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	wakaba	1.1	#!/usr/bin/perl
2			use strict;
3			use warnings;
4			use CGI::Carp qw(fatalsToBrowser);
5
6	wakaba	1.3	use FindBin;
7			use lib qq[$FindBin::Bin/../lib];
8	wakaba	1.1	use lib q[/home/wakaba/work/manakai2/lib];
9	wakaba	1.4	use Message::CGI::Util qw/htescape/;
10			use Encode;
11
12	wakaba	1.2	use Message::CGI::HTTP;
13			my $cgi = Message::CGI::HTTP->new;
14
15	wakaba	1.4	my $regexp = decode 'utf-8', $cgi->get_parameter ('s') // '';
16	wakaba	1.1	$regexp = '(?:)' unless length $regexp;
17	wakaba	1.4	my $eregexp = htescape $regexp;
18	wakaba	1.1
19	wakaba	1.4	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	wakaba	1.1
28	wakaba	1.6	my $footer = q[
29			<footer>
30			[<a href="input">Input</a>]
31			[<a href="../doc/readme">Source</a>]
32			</footer>
33			];
34
35	wakaba	1.5	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	wakaba	1.3	eval {
60			$parser->parse ($regexp);
61			};
62	wakaba	1.2
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	wakaba	1.4	<title>Regular expression visualizer: ], $eregexp, q[</title>
68	wakaba	1.6	<link rel="stylesheet" href="/www/style/html/xhtml">
69
70	wakaba	1.2	<h1>Regular expression visualizer</h1>
71
72			<p>Input: <code>], $eregexp, q[</code></p>
73
74	wakaba	1.5	<p>Error:
75			<ul>];
76			print join '', @error;
77			print q[</ul>];
78
79	wakaba	1.6	print $footer;
80
81	wakaba	1.2	exit;
82			}
83	wakaba	1.1
84	wakaba	1.3	require Regexp::Visualize::Simple;
85			my $v = Regexp::Visualize::Simple->new;
86			$v->push_regexp_node ($parser->root);
87
88	wakaba	1.1	binmode STDOUT, ':encoding(utf-8)';
89			print "Content-Type: application/xhtml+xml; charset=utf-8\n\n";
90
91	wakaba	1.2	print q[<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
92	wakaba	1.4	<head><title>Regular expression visualizer: ], $eregexp, q[</title>
93	wakaba	1.2	<link rel="stylesheet" href="/www/style/html/xhtml"/>
94	wakaba	1.1	</head>
95	wakaba	1.2	<body>
96			<h1>Regular expression visualizer</h1>
97
98			<p>Input: <code>], $eregexp, q[</code></p>];
99	wakaba	1.5
100			if (@error) {
101			print q[<ul>];
102			print join '', @error;
103			print q[</ul>];
104			}
105	wakaba	1.1
106	wakaba	1.3	while ($v->has_regexp_node) {
107			my ($g, $index) = $v->next_graph;
108	wakaba	1.1
109	wakaba	1.2	print "<section><h2>Regexp #$index</h2>\n\n";
110	wakaba	1.1	print $g->as_svg;
111			print "</section>\n";
112			}
113
114	wakaba	1.6	print $footer;
115
116	wakaba	1.1	print q[</body></html>];