Provided by: libwiki-toolkit-formatter-usemod-perl_0.25-1_all 
NAME
Wiki::Toolkit::Formatter::UseMod - UseModWiki-style formatting for Wiki::Toolkit
DESCRIPTION
A formatter backend for Wiki::Toolkit that supports UseMod-style formatting.
SYNOPSIS
use Wiki::Toolkit::Formatter::UseMod;
# Instantiate - see below for parameter details.
my $formatter = Wiki::Toolkit::Formatter::UseMod->new( %config );
# Format some text.
my $cooked = $formatter->format($raw);
# Find out which other nodes that text would link to.
my @links_to = $formatter->find_internal_links($raw);
METHODS
new
my $formatter = Wiki::Toolkit::Formatter::UseMod->new(
extended_links => 0, # $FreeLinks
implicit_links => 1, # $WikiLinks
force_ucfirst_nodes => 1, # $FreeUpper
use_headings => 1, # $UseHeadings
allowed_tags => [qw(b i)], # defaults to none
macros => {},
pass_wiki_to_macros => 0,
node_prefix => 'wiki.pl?',
node_suffix => '',
edit_prefix => 'wiki.pl?action=edit;id=',
edit_suffix => '',
munge_urls => 0,
external_link_class => 'external',
escape_url_commas => 1,
);
Parameters will default to the values shown above (apart from "allowed_tags", which
defaults to allowing no tags, and "external_link_class", which defaults to false).
Internal links
"node_prefix", "node_suffix", "edit_prefix" and "edit_suffix" allow you to control
the URLs generated for links to other wiki pages. So for example with the
defaults given above, a link to the Home node will have the URL "wiki.pl?Home" and
a link to the edit form for the Home node will have the URL
"wiki.pl?action=edit;id=Home"
(Note that of course the URLs that you wish to have generated will depend on how
your wiki application processes its CGI parameters - you can't just put random
stuff in there and hope it works!)
By default, any commas in these URLs will be escaped to %2C, in line with the
default behaviour of URI::Escape. If you don't want this to happen, pass a false
value to "escape_url_commas".
Internal links - advanced options
If you wish to have greater control over the links, you may use the
"munge_node_name" parameter. The value of this should be a subroutine reference.
This sub will be called on each internal link after all other formatting and
munging except URL escaping has been applied. It will be passed the node name as
its first parameter and should return a node name. Note that this will affect the
URLs of internal links, but not the link text.
Example:
# The formatter munges links so node names are ucfirst.
# Ensure 'state51' always appears in lower case in node names.
munge_node_name => sub {
my $node_name = shift;
$node_name =~ s/State51/state51/g;
return $node_name;
}
Note: This is advanced usage and you should only do it if you really know what
you're doing. Consider in particular whether and how your munged nodes are going
to be treated by "retrieve_node".
External links
By default, we emulate the UseModWiki behaviour of formatting external links with
hardcoded square brackets around them. If you would instead prefer to control
this with CSS, supply the "external_link_class" parameter to "->new" - the value
of this parameter will be used as the class applied to the link (so it should be a
valid CSS class name). Controlling the appearance with CSS is our recommended
method, but the default is as described for reasons of backward compatibility.
URL munging
If you set "munge_urls" to true, then your URLs will be more user-friendly, for
example
http://example.com/wiki.cgi?Mailing_List_Managers
rather than
http://example.com/wiki.cgi?Mailing%20List%20Managers
The former behaviour is the actual UseMod behaviour, but requires a little
fiddling about in your code (see "node_name_to_node_param"), so the default is to
not munge URLs.
Macros
Be aware that macros are processed after filtering out disallowed HTML tags and
before transforming from wiki markup into HTML. They are also not called in any
particular order.
The keys of macros should be either regexes or strings. The values can be strings,
or, if the corresponding key is a regex, can be coderefs. The coderef will be
called with the first nine substrings captured by the regex as arguments. I would
like to call it with all captured substrings but apparently this is complicated.
You may wish to have access to the overall wiki object in the subs defined in your
macro. To do this:
• Pass the wiki object to the "->formatter" call as described below.
• Pass a true value in the "pass_wiki_to_macros" parameter when calling "->new".
If you do this, then all coderefs will be called with the wiki object as the first
parameter, followed by the first nine captured substrings as described above.
Note therefore that setting "pass_wiki_to_macros" may cause backwards
compatibility issues.
Macro examples:
# Simple example - substitute a little search box for '@SEARCHBOX'
macros => {
'@SEARCHBOX' =>
qq(<form action="wiki.pl" method="get">
<input type="hidden" name="action" value="search">
<input type="text" size="20" name="terms">
<input type="submit"></form>),
}
# More complex example - substitute a list of all nodes in a
# category for '@INDEX_LINK [[Category Foo]]'
pass_wiki_to_macros => 1,
macros => {
qr/\@INDEX_LINK\s+\[\[Category\s+([^\]]+)]]/ =>
sub {
my ($wiki, $category) = @_;
my @nodes = $wiki->list_nodes_by_metadata(
metadata_type => "category",
metadata_value => $category,
ignore_case => 1,
);
my $return = "\n";
foreach my $node ( @nodes ) {
$return .= "* "
. $wiki->formatter->format_link(
wiki => $wiki,
link => $node,
)
. "\n";
}
return $return;
},
}
format
my $html = $formatter->format($submitted_content, $wiki);
Escapes any tags which weren't specified as allowed on creation, then interpolates any
macros, then translates the raw Wiki language supplied into HTML.
