script/dom/
medialist.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 cssparser::{Parser, ParserInput};
8use dom_struct::dom_struct;
9use servo_arc::Arc;
10use style::media_queries::{MediaList as StyleMediaList, MediaQuery};
11use style::parser::ParserContext;
12use style::shared_lock::{Locked, SharedRwLock};
13use style::stylesheets::{CssRuleType, Origin, UrlExtraData};
14use style_traits::{ParseError, ParsingMode, ToCss};
15
16use crate::dom::bindings::codegen::Bindings::MediaListBinding::MediaListMethods;
17use crate::dom::bindings::codegen::Bindings::WindowBinding::Window_Binding::WindowMethods;
18use crate::dom::bindings::reflector::{DomGlobal, Reflector, reflect_dom_object};
19use crate::dom::bindings::root::{Dom, DomRoot};
20use crate::dom::bindings::str::DOMString;
21use crate::dom::cssstylesheet::CSSStyleSheet;
22use crate::dom::window::Window;
23use crate::script_runtime::CanGc;
24
25#[dom_struct]
26pub(crate) struct MediaList {
27    reflector_: Reflector,
28    parent_stylesheet: Dom<CSSStyleSheet>,
29    #[ignore_malloc_size_of = "Arc"]
30    #[no_trace]
31    media_queries: RefCell<Arc<Locked<StyleMediaList>>>,
32}
33
34impl MediaList {
35    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
36    pub(crate) fn new_inherited(
37        parent_stylesheet: &CSSStyleSheet,
38        media_queries: Arc<Locked<StyleMediaList>>,
39    ) -> MediaList {
40        MediaList {
41            parent_stylesheet: Dom::from_ref(parent_stylesheet),
42            reflector_: Reflector::new(),
43            media_queries: RefCell::new(media_queries),
44        }
45    }
46
47    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
48    pub(crate) fn new(
49        window: &Window,
50        parent_stylesheet: &CSSStyleSheet,
51        media_queries: Arc<Locked<StyleMediaList>>,
52        can_gc: CanGc,
53    ) -> DomRoot<MediaList> {
54        reflect_dom_object(
55            Box::new(MediaList::new_inherited(parent_stylesheet, media_queries)),
56            window,
57            can_gc,
58        )
59    }
60
61    fn shared_lock(&self) -> &SharedRwLock {
62        self.parent_stylesheet.shared_lock()
63    }
64
65    /// <https://drafts.csswg.org/cssom/#parse-a-media-query-list>
66    pub(crate) fn parse_media_list(value: &str, window: &Window) -> StyleMediaList {
67        if value.is_empty() {
68            return StyleMediaList::empty();
69        }
70        let mut input = ParserInput::new(value);
71        let mut parser = Parser::new(&mut input);
72        let url_data = UrlExtraData(window.get_url().get_arc());
73        let quirks_mode = window.Document().quirks_mode();
74        // FIXME(emilio): This looks somewhat fishy, since we use the context
75        // only to parse the media query list, CssRuleType::Media doesn't make
76        // much sense.
