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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use cssparser::{Parser, ParserInput};
use dom::bindings::codegen::Bindings::CSSMediaRuleBinding;
use dom::bindings::codegen::Bindings::CSSMediaRuleBinding::CSSMediaRuleMethods;
use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
use dom::bindings::reflector::{DomObject, reflect_dom_object};
use dom::bindings::root::{DomRoot, MutNullableDom};
use dom::bindings::str::DOMString;
use dom::cssconditionrule::CSSConditionRule;
use dom::cssrule::SpecificCSSRule;
use dom::cssstylesheet::CSSStyleSheet;
use dom::medialist::MediaList;
use dom::window::Window;
use dom_struct::dom_struct;
use servo_arc::Arc;
use style::media_queries::parse_media_query_list;
use style::parser::ParserContext;
use style::shared_lock::{Locked, ToCssWithGuard};
use style::stylesheets::{CssRuleType, MediaRule};
use style_traits::{PARSING_MODE_DEFAULT, ToCss};
#[dom_struct]
pub struct CSSMediaRule {
cssconditionrule: CSSConditionRule,
#[ignore_heap_size_of = "Arc"]
mediarule: Arc<Locked<MediaRule>>,
medialist: MutNullableDom<MediaList>,
}
impl CSSMediaRule {
fn new_inherited(parent_stylesheet: &CSSStyleSheet, mediarule: Arc<Locked<MediaRule>>)
-> CSSMediaRule {
let guard = parent_stylesheet.shared_lock().read();
let list = mediarule.read_with(&guard).rules.clone();
CSSMediaRule {
cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
mediarule: mediarule,
medialist: MutNullableDom::new(None),
}
}
#[allow(unrooted_must_root)]
pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
mediarule: Arc<Locked<MediaRule>>) -> DomRoot<CSSMediaRule> {
reflect_dom_object(Box::new(CSSMediaRule::new_inherited(parent_stylesheet, mediarule)),
window,
CSSMediaRuleBinding::Wrap)
}
fn medialist(&self) -> DomRoot<MediaList> {
self.medialist.or_init(|| {
let guard = self.cssconditionrule.shared_lock().read();
MediaList::new(self.global().as_window(),
self.cssconditionrule.parent_stylesheet(),
self.mediarule.read_with(&guard).media_queries.clone())
})
}
/// https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface
pub fn get_condition_text(&self) -> DOMString {
let guard = self.cssconditionrule.shared_lock().read();
let rule = self.mediarule.read_with(&guard);
let list = rule.media_queries.read_with(&guard);
list.to_css_string().into()
}
/// https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface
pub fn set_condition_text(&self, text: DOMString) {
let mut input = ParserInput::new(&text);
let mut input = Parser::new(&mut input);
let global = self.global();
let window = global.as_window();
let url = window.get_url();
let quirks_mode = window.Document().quirks_mode();
let context = ParserContext::new_for_cssom(&url, Some(CssRuleType::Media),
PARSING_MODE_DEFAULT,
quirks_mode);
let new_medialist = parse_media_query_list(&context, &mut input,
window.css_error_reporter());
let mut guard = self.cssconditionrule.shared_lock().write();
// Clone an Arc because we can’t borrow `guard` twice at the same time.
// FIXME(SimonSapin): allow access to multiple objects with one write guard?
// Would need a set of usize pointer addresses or something,
// the same object is not accessed more than once.
let mqs = Arc::clone(&self.mediarule.write_with(&mut guard).media_queries);
*mqs.write_with(&mut guard) = new_medialist;
}
}
impl SpecificCSSRule for CSSMediaRule {
fn ty(&self) -> u16 {
use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
CSSRuleConstants::MEDIA_RULE
}
fn get_css(&self) -> DOMString {
let guard = self.cssconditionrule.shared_lock().read();
self.mediarule.read_with(&guard).to_css_string(&guard).into()
}
}
impl CSSMediaRuleMethods for CSSMediaRule {
// https://drafts.csswg.org/cssom/#dom-cssgroupingrule-media
fn Media(&self) -> DomRoot<MediaList> {
self.medialist()
}
}
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