LibWeb: Invalidate style for tree counting functions when required

We mark any element that relies on tree counting functions as needing a style update when a sibling is inserted/removed.
Author: https://github.com/Calme1709 Commit: 2404f95e03 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6426 Reviewed-by: https://github.com/AtkinsSJ ✅
2025-10-23 16:40:03 +00:00 · 2025-10-06 17:09:22 +13:00 · 2025-10-06 17:09:22 +13:00 · 2404f95e03 · 2025-10-20 15:13:22 +00:00
commit 2404f95e03
parent e9036c7c75
50 changed files with 297 additions and 230 deletions
--- a/Libraries/LibWeb/CSS/Parser/ValueParsing.cpp
+++ b/Libraries/LibWeb/CSS/Parser/ValueParsing.cpp
@ -4188,7 +4188,7 @@ RefPtr<CalculationNode const> Parser::parse_a_calc_function_node(Function const&
    if (auto maybe_function = parse_math_function(function, context)) {
        // NOTE: We have to simplify manually here, since parse_math_function() is a helper for calc() parsing
        //       that doesn't do it directly by itself.
-        return simplify_a_calculation_tree(*maybe_function, context, CalculationResolutionContext {});
+        return simplify_a_calculation_tree(*maybe_function, context, CalculationResolutionContext {}, nullptr);
    }

    return nullptr;
@ -4468,7 +4468,7 @@ RefPtr<CalculationNode const> Parser::parse_a_calculation(Vector<ComponentValue>
        return nullptr;

    // 6. Return the result of simplifying a calculation tree from values.
-    return simplify_a_calculation_tree(*calculation_tree, context, CalculationResolutionContext {});
+    return simplify_a_calculation_tree(*calculation_tree, context, CalculationResolutionContext {}, nullptr);
 }

 // https://drafts.csswg.org/css-values-5/#tree-counting