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layout: Make incremental reflow more fine-grained by introducing "reflow

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out-of-flow" and "reconstruct flow" damage bits.

This is needed for good performance on the maze solver.
This commit is contained in:
Patrick Walton 2014-10-30 13:27:35 -07:00
parent 7712052e13
commit 08fc7c2795
20 changed files with 644 additions and 403 deletions
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60
components/layout/wrapper.rs
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@ -32,7 +32,9 @@
use context::SharedLayoutContext;
use css::node_style::StyledNode;
use util::{LayoutDataAccess, LayoutDataWrapper, PrivateLayoutData, OpaqueNodeMethods};
use incremental::RestyleDamage;
use util::{LayoutDataAccess, LayoutDataFlags, LayoutDataWrapper, OpaqueNodeMethods};
use util::{PrivateLayoutData};
use gfx::display_list::OpaqueNode;
use script::dom::bindings::cell::{Ref, RefMut};
@ -803,7 +805,17 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
layout_data_wrapper_ref.data.after_style.is_some()
}
/// Borrows the layout data without checking. Fails on a conflicting borrow.
#[inline(always)]
fn borrow_layout_data_unchecked<'a>(&'a self) -> *const Option<LayoutDataWrapper> {
unsafe {
mem::transmute(self.get().layout_data_unchecked())
}
}
/// Borrows the layout data immutably. Fails on a conflicting borrow.
///
/// TODO(pcwalton): Make this private. It will let us avoid borrow flag checks in some cases.
#[inline(always)]
pub fn borrow_layout_data<'a>(&'a self) -> Ref<'a,Option<LayoutDataWrapper>> {
unsafe {
@ -812,6 +824,8 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
}
/// Borrows the layout data mutably. Fails on a conflicting borrow.
///
/// TODO(pcwalton): Make this private. It will let us avoid borrow flag checks in some cases.
#[inline(always)]
pub fn mutate_layout_data<'a>(&'a self) -> RefMut<'a,Option<LayoutDataWrapper>> {
unsafe {
@ -887,6 +901,50 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
}
}
}
/// Get the description of how to account for recent style changes.
/// This is a simple bitfield and fine to copy by value.
pub fn restyle_damage(self) -> RestyleDamage {
let layout_data_ref = self.borrow_layout_data();
layout_data_ref.as_ref().unwrap().data.restyle_damage
}
/// Set the restyle damage field.
pub fn set_restyle_damage(self, damage: RestyleDamage) {
let mut layout_data_ref = self.mutate_layout_data();
match &mut *layout_data_ref {
&Some(ref mut layout_data) => layout_data.data.restyle_damage = damage,
_ => fail!("no layout data for this node"),
}
}
/// Returns the layout data flags for this node.
pub fn flags(self) -> LayoutDataFlags {
unsafe {
match *self.borrow_layout_data_unchecked() {
None => fail!(),
Some(ref layout_data) => layout_data.data.flags,
}
}
}
/// Adds the given flags to this node.
pub fn insert_flags(self, new_flags: LayoutDataFlags) {
let mut layout_data_ref = self.mutate_layout_data();
match &mut *layout_data_ref {
&Some(ref mut layout_data) => layout_data.data.flags.insert(new_flags),
_ => fail!("no layout data for this node"),
}
}
/// Removes the given flags from this node.
pub fn remove_flags(self, flags: LayoutDataFlags) {
let mut layout_data_ref = self.mutate_layout_data();
match &mut *layout_data_ref {
&Some(ref mut layout_data) => layout_data.data.flags.remove(flags),
_ => fail!("no layout data for this node"),
}
}
}
pub struct ThreadSafeLayoutNodeChildrenIterator<'a> {