1Pod::Simple::XHTML(3) User Contributed Perl DocumentationPod::Simple::XHTML(3)
2
6 Pod::Simple::XHTML -- format Pod as validating XHTML
7
9 use Pod::Simple::XHTML;
10 my $parser = Pod::Simple::XHTML->new();
12 ...
14 $parser->parse_file('path/to/file.pod');
16
18 This class is a formatter that takes Pod and renders it as XHTML
19 validating HTML.
20 This is a subclass of Pod::Simple::Methody and inherits all its
22 methods. The implementation is entirely different than
23 Pod::Simple::HTML, but it largely preserves the same interface.
24 Minimal code
26 use Pod::Simple::XHTML;
27 my $psx = Pod::Simple::XHTML->new;
28 $psx->output_string(\my $html);
29 $psx->parse_file('path/to/Module/Name.pm');
30 open my $out, '>', 'out.html' or die "Cannot open 'out.html': $!\n";
31 print $out $html;
32 You can also control the character encoding and entities. For example,
34 if you're sure that the POD is properly encoded (using the "=encoding"
35 command), you can prevent high-bit characters from being encoded as
36 HTML entities and declare the output character set as UTF-8 before
37 parsing, like so:
38 $psx->html_charset('UTF-8');
40 $psx->html_encode_chars(q{&<>'"});
41
43 Pod::Simple::XHTML offers a number of methods that modify the format of
44 the HTML output. Call these after creating the parser object, but
45 before the call to "parse_file":
46 my $parser = Pod::PseudoPod::HTML->new();
48 $parser->set_optional_param("value");
49 $parser->parse_file($file);
50 perldoc_url_prefix
52 In turning Foo::Bar into http://whatever/Foo%3a%3aBar, what to put
53 before the "Foo%3a%3aBar". The default value is
54 "https://metacpan.org/pod/".
55 perldoc_url_postfix
57 What to put after "Foo%3a%3aBar" in the URL. This option is not set by
58 default.
59 man_url_prefix
61 In turning crontab(5) into http://whatever/man/1/crontab, what to put
62 before the "1/crontab". The default value is "http://man.he.net/man".
63 man_url_postfix
65 What to put after "1/crontab" in the URL. This option is not set by
66 default.
67 title_prefix, title_postfix
69 What to put before and after the title in the head. The values should
70 already be &-escaped.
71 html_css
73 $parser->html_css('path/to/style.css');
74 The URL or relative path of a CSS file to include. This option is not
76 set by default.
77 html_javascript
79 The URL or relative path of a JavaScript file to pull in. This option
80 is not set by default.
81 html_doctype
83 A document type tag for the file. This option is not set by default.
84 html_charset
86 The character set to declare in the Content-Type meta tag created by
87 default for "html_header_tags". Note that this option will be ignored
88 if the value of "html_header_tags" is changed. Defaults to
89 "ISO-8859-1".
90 html_header_tags
92 Additional arbitrary HTML tags for the header of the document. The
93 default value is just a content type header tag:
94 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
96 Add additional meta tags here, or blocks of inline CSS or JavaScript
98 (wrapped in the appropriate tags).
99 html_encode_chars
101 A string containing all characters that should be encoded as HTML
103 entities, specified using the regular expression character class syntax
104 (what you find within brackets in regular expressions). This value will
105 be passed as the second argument to the "encode_entities" function of
106 HTML::Entities. If HTML::Entities is not installed, then any characters
107 other than "&<""'> will be encoded numerically.
108 html_h_level
110 This is the level of HTML "Hn" element to which a Pod "head1"
111 corresponds. For example, if "html_h_level" is set to 2, a head1 will
112 produce an H2, a head2 will produce an H3, and so on.
113 default_title
115 Set a default title for the page if no title can be determined from the
116 content. The value of this string should already be &-escaped.
117 force_title
119 Force a title for the page (don't try to determine it from the
120 content). The value of this string should already be &-escaped.
