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Run rustfmt on selectors, servo_arc, and style.

Browse source 
This was generated with:

./mach cargo fmt --package selectors &&
./mach cargo fmt --package servo_arc &&
./mach cargo fmt --package style

Using rustfmt 0.4.1-nightly (a4462d1 2018-03-26)
This commit is contained in:
Bobby Holley 2018-04-10 17:35:15 -07:00
parent f7ae1a37e3
commit c99bcdd4b8
181 changed files with 9981 additions and 7933 deletions
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362
components/style/traversal.rs
View file

@ -4,7 +4,7 @@
//! Traversing the DOM tree; the bloom filter.
use context::{ElementCascadeInputs, StyleContext, SharedStyleContext};
use context::{ElementCascadeInputs, SharedStyleContext, StyleContext};
use data::{ElementData, ElementStyles};
use dom::{NodeInfo, OpaqueNode, TElement, TNode};
use invalidation::element::restyle_hints::RestyleHint;
@ -61,30 +61,32 @@ fn is_servo_nonincremental_layout() -> bool {
/// A DOM Traversal trait, that is used to generically implement styling for
/// Gecko and Servo.
pub trait DomTraversal<E: TElement> : Sync {
pub trait DomTraversal<E: TElement>: Sync {
/// Process `node` on the way down, before its children have been processed.
///
/// The callback is invoked for each child node that should be processed by
/// the traversal.
fn process_preorder<F>(&self,
data: &PerLevelTraversalData,
context: &mut StyleContext<E>,
node: E::ConcreteNode,
note_child: F)
where F: FnMut(E::ConcreteNode);
fn process_preorder<F>(
&self,
data: &PerLevelTraversalData,
context: &mut StyleContext<E>,
node: E::ConcreteNode,
note_child: F,
) where
F: FnMut(E::ConcreteNode);
/// Process `node` on the way up, after its children have been processed.
///
/// This is only executed if `needs_postorder_traversal` returns true.
fn process_postorder(&self,
contect: &mut StyleContext<E>,
node: E::ConcreteNode);
fn process_postorder(&self, contect: &mut StyleContext<E>, node: E::ConcreteNode);
/// Boolean that specifies whether a bottom up traversal should be
/// performed.
///
/// If it's false, then process_postorder has no effect at all.
fn needs_postorder_traversal() -> bool { true }
fn needs_postorder_traversal() -> bool {
true
}
/// Handles the postorder step of the traversal, if it exists, by bubbling
/// up the parent chain.
@ -104,7 +106,7 @@ pub trait DomTraversal<E: TElement> : Sync {
context: &mut StyleContext<E>,
root: OpaqueNode,
mut node: E::ConcreteNode,
children_to_process: isize
children_to_process: isize,
) {
// If the postorder step is a no-op, don't bother.
if !Self::needs_postorder_traversal() {
@ -124,7 +126,7 @@ pub trait DomTraversal<E: TElement> : Sync {
// The parent has other unprocessed descendants. We only
// perform postorder processing after the last descendant
// has been processed.
break
break;
}
node = parent.as_node();
@ -132,7 +134,8 @@ pub trait DomTraversal<E: TElement> : Sync {
} else {
// Otherwise record the number of children to process when the time
// comes.
node.as_element().unwrap()
node.as_element()
.unwrap()
.store_children_to_process(children_to_process);
}
}
@ -141,10 +144,7 @@ pub trait DomTraversal<E: TElement> : Sync {
/// However, this mechanism can't handle style invalidations on the root. As
/// such, we have a pre-traversal step to handle that part and determine whether
/// a full traversal is needed.
fn pre_traverse(
root: E,
shared_context: &SharedStyleContext,
) -> PreTraverseToken<E> {
fn pre_traverse(root: E, shared_context: &SharedStyleContext) -> PreTraverseToken<E> {
let traversal_flags = shared_context.traversal_flags;
let mut data = root.mutate_data();
@ -162,20 +162,18 @@ pub trait DomTraversal<E: TElement> : Sync {
);
if invalidation_result.has_invalidated_siblings() {
let actual_root = root.traversal_parent()
.expect("How in the world can you invalidate \
siblings without a parent?");
let actual_root = root.traversal_parent().expect(
"How in the world can you invalidate \
siblings without a parent?",
);
unsafe { actual_root.set_dirty_descendants() }
return PreTraverseToken(Some(actual_root));
}
}
}
let should_traverse = Self::element_needs_traversal(
root,
traversal_flags,
data.as_mut().map(|d| &**d),
);
let should_traverse =
Self::element_needs_traversal(root, traversal_flags, data.as_mut().map(|d| &**d));
// If we're not going to traverse at all, we may need to clear some state
// off the root (which would normally be done at the end of recalc_style_at).
