<h2>File Contents: /home/planet5/www/wp-content/plugins/wp-rocket/inc/vendors/classes/class-minify-css-urirewriter.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/www/wp-content/plugins/wp-rocket/inc/vendors/classes/class-minify-css-urirewriter.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php
/**
 * Class Minify_CSS_UriRewriter
 *
 * @package Minify
 */

/**
 * Rewrite file-relative URIs as root-relative in CSS files
 *
 * @package Minify
 * @author Stephen Clay &lt;steve@mrclay.org&gt;
 */
class Minify_CSS_UriRewriter {

	/**
	 * rewrite() and rewriteRelative() append debugging information here
	 *
	 * @var string
	 */
	public static $debugText = &#039;&#039;;

	/**
	 * In CSS content, rewrite file relative URIs as root relative
	 *
	 * @param string $css
	 *
	 * @param string $currentDir The directory of the current CSS file.
	 *
	 * @param string $docRoot The document root of the web site in which
	 * the CSS file resides (default = $_SERVER[&#039;DOCUMENT_ROOT&#039;]).
	 *
	 * @param array $symlinks (default = array()) If the CSS file is stored in
	 * a symlink-ed directory, provide an array of link paths to
	 * target paths, where the link paths are within the document root. Because
	 * paths need to be normalized for this to work, use &quot;//&quot; to substitute
	 * the doc root in the link paths (the array keys). E.g.:
	 * &lt;code&gt;
	 * array(&#039;//symlink&#039; =&gt; &#039;/real/target/path&#039;) // unix
	 * array(&#039;//static&#039; =&gt; &#039;D:\\staticStorage&#039;)  // Windows
	 * &lt;/code&gt;
	 *
	 * @return string
	 */
	public static function rewrite($css, $currentDir, $docRoot = null, $symlinks = array())
	{
		self::$_docRoot = self::_realpath(
			$docRoot ? $docRoot : $_SERVER[&#039;DOCUMENT_ROOT&#039;]
		);
		self::$_currentDir = self::_realpath($currentDir);
		self::$_symlinks = array();

		// normalize symlinks in order to map to link
		foreach ($symlinks as $link =&gt; $target) {
			$link = ($link === &#039;//&#039;) ? self::$_docRoot : str_replace(&#039;//&#039;, self::$_docRoot . &#039;/&#039;, $link);
			$link = strtr($link, &#039;/&#039;, DIRECTORY_SEPARATOR);

			self::$_symlinks[$link] = self::_realpath($target);
		}

		self::$debugText .= &quot;docRoot    : &quot; . self::$_docRoot . &quot;\n&quot;
						  . &quot;currentDir : &quot; . self::$_currentDir . &quot;\n&quot;;
		if (self::$_symlinks) {
			self::$debugText .= &quot;symlinks : &quot; . var_export(self::$_symlinks, 1) . &quot;\n&quot;;
		}
		self::$debugText .= &quot;\n&quot;;

		$css = self::_trimUrls($css);

		$css = self::_owlifySvgPaths($css);

		// rewrite
		$pattern = &#039;/@import\\s+([\&#039;&quot;])(.*?)[\&#039;&quot;]/&#039;;
		$css = preg_replace_callback($pattern, array(self::$className, &#039;_processUriCB&#039;), $css);

		$pattern = &#039;/url\\(\\s*([\&#039;&quot;](.*?)[\&#039;&quot;]|[^\\)\\s]+)\\s*\\)/&#039;;
		$css = preg_replace_callback($pattern, array(self::$className, &#039;_processUriCB&#039;), $css);

		$css = self::_unOwlify($css);

		return $css;
	}

	/**
	 * 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);

		$css = self::_owlifySvgPaths($css);
		
		// append
		$pattern = &#039;/@import\\s+([\&#039;&quot;])(.*?)[\&#039;&quot;]/&#039;;
		$css = preg_replace_callback($pattern, array(self::$className, &#039;_processUriCB&#039;), $css);

		$pattern = &#039;/url\\(\\s*([\&#039;&quot;](.*?)[\&#039;&quot;]|[^\\)\\s]+)\\s*\\)/&#039;;
		$css = preg_replace_callback($pattern, array(self::$className, &#039;_processUriCB&#039;), $css);

