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102 lines
3.9 KiB
Rust
102 lines
3.9 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;
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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::js::{MutNullableJS, Root};
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use dom::bindings::reflector::{DomObject, reflect_dom_object};
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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 std::sync::Arc;
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use style::media_queries::parse_media_query_list;
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use style::shared_lock::{Locked, ToCssWithGuard};
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use style::stylesheets::MediaRule;
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use style_traits::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: MutNullableJS<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: MutNullableJS::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>>) -> Root<CSSMediaRule> {
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reflect_dom_object(box 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) -> Root<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 = Parser::new(&text);
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let new_medialist = parse_media_query_list(&mut input);
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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) -> Root<MediaList> {
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self.medialist()
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}
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}
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