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style: Refactor the per_pseudo map from StyleData to avoid having an option value type.

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This make the layout code way clearer.
This commit is contained in:
Emilio Cobos Álvarez 2016-02-12 02:11:44 +01:00
parent a604d605ed
commit 61e04df266
7 changed files with 52 additions and 52 deletions
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13
components/layout/incremental.rs
View file

@ -49,7 +49,7 @@ bitflags! {
}
impl TRestyleDamage for RestyleDamage {
fn compute(old: &Option<Arc<ComputedValues>>, new: &ComputedValues) -> RestyleDamage { compute_damage(old, new) }
fn compute(old: Option<&Arc<ComputedValues>>, new: &ComputedValues) -> RestyleDamage { compute_damage(old, new) }
/// Returns a bitmask that represents a flow that needs to be rebuilt and reflowed.
///
@ -143,12 +143,11 @@ macro_rules! add_if_not_equal(
})
);
pub fn compute_damage(old: &Option<Arc<ComputedValues>>, new: &ComputedValues) -> RestyleDamage {
let old: &ComputedValues =
match old.as_ref() {
None => return RestyleDamage::rebuild_and_reflow(),
Some(cv) => &**cv,
};
pub fn compute_damage(old: Option<&Arc<ComputedValues>>, new: &ComputedValues) -> RestyleDamage {
let old: &ComputedValues = match old {
None => return RestyleDamage::rebuild_and_reflow(),
Some(cv) => &**cv,
};
let mut damage = RestyleDamage::empty();

44
components/layout/wrapper.rs
View file

@ -666,7 +666,8 @@ pub trait ThreadSafeLayoutNode<'ln> : Clone + Copy + Sized {
fn get_before_pseudo(&self) -> Option<Self> {
self.borrow_layout_data().unwrap()
.style_data.per_pseudo
.get(&PseudoElement::Before).unwrap_or(&None).as_ref().map(|style| {
.get(&PseudoElement::Before)
.map(|style| {
self.with_pseudo(PseudoElementType::Before(style.get_box().display))
})
}
@ -675,7 +676,8 @@ pub trait ThreadSafeLayoutNode<'ln> : Clone + Copy + Sized {
fn get_after_pseudo(&self) -> Option<Self> {
self.borrow_layout_data().unwrap()
.style_data.per_pseudo
.get(&PseudoElement::After).unwrap_or(&None).as_ref().map(|style| {
.get(&PseudoElement::After)
.map(|style| {
self.with_pseudo(PseudoElementType::After(style.get_box().display))
})
}
@ -700,11 +702,11 @@ pub trait ThreadSafeLayoutNode<'ln> : Clone + Copy + Sized {
fn style(&self) -> Ref<Arc<ComputedValues>> {
Ref::map(self.borrow_layout_data().unwrap(), |data| {
let style = match self.get_pseudo_element_type() {
PseudoElementType::Before(_) => data.style_data.per_pseudo.get(&PseudoElement::Before).unwrap(),
PseudoElementType::After(_) => data.style_data.per_pseudo.get(&PseudoElement::After).unwrap(),
PseudoElementType::Normal => &data.style_data.style,
PseudoElementType::Before(_) => data.style_data.per_pseudo.get(&PseudoElement::Before),
PseudoElementType::After(_) => data.style_data.per_pseudo.get(&PseudoElement::After),
PseudoElementType::Normal => data.style_data.style.as_ref(),
};
style.as_ref().unwrap()
style.unwrap()
})
}
@ -713,24 +715,18 @@ pub trait ThreadSafeLayoutNode<'ln> : Clone + Copy + Sized {
/// Unlike the version on TNode, this handles pseudo-elements.
fn unstyle(self) {
let mut data = self.mutate_layout_data().unwrap();
let style =
match self.get_pseudo_element_type() {
PseudoElementType::Before(_) => {
match data.style_data.per_pseudo.get_mut(&PseudoElement::Before) {
None => return,
Some(style) => style,
}
}
PseudoElementType::After(_) => {
match data.style_data.per_pseudo.get_mut(&PseudoElement::After) {
None => return,
Some(style) => style,
}
}
PseudoElementType::Normal => &mut data.style_data.style,
};
*style = None;
match self.get_pseudo_element_type() {
PseudoElementType::Before(_) => {
data.style_data.per_pseudo.remove(&PseudoElement::Before);
}
PseudoElementType::After(_) => {
data.style_data.per_pseudo.remove(&PseudoElement::After);
}
PseudoElementType::Normal => {
data.style_data.style = None;
}
};
}
fn is_ignorable_whitespace(&self) -> bool;
@ -953,7 +949,7 @@ impl<'ln> ThreadSafeLayoutNode<'ln> for ServoThreadSafeLayoutNode<'ln> {
data.per_pseudo.get(&PseudoElement::After).unwrap()
};
return match style.as_ref().unwrap().get_box().content {
return match style.as_ref().get_box().content {
content::T::Content(ref value) if !value.is_empty() => {
TextContent::GeneratedContent((*value).clone())
}

