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percona-toolkit/util/pod2rst-fixed.packed
Brian Fraser 5c30f5517e Fixes for the online docs
2013-03-20 13:14:37 -03:00

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#!/usr/bin/env perl
# This chunk of stuff was generated by App::FatPacker. To find the original
# file's code, look for the end of this BEGIN block or the string 'FATPACK'
BEGIN {
my %fatpacked;
$fatpacked{"Pod/POM.pm"} = <<'POD_POM';
#============================================================= -*-Perl-*-
#
# Pod::POM
#
# DESCRIPTION
# Parses POD from a file or text string and builds a tree structure,
# hereafter known as the POD Object Model (POM).
#
# AUTHOR
# Andy Wardley <abw@wardley.org>
#
# Andrew Ford <A.Ford@ford-mason.co.uk> (co-maintainer as of 03/2009)
#
# COPYRIGHT
# Copyright (C) 2000-2009 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: POM.pm 88 2010-04-02 13:37:41Z ford $
#
#========================================================================
package Pod::POM;
require 5.004;
use strict;
use Pod::POM::Constants qw( :all );
use Pod::POM::Nodes;
use Pod::POM::View::Pod;
use vars qw( $VERSION $DEBUG $ERROR $ROOT $TEXTSEQ $DEFAULT_VIEW );
use base qw( Exporter );
$VERSION = '0.27';
$DEBUG = 0 unless defined $DEBUG;
$ROOT = 'Pod::POM::Node::Pod'; # root node class
$TEXTSEQ = 'Pod::POM::Node::Sequence'; # text sequence class
$DEFAULT_VIEW = 'Pod::POM::View::Pod'; # default view class
#------------------------------------------------------------------------
# allow 'meta' to be specified as a load option to activate =meta tags
#------------------------------------------------------------------------
use vars qw( @EXPORT_FAIL @EXPORT_OK $ALLOW_META );
@EXPORT_OK = qw( meta );
@EXPORT_FAIL = qw( meta );
$ALLOW_META = 0;
sub export_fail {
my $class = shift;
my $meta = shift;
return ($meta, @_) unless $meta eq 'meta';
$ALLOW_META++;
return @_;
}
#------------------------------------------------------------------------
# new(\%options)
#------------------------------------------------------------------------
sub new {
my $class = shift;
my $config = ref $_[0] eq 'HASH' ? shift : { @_ };
bless {
CODE => $config->{ code } || 0,
WARN => $config->{ warn } || 0,
META => $config->{ meta } || $ALLOW_META,
WARNINGS => [ ],
FILENAME => '',
ERROR => '',
}, $class;
}
#------------------------------------------------------------------------
# parse($text_or_file)
#
# General purpose parse method which attempts to Do The Right Thing in
# calling parse_file() or parse_text() according to the argument
# passed. A hash reference can be specified that contains a 'text'
# or 'file' key and corresponding value. Otherwise, the argument can
# be a reference to an input handle which is passed off to parse_file().
# If the argument is a text string that contains '=' at the start of
# any line then it is treated as Pod text and passed to parse_text(),
# otherwise it is assumed to be a filename and passed to parse_file().
#------------------------------------------------------------------------
sub parse {
my ($self, $input) = @_;
my $result;
if (ref $input eq 'HASH') {
if ($input = $input->{ text }) {
$result = $self->parse_text($input, $input->{ name });
}
elsif ($input = $input->{ file }) {
$result = $self->parse_file($input);
}
else {
$result = $self->error("no 'text' or 'file' specified");
}
}
elsif (ref $input || $input !~ /^=/m) { # doesn't look like POD text
$result = $self->parse_file($input);
}
else { # looks like POD text
$result = $self->parse_text($input);
}
return $result;
}
#------------------------------------------------------------------------
# parse_file($filename_or_handle)
#
# Reads the content of a Pod file specified by name or file handle, and
# passes it to parse_text() for parsing.
#------------------------------------------------------------------------
sub parse_file {
my ($self, $file) = @_;
my ($text, $name);
if (ref $file) { # assume open filehandle
local $/ = undef;
$name = '<filehandle>';
$text = <$file>;
}
else { # a file which must be opened
local *FP;
local $/ = undef;
$name = ( $file eq '-' ? '<standard input>' : $file );
open(FP, $file) || return $self->error("$file: $!");
$text = <FP>;
close(FP);
}
$self->parse_text($text, $name);
}
#------------------------------------------------------------------------
# parse_text($text, $name)
#
# Main parser method. Scans the input text for Pod sections and splits
# them into paragraphs. Builds a tree of Pod::POM::Node::* objects
# to represent the Pod document in object model form.
#------------------------------------------------------------------------
sub parse_text {
my ($self, $text, $name) = @_;
my ($para, $paralen, $gap, $type, $line, $inpod, $code, $result, $verbatim);
my $warn = $self->{ WARNINGS } = [ ];
my @stack = ( );
my $item = $ROOT->new($self);
return $self->error($ROOT->error())
unless defined $item;
push(@stack, $item);
$name = '<input text>' unless defined $name;
$self->{ FILENAME } = $name;
$code = $self->{ CODE };
$line = \$self->{ LINE };
$$line = 1;
$inpod = 0;
my @encchunks = split /^(=encoding.*)/m, $text;
$text = shift @encchunks;
while (@encchunks) {
my($encline,$chunk) = splice @encchunks, 0, 2;
require Encode;
my($encoding) = $encline =~ /^=encoding\s+(\S+)/;
Encode::from_to($chunk, $encoding, "utf8");
Encode::_utf8_on($chunk);
# $text .= "xxx$encline";
$text .= $chunk;
}
# patch from JJ
# while ($text =~ /(?:(.*?)(\n{2,}))|(.+$)/sg) {
while ($text =~ /(?:(.*?)((?:\s*\n){2,}))|(.+$)/sg) {
($para, $gap) = defined $1 ? ($1, $2) : ($3, '');
if ($para =~ s/^==?(\w+)\s*//) {
$type = $1;
# switch on for =pod or any other =cmd, switch off for =cut
if ($type eq 'pod') { $inpod = 1; next }
elsif ($type eq 'cut') { $inpod = 0; next }
else { $inpod = 1 };
if ($type eq 'meta') {
$self->{ META }
? $stack[0]->metadata(split(/\s+/, $para, 2))
: $self->warning("metadata not allowed", $name, $$line);
next;
}
}
elsif (! $inpod) {
next unless $code;
$type = 'code';
$para .= $gap;
$gap = '';
}
elsif ($para =~ /^\s+/) {
$verbatim .= $para;
$verbatim .= $gap;
next;
}
else {
$type = 'text';
chomp($para); # catches last line in file
}
if ($verbatim) {
while(@stack) {
$verbatim =~ s/\s+$//s;
$result = $stack[-1]->add($self, 'verbatim', $verbatim);
if (! defined $result) {
$self->warning($stack[-1]->error(), $name, $$line);
undef $verbatim;
last;
}
elsif (ref $result) {
push(@stack, $result);
undef $verbatim;
last;
}
elsif ($result == REDUCE) {
pop @stack;
undef $verbatim;
last;
}
elsif ($result == REJECT) {
$self->warning($stack[-1]->error(), $name, $$line);
pop @stack;
}
elsif (@stack == 1) {
$self->warning("unexpected $type", $name, $$line);
undef $verbatim;
last;
}
else {
pop @stack;
}
}
}
while(@stack) {
$result = $stack[-1]->add($self, $type, $para);
if (! defined $result) {
$self->warning($stack[-1]->error(), $name, $$line);
last;
}
elsif (ref $result) {
push(@stack, $result);
last;
}
elsif ($result == REDUCE) {
pop @stack;
last;
}
elsif ($result == REJECT) {
$self->warning($stack[-1]->error(), $name, $$line);
pop @stack;
}
elsif (@stack == 1) {
$self->warning("unexpected $type", $name, $$line);
last;
}
else {
pop @stack;
}
}
}
continue {
$$line += ($para =~ tr/\n//);
$$line += ($gap =~ tr/\n//);
}
if ($verbatim) {
while(@stack) {
$verbatim =~ s/\s+$//s;
$result = $stack[-1]->add($self, 'verbatim', $verbatim);
if (! defined $result) {
$self->warning($stack[-1]->error(), $name, $$line);
undef $verbatim;
last;
}
elsif (ref $result) {
push(@stack, $result);
undef $verbatim;
last;
}
elsif ($result == REDUCE) {
pop @stack;
undef $verbatim;
last;
}
elsif ($result == REJECT) {
$self->warning($stack[-1]->error(), $name, $$line);
pop @stack;
}
elsif (@stack == 1) {
$self->warning("unexpected $type", $name, $$line);
undef $verbatim;
last;
}
else {
pop @stack;
}
}
}
return $stack[0];
}
#------------------------------------------------------------------------
# parse_sequence($text)
#
# Parse a text paragraph to identify internal sequences (e.g. B<foo>)
# which may be nested within each other. Returns a simple scalar (no
# embedded sequences) or a reference to a Pod::POM::Text object.
#------------------------------------------------------------------------
sub parse_sequence {
my ($self, $text) = @_;
my ($cmd, $lparen, $rparen, $plain);
my ($name, $line, $warn) = @$self{ qw( FILENAME LINE WARNINGS ) };
my @stack;
push(@stack, [ '', '', 'EOF', $name, $line, [ ] ] );
while ($text =~ /
(?: ([A-Z]) (< (?:<+\s)?) ) # open
| ( (?:\s>+)? > ) # or close
| (?: (.+?) # or text...
(?= # ...up to
(?: [A-Z]< ) # open
| (?: (?: \s>+)? > ) # or close
| $ # or EOF
)
)
/gxs) {
if (defined $1) {
($cmd, $lparen) = ($1, $2);
$lparen =~ s/\s$//;
($rparen = $lparen) =~ tr/</>/;
push(@stack, [ $cmd, $lparen, $rparen, $name, $line, [ ] ]);
}
elsif (defined $3) {
$rparen = $3;
$rparen =~ s/^\s+//;
if ($rparen eq $stack[-1]->[RPAREN]) {
$cmd = $TEXTSEQ->new(pop(@stack))
|| return $self->error($TEXTSEQ->error());
push(@{ $stack[-1]->[CONTENT] }, $cmd);
}
else {
$self->warning((scalar @stack > 1
? "expected '$stack[-1]->[RPAREN]' not '$rparen'"
: "spurious '$rparen'"), $name, $line);
push(@{ $stack[-1]->[CONTENT] }, $rparen);
}
}
elsif (defined $4) {
$plain = $4;
push(@{ $stack[-1]->[CONTENT] }, $plain);
$line += ($plain =~ tr/\n//);
}
else {
$self->warning("unexpected end of input", $name, $line);
last;
}
}
while (@stack > 1) {
$cmd = pop @stack;
$self->warning("unterminated '$cmd->[CMD]$cmd->[LPAREN]' starting",
$name, $cmd->[LINE]);
$cmd = $TEXTSEQ->new($cmd)
|| $self->error($TEXTSEQ->error());
push(@{ $stack[-1]->[CONTENT] }, $cmd);
}
return $TEXTSEQ->new(pop(@stack))
|| $self->error($TEXTSEQ->error());
}
#------------------------------------------------------------------------
# default_view($viewer)
#
# Accessor method to return or update the $DEFVIEW package variable,
# loading the module for any package name specified.
#------------------------------------------------------------------------
sub default_view {
my ($self, $viewer) = @_;
return $DEFAULT_VIEW unless $viewer;
unless (ref $viewer) {
my $file = $viewer;
$file =~ s[::][/]g;
$file .= '.pm';
eval { require $file };
return $self->error($@) if $@;
}
return ($DEFAULT_VIEW = $viewer);
}
#------------------------------------------------------------------------
# warning($msg, $file, $line)
#
# Appends a string of the form " at $file line $line" to $msg if
# $file is specified and then stores $msg in the internals
# WARNINGS list. If the WARN option is set then the warning is
# raised, either via warn(), or by dispatching to a subroutine
# when WARN is defined as such.
#------------------------------------------------------------------------
sub warning {
my ($self, $msg, $file, $line) = @_;
my $warn = $self->{ WARN };
$line = 'unknown' unless defined $line && length $line;
$msg .= " at $file line $line" if $file;
push(@{ $self->{ WARNINGS } }, $msg);
if (ref $warn eq 'CODE') {
&$warn($msg);
}
elsif ($warn) {
warn($msg, "\n");
}
}
#------------------------------------------------------------------------
# warnings()
#
# Returns a reference to the (possibly empty) list of warnings raised by
# the most recent call to any of the parse_XXX() methods
#------------------------------------------------------------------------
sub warnings {
my $self = shift;
return wantarray ? @{ $self->{ WARNINGS } } : $self->{ WARNINGS };
}
#------------------------------------------------------------------------
# error($msg)
#
# Sets the internal ERROR member and returns undef when called with an
# argument(s), returns the current value when called without.
#------------------------------------------------------------------------
sub error {
my $self = shift;
my $errvar;
{
no strict qw( refs );
if (ref $self) {
$errvar = \$self->{ ERROR };
}
else {
$errvar = \${"$self\::ERROR"};
}
}
if (@_) {
$$errvar = ref($_[0]) ? shift : join('', @_);
return undef;
}
else {
return $$errvar;
}
}
sub DEBUG {
print STDERR "DEBUG: ", @_ if $DEBUG;
}
1;
__END__
=head1 NAME
Pod::POM - POD Object Model
=head1 SYNOPSIS
use Pod::POM;
my $parser = Pod::POM->new(\%options);
# parse from a text string
my $pom = $parser->parse_text($text)
|| die $parser->error();
# parse from a file specified by name or filehandle
my $pom = $parser->parse_file($file)
|| die $parser->error();
# parse from text or file
my $pom = $parser->parse($text_or_file)
|| die $parser->error();
# examine any warnings raised
foreach my $warning ($parser->warnings()) {
warn $warning, "\n";
}
# print table of contents using each =head1 title
foreach my $head1 ($pom->head1()) {
print $head1->title(), "\n";
}
# print each section
foreach my $head1 ($pom->head1()) {
print $head1->title(), "\n";
print $head1->content();
}
# print the entire document as HTML
use Pod::POM::View::HTML;
print Pod::POM::View::HTML->print($pom);
# create custom view
package My::View;
use base qw( Pod::POM::View::HTML );
sub view_head1 {
my ($self, $item) = @_;
return '<h1>',
$item->title->present($self),
"</h1>\n",
$item->content->present($self);
}
package main;
print My::View->print($pom);
=head1 DESCRIPTION
This module implements a parser to convert Pod documents into a simple
object model form known hereafter as the Pod Object Model. The object
model is generated as a hierarchical tree of nodes, each of which
represents a different element of the original document. The tree can
be walked manually and the nodes examined, printed or otherwise
manipulated. In addition, Pod::POM supports and provides view objects
which can automatically traverse the tree, or section thereof, and
generate an output representation in one form or another.
