57 lines
2.1 KiB
Rust
57 lines
2.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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//! before-change style: the `@starting-style` rules.
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//! https://drafts.csswg.org/css-transitions-2/#defining-before-change-style
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use crate::shared_lock::{DeepCloneWithLock, Locked};
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use crate::shared_lock::{SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
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use crate::str::CssStringWriter;
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use crate::stylesheets::CssRules;
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use cssparser::SourceLocation;
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#[cfg(feature = "gecko")]
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use malloc_size_of::{MallocSizeOfOps, MallocUnconditionalShallowSizeOf};
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use servo_arc::Arc;
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use std::fmt::{self, Debug, Write};
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/// A [`@starting-style`][starting-style] rule.
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///
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/// [starting-style]: https://drafts.csswg.org/css-transitions-2/#at-ruledef-starting-style
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#[derive(Debug, ToShmem)]
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pub struct StartingStyleRule {
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/// The nested rules to this starting-style rule.
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pub rules: Arc<Locked<CssRules>>,
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/// The source position where this starting-style rule was found.
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pub source_location: SourceLocation,
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}
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impl StartingStyleRule {
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/// Measure heap usage.
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#[cfg(feature = "gecko")]
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pub fn size_of(&self, guard: &SharedRwLockReadGuard, ops: &mut MallocSizeOfOps) -> usize {
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self.rules.unconditional_shallow_size_of(ops) +
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self.rules.read_with(guard).size_of(guard, ops)
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}
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}
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impl ToCssWithGuard for StartingStyleRule {
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fn to_css(&self, guard: &SharedRwLockReadGuard, dest: &mut CssStringWriter) -> fmt::Result {
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dest.write_str("@starting-style")?;
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self.rules.read_with(guard).to_css_block(guard, dest)
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}
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}
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impl DeepCloneWithLock for StartingStyleRule {
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fn deep_clone_with_lock(
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&self,
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lock: &SharedRwLock,
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guard: &SharedRwLockReadGuard,
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) -> Self {
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let rules = self.rules.read_with(guard);
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StartingStyleRule {
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rules: Arc::new(lock.wrap(rules.deep_clone_with_lock(lock, guard))),
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source_location: self.source_location.clone(),
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}
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}
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}
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