/**
* Rewrite relative URLs in CSS files to take account of their new location.
*
* CSS files may contain relative URLs, such as "background-image: url(img.jpg)".
* If our processed CSS file is in a different location, such as "min" instead of
* "css", then we must rewrite this to "background-image: url(../css/img.jpg)".
*
* @param string $data The data to be filtered
* @param string $asset_url The original URL for this data
* @param Assets $assets The asset manager object, for access to its config settings and utilities
*
* @return string
*/
public function filter($data, $asset_url, $assets)
{
if ($assets->isAbsoluteUrl($asset_url)) {
$prefix = dirname($asset_url);
} else {
$prefix = $assets->relativePath($assets->getDestination(), $assets->getCssSource() . '/' . dirname($asset_url));
}
$data = preg_replace_callback(['/(\\burl\\s*\\(\\s*")([^"]+?)("\\s*\\))/', '/(\\burl\\s*\\(\\s*\')([^\']+?)(\'\\s*\\))/', '/(\\burl\\s*\\(\\s*)([^\'"]+?)(\\s*\\))/'], function ($matches) use($assets, $prefix) {
if ($assets->isAbsoluteUrl($matches[2])) {
return $matches[0];
} else {
return $matches[1] . $assets->normalizePath($prefix . '/' . $matches[2]) . $matches[3];
}
}, $data);
return $data;
}
/**
* Execute the console command.
*/
public function handle()
{
$this->assets->purge($this);
}