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Refactor style to be completely backend-independent

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This commit refactors the style crate to be completely independent of
the actual implementation and pseudo-elements supported.

This also adds a gecko backend which introduces parsing for the
anonymous box pseudo-elements[1], although there's still no way of
querying them.

https://mxr.mozilla.org/mozilla-central/source/layout/style/nsCSSAnonBoxList.h
This commit is contained in:
Emilio Cobos Álvarez 2016-02-08 02:53:22 +01:00
parent a164176876
commit dd503dfacb
41 changed files with 767 additions and 310 deletions
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16
components/style/dom.rs
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@ -8,7 +8,8 @@ use data::PrivateStyleData;
use element_state::ElementState;
use properties::{ComputedValues, PropertyDeclaration, PropertyDeclarationBlock};
use restyle_hints::{ElementSnapshot, RESTYLE_DESCENDANTS, RESTYLE_LATER_SIBLINGS, RESTYLE_SELF, RestyleHint};
use selector_impl::ServoSelectorImpl;
use selector_impl::ElementExt;
use selectors::Element;
use selectors::matching::DeclarationBlock;
use smallvec::VecLike;
use std::cell::{Ref, RefMut};
@ -136,15 +137,18 @@ pub trait TNode<'ln> : Sized + Copy + Clone {
/// Borrows the PrivateStyleData without checks.
#[inline(always)]
unsafe fn borrow_data_unchecked(&self) -> Option<*const PrivateStyleData>;
unsafe fn borrow_data_unchecked(&self)
-> Option<*const PrivateStyleData<<Self::ConcreteElement as Element>::Impl>>;
/// Borrows the PrivateStyleData immutably. Fails on a conflicting borrow.
#[inline(always)]
fn borrow_data(&self) -> Option<Ref<PrivateStyleData>>;
fn borrow_data(&self)
-> Option<Ref<PrivateStyleData<<Self::ConcreteElement as Element>::Impl>>>;
/// Borrows the PrivateStyleData mutably. Fails on a conflicting borrow.
#[inline(always)]
fn mutate_data(&self) -> Option<RefMut<PrivateStyleData>>;
fn mutate_data(&self)
-> Option<RefMut<PrivateStyleData<<Self::ConcreteElement as Element>::Impl>>>;
/// Get the description of how to account for recent style changes.
fn restyle_damage(self) -> Self::ConcreteRestyleDamage;
@ -165,7 +169,7 @@ pub trait TNode<'ln> : Sized + Copy + Clone {
/// Returns the style results for the given node. If CSS selector matching
/// has not yet been performed, fails.
fn style(&self) -> Ref<Arc<ComputedValues>> {
fn style(&'ln self) -> Ref<Arc<ComputedValues>> {
Ref::map(self.borrow_data().unwrap(), |data| data.style.as_ref().unwrap())
}
@ -186,7 +190,7 @@ pub trait TDocument<'ld> : Sized + Copy + Clone {
fn drain_modified_elements(&self) -> Vec<(Self::ConcreteElement, ElementSnapshot)>;
}
pub trait TElement<'le> : Sized + Copy + Clone + ::selectors::Element<Impl=ServoSelectorImpl> {
pub trait TElement<'le> : Sized + Copy + Clone + ElementExt {
type ConcreteNode: TNode<'le, ConcreteElement = Self, ConcreteDocument = Self::ConcreteDocument>;
type ConcreteDocument: TDocument<'le, ConcreteNode = Self::ConcreteNode, ConcreteElement = Self>;