mirror of
https://github.com/servo/servo.git
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a3020419d9
This commit adds hooks to the Servo style traversal to avoid traversing all the DOM for every restyle. Additionally it changes the behavior of the dirty flag to be propagated top down, to prevent extra overhead when an element is dirtied. This commit doesn't aim to change the behavior on Servo just yet, since Servo might rely on a full bottom up reconstruction of the flows. I'll need to double check and implement that separately.
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Per-node data used in style calculation.
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use properties::ComputedValues;
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use selector_impl::PseudoElement;
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use std::collections::HashMap;
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use std::hash::BuildHasherDefault;
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use std::sync::Arc;
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use std::sync::atomic::AtomicIsize;
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pub struct PrivateStyleData {
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/// The results of CSS styling for this node.
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pub style: Option<Arc<ComputedValues>>,
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/// The results of CSS styling for each pseudo-element (if any).
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pub per_pseudo: HashMap<PseudoElement, Arc<ComputedValues>,
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BuildHasherDefault<::fnv::FnvHasher>>,
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/// Information needed during parallel traversals.
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pub parallel: DomParallelInfo,
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}
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impl PrivateStyleData {
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pub fn new() -> Self {
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PrivateStyleData {
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style: None,
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per_pseudo: HashMap::with_hasher(Default::default()),
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parallel: DomParallelInfo::new(),
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}
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}
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}
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/// Information that we need stored in each DOM node.
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#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
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pub struct DomParallelInfo {
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/// The number of children that still need work done.
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pub children_to_process: AtomicIsize,
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}
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impl DomParallelInfo {
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pub fn new() -> DomParallelInfo {
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DomParallelInfo {
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children_to_process: AtomicIsize::new(0),
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}
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}
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}
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