		$css = self::_unOwlify($css);

		self::$_prependPath = null;

		return $css;
	}

	/**
	 * Get a root relative URI from a file relative URI
	 *
	 * &lt;code&gt;
	 * Minify_CSS_UriRewriter::rewriteRelative(
	 *       &#039;../img/hello.gif&#039;
	 *     , &#039;/home/user/www/css&#039;  // path of CSS file
	 *     , &#039;/home/user/www&#039;      // doc root
	 * );
	 * // returns &#039;/img/hello.gif&#039;
	 *
	 * // example where static files are stored in a symlinked directory
	 * Minify_CSS_UriRewriter::rewriteRelative(
	 *       &#039;hello.gif&#039;
	 *     , &#039;/var/staticFiles/theme&#039;
	 *     , &#039;/home/user/www&#039;
	 *     , array(&#039;/home/user/www/static&#039; =&gt; &#039;/var/staticFiles&#039;)
	 * );
	 * // returns &#039;/static/theme/hello.gif&#039;
	 * &lt;/code&gt;
	 *
	 * @param string $uri file relative URI
	 *
	 * @param string $realCurrentDir realpath of the current file&#039;s directory.
	 *
	 * @param string $realDocRoot realpath of the site document root.
	 *
	 * @param array $symlinks (default = array()) If the file is stored in
	 * a symlink-ed directory, provide an array of link paths to
	 * real target paths, where the link paths &quot;appear&quot; to be within the document
	 * root. E.g.:
	 * &lt;code&gt;
	 * array(&#039;/home/foo/www/not/real/path&#039; =&gt; &#039;/real/target/path&#039;) // unix
	 * array(&#039;C:\\htdocs\\not\\real&#039; =&gt; &#039;D:\\real\\target\\path&#039;)  // Windows
	 * &lt;/code&gt;
	 *
	 * @return string
	 */
	public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array())
	{
		// prepend path with current dir separator (OS-independent)
		$path = strtr($realCurrentDir, &#039;/&#039;, DIRECTORY_SEPARATOR);
		$path .= DIRECTORY_SEPARATOR . strtr($uri, &#039;/&#039;, DIRECTORY_SEPARATOR);

		self::$debugText .= &quot;file-relative URI  : {$uri}\n&quot;
						  . &quot;path prepended     : {$path}\n&quot;;

		// &quot;unresolve&quot; a symlink back to doc root
		foreach ($symlinks as $link =&gt; $target) {
			if (0 === strpos($path, $target)) {
				// replace $target with $link
				$path = $link . substr($path, strlen($target));

				self::$debugText .= &quot;symlink unresolved : {$path}\n&quot;;

				break;
			}
		}
		// strip doc root
		$path = substr($path, strlen($realDocRoot));

		self::$debugText .= &quot;docroot stripped   : {$path}\n&quot;;

		// fix to root-relative URI
		$uri = strtr($path, &#039;/\\&#039;, &#039;//&#039;);
		$uri = self::removeDots($uri);

		self::$debugText .= &quot;traversals removed : {$uri}\n\n&quot;;

		return $uri;
	}

	/**
	 * Remove instances of &quot;./&quot; and &quot;../&quot; where possible from a root-relative URI
	 *
	 * @param string $uri
	 *
	 * @return string
	 */
	public static function removeDots($uri)
	{
		$uri = str_replace(&#039;/./&#039;, &#039;/&#039;, $uri);
		// inspired by patch from Oleg Cherniy
		do {
			$uri = preg_replace(&#039;@/[^/]+/\\.\\./@&#039;, &#039;/&#039;, $uri, 1, $changed);
		} while ($changed);

		return $uri;
	}

	/**
	 * Defines which class to call as part of callbacks, change this
	 * if you extend Minify_CSS_UriRewriter
	 *
	 * @var string
	 */
	protected static $className = &#039;Minify_CSS_UriRewriter&#039;;