2
components/style/animation.rs
View file

@ -979,7 +979,7 @@ pub fn update_style_for_animation<ConcreteRestyleDamage: TRestyleDamage>(animati
let mut new_style = (*style).clone();
animation.property_animation.update(&mut *Arc::make_mut(&mut new_style), progress);
if let Some(damage) = damage {
*damage = *damage | ConcreteRestyleDamage::compute(&Some((*style).clone()), &new_style);
*damage = *damage | ConcreteRestyleDamage::compute(Some(style), &new_style);
}
*style = new_style

2
components/style/data.rs
View file

@ -14,7 +14,7 @@ pub struct PrivateStyleData<Impl: SelectorImpl> {
pub style: Option<Arc<ComputedValues>>,
/// The results of CSS styling for each pseudo-element (if any).
pub per_pseudo: HashMap<Impl::PseudoElement, Option<Arc<ComputedValues>>, BuildHasherDefault<::fnv::FnvHasher>>,
pub per_pseudo: HashMap<Impl::PseudoElement, Arc<ComputedValues>, BuildHasherDefault<::fnv::FnvHasher>>,
/// Information needed during parallel traversals.
pub parallel: DomParallelInfo,

2
components/style/dom.rs
View file

@ -44,7 +44,7 @@ impl OpaqueNode {
}
pub trait TRestyleDamage : BitOr<Output=Self> + Copy {
fn compute(old: &Option<Arc<ComputedValues>>, new: &ComputedValues) -> Self;
fn compute(old: Option<&Arc<ComputedValues>>, new: &ComputedValues) -> Self;
fn rebuild_and_reflow() -> Self;
}

