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@@ -1770,30 +1770,47 @@ NonnullRefPtr<StyleBlockRule> Parser::consume_a_simple_block(TokenStream<T>& tok
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}
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}
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+// 5.4.9. Consume a function
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+// https://www.w3.org/TR/css-syntax-3/#consume-function
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template<typename T>
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NonnullRefPtr<StyleFunctionRule> Parser::consume_a_function(TokenStream<T>& tokens)
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{
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+ // Note: This algorithm assumes that the current input token has already been checked to be a <function-token>.
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auto name_ident = tokens.current_token();
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VERIFY(name_ident.is(Token::Type::Function));
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+
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+ // To consume a function:
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+
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+ // Create a function with its name equal to the value of the current input token
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+ // and with its value initially set to an empty list.
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auto function = make_ref_counted<StyleFunctionRule>(((Token)name_ident).function());
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+ // Repeatedly consume the next input token and process it as follows:
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for (;;) {
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auto& token = tokens.next_token();
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+
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+ // <)-token>
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if (token.is(Token::Type::CloseParen)) {
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+ // Return the function.
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return function;
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}
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+ // <EOF-token>
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if (token.is(Token::Type::EndOfFile)) {
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+ // This is a parse error. Return the function.
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log_parse_error();
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return function;
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}
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- tokens.reconsume_current_input_token();
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- auto value = consume_a_component_value(tokens);
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- function->m_values.append(value);
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- }
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+ // anything else
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+ {
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+ // Reconsume the current input token.
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+ tokens.reconsume_current_input_token();
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- return function;
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+ // Consume a component value and append the returned value to the function’s value.
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+ function->m_values.append(consume_a_component_value(tokens));
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+ }
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+ }
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}
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// 5.4.6. Consume a declaration
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