Let's look at a typical Pod document by way of example.
=head1 NAME
My::Module - just another My::Module
=head1 DESCRIPTION
This is My::Module, a deeply funky piece of Perl code.
=head2 METHODS
My::Module implements the following methods
=over 4
=item new(\%config)
This is the constructor method. It accepts the following
configuration options:
=over 4
=item name
The name of the thingy.
=item colour
The colour of the thingy.
=back
=item print()
This prints the thingy.
=back
=head1 AUTHOR
My::Module was written by me E<lt>me@here.orgE<gt>
This document contains 3 main sections, NAME, DESCRIPTION and
AUTHOR, each of which is delimited by an opening C<=head1> tag.
NAME and AUTHOR each contain only a single line of text, but
DESCRIPTION is more interesting. It contains a line of text
followed by the C<=head2> subsection, METHODS. This contains
a line of text and a list extending from the C<=over 4> to the
final C<=back> just before the AUTHOR section starts. The list
contains 2 items, C<new(\%config)>, which itself contains some
text and a list of 2 items, and C<print()>.
Presented as plain text and using indentation to indicate the element
nesting, the model then looks something like this :
NAME
My::Module - just another My::Module
DESCRIPTION
This is My::Module, a deeply funky piece of Perl code.
METHODS
My::Module implements the following methods
* new(\%config)
This is the constructor method. It accepts the
following configuration options:
* name
The name of the thingy.
* colour
The colour of the thingy.
* item print()
This prints the thingy.
AUTHOR
My::Myodule was written by me <me@here.org>
Those of you familiar with XML may prefer to think of it in the
following way:
<pod>
<head1 title="NAME">
<p>My::Module - just another My::Module</p>
</head1>
<head1 title="DESCRIPTION">
<p>This is My::Module, a deeply funky piece of
Perl code.</p>
<head2 title="METHODS">
<p>My::Module implements the following methods</p>
<over indent=4>
<item title="item new(\%config)">
<p>This is the constructor method. It accepts
the following configuration options:</p>
<over indent=4>
<item title="name">
<p>The name of the thingy.</p>
</item>
<item title="colour">
<p>The colour of the thingy.</p>
</item>
</over>
</item>
<item title="print()">
<p>This prints the thingy.</p>
</item>
</over>
</head2>
</head1>
<head1 title="AUTHOR">
<p>My::Myodule was written by me &lt;me@here.org&gt;
</head1>
</pod>
Notice how we can make certain assumptions about various elements.
For example, we can assume that any C<=head1> section we find begins a
new section and implicitly ends any previous section. Similarly, we
can assume an C<=item> ends when the next one begins, and so on. In
terms of the XML example shown above, we are saying that we're smart
enough to add a C<E<lt>/head1E<gt>> element to terminate any
previously opened C<E<lt>head1E<gt>> when we find a new C<=head1> tag
in the input document.
However you like to visualise the content, it all comes down to the
same underlying model. The job of the Pod::POM module is to read an
input Pod document and build an object model to represent it in this
structured form.
Each node in the tree (i.e. element in the document) is represented
by a Pod::POM::Node::* object. These encapsulate the attributes for
an element (such as the title for a C<=head1> tag) and also act as
containers for further Pod::POM::Node::* objects representing the
content of the element. Right down at the leaf nodes, we have simple
object types to represent formatted and verbatim text paragraphs and
other basic elements like these.
=head2 Parsing Pod
The Pod::POM module implements the methods parse_file($file),
parse_text($text) and parse($file_or_text) to parse Pod files and
input text. They return a Pod::POM::Node::Pod object to represent the
root of the Pod Object Model, effectively the C<E<lt>podE<gt>> element
in the XML tree shown above.
use Pod::POM;
my $parser = Pod::POM->new();
my $pom = $parser->parse_file($filename)
|| die $parser->error();
The parse(), parse_text() and parse_file() methods return
undef on error. The error() method can be called to retrieve the
error message generated. Parsing a document may also generate
non-fatal warnings. These can be retrieved via the warnings() method
which returns a reference to a list when called in scalar context or a
list of warnings when called in list context.
foreach my $warn ($parser->warnings()) {
warn $warn, "\n";
}
Alternatively, the 'warn' configuration option can be set to have
warnings automatically raised via C<warn()> as they are encountered.
my $parser = Pod::POM->new( warn => 1 );
=head2 Walking the Object Model
Having parsed a document into an object model, we can then select
various items from it. Each node implements methods (via AUTOLOAD)
which correspond to the attributes and content elements permitted
within in.
So to fetch the list of '=head1' sections within our parsed document,
we would do the following:
my $sections = $pom->head1();
Methods like this will return a list of further Pod::POM::Node::*
objects when called in list context or a reference to a list when
called in scalar context. In the latter case, the list is blessed
into the Pod::POM::Node::Content class which gives it certain
magical properties (more on that later).
Given the list of Pod::POM::Node::Head1 objects returned by the above,
we can print the title attributes of each like this:
foreach my $s (@$sections) {
print $s->title();
}
Let's look at the second section, DESCRIPTION.
my $desc = $sections->[1];
We can print the title of each subsection within it:
foreach my $ss ($desc->head2()) {
print $ss->title();
}
Hopefully you're getting the idea by now, so here's a more studly
example to print the title for each item contained in the first list
within the METHODS section:
foreach my $item ($desc->head2->[0]->over->[0]->item) {
print $item->title(), "\n";
}
=head2 Element Content
This is all well and good if you know the precise structure of a
document in advance. For those more common cases when you don't,
each node that can contain other nodes provides a 'content' method
to return a complete list of all the other nodes that it contains.
The 'type' method can be called on any node to return its element
type (e.g. 'head1', 'head2', 'over', item', etc).
foreach my $item ($pom->content()) {
my $type = $item->type();
if ($type eq 'head1') {
...
}
elsif ($type eq 'head2') {
...
}
...
}
The content for an element is represented by a reference to a list,
blessed into the Pod::POM::Node::Content class. This provides some
magic in the form of an overloaded stringification operator which
will automatically print the contents of the list if you print
the object itself. In plain English, or rather, in plain Perl,
this means you can do things like the following:
foreach my $head1 ($pom->head1()) {
print '<h1>', $head1->title(), "</h1>\n\n";
print $head1->content();
}
# print all the root content
foreach my $item ($pom->content()) {
print $item;
}
# same as above
print $pom->content();
In fact, all Pod::POM::Node::* objects provide this same magic, and
will attempt to Do The Right Thing to present themselves in the
appropriate manner when printed. Thus, the following are all valid.
print $pom; # entire document
print $pom->content; # content of document
print $pom->head1->[0]; # just first section
print $pom->head1; # print all sections
foreach my $h1 ($pom->head1()) {
print $h1->head2(); # print all subsections
}
=head2 Output Views
To understand how the different elements go about presenting
themselves in "the appropriate manner", we must introduce the concept
of a view. A view is quite simply a particular way of looking at the
model. In real terms, we can think of a view as being some kind of
output type generated by a pod2whatever converter. Notionally we can
think in terms of reading in an input document, building a Pod Object
Model, and then generating an HTML view of the document, and/or a
LaTeX view, a plain text view, and so on.
A view is represented in this case by an object class which contains
methods for displaying each of the different element types that could
be encountered in any Pod document. There's a method for displaying
C<=head1> sections (view_head1()), another method for displaying
C<=head2> sections (view_head2()), one for C<=over> (view_over()),
another for C<=item> (view_item()) and so on.
If we happen to have a reference to a $node and we know it's a 'head1'
node, then we can directly call the right view method to have it
displayed properly:
$view = 'Pod::POM::View::HTML';
$view->view_head1($node);
Thus our earlier example can be modified to be I<slightly> less laborious
and I<marginally> more flexible.
foreach my $node ($pom->content) {
my $type = $node->type();
if ($type eq 'head1') {
print $view->view_head1($node);
}
elsif ($type eq 'head2') {
print $view->view_head2($node);
}
...
}
However, this is still far from ideal. To make life easier, each
Pod::POM::Node::* class inherits (or possibly redefines) a
C<present($view)> method from the Pod::POM::Node base class. This method
expects a reference to a view object passed as an argument, and it
simply calls the appropriate view_xxx() method on the view object,
passing itself back as an argument. In object parlance, this is known
as "double dispatch". The beauty of it is that you don't need to know
what kind of node you have to be able to print it. You simply pass
it a view object and leave it to work out the rest.
foreach my $node ($pom->content) {
print $node->present($view);
}
If $node is a Pod::POM::Node::Head1 object, then the view_head1($node)
method gets called against the $view object. Otherwise, if it's a
Pod::POM::Node::Head2 object, then the view_head2($node) method is
dispatched. And so on, and so on, with each node knowing what it is
and where it's going as if determined by some genetically pre-programmed
instinct. Fullfilling their destinies, so to speak.
Double dispatch allows us to do away with all the explicit type
checking and other nonsense and have the node objects themselves worry
about where they should be routed to. At the cost of an extra method
call per node, we get programmer convenience, and that's usually
a Good Thing.
Let's have a look at how the view and node classes might be
implemented.
package Pod::POM::View::HTML;
sub view_pod {
my ($self, $node) = @_;
return $node->content->present($self);
}
sub view_head1 {
my ($self, $node) = @_;
return "<h1>", $node->title->present($self), "</h1>\n\n"
. $node->content->present($self);
}
sub view_head2 {
my ($self, $node) = @_;
return "<h2>", $node->title->present($self), "</h2>\n\n"
. $node->content->present($self);
}
...
package Pod::POM::Node::Pod;
sub present {
my ($self, $view) = @_;
$view->view_pod($self);
}
package Pod::POM::Node::Head1;
sub present {
my ($self, $view) = @_;
$view->view_head1($self);
}
package Pod::POM::Node::Head2;
sub present {
my ($self, $view) = @_;
$view->view_head2($self);
}
...
Some of the view_xxx methods make calls back against the node objects
to display their attributes and/or content. This is shown in, for
example, the view_head1() method above, where the method prints the
section title in C<E<lt>h1E<gt>>...C<E<lt>h1E<gt>> tags, followed by
the remaining section content.
Note that the title() attribute is printed by calling its present()
method, passing on the reference to the current view. Similarly,
the content present() method is called giving it a chance to Do
The Right Thing to present itself correctly via the view object.
There's a good chance that the title attribute is going to be regular
text, so we might be tempted to simply print the title rather than
call its present method.
sub view_head1 {
my ($self, $node) = @_;
# not recommended, prefer $node->title->present($self)
return "<h1>", $node->title(), "</h1>\n\n", ...
}
However, it is entirely valid for titles and other element attributes,
as well as regular, formatted text blocks to contain code sequences,
such like C<BE<lt>thisE<gt>> and C<IE<lt>thisE<gt>>. These are used
to indicate different markup styles, mark external references or index
items, and so on. What's more, they can be C<BE<lt>nested
IE<lt>indefinatelyE<gt>E<gt>>. Pod::POM takes care of all this by
parsing such text, along with any embedded sequences, into Yet Another
Tree, the root node of which is a Pod::POM::Node::Text object,
possibly containing other Pod::POM::Node::Sequence objects. When the
text is presented, the tree is automatically walked and relevant
callbacks made against the view for the different sequence types. The
methods called against the view are all prefixed 'view_seq_', e.g.
'view_seq_bold', 'view_seq_italic'.
Now the real magic comes into effect. You can define one view to
render bold/italic text in one style:
package My::View::Text;
use base qw( Pod::POM::View::Text );
sub view_seq_bold {
my ($self, $text) = @_;
return "*$text*";
}
sub view_seq_italic {
my ($self, $text) = @_;
return "_$text_";
}
And another view to render it in a different style:
package My::View::HTML;
use base qw( Pod::POM::View::HTML );
sub view_seq_bold {
my ($self, $text) = @_;
return "<b>$text</b>";
}
sub view_seq_italic {
my ($self, $text) = @_;
return "<i>$text</i>";
}
Then, you can easily view a Pod Object Model in either style:
my $text = 'My::View::Text';
my $html = 'My::View::HTML';
print $pom->present($text);
print $pom->present($html);
And you can apply this technique to any node within the object
model.
print $pom->head1->[0]->present($text);
print $pom->head1->[0]->present($html);
In these examples, the view passed to the present() method has
been a class name. Thus, the view_xxx methods get called as
class methods, as if written:
My::View::Text->view_head1(...);
If your view needs to maintain state then you can create a view object
and pass that to the present() method.
my $view = My::View->new();
$node->present($view);
In this case the view_xxx methods get called as object methods.
sub view_head1 {
my ($self, $node) = @_;
my $title = $node->title();
if ($title eq 'NAME' && ref $self) {
$self->{ title } = $title();
}
$self->SUPER::view_head1($node);
}
Whenever you print a Pod::POM::Node::* object, or do anything to cause
Perl to stringify it (such as including it another quoted string "like
$this"), then its present() method is automatically called. When
called without a view argument, the present() method uses the default
view specified in $Pod::POM::DEFAULT_VIEW, which is, by default,
'Pod::POM::View::Pod'. This view regenerates the original Pod
document, although it should be noted that the output generated may
not be exactly the same as the input. The parser is smart enough to
detect some common errors (e.g. not terminating an C<=over> with a C<=back>)
and correct them automatically. Thus you might find a C<=back>
correctly placed in the output, even if you forgot to add it to the
input. Such corrections raise non-fatal warnings which can later
be examined via the warnings() method.
You can update the $Pod::POM::DEFAULT_VIEW package variable to set the
default view, or call the default_view() method. The default_view()
method will automatically load any package you specify. If setting
the package variable directly, you should ensure that any packages
required have been pre-loaded.
use My::View::HTML;
$Pod::POM::DEFAULT_VIEW = 'My::View::HTML';
or
Pod::POM->default_view('My::View::HTML');
=head2 Template Toolkit Views
One of the motivations for writing this module was to make it easier
to customise Pod documentation to your own look and feel or local
formatting conventions. By clearly separating the content
(represented by the Pod Object Model) from the presentation style
(represented by one or more views) it becomes much easier to achieve
this.