121 html_header, html_footer
123 Set the HTML output at the beginning and end of each file. The default
124 header includes a title, a doctype tag (if "html_doctype" is set), a
125 content tag (customized by "html_header_tags"), a tag for a CSS file
126 (if "html_css" is set), and a tag for a Javascript file (if
127 "html_javascript" is set). The default footer simply closes the "html"
128 and "body" tags.
129 The options listed above customize parts of the default header, but
131 setting "html_header" or "html_footer" completely overrides the built-
132 in header or footer. These may be useful if you want to use template
133 tags instead of literal HTML headers and footers or are integrating
134 converted POD pages in a larger website.
135 If you want no headers or footers output in the HTML, set these options
137 to the empty string.
138 index
140 Whether to add a table-of-contents at the top of each page (called an
141 index for the sake of tradition).
142 anchor_items
144 Whether to anchor every definition "=item" directive. This needs to be
145 enabled if you want to be able to link to specific "=item" directives,
146 which are output as "<dt>" elements. Disabled by default.
147 backlink
149 Whether to turn every =head1 directive into a link pointing to the top
150 of the page (specifically, the opening body tag).
151
153 If the standard options aren't enough, you may want to subclass
154 Pod::Simple::XHMTL. These are the most likely candidates for methods
155 you'll want to override when subclassing.
156 handle_text
158 This method handles the body of text within any element: it's the body
159 of a paragraph, or everything between a "=begin" tag and the
160 corresponding "=end" tag, or the text within an L entity, etc. You
161 would want to override this if you are adding a custom element type
162 that does more than just display formatted text. Perhaps adding a way
163 to generate HTML tables from an extended version of POD.
164 So, let's say you want to add a custom element called 'foo'. In your
166 subclass's "new" method, after calling "SUPER::new" you'd call:
167 $new->accept_targets_as_text( 'foo' );
169 Then override the "start_for" method in the subclass to check for when
171 "$flags->{'target'}" is equal to 'foo' and set a flag that marks that
172 you're in a foo block (maybe "$self->{'in_foo'} = 1"). Then override
173 the "handle_text" method to check for the flag, and pass $text to your
174 custom subroutine to construct the HTML output for 'foo' elements,
175 something like:
176 sub handle_text {
178 my ($self, $text) = @_;
179 if ($self->{'in_foo'}) {
180 $self->{'scratch'} .= build_foo_html($text);
181 return;
182 }
183 $self->SUPER::handle_text($text);
184 }
185 handle_code
187 This method handles the body of text that is marked up to be code. You
188 might for instance override this to plug in a syntax highlighter. The
189 base implementation just escapes the text.
190 The callback methods "start_code" and "end_code" emits the "code" tags
192 before and after "handle_code" is invoked, so you might want to
193 override these together with "handle_code" if this wrapping isn't
194 suitable.
195 Note that the code might be broken into multiple segments if there are
197 nested formatting codes inside a "C<...>" sequence. In between the
198 calls to "handle_code" other markup tags might have been emitted in
199 that case. The same is true for verbatim sections if the
200 "codes_in_verbatim" option is turned on.
201 accept_targets_as_html
203 This method behaves like "accept_targets_as_text", but also marks the
204 region as one whose content should be emitted literally, without HTML
205 entity escaping or wrapping in a "div" element.
206 resolve_pod_page_link
208 my $url = $pod->resolve_pod_page_link('Net::Ping', 'INSTALL');
209 my $url = $pod->resolve_pod_page_link('perlpodspec');
210 my $url = $pod->resolve_pod_page_link(undef, 'SYNOPSIS');
211 Resolves a POD link target (typically a module or POD file name) and
213 section name to a URL. The resulting link will be returned for the
214 above examples as:
215 https://metacpan.org/pod/Net::Ping#INSTALL
217 https://metacpan.org/pod/perlpodspec
218 #SYNOPSIS
219 Note that when there is only a section argument the URL will simply be
221 a link to a section in the current document.
