html-webhacc/WebHACC/Output.pm

package WebHACC::Output;
use strict;

require IO::Handle;
use Scalar::Util qw/refaddr/;

my $htescape = sub ($) {
  my $s = $_[0];
  $s =~ s/&/&amp;/g;
  $s =~ s/</&lt;/g;
  $s =~ s/>/&gt;/g;
  $s =~ s/"/&quot;/g;
  $s =~ s{([\x00-\x09\x0B-\x1F\x7F-\xA0\x{FEFF}\x{FFFC}-\x{FFFF}])}{
    sprintf '<var>U+%04X</var>', ord $1;
  }ge;
  return $s;
};

sub new ($) {
  return bless {nav => [], section_rank => 1}, shift;
} # new

sub input ($;$) {
  if (@_ > 1) {
    if (defined $_[1]) {
      $_[0]->{input} = $_[1];
    } else {
      delete $_[0]->{input};
    }
  }
  
  return $_[0]->{input};
} # input

sub handle ($;$) {
  if (@_ > 1) {
    if (defined $_[1]) {
      $_[0]->{handle} = $_[1];
    } else {
      delete $_[0]->{handle};
    }
  }
  
  return $_[0]->{handle};
} # handle

sub set_utf8 ($) {
  binmode shift->{handle}, ':utf8';
} # set_utf8

sub set_flush ($) {
  shift->{handle}->autoflush (1);
} # set_flush

sub unset_flush ($) {
  shift->{handle}->autoflush (0);
} # unset_flush

sub html ($$) {
  shift->{handle}->print (shift);
} # html

sub text ($$) {
  shift->html ($htescape->(shift));
} # text

sub url ($$%) {
  my ($self, $url, %opt) = @_;
  $self->html (q[<code class=uri>&lt;]);
  $self->link ($url, %opt, url => $url);
  $self->html (q[></code>]);
} # url

sub start_tag ($$%) {
  my ($self, $tag_name, %opt) = @_;
  $self->html ('<' . $htescape->($tag_name)); # escape for safety
  if (exists $opt{id}) {
    my $id = $self->input->id_prefix . $opt{id};
    $self->html (' id="' . $htescape->($id) . '"');
    delete $opt{id};
  }
  for (keys %opt) {    # for safety
    $self->html (' ' . $htescape->($_) . '="' . $htescape->($opt{$_}) . '"');
  }
  $self->html ('>');
} # start_tag

sub end_tag ($$) {
  shift->html ('</' . $htescape->(shift) . '>');
} # end_tag

sub start_section ($%) {
  my ($self, %opt) = @_;

  if (defined $opt{role}) {
    if ($opt{role} eq 'parse-errors') {
      $opt{id} ||= 'parse-errors';
      $opt{title} ||= 'Parse Errors Section';
      $opt{short_title} ||= 'Parse Errors';
      delete $opt{role};
    } elsif ($opt{role} eq 'structure-errors') {
      $opt{id} ||= 'document-errors';
      $opt{title} ||= 'Structural Errors';
      $opt{short_title} ||= 'Struct. Errors';
      delete $opt{role};
    } elsif ($opt{role} eq 'reformatted') {
      $opt{id} ||= 'document-tree';
      $opt{title} ||= 'Reformatted Document Source';
      $opt{short_title} ||= 'Reformatted';
      delete $opt{role}
    } elsif ($opt{role} eq 'tree') {
      $opt{id} ||= 'document-tree';
      $opt{title} ||= 'Document Tree';
      $opt{short_title} ||= 'Tree';
      delete $opt{role};
    } elsif ($opt{role} eq 'structure') {
      $opt{id} ||= 'document-structure';
      $opt{title} ||= 'Document Structure';
      $opt{short_title} ||= 'Structure';
      delete $opt{role};
    }
  }

  $self->{section_rank}++;
  $self->html ('<div class=section');
  if (defined $opt{id}) {
    my $id = $self->input->id_prefix . $opt{id};
    $self->html (' id="' . $htescape->($id) . '"');
    push @{$self->{nav}},
        [$id => $opt{short_title} || $opt{title} => $opt{text}] 
        if $self->{section_rank} == 2;
  }
  my $section_rank = $self->{section_rank};
  $section_rank = 6 if $section_rank > 6;
  $self->html ('><h' . $section_rank . '>');
  $self->nl_text ($opt{title}, text => $opt{text});
  $self->html ('</h' . $section_rank . '>');
} # start_section

sub end_section ($) {
  my $self = shift;
  $self->html ('</div>');
  $self->{handle}->flush;
  $self->{section_rank}--;
} # end_section

sub start_error_list ($%) {
  my ($self, %opt) = @_;

  if (defined $opt{role}) {
    if ($opt{role} eq 'parse-errors') {
      $opt{id} ||= 'parse-errors-list';
      delete $opt{role};
    } elsif ($opt{role} eq 'structure-errors') {
      $opt{id} ||= 'document-errors-list';
      delete $opt{role};
    }
  }

