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style: Add invalidation support for ::slotted().

Browse source 
Bug: 1424607
Reviewed-by: heycam
MozReview-Commit-ID: 8pIVUx27o7x
This commit is contained in:
Emilio Cobos Álvarez 2017-12-17 17:56:15 +01:00
parent 040379208e
commit b26f3280d2
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GPG key ID: 056B727BB9C1027C
7 changed files with 294 additions and 110 deletions
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39
components/style/gecko/wrapper.rs
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@ -610,10 +610,7 @@ impl<'le> GeckoElement<'le> {
self.as_node().node_info().mInner.mNamespaceID
}
fn is_html_element(&self) -> bool {
self.namespace_id() == (structs::root::kNameSpaceID_XHTML as i32)
}
#[inline]
fn is_xul_element(&self) -> bool {
self.namespace_id() == (structs::root::kNameSpaceID_XUL as i32)
}
@ -974,6 +971,40 @@ impl<'le> TElement for GeckoElement<'le> {
self.as_node().owner_doc().as_node()
}
#[inline]
fn is_html_element(&self) -> bool {
self.namespace_id() == (structs::root::kNameSpaceID_XHTML as i32)
}
/// Return the list of slotted nodes of this node.
#[inline]
fn slotted_nodes(&self) -> &[Self::ConcreteNode] {
if !self.is_html_slot_element() || !self.is_in_shadow_tree() {
return &[];
}
let slot: &structs::HTMLSlotElement = unsafe {
mem::transmute(self.0)
};
if cfg!(debug_assertions) {
let base: &RawGeckoElement = &slot._base._base._base._base;
assert_eq!(base as *const _, self.0 as *const _, "Bad cast");
}
let assigned_nodes: &[structs::RefPtr<structs::nsINode>] =
&*slot.mAssignedNodes;
debug_assert_eq!(
mem::size_of::<structs::RefPtr<structs::nsINode>>(),
mem::size_of::<Self::ConcreteNode>(),
"Bad cast!"
);
unsafe { mem::transmute(assigned_nodes) }
}
/// Execute `f` for each anonymous content child element (apart from
/// ::before and ::after) whose originating element is `self`.
fn each_anonymous_content_child<F>(&self, mut f: F)