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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /servo/components/style/stylesheets/media_rule.rs
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.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/stylesheets/media_rule.rs')
-rw-r--r--servo/components/style/stylesheets/media_rule.rs71
1 files changed, 71 insertions, 0 deletions
diff --git a/servo/components/style/stylesheets/media_rule.rs b/servo/components/style/stylesheets/media_rule.rs
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+/* 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/. */
+
+//! An [`@media`][media] rule.
+//!
+//! [media]: https://drafts.csswg.org/css-conditional/#at-ruledef-media
+
+use crate::media_queries::MediaList;
+use crate::shared_lock::{DeepCloneParams, DeepCloneWithLock, Locked};
+use crate::shared_lock::{SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
+use crate::str::CssStringWriter;
+use crate::stylesheets::CssRules;
+use cssparser::SourceLocation;
+#[cfg(feature = "gecko")]
+use malloc_size_of::{MallocSizeOfOps, MallocUnconditionalShallowSizeOf};
+use servo_arc::Arc;
+use std::fmt::{self, Write};
+use style_traits::{CssWriter, ToCss};
+
+/// An [`@media`][media] rule.
+///
+/// [media]: https://drafts.csswg.org/css-conditional/#at-ruledef-media
+#[derive(Debug, ToShmem)]
+pub struct MediaRule {
+ /// The list of media queries used by this media rule.
+ pub media_queries: Arc<Locked<MediaList>>,
+ /// The nested rules to this media rule.
+ pub rules: Arc<Locked<CssRules>>,
+ /// The source position where this media rule was found.
+ pub source_location: SourceLocation,
+}
+
+impl MediaRule {
+ /// Measure heap usage.
+ #[cfg(feature = "gecko")]
+ pub fn size_of(&self, guard: &SharedRwLockReadGuard, ops: &mut MallocSizeOfOps) -> usize {
+ // Measurement of other fields may be added later.
+ self.rules.unconditional_shallow_size_of(ops) +
+ self.rules.read_with(guard).size_of(guard, ops)
+ }
+}
+
+impl ToCssWithGuard for MediaRule {
+ // Serialization of MediaRule is not specced.
+ // https://drafts.csswg.org/cssom/#serialize-a-css-rule CSSMediaRule
+ fn to_css(&self, guard: &SharedRwLockReadGuard, dest: &mut CssStringWriter) -> fmt::Result {
+ dest.write_str("@media ")?;
+ self.media_queries
+ .read_with(guard)
+ .to_css(&mut CssWriter::new(dest))?;
+ self.rules.read_with(guard).to_css_block(guard, dest)
+ }
+}
+
+impl DeepCloneWithLock for MediaRule {
+ fn deep_clone_with_lock(
+ &self,
+ lock: &SharedRwLock,
+ guard: &SharedRwLockReadGuard,
+ params: &DeepCloneParams,
+ ) -> Self {
+ let media_queries = self.media_queries.read_with(guard);
+ let rules = self.rules.read_with(guard);
+ MediaRule {
+ media_queries: Arc::new(lock.wrap(media_queries.clone())),
+ rules: Arc::new(lock.wrap(rules.deep_clone_with_lock(lock, guard, params))),
+ source_location: self.source_location.clone(),
+ }
+ }
+}