1 files changed, 217 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/ImportProcessor.php b/admin/survey/minify/lib/Minify/ImportProcessor.php
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+++ b/admin/survey/minify/lib/Minify/ImportProcessor.php
@@ -0,0 +1,217 @@
+<?php
+/**
+ * Class Minify_ImportProcessor
+ * @package Minify
+ */
+
+/**
+ * Linearize a CSS/JS file by including content specified by CSS import
+ * declarations. In CSS files, relative URIs are fixed.
+ *
+ * @imports will be processed regardless of where they appear in the source
+ * files; i.e. @imports commented out or in string content will still be
+ * processed!
+ *
+ * This has a unit test but should be considered "experimental".
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ * @author Simon Schick <simonsimcity@gmail.com>
+ */
+class Minify_ImportProcessor
+{
+    public static $filesIncluded = array();
+
+    public static function process($file)
+    {
+        self::$filesIncluded = array();
+        self::$_isCss = (strtolower(substr($file, -4)) === '.css');
+        $obj = new Minify_ImportProcessor(dirname($file));
+
+        return $obj->_getContent($file);
+    }
+
+    // allows callback funcs to know the current directory
+    private $_currentDir;
+
+    // allows callback funcs to know the directory of the file that inherits this one
+    private $_previewsDir;
+
+    // allows _importCB to write the fetched content back to the obj
+    private $_importedContent = '';
+
+    private static $_isCss;
+
+    /**
+     * @param String $currentDir
+     * @param String $previewsDir Is only used internally
+     */
+    private function __construct($currentDir, $previewsDir = "")
+    {
+        $this->_currentDir = $currentDir;
+        $this->_previewsDir = $previewsDir;
+    }
+
+    private function _getContent($file, $is_imported = false)
+    {
+        $file = preg_replace('~\\?.*~', '', $file);
+        $file = realpath($file);
+        if (! $file
+            || in_array($file, self::$filesIncluded)
+            || false === ($content = @file_get_contents($file))) {
+            // file missing, already included, or failed read
+            return '';
+        }
+        self::$filesIncluded[] = realpath($file);
+        $this->_currentDir = dirname($file);
+
+        // remove UTF-8 BOM if present
+        if (pack("CCC",0xef,0xbb,0xbf) === substr($content, 0, 3)) {
+            $content = substr($content, 3);
+        }
+        // ensure uniform EOLs
+        $content = str_replace("\r\n", "\n", $content);
+
+        // process @imports
+        $pattern = '/
+                @import\\s+
+                (?:url\\(\\s*)?      # maybe url(
+                [\'"]?               # maybe quote
+                (.*?)                # 1 = URI
+                [\'"]?               # maybe end quote
+                (?:\\s*\\))?         # maybe )
+                ([a-zA-Z,\\s]*)?     # 2 = media list
+                ;                    # end token
+            /x';
+        $content = preg_replace_callback($pattern, array($this, '_importCB'), $content);
+
+        // You only need to rework the import-path if the script is imported
+        if (self::$_isCss && $is_imported) {
+            // rewrite remaining relative URIs
+            $pattern = '/url\\(\\s*([^\\)\\s]+)\\s*\\)/';
+            $content = preg_replace_callback($pattern, array($this, '_urlCB'), $content);
+        }
+
+        return $this->_importedContent . $content;
+    }
+
+    private function _importCB($m)
+    {
+        $url = $m[1];
+        $mediaList = preg_replace('/\\s+/', '', $m[2]);
+
+        if (strpos($url, '://') > 0) {
+            // protocol, leave in place for CSS, comment for JS
+            return self::$_isCss
+                ? $m[0]
+                : "/* Minify_ImportProcessor will not include remote content */";
+        }
+        if ('/' === $url[0]) {
+            // protocol-relative or root path
