regexp/visualizer/regexp.cgi

#!/usr/bin/perl
use strict;
use warnings;
use feature 'state';
use CGI::Carp qw(fatalsToBrowser);

use FindBin;
use lib qq[$FindBin::Bin/../lib];
use lib q[/home/wakaba/work/manakai2/lib];
use Message::CGI::Util qw/percent_decode htescape/;
use Message::CGI::HTTP;

use Regexp::Parser::Perl58;

my $cgi = Message::CGI::HTTP->new;

my $regexp = percent_decode $cgi->get_parameter ('s') // '';
$regexp = '(?:)' unless length $regexp;

my $parser = Regexp::Parser::Perl58->new;

eval {
  $parser->parse ($regexp);
};
my $eregexp = htescape $regexp;

if ($parser->errnum) {
  binmode STDOUT, ':encoding(utf-8)';
  print "Content-Type: text/html; charset=utf-8\n\n";
  print q[<!DOCTYPE HTML><html lang=en>
<title>Regular expression visualizer: $eregexp</title>
<link rel="stylesheet" href="/www/style/html/xhtml"/>
</head>
<body>
<h1>Regular expression visualizer</h1>

<p>Input: <code>], $eregexp, q[</code></p>

<p>Error: ], htescape ($parser->errmsg);
  exit;
}

require Regexp::Visualize::Simple;
my $v = Regexp::Visualize::Simple->new;
$v->push_regexp_node ($parser->root);

binmode STDOUT, ':encoding(utf-8)';
print "Content-Type: application/xhtml+xml; charset=utf-8\n\n";

print q[<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head><title>Regular expression visualizer: $eregexp</title>
<link rel="stylesheet" href="/www/style/html/xhtml"/>
</head>
<body>
<h1>Regular expression visualizer</h1>

<p>Input: <code>], $eregexp, q[</code></p>];

while ($v->has_regexp_node) {
  my ($g, $index) = $v->next_graph;

  print "<section><h2>Regexp #$index</h2>\n\n";
  print $g->as_svg;
  print "</section>\n";
}

print q[</body></html>];

1	#!/usr/bin/perl
2	use strict;
3	use warnings;
4	use feature 'state';
5	use CGI::Carp qw(fatalsToBrowser);
6
7	use FindBin;
8	use lib qq[$FindBin::Bin/../lib];
9	use lib q[/home/wakaba/work/manakai2/lib];
10	use Message::CGI::Util qw/percent_decode htescape/;
11	use Message::CGI::HTTP;
12
13	use Regexp::Parser::Perl58;
14
15	my $cgi = Message::CGI::HTTP->new;
16
17	my $regexp = percent_decode $cgi->get_parameter ('s') // '';
18	$regexp = '(?:)' unless length $regexp;
19
20	my $parser = Regexp::Parser::Perl58->new;
21
22	eval {
23	$parser->parse ($regexp);
24	};
25	my $eregexp = htescape $regexp;
26
27	if ($parser->errnum) {
28	binmode STDOUT, ':encoding(utf-8)';
29	print "Content-Type: text/html; charset=utf-8\n\n";
30	print q[<!DOCTYPE HTML><html lang=en>
31	<title>Regular expression visualizer: $eregexp</title>
32	<link rel="stylesheet" href="/www/style/html/xhtml"/>
33	</head>
34	<body>
35	<h1>Regular expression visualizer</h1>
36
37	<p>Input: <code>], $eregexp, q[</code></p>
38
39	<p>Error: ], htescape ($parser->errmsg);
40	exit;
41	}
42
43	require Regexp::Visualize::Simple;
44	my $v = Regexp::Visualize::Simple->new;
45	$v->push_regexp_node ($parser->root);
46
47	binmode STDOUT, ':encoding(utf-8)';
48	print "Content-Type: application/xhtml+xml; charset=utf-8\n\n";
49
50	print q[<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
51	<head><title>Regular expression visualizer: $eregexp</title>
52	<link rel="stylesheet" href="/www/style/html/xhtml"/>
53	</head>
54	<body>
55	<h1>Regular expression visualizer</h1>
56
57	<p>Input: <code>], $eregexp, q[</code></p>];
58
59	while ($v->has_regexp_node) {
60	my ($g, $index) = $v->next_graph;
61
62	print "<section><h2>Regexp #$index</h2>\n\n";
63	print $g->as_svg;
64	print "</section>\n";
65	}
66
67	print q[</body></html>];
68