@ -200,16 +198,21 @@ pub trait DomTraversal<E: TElement> : Sync {
traversal_flags: TraversalFlags,
data: Option<&ElementData>,
) -> bool {
debug!("element_needs_traversal({:?}, {:?}, {:?})",
el, traversal_flags, data);
debug!(
"element_needs_traversal({:?}, {:?}, {:?})",
el, traversal_flags, data
);
// In case of animation-only traversal we need to traverse the element
// if the element has animation only dirty descendants bit,
// animation-only restyle hint or recascade.
if traversal_flags.for_animation_only() {
return data.map_or(false, |d| d.has_styles()) &&
(el.has_animation_only_dirty_descendants() ||
data.as_ref().unwrap().hint.has_animation_hint_or_recascade());
(el.has_animation_only_dirty_descendants() ||
data.as_ref()
.unwrap()
.hint
.has_animation_hint_or_recascade());
}
// Non-incremental layout visits every node.
@ -276,8 +279,7 @@ pub trait DomTraversal<E: TElement> : Sync {
// likely to load valid bindings, we avoid wasted work here, which may
// be a very big perf hit when elements with bindings are nested
// heavily.
if cfg!(feature = "gecko") &&
is_initial_style &&
if cfg!(feature = "gecko") && is_initial_style &&
parent_data.styles.primary().has_moz_binding()
{
debug!("Parent {:?} has XBL binding, deferring traversal", parent);
@ -306,10 +308,12 @@ where
{
use style_resolver::StyleResolverForElement;
debug_assert!(rule_inclusion == RuleInclusion::DefaultOnly ||
pseudo.map_or(false, |p| p.is_before_or_after()) ||
element.borrow_data().map_or(true, |d| !d.has_styles()),
"Why are we here?");
debug_assert!(
rule_inclusion == RuleInclusion::DefaultOnly ||
pseudo.map_or(false, |p| p.is_before_or_after()) ||
element.borrow_data().map_or(true, |d| !d.has_styles()),
"Why are we here?"
);
let mut ancestors_requiring_style_resolution = SmallVec::<[E; 16]>::new();
// Clear the bloom filter, just in case the caller is reusing TLS.
@ -343,9 +347,7 @@ where
}
ancestor = ancestor.unwrap().traversal_parent();
layout_parent_style = ancestor.map(|a| {
a.borrow_data().unwrap().styles.primary().clone()
});
layout_parent_style = ancestor.map(|a| a.borrow_data().unwrap().styles.primary().clone());
}
for ancestor in ancestors_requiring_style_resolution.iter().rev() {
@ -353,12 +355,15 @@ where
// Actually `PseudoElementResolution` doesn't really matter here.
// (but it does matter below!).
let primary_style =
StyleResolverForElement::new(*ancestor, context, rule_inclusion, PseudoElementResolution::IfApplicable)
.resolve_primary_style(
style.as_ref().map(|s| &**s),
layout_parent_style.as_ref().map(|s| &**s)
);
let primary_style = StyleResolverForElement::new(
*ancestor,
context,
rule_inclusion,
PseudoElementResolution::IfApplicable,
).resolve_primary_style(
style.as_ref().map(|s| &**s),
layout_parent_style.as_ref().map(|s| &**s),
);
let is_display_contents = primary_style.style().is_display_contents();
@ -371,11 +376,16 @@ where
}
context.thread_local.bloom_filter.assert_complete(element);
StyleResolverForElement::new(element, context, rule_inclusion, PseudoElementResolution::Force)
.resolve_style(
style.as_ref().map(|s| &**s),
layout_parent_style.as_ref().map(|s| &**s)
).into()
StyleResolverForElement::new(
element,
context,
rule_inclusion,
PseudoElementResolution::Force,
).resolve_style(
style.as_ref().map(|s| &**s),
layout_parent_style.as_ref().map(|s| &**s),
)
.into()
}
/// Calculates the style for a single node.
