LibWeb: Use IdentifierStyleValue for CSS 'text-transform'

Libraries/LibWeb/CSS/Parser/CSSParser.cpp

@@ -454,6 +454,16 @@ static Optional<CSS::ValueID> value_id_from_string(const String& string)
         return CSS::ValueID::LineThrough;
     if (string.equals_ignoring_case("blink"))
         return CSS::ValueID::Blink;
+    if (string.equals_ignoring_case("capitalize"))
+        return CSS::ValueID::Capitalize;
+    if (string.equals_ignoring_case("uppercase"))
+        return CSS::ValueID::Uppercase;
+    if (string.equals_ignoring_case("lowercase"))
+        return CSS::ValueID::Lowercase;
+    if (string.equals_ignoring_case("full-width"))
+        return CSS::ValueID::FullWidth;
+    if (string.equals_ignoring_case("full-size-kana"))
+        return CSS::ValueID::FullSizeKana;
     if (string.starts_with("-libweb-palette-", CaseSensitivity::CaseInsensitive))
         return value_id_for_palette_string(string.substring_view(16, string.length() - 16));
     return {};

Libraries/LibWeb/CSS/StyleProperties.cpp

@@ -430,4 +430,27 @@ Optional<CSS::TextDecorationLine> StyleProperties::text_decoration_line() const
     }
 }
 
+Optional<CSS::TextTransform> StyleProperties::text_transform() const
+{
+    auto value = property(CSS::PropertyID::TextTransform);
+    if (!value.has_value())
+        return {};
+    switch (value.value()->to_identifier()) {
+    case CSS::ValueID::None:
+        return CSS::TextTransform::None;
+    case CSS::ValueID::Lowercase:
+        return CSS::TextTransform::Lowercase;
+    case CSS::ValueID::Uppercase:
+        return CSS::TextTransform::Uppercase;
+    case CSS::ValueID::Capitalize:
+        return CSS::TextTransform::Capitalize;
+    case CSS::ValueID::FullWidth:
+        return CSS::TextTransform::FullWidth;
+    case CSS::ValueID::FullSizeKana:
+        return CSS::TextTransform::FullSizeKana;
+    default:
+        return {};
+    }
+}
+
 }

Libraries/LibWeb/CSS/StyleProperties.h

@@ -67,6 +67,7 @@ public:
     Optional<CSS::WhiteSpace> white_space() const;
     Optional<CSS::LineStyle> line_style(CSS::PropertyID) const;
     Optional<CSS::TextDecorationLine> text_decoration_line() const;
+    Optional<CSS::TextTransform> text_transform() const;
 
     const Gfx::Font& font() const
     {

Libraries/LibWeb/CSS/StyleValue.h

@@ -151,6 +151,11 @@ enum class ValueID {
     Overline,
     LineThrough,
     Blink,
+    Capitalize,
+    Uppercase,
+    Lowercase,
+    FullWidth,
+    FullSizeKana,
 };
 
 enum class Position {
@@ -177,6 +182,15 @@ enum class TextDecorationLine {
     Blink,
 };
 
+enum class TextTransform {
+    None,
+    Capitalize,
+    Uppercase,
+    Lowercase,
+    FullWidth,
+    FullSizeKana,
+};
+
 enum class Display {
     None,
     Block,