  $self->start_tag ('dl', %opt);
} # start_error_list

sub end_error_list ($%) {
  my ($self, %opt) = @_;

  if (defined $opt{role}) {
    if ($opt{role} eq 'parse-errors') {
      delete $opt{role};
      $self->end_tag ('dl');
      ## NOTE: For parse error list, the |add_source_to_parse_error_list|
      ## method is invoked at the end of |generate_source_string_section|,
      ## since that generation method is invoked after the error list
      ## is generated.
    } elsif ($opt{role} eq 'structure-errors') {
      delete $opt{role};
      $self->end_tag ('dl');
      $self->add_source_to_parse_error_list ('document-errors-list');
    } else {
      $self->end_tag ('dl');
    }
  } else {
    $self->end_tag ('dl');
  }
} # end_error_list

sub add_source_to_parse_error_list ($$) {
  my $self = shift;

  $self->script (q[addSourceToParseErrorList ('] . $self->input->id_prefix .
                 q[', '] . shift . q[')]);
} # add_source_to_parse_error_list

sub start_code_block ($) {
  shift->html ('<pre><code>');
} # start_code_block

sub end_code_block ($) {
  shift->html ('</code></pre>');
} # end_code_block

sub code ($$;%) {
  my ($self, $content, %opt) = @_;
  $self->start_tag ('code', %opt);
  $self->text ($content);
  $self->html ('</code>');
} # code

sub script ($$;%) {
  my ($self, $content, %opt) = @_;
  $self->start_tag ('script', %opt);
  $self->html ($content);
  $self->html ('</script>');
} # script

sub dt ($$;%) {
  my ($self, $content, %opt) = @_;
  $self->start_tag ('dt', %opt);
  $self->nl_text ($content, text => $opt{text});
} # dt

sub link ($$%) {
  my ($self, $content, %opt) = @_;
  $self->start_tag ('a', %opt, href => $opt{url});
  $self->text ($content);
  $self->html ('</a>');
} # link

sub xref ($$%) {
  my ($self, $content, %opt) = @_;
  $self->html ('<a href="#' . $htescape->($self->input->id_prefix . $opt{target}) . '">');
  $self->nl_text ($content, text => $opt{text});
  $self->html ('</a>');
} # xref

sub link_to_webhacc ($$%) {
  my ($self, $content, %opt) = @_;
  $opt{url} = './?uri=' . $self->encode_url_component ($opt{url});
  $self->link ($content, %opt);
} # link_to_webhacc

my $get_node_path = sub ($) {
  my $node = shift;
  my @r;
  while (defined $node) {
    my $rs;
    if ($node->node_type == 1) {
      $rs = $node->node_name;
      $node = $node->parent_node;
    } elsif ($node->node_type == 2) {
      $rs = '@' . $node->node_name;
      $node = $node->owner_element;
    } elsif ($node->node_type == 3) {
      $rs = '"' . $node->data . '"';
      $node = $node->parent_node;
    } elsif ($node->node_type == 9) {
      @r = ('') unless @r;
      $rs = '';
      $node = $node->parent_node;
    } else {
      $rs = '#' . $node->node_type;
      $node = $node->parent_node;
    }
    unshift @r, $rs;
  }
  return join '/', @r;
}; # $get_node_path

sub node_link ($$) {
  my ($self, $node) = @_;
  $self->xref ($get_node_path->($node), target => 'node-' . refaddr $node);
} # node_link

