5 Pod::Simple::XHTML -- format Pod as validating XHTML
9 use Pod::Simple::XHTML;
11 my $parser = Pod::Simple::XHTML->new();
15 $parser->parse_file('path/to/file.pod');
19 This class is a formatter that takes Pod and renders it as XHTML
22 This is a subclass of L<Pod::Simple::Methody> and inherits all its
23 methods. The implementation is entirely different than
24 L<Pod::Simple::HTML>, but it largely preserves the same interface.
28 package Pod::Simple::XHTML;
30 use vars qw( $VERSION @ISA );
33 use Pod::Simple::Methody ();
34 @ISA = ('Pod::Simple::Methody');
36 use HTML::Entities 'encode_entities';
38 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
42 Pod::Simple::XHTML offers a number of methods that modify the format of
43 the HTML output. Call these after creating the parser object, but before
44 the call to C<parse_file>:
46 my $parser = Pod::PseudoPod::HTML->new();
47 $parser->set_optional_param("value");
48 $parser->parse_file($file);
50 =head2 perldoc_url_prefix
52 In turning L<Foo::Bar> into http://whatever/Foo%3a%3aBar, what
53 to put before the "Foo%3a%3aBar". The default value is
54 "http://search.cpan.org/perldoc?".
56 =head2 perldoc_url_postfix
58 What to put after "Foo%3a%3aBar" in the URL. This option is not set by
61 =head2 title_prefix, title_postfix
63 What to put before and after the title in the head. The values should
68 $parser->html_css('path/to/style.css');
70 The URL or relative path of a CSS file to include. This option is not
73 =head2 html_javascript
75 The URL or relative path of a JavaScript file to pull in. This option is
80 A document type tag for the file. This option is not set by default.
82 =head2 html_header_tags
84 Additional arbitrary HTML tags for the header of the document. The
85 default value is just a content type header tag:
87 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
89 Add additional meta tags here, or blocks of inline CSS or JavaScript
90 (wrapped in the appropriate tags).
94 Set a default title for the page if no title can be determined from the
95 content. The value of this string should already be &-escaped.
99 Force a title for the page (don't try to determine it from the content).
100 The value of this string should already be &-escaped.
102 =head2 html_header, html_footer
104 Set the HTML output at the beginning and end of each file. The default
105 header includes a title, a doctype tag (if C<html_doctype> is set), a
106 content tag (customized by C<html_header_tags>), a tag for a CSS file
107 (if C<html_css> is set), and a tag for a Javascript file (if
108 C<html_javascript> is set). The default footer simply closes the C<html>
111 The options listed above customize parts of the default header, but
112 setting C<html_header> or C<html_footer> completely overrides the
113 built-in header or footer. These may be useful if you want to use
114 template tags instead of literal HTML headers and footers or are
115 integrating converted POD pages in a larger website.
117 If you want no headers or footers output in the HTML, set these options
122 TODO -- Not implemented.
124 Whether to add a table-of-contents at the top of each page (called an
125 index for the sake of tradition).
130 __PACKAGE__->_accessorize(
131 'perldoc_url_prefix',
132 'perldoc_url_postfix',
133 'title_prefix', 'title_postfix',
138 'title', # Used internally for the title extracted from the content
144 'batch_mode', # whether we're in batch mode
145 'batch_mode_current_level',
146 # When in batch mode, how deep the current module is: 1 for "LWP",
147 # 2 for "LWP::Procotol", 3 for "LWP::Protocol::GHTTP", etc
150 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
154 If the standard options aren't enough, you may want to subclass
155 Pod::Simple::XHMTL. These are the most likely candidates for methods
156 you'll want to override when subclassing.
162 my $new = $self->SUPER::new(@_);
163 $new->{'output_fh'} ||= *STDOUT{IO};
164 $new->accept_targets( 'html', 'HTML' );
165 $new->perldoc_url_prefix('http://search.cpan.org/perldoc?');
166 $new->html_header_tags('<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">');
167 $new->nix_X_codes(1);
168 $new->codes_in_verbatim(1);
169 $new->{'scratch'} = '';
