/ 
POE-Component-Syntax-Highlight-CSS-0.0102
/ POE::Component::Syntax::Highlight::CSS

NAME

POE::Component::Syntax::Highlight::CSS - non-blocking wrapper around Syntax::Highlight::CSS

SYNOPSIS

use strict;
use warnings;
use POE qw/Component::Syntax::Highlight::CSS/;

my $poco = POE::Component::Syntax::Highlight::CSS->spawn;

POE::Session->create( package_states => [ main => [qw(_start results)] ], );

$poe_kernel->run;

sub _start {
    $poco->parse({
            event => 'results',
            in    => 'a:hover { font-weight: bold; }',
        }
    );
}

sub results {
    print "$_[ARG0]->{out}\n";
    $poco->shutdown;
}

Using event based interface is also possible of course.

DESCRIPTION

The module is a non-blocking wrapper around Syntax::Highlight::CSS (although the major intention was to create event based interface) which provides interface to highlight CSS code by wrapping syntax elements into HTML <span> elements with different class names.

CONSTRUCTOR

spawn

my $poco = POE::Component::Syntax::Highlight::CSS->spawn;

POE::Component::Syntax::Highlight::CSS->spawn(
    alias => 'highlighter',
    options => {
        debug => 1,
        trace => 1,
        # POE::Session arguments for the component
    },
    debug => 1, # output some debug info
);

The spawn method returns a POE::Component::Syntax::Highlight::CSS object. It takes a few arguments, all of which are optional. The possible arguments are as follows:

alias

->spawn( alias => 'highlighter' );

Optional. Specifies a POE Kernel alias for the component.

options

->spawn(
    options => {
        trace => 1,
        default => 1,
    },
);

Optional. A hashref of POE Session options to pass to the component's session.

debug

->spawn(
    debug => 1
);

When set to a true value turns on output of debug messages. Defaults to: 0.

METHODS

parse

$poco->parse( {
        event       => 'event_for_output',
        nnn         => 1,
        pre         => 1,
        _blah       => 'pooh!',
        session     => 'other',
    }
);

Takes a hashref as an argument, does not return a sensible return value. See parse event's description for more information.

session_id

my $poco_id = $poco->session_id;

Takes no arguments. Returns component's session ID.

shutdown

$poco->shutdown;

Takes no arguments. Shuts down the component.

ACCEPTED EVENTS

parse

$poe_kernel->post( highlighter => parse => {
        event       => 'event_for_output',
        in          => 'a:hover { font-weight: bold; }',
        nnn         => 1,
        pre         => 1,
        _blah       => 'pooh!',
        session     => 'other',
    }
);

Instructs the component to parse given CSS code. Takes a hashref as an argument, the possible keys/value of that hashref are as follows:

event

{ event => 'results_event', }

Mandatory. Specifies the name of the event to emit when results are ready. See OUTPUT section for more information.

in

{ in => 'a:hover { font-weight: bold; }', }

Mandatory. Takes a string as a value which represents CSS code to syntax-highlight.

nnn

{ nnn => 1, }

Optional. Takes either true or false values. When set to a true value will insert line numbers into the highlighted CSS code. Defaults to: 0

pre

{ pre => 1, }

Optional. Takes either true or false values. When set to a true value will wrap highlighted CSS code into a <pre> element. Defaults to: 1

session

{ session => 'other' }

{ session => $other_session_reference }

{ session => $other_session_ID }

Optional. Takes either an alias, reference or an ID of an alternative session to send output to.

user defined

{
    _user    => 'random',
    _another => 'more',
}

Optional. Any keys starting with _ (underscore) will not affect the component and will be passed back in the result intact.

shutdown

$poe_kernel->post( highlighter => 'shutdown' );

Takes no arguments. Tells the component to shut itself down.

OUTPUT

$VAR1 = {
    'out' => '<pre class="css-code"><span class="ch-l">  0</span> <span
            class="ch-sel">a<span class="ch-ps">:hover</span></span> { <span
            class="ch-p">font-weight</span>: <span class="ch-v">bold</span>; }</pre>',
    'in' => 'a:hover { font-weight: bold; }',
    'nnn' => 1,
    'pre' => 1,
    '_blah' => 'foos'
};

The event handler set up to handle the event which you've specified in the event argument to parse() method/event will recieve input in the $_[ARG0] in a form of a hashref. The possible keys/value of that hashref are as follows:

out

{
    'out' => '<pre class="css-code"><span class="ch-l">  0</span> <span
            class="ch-sel">a<span class="ch-ps">:hover</span></span> { <span
            class="ch-p">font-weight</span>: <span class="ch-v">bold</span>; }</pre>',
}

The out key will contain a string representing highlighted CSS code. See documentation for Syntax::Highlight::CSS for explanation of each of the possible class="" names on the generated <span>s.

in

{ 'in' => 'a:hover { font-weight: bold; }', }

The in key will contain the original CSS code.

nnn and pre

{
    'nnn' => 1,
    'pre' => 1,
}

If you specified either nnn or pre arguments to the parse() event/method they will be present in the output with the values that you set to them.

user defined

{ '_blah' => 'foos' }

Any arguments beginning with _ (underscore) passed into the parse() event/method will be present intact in the result.

SEE ALSO

POE, Syntax::Highlight::CSS

AUTHOR

'Zoffix, <'zoffix at cpan.org'> (http://zoffix.com/, http://haslayout.net/, http://zofdesign.com/)

BUGS

Please report any bugs or feature requests to bug-poe-component-syntax-highlight-css at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=POE-Component-Syntax-Highlight-CSS. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc POE::Component::Syntax::Highlight::CSS

You can also look for information at:

COPYRIGHT & LICENSE

Copyright 2008 'Zoffix, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.