The latest version of the Template Toolkit (2.06 at the time of
writing) provides a Pod plugin to interface to this module. It also
implements a new (but experimental) VIEW directive which can be used
to build different presentation styles for converting Pod to other
formats. The Template Toolkit is available from CPAN:
http://www.cpan.org/modules/by-module/Template/
Template Toolkit views are similar to the Pod::POM::View objects
described above, except that they allow the presentation style for
each Pod component to be written as a template file or block rather
than an object method. The precise syntax and structure of the VIEW
directive is subject to change (given that it's still experimental),
but at present it can be used to define a view something like this:
[% VIEW myview %]
[% BLOCK view_head1 %]
<h1>[% item.title.present(view) %]</h1>
[% item.content.present(view) %]
[% END %]
[% BLOCK view_head2 %]
<h2>[% item.title.present(view) %]</h2>
[% item.content.present(view) %]
[% END %]
...
[% END %]
A plugin is provided to interface to the Pod::POM module:
[% USE pod %]
[% pom = pod.parse('/path/to/podfile') %]
The returned Pod Object Model instance can then be navigated and
presented via the view in almost any way imaginable:
<h1>Table of Contents</h1>
<ul>
[% FOREACH section = pom.head1 %]
<li>[% section.title.present(view) %]
[% END %]
</ul>
<hr>
[% FOREACH section = pom.head1 %]
[% section.present(myview) %]
[% END %]
You can either pass a reference to the VIEW (myview) to the
present() method of a Pod::POM node:
[% pom.present(myview) %] # present entire document
Or alternately call the print() method on the VIEW, passing the
Pod::POM node as an argument:
[% myview.print(pom) %]
Internally, the view calls the present() method on the node,
passing itself as an argument. Thus it is equivalent to the
previous example.
The Pod::POM node and the view conspire to "Do The Right Thing" to
process the right template block for the node. A reference to the
node is available within the template as the 'item' variable.
[% BLOCK view_head2 %]
<h2>[% item.title.present(view) %]</h2>
[% item.content.present(view) %]
[% END %]
The Template Toolkit documentation contains further information on
defining and using views. However, as noted above, this may be
subject to change or incomplete pending further development of the
VIEW directive.
=head1 METHODS
=head2 new(\%config)
Constructor method which instantiates and returns a new Pod::POM
parser object.
use Pod::POM;
my $parser = Pod::POM->new();
A reference to a hash array of configuration options may be passed as
an argument.
my $parser = Pod::POM->new( { warn => 1 } );
For convenience, configuration options can also be passed as a list of
(key =E<gt> value) pairs.
my $parser = Pod::POM->new( warn => 1 );
The following configuration options are defined:
=over 4
=item code
This option can be set to have all non-Pod parts of the input document
stored within the object model as 'code' elements, represented by
objects of the Pod::POM::Node::Code class. It is disabled by default
and code sections are ignored.
my $parser = Pod::POM->new( code => 1 );
my $podpom = $parser->parse(\*DATA);
foreach my $code ($podpom->code()) {
print "<pre>$code</pre>\n";
}
__DATA__
This is some program code.
=head1 NAME
...
This will generate the output:
<pre>This is some program code.</pre>
Note that code elements are stored within the POM element in which
they are encountered. For example, the code element below embedded
within between Pod sections is stored in the array which can be
retrieved by calling C<$podpom-E<gt>head1-E<gt>[0]-E<gt>code()>.
=head1 NAME
My::Module::Name;
=cut
Some program code embedded in Pod.
=head1 SYNOPSIS
...
=item warn
Non-fatal warnings encountered while parsing a Pod document are stored
internally and subsequently available via the warnings() method.
my $parser = Pod::POM->new();
my $podpom = $parser->parse_file($filename);
foreach my $warning ($parser->warnings()) {
warn $warning, "\n";
}
The 'warn' option can be set to have warnings raised automatically
via C<warn()> as and when they are encountered.
my $parser = Pod::POM->new( warn => 1 );
my $podpom = $parser->parse_file($filename);
If the configuration value is specified as a subroutine reference then
the code will be called each time a warning is raised, passing the
warning message as an argument.
sub my_warning {
my $msg = shift;
warn $msg, "\n";
};
my $parser = Pod::POM->new( warn => \&my_warning );
my $podpom = $parser->parse_file($filename);
=item meta
The 'meta' option can be set to allow C<=meta> tags within the Pod
document.
my $parser = Pod::POM->new( meta => 1 );
my $podpom = $parser->parse_file($filename);
This is an experimental feature which is not part of standard
POD. For example:
=meta author Andy Wardley
These are made available as metadata items within the root
node of the parsed POM.
my $author = $podpom->metadata('author');
See the L<METADATA|METADATA> section below for further information.
=back
=head2 parse_file($file)
Parses the file specified by name or reference to a file handle.
Returns a reference to a Pod::POM::Node::Pod object which represents
the root node of the Pod Object Model on success. On error, undef
is returned and the error message generated can be retrieved by calling
error().
my $podpom = $parser->parse_file($filename)
|| die $parser->error();
my $podpom = $parser->parse_file(\*STDIN)
|| die $parser->error();
Any warnings encountered can be examined by calling the
warnings() method.
foreach my $warn ($parser->warnings()) {
warn $warn, "\n";
}
=head2 parse_text($text)
Parses the Pod text string passed as an argument into a Pod Object
Model, as per parse_file().
=head2 parse($text_or_$file)
General purpose method which attempts to Do The Right Thing in calling
parse_file() or parse_text() according to the argument passed.
A hash reference can be passed as an argument that contains a 'text'
or 'file' key and corresponding value.
my $podpom = $parser->parse({ file => $filename })
|| die $parser->error();
Otherwise, the argument can be a reference to an input handle which is
passed off to parse_file().
my $podpom = $parser->parse(\*DATA)
|| die $parser->error();
If the argument is a text string that looks like Pod text (i.e. it
contains '=' at the start of any line) then it is passed to parse_text().
my $podpom = $parser->parse($podtext)
|| die $parser->error();
Otherwise it is assumed to be a filename and is passed to parse_file().
my $podpom = $parser->parse($podfile)
|| die $parser->error();
=head1 NODE TYPES, ATTRIBUTES AND ELEMENTS
This section lists the different nodes that may be present in a Pod Object
Model. These are implemented as Pod::POM::Node::* object instances
(e.g. head1 =E<gt> Pod::POM::Node::Head1). To present a node, a view should
implement a method which corresponds to the node name prefixed by 'view_'
(e.g. head1 =E<gt> view_head1()).
=over 4
=item pod
The C<pod> node is used to represent the root node of the Pod Object Model.
Content elements: head1, head2, head3, head4, over, begin, for,
verbatim, text, code.
=item head1
A C<head1> node contains the Pod content from a C<=head1> tag up to the
next C<=head1> tag or the end of the file.
Attributes: title
Content elements: head2, head3, head4, over, begin, for, verbatim, text, code.
=item head2
A C<head2> node contains the Pod content from a C<=head2> tag up to the
next C<=head1> or C<=head2> tag or the end of the file.
Attributes: title
Content elements: head3, head4, over, begin, for, verbatim, text, code.
=item head3
A C<head3> node contains the Pod content from a C<=head3> tag up to the
next C<=head1>, C<=head2> or C<=head3> tag or the end of the file.
Attributes: title
Content elements: head4, over, begin, for, verbatim, text, code.
=item head4
A C<head4> node contains the Pod content from a C<=head4> tag up to the
next C<=head1>, C<=head2>, C<=head3> or C<=head4> tag or the end of the file.
Attributes: title
Content elements: over, begin, for, verbatim, text, code.
=item over
The C<over> node encloses the Pod content in a list starting at an C<=over>
tag and continuing up to the matching C<=back> tag. Lists may be nested
indefinately.
Attributes: indent (default: 4)
Content elements: over, item, begin, for, verbatim, text, code.
=item item
The C<item> node encloses the Pod content in a list item starting at an
C<=item> tag and continuing up to the next C<=item> tag or a C<=back> tag
which terminates the list.
Attributes: title (default: *)
Content elements: over, begin, for, verbatim, text, code.
=item begin
A C<begin> node encloses the Pod content in a conditional block starting
with a C<=begin> tag and continuing up to the next C<=end> tag.
Attributes: format
Content elements: verbatim, text, code.
=item for
A C<for> node contains a single paragraph containing text relevant to a
particular format.
Attributes: format, text
=item verbatim
A C<verbatim> node contains a verbatim text paragraph which is prefixed by
whitespace in the source Pod document (i.e. indented).
Attributes: text
=item text
A C<text> node contains a regular text paragraph. This may include
embedded inline sequences.
Attributes: text
=item code
A C<code> node contains Perl code which is by default, not considered to be
part of a Pod document. The C<code> configuration option must be set for
Pod::POM to generate code blocks, otherwise they are ignored.
Attributes: text
=back
=head1 INLINE SEQUENCES
Embedded sequences are permitted within regular text blocks (i.e. not
verbatim) and title attributes. To present these sequences, a view
should implement methods corresponding to the sequence name, prefixed
by 'view_seq_' (e.g. bold =E<gt> view_seq_bold()).
=over 4
=item code
Code extract, e.g. CE<lt>my codeE<gt>
=item bold
Bold text, e.g. BE<lt>bold textE<gt>
=item italic
Italic text, e.g. IE<lt>italic textE<gt>
=item link
A link (cross reference), e.g. LE<lt>My::ModuleE<gt>
=item space
Text contains non-breaking space, e.g.SE<lt>Buffy The Vampire SlayerE<gt>
=item file
A filename, e.g. FE<lt>/etc/lilo.confE<gt>
=item index
An index entry, e.g. XE<lt>AngelE<gt>
=item zero
A zero-width character, e.g. ZE<lt>E<gt>
=item entity
An entity escape, e.g. EE<lt>ltE<gt>
=back
=head1 BUNDLED MODULES AND TOOLS
The Pod::POM module distribution includes a number of sample view
objects for rendering Pod Object Models into particular formats. These
are incomplete and may require some further work, but serve at present to
illustrate the principal and can be used as the basis for your own view
objects.
=over 4
=item Pod::POM::View::Pod
Regenerates the model as Pod.
=item Pod::POM::View::Text
Presents the model as plain text.
=item Pod::POM::View::HTML
Presents the model as HTML.
=back
A script is provided for converting Pod documents to other format by
using the view objects provided. The C<pom2> script should be called
with two arguments, the first specifying the output format, the second
the input filename. e.g.
$ pom2 text My/Module.pm > README
$ pom2 html My/Module.pm > ~/public_html/My/Module.html
You can also create symbolic links to the script if you prefer and
leave it to determine the output format from its own name.
$ ln -s pom2 pom2text
$ ln -s pom2 pom2html
$ pom2text My/Module.pm > README
$ pom2html My/Module.pm > ~/public_html/My/Module.html
The distribution also contains a trivial script, C<podlint>
(previously C<pomcheck>), which checks a Pod document for
well-formedness by simply parsing it into a Pod Object Model with
warnings enabled. Warnings are printed to STDERR.
$ podlint My/Module.pm
The C<-f> option can be set to have the script attempt to fix any problems
it encounters. The regenerated Pod output is printed to STDOUT.
$ podlint -f My/Module.pm > newfile
=head1 METADATA
This module includes support for an experimental new C<=meta> tag. This
is disabled by default but can be enabled by loading Pod::POM with the
C<meta> option.
use Pod::POM qw( meta );
Alternately, you can specify the C<meta> option to be any true value when
you instantiate a Pod::POM parser:
my $parser = Pod::POM->new( meta => 1 );
my $pom = $parser->parse_file($filename);
Any C<=meta> tags in the document will be stored as metadata items in the
root node of the Pod model created.
For example:
=meta module Foo::Bar
=meta author Andy Wardley
You can then access these items via the metadata() method.
print "module: ", $pom->metadata('module'), "\n";
print "author: ", $pom->metadata('author'), "\n";
or
my $metadata = $pom->metadata();
print "module: $metadata->{ module }\n";
print "author: $metadata->{ author }\n";
Please note that this is an experimental feature which is not supported by
other POD processors and is therefore likely to be most incompatible. Use
carefully.
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt> (co-maintainer as of 03/2009)
=head1 VERSION
This is version 0.25 of the Pod::POM module.
=head1 COPYRIGHT
Copyright (C) 2000-2009 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
For the definitive reference on Pod, see L<perlpod>.
For an overview of Pod::POM internals and details relating to subclassing
of POM nodes, see L<Pod::POM::Node>.
There are numerous other fine Pod modules available from CPAN which
perform conversion from Pod to other formats. In many cases these are
likely to be faster and quite possibly more reliable and/or complete
than this module. But as far as I know, there aren't any that offer
the same kind of flexibility in being able to customise the generated
output. But don't take my word for it - see your local CPAN site for
further details:
http://www.cpan.org/modules/by-module/Pod/
POD_POM
$fatpacked{"Pod/POM/Constants.pm"} = <<'POD_POM_CONSTANTS';
#============================================================= -*-Perl-*-
#
# Pod::POM::Constants
#
# DESCRIPTION
# Constants used by Pod::POM.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Constants.pm 78 2009-08-20 20:44:53Z ford $
#
#========================================================================
package Pod::POM::Constants;
require 5.004;
use strict;
use vars qw( $VERSION @SEQUENCE @STATUS @EXPORT_OK %EXPORT_TAGS );
use parent qw( Exporter );
$VERSION = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
@SEQUENCE = qw( CMD LPAREN RPAREN FILE LINE CONTENT );
@STATUS = qw( IGNORE REDUCE REJECT );
@EXPORT_OK = ( @SEQUENCE, @STATUS );
%EXPORT_TAGS = (
status => [ @STATUS ],
seq => [ @SEQUENCE ],
all => [ @STATUS, @SEQUENCE ],
);
# sequence items
use constant CMD => 0;
use constant LPAREN => 1;
use constant RPAREN => 2;
use constant FILE => 3;
use constant LINE => 4;
use constant CONTENT => 5;
# node add return values
use constant IGNORE => 0;
use constant REDUCE => 1;
use constant REJECT => 2;
1;
=head1 NAME
Pod::POM::Constants
=head1 DESCRIPTION
Constants used by Pod::POM.
