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style: Use a single RestyleHint representation.

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Differential Revision: https://phabricator.services.mozilla.com/D22828
This commit is contained in:
Emilio Cobos Álvarez 2019-03-14 11:47:50 +00:00
parent 8dbf9b1da9
commit 95ee1a5adf
3 changed files with 11 additions and 77 deletions
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7
components/style/cbindgen.toml
View file

@ -104,6 +104,7 @@ include = [
"TransformOrigin",
"WordBreak",
"Contain",
"RestyleHint",
]
item_types = ["enums", "structs", "typedefs"]
@ -197,3 +198,9 @@ item_types = ["enums", "structs", "typedefs"]
"GenericBorderRadius" = """
inline const StyleLengthPercentage& Get(mozilla::HalfCorner) const;
"""
"RestyleHint" = """
static inline StyleRestyleHint RestyleSubtree();
static inline StyleRestyleHint RecascadeSubtree();
static inline StyleRestyleHint ForAnimations();
"""

8
components/style/gecko/wrapper.rs
View file

@ -44,7 +44,6 @@ use crate::gecko_bindings::bindings::{Gecko_ElementState, Gecko_GetDocumentLWThe
use crate::gecko_bindings::bindings::{Gecko_SetNodeFlags, Gecko_UnsetNodeFlags};
use crate::gecko_bindings::structs;
use crate::gecko_bindings::structs::nsChangeHint;
use crate::gecko_bindings::structs::nsRestyleHint;
use crate::gecko_bindings::structs::Document_DocumentTheme as DocumentTheme;
use crate::gecko_bindings::structs::EffectCompositor_CascadeLevel as CascadeLevel;
use crate::gecko_bindings::structs::ELEMENT_HANDLED_SNAPSHOT;
@ -58,6 +57,7 @@ use crate::gecko_bindings::structs::{RawGeckoElement, RawGeckoNode, RawGeckoXBLB
use crate::gecko_bindings::sugar::ownership::{HasArcFFI, HasSimpleFFI};
use crate::global_style_data::GLOBAL_STYLE_DATA;
use crate::hash::FxHashMap;
use crate::invalidation::element::restyle_hints::RestyleHint;
use crate::logical_geometry::WritingMode;
use crate::media_queries::Device;
use crate::properties::animated_properties::{AnimationValue, AnimationValueMap};
@ -802,11 +802,10 @@ impl<'le> GeckoElement<'le> {
/// Also this function schedules style flush.
pub unsafe fn note_explicit_hints(
&self,
restyle_hint: nsRestyleHint,
restyle_hint: RestyleHint,
change_hint: nsChangeHint,
) {
use crate::gecko::restyle_damage::GeckoRestyleDamage;
use crate::invalidation::element::restyle_hints::RestyleHint;
let damage = GeckoRestyleDamage::new(change_hint);
debug!(
@ -814,7 +813,6 @@ impl<'le> GeckoElement<'le> {
self, restyle_hint, change_hint
);
let restyle_hint: RestyleHint = restyle_hint.into();
debug_assert!(
!(restyle_hint.has_animation_hint() && restyle_hint.has_non_animation_hint()),
"Animation restyle hints should not appear with non-animation restyle hints"
@ -1516,7 +1514,7 @@ impl<'le> TElement for GeckoElement<'le> {
);
unsafe {
self.note_explicit_hints(
nsRestyleHint::eRestyle_Subtree,
RestyleHint::restyle_subtree(),
nsChangeHint::nsChangeHint_Empty,
);
}

73
components/style/invalidation/element/restyle_hints.rs
View file

@ -4,12 +4,11 @@
//! Restyle hints: an optimization to avoid unnecessarily matching selectors.
#[cfg(feature = "gecko")]
use crate::gecko_bindings::structs::nsRestyleHint;
use crate::traversal_flags::TraversalFlags;
bitflags! {
/// The kind of restyle we need to do for a given element.
#[repr(C)]
pub struct RestyleHint: u8 {
/// Do a selector match of the element.
const RESTYLE_SELF = 1 << 0;
@ -190,75 +189,5 @@ impl Default for RestyleHint {
}
}
#[cfg(feature = "gecko")]
impl From<nsRestyleHint> for RestyleHint {
fn from(mut raw: nsRestyleHint) -> Self {
let mut hint = RestyleHint::empty();
debug_assert!(
raw.0 & nsRestyleHint::eRestyle_LaterSiblings.0 == 0,
"Handle later siblings manually if necessary plz."
);
if (raw.0 & (nsRestyleHint::eRestyle_Self.0 | nsRestyleHint::eRestyle_Subtree.0)) != 0 {
raw.0 &= !nsRestyleHint::eRestyle_Self.0;
hint.insert(RestyleHint::RESTYLE_SELF);
}
if (raw.0 & (nsRestyleHint::eRestyle_Subtree.0 | nsRestyleHint::eRestyle_SomeDescendants.0)) !=
0
{
raw.0 &= !nsRestyleHint::eRestyle_Subtree.0;
raw.0 &= !nsRestyleHint::eRestyle_SomeDescendants.0;
hint.insert(RestyleHint::RESTYLE_DESCENDANTS);
}
if (raw.0 & (nsRestyleHint::eRestyle_ForceDescendants.0 | nsRestyleHint::eRestyle_Force.0)) !=
0
{
raw.0 &= !nsRestyleHint::eRestyle_Force.0;
hint.insert(RestyleHint::RECASCADE_SELF);
}
if (raw.0 & nsRestyleHint::eRestyle_ForceDescendants.0) != 0 {
raw.0 &= !nsRestyleHint::eRestyle_ForceDescendants.0;
hint.insert(RestyleHint::RECASCADE_DESCENDANTS);
}
hint.insert(RestyleHint::from_bits_truncate(raw.0 as u8));
hint
}
}
#[cfg(feature = "servo")]
malloc_size_of_is_0!(RestyleHint);
/// Asserts that all replacement hints have a matching nsRestyleHint value.
#[cfg(feature = "gecko")]
#[inline]
pub fn assert_restyle_hints_match() {
use crate::gecko_bindings::structs;
macro_rules! check_restyle_hints {
( $( $a:ident => $b:path),*, ) => {
if cfg!(debug_assertions) {
let mut replacements = RestyleHint::replacements();
$(
assert_eq!(structs::nsRestyleHint::$a.0 as usize, $b.bits() as usize, stringify!($b));
replacements.remove($b);
)*
assert_eq!(replacements, RestyleHint::empty(),
"all RestyleHint replacement bits should have an \
assertion");
}
}
}
check_restyle_hints! {
eRestyle_CSSTransitions => RestyleHint::RESTYLE_CSS_TRANSITIONS,
eRestyle_CSSAnimations => RestyleHint::RESTYLE_CSS_ANIMATIONS,
eRestyle_StyleAttribute => RestyleHint::RESTYLE_STYLE_ATTRIBUTE,
eRestyle_StyleAttribute_Animations => RestyleHint::RESTYLE_SMIL,
}
}