@ -388,8 +398,7 @@ pub fn recalc_style_at<E, D, F>(
element: E,
data: &mut ElementData,
note_child: F,
)
where
) where
E: TElement,
D: DomTraversal<E>,
F: FnMut(E::ConcreteNode),
@ -401,22 +410,28 @@ where
let is_initial_style = !data.has_styles();
context.thread_local.statistics.elements_traversed += 1;
debug_assert!(flags.intersects(TraversalFlags::AnimationOnly) ||
!element.has_snapshot() || element.handled_snapshot(),
"Should've handled snapshots here already");
debug_assert!(
flags.intersects(TraversalFlags::AnimationOnly) || !element.has_snapshot() ||
element.handled_snapshot(),
"Should've handled snapshots here already"
);
let compute_self = !element.has_current_styles_for_traversal(data, flags);
debug!("recalc_style_at: {:?} (compute_self={:?}, \
dirty_descendants={:?}, data={:?})",
element, compute_self, element.has_dirty_descendants(), data);
debug!(
"recalc_style_at: {:?} (compute_self={:?}, \
dirty_descendants={:?}, data={:?})",
element,
compute_self,
element.has_dirty_descendants(),
data
);
let mut child_cascade_requirement = ChildCascadeRequirement::CanSkipCascade;
// Compute style for this element if necessary.
if compute_self {
child_cascade_requirement =
compute_style(traversal_data, context, element, data);
child_cascade_requirement = compute_style(traversal_data, context, element, data);
if element.is_native_anonymous() {
// We must always cascade native anonymous subtrees, since they inherit
@ -430,9 +445,13 @@ where
// If we're restyling this element to display:none, throw away all style
// data in the subtree, notify the caller to early-return.
if data.styles.is_display_none() {
debug!("{:?} style is display:none - clearing data from descendants.",
element);
unsafe { clear_descendant_data(element); }
debug!(
"{:?} style is display:none - clearing data from descendants.",
element
);
unsafe {
clear_descendant_data(element);
}
}
// Inform any paint worklets of changed style, to speculatively
@ -448,28 +467,32 @@ where
// those operations and compute the propagated restyle hint (unless we're
// not processing invalidations, in which case don't need to propagate it
// and must avoid clearing it).
debug_assert!(flags.for_animation_only() ||
!data.hint.has_animation_hint(),
"animation restyle hint should be handled during \
animation-only restyles");
debug_assert!(
flags.for_animation_only() || !data.hint.has_animation_hint(),
"animation restyle hint should be handled during \
animation-only restyles"
);
let propagated_hint = data.hint.propagate(&flags);
trace!("propagated_hint={:?}, cascade_requirement={:?}, \
is_display_none={:?}, implementing_pseudo={:?}",
propagated_hint,
child_cascade_requirement,
data.styles.is_display_none(),
element.implemented_pseudo_element());
debug_assert!(element.has_current_styles_for_traversal(data, flags),
"Should have computed style or haven't yet valid computed \
style in case of animation-only restyle");
trace!(
"propagated_hint={:?}, cascade_requirement={:?}, \
is_display_none={:?}, implementing_pseudo={:?}",
propagated_hint,
child_cascade_requirement,
data.styles.is_display_none(),
element.implemented_pseudo_element()
);
debug_assert!(
element.has_current_styles_for_traversal(data, flags),
"Should have computed style or haven't yet valid computed \
style in case of animation-only restyle"
);
let has_dirty_descendants_for_this_restyle =
if flags.for_animation_only() {
element.has_animation_only_dirty_descendants()
} else {
element.has_dirty_descendants()
};
let has_dirty_descendants_for_this_restyle = if flags.for_animation_only() {
element.has_animation_only_dirty_descendants()
} else {
element.has_dirty_descendants()
};
// Before examining each child individually, try to prove that our children
// don't need style processing. They need processing if any of the following
@ -483,14 +506,12 @@ where
// Additionally, there are a few scenarios where we avoid traversing the
// subtree even if descendant styles are out of date. These cases are
// enumerated in should_cull_subtree().
let mut traverse_children =
has_dirty_descendants_for_this_restyle ||
let mut traverse_children = has_dirty_descendants_for_this_restyle ||
!propagated_hint.is_empty() ||
!child_cascade_requirement.can_skip_cascade() ||
is_servo_nonincremental_layout();
traverse_children =
traverse_children &&
traverse_children = traverse_children &&
!traversal.should_cull_subtree(context, element, &data, is_initial_style);
// Examine our children, and enqueue the appropriate ones for traversal.
