Add theme function for facet options

Very nice to have that option but it will definitely need a theme function also.
Themers need to be able to override the markup regardless of what has been selected in the settings.

For example they might not want the count wrapped in parentheses or they might want additional spans and classes for styling.

Oops I mistook this for a different issue. Now that I have properly refreshed my memory...

Markup is not relevant here since we're dealing with select options, so it's just for changing the actual text, like the parentheses, or possibly you want the count at the start or something like that.

Overriding the themeing of the whole select is a bit out of the scope of this issue. This one is just for options.

So something to change this:

<?php
$options[$url] = $item['#markup'].' ('.$item['#count'].')';
?>

With something along these lines:

<?php
$options[$url] = theme('facetapi_select_select_option', array(
  'facet_text' => $item['#markup'],
  'facet_count' => $item['#count'],
  'show_count' => $this->settings->settings['count_display'],
));
?>

And then a theme function to print out something like this:

<?php
$output = $variables['facet_text'];

if ($variables['show_count']) {
   $output .= ' (' . $variables['facet_count'] . ')';
}

return $output;
?>

EDIT: Not sure why DRupal.org is messing with the code format.