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Bug 1364377: Fix inheritance of NAC, and selector-matching of pseudo-implementing NAC. r=bholley

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MozReview-Commit-ID: DjSyaWHq1Xj
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
This commit is contained in:
Emilio Cobos Álvarez 2017-05-12 12:14:09 +02:00
parent 58253f545b
commit 2ffffcfdce
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GPG key ID: 056B727BB9C1027C
3 changed files with 59 additions and 8 deletions
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15
components/style/dom.rs
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@ -325,6 +325,21 @@ pub trait TElement : Eq + PartialEq + Debug + Hash + Sized + Copy + Clone +
}
}
/// Returns the parent element we should inherit from.
///
/// This is pretty much always the parent element itself, except in the case
/// of Gecko's Native Anonymous Content, which may need to find the closest
/// non-NAC ancestor.
fn inheritance_parent(&self) -> Option<Self> {
self.parent_element()
}
/// For a given NAC element, return the closest non-NAC ancestor, which is
/// guaranteed to exist.
fn closest_non_native_anonymous_ancestor(&self) -> Option<Self> {
unreachable!("Servo doesn't know about NAC");
}
/// Get this element's style attribute.
fn style_attribute(&self) -> Option<&Arc<Locked<PropertyDeclarationBlock>>>;