NAME

Syntax::Highlight::HTML - Highlight HTML syntax

VERSION

Version 0.04

SYNOPSIS

    use Syntax::Highlight::HTML;

    my $highlighter = new Syntax::Highlight::HTML;
    $output = $highlighter->parse($html);

If $html contains the following HTML fragment:

    <!-- a description list -->
    <dl compact="compact">
      <dt>some word</dt>
      <dd>the description of the word. Plus some <a href="/definitions/other_word"
      >reference</a> towards another definition. </dd>
    </dl>

then the resulting HTML contained in $output will render like this:

DESCRIPTION

This module is designed to take raw HTML input and highlight it (using a CSS stylesheet, see "Notes" for the classes). The returned HTML code is ready for inclusion in a web page.

It is intented to be used as an highlighting filter, and as such does not reformat or reindent the original HTML code.

METHODS

new(): The constructor. Returns a "Syntax::Highlight::HTML" object, which derives from "HTML::Parser". As such, any "HTML::parser" method can be called on this object (that is, expect for "parse()" which is overloaded here).
Options

"nnn" - Activate line numbering. Default value: 0 (disabled).
"pre" - Surround result by "<pre>...</pre>" tags. Default value: 1 (enabled).

Example

To avoid surrounding the result by the "<pre>...</pre>" tags:

    my $highlighter = Syntax::Highlight::HTML->new(pre => 0);

parse()

Parse the HTML code given in argument and returns the highlighted HTML code, ready for inclusion in a web page.

Example

    $highlighter->parse("<p>Hello, world.</p>");

Internals Methods

The following methods are for internal use only.

_highlight_tag(): "HTML::Parser" tags handler: highlights a tag.
_highlight_text(): "HTML::Parser" text handler: highlights text.

NOTES

The resulting HTML uses CSS to colourize the syntax. Here are the classes that you can define in your stylesheet.

".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: "é" "«"
".h-lno" - for the line numbers

An example stylesheet can be found in eg/html-syntax.css.

EXAMPLE

Here is an example of generated HTML output. It was generated with the script eg/highlight.pl.

The following HTML fragment (which is the beginning of <http://search.cpan.org/~saper/>)

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
     <head>
      <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
      <link rel="stylesheet" href="/s/style.css" type="text/css">
      <title>search.cpan.org: S&#233;bastien Aperghis-Tramoni</title>
     </head>
     <body id="cpansearch">
    <center><div class="logo"><a href="/"><img src="/s/img/cpan_banner.png" alt="CPAN"></a></div></center>
    <div class="menubar">
     <a href="/">Home</a>
    &middot; <a href="/author/">Authors</a>
    &middot; <a href="/recent">Recent</a>
    &middot; <a href="/news">News</a>
    &middot; <a href="/mirror">Mirrors</a>
    &middot; <a href="/faq.html">FAQ</a>
    &middot; <a href="/feedback">Feedback</a>
    </div>
    <form method="get" action="/search" name="f" class="searchbox">
    <input type="text" name="query" value="" size="35">
    <br>in <select name="mode">
     <option value="all">All</option>
     <option value="module" >Modules</option>
     <option value="dist" >Distributions</option>
     <option value="author" >Authors</option>
    </select>&nbsp;<input type="submit" value="CPAN Search">
    </form>

will be rendered like this (using the CSS stylesheet eg/html-syntax.css):

CAVEATS

"Syntax::Highlight::HTML" relies on "HTML::Parser" for parsing the HTML and therefore suffers from the same limitations.

AUTHORS

Sébastien Aperghis-Tramoni, <sebastien@aperghis.net>

BUGS

Please report any bugs or feature requests to "bug-syntax-highlight-html@rt.cpan.org", or through the web interface at <https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Syntax-Highlight-HTML>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

COPYRIGHT & LICENSE

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