From Code to Community: Sponsoring The Perl and Raku Conference 2025 Learn more

 / 
App-ZofCMS-1.001008
River stage one • 1 direct dependent • 1 total dependent
/ App::ZofCMS::Plugin::Syntax::Highlight::HTML

NAME

App::ZofCMS::Plugin::Syntax::Highlight::HTML - provide HTML code snippets on your site

SYNOPSIS

In ZofCMS template:


            

              
              
{
    body        => \'index.tmpl',
    highlight_html => {
        foohtml => '<div class="bar">beer</div>',
        bar     => sub { return '<div class="bar">beer</div>' },
        beer    => \ 'filename.of.the.file.with.HTML.in.datastore.dir',
    },
    plugins     => [ qw/Syntax::Highlight::HTML/ ],
}

In HTML::Template template:


            

              
              
<tmpl_var name="foohtml">
<tmpl_var name="bar">
<tmpl_var name="beer">

DESCRIPTION

The module is a plugin for App::ZofCMS. It provides means to include HTML (HyperText Markup Lanugage) code snippets with syntax highlights on your pages.

This documentation assumes you've read App::ZofCMS, App::ZofCMS::Config and App::ZofCMS::Template

USED FIRST-LEVEL ZofCMS TEMPLATE KEYS

plugins


            

              
              
{
    plugins => [ qw/Syntax::Highlight::HTML/ ],
}

First and obvious is that you'd want to include the plugin in the list of plugins to run.

highlight_html


            

              
              
{
    highlight_html => {
        foohtml => '<div class="bar">beer</div>',
        bar     => sub { return '<div class="bar">beer</div>' },
        beer    => \ 'filename.of.the.file.with.HTML.in.datastore.dir',
    },
}

The highlight_html is the heart key of the plugin. It takes a hashref as a value. The keys of this hashref except for two special keys described below are the name of <tmpl_var name=""> tags in your HTML::Template template into which to stuff the syntax-highlighted code. The value of those keys can be either a scalar, subref or a scalarref. They are interpreted by the plugin as follows:

scalar


            

              
              
highlight_html => {
    foohtml => '<div class="bar">beer</div>'
}

When the value of the key is a scalar it will be interpreted as HTML code to be highlighted. This will do it for short snippets.

scalarref


            

              
              
highlight_html => {
    beer    => \ 'filename.of.the.file.with.HTML.in.datastore.dir',
},

When the value is a scalarref it will be interpreted as the name of a file in the data_store dir. That file will be read and its contents will be understood as HTML code to be highlighted. If an error occured during opening of the file, your <tmpl_var name=""> tag allocated for this entry will be populated with an error message.

subref


            

              
              
highlight_html => {
    bar     => sub { return '<div class="bar">beer</div>' },
},

When the value is a subref, it will be executed and its return value will be taken as HTML code to highlight. The @_ of that sub when called will contain the following: $template, $query, $config where $template is a hashref of your ZofCMS template, $query is a hashref of the parameter query whether it's a POST or a GET request, and $config is the App::ZofCMS::Config object.

SPECIAL KEYS IN highlight_html


            

              
              
highlight_html => {
    nnn => 1,
    pre => 0,
},

There are two special keys, namely nnn and pre, in highlight_html hashref. Their values will affect the resulting highlighted HTML code.

nnn


            

              
              
highlight_html => {
    nnn => 1,
}

Instructs the highlighter to activate line numbering. Default value: 0 (disabled).

pre


            

              
              
highlight_html => {
    nnn => 0,
}

Instructs the highlighter to surround result by <pre>...</pre> tags. Default value: 1 (enabled).

highlight_before


            

              
              
{
    highlight_before => '<div class="highlights">',
}

Takes a scalar as a value. When specified, every highlighted HTML code will be prefixed with whatever you specify here.

highlight_after


            

              
              
{
    highlight_after => '</div>',
}

Takes a scalar as a value. When specified, every highlighted HTML code will be postfixed with whatever you specify here.

GENERATED CODE

Given '<foo class="bar">beer</foo>' as input plugin will generate the following code:


            

              
              
<pre>
    <span class="h-ab">&lt;</span><span class="h-tag">foo</span>
    <span class="h-attr">class</span>=<span class="h-attv">"bar</span>"
    <span class="h-ab">&gt;</span>beer<span class="h-ab">&lt;/</span>
    <span class="h-tag">foo</span><span class="h-ab">&gt;</span>
</pre>

Now you'd use CSS to highlight specific parts of HTML syntax. Here are the classes that you can define in your stylesheet (list shamelessly stolen from Syntax::Highlight::HTML documentation):

  • .h-decl - for a markup declaration; in a HTML document, the only markup declaration is the DOCTYPE, like: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">

  • .h-pi - for a process instruction like <?html ...> or <?xml ...?>

  • .h-com - for a comment, <!-- ... -->

  • .h-ab - for the characters '<' and '>' as tag delimiters

  • .h-tag - for the tag name of an element

  • .h-attr - for the attribute name

  • .h-attv - for the attribute value

  • .h-ent - for any entities: &eacute; &#171;

  • .h-lno - for the line numbers

SAMPLE CSS CODE FOR HIGHLIGHTING

Sebastien Aperghis-Tramoni, the author of Syntax::Highlight::HTML, was kind enough to provide sample CSS code defining the look of each element of HTML syntax. It is presented below:


            

              
              
.h-decl { color: #336699; font-style: italic; }   /* doctype declaration  */
.h-pi   { color: #336699;                     }   /* process instruction  */
.h-com  { color: #338833; font-style: italic; }   /* comment              */
.h-ab   { color: #000000; font-weight: bold;  }   /* angles as tag delim. */
.h-tag  { color: #993399; font-weight: bold;  }   /* tag name             */
.h-attr { color: #000000; font-weight: bold;  }   /* attribute name       */
.h-attv { color: #333399;                     }   /* attribute value      */
.h-ent  { color: #cc3333;                     }   /* entity               */
.h-lno  { color: #aaaaaa; background: #f7f7f7;}   /* line numbers         */

PREREQUISITES

Despite the ZofCMS design this module uses Syntax::Highlight::HTML which in turn uses HTML::Parser which needs a C compiler to install.

This module requires Syntax::Highlight::HTML and File::Spec (the later is part of the core)

REPOSITORY

Fork this module on GitHub: https://github.com/zoffixznet/App-ZofCMS

BUGS

To report bugs or request features, please use https://github.com/zoffixznet/App-ZofCMS/issues

If you can't access GitHub, you can email your request to bug-App-ZofCMS 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.