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style: Add infrastructure to match :host.

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This commit is contained in:
Emilio Cobos Álvarez 2018-03-08 22:03:42 +01:00
parent 1654f297ca
commit 9fa2618197
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9 changed files with 159 additions and 41 deletions
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16
components/layout_thread/dom_wrapper.rs
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@ -659,6 +659,14 @@ impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
}
}
fn parent_node_is_shadow_root(&self) -> bool {
false
}
fn containing_shadow_host(&self) -> Option<Self> {
None
}
fn first_child_element(&self) -> Option<ServoLayoutElement<'le>> {
self.as_node().dom_children().filter_map(|n| n.as_element()).next()
}
@ -1199,6 +1207,14 @@ impl<'le> ::selectors::Element for ServoThreadSafeLayoutElement<'le> {
None
}
fn parent_node_is_shadow_root(&self) -> bool {
false
}
fn containing_shadow_host(&self) -> Option<Self> {
None
}
fn first_child_element(&self) -> Option<Self> {
warn!("ServoThreadSafeLayoutElement::first_child_element called");
None