/**
* Maybe compress CSS code.
*
* @since 140417 Initial release.
*
* @param string $css Raw CSS code.
*
* @return string CSS code (possibly compressed).
*/
protected function maybeCompressCssCode($css)
{
if ($benchmark = !empty($this->options['benchmark']) && $this->options['benchmark'] === 'details') {
$time = microtime(true);
}
$css = (string) $css;
// Force string value.
if (isset($this->options['compress_css_code'])) {
if (!$this->options['compress_css_code']) {
$disabled = true;
// Disabled flag.
}
}
if (!$css || !empty($disabled)) {
goto finale;
// Nothing to do.
}
if (strlen($css) > 1000000) {
// Exclude VERY large files. Too time-consuming.
// Should really be compressed ahead-of-time anyway.
goto finale;
// Don't compress HUGE files.
}
try {
// Catch CSS compression-related exceptions.
if (!($compressed_css = \WebSharks\CssMinifier\Core::compress($css))) {
// `E_USER_NOTICE` to avoid a show-stopping problem.
trigger_error('CSS compression failure.', E_USER_NOTICE);
} else {
$css = $this->stripUtf8Bom($compressed_css);
}
// Use compressed CSS file.
} catch (\Exception $exception) {
trigger_error($exception->getMessage(), E_USER_NOTICE);
}
finale:
// Target point; finale/return value.
if ($css) {
$css = trim($css);
}
if ($benchmark && !empty($time) && $css && empty($disabled)) {
$this->benchmark->addTime(__FUNCTION__, $time, sprintf('compressing CSS w/ checksum: `%1$s`', md5($css)));
}
return $css;
}
protected function execute($string)
{
return Core::compress($string);
}