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
POD_POM_CONSTANTS
$fatpacked{"Pod/POM/Node.pm"} = <<'POD_POM_NODE';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node
#
# DESCRIPTION
# Base class for a node in a Pod::POM tree.
#
# AUTHOR
# Andy Wardley <abw@wardley.org>
#
# COPYRIGHT
# Copyright (C) 2000-2003 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Node.pm 88 2010-04-02 13:37:41Z ford $
#
#========================================================================
package Pod::POM::Node;
require 5.004;
use strict;
use Pod::POM::Nodes;
use Pod::POM::Constants qw( :all );
use vars qw( $VERSION $DEBUG $ERROR $NODES $NAMES $AUTOLOAD );
use constant DUMP_LINE_LENGTH => 80;
$VERSION = sprintf("%d.%02d", q$Revision: 1.5 $ =~ /(\d+)\.(\d+)/);
$DEBUG = 0 unless defined $DEBUG;
$NODES = {
pod => 'Pod::POM::Node::Pod',
head1 => 'Pod::POM::Node::Head1',
head2 => 'Pod::POM::Node::Head2',
head3 => 'Pod::POM::Node::Head3',
head4 => 'Pod::POM::Node::Head4',
over => 'Pod::POM::Node::Over',
item => 'Pod::POM::Node::Item',
begin => 'Pod::POM::Node::Begin',
for => 'Pod::POM::Node::For',
text => 'Pod::POM::Node::Text',
code => 'Pod::POM::Node::Code',
verbatim => 'Pod::POM::Node::Verbatim',
};
$NAMES = {
map { ( $NODES->{ $_ } => $_ ) } keys %$NODES,
};
# overload stringification to present node via a view
use overload
'""' => 'present',
fallback => 1,
'bool' => sub { 1 };
# alias meta() to metadata()
*meta = \*metadata;
#------------------------------------------------------------------------
# new($pom, @attr)
#
# Constructor method. Returns a new Pod::POM::Node::* object or undef
# on error. First argument is the Pod::POM parser object, remaining
# arguments are node attributes as specified in %ATTRIBS in derived class
# package.
#------------------------------------------------------------------------
sub new {
my $class = shift;
my $pom = shift;
my ($type, $attribs, $accept, $key, $value, $default);
$type = $NAMES->{ $class };
{
no strict qw( refs );
$attribs = \%{"$class\::ATTRIBS"} || [ ];
$accept = \@{"$class\::ACCEPT"} || [ ];
unless (%{"$class\::ACCEPT"}) {
%{"$class\::ACCEPT"} = (
map { ( $_ => $NODES->{ $_ } ) } @$accept,
);
}
}
# create object with slots for each acceptable child and overall content
my $self = bless {
type => $type,
content => bless([ ], 'Pod::POM::Node::Content'),
map { ($_ => bless([ ], 'Pod::POM::Node::Content')) }
(@$accept, 'code'),
}, $class;
# set attributes from arguments
keys %$attribs; # reset hash iterator
while(my ($key, $default) = each %$attribs) {
$value = shift || $default;
return $class->error("$type expected a $key")
unless $value;
$self->{ $key } = $value;
}
return $self;
}
#------------------------------------------------------------------------
# add($pom, $type, @attr)
#
# Adds a new node as a child element (content) of the current node.
# First argument is the Pod::POM parser object. Second argument is the
# child node type specified by name (e.g. 'head1') which is mapped via
# the $NODES hash to a class name against which new() can be called.
# Remaining arguments are attributes passed to the child node constructor.
# Returns a reference to the new node (child was accepted) or one of the
# constants REDUCE (child terminated node, e.g. '=back' terminates an
# '=over' node), REJECT (child rejected, e.g. '=back' expected to terminate
# '=over' but something else found instead) or IGNORE (node didn't expect
# child and is implicitly terminated).
#------------------------------------------------------------------------
sub add {
my $self = shift;
my $pom = shift;
my $type = shift;
my $class = ref $self;
my ($name, $attribs, $accept, $expect, $nodeclass, $node);
$name = $NAMES->{ $class }
|| return $self->error("no name for $class");
{
no strict qw( refs );
$accept = \%{"$class\::ACCEPT"};
$expect = ${"$class\::EXPECT"};
}
# SHIFT: accept indicates child nodes that can be accepted; a
# new node is created, added it to content list and node specific
# list, then returned by reference.
if ($nodeclass = $accept->{ $type }) {
defined($node = $nodeclass->new($pom, @_))
|| return $self->error($nodeclass->error())
unless defined $node;
push(@{ $self->{ $type } }, $node);
push(@{ $self->{ content } }, $node);
$pom->{in_begin} = 1 if $nodeclass eq 'Pod::POM::Node::Begin';
return $node;
}
# REDUCE: expect indicates the token that should terminate this node
if (defined $expect && ($type eq $expect)) {
DEBUG("$name terminated by expected $type\n");
$pom->{in_begin} = 0 if $name eq 'begin';
return REDUCE;
}
# REJECT: expected terminating node was not found
if (defined $expect) {
DEBUG("$name rejecting $type, expecting a terminating $expect\n");
$self->error("$name expected a terminating $expect");
return REJECT;
}
# IGNORE: don't know anything about this node
DEBUG("$name ignoring $type\n");
return IGNORE;
}
#------------------------------------------------------------------------
# present($view)
#
# Present the node by making a callback on the appropriate method against
# the view object passed as an argument. $Pod::POM::DEFAULT_VIEW is used
# if $view is unspecified.
#------------------------------------------------------------------------
sub present {
my ($self, $view, @args) = @_;
$view ||= $Pod::POM::DEFAULT_VIEW;
my $type = $self->{ type };
my $method = "view_$type";
DEBUG("presenting method $method to $view\n");
my $txt = $view->$method($self, @args);
if ($view->can("encode")){
return $view->encode($txt);
} else {
return $txt;
}
}
#------------------------------------------------------------------------
# metadata()
# metadata($key)
# metadata($key, $value)
#
# Returns the metadata hash when called without any arguments. Returns
# the value of a metadata item when called with a single argument.
# Sets a metadata item to a value when called with two arguments.
#------------------------------------------------------------------------
sub metadata {
my ($self, $key, $value) = @_;
my $metadata = $self->{ METADATA } ||= { };
return $metadata unless defined $key;
if (defined $value) {
$metadata->{ $key } = $value;
}
else {
$value = $self->{ METADATA }->{ $key };
return defined $value ? $value
: $self->error("no such metadata item: $key");
}
}
#------------------------------------------------------------------------
# error()
# error($msg, ...)
#
# May be called as a class or object method to set or retrieve the
# package variable $ERROR (class method) or internal member
# $self->{ _ERROR } (object method). The presence of parameters indicates
# that the error value should be set. Undef is then returned. In the
# abscence of parameters, the current error value is returned.
#------------------------------------------------------------------------
sub error {
my $self = shift;
my $errvar;
# use Carp;
{
no strict qw( refs );
if (ref $self) {
# my ($pkg, $file, $line) = caller();
# print STDERR "called from $file line $line\n";
# croak "cannot get/set error in non-hash: $self\n"
# unless UNIVERSAL::isa($self, 'HASH');
$errvar = \$self->{ ERROR };
}
else {
$errvar = \${"$self\::ERROR"};
}
}
if (@_) {
$$errvar = ref($_[0]) ? shift : join('', @_);
return undef;
}
else {
return $$errvar;
}
}
#------------------------------------------------------------------------
# dump()
#
# Returns a representation of the element and all its children in a
# format useful only for debugging. The structure of the document is
# shown by indentation (inspired by HTML::Element).
#------------------------------------------------------------------------
sub dump {
my($self, $depth) = @_;
my $output;
$depth = 0 unless defined $depth;
my $nodepkg = ref $self;
if ($self->isa('REF')) {
$self = $$self;
my $cmd = $self->[CMD];
my @content = @{ $self->[CONTENT] };
if ($cmd) {
$output .= (" " x $depth) . $cmd . $self->[LPAREN] . "\n";
}
foreach my $item (@content) {
if (ref $item) {
$output .= $item->dump($depth+1); # recurse
}
else { # text node
$output .= _dump_text($item, $depth+1);
}
}
if ($cmd) {
$output .= (" " x $depth) . $self->[RPAREN] . "\n", ;
}
}
else {
no strict 'refs';
my @attrs = sort keys %{"*${nodepkg}::ATTRIBS"};
$output .= (" " x $depth) . $self->type . "\n";
foreach my $attr (@attrs) {
if (my $value = $self->{$attr}) {
$output .= (" " x ($depth+1)) . "\@$attr\n";
if (ref $value) {
$output .= $value->dump($depth+1);
}
else {
$output .= _dump_text($value, $depth+2);
}
}
}
foreach my $item (@{$self->{content}}) {
if (ref $item) { # element
$output .= $item->dump($depth+1); # recurse
}
else { # text node
$output .= _dump_text($item, $depth+1);
}
}
}
return $output;
}
sub _dump_text {
my ($text, $depth) = @_;
my $output = "";
my $padding = " " x $depth;
my $max_text_len = DUMP_LINE_LENGTH - length($depth) - 2;
foreach my $line (split(/\n/, $text)) {
$output .= $padding;
if (length($line) > $max_text_len or $line =~ m<[\x00-\x1F]>) {
# it needs prettyin' up somehow or other
my $x = (length($line) <= $max_text_len) ? $_ : (substr($line, 0, $max_text_len) . '...');
$x =~ s<([\x00-\x1F])>
<'\\x'.(unpack("H2",$1))>eg;
$output .= qq{"$x"\n};
} else {
$output .= qq{"$line"\n};
}
}
return $output;
}
#------------------------------------------------------------------------
# AUTOLOAD
#------------------------------------------------------------------------
sub AUTOLOAD {
my $self = shift;
my $name = $AUTOLOAD;
my $item;
$name =~ s/.*:://;
return if $name eq 'DESTROY';
# my ($pkg, $file, $line) = caller();
# print STDERR "called from $file line $line to return ", ref($item), "\n";
return $self->error("can't manipulate \$self")
unless UNIVERSAL::isa($self, 'HASH');
return $self->error("no such member: $name")
unless defined ($item = $self->{ $name });
return wantarray ? ( UNIVERSAL::isa($item, 'ARRAY') ? @$item : $item )
: $item;
}
#------------------------------------------------------------------------
# DEBUG(@msg)
#------------------------------------------------------------------------
sub DEBUG {
print STDERR "DEBUG: ", @_ if $DEBUG;
}
1;
=head1 NAME
Pod::POM::Node - base class for a POM node
=head1 SYNOPSIS
package Pod::POM::Node::Over;
use base qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $EXPECT $ERROR );
%ATTRIBS = ( indent => 4 );
@ACCEPT = qw( over item begin for text verbatim );
$EXPECT = q( back );
package main;
my $list = Pod::POM::Node::Over->new(8);
$list->add('item', 'First Item');
$list->add('item', 'Second Item');
...
=head1 DESCRIPTION
This documentation describes the inner workings of the Pod::POM::Node
module and gives a brief overview of the relationship between it and
its derived classes. It is intended more as a guide to the internals
for interested hackers than as general user documentation. See
L<Pod::POM> for information on using the modules.
This module implements a base class node which is subclassed to
represent different elements within a Pod Object Model.
package Pod::POM::Node::Over;
use base qw( Pod::POM::Node );
The base class implements the new() constructor method to instantiate
new node objects.
my $list = Pod::POM::Node::Over->new();
The characteristics of a node can be specified by defining certain
variables in the derived class package. The C<%ATTRIBS> hash can be
used to denote attributes that the node should accept. In the case of
an C<=over> node, for example, an C<indent> attribute can be specified
which otherwise defaults to 4.
package Pod::POM::Node::Over;
use base qw( Pod::POM::Node );
use vars qw( %ATTRIBS $ERROR );
%ATTRIBS = ( indent => 4 );
The new() method will now expect an argument to set the indent value,
or will use 4 as the default if no argument is provided.
my $list = Pod::POM::Node::Over->new(8); # indent: 8
my $list = Pod::POM::Node::Over->new( ); # indent: 4
If the default value is undefined then the argument is mandatory.
package Pod::POM::Node::Head1;
use base qw( Pod::POM::Node );
use vars qw( %ATTRIBS $ERROR );
%ATTRIBS = ( title => undef );
package main;
my $head = Pod::POM::Node::Head1->new('My Title');
If a mandatory argument isn't provided then the constructor will
return undef to indicate failure. The $ERROR variable in the derived
class package is set to contain a string of the form "$type expected a
$attribute".
# dies with error: "head1 expected a title"
my $head = Pod::POM::Node::Head1->new()
|| die $Pod::POM::Node::Head1::ERROR;
For convenience, the error() subroutine can be called as a class
method to retrieve this value.
my $type = 'Pod::POM::Node::Head1';
my $head = $type->new()
|| die $type->error();
The C<@ACCEPT> package variable can be used to indicate the node types
that are permitted as children of a node.
package Pod::POM::Node::Head1;
use base qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $ERROR );
%ATTRIBS = ( title => undef );
@ACCEPT = qw( head2 over begin for text verbatim );
The add() method can then be called against a node to add a new child
node as part of its content.
$head->add('over', 8);
The first argument indicates the node type. The C<@ACCEPT> list is
examined to ensure that the child node type is acceptable for the
parent node. If valid, the constructor for the relevant child node
class is called passing any remaining arguments as attributes. The
new node is then returned.
my $list = $head->add('over', 8);
The error() method can be called against the I<parent> node to retrieve
any constructor error generated by the I<child> node.
my $list = $head->add('over', 8);
die $head->error() unless defined $list;
If the child node is not acceptable to the parent then the add()
method returns one of the constants IGNORE, REDUCE or REJECT, as
defined in Pod::POM::Constants. These return values are used by the
Pod::POM parser module to implement a simple shift/reduce parser.
In the most common case, IGNORE is returned to indicate that the
parent node doesn't know anything about the new child node. The
parser uses this as an indication that it should back up through the
parse stack until it finds a node which I<will> accept this child node.
Through this mechanism, the parser is able to implicitly terminate
certain POD blocks. For example, a list item initiated by a C<=item>
tag will I<not> accept another C<=item> tag, but will instead return IGNORE.
The parser will back out until it finds the enclosing C<=over> node
which I<will> accept it. Thus, a new C<=item> implicitly terminates any
previous C<=item>.
The C<$EXPECT> package variable can be used to indicate a node type
which a parent expects to terminate itself. An C<=over> node, for
example, should always be terminated by a matching C<=back>. When
such a match is made, the add() method returns REDUCE to indicate
successful termination.
package Pod::POM::Node::Over;
use base qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $EXPECT $ERROR );
%ATTRIBS = ( indent => 4 );
@ACCEPT = qw( over item begin for text verbatim );
$EXPECT = q( back );
package main;
my $list = Pod::POM::Node::Over->new();
my $item = $list->add('item');
$list->add('back'); # returns REDUCE
If a child node isn't specified in the C<@ACCEPT> list or doesn't match
any C<$EXPECT> specified then REJECT is returned. The parent node sets
an internal error of the form "$type expected a terminating $expect".
The parser uses this to detect missing POD tags. In nearly all cases
the parser is smart enough to fix the incorrect structure and downgrades
any errors to warnings.
