Highlight Links in Category

A Mediawiki Extension: If a link is a member of a category, it gets a custom CSS class.

You can add as many of these as you want, but from a UX perspective it's probably not awesome to add 500 different style links.

Requirements

Mediawiki 1.25 probably, but only tested on 1.26 and above. Theoretically can work on 1.12 but might require some changes.

Installation

Make sure that this directory is installed in mediawiki/extensions (or wherever your custom extension directory is.

Then, add this to LocalSettings.php:

	wfLoadExtension( 'HighlightLinksInCategory' );
	$wgHighlightLinksInCategory = array(
	    "Disambiguation_pages" => 'disambig',
	    "Templates" => 'templates',
	);

Configuration

The global variable $wgHighlightLinksInCategory is an array that configures which categories get an added CSS class. The keys are the Category names, which must include underscores instead of spaces. Do not include the Category: namespace. The value for each key is the CSS class you would like to add to that category. If you want add more than one class, separate the class names with spaces, like:

$wgHighlightLinksInCategory = array( "My_Cat" => "class1 class2 class3" );

If $wgHighlightLinksInCategory is not set or empty, this extension will do nothing.

Additionally, $wgHighlightLinksInCategoryFollowRedirects can be set to true in order to add classes based on a redirect's target's categories instead of its own categories. This defaults to false for backwards compatibility.

Styling

Simply add the styles you need for these links to Mediawiki:Common.css on your wiki. For example:

	a.disambig {
		color: rebeccapurple
	}
	a.templates {
		font-weight: bold;
		background-color: #efe;
	}

If you want one category to override another, you'll have to specify it with CSS.

	a.templates.disambig {
		font-weight: normal;
		background-color: transparent;
		color: rebeccapurple;
	}

Or alternatively, you could have defined the original a.templates rule as a.templates:not(.disambig) instead.

There's also the link icon approach:

	a.superlink {
		background-image: url(super.png);
		padding-left: 16px;
	}

License

MIT. See LICENSE for details.

Have the appropriate amount of fun!