A Wiki::Toolkit object can be supplied as an optional second parameter. This object
will be used to determine whether a linked-to node exists or not, and alter the
presentation of the link accordingly. This is only really in here for use when this
method is being called from within Wiki::Toolkit.
format_link
my $string = $formatter->format_link(
link => "Home Node",
wiki => $wiki,
);
An internal method exposed to make it easy to go from eg
* Foo
* Bar
to
* <a href="index.cgi?Foo">Foo</a>
* <a href="index.cgi?Bar">Bar</a>
See Macro Examples above for why you might find this useful.
"link" should be something that would go inside your extended link delimiters. "wiki"
is optional but should be a Wiki::Toolkit object. If you do supply "wiki" then the
method will be able to check whether the node exists yet or not and so will call
"->make_edit_link" instead of "->make_internal_link" where appropriate. If you don't
supply "wiki" then "->make_internal_link" will be called always.
This method used to be private so may do unexpected things if you use it in a way that
I haven't tested yet.
find_internal_links
my @links_to = $formatter->find_internal_links( $content );
Returns a list of all nodes that the supplied content links to.
node_name_to_node_param
use URI::Escape;
$param = $formatter->node_name_to_node_param( "Recent Changes" );
my $url = "wiki.pl?" . uri_escape($param);
In usemod, the node name is encoded prior to being used as part of the URL. This
method does this encoding (essentially, whitespace is munged into underscores). In
addition, if "force_ucfirst_nodes" is in action then the node names will be forced
ucfirst if they weren't already.
Note that unless "munge_urls" was set to true when "new" was called, this method will
do nothing.
node_param_to_node_name
my $node = $q->param('node') || "";
$node = $formatter->node_param_to_node_name( $node );
In usemod, the node name is encoded prior to being used as part of the URL, so we must
decode it before we can get back the original node name.
Note that unless "munge_urls" was set to true when "new" was called, this method will
do nothing.
SUBCLASSING
The following methods can be overridden to provide custom behaviour.
make_edit_link
my $link = $self->make_edit_link(
title => "Home Page",
url => "http://example.com/?id=Home",
);
This method will be passed a title and a url and should return an HTML snippet. For
example, you can add a "title" attribute to the link like so:
sub make_edit_link {
my ($self, %args) = @_;
my $title = $args{title};
my $url = $args{url};
return qq|[$title]<a href="$url" title="create">?</a>|;
}
make_internal_link
my $link = $self->make_internal_link(
title => "Home Page",
url => "http://example.com/?id=Home",
);
This method will be passed a title and a url and should return an HTML snippet. For
example, you can add a "class" attribute to the link like so:
sub make_internal_link {
my ($self, %args) = @_;
my $title = $args{title};
my $url = $args{url};
return qq|<a href="$url" class="internal">$title</a>|;
}
make_external_link
my $link = $self->make_external_link(
title => "London Perlmongers",
url => "http://london.pm.org",
);
This method will be passed a title and a url and should return an HTML snippet. For
example, you can add a little icon after each external link like so:
sub make_external_link {
my ($self, %args) = @_;
my $title = $args{title};
my $url = $args{url};
return qq|<a href="$url">$title</a> <img src="external.gif">|;
}
AUTHOR
Kake Pugh (kake@earth.li) and the Wiki::Toolkit team.
COPYRIGHT
Copyright (C) 2003-2004 Kake Pugh. All Rights Reserved.
Copyright (C) 2006-2012 the Wiki::Toolkit team. All Rights Reserved.
This module is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
CREDITS
The OpenGuides London team (<http://openguides.org/london/>) sent some very helpful bug
reports. A lot of the work of this module is done within chromatic's module,
Text::WikiFormat.
CAVEATS
This doesn't yet support all of UseMod's formatting features and options, by any means.
This really truly is a 0.* release. Please send bug reports, omissions, patches, and
stuff, to me at "kake@earth.li".
NOTE ON USEMOD COMPATIBILITY
UseModWiki "encodes" node names before making them part of a URL, so for example a node
about Wombat Defenestration will have a URL like
http://example.com/wiki.cgi?Wombat_Defenestration
So if we want to emulate a UseModWiki exactly, we need to munge back and forth between
node names as titles, and node names as CGI params.
my $formatter = Wiki::Toolkit::Formatter::UseMod->new( munge_urls => 1 );
my $node_param = $q->param('id') || $q->param('keywords') || "";
my $node_name = $formatter->node_param_to_node_name( $node_param );
use URI::Escape;
my $url = "http://example.com/wiki.cgi?"
. uri_escape(
$formatter->node_name_to_node_param( "Wombat Defenestration" )
);
SEE ALSO
• Wiki::Toolkit
• Text::WikiFormat
• UseModWiki (<http://www.usemod.com/cgi-bin/wiki.pl>)