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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;
use dom::bindings::codegen::Bindings::CSSSupportsRuleBinding;
use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
use dom::bindings::js::Root;
use dom::bindings::reflector::{DomObject, reflect_dom_object};
use dom::bindings::str::DOMString;
use dom::cssconditionrule::CSSConditionRule;
use dom::cssrule::SpecificCSSRule;
use dom::cssstylesheet::CSSStyleSheet;
use dom::window::Window;
use dom_struct::dom_struct;
use parking_lot::RwLock;
use std::sync::Arc;
use style::parser::ParserContext;
use style::stylesheets::SupportsRule;
use style::supports::SupportsCondition;
use style_traits::ToCss;
#[dom_struct]
pub struct CSSSupportsRule {
cssrule: CSSConditionRule,
#[ignore_heap_size_of = "Arc"]
supportsrule: Arc<RwLock<SupportsRule>>,
}
impl CSSSupportsRule {
fn new_inherited(parent_stylesheet: &CSSStyleSheet, supportsrule: Arc<RwLock<SupportsRule>>)
-> CSSSupportsRule {
let list = supportsrule.read().rules.clone();
CSSSupportsRule {
cssrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
supportsrule: supportsrule,
}
}
#[allow(unrooted_must_root)]
pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
supportsrule: Arc<RwLock<SupportsRule>>) -> Root<CSSSupportsRule> {
reflect_dom_object(box CSSSupportsRule::new_inherited(parent_stylesheet, supportsrule),
window,
CSSSupportsRuleBinding::Wrap)
}
/// https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface
pub fn get_condition_text(&self) -> DOMString {
let rule = self.supportsrule.read();
rule.condition.to_css_string().into()
}
/// https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface
pub fn set_condition_text(&self, text: DOMString) {
let mut input = Parser::new(&text);
let cond = SupportsCondition::parse(&mut input);
if let Ok(cond) = cond {
let url = self.global().as_window().Document().url();
let context = ParserContext::new_for_cssom(&url);
let enabled = cond.eval(&context);
let mut rule = self.supportsrule.write();
rule.condition = cond;
rule.enabled = enabled;
}
}
}
impl SpecificCSSRule for CSSSupportsRule {
fn ty(&self) -> u16 {
use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
CSSRuleConstants::SUPPORTS_RULE
}
fn get_css(&self) -> DOMString {
self.supportsrule.read().to_css_string().into()
}
}
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