/**
* Minify a CSS string
*
* @param string $css
*
* @param array $options available options:
*
* 'preserveComments': (default true) multi-line comments that begin
* with "/*!" will be preserved with newlines before and after to
* enhance readability.
*
* 'prependRelativePath': (default null) if given, this string will be
* prepended to all relative URIs in import/url declarations
*
* 'currentDir': (default null) if given, this is assumed to be the
* directory of the current CSS file. Using this, minify will rewrite
* all relative URIs in import/url declarations to correctly point to
* the desired files. For this to work, the files *must* exist and be
* visible by the PHP process.
*
* 'symlinks': (default = array()) If the CSS file is stored in
* a symlink-ed directory, provide an array of link paths to
* target paths, where the link paths are within the document root. Because
* paths need to be normalized for this to work, use "//" to substitute
* the doc root in the link paths (the array keys). E.g.:
* <code>
* array('//symlink' => '/real/target/path') // unix
* array('//static' => 'D:\\staticStorage') // Windows
* </code>
*
* @return string
*/
public static function minify($css, $options = array())
{
if (isset($options['preserveComments']) && !$options['preserveComments']) {
$css = Paiva_Minify_CSS_Compressor::process($css, $options);
} else {
$css = Paiva_Minify_CSS_Comment::process($css, array('Paiva_Minify_CSS_Compressor', 'process'), array($options));
}
if (!isset($options['currentDir']) && !isset($options['prependRelativePath'])) {
return $css;
}
if (isset($options['currentDir'])) {
return Paiva_Minify_CSS_UriRewriter::rewrite($css, $options['currentDir'], isset($options['docRoot']) ? $options['docRoot'] : $_SERVER['DOCUMENT_ROOT'], isset($options['symlinks']) ? $options['symlinks'] : array());
} else {
return Paiva_Minify_CSS_UriRewriter::prepend($css, $options['prependRelativePath']);
}
}
/**
* In CSS content, prepend a path to relative URIs
*
* @param string $css
*
* @param string $path The path to prepend.
*
* @return string
*/
public static function prepend($css, $path)
{
self::$_prependPath = $path;
$css = self::_trimUrls($css);
// append
$css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/', array(self::$className, '_processUriCB'), $css);
$css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/', array(self::$className, '_processUriCB'), $css);
self::$_prependPath = null;
return $css;
}
/**
* Compile full list of files in $this->_cache array
*
* @return string
*/
protected function _getCompiledItem()
{
$fileProcessor = $this->getProcessor();
$path = $fileProcessor->getServerPath($this->getOption('dir') . $fileProcessor->fullFilename(md5(serialize($fileProcessor->getCache()))));
if (!file_exists($path)) {
// @todo: verificar a solução implementada no pacote minify
$dir = dirname($path);
if (!is_dir($dir) && !@mkdir($dir, 0777, true)) {
throw new Exception('Impossible to create destination directory ' . $dir);
}
$cssContent = '';
foreach ($fileProcessor->getCache() as $css) {
$content = file_get_contents($css['filepath']);
$cssContent .= $this->getOption('compress', true) ? Paiva_Minify_CSS::minify($content, array('prependRelativePath' => dirname($path), 'currentDir' => dirname($css['filepath']), 'symlinks' => $this->getOption('symlinks'))) : Paiva_Minify_CSS_UriRewriter::rewrite($content, dirname($css['filepath']), $this->_getCompiledItem(''), $this->getOption('symlinks'));
$cssContent .= "\n\n";
}
file_put_contents($path, $cssContent);
$fileProcessor->gzip($path, $cssContent);
}
return $this->createDataStylesheet(array('href' => $this->getProcessor()->getWebPath($path)));
}