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Hoist RestyleDamage onto TElement.

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Instead of maintaining a dummy restyle damage field for text nodes, we can just
perform the necessary parent inheritance and is_changed adjustments on the fly
in ThreadSafeLayoutNode, simplifying the requirements on the style system.

MozReview-Commit-ID: DCqiCRLsLUF
This commit is contained in:
Bobby Holley 2016-10-25 19:29:32 -07:00
parent a5cabda484
commit 1cfd5e8172
7 changed files with 72 additions and 95 deletions
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8
components/layout/traversal.rs
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@ -16,7 +16,7 @@ use std::mem;
use style::atomic_refcell::AtomicRefCell;
use style::context::{LocalStyleContext, SharedStyleContext, StyleContext};
use style::data::NodeData;
use style::dom::{TNode, TRestyleDamage};
use style::dom::TNode;
use style::selector_impl::ServoSelectorImpl;
use style::traversal::{DomTraversalContext, recalc_style_at, remove_from_bloom_filter};
use style::traversal::RestyleResult;
@ -111,7 +111,7 @@ fn construct_flows_at<'a, N: LayoutNode>(context: &'a LayoutContext<'a>, root: O
// Always reconstruct if incremental layout is turned off.
let nonincremental_layout = opts::get().nonincremental_layout;
if nonincremental_layout || node.has_dirty_descendants() ||
node.restyle_damage() != N::ConcreteRestyleDamage::empty() {
tnode.restyle_damage() != RestyleDamage::empty() {
let mut flow_constructor = FlowConstructor::new(context);
if nonincremental_layout || !flow_constructor.repair_if_possible(&tnode) {
flow_constructor.process(&tnode);
@ -121,9 +121,7 @@ fn construct_flows_at<'a, N: LayoutNode>(context: &'a LayoutContext<'a>, root: O
}
}
// Reset the layout damage in this node. It's been propagated to the
// flow by the flow constructor.
tnode.set_restyle_damage(RestyleDamage::empty());
tnode.clear_restyle_damage();
}
unsafe { node.clear_dirty_bits(); }