1 files changed, 157 insertions, 0 deletions
diff --git a/admin/survey/minify/lib/Minify/YUICompressor.php b/admin/survey/minify/lib/Minify/YUICompressor.php
new file mode 100644
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--- /dev/null
+++ b/admin/survey/minify/lib/Minify/YUICompressor.php
@@ -0,0 +1,157 @@
+<?php
+/**
+ * Class Minify_YUICompressor
+ * @package Minify
+ */
+
+/**
+ * Compress Javascript/CSS using the YUI Compressor
+ *
+ * You must set $jarFile and $tempDir before calling the minify functions.
+ * Also, depending on your shell's environment, you may need to specify
+ * the full path to java in $javaExecutable or use putenv() to setup the
+ * Java environment.
+ *
+ * <code>
+ * Minify_YUICompressor::$jarFile = '/path/to/yuicompressor-2.4.6.jar';
+ * Minify_YUICompressor::$tempDir = '/tmp';
+ * $code = Minify_YUICompressor::minifyJs(
+ *   $code
+ *   ,array('nomunge' => true, 'line-break' => 1000)
+ * );
+ * </code>
+ *
+ * Note: In case you run out stack (default is 512k), you may increase stack size in $options:
+ *   array('stack-size' => '2048k')
+ *
+ * @todo unit tests, $options docs
+ *
+ * @package Minify
+ * @author Stephen Clay <steve@mrclay.org>
+ */
+class Minify_YUICompressor
+{
+
+    /**
+     * Filepath of the YUI Compressor jar file. This must be set before
+     * calling minifyJs() or minifyCss().
+     *
+     * @var string
+     */
+    public static $jarFile;
+
+    /**
+     * Writable temp directory. This must be set before calling minifyJs()
+     * or minifyCss().
+     *
+     * @var string
+     */
+    public static $tempDir;
+
+    /**
+     * Filepath of "java" executable (may be needed if not in shell's PATH)
+     *
+     * @var string
+     */
+    public static $javaExecutable = 'java';
+
+    /**
+     * Minify a Javascript string
+     *
+     * @param string $js
+     *
+     * @param array $options (verbose is ignored)
+     *
+     * @see http://www.julienlecomte.net/yuicompressor/README
+     *
+     * @return string
+     */
+    public static function minifyJs($js, $options = array())
+    {
+        return self::_minify('js', $js, $options);
+    }
+
+    /**
+     * Minify a CSS string
+     *
+     * @param string $css
+     *
+     * @param array $options (verbose is ignored)
+     *
+     * @see http://www.julienlecomte.net/yuicompressor/README
+     *
+     * @return string
+     */
+    public static function minifyCss($css, $options = array())
+    {
+        return self::_minify('css', $css, $options);
+    }
+
+    private static function _minify($type, $content, $options)
+    {
+        self::_prepare();
+        if (! ($tmpFile = tempnam(self::$tempDir, 'yuic_'))) {
+            throw new Exception('Minify_YUICompressor : could not create temp file in "'.self::$tempDir.'".');
+        }
+
+        file_put_contents($tmpFile, $content);
+        exec(self::_getCmd($options, $type, $tmpFile), $output, $result_code);
+        unlink($tmpFile);
+        if ($result_code != 0) {
+            throw new Exception('Minify_YUICompressor : YUI compressor execution failed.');
+        }
+
+        return implode("\n", $output);
+    }
+
+    private static function _getCmd($userOptions, $type, $tmpFile)
+    {
+        $defaults = array(
+            'charset' => '',
+            'line-break' => 5000,
+            'type' => $type,
+            'nomunge' => false,
+            'preserve-semi' => false,
+            'disable-optimizations' => false,
+            'stack-size' => '',
+        );
+        $o = array_merge($defaults, $userOptions);
+
+        $cmd = self::$javaExecutable
+             . (!empty($o['stack-size']) ? ' -Xss' . $o['stack-size'] : '')
+             . ' -jar ' . escapeshellarg(self::$jarFile)
+             . " --type {$type}"
+             . (preg_match('/^[\\da-zA-Z0-9\\-]+$/', $o['charset'])
+                ? " --charset {$o['charset']}"
+                : '')
+             . (is_numeric($o['line-break']) && $o['line-break'] >= 0
+                ? ' --line-break ' . (int)$o['line-break']
+                : '');
+        if ($type === 'js') {
+            foreach (array('nomunge', 'preserve-semi', 'disable-optimizations') as $opt) {
+                $cmd .= $o[$opt]
+                    ? " --{$opt}"
+                    : '';
+            }
+        }
+
+        return $cmd . ' ' . escapeshellarg($tmpFile);
+    }
+
+    private static function _prepare()
+    {
+        if (! is_file(self::$jarFile)) {
+            throw new Exception('Minify_YUICompressor : $jarFile('.self::$jarFile.') is not a valid file.');
+        }
+        if (! is_readable(self::$jarFile)) {
+            throw new Exception('Minify_YUICompressor : $jarFile('.self::$jarFile.') is not readable.');
+        }
+        if (! is_dir(self::$tempDir)) {
+            throw new Exception('Minify_YUICompressor : $tempDir('.self::$tempDir.') is not a valid direcotry.');
+        }
+        if (! is_writable(self::$tempDir)) {
+            throw new Exception('Minify_YUICompressor : $tempDir('.self::$tempDir.') is not writable.');
+        }
+    }
+}
+