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LibWeb/CSS: Wrap calc()-resolution data in a struct

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Initially I added this to the existing CalculationContext, but in
reality, we have some data at parse-time and different data at
resolve-time, so it made more sense to keep those separate.

Instead of needing a variety of methods for resolving a Foo, depending
on whether we have a Layout::Node available, or a percentage basis, or
a length resolution context... put those in a
CalculationResolutionContext, and just pass that one thing to these
methods. This also removes the need for separate resolve_*_percentage()
methods, because we can just pass the percentage basis in to the regular
resolve_foo() method.

This also corrects the issue that *any* calculation may need to resolve
lengths, but we previously only passed a length resolution context to
specific types in some situations. Now, they can all have one available,
though it's up to the caller to provide it.
This commit is contained in:
Sam Atkins 2025-01-22 16:05:32 +00:00 • committed by Andreas Kling
commit 1d71662f31
Notes: github-actions[bot] 2025-01-30 18:33:58 +00:00
18 changed files with 256 additions and 309 deletions
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5
Libraries/LibWeb/Layout/Node.cpp
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@ -787,7 +787,7 @@ void NodeWithStyle::apply_style(CSS::ComputedProperties const& computed_style)
computed_values.set_transition_delay(transition_delay.time());
} else if (transition_delay_property.is_calculated()) {
auto const& transition_delay = transition_delay_property.as_calculated();
computed_values.set_transition_delay(transition_delay.resolve_time().value());
computed_values.set_transition_delay(transition_delay.resolve_time({ .length_resolution_context = CSS::Length::ResolutionContext::for_layout_node(*this) }).value());
}
auto do_border_style = [&](CSS::BorderData& border, CSS::PropertyID width_property, CSS::PropertyID color_property, CSS::PropertyID style_property) {
@ -808,7 +808,8 @@ void NodeWithStyle::apply_style(CSS::ComputedProperties const& computed_style)
auto resolve_border_width = [&]() -> CSSPixels {
auto const& value = computed_style.property(width_property);
if (value.is_calculated())
return max(CSSPixels { 0 }, value.as_calculated().resolve_length(*this)->to_px(*this));
return max(CSSPixels { 0 },
value.as_calculated().resolve_length({ .length_resolution_context = CSS::Length::ResolutionContext::for_layout_node(*this) })->to_px(*this));
if (value.is_length())
return value.as_length().length().to_px(*this);
if (value.is_keyword()) {