Pod::ParseUtils - helpers for POD parsing and conversion
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Pod::ParseUtils - helpers for POD parsing and conversion
use Pod::ParseUtils;
my $list = new Pod::List;
my $link = Pod::Hyperlink->new('Pod::Parser');
Pod::ParseUtils contains a few object-oriented helper packages for
POD parsing and processing (i.e. in POD formatters and translators).
Pod::List can be used to hold information about POD lists
(written as =over ... =item ... =back) for further processing.
The following methods are available:
- Pod::List->
new()
-
Create a new list object. Properties may be specified through a hash
reference like this:
-
my $list = Pod::List->new({ -start => $., -indent => 4 });
-
See the individual methods/properties for details.
- $list->
file()
-
Without argument, retrieves the file name the list is in. This must
have been set before by either specifying -file in the new()
method or by calling the file() method with a scalar argument.
- $list->
start()
-
Without argument, retrieves the line number where the list started.
This must have been set before by either specifying -start in the
new() method or by calling the start() method with a scalar
argument.
- $list->
indent()
-
Without argument, retrieves the indent level of the list as specified
in
=over n
. This must have been set before by either specifying
-indent in the new() method or by calling the indent() method
with a scalar argument.
- $list->
type()
-
Without argument, retrieves the list type, which can be an arbitrary value,
e.g.
OL
, UL
, ... when thinking the HTML way.
This must have been set before by either specifying
-type in the new() method or by calling the type() method
with a scalar argument.
- $list->
rx()
-
Without argument, retrieves a regular expression for simplifying the
individual item strings once the list type has been determined. Usage:
E.g. when converting to HTML, one might strip the leading number in
an ordered list as
<OL>
already prints numbers itself.
This must have been set before by either specifying
-rx in the new() method or by calling the rx() method
with a scalar argument.
- $list->
item()
-
Without argument, retrieves the array of the items in this list.
The items may be represented by any scalar.
If an argument has been given, it is pushed on the list of items.
- $list->
parent()
-
Without argument, retrieves information about the parent holding this
list, which is represented as an arbitrary scalar.
This must have been set before by either specifying
-parent in the new() method or by calling the parent() method
with a scalar argument.
- $list->
tag()
-
Without argument, retrieves information about the list tag, which can be
any scalar.
This must have been set before by either specifying
-tag in the new() method or by calling the tag() method
with a scalar argument.
Pod::Hyperlink is a class for manipulation of POD hyperlinks. Usage:
my $link = Pod::Hyperlink->new('alternative text|page/"section in page"');
The Pod::Hyperlink class is mainly designed to parse the contents of the
L<...>
sequence, providing a simple interface for accessing the
different parts of a POD hyperlink for further processing. It can also be
used to construct hyperlinks.
- Pod::Hyperlink->
new()
-
The new() method can either be passed a set of key/value pairs or a single
scalar value, namely the contents of a
L<...>
sequence. An object
of the class Pod::Hyperlink
is returned. The value undef
indicates a
failure, the error message is stored in $@
.
- $link->
parse($string)
-
This method can be used to (re)parse a (new) hyperlink, i.e. the contents
of a
L<...>
sequence. The result is stored in the current object.
Warnings are stored in the warnings property.
E.g. sections like L<open(2)>
are deprecated, as they do not point
to Perl documents. L<DBI::foo(3p)>
is wrong as well, the manpage
section can simply be dropped.
- $link->
markup($string)
-
Set/retrieve the textual value of the link. This string contains special
markers
P<>
and Q<>
that should be expanded by the
translator's interior sequence expansion engine to the
formatter-specific code to highlight/activate the hyperlink. The details
have to be implemented in the translator.
- $link->
text()
-
This method returns the textual representation of the hyperlink as above,
but without markers (read only). Depending on the link type this is one of
the following alternatives (the + and * denote the portions of the text
that are marked up):
-
the +perl+ manpage
the *$|* entry in the +perlvar+ manpage
the section on *OPTIONS* in the +perldoc+ manpage
the section on *DESCRIPTION* elsewhere in this document
- $link->
warning()
-
After parsing, this method returns any warnings encountered during the
parsing process.
- $link->
file()
- $link->
line()
-
Just simple slots for storing information about the line and the file
the link was encountered in. Has to be filled in manually.
- $link->
page()
-
This method sets or returns the POD page this link points to.
- $link->
node()
-
As above, but the destination node text of the link.
- $link->
alttext()
-
Sets or returns an alternative text specified in the link.
- $link->
type()
-
The node type, either
section
or item
. As an unofficial type,
there is also hyperlink
, derived from e.g. L<http://perl.com>
- $link->
link()
-
Returns the link as contents of
L<>
. Reciprocal to parse().
Pod::Cache holds information about a set of POD documents,
especially the nodes for hyperlinks.
The following methods are available:
- Pod::Cache->
new()
-
Create a new cache object. This object can hold an arbitrary number of
POD documents of class Pod::Cache::Item.
- $cache->
item()
-
Add a new item to the cache. Without arguments, this method returns a
list of all cache elements.
- $cache->
find_page($name)
-
Look for a POD document named
$name
in the cache. Returns the
reference to the corresponding Pod::Cache::Item object or undef if
not found.
Pod::Cache::Item holds information about individual POD documents,
that can be grouped in a Pod::Cache object.
It is intended to hold information about the hyperlink nodes of POD
documents.
The following methods are available:
- Pod::Cache::Item->
new()
-
Create a new object.
- $cacheitem->
page()
-
Set/retrieve the POD document name (e.g. ``Pod::Parser'').
- $cacheitem->
description()
-
Set/retrieve the POD short description as found in the
=head1 NAME
section.
- $cacheitem->
path()
-
Set/retrieve the POD file storage path.
- $cacheitem->
file()
-
Set/retrieve the POD file name.
- $cacheitem->
nodes()
-
Add a node (or a list of nodes) to the document's node list. Note that
the order is kept, i.e. start with the first node and end with the last.
If no argument is given, the current list of nodes is returned in the
same order the nodes have been added.
A node can be any scalar, but usually is a pair of node string and
unique id for the
find_node
method to work correctly.
- $cacheitem->
find_node($name)
-
Look for a node or index entry named
$name
in the object.
Returns the unique id of the node (i.e. the second element of the array
stored in the node arry) or undef if not found.
- $cacheitem->
idx()
-
Add an index entry (or a list of them) to the document's index list. Note that
the order is kept, i.e. start with the first node and end with the last.
If no argument is given, the current list of index entries is returned in the
same order the entries have been added.
An index entry can be any scalar, but usually is a pair of string and
unique id.
Marek Rouchal <marek@saftsack.fs.uni-bayreuth.de>, borrowing
a lot of things from pod2man and pod2roff as well as other POD
processing tools by Tom Christiansen, Brad Appleton and Russ Allbery.
pod2man, pod2roff, the Pod::Parser manpage, the Pod::Checker manpage,
pod2html
Pod::ParseUtils - helpers for POD parsing and conversion
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