From 1249d92065cde96e38902ac471a8a92dc8d0d6a8 Mon Sep 17 00:00:00 2001
From: Ben Thomson <git@alfreido.com>
Date: Fri, 5 Jul 2024 15:19:29 +0800
Subject: [PATCH] Prevent minification of 8 character hex to 3 characters,
 instead minify to 4 characters

---
 src/Assetic/Filter/StylesheetMinifyFilter.php         |  7 +++++--
 .../Test/Filter/StylesheetMinifyFilterTest.php        | 11 +++++++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/Assetic/Filter/StylesheetMinifyFilter.php b/src/Assetic/Filter/StylesheetMinifyFilter.php
index f8ebe65..5830e62 100644
--- a/src/Assetic/Filter/StylesheetMinifyFilter.php
+++ b/src/Assetic/Filter/StylesheetMinifyFilter.php
@@ -2,7 +2,7 @@
 
 namespace Assetic\Filter;
 
-use Assetic\Asset\AssetInterface;
+use Assetic\Contracts\Asset\AssetInterface;
 
 /**
  * Stylesheet Minify Filter
@@ -52,8 +52,11 @@ protected function minify($css)
         // Strips units if value is 0 (converts 0px to 0), ignores values inside ()
         $css = preg_replace('/(:| )(\.?)0(em|ex|px|in|cm|mm|pt|pc)(?![^\(]*\))/i', '${1}0', $css);
 
+        // Shorten 8-character hex color codes to 4-character where possible
+        $css = preg_replace('/#([a-f0-9])\\1([a-f0-9])\\2([a-f0-9])\\3([a-f0-9])\\4/i', '#\1\2\3\4', $css);
+
         // Shortern 6-character hex color codes to 3-character where possible
-        $css = preg_replace('/#([a-f0-9])\\1([a-f0-9])\\2([a-f0-9])\\3/i', '#\1\2\3', $css);
+        $css = preg_replace('/#([a-f0-9])\\1([a-f0-9])\\2([a-f0-9])\\3(?![a-f0-9])/i', '#\1\2\3', $css);
 
         return trim($css);
     }
diff --git a/tests/Assetic/Test/Filter/StylesheetMinifyFilterTest.php b/tests/Assetic/Test/Filter/StylesheetMinifyFilterTest.php
index 004f962..8986e7a 100644
--- a/tests/Assetic/Test/Filter/StylesheetMinifyFilterTest.php
+++ b/tests/Assetic/Test/Filter/StylesheetMinifyFilterTest.php
@@ -131,4 +131,15 @@ public function testAttributeSelectorsWithLess()
 
         $this->assertEquals($output, $mockAsset->getContent());
     }
+
+    public function testHexMinification()
+    {
+        $asset = new \Assetic\Asset\StringAsset('body { color: #00000088; background: #ffffff; border: #012345; box-shadow: 0 0 0 1px #01234567; }');
+        $asset->load();
+
+        $filter = new StylesheetMinifyFilter();
+        $filter->filterDump($asset);
+
+        $this->assertEquals('body{color:#0008;background:#fff;border:#012345;box-shadow:0 0 0 1px #01234567}', $asset->getContent());
+    }
 }