{
  my $Msg = {};

sub load_text_catalog ($$) {
  my $self = shift;

  my $lang = shift; # MUST be a canonical lang name
  my $file_name = qq[cc-msg.$lang.txt];
  $lang = 'en' unless -f $file_name;
  $self->{primary_language} = $lang;
  
  open my $file, '<:utf8', $file_name or die "$0: $file_name: $!";
  while (<$file>) {
    if (s/^([^;]+);([^;]*);//) {
      my ($type, $cls, $msg) = ($1, $2, $_);
      $msg =~ tr/\x0D\x0A//d;
      $Msg->{$type} = [$cls, $msg];
    }
  }
} # load_text_catalog

sub nl_text ($$;%) {
  my ($self, $type, %opt) = @_;
  my $node = $opt{node};

  my @arg;
  {
    if (defined $Msg->{$type}) {
      my $msg = $Msg->{$type}->[1];
      if ($msg =~ /<var>/) {
        $msg =~ s{<var>\$([0-9]+)</var>}{
          defined $arg[$1] ? $htescape->($arg[$1]) : '(undef)';
        }ge;
        $msg =~ s{<var>{\@([A-Za-z0-9:_.-]+)}</var>}{
          UNIVERSAL::can ($node, 'get_attribute_ns')
              ? $htescape->($node->get_attribute_ns (undef, $1)) : ''
        }ge;
        $msg =~ s{<var>{\@}</var>}{
          UNIVERSAL::can ($node, 'value') ? $htescape->($node->value) : ''
        }ge;
        $msg =~ s{<var>{text}</var>}{
          defined $opt{text} ? $htescape->($opt{text}) : ''
        }ge;
        $msg =~ s{<var>{local-name}</var>}{
          UNIVERSAL::can ($node, 'manakai_local_name')
            ? $htescape->($node->manakai_local_name) : ''
        }ge;
        $msg =~ s{<var>{element-local-name}</var>}{
          (UNIVERSAL::can ($node, 'owner_element') and
           $node->owner_element)
            ? $htescape->($node->owner_element->manakai_local_name) : ''
        }ge;
      }
      $self->html ($msg);
      return;
    } elsif ($type =~ s/:([^:]*)$//) {
      unshift @arg, $1;
      redo;
    }
  }
  $self->text ($type);
} # nl_text

}

sub nav_list ($) {
  my $self = shift;
  $self->html (q[<ul class="navigation" id="nav-items">]);
  for (@{$self->{nav}}) {
    $self->html (qq[<li><a href="#@{[$htescape->($_->[0])]}">]);
    $self->nl_text ($_->[1], text => $_->[2]);
    $self->html ('</a>');
  }
  $self->html ('</ul>');
} # nav_list

sub http_header ($) {
  shift->html (qq[Content-Type: text/html; charset=utf-8\n\n]);
} # http_header

sub http_error ($$) {
  my $self = shift;
  my $code = 0+shift;
  my $text = {
    404 => 'Not Found',
  }->{$code};
  $self->html (qq[Status: $code $text\nContent-Type: text/html ; charset=us-ascii\n\n$code $text]);
} # http_error

sub html_header ($) {
  my $self = shift;
  $self->html (q[<!DOCTYPE html>]);
  $self->start_tag ('html', lang => $self->{primary_language});
  $self->html (q[<head><title>]);
  $self->nl_text (q[WebHACC:Title]);
  $self->html (q[</title>
<link rel="stylesheet" href="../cc-style.css" type="text/css">
</head>
<body>
<h1>]);
  $self->nl_text (q[WebHACC:Heading]);
  $self->html ('</h1>');
} # html_header

sub encode_url_component ($$) {
  shift;
  require Encode;
  my $s = Encode::encode ('utf8', shift);
  $s =~ s/([^0-9A-Za-z_.~-])/sprintf '%%%02X', ord $1/ge;
  return $s;
} # encode_url_component

