Added 8-digit hex color #132

Author: FlorianRappl

CHANGELOG.md

@@ -11,6 +11,7 @@ Released on tbd.
 - Fixed ordering of rows and columns in `grid` and `grid-gap` (#137)
 - Fixed inclusion of CSS from stylesheets (#140)
 - Added further compactification of CSS tuples (#89, #93)
+- Added support for 8-digit hex color codes (#132)
 
 # 0.17.0
 

src/AngleSharp.Css.Tests/Library/StringRepresentation.cs

@@ -41,13 +41,13 @@ public void SimpleColorWorksWithHexOutput_Issue96()
         }
 
         [Test]
-        public void TransparentColorDoesNotWorkWithHexOutput_Issue96()
+        public void TransparentColorWorksWithHexOutput_Issue132()
         {
             var color = new Color(65, 12, 48, 10);
             Color.UseHex = true;
             var text = color.CssText;
             Color.UseHex = false;
-            Assert.AreEqual("rgba(65, 12, 48, 0.04)", text);
+            Assert.AreEqual("#410C300A", text);
         }
 
         [Test]

src/AngleSharp.Css/Values/Primitives/Color.cs

@@ -395,9 +395,16 @@ public String CssText
                 {
                     return CssKeywords.Invert;
                 }
-                else if (_alpha == 255 && UseHex)
+                else if (UseHex)
                 {
-                    return $"#{_red.ToString("X2", CultureInfo.InvariantCulture)}{_green.ToString("X2", CultureInfo.InvariantCulture)}{_blue.ToString("X2", CultureInfo.InvariantCulture)}";
+                    var color = $"#{_red.ToString("X2", CultureInfo.InvariantCulture)}{_green.ToString("X2", CultureInfo.InvariantCulture)}{_blue.ToString("X2", CultureInfo.InvariantCulture)}";
+
+                    if (_alpha != 255)
+                    {
+                        return $"{color}{_alpha.ToString("X2", CultureInfo.InvariantCulture)}";
+                    }
+
+                    return color;
                 }
                 else
                 {