@ -502,7 +523,7 @@ where
propagated_hint,
child_cascade_requirement,
is_initial_style,
note_child
note_child,
);
}
@ -512,18 +533,15 @@ where
debug_assert!(!element.has_animation_only_dirty_descendants());
}
debug_assert!(flags.for_animation_only() ||
!flags.contains(TraversalFlags::ClearDirtyBits) ||
!element.has_animation_only_dirty_descendants(),
"Should have cleared animation bits already");
debug_assert!(
flags.for_animation_only() || !flags.contains(TraversalFlags::ClearDirtyBits) ||
!element.has_animation_only_dirty_descendants(),
"Should have cleared animation bits already"
);
clear_state_after_traversing(element, data, flags);
}
fn clear_state_after_traversing<E>(
element: E,
data: &mut ElementData,
flags: TraversalFlags
)
fn clear_state_after_traversing<E>(element: E, data: &mut ElementData, flags: TraversalFlags)
where
E: TElement,
{
@ -536,13 +554,19 @@ where
// Clear dirty bits as appropriate.
if flags.for_animation_only() {
if flags.intersects(TraversalFlags::ClearDirtyBits | TraversalFlags::ClearAnimationOnlyDirtyDescendants) {
unsafe { element.unset_animation_only_dirty_descendants(); }
if flags.intersects(
TraversalFlags::ClearDirtyBits | TraversalFlags::ClearAnimationOnlyDirtyDescendants,
) {
unsafe {
element.unset_animation_only_dirty_descendants();
}
}
} else if flags.contains(TraversalFlags::ClearDirtyBits) {
// The animation traversal happens first, so we don't need to guard against
// clearing the animation bit on the regular traversal.
unsafe { element.clear_dirty_bits(); }
unsafe {
element.clear_dirty_bits();
}
}
}
@ -550,7 +574,7 @@ fn compute_style<E>(
traversal_data: &PerLevelTraversalData,
context: &mut StyleContext<E>,
element: E,
data: &mut ElementData
data: &mut ElementData,
) -> ChildCascadeRequirement
where
E: TElement,
@ -569,13 +593,16 @@ where
let mut important_rules_changed = false;
let new_styles = match kind {
MatchAndCascade => {
debug_assert!(!context.shared.traversal_flags.for_animation_only(),
"MatchAndCascade shouldn't be processed during \
animation-only traversal");
debug_assert!(
!context.shared.traversal_flags.for_animation_only(),
"MatchAndCascade shouldn't be processed during \
animation-only traversal"
);
// Ensure the bloom filter is up to date.
context.thread_local.bloom_filter
.insert_parents_recovering(element,
traversal_data.current_dom_depth);
context
.thread_local
.bloom_filter
.insert_parents_recovering(element, traversal_data.current_dom_depth);
context.thread_local.bloom_filter.assert_complete(element);
debug_assert_eq!(
@ -594,18 +621,17 @@ where
Some(shared_styles) => {
context.thread_local.statistics.styles_shared += 1;
shared_styles
}
},
None => {
context.thread_local.statistics.elements_matched += 1;
// Perform the matching and cascading.
let new_styles = {
let mut resolver =
StyleResolverForElement::new(
element,
context,
RuleInclusion::All,
PseudoElementResolution::IfApplicable
);
let mut resolver = StyleResolverForElement::new(
element,
context,
RuleInclusion::All,
PseudoElementResolution::IfApplicable,
);
resolver.resolve_style_with_default_parents()
};
@ -618,40 +644,35 @@ where
);
new_styles
}
},
}
}
},
CascadeWithReplacements(flags) => {
// Skipping full matching, load cascade inputs from previous values.
let mut cascade_inputs =
ElementCascadeInputs::new_from_element_data(data);
important_rules_changed =
element.replace_rules(flags, context, &mut cascade_inputs);
let mut cascade_inputs = ElementCascadeInputs::new_from_element_data(data);
important_rules_changed = element.replace_rules(flags, context, &mut cascade_inputs);
let mut resolver =
StyleResolverForElement::new(
let mut resolver = StyleResolverForElement::new(
element,
context,
RuleInclusion::All,
PseudoElementResolution::IfApplicable,
);
resolver.cascade_styles_with_default_parents(cascade_inputs)
},
CascadeOnly => {
// Skipping full matching, load cascade inputs from previous values.