# dies with error 'over expected terminating back'
ref $list->add('head1', 'My Title') # returns REJECT
|| die $list->error();
Each node contains a 'type' field which contains a simple string
indicating the node type, e.g. 'head1', 'over', etc. The $NODES and
$NAMES package variables (in the base class) reference hash arrays
which map these names to and from package names (e.g. head1 E<lt>=E<gt>
Pod::POM::Node::Head1).
print $list->{ type }; # 'over'
An AUTOLOAD method is provided to access to such internal items for
those who don't like violating an object's encapsulation.
print $list->type();
Nodes also contain a 'content' list, blessed into the
Pod::POM::Node::Content class, which contains the content (child
elements) for the node. The AUTOLOAD method returns this as a list
reference or as a list of items depending on the context in which it
is called.
my $items = $list->content();
my @items = $list->content();
Each node also contains a content list for each individual child node
type that it may accept.
my @items = $list->item();
my @text = $list->text();
my @vtext = $list->verbatim();
The present() method is used to present a node through a particular view.
This simply maps the node type to a method which is then called against the
view object. This is known as 'double dispatch'.
my $view = 'Pod::POM::View::HTML';
print $list->present($view);
The method name is constructed from the node type prefixed by 'view_'.
Thus the following are roughly equivalent.
$list->present($view);
$view->view_list($list);
The benefit of the former over the latter is, of course, that the
caller doesn't need to know or determine the type of the node. The
node itself is in the best position to determine what type it is.
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM> for a general overview and examples of use.
POD_POM_NODE
$fatpacked{"Pod/POM/Node/Begin.pm"} = <<'POD_POM_NODE_BEGIN';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Begin
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Begin.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Begin;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $EXPECT $ERROR );
%ATTRIBS = ( format => undef );
@ACCEPT = qw( text verbatim code );
$EXPECT = 'end';
1;
=head1 NAME
Pod::POM::Node::Begin - POM '=begin' node class
=head1 SYNOPSIS
=head1 DESCRIPTION
This module implements a specialization of the node class to represent '=begin' elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_BEGIN
$fatpacked{"Pod/POM/Node/Code.pm"} = <<'POD_POM_NODE_CODE';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Code
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Code.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Code;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS $ERROR );
%ATTRIBS = ( text => '' );
sub present {
my ($self, $view) = @_;
$view ||= $Pod::POM::DEFAULT_VIEW;
return $view->view_code($self->{ text });
}
1;
=head1 NAME
Pod::POM::Node::Code -
=head1 SYNOPSIS
=head1 DESCRIPTION
This module implements a specialization of the node class to represent code elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_CODE
$fatpacked{"Pod/POM/Node/Content.pm"} = <<'POD_POM_NODE_CONTENT';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Content
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Content.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Content;
use strict;
use Pod::POM::Constants qw( :all );
use parent qw( Pod::POM::Node );
sub new {
my $class = shift;
return bless [ @_ ], $class;
}
sub present {
my ($self, $view) = @_;
$view ||= $Pod::POM::DEFAULT_VIEW;
return join('', map { ref $_ ? $_->present($view) : $_ } @$self);
}
1;
=head1 NAME
Pod::POM::Node::Content -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_CONTENT
$fatpacked{"Pod/POM/Node/For.pm"} = <<'POD_POM_NODE_FOR';
#============================================================= -*-Perl-*-
#
# Pod::POM::Nodes
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: For.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::For;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS $ERROR );
%ATTRIBS = ( format => undef, text => '' );
sub new {
my $class = shift;
my $pom = shift;
my $text = shift;
return $class->SUPER::new($pom, split(/\s+/, $text, 2));
}
1;
=head1 NAME
Pod::POM::Node::For -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=for> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_FOR
$fatpacked{"Pod/POM/Node/Head1.pm"} = <<'POD_POM_NODE_HEAD1';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Head1
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Head1.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Head1;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $ERROR );
%ATTRIBS = ( title => undef );
@ACCEPT = qw( head2 head3 head4 over begin for text verbatim code );
sub new {
my ($class, $pom, $title) = @_;
$title = $pom->parse_sequence($title)
|| return $class->error($pom->error())
if length $title;
return $class->SUPER::new($pom, $title);
}
1;
=head1 NAME
Pod::POM::Node::Head1 -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=head1> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_HEAD1
$fatpacked{"Pod/POM/Node/Head2.pm"} = <<'POD_POM_NODE_HEAD2';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Head2
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Head2.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Head2;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $ERROR );
%ATTRIBS = ( title => undef );
@ACCEPT = qw( head3 head4 over begin for text verbatim code );
sub new {
my ($class, $pom, $title) = @_;
$title = $pom->parse_sequence($title)
|| return $class->error($pom->error())
if length $title;
return $class->SUPER::new($pom, $title);
}
1;
=head1 NAME
Pod::POM::Node::Head2 -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=head2> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_HEAD2
$fatpacked{"Pod/POM/Node/Head3.pm"} = <<'POD_POM_NODE_HEAD3';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Head3
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Head3.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Head3;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $ERROR );
%ATTRIBS = ( title => undef );
@ACCEPT = qw( head4 over begin for text verbatim code );
sub new {
my ($class, $pom, $title) = @_;
$title = $pom->parse_sequence($title)
|| return $class->error($pom->error())
if length $title;
return $class->SUPER::new($pom, $title);
}
1;
=head1 NAME
Pod::POM::Node::Head3 -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=head3> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_HEAD3
$fatpacked{"Pod/POM/Node/Head4.pm"} = <<'POD_POM_NODE_HEAD4';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Head4
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Head4.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Head4;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $ERROR );
%ATTRIBS = ( title => undef );
@ACCEPT = qw( over begin for text verbatim code );
sub new {
my ($class, $pom, $title) = @_;
$title = $pom->parse_sequence($title)
|| return $class->error($pom->error())
if length $title;
return $class->SUPER::new($pom, $title);
}
1;
=head1 NAME
Pod::POM::Node::Head4 -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=head4> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_HEAD4
$fatpacked{"Pod/POM/Node/Item.pm"} = <<'POD_POM_NODE_ITEM';
#============================================================= -*-Perl-*-
#
# Pod::POM::Nodes
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Item.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Item;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $ERROR );
%ATTRIBS = ( title => '*' );
@ACCEPT = qw( over begin for text verbatim code );
sub new {
my ($class, $pom, $title) = @_;
$title = $pom->parse_sequence($title)
|| return $class->error($pom->error())
if length $title;
return $class->SUPER::new($pom, $title);
}
1;
=head1 NAME
Pod::POM::Node::Item -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=item> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_ITEM
$fatpacked{"Pod/POM/Node/Over.pm"} = <<'POD_POM_NODE_OVER';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Over
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Over.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Over;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS @ACCEPT $EXPECT $ERROR );
%ATTRIBS = ( indent => 4 );
@ACCEPT = qw( over item begin for text verbatim code );
$EXPECT = 'back';
sub list_type {
my $self = shift;
my ($first, @rest) = $self->content;
my $first_type = $first->type;
return;
}
1;
=head1 NAME
Pod::POM::Node::Over - POM '=over' node class
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This class implements '=over' Pod nodes. As described by the L<perlpodspec> man page =over/=back regions are
used for various kinds of list-like structures (including blockquote paragraphs).
=item 1.
ordered list
=item *
text paragraph
unordered list
=item text
text paragraph
definition list
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_OVER
$fatpacked{"Pod/POM/Node/Pod.pm"} = <<'POD_POM_NODE_POD';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Pod
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Pod.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Pod;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( @ACCEPT $ERROR );
@ACCEPT = qw( head1 head2 head3 head4 over begin for text verbatim code );
1;
=head1 NAME
Pod::POM::Node::Pod -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent C<=pod> elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_POD
$fatpacked{"Pod/POM/Node/Sequence.pm"} = <<'POD_POM_NODE_SEQUENCE';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Sequence
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Sequence.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Sequence;
use strict;
use Pod::POM::Constants qw( :all );
use parent qw( Pod::POM::Node );
use vars qw( %NAME );
%NAME = (
C => 'code',
B => 'bold',
I => 'italic',
L => 'link',
S => 'space',
F => 'file',
X => 'index',
Z => 'zero',
E => 'entity',
);
sub new {
my ($class, $self) = @_;
local $" = '] [';
return bless \$self, $class;
}
sub add {
return IGNORE;
}
sub present {
my ($self, $view) = @_;
my ($cmd, $method, $result);
$view ||= $Pod::POM::DEFAULT_VIEW;
$self = $$self;
return $self unless ref $self eq 'ARRAY';
my $text = join('',
map { ref $_ ? $_->present($view)
: $view->view_seq_text($_) }
@{ $self->[CONTENT] });
if ($cmd = $self->[CMD]) {
my $method = $NAME{ $cmd } || $cmd;
$method = "view_seq_$method";
return $view->$method($text);
}
else {
return $text;
}
}
1;
=head1 NAME
Pod::POM::Node::Sequence -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent sequence elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_SEQUENCE
$fatpacked{"Pod/POM/Node/Text.pm"} = <<'POD_POM_NODE_TEXT';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Text
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Text.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Text;
use strict;
use Pod::POM::Constants qw( :all );
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS $ERROR );
%ATTRIBS = ( text => '' );
sub new {
my $class = shift;
my $pom = shift;
my $text = shift;
$text = $pom->parse_sequence($text)
|| return $class->error($pom->error())
if length $text && ! $pom->{in_begin};
return $class->SUPER::new($pom, $text);
}
sub add {
return IGNORE;
}
sub present {
my ($self, $view) = @_;
my $text = $self->{ text };
$view ||= $Pod::POM::DEFAULT_VIEW;
$text = $text->present($view)
if ref $text;
return $view->view_textblock($text);
}
1;
=head1 NAME
Pod::POM::Node::Text -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent text elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_TEXT
$fatpacked{"Pod/POM/Node/Verbatim.pm"} = <<'POD_POM_NODE_VERBATIM';
#============================================================= -*-Perl-*-
#
# Pod::POM::Node::Verbatim
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
# Andrew Ford <a.ford@ford-mason.co.uk>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
# Copyright (C) 2009 Andrew Ford. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Verbatim.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Node::Verbatim;
use strict;
use parent qw( Pod::POM::Node );
use vars qw( %ATTRIBS $ERROR );
%ATTRIBS = ( text => '' );
sub present {
my ($self, $view) = @_;
$view ||= $Pod::POM::DEFAULT_VIEW;
return $view->view_verbatim($self->{ text });
}
1;
=head1 NAME
Pod::POM::Node::Verbatim -
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a specialization of the node class to represent verbatim elements.
=head1 AUTHOR
Andrew Ford E<lt>a.ford@ford-mason.co.ukE<gt>
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
Copyright (C) 2009 Andrew Ford. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM::Node> for a discussion of nodes.
POD_POM_NODE_VERBATIM
$fatpacked{"Pod/POM/Nodes.pm"} = <<'POD_POM_NODES';
#============================================================= -*-Perl-*-
#
# Pod::POM::Nodes
#
# DESCRIPTION
# Module implementing specific nodes in a Pod::POM, subclassed from
# Pod::POM::Node.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Nodes.pm 76 2009-08-20 20:41:33Z ford $
#
#========================================================================
package Pod::POM::Nodes;
require 5.004;
require Exporter;
use strict;
use Pod::POM::Node::Pod;
use Pod::POM::Node::Head1;
use Pod::POM::Node::Head2;
use Pod::POM::Node::Head3;
use Pod::POM::Node::Head4;
use Pod::POM::Node::Over;
use Pod::POM::Node::Item;
use Pod::POM::Node::Begin;
use Pod::POM::Node::For;
use Pod::POM::Node::Verbatim;
use Pod::POM::Node::Code;
use Pod::POM::Node::Text;
use Pod::POM::Node::Sequence;
use Pod::POM::Node::Content;
use vars qw( $VERSION $DEBUG $ERROR @EXPORT_OK @EXPORT_FAIL );
use base qw( Exporter );
$VERSION = sprintf("%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/);
$DEBUG = 0 unless defined $DEBUG;
1;
=head1 NAME
Pod::POM::Nodes - convenience class to load all node classes
=head1 SYNOPSIS
use Pod::POM::Nodes;
=head1 DESCRIPTION
This module implements a convenience class that simply uses all of the subclasses of Pod::POM::Node.
(It used to include all the individual classes inline, but the node classes have been factored out
into individual modules.)
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=head1 SEE ALSO
Consult L<Pod::POM> for a general overview and examples of use.
POD_POM_NODES
$fatpacked{"Pod/POM/Test.pm"} = <<'POD_POM_TEST';
#============================================================= -*-Perl-*-
#
# Pod::POM::Test
#
# DESCRIPTION
# Module implementing some useful subroutines for testing.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Test.pm 14 2009-03-13 08:19:40Z ford $
#
#========================================================================
package Pod::POM::Test;
require 5.004;
use strict;
use Pod::POM;
use base qw( Exporter );
use vars qw( $VERSION @EXPORT );
$VERSION = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
@EXPORT = qw( ntests ok match assert );
my $ok_count;
sub ntests {
my $ntests = shift;
$ok_count = 1;
print "1..$ntests\n";
}
sub ok {
my ($ok, $msg) = @_;
if ($ok) {
print "ok ", $ok_count++, "\n";
}
else {
print "FAILED $ok_count: $msg\n" if defined $msg;
print "not ok ", $ok_count++, "\n";
}
}
sub assert {
my ($ok, $err) = @_;
return ok(1) if $ok;
# failed
my ($pkg, $file, $line) = caller();
$err ||= "assert failed";
$err .= " at $file line $line\n";
ok(0);
die $err;
}
sub match {
my ($result, $expect) = @_;
# force stringification of $result to avoid 'no eq method' overload errors
$result = "$result" if ref $result;
if ($result eq $expect) {
ok(1);
}
else {
print "FAILED $ok_count:\n expect: [$expect]\n result: [$result]\n";
ok(0);
}
}
1;
POD_POM_TEST
$fatpacked{"Pod/POM/View.pm"} = <<'POD_POM_VIEW';
#============================================================= -*-Perl-*-
#
# Pod::POM::View
#
# DESCRIPTION
# Visitor class for creating a view of all or part of a Pod Object
# Model.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
#
# COPYRIGHT
# Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: View.pm 32 2009-03-17 21:08:25Z ford $
#
#========================================================================
package Pod::POM::View;
require 5.004;
use strict;
use vars qw( $VERSION $DEBUG $ERROR $AUTOLOAD $INSTANCE );
$VERSION = sprintf("%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/);
$DEBUG = 0 unless defined $DEBUG;
#------------------------------------------------------------------------
# new($pom)
#------------------------------------------------------------------------
sub new {
my $class = shift;
my $args = ref $_[0] eq 'HASH' ? shift : { @_ };
bless { %$args }, $class;
}
sub print {
my ($self, $item) = @_;
return UNIVERSAL::can($item, 'present')
? $item->present($self) : $item;
}
sub view {
my ($self, $type, $node) = @_;
return $node;
}
sub instance {
my $self = shift;
my $class = ref $self || $self;
no strict 'refs';
my $instance = \${"$class\::_instance"};
defined $$instance
? $$instance
: ($$instance = $class->new(@_));
}
sub visit {
my ($self, $place) = @_;
$self = $self->instance() unless ref $self;
my $visit = $self->{ VISIT } ||= [ ];
push(@$visit, $place);
return $place;
}
sub leave {
my ($self, $place) = @_;
$self = $self->instance() unless ref $self;
my $visit = $self->{ VISIT };
return $self->error('empty VISIT stack') unless @$visit;
pop(@$visit);
}
sub visiting {
my ($self, $place) = @_;
$self = $self->instance() unless ref $self;
my $visit = $self->{ VISIT };
return 0 unless $visit && @$visit;
foreach (reverse @$visit) {
return 1 if $_ eq $place;
}
return 0;
}
sub AUTOLOAD {
my $self = shift;
my $name = $AUTOLOAD;
my $item;
$name =~ s/.*:://;
return if $name eq 'DESTROY';
if ($name =~ s/^view_//) {
return $self->view($name, @_);
}
elsif (! ref $self) {
die "can't access $name in $self\n";
}
else {
die "no such method for $self: $name ($AUTOLOAD)"
unless defined ($item = $self->{ $name });
return wantarray ? ( ref $item eq 'ARRAY' ? @$item : $item ) : $item;
}
}
1;
=head1 NAME
Pod::POM::View
=head1 DESCRIPTION
Visitor class for creating a view of all or part of a Pod Object Model.
