A universal selector (`*` in CSS).
@see Selector#to_a
# File lib/sass/selector.rb, line 100 100: def to_a 101: @namespace ? @namespace + ["|*"] : ["*"] 102: end
Unification of a universal selector is somewhat complicated, especially when a namespace is specified. If there is no namespace specified or any namespace is specified (namespace `”*”`), then `sel` is returned without change (unless it’s empty, in which case `”*”` is required).
If a namespace is specified but `sel` does not specify a namespace, then the given namespace is applied to `sel`, either by adding this {Universal} selector or applying this namespace to an existing {Element} selector.
If both this selector and `sel` specify namespaces, those namespaces are unified via {Simple#unify_namespaces} and the unified namespace is used, if possible.
@todo There are lots of cases that this documentation specifies;
make sure we thoroughly test **all of them**.
@todo Keep track of whether a default namespace has been declared
and handle namespace-unspecified selectors accordingly.
@todo If any branch of a CommaSequence ends up being just `”*”`,
then all other branches should be eliminated
@see Selector#unify
# File lib/sass/selector.rb, line 129 129: def unify(sels) 130: name = 131: case sels.first 132: when Universal; :universal 133: when Element; sels.first.name 134: else 135: return [self] + sels unless namespace.nil? || namespace == ['*'] 136: return sels unless sels.empty? 137: return [self] 138: end 139: 140: ns, accept = unify_namespaces(namespace, sels.first.namespace) 141: return unless accept 142: [name == :universal ? Universal.new(ns) : Element.new(name, ns)] + sels[1..1] 143: end
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