LibWeb: Parse shadow values using TokenStream

Author: AtkinsSJ

Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp

@@ -3316,10 +3316,8 @@ RefPtr<StyleValue> Parser::parse_border_radius_shorthand_value(TokenStream<Compo
         { move(top_left_radius), move(top_right_radius), move(bottom_right_radius), move(bottom_left_radius) });
 }
 
-RefPtr<StyleValue> Parser::parse_shadow_value(Vector<ComponentValue> const& component_values, AllowInsetKeyword allow_inset_keyword)
+RefPtr<StyleValue> Parser::parse_shadow_value(TokenStream<ComponentValue>& tokens, AllowInsetKeyword allow_inset_keyword)
 {
-    TokenStream tokens { component_values };
-
     // "none"
     if (contains_single_none_ident(tokens))
         return parse_identifier_value(tokens.next_token());
@@ -5792,7 +5790,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue>> Parser::parse_css_value(Property
             return parsed_value.release_nonnull();
         return ParseError::SyntaxError;
     case PropertyID::BoxShadow:
-        if (auto parsed_value = parse_shadow_value(component_values, AllowInsetKeyword::Yes))
+        if (auto parsed_value = parse_shadow_value(tokens, AllowInsetKeyword::Yes); parsed_value && !tokens.has_next_token())
             return parsed_value.release_nonnull();
         return ParseError::SyntaxError;
     case PropertyID::Content:
@@ -5920,7 +5918,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue>> Parser::parse_css_value(Property
         return ParseError::SyntaxError;
     }
     case PropertyID::TextShadow:
-        if (auto parsed_value = parse_shadow_value(component_values, AllowInsetKeyword::No))
+        if (auto parsed_value = parse_shadow_value(tokens, AllowInsetKeyword::No); parsed_value && !tokens.has_next_token())
             return parsed_value.release_nonnull();
         return ParseError::SyntaxError;
     case PropertyID::Transform:

Userland/Libraries/LibWeb/CSS/Parser/Parser.h

@@ -251,7 +251,7 @@ class Parser {
         No,
         Yes,
     };
-    RefPtr<StyleValue> parse_shadow_value(Vector<ComponentValue> const&, AllowInsetKeyword);
+    RefPtr<StyleValue> parse_shadow_value(TokenStream<ComponentValue>&, AllowInsetKeyword);
     RefPtr<StyleValue> parse_single_shadow_value(TokenStream<ComponentValue>&, AllowInsetKeyword);
     RefPtr<StyleValue> parse_text_decoration_value(Vector<ComponentValue> const&);
     RefPtr<StyleValue> parse_text_decoration_line_value(TokenStream<ComponentValue>&);