=head1 METHODS
=over 4
=item C<new>
=item C<print>
=item C<view>
=item C<instance>
=item C<visit>
=item C<leave>
=item C<visiting>
=back
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2000, 2001 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
POD_POM_VIEW
$fatpacked{"Pod/POM/View/HTML.pm"} = <<'POD_POM_VIEW_HTML';
#============================================================= -*-Perl-*-
#
# Pod::POM::View::HTML
#
# DESCRIPTION
# HTML view of a Pod Object Model.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
#
# COPYRIGHT
# Copyright (C) 2000 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: HTML.pm 84 2009-08-20 21:07:00Z ford $
#
#========================================================================
package Pod::POM::View::HTML;
require 5.004;
use strict;
use Pod::POM::View;
use parent qw( Pod::POM::View );
use vars qw( $VERSION $DEBUG $ERROR $AUTOLOAD );
use Text::Wrap;
$VERSION = sprintf("%d.%02d", q$Revision: 1.6 $ =~ /(\d+)\.(\d+)/);
$DEBUG = 0 unless defined $DEBUG;
my $HTML_PROTECT = 0;
my @OVER;
sub new {
my $class = shift;
my $self = $class->SUPER::new(@_)
|| return;
# initalise stack for maintaining info for nested lists
$self->{ OVER } = [];
return $self;
}
sub view {
my ($self, $type, $item) = @_;
if ($type =~ s/^seq_//) {
return $item;
}
elsif (UNIVERSAL::isa($item, 'HASH')) {
if (defined $item->{ content }) {
return $item->{ content }->present($self);
}
elsif (defined $item->{ text }) {
my $text = $item->{ text };
return ref $text ? $text->present($self) : $text;
}
else {
return '';
}
}
elsif (! ref $item) {
return $item;
}
else {
return '';
}
}
sub view_pod {
my ($self, $pod) = @_;
return "<html>\n<body bgcolor=\"#ffffff\">\n"
. $pod->content->present($self)
. "</body>\n</html>\n";
}
sub view_head1 {
my ($self, $head1) = @_;
my $title = $head1->title->present($self);
return "<h1>$title</h1>\n\n"
. $head1->content->present($self);
}
sub view_head2 {
my ($self, $head2) = @_;
my $title = $head2->title->present($self);
return "<h2>$title</h2>\n"
. $head2->content->present($self);
}
sub view_head3 {
my ($self, $head3) = @_;
my $title = $head3->title->present($self);
return "<h3>$title</h3>\n"
. $head3->content->present($self);
}
sub view_head4 {
my ($self, $head4) = @_;
my $title = $head4->title->present($self);
return "<h4>$title</h4>\n"
. $head4->content->present($self);
}
sub view_over {
my ($self, $over) = @_;
my ($start, $end, $strip);
my $items = $over->item();
if (@$items) {
my $first_title = $items->[0]->title();
if ($first_title =~ /^\s*\*\s*/) {
# '=item *' => <ul>
$start = "<ul>\n";
$end = "</ul>\n";
$strip = qr/^\s*\*\s*/;
}
elsif ($first_title =~ /^\s*\d+\.?\s*/) {
# '=item 1.' or '=item 1 ' => <ol>
$start = "<ol>\n";
$end = "</ol>\n";
$strip = qr/^\s*\d+\.?\s*/;
}
else {
$start = "<ul>\n";
$end = "</ul>\n";
$strip = '';
}
my $overstack = ref $self ? $self->{ OVER } : \@OVER;
push(@$overstack, $strip);
my $content = $over->content->present($self);
pop(@$overstack);
return $start
. $content
. $end;
}
else {
return "<blockquote>\n"
. $over->content->present($self)
. "</blockquote>\n";
}
}
sub view_item {
my ($self, $item) = @_;
my $over = ref $self ? $self->{ OVER } : \@OVER;
my $title = $item->title();
my $strip = $over->[-1];
if (defined $title) {
$title = $title->present($self) if ref $title;
$title =~ s/$strip// if $strip;
if (length $title) {
my $anchor = $title;
$anchor =~ s/^\s*|\s*$//g; # strip leading and closing spaces
$anchor =~ s/\W/_/g;
$title = qq{<a name="item_$anchor"></a><b>$title</b>};
}
}
return '<li>'
. "$title\n"
. $item->content->present($self)
. "</li>\n";
}
sub view_for {
my ($self, $for) = @_;
return '' unless $for->format() =~ /\bhtml\b/;
return $for->text()
. "\n\n";
}
sub view_begin {
my ($self, $begin) = @_;
return '' unless $begin->format() =~ /\bhtml\b/;
$HTML_PROTECT++;
my $output = $begin->content->present($self);
$HTML_PROTECT--;
return $output;
}
sub view_textblock {
my ($self, $text) = @_;
return $HTML_PROTECT ? "$text\n" : "<p>$text</p>\n";
}
sub view_verbatim {
my ($self, $text) = @_;
for ($text) {
s/&/&amp;/g;
s/</&lt;/g;
s/>/&gt;/g;
}
return "<pre>$text</pre>\n\n";
}
sub view_seq_bold {
my ($self, $text) = @_;
return "<b>$text</b>";
}
sub view_seq_italic {
my ($self, $text) = @_;
return "<i>$text</i>";
}
sub view_seq_code {
my ($self, $text) = @_;
return "<code>$text</code>";
}
sub view_seq_file {
my ($self, $text) = @_;
return "<i>$text</i>";
}
sub view_seq_space {
my ($self, $text) = @_;
$text =~ s/\s/&nbsp;/g;
return $text;
}
sub view_seq_entity {
my ($self, $entity) = @_;
return "&$entity;"
}
sub view_seq_index {
return '';
}
sub view_seq_link {
my ($self, $link) = @_;
# view_seq_text has already taken care of L<http://example.com/>
if ($link =~ /^<a href=/ ) {
return $link;
}
# full-blown URL's are emitted as-is
if ($link =~ m{^\w+://}s ) {
return make_href($link);
}
$link =~ s/\n/ /g; # undo line-wrapped tags
my $orig_link = $link;
my $linktext;
# strip the sub-title and the following '|' char
if ( $link =~ s/^ ([^|]+) \| //x ) {
$linktext = $1;
}
# make sure sections start with a /
$link =~ s|^"|/"|;
my $page;
my $section;
if ($link =~ m|^ (.*?) / "? (.*?) "? $|x) { # [name]/"section"
($page, $section) = ($1, $2);
}
elsif ($link =~ /\s/) { # this must be a section with missing quotes
($page, $section) = ('', $link);
}
else {
($page, $section) = ($link, '');
}
# warning; show some text.
$linktext = $orig_link unless defined $linktext;
my $url = '';
if (defined $page && length $page) {
$url = $self->view_seq_link_transform_path($page);
}
# append the #section if exists
$url .= "#$section" if defined $url and
defined $section and length $section;
return make_href($url, $linktext);
}
# should be sub-classed if extra transformations are needed
#
# for example a sub-class may search for the given page and return a
# relative path to it.
#
# META: where this functionality should be documented? This module
# doesn't have docs section
#
sub view_seq_link_transform_path {
my($self, $page) = @_;
# right now the default transform doesn't check whether the link
# is not dead (i.e. whether there is a corresponding file.
# therefore we don't link L<>'s other than L<http://>
# subclass to change the default (and of course add validation)
# this is the minimal transformation that will be required if enabled
# $page = "$page.html";
# $page =~ s|::|/|g;
#print "page $page\n";
return undef;
}
sub make_href {
my($url, $title) = @_;
if (!defined $url) {
return defined $title ? "<i>$title</i>" : '';
}
$title = $url unless defined $title;
#print "$url, $title\n";
return qq{<a href="$url">$title</a>};
}
# this code has been borrowed from Pod::Html
my $urls = '(' . join ('|',
qw{
http
telnet
mailto
news
gopher
file
wais
ftp
} ) . ')';
my $ltrs = '\w';
my $gunk = '/#~:.?+=&%@!\-';
my $punc = '.:!?\-;';
my $any = "${ltrs}${gunk}${punc}";
sub view_seq_text {
my ($self, $text) = @_;
unless ($HTML_PROTECT) {
for ($text) {
s/&/&amp;/g;
s/</&lt;/g;
s/>/&gt;/g;
}
}
$text =~ s{
\b # start at word boundary
( # begin $1 {
$urls : # need resource and a colon
(?!:) # Ignore File::, among others.
[$any] +? # followed by one or more of any valid
# character, but be conservative and
# take only what you need to....
) # end $1 }
(?= # look-ahead non-consumptive assertion
[$punc]* # either 0 or more punctuation followed
(?: # followed
[^$any] # by a non-url char
| # or
$ # end of the string
) #
| # or else
$ # then end of the string
)
}{<a href="$1">$1</a>}igox;
return $text;
}
sub encode {
my($self,$text) = @_;
require Encode;
return Encode::encode("ascii",$text,Encode::FB_XMLCREF());
}
1;
=head1 NAME
Pod::POM::View::HTML
=head1 DESCRIPTION
HTML view of a Pod Object Model.
=head1 METHODS
=over 4
=item C<view($self, $type, $item)>
=item C<view_pod($self, $pod)>
=item C<view_head1($self, $head1)>
=item C<view_head2($self, $head2)>
=item C<view_head3($self, $head3)>
=item C<view_head4($self, $head4)>
=item C<view_over($self, $over)>
=item C<view_item($self, $item)>
=item C<view_for($self, $for)>
=item C<view_begin($self, $begin)>
=item C<view_textblock($self, $textblock)>
=item C<view_verbatim($self, $verbatim)>
=item C<view_meta($self, $meta)>
=item C<view_seq_bold($self, $text)>
Returns the text of a C<BE<lt>E<gt>> sequence enclosed in a C<E<lt>b<E<gt>> element.
=item C<view_seq_italic($self, $text)>
Returns the text of a C<IE<lt>E<gt>> sequence enclosed in a C<E<lt>i<E<gt>> element.
=item C<view_seq_code($self, $text)>
Returns the text of a C<CE<lt>E<gt>> sequence enclosed in a C<E<lt>code<E<gt>> element.
=item C<view_seq_file($self, $text)>
=item C<view_seq_entity($self, $text)>
=item C<view_seq_index($self, $text)>
Returns an empty string. Index sequences are suppressed in HTML view.
=item C<view_seq_link($self, $text)>
=back
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2000 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
POD_POM_VIEW_HTML
$fatpacked{"Pod/POM/View/Pod.pm"} = <<'POD_POM_VIEW_POD';
#============================================================= -*-Perl-*-
#
# Pod::POM::View::Pod
#
# DESCRIPTION
# Pod view of a Pod Object Model.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
#
# COPYRIGHT
# Copyright (C) 2000 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Pod.pm 77 2009-08-20 20:44:14Z ford $
#
#========================================================================
package Pod::POM::View::Pod;
require 5.004;
use strict;
use Pod::POM::Nodes;
use Pod::POM::View;
use parent qw( Pod::POM::View );
use vars qw( $VERSION $DEBUG $ERROR $AUTOLOAD $MARKUP );
$VERSION = sprintf("%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/);
$DEBUG = 0 unless defined $DEBUG;
# create reverse lookup table mapping method name to original sequence
$MARKUP = {
map { ( $Pod::POM::Node::Sequence::NAME{ $_ } => $_ ) }
keys %Pod::POM::Node::Sequence::NAME,
};
sub view {
my ($self, $type, $item) = @_;
# my ($pkg, $file, $line) = caller;
# print STDERR "called view ($type) from $file line $line\n";
if ($type =~ s/^seq_//) {
if ($type eq 'text') {
return "$item";
}
if ($type = $MARKUP->{ $type }) {
if ($item =~ /[<>]/) {
return "$type<< $item >>";
}
else {
return "$type<$item>";
}
}
}
elsif (ref $item eq 'HASH') {
if (defined $item->{ content }) {
return $item->{ content }->present($self);
}
elsif (defined $item->{ text }) {
my $text = $item->{ text };
return ref $text ? $text->present($self) : $text;
}
else {
return '';
}
}
elsif (! ref $item) {
return $item;
}
else {
return '';
}
}
sub view_pod {
my ($self, $pod) = @_;
# return "=pod\n\n" . $pod->content->present($self) . "=cut\n\n";
return $pod->content->present($self);
}
sub view_head1 {
my ($self, $head1) = @_;
return '=head1 '
. $head1->title->present($self)
. "\n\n"
. $head1->content->present($self);
}
sub view_head2 {
my ($self, $head2) = @_;
return '=head2 '
. $head2->title->present($self)
. "\n\n"
. $head2->content->present($self);
}
sub view_head3 {
my ($self, $head3) = @_;
return '=head3 '
. $head3->title->present($self)
. "\n\n"
. $head3->content->present($self);
}
sub view_head4 {
my ($self, $head4) = @_;
return '=head4 '
. $head4->title->present($self)
. "\n\n"
. $head4->content->present($self);
}
sub view_over {
my ($self, $over) = @_;
return '=over '
. $over->indent()
. "\n\n"
. $over->content->present($self)
. "=back\n\n";
}
sub view_item {
my ($self, $item) = @_;
my $title = $item->title();
$title = $title->present($self) if ref $title;
return "=item $title\n\n"
. $item->content->present($self);
}
sub view_for {
my ($self, $for) = @_;
return '=for '
. $for->format . ' '
. $for->text()
. "\n\n"
. $for->content->present($self);
}
sub view_begin {
my ($self, $begin) = @_;
return '=begin '
. $begin->format()
. "\n\n"
. $begin->content->present($self)
. "=end "
. $begin->format()
. "\n\n";
}
sub view_textblock {
my ($self, $text) = @_;
return "$text\n\n";
}
sub view_verbatim {
my ($self, $text) = @_;
return "$text\n\n";
}
sub view_meta {
my ($self, $meta) = @_;
return '=meta '
. $meta->name()
. "\n\n"
. $meta->content->present($self)
. "=end\n\n";
}
1;
=head1 NAME
Pod::POM::View::Pod
=head1 DESCRIPTION
Pod view of a Pod Object Model.
