) 1999 Christoph Karl Walter Grein
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package 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 3, or (at your option)
-- any later version. The OpenToken package 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 distributed with the OpenToken
-- package; see file GPL.txt. If not, write to the Free Software Foundation,
-- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
-------------------------------------------------------------------------------
with Ada.Strings.Maps.Constants;
with OpenToken.Text_Feeder;
with OpenToken.Text_Feeder.String;
with OpenToken.Token.Enumerated.Analyzer;
with OpenToken.Recognizer.Character_Set;
with OpenToken.Recognizer.End_Of_File;
with OpenToken.Recognizer.Keyword;
with OpenToken.Recognizer.Nothing;
with OpenToken.Recognizer.Separator;
with OpenToken.Recognizer.String;
pragma Elaborate_All (OpenToken.Recognizer.Character_Set, OpenToken.Recognizer.End_Of_File, OpenToken.Recognizer.Keyword,
OpenToken.Recognizer.Nothing, OpenToken.Recognizer.Separator, OpenToken.Recognizer.String);
private package HTML_Lexer.Tags is
---------------------------------------------------------------------
-- This ia a lexical analyser for the HTML language. It analyses
-- only the tag contents:
--
-- <Tag Attribute=Value Attribute="String"> not considered </Tag>
--
-- This very first version is not complete. It simply serves as a
-- demonstration of feasibility.
-- Missing tags and attributes are returned as Value.
---------------------------------------------------------------------
type Tag_Token is (-- Tag delimiters
Start_Tag_Opener, -- <
End_Tag_Opener, -- </
Tag_Closer, -- >
-- Tags (without delimiters, ... standing for attributes)
HTML, -- <HTML ...>
Head, -- <HEAD ...>
Meta, -- <META ...>
HTML_Body, -- <BODY ...>
Anchor, -- <A ...>
Heading_1, -- <H1 ...>
Image, -- <IMG ...>
-- add further tags here
-- Attributes (the left side of assignments without = and following value)
Content, -- CONTENT=
Hyper_Reference, -- HREF=
Link_Type, -- TYPE=
Name, -- NAME=
Title, -- TITLE=
-- add further attributes here
-- The assignment character in attributes
Assignment, -- =
-- Values (the right side of assignments)
Value, -- unquoted
String, -- "quoted"
-- Syntax error
Bad_Token,
--
Whitespace, End_Of_Tag);
package Master_Tag_Token is new OpenToken.Token.Enumerated (Tag_Token);
package Tokenizer is new Master_Tag_Token.Analyzer;
use type Ada.Strings.Maps.Character_Set;
Syntax: constant Tokenizer.Syntax :=
(Start_Tag_Opener => Tokenizer.Get(OpenToken.Recognizer.Separator.Get ("<")),
End_Tag_Opener => Tokenizer.Get(OpenToken.Recognizer.Separator.Get ("</")),
Tag_Closer => Tokenizer.Get(OpenToken.Recognizer.Separator.Get (">")),
HTML => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("HTML")),
Head => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("Head")),
Meta => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("Meta")),
HTML_Body => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("HTML_Body")),
Heading_1 => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("H1")),
Anchor => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("A")),
Image => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("IMG")),
Content => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("CONTENT")),
Hyper_Reference => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("HREF")),
Link_Type => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("TYPE")),
Name => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("NAME")),
Title => Tokenizer.Get(OpenToken.Recognizer.Keyword.Get ("TITLE")),
Assignment => Tokenizer.Get(OpenToken.Recognizer.Separator.Get ("=")),
Value => Tokenizer.Get(OpenToken.Recognizer.Character_Set.Get
(Ada.Strings.Maps.Constants.Letter_Set or
Ada.Strings.Maps.Constants.Decimal_Digit_Set or
Ada.Strings.Maps.To_Set (".-"),
Reportable => True)),
String => Tokenizer.Get(OpenToken.Recognizer.String.Get (Double_Delimiter => False)),
Whitespace => Tokenizer.Get(OpenToken.Recognizer.Character_Set.Get
(OpenToken.Recognizer.Character_Set.Standard_Whitespace)),
Bad_Token => Tokenizer.Get(OpenToken.Recognizer.Nothing.Get),
End_Of_Tag => Tokenizer.Get(OpenToken.Recognizer.End_Of_File.Get));
Tag_Input_Feeder : aliased OpenToken.Text_Feeder.String.Instance;
Analyzer: Tokenizer.Instance := Tokenizer.Initialize (Syntax,
Default => Bad_Token,
Feeder => Tag_Input_Feeder'access);
end HTML_Lexer.Tags;
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