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Account for left-to-right rather than right-to-left precedence of classes in selector maps.

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MozReview-Commit-ID: 8qIl4k3RxaC
This commit is contained in:
Bobby Holley 2017-06-20 11:57:41 -07:00
parent 7f4c846321
commit 1c7f2a9f09
2 changed files with 11 additions and 12 deletions
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17
components/style/selector_map.rs
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@ -369,15 +369,12 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
}
}
/// Searches the selector from right to left, beginning to the left of the
/// ::pseudo-element (if any), and ending at the first combinator.
/// Searches a compound selector from left to right. If the compound selector
/// is a pseudo-element, it's ignored.
///
/// The first non-None value returned from |f| is returned.
///
/// Effectively, pseudo-elements are ignored, given only state pseudo-classes
/// may appear before them.
#[inline(always)]
fn find_from_right<F, R>(mut iter: SelectorIter<SelectorImpl>,
fn find_from_left<F, R>(mut iter: SelectorIter<SelectorImpl>,
mut f: F)
-> Option<R>
where F: FnMut(&Component<SelectorImpl>) -> Option<R>,
@ -388,6 +385,8 @@ fn find_from_right<F, R>(mut iter: SelectorIter<SelectorImpl>,
}
}
// Effectively, pseudo-elements are ignored, given only state pseudo-classes
// may appear before them.
if iter.next_sequence() == Some(Combinator::PseudoElement) {
for ss in &mut iter {
if let Some(r) = f(ss) {
@ -403,7 +402,7 @@ fn find_from_right<F, R>(mut iter: SelectorIter<SelectorImpl>,
#[inline(always)]
pub fn get_id_name(iter: SelectorIter<SelectorImpl>)
-> Option<Atom> {
find_from_right(iter, |ss| {
find_from_left(iter, |ss| {
// TODO(pradeep): Implement case-sensitivity based on the
// document type and quirks mode.
if let Component::ID(ref id) = *ss {
@ -417,7 +416,7 @@ pub fn get_id_name(iter: SelectorIter<SelectorImpl>)
#[inline(always)]
pub fn get_class_name(iter: SelectorIter<SelectorImpl>)
-> Option<Atom> {
find_from_right(iter, |ss| {
find_from_left(iter, |ss| {
// TODO(pradeep): Implement case-sensitivity based on the
// document type and quirks mode.
if let Component::Class(ref class) = *ss {
@ -431,7 +430,7 @@ pub fn get_class_name(iter: SelectorIter<SelectorImpl>)
#[inline(always)]
pub fn get_local_name(iter: SelectorIter<SelectorImpl>)
-> Option<LocalNameSelector<SelectorImpl>> {
find_from_right(iter, |ss| {
find_from_left(iter, |ss| {
if let Component::LocalName(ref n) = *ss {
return Some(LocalNameSelector {
name: n.name.clone(),