77        let context = ParserContext::new(
78            Origin::Author,
79            &url_data,
80            Some(CssRuleType::Media),
81            ParsingMode::DEFAULT,
82            quirks_mode,
83            /* namespaces = */ Default::default(),
84            window.css_error_reporter(),
85            None,
86        );
87        StyleMediaList::parse(&context, &mut parser)
88    }
89
90    /// <https://drafts.csswg.org/cssom/#parse-a-media-query>
91    pub(crate) fn parse_media_query<'i>(
92        value: &'i str,
93        window: &Window,
94    ) -> Result<MediaQuery, ParseError<'i>> {
95        let mut input = ParserInput::new(value);
96        let mut parser = Parser::new(&mut input);
97        let url_data = UrlExtraData(window.get_url().get_arc());
98        let quirks_mode = window.Document().quirks_mode();
99        let context = ParserContext::new(
100            Origin::Author,
101            &url_data,
102            Some(CssRuleType::Media),
103            ParsingMode::DEFAULT,
104            quirks_mode,
105            /* namespaces = */ Default::default(),
106            window.css_error_reporter(),
107            None,
108        );
109        MediaQuery::parse(&context, &mut parser)
110    }
111
112    pub(crate) fn clone_media_list(&self) -> StyleMediaList {
113        let guard = self.shared_lock().read();
114        self.media_queries.borrow().read_with(&guard).clone()
115    }
116
117    pub(crate) fn update_media_list(&self, media_queries: Arc<Locked<StyleMediaList>>) {
118        *self.media_queries.borrow_mut() = media_queries;
119    }
120}
121
122impl MediaListMethods<crate::DomTypeHolder> for MediaList {
123    /// <https://drafts.csswg.org/cssom/#dom-medialist-mediatext>
124    fn MediaText(&self) -> DOMString {
125        let guard = self.shared_lock().read();
126        DOMString::from(
127            self.media_queries
128                .borrow()
129                .read_with(&guard)
130                .to_css_string(),
131        )
132    }
133
134    /// <https://drafts.csswg.org/cssom/#dom-medialist-mediatext>
135    fn SetMediaText(&self, value: DOMString) {
136        self.parent_stylesheet.will_modify();
137        let global = self.global();
138        let mut guard = self.shared_lock().write();
139        let media_queries_borrowed = self.media_queries.borrow();
140        let media_queries = media_queries_borrowed.write_with(&mut guard);
141        *media_queries = Self::parse_media_list(&value, global.as_window());
142        self.parent_stylesheet.notify_invalidations();
143    }
144
145    // https://drafts.csswg.org/cssom/#dom-medialist-length
146    fn Length(&self) -> u32 {
147        let guard = self.shared_lock().read();
148        self.media_queries
149            .borrow()
150            .read_with(&guard)
151            .media_queries
152            .len() as u32
153    }
154
155    /// <https://drafts.csswg.org/cssom/#dom-medialist-item>
156    fn Item(&self, index: u32) -> Option<DOMString> {
157        let guard = self.shared_lock().read();
158        self.media_queries
159            .borrow()
160            .read_with(&guard)
161            .media_queries
162            .get(index as usize)
163            .map(|query| query.to_css_string().into())
164    }
165
166    /// <https://drafts.csswg.org/cssom/#dom-medialist-item>
167    fn IndexedGetter(&self, index: u32) -> Option<DOMString> {
168        self.Item(index)
169    }
170
171    /// <https://drafts.csswg.org/cssom/#dom-medialist-appendmedium>
172    fn AppendMedium(&self, medium: DOMString) {
173        // Step 1
174        let global = self.global();
175        let m = Self::parse_media_query(&medium, global.as_window());
176        // Step 2
177        if m.is_err() {
178            return;
179        }
180        // Step 3
181        {
182            let m_serialized = m.clone().unwrap().to_css_string();
183            let guard = self.shared_lock().read();
184            let any = self
185                .media_queries
186                .borrow()
187                .read_with(&guard)
188                .media_queries
189                .iter()
190                .any(|q| m_serialized == q.to_css_string());
191            if any {
192                return;
193            }
194        }
195        // Step 4
196        self.parent_stylesheet.will_modify();
197        let mut guard = self.shared_lock().write();
198        self.media_queries
199            .borrow()
200            .write_with(&mut guard)
201            .media_queries
202            .push(m.unwrap());
203        self.parent_stylesheet.notify_invalidations();
204    }
205
206    /// <https://drafts.csswg.org/cssom/#dom-medialist-deletemedium>
207    fn DeleteMedium(&self, medium: DOMString) {
208        // Step 1
209        let global = self.global();
210        let m = Self::parse_media_query(&medium, global.as_window());
211        // Step 2
212        if m.is_err() {
213            return;
214        }
215        // Step 3
216        self.parent_stylesheet.will_modify();
217        let m_serialized = m.unwrap().to_css_string();
218        let mut guard = self.shared_lock().write();
219        let media_queries_borrowed = self.media_queries.borrow();
220        let media_list = media_queries_borrowed.write_with(&mut guard);
221        let new_vec = media_list
222            .media_queries
223            .drain(..)
224            .filter(|q| m_serialized != q.to_css_string())
225            .collect();
226        media_list.media_queries = new_vec;
227        self.parent_stylesheet.notify_invalidations();
228    }
229}
script/dom/medialist.rs

script/dom/
medialist.rs
