From 15151d7a4c7c9138f960a8687224a52ff3722931 Mon Sep 17 00:00:00 2001
From: Shannon Booth <shannon.ml.booth@gmail.com>
Date: Sun, 28 May 2023 15:01:54 +1200
Subject: [PATCH] LibGfx: Add Color::from_named_css_color_string

This is factored out from Color::from_string and determines the color
only from performing an ASCII case-insensitive search over the named
CSS colors.
---
 Userland/Libraries/LibGfx/Color.cpp | 20 ++++++++++++++++----
 Userland/Libraries/LibGfx/Color.h   |  1 +
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/Userland/Libraries/LibGfx/Color.cpp b/Userland/Libraries/LibGfx/Color.cpp
index a599e59cd2..e4323e67f1 100644
--- a/Userland/Libraries/LibGfx/Color.cpp
+++ b/Userland/Libraries/LibGfx/Color.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2019-2023, Shannon Booth <shannon.ml.booth@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -78,7 +79,7 @@ static Optional<Color> parse_rgba_color(StringView string)
     return Color(r, g, b, a);
 }
 
-Optional<Color> Color::from_string(StringView string)
+Optional<Color> Color::from_named_css_color_string(StringView string)
 {
     if (string.is_empty())
         return {};
@@ -243,14 +244,25 @@ Optional<Color> Color::from_string(StringView string)
         WebColor { 0x663399, "rebeccapurple"sv },
     };
 
-    if (string.equals_ignoring_ascii_case("transparent"sv))
-        return Color::from_argb(0x00000000);
-
     for (auto const& web_color : web_colors) {
         if (string.equals_ignoring_ascii_case(web_color.name))
             return Color::from_rgb(web_color.color);
     }
 
+    return {};
+}
+
+Optional<Color> Color::from_string(StringView string)
+{
+    if (string.is_empty())
+        return {};
+
+    if (string.equals_ignoring_ascii_case("transparent"sv))
+        return Color::from_argb(0x00000000);
+
+    if (auto const color = from_named_css_color_string(string); color.has_value())
+        return color;
+
     if (string.starts_with("rgb("sv, CaseSensitivity::CaseInsensitive) && string.ends_with(')'))
         return parse_rgb_color(string);
 
diff --git a/Userland/Libraries/LibGfx/Color.h b/Userland/Libraries/LibGfx/Color.h
index 6f01981cb8..3f4ea9f4e2 100644
--- a/Userland/Libraries/LibGfx/Color.h
+++ b/Userland/Libraries/LibGfx/Color.h
@@ -378,6 +378,7 @@ public:
     DeprecatedString to_deprecated_string() const;
     DeprecatedString to_deprecated_string_without_alpha() const;
     static Optional<Color> from_string(StringView);
+    static Optional<Color> from_named_css_color_string(StringView);
 
     constexpr HSV to_hsv() const
     {