+            $url = ltrim($url, '/');
+            $file = realpath($_SERVER['DOCUMENT_ROOT']) . DIRECTORY_SEPARATOR
+                . strtr($url, '/', DIRECTORY_SEPARATOR);
+        } else {
+            // relative to current path
+            $file = $this->_currentDir . DIRECTORY_SEPARATOR
+                . strtr($url, '/', DIRECTORY_SEPARATOR);
+        }
+        $obj = new Minify_ImportProcessor(dirname($file), $this->_currentDir);
+        $content = $obj->_getContent($file, true);
+        if ('' === $content) {
+            // failed. leave in place for CSS, comment for JS
+            return self::$_isCss
+                ? $m[0]
+                : "/* Minify_ImportProcessor could not fetch '{$file}' */";
+        }
+
+        return (!self::$_isCss || preg_match('@(?:^$|\\ball\\b)@', $mediaList))
+            ? $content
+            : "@media {$mediaList} {\n{$content}\n}\n";
+    }
+
+    private function _urlCB($m)
+    {
+        // $m[1] is either quoted or not
+        $quote = ($m[1][0] === "'" || $m[1][0] === '"') ? $m[1][0] : '';
+
+        $url = ($quote === '') ? $m[1] : substr($m[1], 1, strlen($m[1]) - 2);
+
+        if ('/' !== $url[0]) {
+            if (strpos($url, '//') > 0) {
+                // probably starts with protocol, do not alter
+            } else {
+                // prepend path with current dir separator (OS-independent)
+                $path = $this->_currentDir
+                    . DIRECTORY_SEPARATOR . strtr($url, '/', DIRECTORY_SEPARATOR);
+                // update the relative path by the directory of the file that imported this one
+                $url = self::getPathDiff(realpath($this->_previewsDir), $path);
+            }
+        }
+
+        return "url({$quote}{$url}{$quote})";
+    }
+
+    /**
+     * @param string $from
+     * @param string $to
+     * @param string $ps
+     * @return string
+     */
+    private function getPathDiff($from, $to, $ps = DIRECTORY_SEPARATOR)
+    {
+        $realFrom = $this->truepath($from);
+        $realTo = $this->truepath($to);
+
+        $arFrom = explode($ps, rtrim($realFrom, $ps));
+        $arTo = explode($ps, rtrim($realTo, $ps));
+        while (count($arFrom) && count($arTo) && ($arFrom[0] == $arTo[0])) {
+            array_shift($arFrom);
+            array_shift($arTo);
+        }
+
+        return str_pad("", count($arFrom) * 3, '..' . $ps) . implode($ps, $arTo);
+    }
+
+    /**
+     * This function is to replace PHP's extremely buggy realpath().
+     * @param string $path The original path, can be relative etc.
+     * @return string The resolved path, it might not exist.
+     * @see http://stackoverflow.com/questions/4049856/replace-phps-realpath
+     */
+    private function truepath($path)
+    {
+        // whether $path is unix or not
+        $unipath = ('' === $path) || ($path{0} !== '/');
+
+        // attempts to detect if path is relative in which case, add cwd
+        if (strpos($path, ':') === false && $unipath) {
+            $path = $this->_currentDir . DIRECTORY_SEPARATOR . $path;
+        }
+
+        // resolve path parts (single dot, double dot and double delimiters)
+        $path = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $path);
+        $parts = array_filter(explode(DIRECTORY_SEPARATOR, $path), 'strlen');
+        $absolutes = array();
+        foreach ($parts as $part) {
+            if ('.' === $part) {
+                continue;
+            }
+            if ('..' === $part) {
+                array_pop($absolutes);
+            } else {
+                $absolutes[] = $part;
+            }
+        }
+
+        $path = implode(DIRECTORY_SEPARATOR, $absolutes);
+        // resolve any symlinks
+        if (file_exists($path) && linkinfo($path) > 0) {
+            $path = readlink($path);
+        }
+        // put initial separator that could have been lost
+        $path = !$unipath ? '/' . $path : $path;
+
+        return $path;
+    }
+}