1;
1	wakaba	1.1	package WebHACC::Output;
2			use strict;
3	wakaba	1.3
4	wakaba	1.1	require IO::Handle;
5	wakaba	1.3	use Scalar::Util qw/refaddr/;
6	wakaba	1.1
7			my $htescape = sub ($) {
8			my $s = $_[0];
9			$s =~ s/&/&/g;
10			$s =~ s/</</g;
11			$s =~ s/>/>/g;
12			$s =~ s/"/"/g;
13			$s =~ s{([\x00-\x09\x0B-\x1F\x7F-\xA0\x{FEFF}\x{FFFC}-\x{FFFF}])}{
14			sprintf '<var>U+%04X</var>', ord $1;
15			}ge;
16			return $s;
17			};
18
19			sub new ($) {
20	wakaba	1.4	return bless {nav => [], section_rank => 1}, shift;
21	wakaba	1.1	} # new
22
23			sub input ($;$) {
24			if (@_ > 1) {
25			if (defined $_[1]) {
26			$_[0]->{input} = $_[1];
27			} else {
28			delete $_[0]->{input};
29			}
30			}
31
32			return $_[0]->{input};
33			} # input
34
35			sub handle ($;$) {
36			if (@_ > 1) {
37			if (defined $_[1]) {
38			$_[0]->{handle} = $_[1];
39			} else {
40			delete $_[0]->{handle};
41			}
42			}
43
44			return $_[0]->{handle};
45			} # handle
46
47			sub set_utf8 ($) {
48			binmode shift->{handle}, ':utf8';
49			} # set_utf8
50
51			sub set_flush ($) {
52			shift->{handle}->autoflush (1);
53			} # set_flush
54
55			sub unset_flush ($) {
56			shift->{handle}->autoflush (0);
57			} # unset_flush
58
59			sub html ($$) {
60			shift->{handle}->print (shift);
61			} # html
62
63			sub text ($$) {
64			shift->html ($htescape->(shift));
65			} # text
66
67			sub url ($$%) {
68			my ($self, $url, %opt) = @_;
69			$self->html (q[<code class=uri><]);
70			$self->link ($url, %opt, url => $url);
71			$self->html (q[></code>]);
72			} # url
73
74			sub start_tag ($$%) {
75			my ($self, $tag_name, %opt) = @_;
76			$self->html ('<' . $htescape->($tag_name)); # escape for safety
77			if (exists $opt{id}) {
78			my $id = $self->input->id_prefix . $opt{id};
79			$self->html (' id="' . $htescape->($id) . '"');
80			delete $opt{id};
81			}
82			for (keys %opt) { # for safety
83			$self->html (' ' . $htescape->($_) . '="' . $htescape->($opt{$_}) . '"');
84			}
85			$self->html ('>');
86			} # start_tag
87
88			sub end_tag ($$) {
89			shift->html ('</' . $htescape->(shift) . '>');
90			} # end_tag
91
92			sub start_section ($%) {
93			my ($self, %opt) = @_;
94	wakaba	1.4
95			if (defined $opt{role}) {
96			if ($opt{role} eq 'parse-errors') {
97			$opt{id} \|\|= 'parse-errors';
98	wakaba	1.7	$opt{title} \|\|= 'Parse Errors Section';
99			$opt{short_title} \|\|= 'Parse Errors';
100	wakaba	1.4	delete $opt{role};
101			} elsif ($opt{role} eq 'structure-errors') {
102			$opt{id} \|\|= 'document-errors';
103			$opt{title} \|\|= 'Structural Errors';
104			$opt{short_title} \|\|= 'Struct. Errors';
105			delete $opt{role};
106			} elsif ($opt{role} eq 'reformatted') {
107			$opt{id} \|\|= 'document-tree';
108			$opt{title} \|\|= 'Reformatted Document Source';
109			$opt{short_title} \|\|= 'Reformatted';
110			delete $opt{role}
111			} elsif ($opt{role} eq 'tree') {
112			$opt{id} \|\|= 'document-tree';
113			$opt{title} \|\|= 'Document Tree';
114			$opt{short_title} \|\|= 'Tree';
115			delete $opt{role};
116			} elsif ($opt{role} eq 'structure') {
117			$opt{id} \|\|= 'document-structure';
118			$opt{title} \|\|= 'Document Structure';
119			$opt{short_title} \|\|= 'Structure';
120			delete $opt{role};
121			}
122			}
123
124			$self->{section_rank}++;
125	wakaba	1.1	$self->html ('<div class=section');
126			if (defined $opt{id}) {
127			my $id = $self->input->id_prefix . $opt{id};
128			$self->html (' id="' . $htescape->($id) . '"');
129	wakaba	1.7	push @{$self->{nav}},
130			[$id => $opt{short_title} \|\| $opt{title} => $opt{text}]
131	wakaba	1.4	if $self->{section_rank} == 2;
132	wakaba	1.1	}
133	wakaba	1.4	my $section_rank = $self->{section_rank};
134			$section_rank = 6 if $section_rank > 6;
135	wakaba	1.7	$self->html ('><h' . $section_rank . '>');
