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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:44:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:44:51 +0000 |
commit | 9e3c08db40b8916968b9f30096c7be3f00ce9647 (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /servo/components/style/traversal_flags.rs | |
parent | Initial commit. (diff) | |
download | thunderbird-9e3c08db40b8916968b9f30096c7be3f00ce9647.tar.xz thunderbird-9e3c08db40b8916968b9f30096c7be3f00ce9647.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'servo/components/style/traversal_flags.rs')
-rw-r--r-- | servo/components/style/traversal_flags.rs | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/servo/components/style/traversal_flags.rs b/servo/components/style/traversal_flags.rs new file mode 100644 index 0000000000..4bb8e1374a --- /dev/null +++ b/servo/components/style/traversal_flags.rs @@ -0,0 +1,68 @@ +/* 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/. */ + +//! Flags that control the traversal process. +//! +//! We CamelCase rather than UPPER_CASING so that we can grep for the same +//! strings across gecko and servo. +#![allow(non_upper_case_globals)] + +bitflags! { + /// Flags that control the traversal process. + #[derive(Clone, Copy, Eq, PartialEq)] + pub struct TraversalFlags: u32 { + /// Traverse only elements for animation restyles. + const AnimationOnly = 1 << 0; + /// Traverse and update all elements with CSS animations since + /// @keyframes rules may have changed. Triggered by CSS rule changes. + const ForCSSRuleChanges = 1 << 1; + /// The final animation-only traversal, which shouldn't really care about other + /// style changes anymore. + const FinalAnimationTraversal = 1 << 2; + /// Allows the traversal to run in parallel if there are sufficient cores on + /// the machine. + const ParallelTraversal = 1 << 7; + /// Flush throttled animations. By default, we only update throttled animations + /// when we have other non-throttled work to do. With this flag, we + /// unconditionally tick and process them. + const FlushThrottledAnimations = 1 << 8; + + } +} + +/// Asserts that all TraversalFlags flags have a matching ServoTraversalFlags value in gecko. +#[cfg(feature = "gecko")] +#[inline] +pub fn assert_traversal_flags_match() { + use crate::gecko_bindings::structs; + + macro_rules! check_traversal_flags { + ( $( $a:ident => $b:path ),*, ) => { + if cfg!(debug_assertions) { + let mut modes = TraversalFlags::all(); + $( + assert_eq!(structs::$a as usize, $b.bits() as usize, stringify!($b)); + modes.remove($b); + )* + assert_eq!(modes, TraversalFlags::empty(), "all TraversalFlags bits should have an assertion"); + } + } + } + + check_traversal_flags! { + ServoTraversalFlags_AnimationOnly => TraversalFlags::AnimationOnly, + ServoTraversalFlags_ForCSSRuleChanges => TraversalFlags::ForCSSRuleChanges, + ServoTraversalFlags_FinalAnimationTraversal => TraversalFlags::FinalAnimationTraversal, + ServoTraversalFlags_ParallelTraversal => TraversalFlags::ParallelTraversal, + ServoTraversalFlags_FlushThrottledAnimations => TraversalFlags::FlushThrottledAnimations, + } +} + +impl TraversalFlags { + /// Returns true if the traversal is for animation-only restyles. + #[inline] + pub fn for_animation_only(&self) -> bool { + self.contains(TraversalFlags::AnimationOnly) + } +} |