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Make DOM own the style and layout data, in an UnsafeCell

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The previous Cell was a lie.
This commit is contained in:
Anthony Ramine 2020-04-03 18:54:11 +02:00
parent 516e8e0aa6
commit 185a402d9c
17 changed files with 74 additions and 180 deletions
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28
components/layout/wrapper.rs
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@ -39,24 +39,22 @@ use style::selector_parser::RestyleDamage;
use style::values::computed::counters::ContentItem;
use style::values::generics::counters::Content;
pub trait LayoutNodeLayoutData {
/// Similar to borrow_data*, but returns the full PersistentLayoutData rather
/// than only the style::data::ElementData.
fn borrow_layout_data(&self) -> Option<AtomicRef<LayoutData>>;
fn mutate_layout_data(&self) -> Option<AtomicRefMut<LayoutData>>;
pub trait LayoutNodeLayoutData<'dom> {
fn borrow_layout_data(self) -> Option<AtomicRef<'dom, LayoutData>>;
fn mutate_layout_data(self) -> Option<AtomicRefMut<'dom, LayoutData>>;
fn flow_debug_id(self) -> usize;
}
impl<'dom, T> LayoutNodeLayoutData for T
impl<'dom, T> LayoutNodeLayoutData<'dom> for T
where
T: GetLayoutData<'dom>,
{
fn borrow_layout_data(&self) -> Option<AtomicRef<LayoutData>> {
unsafe { self.get_raw_data().map(|d| d.layout_data.borrow()) }
fn borrow_layout_data(self) -> Option<AtomicRef<'dom, LayoutData>> {
self.get_raw_data().map(|d| d.layout_data.borrow())
}
fn mutate_layout_data(&self) -> Option<AtomicRefMut<LayoutData>> {
unsafe { self.get_raw_data().map(|d| d.layout_data.borrow_mut()) }
fn mutate_layout_data(self) -> Option<AtomicRefMut<'dom, LayoutData>> {
self.get_raw_data().map(|d| d.layout_data.borrow_mut())
}
fn flow_debug_id(self) -> usize {
@ -65,15 +63,15 @@ where
}
}
pub trait GetRawData {
unsafe fn get_raw_data(&self) -> Option<&StyleAndLayoutData>;
pub trait GetRawData<'dom> {
fn get_raw_data(self) -> Option<&'dom StyleAndLayoutData>;
}
impl<'dom, T> GetRawData for T
impl<'dom, T> GetRawData<'dom> for T
where
T: GetLayoutData<'dom>,
{
unsafe fn get_raw_data(&self) -> Option<&StyleAndLayoutData> {
fn get_raw_data(self) -> Option<&'dom StyleAndLayoutData> {
self.get_style_and_layout_data()
.map(|opaque| opaque.downcast_ref().unwrap())
}
@ -144,7 +142,7 @@ where
debug_assert!(node.is_element());
}
let damage = unsafe {
let damage = {
let data = node.get_raw_data().unwrap();
if !data