136			$self->nl_text ($opt{title}, text => $opt{text});
137			$self->html ('</h' . $section_rank . '>');
138	wakaba	1.1	} # start_section
139
140			sub end_section ($) {
141			my $self = shift;
142			$self->html ('</div>');
143			$self->{handle}->flush;
144	wakaba	1.4	$self->{section_rank}--;
145	wakaba	1.1	} # end_section
146	wakaba	1.4
147			sub start_error_list ($%) {
148			my ($self, %opt) = @_;
149
150			if (defined $opt{role}) {
151			if ($opt{role} eq 'parse-errors') {
152			$opt{id} \|\|= 'parse-errors-list';
153			delete $opt{role};
154			} elsif ($opt{role} eq 'structure-errors') {
155			$opt{id} \|\|= 'document-errors-list';
156			delete $opt{role};
157			}
158			}
159
160			$self->start_tag ('dl', %opt);
161			} # start_error_list
162
163			sub end_error_list ($%) {
164			my ($self, %opt) = @_;
165
166			if (defined $opt{role}) {
167			if ($opt{role} eq 'parse-errors') {
168			delete $opt{role};
169			$self->end_tag ('dl');
170			## NOTE: For parse error list, the \|add_source_to_parse_error_list\|
171			## method is invoked at the end of \|generate_source_string_section\|,
172			## since that generation method is invoked after the error list
173			## is generated.
174			} elsif ($opt{role} eq 'structure-errors') {
175			delete $opt{role};
176			$self->end_tag ('dl');
177			$self->add_source_to_parse_error_list ('document-errors-list');
178			} else {
179			$self->end_tag ('dl');
180			}
181			} else {
182			$self->end_tag ('dl');
183			}
184			} # end_error_list
185
186			sub add_source_to_parse_error_list ($$) {
187			my $self = shift;
188
189			$self->script (q[addSourceToParseErrorList ('] . $self->input->id_prefix .
190			q[', '] . shift . q[')]);
191			} # add_source_to_parse_error_list
192	wakaba	1.1
193			sub start_code_block ($) {
194			shift->html ('<pre><code>');
195			} # start_code_block
196
197			sub end_code_block ($) {
198			shift->html ('</code></pre>');
199			} # end_code_block
200
201	wakaba	1.3	sub code ($$;%) {
202			my ($self, $content, %opt) = @_;
203			$self->start_tag ('code', %opt);
204			$self->text ($content);
205			$self->html ('</code>');
206	wakaba	1.1	} # code
207
208	wakaba	1.3	sub script ($$;%) {
209			my ($self, $content, %opt) = @_;
210			$self->start_tag ('script', %opt);
211			$self->html ($content);
212			$self->html ('</script>');
213			} # script
214
215			sub dt ($$;%) {
216			my ($self, $content, %opt) = @_;
217			$self->start_tag ('dt', %opt);
218	wakaba	1.7	$self->nl_text ($content, text => $opt{text});
219	wakaba	1.3	} # dt
220
221	wakaba	1.1	sub link ($$%) {
222			my ($self, $content, %opt) = @_;
223	wakaba	1.2	$self->start_tag ('a', %opt, href => $opt{url});
224	wakaba	1.1	$self->text ($content);
225			$self->html ('</a>');
226			} # link
227
228			sub xref ($$%) {
229			my ($self, $content, %opt) = @_;
230			$self->html ('<a href="#' . $htescape->($self->input->id_prefix . $opt{target}) . '">');
231	wakaba	1.7	$self->nl_text ($content, text => $opt{text});
232	wakaba	1.1	$self->html ('</a>');
233			} # xref
234
235	wakaba	1.2	sub link_to_webhacc ($$%) {
236			my ($self, $content, %opt) = @_;
237			$opt{url} = './?uri=' . $self->encode_url_component ($opt{url});
238			$self->link ($content, %opt);
239			} # link_to_webhacc
240
241	wakaba	1.3	my $get_node_path = sub ($) {
242			my $node = shift;
243			my @r;
244			while (defined $node) {
245			my $rs;
246			if ($node->node_type == 1) {
247			$rs = $node->node_name;
248			$node = $node->parent_node;
249			} elsif ($node->node_type == 2) {
250			$rs = '@' . $node->node_name;
251			$node = $node->owner_element;
252			} elsif ($node->node_type == 3) {
253			$rs = '"' . $node->data . '"';
254			$node = $node->parent_node;
255			} elsif ($node->node_type == 9) {
256			@r = ('') unless @r;
257			$rs = '';
