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LibWeb: Spec-comment consume_a_simple_block()
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1 changed files with 24 additions and 4 deletions
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@ -1724,29 +1724,49 @@ StyleComponentValueRule Parser::consume_a_component_value(TokenStream<T>& tokens
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return StyleComponentValueRule(token);
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return StyleComponentValueRule(token);
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}
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}
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// 5.4.8. Consume a simple block
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// https://www.w3.org/TR/css-syntax-3/#consume-simple-block
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template<typename T>
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template<typename T>
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NonnullRefPtr<StyleBlockRule> Parser::consume_a_simple_block(TokenStream<T>& tokens)
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NonnullRefPtr<StyleBlockRule> Parser::consume_a_simple_block(TokenStream<T>& tokens)
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{
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{
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// Note: This algorithm assumes that the current input token has already been checked
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// to be an <{-token>, <[-token>, or <(-token>.
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// To consume a simple block:
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// The ending token is the mirror variant of the current input token.
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// (E.g. if it was called with <[-token>, the ending token is <]-token>.)
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auto ending_token = ((Token)tokens.current_token()).mirror_variant();
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auto ending_token = ((Token)tokens.current_token()).mirror_variant();
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// Create a simple block with its associated token set to the current input token
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// and with its value initially set to an empty list.
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auto block = make_ref_counted<StyleBlockRule>();
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auto block = make_ref_counted<StyleBlockRule>();
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block->m_token = tokens.current_token();
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block->m_token = tokens.current_token();
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// Repeatedly consume the next input token and process it as follows:
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for (;;) {
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for (;;) {
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auto& token = tokens.next_token();
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auto& token = tokens.next_token();
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// ending token
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if (token.is(ending_token)) {
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if (token.is(ending_token)) {
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// Return the block.
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return block;
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return block;
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}
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}
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// <EOF-token>
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if (token.is(Token::Type::EndOfFile)) {
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if (token.is(Token::Type::EndOfFile)) {
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// This is a parse error. Return the block.
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log_parse_error();
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log_parse_error();
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return block;
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return block;
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}
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}
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tokens.reconsume_current_input_token();
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// anything else
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auto value = consume_a_component_value(tokens);
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{
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block->m_values.append(value);
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// Reconsume the current input token.
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tokens.reconsume_current_input_token();
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// Consume a component value and append it to the value of the block.
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block->m_values.append(consume_a_component_value(tokens));
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}
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}
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}
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}
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}
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