/**
* 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;
}
/**
* 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.
*
* 'removeCharsets': (default true) remove all @charset at-rules
*
* '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>
*
* 'docRoot': (default = $_SERVER['DOCUMENT_ROOT'])
* see CssUriRewriter::rewrite
*
* @return string
*/
public static function minify($css, $options = array())
{
$options = array_merge(array('removeCharsets' => true, 'preserveComments' => true, 'currentDir' => null, 'docRoot' => $_SERVER['DOCUMENT_ROOT'], 'prependRelativePath' => null, 'symlinks' => array()), $options);
if ($options['removeCharsets']) {
$css = preg_replace('/@charset[^;]+;\\s*/', '', $css);
}
if (!$options['preserveComments']) {
$css = CssCompressor::process($css, $options);
} else {
$css = CommentPreserver::process($css, array('CssCompressor', 'process'), array($options));
}
if (!$options['currentDir'] && !$options['prependRelativePath']) {
return $css;
}
if ($options['currentDir']) {
return CssUriRewriter::rewrite($css, $options['currentDir'], $options['docRoot'], $options['symlinks']);
} else {
return CssUriRewriter::prepend($css, $options['prependRelativePath']);
}
}
