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Make parallel DOM traversal and style calculation operate on TNode instead of LayoutNode.

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This commit is contained in:
Bobby Holley 2015-12-31 11:05:17 -08:00
parent 238a8786de
commit ebc5eb1b98
4 changed files with 30 additions and 12 deletions
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9
components/layout/parallel.rs
View file

@ -15,14 +15,13 @@ use gfx::display_list::OpaqueNode;
use profile_traits::time::{self, TimerMetadata, profile};
use std::mem;
use std::sync::atomic::{AtomicIsize, Ordering};
use style::dom::UnsafeNode;
use style::dom::{TNode, UnsafeNode};
use traversal::PostorderNodeMutTraversal;
use traversal::{AssignBSizesAndStoreOverflow, AssignISizes, BubbleISizes};
use traversal::{BuildDisplayList, ComputeAbsolutePositions};
use traversal::{DomTraversal, DomTraversalContext};
use util::opts;
use util::workqueue::{WorkQueue, WorkUnit, WorkerProxy};
use wrapper::LayoutNode;
const CHUNK_SIZE: usize = 64;
@ -236,7 +235,7 @@ impl<'a> ParallelPostorderFlowTraversal for BuildDisplayList<'a> {}
#[inline(always)]
fn top_down_dom<'ln, N, T>(unsafe_nodes: UnsafeNodeList,
proxy: &mut WorkerProxy<SharedLayoutContext, UnsafeNodeList>)
where N: LayoutNode<'ln>, T: DomTraversal<'ln, N> {
where N: TNode<'ln>, T: DomTraversal<'ln, N> {
let shared_layout_context = proxy.user_data();
let layout_context = LayoutContext::new(shared_layout_context);
let traversal_context = DomTraversalContext {
@ -294,7 +293,7 @@ fn top_down_dom<'ln, N, T>(unsafe_nodes: UnsafeNodeList,
fn bottom_up_dom<'ln, N, T>(root: OpaqueNode,
unsafe_node: UnsafeNode,
proxy: &mut WorkerProxy<SharedLayoutContext, UnsafeNodeList>)
where N: LayoutNode<'ln>, T: DomTraversal<'ln, N> {
where N: TNode<'ln>, T: DomTraversal<'ln, N> {
let shared_layout_context = proxy.user_data();
let layout_context = LayoutContext::new(shared_layout_context);
let traversal_context = DomTraversalContext {
@ -388,7 +387,7 @@ pub fn traverse_dom_preorder<'ln, N, T>(
root: N,
shared_layout_context: &SharedLayoutContext,
queue: &mut WorkQueue<SharedLayoutContext, WorkQueueData>)
where N: LayoutNode<'ln>, T: DomTraversal<'ln, N> {
where N: TNode<'ln>, T: DomTraversal<'ln, N> {
run_queue_with_custom_work_data_type(queue, |queue| {
queue.push(WorkUnit {
fun: top_down_dom::<N, T>,