258			$node = $node->parent_node;
259			} else {
260			$rs = '#' . $node->node_type;
261			$node = $node->parent_node;
262			}
263			unshift @r, $rs;
264			}
265			return join '/', @r;
266			}; # $get_node_path
267
268			sub node_link ($$) {
269			my ($self, $node) = @_;
270			$self->xref ($get_node_path->($node), target => 'node-' . refaddr $node);
271			} # node_link
272
273	wakaba	1.7	{
274			my $Msg = {};
275
276			sub load_text_catalog ($$) {
277			my $self = shift;
278
279			my $lang = shift; # MUST be a canonical lang name
280			my $file_name = qq[cc-msg.$lang.txt];
281			$lang = 'en' unless -f $file_name;
282			$self->{primary_language} = $lang;
283
284			open my $file, '<:utf8', $file_name or die "$0: $file_name: $!";
285			while (<$file>) {
286			if (s/^([^;]+);([^;]*);//) {
287			my ($type, $cls, $msg) = ($1, $2, $_);
288			$msg =~ tr/\x0D\x0A//d;
289			$Msg->{$type} = [$cls, $msg];
290			}
291			}
292			} # load_text_catalog
293
294			sub nl_text ($$;%) {
295			my ($self, $type, %opt) = @_;
296			my $node = $opt{node};
297
298			my @arg;
299			{
300			if (defined $Msg->{$type}) {
301			my $msg = $Msg->{$type}->[1];
302			if ($msg =~ /<var>/) {
303			$msg =~ s{<var>\$([0-9]+)</var>}{
304			defined $arg[$1] ? $htescape->($arg[$1]) : '(undef)';
305			}ge;
306			$msg =~ s{<var>{\@([A-Za-z0-9:_.-]+)}</var>}{
307			UNIVERSAL::can ($node, 'get_attribute_ns')
308			? $htescape->($node->get_attribute_ns (undef, $1)) : ''
309			}ge;
310			$msg =~ s{<var>{\@}</var>}{
311			UNIVERSAL::can ($node, 'value') ? $htescape->($node->value) : ''
312			}ge;
313			$msg =~ s{<var>{text}</var>}{
314			defined $opt{text} ? $htescape->($opt{text}) : ''
315			}ge;
316			$msg =~ s{<var>{local-name}</var>}{
317			UNIVERSAL::can ($node, 'manakai_local_name')
318			? $htescape->($node->manakai_local_name) : ''
319			}ge;
320			$msg =~ s{<var>{element-local-name}</var>}{
321			(UNIVERSAL::can ($node, 'owner_element') and
322			$node->owner_element)
323			? $htescape->($node->owner_element->manakai_local_name) : ''
324			}ge;
325			}
326			$self->html ($msg);
327			return;
328			} elsif ($type =~ s/:([^:]*)$//) {
329			unshift @arg, $1;
330			redo;
331			}
332			}
333			$self->text ($type);
334			} # nl_text
335
336			}
337
338	wakaba	1.1	sub nav_list ($) {
339			my $self = shift;
340			$self->html (q[<ul class="navigation" id="nav-items">]);
341			for (@{$self->{nav}}) {
342	wakaba	1.7	$self->html (qq[<li><a href="#@{[$htescape->($_->[0])]}">]);
343			$self->nl_text ($_->[1], text => $_->[2]);
344			$self->html ('</a>');
345	wakaba	1.1	}
346			$self->html ('</ul>');
347			} # nav_list
348	wakaba	1.2
349	wakaba	1.5	sub http_header ($) {
350			shift->html (qq[Content-Type: text/html; charset=utf-8\n\n]);
351			} # http_header
352
353			sub http_error ($$) {
354			my $self = shift;
355			my $code = 0+shift;
356			my $text = {
357			404 => 'Not Found',
358			}->{$code};
359			$self->html (qq[Status: $code $text\nContent-Type: text/html ; charset=us-ascii\n\n$code $text]);
360			} # http_error
361
362			sub html_header ($) {
363			my $self = shift;
364	wakaba	1.7	$self->html (q[<!DOCTYPE html>]);
365			$self->start_tag ('html', lang => $self->{primary_language});
366			$self->html (q[<head><title>]);
367			$self->nl_text (q[WebHACC:Title]);
368			$self->html (q[</title>
369	wakaba	1.5	<link rel="stylesheet" href="../cc-style.css" type="text/css">
370			</head>
371			<body>
372	wakaba	1.7	<h1>]);
373			$self->nl_text (q[WebHACC:Heading]);
374			$self->html ('</h1>');
375	wakaba	1.5	} # html_header
376	wakaba	1.2
377			sub encode_url_component ($$) {
378			shift;
379			require Encode;
380			my $s = Encode::encode ('utf8', shift);
381			$s =~ s/([^0-9A-Za-z_.~-])/sprintf '%%%02X', ord $1/ge;
382			return $s;
383			} # encode_url_component
384	wakaba	1.1
385			1;