/**
* Converts the ruleset to CSS. Applies the output filters to the output.
*
* @param ILess_Node_Ruleset $ruleset
* @param array $variables
* @return string The generated CSS code
*/
protected function toCSS(ILess_Node_Ruleset $ruleset, array $variables)
{
// the cache key consists of:
// 1) parsed rules
// 2) assigned variables via the API
// 3) environment options
$cacheKey = $this->generateCacheKey(serialize($this->rules) . serialize($variables) . serialize(array($this->env->compress, $this->env->sourceMap, $this->env->sourceMapOptions, $this->env->relativeUrls, $this->env->precision, $this->env->debug, $this->env->dumpLineNumbers, $this->env->canShortenColors, $this->env->ieCompat, $this->env->strictMath, $this->env->strictUnits)));
$rebuild = true;
if ($this->cache->has($cacheKey)) {
$rebuild = false;
list($css, $importedFiles) = $this->cache->get($cacheKey);
// we need to check if the file has been modified
foreach ($importedFiles as $importedFileArray) {
list($lastModifiedBefore, $path, $currentFileInfo) = $importedFileArray;
$lastModified = $this->importer->getLastModified($path, $currentFileInfo);
if ($lastModifiedBefore != $lastModified) {
$rebuild = true;
// no need to continue, we will rebuild the CSS
break;
}
}
}
if ($rebuild) {
$css = parent::toCSS($ruleset, $variables);
// what have been imported?
$importedFiles = array();
foreach ($this->importer->getImportedFiles() as $importedFile) {
// we need to save original path, last modified timestamp and currentFileInfo object
// see ILess_Importer::setImportedFile()
$importedFiles[] = array($importedFile[0]->getLastModified(), $importedFile[1], $importedFile[2]);
}
$this->cache->set($cacheKey, array($css, $importedFiles));
}
return $this->filter($css);
}
