Core Improvements: Next Round #79 #80

libraries/Gelato/Minify/Minify.php

@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * Gelato Library
+ *
+ * This source file is part of the Gelato Library. More information,
+ * documentation and tutorials can be found at http://gelato.monstra.org
+ *
+ * @package     Gelato
+ *
+ * @author      Romanenko Sergey / Awilum
+ * @copyright   (c) 2013 Romanenko Sergey / Awilum
+ * @since       1.0.0
+ */
+
+class Minify
+{
+    /**
+     * Protected constructor since this is a static class.
+     *
+     * @access  protected
+     */
+    protected function __construct()
+    {
+        // Nothing here
+    }
+
+    /**
+     * Minify html
+     *
+     *  <code>
+     *      echo Minify::html($buffer);
+     *  </code>
+     *
+     * @param  string $buffer html
+     * @return string
+     */
+    public static function html($buffer)
+    {
+        return preg_replace('/^\\s+|\\s+$/m', '', $buffer);
+    }
+
+    /**
+     * Minify css
+     *
+     *  <code>
+     *      echo Minify::css($buffer);
+     *  </code>
+     *
+     * @param  string $buffer css
+     * @return string
+     */
+    public static function css($buffer)
+    {
+        // Remove comments
+        $buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
+
+        // Remove tabs, spaces, newlines, etc.
+        $buffer = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $buffer);
+
+        // Preserve empty comment after '>' http://www.webdevout.net/css-hacks#in_css-selectors
+        $buffer = preg_replace('@>/\\*\\s*\\*/@', '>/*keep*/', $buffer);
+
+        // Preserve empty comment between property and value
+        // http://css-discuss.incutio.com/?page=BoxModelHack
+        $buffer = preg_replace('@/\\*\\s*\\*/\\s*:@', '/*keep*/:', $buffer);
+        $buffer = preg_replace('@:\\s*/\\*\\s*\\*/@', ':/*keep*/', $buffer);
+
+        // Remove ws around { } and last semicolon in declaration block
+        $buffer = preg_replace('/\\s*{\\s*/', '{', $buffer);
+        $buffer = preg_replace('/;?\\s*}\\s*/', '}', $buffer);
+
+        // Remove ws surrounding semicolons
+        $buffer = preg_replace('/\\s*;\\s*/', ';', $buffer);
+
+        // Remove ws around urls
+        $buffer = preg_replace('/url\\(\\s*([^\\)]+?)\\s*\\)/x', 'url($1)', $buffer);
+
+        // Remove ws between rules and colons
+        $buffer = preg_replace('/\\s*([{;])\\s*([\\*_]?[\\w\\-]+)\\s*:\\s*(\\b|[#\'"])/x', '$1$2:$3', $buffer);
+
+        // Minimize hex colors
+        $buffer = preg_replace('/([^=])#([a-f\\d])\\2([a-f\\d])\\3([a-f\\d])\\4([\\s;\\}])/i', '$1#$2$3$4$5', $buffer);
+
+        // Replace any ws involving newlines with a single newline
+        $buffer = preg_replace('/[ \\t]*\\n+\\s*/', "\n", $buffer);
+
+        return $buffer;
+    }
+
+}