=head1 METHODS
=over 4
=item C<view($self, $type, $item)>
=item C<view_pod($self, $pod)>
=item C<view_head1($self, $head1)>
=item C<view_head2($self, $head2)>
=item C<view_head3($self, $head3)>
=item C<view_head4($self, $head4)>
=item C<view_over($self, $over)>
=item C<view_item($self, $item)>
=item C<view_for($self, $for)>
=item C<view_begin($self, $begin)>
=item C<view_textblock($self, $textblock)>
=item C<view_verbatim($self, $verbatim)>
=item C<view_meta($self, $meta)>
=back
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2000 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
POD_POM_VIEW_POD
$fatpacked{"Pod/POM/View/Restructured.pm"} = <<'POD_POM_VIEW_RESTRUCTURED';
# Original authors: don
# $Revision: 1595 $
# Copyright (c) 2010 Don Owens <don@regexguy.com>. All rights reserved.
#
# This is free software; you can redistribute it and/or modify it under
# the Perl Artistic license. You should have received a copy of the
# Artistic license with this distribution, in the file named
# "Artistic". You may also obtain a copy from
# http://regexguy.com/license/Artistic
#
# This program is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE.
=pod
=head1 NAME
Pod::POM::View::Restructured - View for Pod::POM that outputs reStructuredText
=head1 SYNOPSIS
use Pod::POM::View::Restructured;
my $view = Pod::POM::View::Restructured->new;
my $parser = Pod::POM->new;
my $pom = $parser->parse_file("$top_dir/lib/Pod/POM/View/Restructured.pm");
my $out = $pom->present($view);
=head1 DESCRIPTION
This module outputs reStructuredText that is expected to be used
with Sphinx. Verbatim sections (indented paragraphs) in the POD
will be output with syntax hilighting for Perl code by default.
See L</"POD commands specifically for reStructuredText"> for how
to change this for a particular block.
For a list of changes in recent versions, see the documentation
for L<Pod::POM::View::Restructured::Changes>.
This module can be downloaded from L<http://www.cpan.org/authors/id/D/DO/DOWENS/>.
=cut
use strict;
use warnings;
use Data::Dumper ();
use Pod::POM;
package Pod::POM::View::Restructured;
our $VERSION = '0.02'; # change in POD below!
use base 'Pod::POM::View::Text';
=pod
=head1 METHODS
=head2 C<new(\%params)>
Constructor. \%params is optional. If present, the following keys are valid:
=over 4
=item C<callbacks>
See documentation below for C<convert_file()>.
=back
=cut
sub new {
my ($class, $params) = @_;
$params = { } unless $params and UNIVERSAL::isa($params, 'HASH');
my $self = bless { seen_something => 0, title_set => 0, params => { } }, ref($class) || $class;
my $callbacks = $params->{callbacks};
$callbacks = { } unless $callbacks;
$self->{callbacks} = $callbacks;
return $self;
}
=pod
=head2 C<convert_file($source_file, $title, $dest_file, $callbacks)>
Converts the POD in C<$source_file> to reStructuredText. If
C<$dest_file> is defined, it writes the output there. If
C<$title> is defined, it is used for the title of the document.
Otherwise, an attempt is made to infer the title from the NAME
section (checks if the body looks like C</\A\s*(\w+(?:::\w+)+)\s+-\s+/s>).
Returns the output as a string.
C<$source_file> and C<$dest_file> can be either file names or file
handles.
=cut
sub convert_file {
my ($self, $source_file, $title, $dest_file, $callbacks) = @_;
my $cb;
if ($callbacks) {
$cb = { %{ $self->{callbacks} }, %$callbacks };
}
else {
$cb = $self->{callbacks};
}
my $view = Pod::POM::View::Restructured->new({ callbacks => $cb });
my $parser = Pod::POM->new;
unless (-r $source_file) {
warn "can't read source file $source_file";
return undef;
}
my $pom = $parser->parse_file($source_file);
$view->{title_set} = 1 if defined($title);
my $out = $pom->present($view);
if (defined($title)) {
$out = $self->_build_header($title, '#', 1) . "\n" . $out;
}
else {
$title = $view->{title};
}
if (defined($dest_file) and $dest_file ne '') {
my $out_fh;
if (UNIVERSAL::isa($dest_file, 'GLOB')) {
$out_fh = $dest_file;
}
else {
unless (open($out_fh, '>', $dest_file)) {
warn "couldn't open output file $dest_file";
return undef;
}
}
print $out_fh $out;
close $out_fh;
}
my $rv = { content => $out, title => $title };
return $rv;
}
=pod
=head2 C<convert_files($file_spec, $index_file, $index_title, $out_dir)>
Converts the files given in C<$file_spec> to reStructuredText.
If C<$index_file> is provided, it is the path to the index file
to be created (with a table of contents pointing to all of the
files created). If C<$index_title> is provided, it is used as
the section title for the index file. C<$out_dir> is the
directory the generated files will be written to.
C<$file_spec> is a reference to an array of hashes specifying
attributes for each file to be converted. The valid keys are:
=over 4
=item C<source_file>
File to convert.
=item C<dest_file>
File to output the reStructuredText. If not provided, a file
name will be generated based on the title.
=item C<title>
Section title for the generated reStructuredText. If not
provided, an attempt will be made to infer the title from the
NAME section in the POD, if it exists. As a last resort, a title
will be generated that looks like "section_(\d+)".
=item C<callbacks>
A reference to a hash containing names and the corresponding callbacks.
Currently the only valid callback is C<link>. It is given the
text inside a LE<lt>E<gt> section from the POD, and is expected to return a
tuple C<($url, $label)>. If the value returned for C<$label> is
undefined, the value of C<$url> is used as the label.
=item C<no_toc>
Causes the item to not be printed to the index or return in the C<toc> field.
=back
This method returns a hash ref with a table of contents (the
C<toc> field) suitable for a reStructuredText table of contents.
E.g.,
my $conv = Pod::POM::View::Restructured->new;
my $files = [
{ source_file => "$base_dir/Restructured.pm" },
{ source_file => "$base_dir/DWIW.pm" },
{ source_file => "$base_dir/Wrapper.pm" },
];
my $rv = $conv->convert_files($files, "$dest_dir/index.rst", 'My Big Test', $dest_dir);
=cut
sub convert_files {
my ($self, $file_spec, $index_file, $index_title, $out_dir) = @_;
my $index_fh = $self->_get_file_handle($index_file, '>');
if ($index_fh and defined($index_title) and $index_title ne '') {
my $header = $self->_build_header($index_title, '#', 1);
# my $line = '#' x length($index_title);
# my $header = $line . "\n" . $index_title . "\n" . $line . "\n\n";
print $index_fh $header;
print $index_fh "\nContents:\n\n";
print $index_fh ".. toctree::\n";
print $index_fh " :maxdepth: 1\n\n";
}
my $count = 0;
my $toc = '';
foreach my $spec (@$file_spec) {
$count++;
my $data = $self->convert_file($spec->{source_file}, $spec->{title},
$spec->{dest_file}, $spec->{callbacks});
my $this_title = $data->{title};
# print STDERR Data::Dumper->Dump([ $this_title ], [ 'this_title' ]) . "\n\n";
unless (defined($this_title) and $this_title !~ /\A\s*\Z/) {
$this_title = 'section_' . $count;
}
my $name = $spec->{dest_file};
if (defined($name)) {
$name =~ s/\.rst\Z//;
}
else {
($name = $this_title) =~ s/\W/_/g;
my $dest_file = $out_dir . '/' . $name . '.rst';
my $out_fh;
unless (open($out_fh, '>', $dest_file)) {
warn "couldn't open output file $dest_file";
return undef;
}
print $out_fh $data->{content};
close $out_fh;
}
unless ($spec->{no_toc}) {
$toc .= ' ' . $name . "\n";
}
if ($index_fh and not $spec->{no_toc}) {
print $index_fh " " . $name . "\n";
}
}
if ($index_fh) {
print $index_fh "\n";
}
return { toc => $toc };
}
sub _get_file_handle {
my ($self, $file, $mode) = @_;
return undef unless defined $file;
if (ref($file) and UNIVERSAL::isa($file, 'GLOB')) {
return $file;
}
$mode = '<' unless $mode;
my $fh;
if ($file ne '') {
unless (open($fh, $mode, $file)) {
warn "couldn't open input file $file: $!";
return undef;
}
}
return $fh;
}
sub view_pod {
my ($self, $node) = @_;
my $content = ".. highlight:: perl\n\n";
return $content . $node->content()->present($self);
}
sub _generic_head {
my ($self, $node, $marker, $do_overline) = @_;
return scalar($self->_generic_head_multi($node, $marker, $do_overline));
}
sub _generic_head_multi {
my ($self, $node, $marker, $do_overline) = @_;
my $title = $node->title()->present($self);
my $content = $node->content()->present($self);
$title = ' ' if $title eq '';
# my $section_line = $marker x length($title);
my $section = $self->_build_header($title, $marker, $do_overline) . "\n" . $content;
# my $section = $title . "\n" . $section_line . "\n\n" . $content;
# if ($do_overline) {
# $section = $section_line . "\n" . $section;
# }
$section .= "\n";
return wantarray ? ($section, $content, $title) : $section;
}
sub _build_header {
my ($self, $text, $marker, $do_overline) = @_;
my $line = $marker x length($text);
my $header = $text . "\n" . $line . "\n";
if ($do_overline) {
$header = $line . "\n" . $header;
}
return "\n" . $header;
}
sub _do_indent {
my ($self, $text, $indent_amount, $dbg) = @_;
my $indent = ' ' x $indent_amount;
# $indent = "'$dbg" . $indent . "'";
my @lines = split /\n/, $text, -1;
foreach my $line (@lines) {
$line = $indent . $line;
}
return join("\n", @lines);
}
sub view_head1 {
my ($self, $node) = @_;
my ($section, $content, $title) = $self->_generic_head_multi($node, '*', 1);
unless ($self->{seen_something} or $self->{title_set}) {
if ($title eq 'NAME') {
$self->{seen_something} = 1;
if ($content =~ /\A\s*(\w+(?:::\w+)+)\s+-\s+/s) {
my $mod_name = $1;
$self->{module_name} = $mod_name;
$self->{title} = $mod_name;
$self->{title_set} = 1;
$section = $self->_build_header($mod_name, '#', 1) . $section;
# my $line = '#' x length($mod_name);
# $section = $line . "\n" . $mod_name . "\n" . $line . "\n\n" . $section;
}
return $section;
}
}
$self->{seen_something} = 1;
return $section;
}
sub view_head2 {
my ($self, $node) = @_;
$self->{seen_something} = 1;
return $self->_generic_head($node, '=');
}
sub view_head3 {
my ($self, $node) = @_;
$self->{seen_something} = 1;
return $self->_generic_head($node, '-');
}
sub view_head4 {
my ($self, $node) = @_;
$self->{seen_something} = 1;
return $self->_generic_head($node, '^');
}
sub view_item {
my ($self, $node) = @_;
$self->{seen_something} = 1;
my $title = $node->title()->present($self);
my $content = $node->content()->present($self);
$title =~ s/\A\s+//;
$title =~ s/\n/ /;
# $content =~ s/\n/\n /g;
# $content = ' ' . $content;
$self->{view_item_count}++;
$content = $self->_do_indent($content, 1, "[[view_item_$self->{view_item_count}]]");
return "\n" . $title . "\n" . $content . "\n\n";
}
sub view_over {
my ($self, $node) = @_;
my $content = $node->content()->present($self);
# my $indent = $node->indent();
return "\n" . $content;
}
sub view_text {
my ($self, $node) = @_;
my @lines = split /\n/, $node;
foreach my $line (@lines) {
$line =~ s/\A\s+//;
}
return join("\n", @lines);
}
sub view_textblock {
my ($self, $text) = @_;
return "\n" . $text . "\n";
}
sub view_verbatim {
my ($self, $node) = @_;
# (my $node_part = ' ' . $node) =~ s/\n/\n /g;
my $node_part = $self->_do_indent($node . '', 1, '[[view_verbatim]]');
my $block_part = ".. code-block:: perl\n\n";
if (defined($self->{next_code_block})) {
my $lang = $self->{next_code_block};
delete $self->{next_code_block};
if ($lang eq 'none') {
# FIXME: need to output a preformatted paragraph here, but no highlighting
$block_part = '';
}
else {
$block_part = ".. code-block:: $lang\n\n";
}
}
my $content = $block_part . $node_part;
return "\n\n" . $content . "\n\n";
}
sub view_for {
my ($self, $node) = @_;
my $fmt = $node->format();
# print STDERR "got for: fmt='$fmt', text='" . $node->text() . "'\n";
if ($fmt eq 'pod2rst') {
my $text = $node->text();
if ($text =~ /\A\s*next-code-block\s*:\s*(\S+)/) {
my $lang = $1;
$self->{next_code_block} = $lang;
return '';
}
return '';
}
return $self->SUPER::view_for($node);
}
sub view_seq_code {
my ($self, $text) = @_;
return '\ ``' . $text . '``\ ';
}
sub view_seq_bold {
my ($self, $text) = @_;
$text =~ s/\*/\\*/g;
$text =~ s/\`/\\`/g;
return '\ **' . $text . '**\ ';
}
sub view_seq_italic {
my ($self, $text) = @_;
$text =~ s/\*/\\*/g;
$text =~ s/\`/\\`/g;
return '\ *' . $text . '*\ ';
}
sub view_seq_file {
my ($self, $text) = @_;
$text =~ s/\*/\\*/g;
$text =~ s/\`/\\`/g;
return '\ *' . $text . '*\ ';
}
sub view_seq_text {
my ($self, $node) = @_;
my $text = $node . '';
$text =~ s/\*/\\*/g;
$text =~ s/\`/\\`/g;
return $text;
}
sub view_seq_zero {
return '';
}
sub view_seq_link {
my ($self, $text) = @_;
# FIXME: determine if has label, if manpage, etc., and pass that info along to the callback,
# instead of just the text, e.g.,
# $link_cb->($label, $name, $sec, $url);
my $link_cb = $self->{callbacks}{link};
if ($link_cb) {
my ($url, $label) = $link_cb->($text);
if (defined($url)) {
if ($url eq '' and defined($label) and $label ne '') {
$text = $label;
}
elsif (defined($label) and $label ne '') {
$text = qq{`$label <$url>`_};
}
else {
$text = qq{`$url <$url>`_};
}
return $text;
}
}
if ($text =~ m{\A/(.+)}) {
(my $section = $1) =~ s/\A"(.+)"/$1/;
$text = qq{`$section`_};
}
elsif ($text =~ m{\Ahttps?://}) {
$text = qq{`$text <$text>`_};
}
elsif ($text =~ /::/) {
my $label = $text;
my $module = $text;
if ($text =~ /\A(.+?)\|(.+::.+)/) {
$label = $1;
$module = $2;
}
$module = $self->_url_encode($module);
my $url = "http://search.cpan.org/search?query=$module&mode=module";
$text = qq{`$label <$url>`_};
}
return $text;
}
sub _url_encode {
my ($self, $str) = @_;
use bytes;
$str =~ s{([^A-Za-z0-9_])}{sprintf("%%%02x", ord($1))}eg;
return $str;
}
=pod
=head1 POD commands specifically for reStructuredText
The following sequences can be used in POD to request actions specifically for this module.