let cascade_inputs = ElementCascadeInputs::new_from_element_data(data);
let new_styles = {
let mut resolver = StyleResolverForElement::new(
element,
context,
RuleInclusion::All,
PseudoElementResolution::IfApplicable
PseudoElementResolution::IfApplicable,
);
resolver.cascade_styles_with_default_parents(cascade_inputs)
}
CascadeOnly => {
// Skipping full matching, load cascade inputs from previous values.
let cascade_inputs =
ElementCascadeInputs::new_from_element_data(data);
let new_styles = {
let mut resolver =
StyleResolverForElement::new(
element,
context,
RuleInclusion::All,
PseudoElementResolution::IfApplicable
);
resolver.cascade_styles_with_default_parents(cascade_inputs)
};
@ -680,15 +701,10 @@ where
}
new_styles
}
},
};
element.finish_restyle(
context,
data,
new_styles,
important_rules_changed
)
element.finish_restyle(context, data, new_styles, important_rules_changed)
}
#[cfg(feature = "servo")]
@ -707,18 +723,23 @@ where
if let Some(ref values) = data.styles.primary {
for image in &values.get_background().background_image.0 {
let (name, arguments) = match *image {
Either::Second(Image::PaintWorklet(ref worklet)) => (&worklet.name, &worklet.arguments),
Either::Second(Image::PaintWorklet(ref worklet)) => {
(&worklet.name, &worklet.arguments)
},
_ => continue,
};
let painter = match context.shared.registered_speculative_painters.get(name) {
Some(painter) => painter,
None => continue,
};
let properties = painter.properties().iter()
let properties = painter
.properties()
.iter()
.filter_map(|(name, id)| id.as_shorthand().err().map(|id| (name, id)))
.map(|(name, id)| (name.clone(), values.computed_value_to_string(id)))
.collect();
let arguments = arguments.iter()
let arguments = arguments
.iter()
.map(|argument| argument.to_css_string())
.collect();
debug!("Notifying paint worklet {}.", painter.name());
@ -743,8 +764,7 @@ fn note_children<E, D, F>(
cascade_requirement: ChildCascadeRequirement,
is_initial_style: bool,
mut note_child: F,
)
where
) where
E: TElement,
D: DomTraversal<E>,
F: FnMut(E::ConcreteNode),
@ -758,7 +778,8 @@ where
Some(el) => el,
None => {
if is_servo_nonincremental_layout() ||
D::text_node_needs_traversal(child_node, data) {
D::text_node_needs_traversal(child_node, data)
{
note_child(child_node);
}
continue;
@ -767,28 +788,35 @@ where
let mut child_data = child.mutate_data();
let mut child_data = child_data.as_mut().map(|d| &mut **d);
trace!(" > {:?} -> {:?} + {:?}, pseudo: {:?}",
child,
child_data.as_ref().map(|d| d.hint),
propagated_hint,
child.implemented_pseudo_element());
trace!(
" > {:?} -> {:?} + {:?}, pseudo: {:?}",
child,
child_data.as_ref().map(|d| d.hint),
propagated_hint,
child.implemented_pseudo_element()
);
if let Some(ref mut child_data) = child_data {
let mut child_hint = propagated_hint;
match cascade_requirement {
ChildCascadeRequirement::CanSkipCascade => {}
ChildCascadeRequirement::CanSkipCascade => {},
ChildCascadeRequirement::MustCascadeDescendants => {
child_hint |= RestyleHint::RECASCADE_SELF | RestyleHint::RECASCADE_DESCENDANTS;
}
},
ChildCascadeRequirement::MustCascadeChildrenIfInheritResetStyle => {
use properties::computed_value_flags::ComputedValueFlags;
if child_data.styles.primary().flags.contains(ComputedValueFlags::INHERITS_RESET_STYLE) {
if child_data
.styles
.primary()
.flags
.contains(ComputedValueFlags::INHERITS_RESET_STYLE)
{
child_hint |= RestyleHint::RECASCADE_SELF;
}
}
},
ChildCascadeRequirement::MustCascadeChildren => {
child_hint |= RestyleHint::RECASCADE_SELF;
}
},
}
child_data.hint.insert(child_hint);
@ -815,9 +843,13 @@ where
// recalc_style_at if requested by the caller.
if !is_initial_style {
if flags.for_animation_only() {
unsafe { element.set_animation_only_dirty_descendants(); }
unsafe {
element.set_animation_only_dirty_descendants();
}
} else {
unsafe { element.set_dirty_descendants(); }
unsafe {
element.set_dirty_descendants();
}
}
}
}