1 files changed, 0 insertions, 190 deletions
diff --git a/components/style/invalidation/element/restyle_hints.rs b/components/style/invalidation/element/restyle_hints.rs
deleted file mode 100644
index ffadecd7aa2..00000000000
--- a/components/style/invalidation/element/restyle_hints.rs
+++ /dev/null
@@ -1,190 +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/. */
-
-//! Restyle hints: an optimization to avoid unnecessarily matching selectors.
-
-use crate::traversal_flags::TraversalFlags;
-
-bitflags! {
-    /// The kind of restyle we need to do for a given element.
-    #[repr(C)]
-    pub struct RestyleHint: u16 {
-        /// Do a selector match of the element.
-        const RESTYLE_SELF = 1 << 0;
-
-        /// Do a selector match of the element's pseudo-elements. Always to be combined with
-        /// RESTYLE_SELF.
-        const RESTYLE_PSEUDOS = 1 << 1;
-
-        /// Do a selector match if the element is a pseudo-element.
-        const RESTYLE_SELF_IF_PSEUDO = 1 << 2;
-
-        /// Do a selector match of the element's descendants.
-        const RESTYLE_DESCENDANTS = 1 << 3;
-
-        /// Recascade the current element.
-        const RECASCADE_SELF = 1 << 4;
-
-        /// Recascade the current element if it inherits any reset style.
-        const RECASCADE_SELF_IF_INHERIT_RESET_STYLE = 1 << 5;
-
-        /// Recascade all descendant elements.
-        const RECASCADE_DESCENDANTS = 1 << 6;
-
-        /// Replace the style data coming from CSS transitions without updating
-        /// any other style data. This hint is only processed in animation-only
-        /// traversal which is prior to normal traversal.
-        const RESTYLE_CSS_TRANSITIONS = 1 << 7;
-
-        /// Replace the style data coming from CSS animations without updating
-        /// any other style data. This hint is only processed in animation-only
-        /// traversal which is prior to normal traversal.
-        const RESTYLE_CSS_ANIMATIONS = 1 << 8;
-
-        /// Don't re-run selector-matching on the element, only the style
-        /// attribute has changed, and this change didn't have any other
-        /// dependencies.
-        const RESTYLE_STYLE_ATTRIBUTE = 1 << 9;
-
-        /// Replace the style data coming from SMIL animations without updating
-        /// any other style data. This hint is only processed in animation-only
-        /// traversal which is prior to normal traversal.
-        const RESTYLE_SMIL = 1 << 10;
-    }
-}
-
-impl RestyleHint {
-    /// Creates a new `RestyleHint` indicating that the current element and all
-    /// its descendants must be fully restyled.
-    pub fn restyle_subtree() -> Self {
-        RestyleHint::RESTYLE_SELF | RestyleHint::RESTYLE_DESCENDANTS
-    }
-
-    /// Creates a new `RestyleHint` indicating that the current element and all
-    /// its descendants must be recascaded.
-    pub fn recascade_subtree() -> Self {
-        RestyleHint::RECASCADE_SELF | RestyleHint::RECASCADE_DESCENDANTS
-    }
-
-    /// Returns whether this hint invalidates the element and all its
-    /// descendants.
-    pub fn contains_subtree(&self) -> bool {
-        self.contains(Self::restyle_subtree())
-    }
-
-    /// Returns whether we'll recascade all of the descendants.
-    pub fn will_recascade_subtree(&self) -> bool {
-        self.contains_subtree() || self.contains(Self::recascade_subtree())
-    }
-
-    /// Returns whether we need to restyle this element.
-    pub fn has_non_animation_invalidations(&self) -> bool {
-        !(*self & !Self::for_animations()).is_empty()
-    }
-
-    /// Propagates this restyle hint to a child element.
-    pub fn propagate(&mut self, traversal_flags: &TraversalFlags) -> Self {
-        use std::mem;
-
-        // In the middle of an animation only restyle, we don't need to
-        // propagate any restyle hints, and we need to remove ourselves.