173 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
177 This method handles the body of text within any element: it's the body
178 of a paragraph, or everything between a "=begin" tag and the
179 corresponding "=end" tag, or the text within an L entity, etc. You would
180 want to override this if you are adding a custom element type that does
181 more than just display formatted text. Perhaps adding a way to generate
182 HTML tables from an extended version of POD.
184 So, let's say you want add a custom element called 'foo'. In your
185 subclass's C<new> method, after calling C<SUPER::new> you'd call:
187 $new->accept_targets_as_text( 'foo' );
189 Then override the C<start_for> method in the subclass to check for when
190 "$flags->{'target'}" is equal to 'foo' and set a flag that marks that
191 you're in a foo block (maybe "$self->{'in_foo'} = 1"). Then override the
192 C<handle_text> method to check for the flag, and pass $text to your
193 custom subroutine to construct the HTML output for 'foo' elements,
197 my ($self, $text) = @_;
198 if ($self->{'in_foo'}) {
199 $self->{'scratch'} .= build_foo_html($text);
201 $self->{'scratch'} .= $text;
208 # escape special characters in HTML (<, >, &, etc)
209 $_[0]{'scratch'} .= $_[0]{'in_verbatim'} ? encode_entities( $_[1] ) : $_[1]
212 sub start_Para { $_[0]{'scratch'} = '<p>' }
213 sub start_Verbatim { $_[0]{'scratch'} = '<pre><code>'; $_[0]{'in_verbatim'} = 1}
215 sub start_head1 { $_[0]{'scratch'} = '<h1>' }
216 sub start_head2 { $_[0]{'scratch'} = '<h2>' }
217 sub start_head3 { $_[0]{'scratch'} = '<h3>' }
218 sub start_head4 { $_[0]{'scratch'} = '<h4>' }
220 sub start_item_bullet { $_[0]{'scratch'} = '<li>' }
221 sub start_item_number { $_[0]{'scratch'} = "<li>$_[1]{'number'}. " }
222 sub start_item_text { $_[0]{'scratch'} = '<li>' }
224 sub start_over_bullet { $_[0]{'scratch'} = '<ul>'; $_[0]->emit }
225 sub start_over_text { $_[0]{'scratch'} = '<ul>'; $_[0]->emit }
226 sub start_over_block { $_[0]{'scratch'} = '<ul>'; $_[0]->emit }
227 sub start_over_number { $_[0]{'scratch'} = '<ol>'; $_[0]->emit }
229 sub end_over_bullet { $_[0]{'scratch'} .= '</ul>'; $_[0]->emit }
230 sub end_over_text { $_[0]{'scratch'} .= '</ul>'; $_[0]->emit }
231 sub end_over_block { $_[0]{'scratch'} .= '</ul>'; $_[0]->emit }
232 sub end_over_number { $_[0]{'scratch'} .= '</ol>'; $_[0]->emit }
234 # . . . . . Now the actual formatters:
236 sub end_Para { $_[0]{'scratch'} .= '</p>'; $_[0]->emit }
238 $_[0]{'scratch'} .= '</code></pre>';
239 $_[0]{'in_verbatim'} = 0;
243 sub end_head1 { $_[0]{'scratch'} .= '</h1>'; $_[0]->emit }
244 sub end_head2 { $_[0]{'scratch'} .= '</h2>'; $_[0]->emit }
245 sub end_head3 { $_[0]{'scratch'} .= '</h3>'; $_[0]->emit }
246 sub end_head4 { $_[0]{'scratch'} .= '</h4>'; $_[0]->emit }
248 sub end_item_bullet { $_[0]{'scratch'} .= '</li>'; $_[0]->emit }
249 sub end_item_number { $_[0]{'scratch'} .= '</li>'; $_[0]->emit }
250 sub end_item_text { $_[0]->emit }
252 # This handles =begin and =for blocks of all kinds.
254 my ($self, $flags) = @_;
255 $self->{'scratch'} .= '<div';
256 $self->{'scratch'} .= ' class="'.$flags->{'target'}.'"' if ($flags->{'target'});
257 $self->{'scratch'} .= '>';
263 $self->{'scratch'} .= '</div>';
269 if (defined $self->html_header) {
270 $self->{'scratch'} .= $self->html_header;
271 $self->emit unless $self->html_header eq "";
273 my ($doctype, $title, $metatags);
274 $doctype = $self->html_doctype || '';
275 $title = $self->force_title || $self->title || $self->default_title || '';
276 $metatags = $self->html_header_tags || '';
277 if ($self->html_css) {
278 $metatags .= "\n<link rel='stylesheet' href='" .
279 $self->html_css . "' type='text/css'>";
281 if ($self->html_javascript) {
282 $metatags .= "\n<script type='text/javascript' src='" .
283 $self->html_javascript . "'></script>";
285 $self->{'scratch'} .= <<"HTML";
289 <title>$title</title>
300 if (defined $self->html_footer) {
301 $self->{'scratch'} .= $self->html_footer;
302 $self->emit unless $self->html_footer eq "";
304 $self->{'scratch'} .= "</body>\n</html>";
310 sub start_B { $_[0]{'scratch'} .= '<b>' }
311 sub end_B { $_[0]{'scratch'} .= '</b>' }
313 sub start_C { $_[0]{'scratch'} .= '<code>' }
314 sub end_C { $_[0]{'scratch'} .= '</code>' }
316 sub start_E { $_[0]{'scratch'} .= '&' }
317 sub end_E { $_[0]{'scratch'} .= ';' }
319 sub start_F { $_[0]{'scratch'} .= '<i>' }
320 sub end_F { $_[0]{'scratch'} .= '</i>' }
322 sub start_I { $_[0]{'scratch'} .= '<i>' }
323 sub end_I { $_[0]{'scratch'} .= '</i>' }
326 my ($self, $flags) = @_;
328 if ($flags->{'type'} eq 'url') {
329 $url = $flags->{'to'};
330 } elsif ($flags->{'type'} eq 'pod') {
331 $url .= $self->perldoc_url_prefix || '';
332 $url .= $flags->{'to'} || '';
333 $url .= '/' . $flags->{'section'} if ($flags->{'section'});
334 $url .= $self->perldoc_url_postfix || '';
335 # require Data::Dumper;
336 # print STDERR Data::Dumper->Dump([$flags]);
339 $self->{'scratch'} .= '<a href="'. $url . '">';
341 sub end_L { $_[0]{'scratch'} .= '</a>' }
343 sub start_S { $_[0]{'scratch'} .= '<nobr>' }
344 sub end_S { $_[0]{'scratch'} .= '</nobr>' }
348 my $out = $self->{'scratch'} . "\n";
349 print {$self->{'output_fh'}} $out, "\n";
350 $self->{'scratch'} = '';
354 # Bypass built-in E<> handling to preserve entity encoding
363 L<Pod::Simple>, L<Pod::Simple::Methody>
367 Copyright (c) 2003-2005 Allison Randal.
369 This library is free software; you can redistribute it and/or modify
370 it under the same terms as Perl itself. The full text of the license
371 can be found in the LICENSE file included with this module.
373 This library is distributed in the hope that it will be useful, but
374 without any warranty; without even the implied warranty of
375 merchantability or fitness for a particular purpose.
379 Allison Randal <allison@perl.org>