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Make replace_rules_internal return true only if important rules changed.
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2 changed files with 14 additions and 8 deletions
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@ -310,12 +310,14 @@ impl RuleTree {
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level: CascadeLevel,
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pdb: Option<ArcBorrow<Locked<PropertyDeclarationBlock>>>,
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path: &StrongRuleNode,
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guards: &StylesheetGuards)
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guards: &StylesheetGuards,
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important_rules_changed: &mut bool)
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-> Option<StrongRuleNode> {
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debug_assert!(level.is_unique_per_element());
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// TODO(emilio): Being smarter with lifetimes we could avoid a bit of
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// the refcount churn.
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let mut current = path.clone();
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*important_rules_changed = false;
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// First walk up until the first less-or-equally specific rule.
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let mut children = SmallVec::<[_; 10]>::new();
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@ -335,6 +337,8 @@ impl RuleTree {
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// special cases, and replacing them for a `while` loop, avoiding the
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// optimizations).
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if current.get().level == level {
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*important_rules_changed |= level.is_important();
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if let Some(pdb) = pdb {
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// If the only rule at the level we're replacing is exactly the
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// same as `pdb`, we're done, and `path` is still valid.
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