script/dom/css/
cssmediarule.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use std::cell::RefCell;
6
7use dom_struct::dom_struct;
8use js::context::JSContext;
9use script_bindings::reflector::reflect_dom_object_with_cx;
10use servo_arc::Arc;
11use style::shared_lock::{SharedRwLockReadGuard, ToCssWithGuard};
12use style::stylesheets::{CssRuleType, MediaRule};
13use style_traits::ToCss;
14
15use super::cssconditionrule::CSSConditionRule;
16use super::cssrule::SpecificCSSRule;
17use super::cssstylesheet::CSSStyleSheet;
18use crate::dom::bindings::codegen::Bindings::CSSMediaRuleBinding::CSSMediaRuleMethods;
19use crate::dom::bindings::reflector::DomGlobal;
20use crate::dom::bindings::root::{DomRoot, MutNullableDom};
21use crate::dom::bindings::str::DOMString;
22use crate::dom::medialist::MediaList;
23use crate::dom::window::Window;
24
25#[dom_struct]
26pub(crate) struct CSSMediaRule {
27    css_condition_rule: CSSConditionRule,
28    #[ignore_malloc_size_of = "Stylo"]
29    #[no_trace]
30    media_rule: RefCell<Arc<MediaRule>>,
31    media_list: MutNullableDom<MediaList>,
32}
33
34impl CSSMediaRule {
35    fn new_inherited(parent_stylesheet: &CSSStyleSheet, mediarule: Arc<MediaRule>) -> CSSMediaRule {
36        let list = mediarule.rules.clone();
37        CSSMediaRule {
38            css_condition_rule: CSSConditionRule::new_inherited(parent_stylesheet, list),
39            media_rule: RefCell::new(mediarule),
40            media_list: MutNullableDom::new(None),
41        }
42    }
43
44    pub(crate) fn new(
45        cx: &mut JSContext,
46        window: &Window,
47        parent_stylesheet: &CSSStyleSheet,
48        mediarule: Arc<MediaRule>,
49    ) -> DomRoot<CSSMediaRule> {
50        reflect_dom_object_with_cx(
51            Box::new(CSSMediaRule::new_inherited(parent_stylesheet, mediarule)),
52            window,
53            cx,
54        )
55    }
56
57    fn medialist(&self, cx: &mut JSContext) -> DomRoot<MediaList> {
58        self.media_list.or_init(|| {
59            MediaList::new(
60                cx,
61                self.global().as_window(),
62                self.css_condition_rule.parent_stylesheet(),
63                self.media_rule.borrow().media_queries.clone(),
64            )
65        })
66    }
67
68    /// <https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface>
69    pub(crate) fn get_condition_text(&self) -> DOMString {
70        let guard = self.css_condition_rule.shared_lock().read();
71        self.media_rule
72            .borrow()
73            .media_queries
74            .read_with(&guard)
75            .to_css_string()
76            .into()
77    }
78
79    pub(crate) fn update_rule(&self, mediarule: Arc<MediaRule>, guard: &SharedRwLockReadGuard) {
80        self.css_condition_rule
81            .update_rules(mediarule.rules.clone(), guard);
82        if let Some(medialist) = self.media_list.get() {
83            medialist.update_media_list(mediarule.media_queries.clone());
84        }
85        *self.media_rule.borrow_mut() = mediarule;
86    }
87}
88
89impl SpecificCSSRule for CSSMediaRule {
90    fn ty(&self) -> CssRuleType {
91        CssRuleType::Media
92    }
93
94    fn get_css(&self) -> DOMString {
95        let guard = self.css_condition_rule.shared_lock().read();
96        self.media_rule.borrow().to_css_string(&guard).into()
97    }
98}
99
100impl CSSMediaRuleMethods<crate::DomTypeHolder> for CSSMediaRule {
101    /// <https://drafts.csswg.org/cssom/#dom-cssgroupingrule-media>
102    fn Media(&self, cx: &mut JSContext) -> DomRoot<MediaList> {
103        self.medialist(cx)
104    }
105}
script/dom/css/cssmediarule.rs

script/dom/css/
cssmediarule.rs
