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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.
110 lines
4.4 KiB
Rust
110 lines
4.4 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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use cssparser::{Parser as CssParser, ParserInput as CssParserInput};
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use cssparser::ToCss;
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use dom::bindings::codegen::Bindings::CSSStyleRuleBinding::{self, CSSStyleRuleMethods};
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use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use dom::bindings::inheritance::Castable;
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use dom::bindings::reflector::{DomObject, reflect_dom_object};
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use dom::bindings::root::{Dom, DomRoot, MutNullableDom};
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use dom::bindings::str::DOMString;
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use dom::cssrule::{CSSRule, SpecificCSSRule};
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use dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration, CSSStyleOwner};
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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 selectors::parser::SelectorList;
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use servo_arc::Arc;
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use std::mem;
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use style::selector_parser::SelectorParser;
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use style::shared_lock::{Locked, ToCssWithGuard};
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use style::stylesheets::{StyleRule, Origin};
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#[dom_struct]
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pub struct CSSStyleRule {
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cssrule: CSSRule,
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#[ignore_heap_size_of = "Arc"]
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stylerule: Arc<Locked<StyleRule>>,
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style_decl: MutNullableDom<CSSStyleDeclaration>,
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}
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impl CSSStyleRule {
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fn new_inherited(parent_stylesheet: &CSSStyleSheet, stylerule: Arc<Locked<StyleRule>>)
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-> CSSStyleRule {
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CSSStyleRule {
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cssrule: CSSRule::new_inherited(parent_stylesheet),
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stylerule: stylerule,
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style_decl: Default::default(),
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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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stylerule: Arc<Locked<StyleRule>>) -> DomRoot<CSSStyleRule> {
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reflect_dom_object(Box::new(CSSStyleRule::new_inherited(parent_stylesheet, stylerule)),
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window,
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CSSStyleRuleBinding::Wrap)
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}
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}
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impl SpecificCSSRule for CSSStyleRule {
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fn ty(&self) -> u16 {
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use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
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CSSRuleConstants::STYLE_RULE
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}
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fn get_css(&self) -> DOMString {
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let guard = self.cssrule.shared_lock().read();
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self.stylerule.read_with(&guard).to_css_string(&guard).into()
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}
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}
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impl CSSStyleRuleMethods for CSSStyleRule {
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// https://drafts.csswg.org/cssom/#dom-cssstylerule-style
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fn Style(&self) -> DomRoot<CSSStyleDeclaration> {
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self.style_decl.or_init(|| {
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let guard = self.cssrule.shared_lock().read();
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CSSStyleDeclaration::new(
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self.global().as_window(),
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CSSStyleOwner::CSSRule(
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Dom::from_ref(self.upcast()),
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self.stylerule.read_with(&guard).block.clone()
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),
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None,
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CSSModificationAccess::ReadWrite
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)
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})
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylerule-selectortext
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fn SelectorText(&self) -> DOMString {
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let guard = self.cssrule.shared_lock().read();
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let stylerule = self.stylerule.read_with(&guard);
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return DOMString::from_string(stylerule.selectors.to_css_string());
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylerule-selectortext
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fn SetSelectorText(&self, value: DOMString) {
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// It's not clear from the spec if we should use the stylesheet's namespaces.
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// https://github.com/w3c/csswg-drafts/issues/1511
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let namespaces = self.cssrule.parent_stylesheet().style_stylesheet().contents.namespaces.read();
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let parser = SelectorParser {
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stylesheet_origin: Origin::Author,
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namespaces: &namespaces,
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url_data: None,
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};
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let mut css_parser = CssParserInput::new(&*value);
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let mut css_parser = CssParser::new(&mut css_parser);
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if let Ok(mut s) = SelectorList::parse(&parser, &mut css_parser) {
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// This mirrors what we do in CSSStyleOwner::mutate_associated_block.
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let mut guard = self.cssrule.shared_lock().write();
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let stylerule = self.stylerule.write_with(&mut guard);
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mem::swap(&mut stylerule.selectors, &mut s);
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// It seems like we will want to avoid having to invalidate all
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// stylesheets eventually!
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self.global().as_window().Document().invalidate_stylesheets();
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}
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}
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}
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