1 files changed, 0 insertions, 163 deletions
diff --git a/components/selectors/tree.rs b/components/selectors/tree.rs
deleted file mode 100644
index 560b1e61d81..00000000000
--- a/components/selectors/tree.rs
+++ /dev/null
@@ -1,163 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-
-//! Traits that nodes must implement. Breaks the otherwise-cyclic dependency
-//! between layout and style.
-
-use crate::attr::{AttrSelectorOperation, CaseSensitivity, NamespaceConstraint};
-use crate::matching::{ElementSelectorFlags, MatchingContext};
-use crate::parser::SelectorImpl;
-use std::fmt::Debug;
-use std::ptr::NonNull;
-
-/// Opaque representation of an Element, for identity comparisons.
-#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
-pub struct OpaqueElement(NonNull<()>);
-
-unsafe impl Send for OpaqueElement {}
-
-impl OpaqueElement {
-    /// Creates a new OpaqueElement from an arbitrarily-typed pointer.
-    pub fn new<T>(ptr: &T) -> Self {
-        unsafe {
-            OpaqueElement(NonNull::new_unchecked(
-                ptr as *const T as *const () as *mut (),
-            ))
-        }
-    }
-}
-
-pub trait Element: Sized + Clone + Debug {
-    type Impl: SelectorImpl;
-
-    /// Converts self into an opaque representation.
-    fn opaque(&self) -> OpaqueElement;
-
-    fn parent_element(&self) -> Option<Self>;
-
-    /// Whether the parent node of this element is a shadow root.
-    fn parent_node_is_shadow_root(&self) -> bool;
-
-    /// The host of the containing shadow root, if any.
-    fn containing_shadow_host(&self) -> Option<Self>;
-
-    /// The parent of a given pseudo-element, after matching a pseudo-element
-    /// selector.
-    ///
-    /// This is guaranteed to be called in a pseudo-element.
-    fn pseudo_element_originating_element(&self) -> Option<Self> {
-        debug_assert!(self.is_pseudo_element());
-        self.parent_element()
-    }
-
-    /// Whether we're matching on a pseudo-element.
-    fn is_pseudo_element(&self) -> bool;
-
-    /// Skips non-element nodes
-    fn prev_sibling_element(&self) -> Option<Self>;
-
-    /// Skips non-element nodes
-    fn next_sibling_element(&self) -> Option<Self>;
-
-    /// Skips non-element nodes
-    fn first_element_child(&self) -> Option<Self>;
-
-    fn is_html_element_in_html_document(&self) -> bool;
-
-    fn has_local_name(&self, local_name: &<Self::Impl as SelectorImpl>::BorrowedLocalName) -> bool;
-
-    /// Empty string for no namespace
-    fn has_namespace(&self, ns: &<Self::Impl as SelectorImpl>::BorrowedNamespaceUrl) -> bool;
-
-    /// Whether this element and the `other` element have the same local name and namespace.
-    fn is_same_type(&self, other: &Self) -> bool;
-
-    fn attr_matches(
-        &self,
-        ns: &NamespaceConstraint<&<Self::Impl as SelectorImpl>::NamespaceUrl>,
-        local_name: &<Self::Impl as SelectorImpl>::LocalName,
-        operation: &AttrSelectorOperation<&<Self::Impl as SelectorImpl>::AttrValue>,
-    ) -> bool;
-
-    fn has_attr_in_no_namespace(
-        &self,
-        local_name: &<Self::Impl as SelectorImpl>::LocalName,
-    ) -> bool {
-        self.attr_matches(
-            &NamespaceConstraint::Specific(&crate::parser::namespace_empty_string::<Self::Impl>()),
-            local_name,
-            &AttrSelectorOperation::Exists,
-        )
-    }
-
-    fn match_non_ts_pseudo_class(
-        &self,
-        pc: &<Self::Impl as SelectorImpl>::NonTSPseudoClass,
-        context: &mut MatchingContext<Self::Impl>,
-    ) -> bool;
-
-    fn match_pseudo_element(
-        &self,
-        pe: &<Self::Impl as SelectorImpl>::PseudoElement,
-        context: &mut MatchingContext<Self::Impl>,
-    ) -> bool;
-
-    /// Sets selector flags on the elemnt itself or the parent, depending on the
-    /// flags, which indicate what kind of work may need to be performed when
-    /// DOM state changes.
-    fn apply_selector_flags(&self, flags: ElementSelectorFlags);
-
-    /// Whether this element is a `link`.
-    fn is_link(&self) -> bool;
-
-    /// Returns whether the element is an HTML <slot> element.
-    fn is_html_slot_element(&self) -> bool;
-
-    /// Returns the assigned <slot> element this element is assigned to.
-    ///
-    /// Necessary for the `::slotted` pseudo-class.
-    fn assigned_slot(&self) -> Option<Self> {
-        None
-    }
-
-    fn has_id(
-        &self,
-        id: &<Self::Impl as SelectorImpl>::Identifier,
-        case_sensitivity: CaseSensitivity,
-    ) -> bool;
-
-    fn has_class(
-        &self,
-        name: &<Self::Impl as SelectorImpl>::Identifier,
-        case_sensitivity: CaseSensitivity,
-    ) -> bool;
-
-    /// Returns the mapping from the `exportparts` attribute in the reverse
-    /// direction, that is, in an outer-tree -> inner-tree direction.
-    fn imported_part(
-        &self,
-        name: &<Self::Impl as SelectorImpl>::Identifier,
-    ) -> Option<<Self::Impl as SelectorImpl>::Identifier>;
-
-    fn is_part(&self, name: &<Self::Impl as SelectorImpl>::Identifier) -> bool;
-
-    /// Returns whether this element matches `:empty`.
-    ///
-    /// That is, whether it does not contain any child element or any non-zero-length text node.
-    /// See http://dev.w3.org/csswg/selectors-3/#empty-pseudo
-    fn is_empty(&self) -> bool;
-
-    /// Returns whether this element matches `:root`,
-    /// i.e. whether it is the root element of a document.
-    ///
-    /// Note: this can be false even if `.parent_element()` is `None`
-    /// if the parent node is a `DocumentFragment`.
-    fn is_root(&self) -> bool;
-
-    /// Returns whether this element should ignore matching nth child
-    /// selector.
-    fn ignores_nth_child_selectors(&self) -> bool {
-        false
-    }
-}