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LibWeb: Compute and propagate tree-counting function resolution context

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Tree counting functions should be resolved at style computation time -
to do this we will need to know the element's sibling count and index.

This commit computes that information and propagates it to the various
`StyleValue::to_computed_value` methods.
This commit is contained in:
Callum Law 2025-09-30 16:45:37 +13:00 • committed by Tim Ledbetter
commit 9cd23e3ae5
Notes: github-actions[bot] 2025-10-20 15:13:50 +00:00
9 changed files with 78 additions and 12 deletions
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2
Libraries/LibWeb/CSS/CalculationResolutionContext.h
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@ -19,12 +19,14 @@ struct CalculationResolutionContext {
PercentageBasis percentage_basis {};
Optional<Length::ResolutionContext> length_resolution_context {};
Optional<TreeCountingFunctionResolutionContext> tree_counting_function_resolution_context {};
static CalculationResolutionContext from_computation_context(ComputationContext const& computation_context, PercentageBasis percentage_basis = {})
{
return {
.percentage_basis = percentage_basis,
.length_resolution_context = computation_context.length_resolution_context,
.tree_counting_function_resolution_context = computation_context.tree_counting_function_resolution_context
};
}
};