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style: Remove support for XBL resources.

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So much unsound code going away :-)

Differential Revision: https://phabricator.services.mozilla.com/D28380
This commit is contained in:
Emilio Cobos Álvarez 2019-04-23 16:43:15 +00:00
parent 50312e1457
commit e5b5cd78a9
10 changed files with 22 additions and 208 deletions
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45
components/style/dom.rs
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@ -761,7 +761,7 @@ pub trait TElement:
/// Returns the anonymous content for the current element's XBL binding,
/// given if any.
///
/// This is used in Gecko for XBL and shadow DOM.
/// This is used in Gecko for XBL.
fn xbl_binding_anonymous_content(&self) -> Option<Self::ConcreteNode> {
None
}
@ -772,11 +772,6 @@ pub trait TElement:
/// The shadow root which roots the subtree this element is contained in.
fn containing_shadow(&self) -> Option<<Self::ConcreteNode as TNode>::ConcreteShadowRoot>;
/// XBL hack for style sharing. :(
fn has_same_xbl_proto_binding_as(&self, _other: Self) -> bool {
true
}
/// Return the element which we can use to look up rules in the selector
/// maps.
///
@ -792,56 +787,34 @@ pub trait TElement:
}
}
/// Implements Gecko's `nsBindingManager::WalkRules`.
///
/// Returns whether to cut off the binding inheritance, that is, whether
/// document rules should _not_ apply.
fn each_xbl_cascade_data<'a, F>(&self, _: F) -> bool
where
Self: 'a,
F: FnMut(&'a CascadeData, QuirksMode),
{
false
}
/// Executes the callback for each applicable style rule data which isn't
/// the main document's data (which stores UA / author rules).
///
/// The element passed to the callback is the containing shadow host for the
/// data if it comes from Shadow DOM, None if it comes from XBL.
/// data if it comes from Shadow DOM.
///
/// Returns whether normal document author rules should apply.
fn each_applicable_non_document_style_rule_data<'a, F>(&self, mut f: F) -> bool
where
Self: 'a,
F: FnMut(&'a CascadeData, QuirksMode, Option<Self>),
F: FnMut(&'a CascadeData, Self),
{
use rule_collector::containing_shadow_ignoring_svg_use;
let mut doc_rules_apply = !self.each_xbl_cascade_data(|data, quirks_mode| {
f(data, quirks_mode, None);
});
let mut doc_rules_apply = self.matches_user_and_author_rules();
// Use the same rules to look for the containing host as we do for rule
// collection.
if let Some(shadow) = containing_shadow_ignoring_svg_use(*self) {
doc_rules_apply = false;
if let Some(data) = shadow.style_data() {
f(
data,
self.as_node().owner_doc().quirks_mode(),
Some(shadow.host()),
);
f(data, shadow.host());
}
}
if let Some(shadow) = self.shadow_root() {
if let Some(data) = shadow.style_data() {
f(
data,
self.as_node().owner_doc().quirks_mode(),
Some(shadow.host()),
);
f(data, shadow.host());
}
}
@ -850,11 +823,7 @@ pub trait TElement:
// Slots can only have assigned nodes when in a shadow tree.
let shadow = slot.containing_shadow().unwrap();
if let Some(data) = shadow.style_data() {
f(
data,
self.as_node().owner_doc().quirks_mode(),
Some(shadow.host()),
);
f(data, shadow.host());
}
current = slot.assigned_slot();
}