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aa15dc269f
http://www.robohornet.org gives a score of 101.36 on master, and 102.68 with this PR. The latter is slightly better, but probably within noise level. So it looks like this PR does not affect DOM performance. This is expected since `Box::new` is defined as: ```rust impl<T> Box<T> { #[inline(always)] pub fn new(x: T) -> Box<T> { box x } } ``` With inlining, it should compile to the same as box syntax.
114 lines
4.6 KiB
Rust
114 lines
4.6 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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use cssparser::{Parser, ParserInput};
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use dom::bindings::codegen::Bindings::CSSMediaRuleBinding;
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use dom::bindings::codegen::Bindings::CSSMediaRuleBinding::CSSMediaRuleMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use dom::bindings::reflector::{DomObject, reflect_dom_object};
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use dom::bindings::root::{DomRoot, MutNullableDom};
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use dom::bindings::str::DOMString;
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use dom::cssconditionrule::CSSConditionRule;
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use dom::cssrule::SpecificCSSRule;
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use dom::cssstylesheet::CSSStyleSheet;
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use dom::medialist::MediaList;
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use dom::window::Window;
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use dom_struct::dom_struct;
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use servo_arc::Arc;
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use style::media_queries::parse_media_query_list;
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use style::parser::ParserContext;
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use style::shared_lock::{Locked, ToCssWithGuard};
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use style::stylesheets::{CssRuleType, MediaRule};
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use style_traits::{PARSING_MODE_DEFAULT, ToCss};
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#[dom_struct]
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pub struct CSSMediaRule {
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cssconditionrule: CSSConditionRule,
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#[ignore_heap_size_of = "Arc"]
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mediarule: Arc<Locked<MediaRule>>,
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medialist: MutNullableDom<MediaList>,
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}
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impl CSSMediaRule {
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fn new_inherited(parent_stylesheet: &CSSStyleSheet, mediarule: Arc<Locked<MediaRule>>)
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-> CSSMediaRule {
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let guard = parent_stylesheet.shared_lock().read();
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let list = mediarule.read_with(&guard).rules.clone();
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CSSMediaRule {
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cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
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mediarule: mediarule,
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medialist: MutNullableDom::new(None),
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
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mediarule: Arc<Locked<MediaRule>>) -> DomRoot<CSSMediaRule> {
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reflect_dom_object(Box::new(CSSMediaRule::new_inherited(parent_stylesheet, mediarule)),
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window,
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CSSMediaRuleBinding::Wrap)
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}
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fn medialist(&self) -> DomRoot<MediaList> {
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self.medialist.or_init(|| {
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let guard = self.cssconditionrule.shared_lock().read();
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MediaList::new(self.global().as_window(),
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self.cssconditionrule.parent_stylesheet(),
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self.mediarule.read_with(&guard).media_queries.clone())
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})
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}
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/// https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface
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pub fn get_condition_text(&self) -> DOMString {
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let guard = self.cssconditionrule.shared_lock().read();
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let rule = self.mediarule.read_with(&guard);
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let list = rule.media_queries.read_with(&guard);
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list.to_css_string().into()
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}
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/// https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface
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pub fn set_condition_text(&self, text: DOMString) {
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let mut input = ParserInput::new(&text);
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let mut input = Parser::new(&mut input);
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let global = self.global();
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let window = global.as_window();
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let url = window.get_url();
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let quirks_mode = window.Document().quirks_mode();
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let context = ParserContext::new_for_cssom(&url, Some(CssRuleType::Media),
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PARSING_MODE_DEFAULT,
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quirks_mode);
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let new_medialist = parse_media_query_list(&context, &mut input,
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window.css_error_reporter());
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let mut guard = self.cssconditionrule.shared_lock().write();
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// Clone an Arc because we can’t borrow `guard` twice at the same time.
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// FIXME(SimonSapin): allow access to multiple objects with one write guard?
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// Would need a set of usize pointer addresses or something,
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// the same object is not accessed more than once.
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let mqs = Arc::clone(&self.mediarule.write_with(&mut guard).media_queries);
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*mqs.write_with(&mut guard) = new_medialist;
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}
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}
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impl SpecificCSSRule for CSSMediaRule {
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fn ty(&self) -> u16 {
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use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
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CSSRuleConstants::MEDIA_RULE
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}
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fn get_css(&self) -> DOMString {
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let guard = self.cssconditionrule.shared_lock().read();
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self.mediarule.read_with(&guard).to_css_string(&guard).into()
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}
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}
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impl CSSMediaRuleMethods for CSSMediaRule {
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// https://drafts.csswg.org/cssom/#dom-cssgroupingrule-media
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fn Media(&self) -> DomRoot<MediaList> {
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self.medialist()
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}
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}
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