1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/* 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 http://mozilla.org/MPL/2.0/. */
//! An [`@media`][media] urle.
//!
//! [media]: https://drafts.csswg.org/css-conditional/#at-ruledef-media
use cssparser::SourceLocation;
#[cfg(feature = "gecko")]
use malloc_size_of::{MallocSizeOfOps, MallocUnconditionalShallowSizeOf};
use media_queries::MediaList;
use servo_arc::Arc;
use shared_lock::{DeepCloneParams, DeepCloneWithLock, Locked, SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
use std::fmt;
use style_traits::ToCss;
use stylesheets::CssRules;
/// An [`@media`][media] urle.
///
/// [media]: https://drafts.csswg.org/css-conditional/#at-ruledef-media
#[derive(Debug)]
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<W>(&self, guard: &SharedRwLockReadGuard, dest: &mut W) -> fmt::Result
where W: fmt::Write {
dest.write_str("@media ")?;
self.media_queries.read_with(guard).to_css(dest)?;
dest.write_str(" {")?;
for rule in self.rules.read_with(guard).0.iter() {
dest.write_str(" ")?;
rule.to_css(guard, dest)?;
}
dest.write_str(" }")
}
}
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(),
}
}
}
|
