adding new filter for css uri rewriting

core/components/modxminify/assetic/src/Assetic/Filter/CSSUriRewriteFilter.php

@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of the Assetic package, an OpenSky project.
+ *
+ * (c) 2010-2014 OpenSky Project Inc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Assetic\Filter;
+
+use Assetic\Asset\AssetInterface;
+
+/**
+ * URI rewrite from mrclay Minify
+ *
+ * @link https://github.com/mrclay/minify/blob/master/lib/Minify/CSS/UriRewriter.php
+ */
+class CSSUriRewriteFilter implements FilterInterface
+{
+    public function filterLoad(AssetInterface $asset)
+    {
+    }
+
+    public function filterDump(AssetInterface $asset)
+    {
+        $sourceBase = $asset->getSourceRoot();
+        $sourcePath = $asset->getSourcePath();
+        $targetPath = $asset->getTargetPath();
+
+        if (null === $sourcePath || null === $targetPath || $sourcePath == $targetPath) {
+            return;
+        }
+
+        $content = \Minify_CSS_UriRewriter::rewrite(
+            $asset->getContent()
+            ,$options['currentDir']
+            ,$options['docRoot']
+            ,$options['symlinks']
+        ); 
+
+        // $asset->setContent(\Minify_CSS_UriRewriter::minify($asset->getContent()));
+    }
+}