=head2 =Z<>for pod2rst next-code-block: I<lang>
This sets up the next verbatim section, i.e., the next indented
paragraph to be hilighted according to the syntax of the
programming/markup/config language I<lang>. Verbatim sections
are assumed to be Perl code by default. Sphinx uses Pygments to
do syntax hilighting in these sections, so you can use any value
for I<lang> that Pygments supports, e.g., Python, C, C++,
Javascript, SQL, etc.
=head1 EXAMPLES
=over 4
=item Converting a single file using C<pod2rst>
=for pod2rst next-code-block: bash
pod2rst --infile=Restructured.pm --outfile=restructured.rst
=back
B<Need to document:>
=over 4
=item B<Document example of setting up sphinx build, generating rst from pod, and building>
=back
=head1 TODO
=over 4
=item code hilighting
Currently, a verbatim block (indented paragraph) gets output as a
Perl code block by default in reStructuredText. There should be
an option (e.g., in the constructor) to change the language for
hilighting purposes (for all verbatim blocks), or disable syntax
hilighting and just make it a preformatted paragraph. There is a
way to do this in POD (see L</"POD commands specifically for reStructuredText">),
but there should also be an option in the constructor.
=item improve escaping
Text blocks are not escaped properly, so it is currently possible
to invoke a command in reStructuredText by accident.
=back
=head1 DEPENDENCIES
Inherits from L<Pod::POM::View::Text> that comes with the Pod::POM distribution.
=head1 AUTHOR
Don Owens <don@regexguy.com>
=head1 LICENSE AND COPYRIGHT
Copyright (c) 2010 Don Owens <don@regexguy.com>. All rights reserved.
This is free software; you can redistribute it and/or modify it
under the same terms as Perl itself. See perlartistic.
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
=head1 SEE ALSO
L<Pod::POM>
L<Pod::POM::View::HTML>
L<pod2rst> (distributed with Pod::POM::View::HTML)
reStructuredText: L<http://docutils.sourceforge.net/rst.html>
Sphinx (uses reStructuredText): L<http://sphinx.pocoo.org/>
Pygments (used by Sphinx for syntax highlighting): L<http://pygments.org/>
=head1 VERSION
0.02
=cut
1;
# Local Variables: #
# mode: perl #
# tab-width: 4 #
# indent-tabs-mode: nil #
# cperl-indent-level: 4 #
# perl-indent-level: 4 #
# End: #
# vim:set ai si et sta ts=4 sw=4 sts=4:
POD_POM_VIEW_RESTRUCTURED
$fatpacked{"Pod/POM/View/Restructured/Changes.pm"} = <<'POD_POM_VIEW_RESTRUCTURED_CHANGES';
# Original authors: don
# $Revision: $
=pod
=head1 NAME
Pod::POM::View::Restructured::Changes - List of major changes in Pod::POM::View::Restructured
=head1 CHANGES
=head2 Version 0.02
=over 4
=item Added documentation for changes.
=item Added C<callbacks> option.
=item Added C<no_toc> option.
=item Fixed bug encountered when no index is being output.
=item Fixed section links.
=back
=head2 Version 0.01
=over 4
=item Initial release.
=back
=cut
1;
POD_POM_VIEW_RESTRUCTURED_CHANGES
$fatpacked{"Pod/POM/View/Text.pm"} = <<'POD_POM_VIEW_TEXT';
#============================================================= -*-Perl-*-
#
# Pod::POM::View::Text
#
# DESCRIPTION
# Text view of a Pod Object Model.
#
# AUTHOR
# Andy Wardley <abw@kfs.org>
#
# COPYRIGHT
# Copyright (C) 2000 Andy Wardley. All Rights Reserved.
#
# This module is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# REVISION
# $Id: Text.pm 77 2009-08-20 20:44:14Z ford $
#
#========================================================================
package Pod::POM::View::Text;
require 5.004;
use strict;
use Pod::POM::View;
use parent qw( Pod::POM::View );
use vars qw( $VERSION $DEBUG $ERROR $AUTOLOAD $INDENT );
use Text::Wrap;
$VERSION = sprintf("%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/);
$DEBUG = 0 unless defined $DEBUG;
$INDENT = 0;
sub new {
my $class = shift;
my $args = ref $_[0] eq 'HASH' ? shift : { @_ };
bless {
INDENT => 0,
%$args,
}, $class;
}
sub view {
my ($self, $type, $item) = @_;
if ($type =~ s/^seq_//) {
return $item;
}
elsif (UNIVERSAL::isa($item, 'HASH')) {
if (defined $item->{ content }) {
return $item->{ content }->present($self);
}
elsif (defined $item->{ text }) {
my $text = $item->{ text };
return ref $text ? $text->present($self) : $text;
}
else {
return '';
}
}
elsif (! ref $item) {
return $item;
}
else {
return '';
}
}
sub view_head1 {
my ($self, $head1) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
local $Text::Wrap::unexpand = 0;
my $title = wrap($pad, $pad,
$head1->title->present($self));
$$indent += 4;
my $output = "$title\n" . $head1->content->present($self);
$$indent -= 4;
return $output;
}
sub view_head2 {
my ($self, $head2) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
local $Text::Wrap::unexpand = 0;
my $title = wrap($pad, $pad,
$head2->title->present($self));
$$indent += 4;
my $output = "$title\n" . $head2->content->present($self);
$$indent -= 4;
return $output;
}
sub view_head3 {
my ($self, $head3) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
local $Text::Wrap::unexpand = 0;
my $title = wrap($pad, $pad,
$head3->title->present($self));
$$indent += 4;
my $output = "$title\n" . $head3->content->present($self);
$$indent -= 4;
return $output;
}
sub view_head4 {
my ($self, $head4) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
local $Text::Wrap::unexpand = 0;
my $title = wrap($pad, $pad,
$head4->title->present($self));
$$indent += 4;
my $output = "$title\n" . $head4->content->present($self);
$$indent -= 4;
return $output;
}
#------------------------------------------------------------------------
# view_over($self, $over)
#
# Present an =over block - this is a blockquote if there are no =items
# within the block.
#------------------------------------------------------------------------
sub view_over {
my ($self, $over) = @_;
if (@{$over->item}) {
return $over->content->present($self);
}
else {
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
$$indent += 4;
my $content = $over->content->present($self);
$$indent -= 4;
return $content;
}
}
sub view_item {
my ($self, $item) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
local $Text::Wrap::unexpand = 0;
my $title = wrap($pad . '* ', $pad . ' ',
$item->title->present($self));
$$indent += 2;
my $content = $item->content->present($self);
$$indent -= 2;
return "$title\n\n$content";
}
sub view_for {
my ($self, $for) = @_;
return '' unless $for->format() =~ /\btext\b/;
return $for->text()
. "\n\n";
}
sub view_begin {
my ($self, $begin) = @_;
return '' unless $begin->format() =~ /\btext\b/;
return $begin->content->present($self);
}
sub view_textblock {
my ($self, $text) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
$text =~ s/\s+/ /mg;
$$indent ||= 0;
my $pad = ' ' x $$indent;
local $Text::Wrap::unexpand = 0;
return wrap($pad, $pad, $text) . "\n\n";
}
sub view_verbatim {
my ($self, $text) = @_;
my $indent = ref $self ? \$self->{ INDENT } : \$INDENT;
my $pad = ' ' x $$indent;
$text =~ s/^/$pad/mg;
return "$text\n\n";
}
sub view_seq_bold {
my ($self, $text) = @_;
return "*$text*";
}
sub view_seq_italic {
my ($self, $text) = @_;
return "_${text}_";
}
sub view_seq_code {
my ($self, $text) = @_;
return "'$text'";
}
sub view_seq_file {
my ($self, $text) = @_;
return "_${text}_";
}
my $entities = {
gt => '>',
lt => '<',
amp => '&',
quot => '"',
};
sub view_seq_entity {
my ($self, $entity) = @_;
return $entities->{ $entity } || $entity;
}
sub view_seq_index {
return '';
}
sub view_seq_link {
my ($self, $link) = @_;
if ($link =~ s/^.*?\|//) {
return $link;
}
else {
return "the $link manpage";
}
}
1;
=head1 NAME
Pod::POM::View::Text
=head1 DESCRIPTION
Text view of a Pod Object Model.
=head1 METHODS
=over 4
=item C<view($self, $type, $item)>
=item C<view_pod($self, $pod)>
=item C<view_head1($self, $head1)>
=item C<view_head2($self, $head2)>
=item C<view_head3($self, $head3)>
=item C<view_head4($self, $head4)>
=item C<view_over($self, $over)>
=item C<view_item($self, $item)>
=item C<view_for($self, $for)>
=item C<view_begin($self, $begin)>
=item C<view_textblock($self, $textblock)>
=item C<view_verbatim($self, $verbatim)>
=item C<view_meta($self, $meta)>
=item C<view_seq_bold($self, $text)>
Returns the text of a C<BE<lt>E<gt>> sequence in 'bold' (i.e. surrounded by asterisks, like *this*).
=item C<view_seq_italic($self, $text)>
Returns the text of a C<IE<lt>E<gt>> sequence in 'italics' (i.e. surrounded by underscores, like _this_).
=item C<view_seq_code($self, $text)>
=item C<view_seq_file($self, $text)>
=item C<view_seq_entity($self, $text)>
=item C<view_seq_index($self, $text)>
Returns an empty string. Index sequences are suppressed in text view.
=item C<view_seq_link($self, $text)>
=back
=head1 AUTHOR
Andy Wardley E<lt>abw@kfs.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2000 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
POD_POM_VIEW_TEXT
s/^ //mg for values %fatpacked;
unshift @INC, sub {
if (my $fat = $fatpacked{$_[1]}) {
if ($] < 5.008) {
return sub {
return 0 unless length $fat;
$fat =~ s/^([^\n]*\n?)//;
$_ = $1;
return 1;
};
}
open my $fh, '<', \$fat
or die "FatPacker error loading $_[1] (could be a perl installation issue?)";
return $fh;
}
return
};
} # END OF FATPACK CODE
#!/usr/bin/env perl
use 5.010; # for \K
use strict;
use warnings;
use English qw(-no_match_vars);
use IO::File;
use File::Basename qw(basename);
use Pod::POM::View::Restructured;
my $input_file = shift @ARGV or die "Need an input file";
my $nofix = scalar @ARGV;
my $tool = basename($input_file);
open my $in_fh, q{<:encoding(UTF-8)}, $input_file
or die "Cannot open $input_file: $!";
open my $out_fh, q{>}, \my $out;
my $conv = Pod::POM::View::Restructured->new();
my $output = $conv->convert_file($in_fh, undef, $out_fh, { link => \&format_links });
close $in_fh;
close $out_fh;
if (!defined($output)) {
die "Failed to convert!";
}
my $header =
".. program:: $tool\n\n" .
('=' x (length($tool) + 11)) . "\n" .
":program:`$tool`\n" .
('=' x (length($tool) + 11)) . "\n\n";
open my $in, q{<:encoding(UTF-8)}, \$out;
local $INPUT_RECORD_SEPARATOR = '';
my $in_code_block = 0;
my $section = '';
my $fixed_output = '';
while (my $para = <$in>) {
if ( $nofix ) {
$fixed_output .= $para;
next;
}
next if $para =~ m/^\.\. highlight:: perl/;
$in_code_block = $para =~ m/^\s{2,}/ ? 1 : 0;
if ($para =~ m/^\*{2,}\n([\w\s,-]+)\n\*{2,}$/m) {
$fixed_output .= "$1\n" .
('=' x length $1) .
"\n\n";
$section = $1;
}
elsif ($para =~ m/^Usage: /) {
$para =~ s/^Usage: //;
$fixed_output .= "Usage\n" .
"-----\n\n" .
"::\n\n" .
" $para";
}
elsif ($para =~ m/^Examples:/) {
$fixed_output .= "Examples\n" .
"--------\n\n";
}
else {
$para =~ s/\.\. code-block:: perl/.. code-block:: bash/mg;
$para =~ s/`+$tool`+/$tool/g;
$para =~ s/([^\/])$tool/$1:program:`$tool`/g unless $in_code_block;
$para =~ s/^$tool/:program:`$tool`/gm;
$para =~ s/^--(\S+)$/.. option:: --$1/mg;
$para =~ s/"--(\S+)"/:option:`--$1`/g;
$para =~ s/\\\*/*/g;
$para =~ s/\\ //g;
$para =~ s/^[ ]+$//mg;
$para =~ s/^\n\n/\n/mg;
$para =~ s/code-block:: bash(\s+)CREATE/code-block:: sql$1CREATE/sg;
$para =~ s/\*\*:program/** :program/g;
if ( ($section || '') eq 'OUTPUT' ) {
$para =~ s/^([A-Z_]+)\n\n/$1\n/;
}
$fixed_output .= $para;
}
}
close $in;
if ($nofix) {
print $fixed_output;
}
else {
print $header . $fixed_output;
}
sub format_links {
if ( my ($label, $url) = split /\|/, $_[0] ) {
return $url, $label;
}
else {
local $conv->{callbacks}{link};
return $conv->view_seq_link(@_)
}
}
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