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Make StyleBuilder more efficient using stylearc.

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MozReview-Commit-ID: 8wSsYPEmYE4
This commit is contained in:
Bobby Holley 2017-05-02 11:08:31 -07:00
parent 7b0679848b
commit 7dba36ed73
1 changed files with 6 additions and 6 deletions
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12
components/style/properties/properties.mako.rs
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@ -2056,7 +2056,7 @@ pub enum StyleStructRef<'a, T: 'a> {
/// A borrowed struct from the parent, for example, for inheriting style.
Borrowed(&'a Arc<T>),
/// An owned struct, that we've already mutated.
Owned(T),
Owned(Arc<T>),
}
impl<'a, T: 'a> StyleStructRef<'a, T>
@ -2066,11 +2066,11 @@ impl<'a, T: 'a> StyleStructRef<'a, T>
/// borrowed value, or returning the owned one.
pub fn mutate(&mut self) -> &mut T {
if let StyleStructRef::Borrowed(v) = *self {
*self = StyleStructRef::Owned((**v).clone());
*self = StyleStructRef::Owned(Arc::new((**v).clone()));
}
match *self {
StyleStructRef::Owned(ref mut v) => v,
StyleStructRef::Owned(ref mut v) => Arc::get_mut(v).unwrap(),
StyleStructRef::Borrowed(..) => unreachable!(),
}
}
@ -2079,7 +2079,7 @@ impl<'a, T: 'a> StyleStructRef<'a, T>
/// hasn't been mutated.
pub fn get_if_mutated(&mut self) -> Option<<&mut T> {
match *self {
StyleStructRef::Owned(ref mut v) => Some(v),
StyleStructRef::Owned(ref mut v) => Some(Arc::get_mut(v).unwrap()),
StyleStructRef::Borrowed(..) => None,
}
}
@ -2088,7 +2088,7 @@ impl<'a, T: 'a> StyleStructRef<'a, T>
/// appropriate.
pub fn build(self) -> Arc<T> {
match self {
StyleStructRef::Owned(v) => Arc::new(v),
StyleStructRef::Owned(v) => v,
StyleStructRef::Borrowed(v) => v.clone(),
}
}
@ -2099,7 +2099,7 @@ impl<'a, T: 'a> Deref for StyleStructRef<'a, T> {
fn deref(&self) -> &T {
match *self {
StyleStructRef::Owned(ref v) => v,
StyleStructRef::Owned(ref v) => &**v,
StyleStructRef::Borrowed(v) => &**v,
}
}