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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.
88 lines
3.6 KiB
Rust
88 lines
3.6 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::CSSSupportsRuleBinding;
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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;
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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::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::parser::ParserContext;
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use style::shared_lock::{Locked, ToCssWithGuard};
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use style::stylesheets::{CssRuleType, SupportsRule};
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use style::stylesheets::supports_rule::SupportsCondition;
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use style_traits::{PARSING_MODE_DEFAULT, ToCss};
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#[dom_struct]
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pub struct CSSSupportsRule {
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cssconditionrule: CSSConditionRule,
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#[ignore_heap_size_of = "Arc"]
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supportsrule: Arc<Locked<SupportsRule>>,
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}
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impl CSSSupportsRule {
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fn new_inherited(parent_stylesheet: &CSSStyleSheet, supportsrule: Arc<Locked<SupportsRule>>)
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-> CSSSupportsRule {
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let guard = parent_stylesheet.shared_lock().read();
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let list = supportsrule.read_with(&guard).rules.clone();
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CSSSupportsRule {
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cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
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supportsrule: supportsrule,
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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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supportsrule: Arc<Locked<SupportsRule>>) -> DomRoot<CSSSupportsRule> {
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reflect_dom_object(Box::new(CSSSupportsRule::new_inherited(parent_stylesheet, supportsrule)),
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window,
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CSSSupportsRuleBinding::Wrap)
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}
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/// https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-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.supportsrule.read_with(&guard);
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rule.condition.to_css_string().into()
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}
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/// https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-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 cond = SupportsCondition::parse(&mut input);
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if let Ok(cond) = cond {
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let global = self.global();
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let win = global.as_window();
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let url = win.Document().url();
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let quirks_mode = win.Document().quirks_mode();
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let context = ParserContext::new_for_cssom(&url, Some(CssRuleType::Supports),
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PARSING_MODE_DEFAULT,
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quirks_mode);
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let enabled = cond.eval(&context);
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let mut guard = self.cssconditionrule.shared_lock().write();
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let rule = self.supportsrule.write_with(&mut guard);
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rule.condition = cond;
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rule.enabled = enabled;
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}
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}
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}
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impl SpecificCSSRule for CSSSupportsRule {
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fn ty(&self) -> u16 {
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use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
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CSSRuleConstants::SUPPORTS_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.supportsrule.read_with(&guard).to_css_string(&guard).into()
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}
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}
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