13
components/layout/traversal.rs
View file

@ -15,7 +15,7 @@ use selectors::bloom::BloomFilter;
use std::cell::RefCell;
use std::mem;
use style::context::StyleContext;
use style::dom::{TRestyleDamage, UnsafeNode};
use style::dom::{TNode, TRestyleDamage, UnsafeNode};
use style::matching::{ApplicableDeclarations, ElementMatchMethods, MatchMethods, StyleSharingResult};
use util::opts;
use util::tid::tid;
@ -56,7 +56,7 @@ fn take_task_local_bloom_filter<'ln, N>(parent_node: Option<N>,
root: OpaqueNode,
layout_context: &LayoutContext)
-> Box<BloomFilter>
where N: LayoutNode<'ln> {
where N: TNode<'ln> {
STYLE_BLOOM.with(|style_bloom| {
match (parent_node, style_bloom.borrow_mut().take()) {
// Root node. Needs new bloom filter.
@ -102,7 +102,7 @@ fn put_task_local_bloom_filter(bf: Box<BloomFilter>,
fn insert_ancestors_into_bloom_filter<'ln, N>(bf: &mut Box<BloomFilter>,
mut n: N,
root: OpaqueNode)
where N: LayoutNode<'ln> {
where N: TNode<'ln> {
debug!("[{}] Inserting ancestors.", tid());
let mut ancestors = 0;
loop {
@ -123,7 +123,7 @@ pub struct DomTraversalContext<'a> {
pub root: OpaqueNode,
}
pub trait DomTraversal<'ln, N: LayoutNode<'ln>> {
pub trait DomTraversal<'ln, N: TNode<'ln>> {
fn process_preorder<'a>(context: &'a DomTraversalContext<'a>, node: N);
fn process_postorder<'a>(context: &'a DomTraversalContext<'a>, node: N);
}
@ -132,7 +132,7 @@ pub trait DomTraversal<'ln, N: LayoutNode<'ln>> {
/// This is currently unused, but will be used shortly.
#[allow(dead_code)]
pub struct RecalcStyleOnly;
impl<'ln, N: LayoutNode<'ln>> DomTraversal<'ln, N> for RecalcStyleOnly {
impl<'ln, N: TNode<'ln>> DomTraversal<'ln, N> for RecalcStyleOnly {
fn process_preorder<'a>(context: &'a DomTraversalContext<'a>, node: N) { recalc_style_at(context, node); }
fn process_postorder<'a>(_: &'a DomTraversalContext<'a>, _: N) {}
}
@ -153,7 +153,7 @@ pub trait PostorderNodeMutTraversal<'ln, ConcreteThreadSafeLayoutNode: ThreadSaf
/// layout computation. This computes the styles applied to each node.
#[inline]
#[allow(unsafe_code)]
fn recalc_style_at<'a, 'ln, N: LayoutNode<'ln>> (context: &'a DomTraversalContext<'a>, node: N) {
fn recalc_style_at<'a, 'ln, N: TNode<'ln>> (context: &'a DomTraversalContext<'a>, node: N) {
// Initialize layout data.
//
// FIXME(pcwalton): Stop allocating here. Ideally this should just be done by the HTML
@ -171,7 +171,6 @@ fn recalc_style_at<'a, 'ln, N: LayoutNode<'ln>> (context: &'a DomTraversalContex
// Remove existing CSS styles from nodes whose content has changed (e.g. text changed),
// to force non-incremental reflow.
if node.has_changed() {
let node = node.to_threadsafe();
node.unstyle();
}

12
components/layout/wrapper.rs
View file

@ -275,6 +275,14 @@ impl<'ln> TNode<'ln> for ServoLayoutNode<'ln> {
self.node.next_sibling_ref().map(|node| self.new_with_this_lifetime(&node))
}
}
fn style(&self) -> Ref<Arc<ComputedValues>> {
Ref::map(self.borrow_data().unwrap(), |data| data.style.as_ref().unwrap())
}
fn unstyle(self) {
self.mutate_data().unwrap().style = None;
}
}
impl<'ln> LayoutNode<'ln> for ServoLayoutNode<'ln> {
@ -696,6 +704,8 @@ pub trait ThreadSafeLayoutNode<'ln> : Clone + Copy + Sized {
/// Returns the style results for the given node. If CSS selector matching
/// has not yet been performed, fails.
///
/// Unlike the version on TNode, this handles pseudo-elements.
#[inline]
fn style(&self) -> Ref<Arc<ComputedValues>> {
Ref::map(self.borrow_layout_data().unwrap(), |data| {
@ -709,6 +719,8 @@ pub trait ThreadSafeLayoutNode<'ln> : Clone + Copy + Sized {
}
/// Removes the style from this node.
///
/// Unlike the version on TNode, this handles pseudo-elements.
fn unstyle(self) {
let mut data = self.mutate_layout_data().unwrap();
let style =