mirror of
https://github.com/servo/servo.git
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b07ebbae6b
The alias is left there temporarilly and will be removed completely in a later commit where
also components/style/gecko/generated/structs_{debug|release}.rs are re-generated (they still
use the old alias).
77 lines
2.4 KiB
Rust
77 lines
2.4 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 http://mozilla.org/MPL/2.0/. */
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//! A style rule.
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use cssparser::SourceLocation;
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use properties::PropertyDeclarationBlock;
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use selector_parser::SelectorImpl;
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use selectors::SelectorList;
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use servo_arc::Arc;
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use shared_lock::{DeepCloneParams, DeepCloneWithLock, Locked, SharedRwLock, SharedRwLockReadGuard, ToCssWithGuard};
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use std::fmt;
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use style_traits::ToCss;
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use stylesheets::{MallocSizeOf, MallocSizeOfFn, MallocSizeOfWithGuard};
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/// A style rule, with selectors and declarations.
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#[derive(Debug)]
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pub struct StyleRule {
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/// The list of selectors in this rule.
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pub selectors: SelectorList<SelectorImpl>,
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/// The declaration block with the properties it contains.
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pub block: Arc<Locked<PropertyDeclarationBlock>>,
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/// The location in the sheet where it was found.
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pub source_location: SourceLocation,
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}
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impl DeepCloneWithLock for StyleRule {
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/// Deep clones this StyleRule.
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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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_params: &DeepCloneParams,
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) -> StyleRule {
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StyleRule {
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selectors: self.selectors.clone(),
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block: Arc::new(lock.wrap(self.block.read_with(guard).clone())),
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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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impl MallocSizeOfWithGuard for StyleRule {
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fn malloc_size_of_children(
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&self,
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guard: &SharedRwLockReadGuard,
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malloc_size_of: MallocSizeOfFn
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) -> usize {
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// Measurement of other fields may be added later.
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self.block.read_with(guard).malloc_size_of_children(malloc_size_of)
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}
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}
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impl ToCssWithGuard for StyleRule {
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/// https://drafts.csswg.org/cssom/#serialize-a-css-rule CSSStyleRule
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fn to_css<W>(&self, guard: &SharedRwLockReadGuard, dest: &mut W) -> fmt::Result
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where W: fmt::Write,
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{
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use cssparser::ToCss;
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// Step 1
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self.selectors.to_css(dest)?;
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// Step 2
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dest.write_str(" { ")?;
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// Step 3
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let declaration_block = self.block.read_with(guard);
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declaration_block.to_css(dest)?;
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// Step 4
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if !declaration_block.declarations().is_empty() {
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dest.write_str(" ")?;
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}
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// Step 5
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dest.write_str("}")
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}
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}
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