NAME

Dancer2::Plugin::SyntaxHighlight::Perl - Generate pretty HTML from Perl code in a Dancer2 app

DESCRIPTION

This module provides on-the-fly conversion of Perl to syntax-highlighted HTML. For convenience it adds the keywords highlight_perl and highlight_output to the Dancer2 DSL.

SYNOPSIS

Configuration

plugins:
  'SyntaxHighlight::Perl':
      line_numbers: 1

Application code

get '/perl_tutorial' => sub {
    return template 'perl_tutorial', {
        example_code   => highlight_perl('/path/to/file.pl'),
        example_output => highlight_output('/path/to/file.txt'),
    };
};

HTML template

<div style="white-space: pre-wrap">
  [% example_code %]
</div>

Or:

<div>
  <pre>[%example_code %]</pre>
</div>

EXAMPLE OUTPUT

FUNCTIONS

highlight_perl

Takes as input the full pathname of a file, or a filehandle, or a reference to a scalar. Expects what it is given to contain Perl code.

Outputs Perl code as HTML with syntax highlighting, in the form of <span></span> tags, with the appropriate class names, around the elements of the Perl code after it has been parsed by PPI.

If line_numbers is set to true in the Dancer2 config, the output will have line numbers.

For more details on the format of the ouput, see PPI::HTML, or examine the files in the examples/ directory in this distribution.

You will need to provide the CSS for the styling, see examples/ for examples.

Important: This module removes the <BR> tags from the end of the generated HTML lines, so you must enclose the HTML in either <pre></pre> tags or an element with style="white-space: pre-wrap">.

You can override this transformation by setting skip_postprocessing to true in the Dancer2 config.

highlight_output

Often when showing Perl code you will want to show also the output of the code, This function adds very simple highlighting to the saved output of Perl code.

Takes as input the full pathname of a file, or a filehandle, or a reference to a scalar.

Outputs the content with the first line wrapped in a <span></span> tag with the special class prompt, and all other with the class word.

This generated HTML also must be enclosed in either <pre></pre> tags or an element with style="white-space: pre-wrap" (or set skip_postprocessing to true in the Dancer2 config).

SEE ALSO

PPI, PPI::HTML