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LibWeb: Don't assume opacity values are CSS numbers
...since they can also be percentages. Better to resolve them to a pair
of absolute values, and then compare those. :^)
Regressed in 921aee8c66
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3 changed files with 15 additions and 2 deletions
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@ -425,8 +425,8 @@ static Element::RequiredInvalidationAfterStyleChange compute_required_invalidati
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// OPTIMIZATION: An element creates a stacking context when its opacity changes from 1 to less than 1
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// and stops to create one when opacity returns to 1. So stacking context tree rebuild is
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// not required for opacity changes within the range below 1.
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auto old_value_opacity = old_value.has_value() ? old_value->style->as_number().number() : 1;
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auto new_value_opacity = new_value.has_value() ? new_value->style->as_number().number() : 1;
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auto old_value_opacity = old_style.opacity();
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auto new_value_opacity = new_style.opacity();
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if (old_value_opacity != new_value_opacity && (old_value_opacity == 1 || new_value_opacity == 1)) {
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invalidation.rebuild_stacking_context_tree = true;
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}
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