-        if traversal_flags.for_animation_only() {
-            self.remove_animation_hints();
-            return Self::empty();
-        }
-
-        debug_assert!(
-            !self.has_animation_hint(),
-            "There should not be any animation restyle hints \
-             during normal traversal"
-        );
-
-        // Else we should clear ourselves, and return the propagated hint.
-        mem::replace(self, Self::empty()).propagate_for_non_animation_restyle()
-    }
-
-    /// Returns a new `RestyleHint` appropriate for children of the current element.
-    fn propagate_for_non_animation_restyle(&self) -> Self {
-        if self.contains(RestyleHint::RESTYLE_DESCENDANTS) {
-            return Self::restyle_subtree();
-        }
-        let mut result = Self::empty();
-        if self.contains(RestyleHint::RESTYLE_PSEUDOS) {
-            result |= Self::RESTYLE_SELF_IF_PSEUDO;
-        }
-        if self.contains(RestyleHint::RECASCADE_DESCENDANTS) {
-            result |= Self::recascade_subtree();
-        }
-        result
-    }
-
-    /// Returns a hint that contains all the replacement hints.
-    pub fn replacements() -> Self {
-        RestyleHint::RESTYLE_STYLE_ATTRIBUTE | Self::for_animations()
-    }
-
-    /// The replacements for the animation cascade levels.
-    #[inline]
-    pub fn for_animations() -> Self {
-        RestyleHint::RESTYLE_SMIL |
-            RestyleHint::RESTYLE_CSS_ANIMATIONS |
-            RestyleHint::RESTYLE_CSS_TRANSITIONS
-    }
-
-    /// Returns whether the hint specifies that an animation cascade level must
-    /// be replaced.
-    #[inline]
-    pub fn has_animation_hint(&self) -> bool {
-        self.intersects(Self::for_animations())
-    }
-
-    /// Returns whether the hint specifies that an animation cascade level must
-    /// be replaced.
-    #[inline]
-    pub fn has_animation_hint_or_recascade(&self) -> bool {
-        self.intersects(
-            Self::for_animations() |
-                Self::RECASCADE_SELF |
-                Self::RECASCADE_SELF_IF_INHERIT_RESET_STYLE,
-        )
-    }
-
-    /// Returns whether the hint specifies some restyle work other than an
-    /// animation cascade level replacement.
-    #[inline]
-    pub fn has_non_animation_hint(&self) -> bool {
-        !(*self & !Self::for_animations()).is_empty()
-    }
-
-    /// Returns whether the hint specifies that some cascade levels must be
-    /// replaced.
-    #[inline]
-    pub fn has_replacements(&self) -> bool {
-        self.intersects(Self::replacements())
-    }
-
-    /// Removes all of the animation-related hints.
-    #[inline]
-    pub fn remove_animation_hints(&mut self) {
-        self.remove(Self::for_animations());
-
-        // While RECASCADE_SELF is not animation-specific, we only ever add and process it during
-        // traversal.  If we are here, removing animation hints, then we are in an animation-only
-        // traversal, and we know that any RECASCADE_SELF flag must have been set due to changes in
-        // inherited values after restyling for animations, and thus we want to remove it so that
-        // we don't later try to restyle the element during a normal restyle.
-        // (We could have separate RECASCADE_SELF_NORMAL and RECASCADE_SELF_ANIMATIONS flags to
-        // make it clear, but this isn't currently necessary.)
-        self.remove(Self::RECASCADE_SELF | Self::RECASCADE_SELF_IF_INHERIT_RESET_STYLE);
-    }
-}
-
-impl Default for RestyleHint {
-    fn default() -> Self {
-        Self::empty()
-    }
-}
-
-#[cfg(feature = "servo")]
-malloc_size_of_is_0!(RestyleHint);