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LibWeb/CSS: Maintain original form of media-feature ranges

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Previously, for `foo < 30px` ranges, we'd flip them and store them as
`30px > foo` instead. That worked fine, but means the serialization is
wrong. So instead, keep them in their original form.

I experimented with giving Range two optional sub-structs instead of 4
optional members, thinking it would be smaller - but it's actually
larger, because the two Optional<Comparison>s fit snugly together. So,
the slightly-goofy all-Optionals remains.

This gets us 2 WPT passes that I'm aware of.
This commit is contained in:
Sam Atkins 2025-05-22 12:50:03 +01:00
commit 9fe8445946
Notes: github-actions[bot] 2025-05-23 09:19:11 +00:00
5 changed files with 28 additions and 32 deletions
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19
Libraries/LibWeb/CSS/MediaQuery.cpp
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@ -82,10 +82,14 @@ String MediaFeature::to_string() const
return MUST(String::formatted("max-{}: {}", string_from_media_feature_id(m_id), value().to_string()));
case Type::Range: {
auto& range = this->range();
if (!range.right_comparison.has_value())
return MUST(String::formatted("{} {} {}", range.left_value.to_string(), comparison_string(range.left_comparison), string_from_media_feature_id(m_id)));
StringBuilder builder;
if (range.left_comparison.has_value())
builder.appendff("{} {} ", range.left_value->to_string(), comparison_string(*range.left_comparison));
builder.append(string_from_media_feature_id(m_id));
if (range.right_comparison.has_value())
builder.appendff(" {} {}", comparison_string(*range.right_comparison), range.right_value->to_string());
return MUST(String::formatted("{} {} {} {} {}", range.left_value.to_string(), comparison_string(range.left_comparison), string_from_media_feature_id(m_id), comparison_string(*range.right_comparison), range.right_value->to_string()));
return builder.to_string_without_validation();
}
}
@ -137,12 +141,15 @@ MatchResult MediaFeature::evaluate(HTML::Window const* window) const
case Type::Range: {
auto const& range = this->range();
if (auto const left_result = compare(*window, range.left_value, range.left_comparison, queried_value); left_result != MatchResult::True)
return left_result;
if (range.left_comparison.has_value()) {
if (auto const left_result = compare(*window, *range.left_value, *range.left_comparison, queried_value); left_result != MatchResult::True)
return left_result;
}
if (range.right_comparison.has_value())
if (range.right_comparison.has_value()) {
if (auto const right_result = compare(*window, queried_value, *range.right_comparison, *range.right_value); right_result != MatchResult::True)
return right_result;
}
return MatchResult::True;
}