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Add _mustUnify.

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This commit is contained in:
Natalie Weizenbaum 2016-08-12 17:12:16 -07:00
parent b9c6a1dc4e
commit 8d396cc465
1 changed files with 20 additions and 0 deletions
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20
lib/src/extend/extender.dart
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@ -396,6 +396,26 @@ class Extender {
}
}
bool _mustUnify(List<ComplexSelectorComponent> complex1,
List<ComplexSelectorComponent> complex2) {
var uniqueSelectors = new Set<SimpleSelector>();
for (var component in complex1) {
if (component is CompoundSelector) {
uniqueSelectors.addAll(component.components.where(_isUnique));
}
}
if (uniqueSelectors.isEmpty) return false;
return complex2.any((component) =>
component is CompoundSelector &&
component.components.any((simple) =>
_isUnique(simple) && uniqueSelectors.contains(simple)));
}
bool _isUnique(SimpleSelector simple) =>
simple is IDSelector ||
(simple is PseudoSelector && simple.type == PseudoType.element);
List<List/*<T>*/> _chunks/*<T>*/(Queue/*<T>*/ queue1,
Queue/*<T>*/ queue2, bool done(Queue/*<T>*/ queue)) {
var chunk1 = /*<T>*/[];