222 resolve_man_page_link
224 my $url = $pod->resolve_man_page_link('crontab(5)', 'EXAMPLE CRON FILE');
225 my $url = $pod->resolve_man_page_link('crontab');
226 Resolves a man page link target and numeric section to a URL. The
228 resulting link will be returned for the above examples as:
229 http://man.he.net/man5/crontab
231 http://man.he.net/man1/crontab
232 Note that the first argument is required. The section number will be
234 parsed from it, and if it's missing will default to 1. The second
235 argument is currently ignored, as man.he.net <http://man.he.net> does
236 not currently include linkable IDs or anchor names in its pages.
237 Subclass to link to a different man page HTTP server.
238 idify
240 my $id = $pod->idify($text);
241 my $hash = $pod->idify($text, 1);
242 This method turns an arbitrary string into a valid XHTML ID attribute
244 value. The rules enforced, following
245 <http://webdesign.about.com/od/htmltags/a/aa031707.htm>, are:
246 · The id must start with a letter (a-z or A-Z)
248 · All subsequent characters can be letters, numbers (0-9), hyphens
250 (-), underscores (_), colons (:), and periods (.).
251 · The final character can't be a hyphen, colon, or period. URLs
253 ending with these characters, while allowed by XHTML, can be
254 awkward to extract from plain text.
255 · Each id must be unique within the document.
257 In addition, the returned value will be unique within the context of
259 the Pod::Simple::XHTML object unless a second argument is passed a true
260 value. ID attributes should always be unique within a single XHTML
261 document, but pass the true value if you are creating not an ID but a
262 URL hash to point to an ID (i.e., if you need to put the "#foo" in "<a
263 href="#foo">foo</a>".
264 batch_mode_page_object_init
266 $pod->batch_mode_page_object_init($batchconvobj, $module, $infile, $outfile, $depth);
267 Called by Pod::Simple::HTMLBatch so that the class has a chance to
269 initialize the converter. Internally it sets the "batch_mode" property
270 to true and sets "batch_mode_current_level()", but Pod::Simple::XHTML
271 does not currently use those features. Subclasses might, though.
272
274 Pod::Simple, Pod::Simple::Text, Pod::Spell
275
277 Questions or discussion about POD and Pod::Simple should be sent to the
278 pod-people@perl.org mail list. Send an empty email to
279 pod-people-subscribe@perl.org to subscribe.
280 This module is managed in an open GitHub repository,
282 <https://github.com/perl-pod/pod-simple/>. Feel free to fork and
283 contribute, or to clone <git://github.com/perl-pod/pod-simple.git> and
284 send patches!
285 Patches against Pod::Simple are welcome. Please send bug reports to
287 <bug-pod-simple@rt.cpan.org>.
288
290 Copyright (c) 2003-2005 Allison Randal.
291 This library is free software; you can redistribute it and/or modify it
293 under the same terms as Perl itself.
294 This program is distributed in the hope that it will be useful, but
296 without any warranty; without even the implied warranty of
297 merchantability or fitness for a particular purpose.
298
300 Thanks to Hurricane Electric <http://he.net/> for permission to use its
301 Linux man pages online <http://man.he.net/> site for man page links.
302 Thanks to search.cpan.org <http://search.cpan.org/> for permission to
304 use the site for Perl module links.
305
307 Pod::Simpele::XHTML was created by Allison Randal <allison@perl.org>.
308 Pod::Simple was created by Sean M. Burke <sburke@cpan.org>. But don't
310 bother him, he's retired.
311 Pod::Simple is maintained by:
313 · Allison Randal "allison@perl.org"
315 · Hans Dieter Pearcey "hdp@cpan.org"
317 · David E. Wheeler "dwheeler@cpan.org"
319perl v5.30.0 2019-07-26 Pod::Simple::XHTML(3)