39
components/style/matching.rs
View file

@ -370,16 +370,16 @@ trait PrivateMatchMethods<'ln>: TNode<'ln>
context: &SharedStyleContext<<Self::ConcreteElement as Element>::Impl>,
parent_style: Option<&Arc<ComputedValues>>,
applicable_declarations: &[DeclarationBlock],
style: &mut Option<Arc<ComputedValues>>,
mut style: Option<&mut Arc<ComputedValues>>,
applicable_declarations_cache:
&mut ApplicableDeclarationsCache,
new_animations_sender: &Mutex<Sender<Animation>>,
shareable: bool,
animate_properties: bool)
-> Self::ConcreteRestyleDamage {
-> (Self::ConcreteRestyleDamage, Arc<ComputedValues>) {
let mut cacheable = true;
if animate_properties {
cacheable = !self.update_animations_for_cascade(context, style) && cacheable;
cacheable = !self.update_animations_for_cascade(context, &mut style) && cacheable;
}
let mut this_style;
@ -414,7 +414,7 @@ trait PrivateMatchMethods<'ln>: TNode<'ln>
// Trigger transitions if necessary. This will reset `this_style` back to its old value if
// it did trigger a transition.
if animate_properties {
if let Some(ref style) = *style {
if let Some(ref style) = style {
let animations_started =
animation::start_transitions_if_applicable(new_animations_sender,
self.opaque(),
@ -426,7 +426,7 @@ trait PrivateMatchMethods<'ln>: TNode<'ln>
// Calculate style difference.
let this_style = Arc::new(this_style);
let damage = Self::ConcreteRestyleDamage::compute(style, &*this_style);
let damage = Self::ConcreteRestyleDamage::compute(style.map(|s| &*s), &*this_style);
// Cache the resolved style if it was cacheable.
if cacheable {
@ -434,14 +434,13 @@ trait PrivateMatchMethods<'ln>: TNode<'ln>
this_style.clone());
}
// Write in the final style and return the damage done to our caller.
*style = Some(this_style);
damage
// Return the final style and the damage done to our caller.
(damage, this_style)
}
fn update_animations_for_cascade(&self,
context: &SharedStyleContext<<Self::ConcreteElement as Element>::Impl>,
style: &mut Option<Arc<ComputedValues>>)
style: &mut Option<&mut Arc<ComputedValues>>)
-> bool {
let style = match *style {
None => return false,
@ -572,7 +571,7 @@ pub trait ElementMatchMethods<'le> : TElement<'le>
let node = self.as_node();
let style = &mut node.mutate_data().unwrap().style;
let damage = <<Self as TElement<'le>>::ConcreteNode as TNode<'le>>
::ConcreteRestyleDamage::compute(style, &*shared_style);
::ConcreteRestyleDamage::compute((*style).as_ref(), &*shared_style);
*style = Some(shared_style);
return StyleSharingResult::StyleWasShared(i, damage)
}
@ -666,38 +665,44 @@ pub trait MatchMethods<'ln> : TNode<'ln> {
let cloned_parent_style = parent_style.unwrap().clone();
data.style = Some(cloned_parent_style);
} else {
let mut damage;
{
let damage = {
let mut data_ref = self.mutate_data().unwrap();
let mut data = &mut *data_ref;
damage = self.cascade_node_pseudo_element(
let (mut damage, final_style) = self.cascade_node_pseudo_element(
context,
parent_style,
&applicable_declarations.normal,
&mut data.style,
data.style.as_mut(),
applicable_declarations_cache,
new_animations_sender,
applicable_declarations.normal_shareable,
true);
data.style = Some(final_style);
<Self::ConcreteElement as Element>::Impl::each_eagerly_cascaded_pseudo_element(|pseudo| {
let applicable_declarations_for_this_pseudo =
applicable_declarations.per_pseudo.get(&pseudo).unwrap();
if !applicable_declarations_for_this_pseudo.is_empty() {
damage = damage | self.cascade_node_pseudo_element(
let (new_damage, style) = self.cascade_node_pseudo_element(
context,
Some(data.style.as_ref().unwrap()),
&*applicable_declarations_for_this_pseudo,
data.per_pseudo.entry(pseudo).or_insert(None),
data.per_pseudo.get_mut(&pseudo),
applicable_declarations_cache,
new_animations_sender,
false,
false);
data.per_pseudo.insert(pseudo, style);
damage = damage | new_damage;
}
});
}
damage
};
// This method needs to borrow the data as mutable, so make sure data_ref goes out of
// scope first.

2
ports/geckolib/wrapper.rs
View file

@ -78,7 +78,7 @@ impl<'ln> GeckoNode<'ln> {
#[derive(Clone, Copy)]
pub struct DummyRestyleDamage;
impl TRestyleDamage for DummyRestyleDamage {
fn compute(_: &Option<Arc<ComputedValues>>, _: &ComputedValues) -> Self { DummyRestyleDamage }
fn compute(_: Option<&Arc<ComputedValues>>, _: &ComputedValues) -> Self { DummyRestyleDamage }
fn rebuild_and_reflow() -> Self { DummyRestyleDamage }
}
impl BitOr for DummyRestyleDamage {