	/**
	 * Get realpath with any trailing slash removed. If realpath() fails,
	 * just remove the trailing slash.
	 *
	 * @param string $path
	 *
	 * @return mixed path with no trailing slash
	 */
	protected static function _realpath($path)
	{
		$realPath = realpath($path);
		if ($realPath !== false) {
			$path = $realPath;
		}

		return rtrim($path, &#039;/\\&#039;);
	}

	/**
	 * Directory of this stylesheet
	 *
	 * @var string
	 */
	private static $_currentDir = &#039;&#039;;

	/**
	 * DOC_ROOT
	 *
	 * @var string
	 */
	private static $_docRoot = &#039;&#039;;

	/**
	 * directory replacements to map symlink targets back to their
	 * source (within the document root) E.g. &#039;/var/www/symlink&#039; =&gt; &#039;/var/realpath&#039;
	 *
	 * @var array
	 */
	private static $_symlinks = array();

	/**
	 * Path to prepend
	 *
	 * @var string
	 */
	private static $_prependPath = null;

	/**
	 * @param string $css
	 *
	 * @return string
	 */
	private static function _trimUrls($css)
	{
		$pattern = &#039;/
			url\\(      # url(
			\\s*
			([^\\)]+?)  # 1 = URI (assuming does not contain &quot;)&quot;)
			\\s*
			\\)         # )
		/x&#039;;

		return preg_replace($pattern, &#039;url($1)&#039;, $css);
	}

	/**
	 * @param array $m
	 *
	 * @return string
	 */
	private static function _processUriCB($m)
	{
		// $m matched either &#039;/@import\\s+([\&#039;&quot;])(.*?)[\&#039;&quot;]/&#039; or &#039;/url\\(\\s*([^\\)\\s]+)\\s*\\)/&#039;
		$isImport = ($m[0][0] === &#039;@&#039;);
		// determine URI and the quote character (if any)
		if ($isImport) {
			$quoteChar = $m[1];
			$uri = $m[2];
		} else {
			// $m[1] is either quoted or not
			$quoteChar = ($m[1][0] === &quot;&#039;&quot; || $m[1][0] === &#039;&quot;&#039;) ? $m[1][0] : &#039;&#039;;

			$uri = ($quoteChar === &#039;&#039;) ? $m[1] : substr($m[1], 1, strlen($m[1]) - 2);
		}

		if ($uri === &#039;&#039;) {
			return $m[0];
		}

		// if not root/scheme relative and not starts with scheme
		if (!preg_match(&#039;~^(/|[a-z]+\:)~&#039;, $uri)) {
			// URI is file-relative: rewrite depending on options
			if (self::$_prependPath === null) {
				$uri = self::rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks);
			} else {
				$uri = self::$_prependPath . $uri;
				if ($uri[0] === &#039;/&#039;) {
					$root = &#039;&#039;;
					$rootRelative = $uri;
					$uri = $root . self::removeDots($rootRelative);
				} elseif (preg_match(&#039;@^((https?\:)?//([^/]+))/@&#039;, $uri, $m) &amp;&amp; (false !== strpos($m[3], &#039;.&#039;))) {
					$root = $m[1];
					$rootRelative = substr($uri, strlen($root));
					$uri = $root . self::removeDots($rootRelative);
				}
			}
		}

		if ($isImport) {
			return &quot;@import {$quoteChar}{$uri}{$quoteChar}&quot;;
		} else {
			return &quot;url({$quoteChar}{$uri}{$quoteChar})&quot;;
		}
	}

	/**
	 * Mungs some inline SVG URL declarations so they won&#039;t be touched
	 *
	 * @link https://github.com/mrclay/minify/issues/517
	 * @see _unOwlify
	 *
	 * @param string $css
	 * @return string
	 */
	private static function _owlifySvgPaths($css)
	{
		$pattern = &#039;~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)url(\(\s*#\w+\s*\))~&#039;;

		return preg_replace($pattern, &#039;$1owl$2&#039;, $css);
	}

	/**
	 * Undo work of _owlify
	 *
	 * @see _owlifySvgPaths
	 *
	 * @param string $css
	 * @return string
	 */
	private static function _unOwlify($css)
	{
		$pattern = &#039;~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)owl~&#039;;

		return preg_replace($pattern, &#039;$1url&#039;, $css);
	}
}
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