regexp/visualizer/regexp.cgi

#!/usr/bin/perl
use strict;
use warnings;
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/htescape/;
use Encode;

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

my $regexp = decode 'utf-8', $cgi->get_parameter ('s') // '';
$regexp = '(?:)' unless length $regexp;
my $eregexp = htescape $regexp;

my $lang = $cgi->get_parameter ('l') // 'perl58';
my $class = $lang eq 'js'
    ? 'Regexp::Parser::JavaScript'
    : 'Regexp::Parser::Perl58';

use UNIVERSAL::require;
$class->use or die $@;
my $parser = $class->new;

my $footer = q[
  <footer>
  [<a href="input">Input</a>]
  [<a href="../doc/readme">Source</a>]
  </footer>
];

my @error;
$parser->onerror (sub {
  my %args = @_;
  my $r = '<li>';
  if ($args{level} eq 'w') {
    $r .= '<strong>Warning</strong>: ';
  } else {
    $r .= '<strong>Error</strong>: ';
  }

  $r .= htescape sprintf $args{type}, @{$args{args}};

  $r .= ': <code>';
  $r .= htescape substr ${$args{valueref}}, 0, $args{pos_start};
  $r .= '<mark>';
  $r .= htescape substr ${$args{valueref}},
      $args{pos_start}, $args{pos_end} - $args{pos_start};
  $r .= '</mark>';
  $r .= htescape substr ${$args{valueref}}, $args{pos_end};
  $r .= '</code></li>';

  push @error, $r;
});

eval {
  $parser->parse ($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, q[</title>
<link rel="stylesheet" href="/www/style/html/xhtml">

<h1>Regular expression visualizer</h1>

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

<p>Error:
<ul>];
  print join '', @error;
  print q[</ul>];

  print $footer;

  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, q[</title>
<link rel="stylesheet" href="/www/style/html/xhtml"/>
</head>
<body>
<h1>Regular expression visualizer</h1>

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

if (@error) {
  print q[<ul>];
  print join '', @error;
  print q[</ul>];
}

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 $footer;

print q[</body></html>];
1	#!/usr/bin/perl
2	use strict;
3	use warnings;
4	use CGI::Carp qw(fatalsToBrowser);
5
6	use FindBin;
7	use lib qq[$FindBin::Bin/../lib];
8	use lib q[/home/wakaba/work/manakai2/lib];
9	use Message::CGI::Util qw/htescape/;
10	use Encode;
11
12	use Message::CGI::HTTP;
13	my $cgi = Message::CGI::HTTP->new;
14
15	my $regexp = decode 'utf-8', $cgi->get_parameter ('s') // '';
16	$regexp = '(?:)' unless length $regexp;
17	my $eregexp = htescape $regexp;
18
19	my $lang = $cgi->get_parameter ('l') // 'perl58';
20	my $class = $lang eq 'js'
21	? 'Regexp::Parser::JavaScript'
22	: 'Regexp::Parser::Perl58';
23
24	use UNIVERSAL::require;
25	$class->use or die $@;
26	my $parser = $class->new;
27
28	my $footer = q[
29	<footer>
30	[<a href="input">Input</a>]
31	[<a href="../doc/readme">Source</a>]
32	</footer>
33	];
34
35	my @error;
36	$parser->onerror (sub {
37	my %args = @_;
38	my $r = '<li>';
39	if ($args{level} eq 'w') {
40	$r .= '<strong>Warning</strong>: ';
41	} else {
42	$r .= '<strong>Error</strong>: ';
43	}
44
45	$r .= htescape sprintf $args{type}, @{$args{args}};
46
47	$r .= ': <code>';
48	$r .= htescape substr ${$args{valueref}}, 0, $args{pos_start};
49	$r .= '<mark>';
50	$r .= htescape substr ${$args{valueref}},
51	$args{pos_start}, $args{pos_end} - $args{pos_start};
52	$r .= '</mark>';
53	$r .= htescape substr ${$args{valueref}}, $args{pos_end};
54	$r .= '</code></li>';
55
56	push @error, $r;
57	});
58
59	eval {
60	$parser->parse ($regexp);
61	};
62
63	if ($parser->errnum) {
64	binmode STDOUT, ':encoding(utf-8)';
65	print "Content-Type: text/html; charset=utf-8\n\n";
66	print q[<!DOCTYPE HTML><html lang=en>
67	<title>Regular expression visualizer: ], $eregexp, q[</title>
68	<link rel="stylesheet" href="/www/style/html/xhtml">
69
70	<h1>Regular expression visualizer</h1>
71
72	<p>Input: <code>], $eregexp, q[</code></p>
73
74	<p>Error:
75	<ul>];
76	print join '', @error;
77	print q[</ul>];
78
79	print $footer;
80
81	exit;
82	}
83
84	require Regexp::Visualize::Simple;
85	my $v = Regexp::Visualize::Simple->new;
86	$v->push_regexp_node ($parser->root);
87
88	binmode STDOUT, ':encoding(utf-8)';
89	print "Content-Type: application/xhtml+xml; charset=utf-8\n\n";
90
91	print q[<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
92	<head><title>Regular expression visualizer: ], $eregexp, q[</title>
93	<link rel="stylesheet" href="/www/style/html/xhtml"/>
94	</head>
95	<body>
96	<h1>Regular expression visualizer</h1>
97
98	<p>Input: <code>], $eregexp, q[</code></p>];
99
100	if (@error) {
101	print q[<ul>];
102	print join '', @error;
103	print q[</ul>];
104	}
105
106	while ($v->has_regexp_node) {
107	my ($g, $index) = $v->next_graph;
108
109	print "<section><h2>Regexp #$index</h2>\n\n";
110	print $g->as_svg;
111	print "</section>\n";
112	}
113
114	print $footer;
115
116	print q[</body></html>];