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Replace begin_styling with a centralized mechanism to set a node up for either styling or restyling.

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We also make sure that an element never has an ElementData with ElementDataStyles::Uninitialized,
and eagerly call prepare_for_styling whenever an ElementData is instantiated.

MozReview-Commit-ID: 9YP6eSmdMt0
This commit is contained in:
Bobby Holley 2016-10-30 20:45:29 -07:00
parent b98bb241dc
commit 71b9004d86
10 changed files with 129 additions and 104 deletions
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47
components/script/layout_wrapper.rs
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@ -56,7 +56,7 @@ use std::mem::transmute;
use std::sync::Arc;
use std::sync::atomic::Ordering;
use string_cache::{Atom, Namespace};
use style::atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
use style::atomic_refcell::{AtomicRef, AtomicRefCell};
use style::attr::AttrValue;
use style::computed_values::display;
use style::context::SharedStyleContext;
@ -252,6 +252,10 @@ impl<'ln> LayoutNode for ServoLayoutNode<'ln> {
self.script_type_id().into()
}
unsafe fn init_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) {
self.get_jsmanaged().init_style_and_layout_data(data);
}
fn has_changed(&self) -> bool {
unsafe { self.node.get_flag(HAS_CHANGED) }
}
@ -269,42 +273,24 @@ impl<'ln> GetLayoutData for ServoLayoutNode<'ln> {
self.get_jsmanaged().get_style_and_layout_data()
}
}
fn init_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) {
unsafe {
self.get_jsmanaged().init_style_and_layout_data(data);
}
}
}
impl<'le> GetLayoutData for ServoLayoutElement<'le> {
fn get_style_and_layout_data(&self) -> Option<OpaqueStyleAndLayoutData> {
self.as_node().get_style_and_layout_data()
}
fn init_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) {
self.as_node().init_style_and_layout_data(data)
}
}
impl<'ln> GetLayoutData for ServoThreadSafeLayoutNode<'ln> {
fn get_style_and_layout_data(&self) -> Option<OpaqueStyleAndLayoutData> {
self.node.get_style_and_layout_data()
}
fn init_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) {
self.node.init_style_and_layout_data(data)
}
}
impl<'le> GetLayoutData for ServoThreadSafeLayoutElement<'le> {
fn get_style_and_layout_data(&self) -> Option<OpaqueStyleAndLayoutData> {
self.element.as_node().get_style_and_layout_data()
}
fn init_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) {
self.element.as_node().init_style_and_layout_data(data)
}
}
impl<'ln> ServoLayoutNode<'ln> {
@ -506,20 +492,11 @@ impl<'le> TElement for ServoLayoutElement<'le> {
old_value - 1
}
fn begin_styling(&self) -> AtomicRefMut<ElementData> {
let mut data = self.mutate_data().unwrap();
data.gather_previous_styles(|| None);
data
}
fn borrow_data(&self) -> Option<AtomicRef<ElementData>> {
self.get_style_data().map(|d| d.borrow())
self.get_data().map(|d| d.borrow())
}
}
impl<'le> LayoutElement for ServoLayoutElement<'le> {
fn get_style_data(&self) -> Option<&AtomicRefCell<ElementData>> {
fn get_data(&self) -> Option<&AtomicRefCell<ElementData>> {
unsafe {
self.get_style_and_layout_data().map(|d| {
let ppld: &AtomicRefCell<PartialPersistentLayoutData> = &**d.ptr;
@ -551,10 +528,6 @@ impl<'le> ServoLayoutElement<'le> {
}
}
fn mutate_data(&self) -> Option<AtomicRefMut<ElementData>> {
self.get_style_data().map(|d| d.borrow_mut())
}
fn get_partial_layout_data(&self) -> Option<&AtomicRefCell<PartialPersistentLayoutData>> {
unsafe {
self.get_style_and_layout_data().map(|d| &**d.ptr)
@ -836,7 +809,7 @@ impl<'ln> ThreadSafeLayoutNode for ServoThreadSafeLayoutNode<'ln> {
// also not visible to script.)
debug_assert!(self.is_text_node());
let parent = self.node.parent_node().unwrap().as_element().unwrap();
let parent_data = parent.get_style_data().unwrap().borrow();
let parent_data = parent.get_data().unwrap().borrow();
parent_data.current_styles().primary.clone()
}
@ -1089,10 +1062,12 @@ impl<'le> ThreadSafeLayoutElement for ServoThreadSafeLayoutElement<'le> {
}
fn get_style_data(&self) -> Option<&AtomicRefCell<ElementData>> {
self.element.get_style_data()
self.element.get_data()
}
}
impl<'le> LayoutElement for ServoLayoutElement<'le> {}
/// This implementation of `::selectors::Element` is used for implementing lazy
/// pseudo-elements.
///