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LibWeb/CSS: Simplify parsing of transform-function arguments

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This was duplicating the logic in parse_length_value() and pals, so we
can switch to using those directly.
This commit is contained in:
Sam Atkins 2025-01-06 15:42:05 +00:00
commit f5b716c24d
Notes: github-actions[bot] 2025-01-08 14:30:57 +00:00
1 changed files with 32 additions and 72 deletions
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104
Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -7295,95 +7295,55 @@ RefPtr<CSSStyleValue> Parser::parse_transform_value(TokenStream<ComponentValue>&
TokenStream argument_tokens { arguments[argument_index] };
argument_tokens.discard_whitespace();
auto const& value = argument_tokens.consume_a_token();
RefPtr<CalculatedStyleValue> maybe_calc_value = parse_calculated_value(value);
switch (function_metadata.parameters[argument_index].type) {
case TransformFunctionParameterType::Angle: {
// These are `<angle> | <zero>` in the spec, so we have to check for both kinds.
if (maybe_calc_value && maybe_calc_value->resolves_to_angle()) {
values.append(maybe_calc_value.release_nonnull());
} else if (value.is(Token::Type::Number) && value.token().number_value() == 0) {
values.append(AngleStyleValue::create(Angle::make_degrees(0)));
} else {
// FIXME: Remove this reconsume once all parsing functions are TokenStream-based.
argument_tokens.reconsume_current_input_token();
auto dimension_value = parse_dimension_value(argument_tokens);
if (!dimension_value || !dimension_value->is_angle())
return nullptr;
values.append(dimension_value.release_nonnull());
if (auto angle_value = parse_angle_value(argument_tokens)) {
values.append(angle_value.release_nonnull());
break;
}
break;
if (argument_tokens.next_token().is(Token::Type::Number) && argument_tokens.next_token().token().number_value() == 0) {
argument_tokens.discard_a_token(); // 0
values.append(AngleStyleValue::create(Angle::make_degrees(0)));
break;
}
return nullptr;
}
case TransformFunctionParameterType::Length:
case TransformFunctionParameterType::LengthNone: {
if (maybe_calc_value && maybe_calc_value->resolves_to_length()) {
argument_tokens.discard_a_token(); // calc()
values.append(maybe_calc_value.release_nonnull());
} else {
// FIXME: Remove this reconsume once all parsing functions are TokenStream-based.
argument_tokens.reconsume_current_input_token();
if (function_metadata.parameters[argument_index].type == TransformFunctionParameterType::LengthNone) {
auto keyword_transaction = argument_tokens.begin_transaction();
auto keyword_value = parse_keyword_value(argument_tokens);
if (keyword_value && keyword_value->to_keyword() == Keyword::None) {
values.append(keyword_value.release_nonnull());
keyword_transaction.commit();
break;
}
}
auto dimension_value = parse_dimension_value(argument_tokens);
if (!dimension_value || !dimension_value->is_length())
return nullptr;
values.append(dimension_value.release_nonnull());
if (auto length_value = parse_length_value(argument_tokens)) {
values.append(length_value.release_nonnull());
break;
}
break;
if (function_metadata.parameters[argument_index].type == TransformFunctionParameterType::LengthNone
&& argument_tokens.next_token().is_ident("none"sv)) {
argument_tokens.discard_a_token(); // none
values.append(CSSKeywordValue::create(Keyword::None));
break;
}
return nullptr;
}
case TransformFunctionParameterType::LengthPercentage: {
if (maybe_calc_value && maybe_calc_value->resolves_to_length_percentage()) {
values.append(maybe_calc_value.release_nonnull());
} else {
// FIXME: Remove this reconsume once all parsing functions are TokenStream-based.
argument_tokens.reconsume_current_input_token();
auto dimension_value = parse_dimension_value(argument_tokens);
if (!dimension_value)
return nullptr;
if (dimension_value->is_percentage() || dimension_value->is_length())
values.append(dimension_value.release_nonnull());
else
return nullptr;
if (auto length_percentage_value = parse_length_percentage_value(argument_tokens)) {
values.append(length_percentage_value.release_nonnull());
break;
}
break;
return nullptr;
}
case TransformFunctionParameterType::Number: {
if (maybe_calc_value && maybe_calc_value->resolves_to_number()) {
values.append(maybe_calc_value.release_nonnull());
} else {
// FIXME: Remove this reconsume once all parsing functions are TokenStream-based.
argument_tokens.reconsume_current_input_token();
auto number = parse_number_value(argument_tokens);
if (!number)
return nullptr;
values.append(number.release_nonnull());
if (auto number_value = parse_number_value(argument_tokens)) {
values.append(number_value.release_nonnull());
break;
}
break;
return nullptr;
}
case TransformFunctionParameterType::NumberPercentage: {
if (maybe_calc_value && maybe_calc_value->resolves_to_number()) {
values.append(maybe_calc_value.release_nonnull());
} else {
// FIXME: Remove this reconsume once all parsing functions are TokenStream-based.
argument_tokens.reconsume_current_input_token();
auto number_or_percentage = parse_number_percentage_value(argument_tokens);
if (!number_or_percentage)
return nullptr;
values.append(number_or_percentage.release_nonnull());
if (auto number_percentage_value = parse_number_percentage_value(argument_tokens)) {
values.append(number_percentage_value.release_nonnull());
break;
}
break;
return nullptr;
}
}