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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 with added functionality of fetching the CSS code to highlight from a given URI. The Syntax::Highlight::CSS 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',
    ua  => LWP::UserAgent->new( timeout => 30, agent => 'Opera 9.5' ),
    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.

`ua`


            
              
              ->spawn( ua  => LWP::UserAgent->new( timeout => 30, agent => 'Opera 9.5' ) );

Optional. The ua argument takes an LWP::UserAgent-like object as a value, the object must have a get() method that returns HTTP::Response object and takes a URI to fetch as the first argument. Default to:


            
              
              LWP::UserAgent->new(
    timeout => 30,
    agent   => 'Opera 9.5',
);

`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',
        uri         => 'http://zoffix.com/main.css',
            # or
        in          => 'a:hover { font-weight: bold; }',
        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',
        uri         => 'http://zoffix.com/main.css',
            # or
        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.

`uri`


            
              
              { uri => 'http://zoffix.com/' }

Optional if in argument is set. Takes a URI as a value, that uri must point to CSS code you wish to highlight.

`in`


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

Optional if uri argument is set. Takes a string as a value which represents CSS code to syntax-highlight. If uri argument is specified then the in argument is ignored.

`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 receive 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` and `uri`


            
              
              { 'in' => 'a:hover { font-weight: bold; }', }
{ 'uri' => 'http://zoffix.com' }

If in argument was specified to parse event/method the in key will contain the original CSS code. If uri argument was specified the uri key will contain the original URI.

`error`


            
              
              { 'error' => '404 Not Found' }

If you are using the uri argument to parse event/method then there is a chance for a network error to occur while the module is fetching the CSS code. If that's the case then the error key will be present and its value will be a human parsable error message.

`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.

REPOSITORY

Fork this module on GitHub: https://github.com/zoffixznet/POE-Component-Bundle-WebDevelopment

BUGS

To report bugs or request features, please use https://github.com/zoffixznet/POE-Component-Bundle-WebDevelopment/issues

If you can't access GitHub, you can email your request to bug-POE-Component-Bundle-WebDevelopment at rt.cpan.org

AUTHOR

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

LICENSE

You can use and distribute this module under the same terms as Perl itself. See the LICENSE file included in this distribution for complete details.

To install POE::Component::Bundle::WebDevelopment, copy and paste the appropriate command in to your terminal.

cpanm

cpanm POE::Component::Bundle::WebDevelopment

CPAN shell

perl -MCPAN -e shell
install POE::Component::Bundle::WebDevelopment

For more information on module installation, please visit the detailed CPAN module installation guide.

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Why not adopt me?

NAME

SYNOPSIS

DESCRIPTION

CONSTRUCTOR

spawn

alias

ua

options

debug

METHODS

parse

session_id

shutdown

ACCEPTED EVENTS

parse

event

uri

in

nnn

pre

session

user defined

shutdown

OUTPUT

out

in and uri

error

nnn and pre

user defined

SEE ALSO

REPOSITORY

BUGS

AUTHOR

LICENSE

Module Install Instructions

`spawn`

`alias`

`ua`

`options`

`debug`

`parse`

`session_id`

`shutdown`

`parse`

`event`

`uri`

`in`

`nnn`

`pre`

`session`

`shutdown`

`out`

`in` and `uri`

`error`

`nnn` and `pre`