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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::CSSSupportsRuleBinding;
use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
use dom::bindings::reflector::{DomObject, reflect_dom_object};
use dom::bindings::root::DomRoot;
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 servo_arc::Arc;
use style::parser::ParserContext;
use style::shared_lock::{Locked, ToCssWithGuard};
use style::stylesheets::{CssRuleType, SupportsRule};
use style::stylesheets::supports_rule::SupportsCondition;
use style_traits::{ParsingMode, ToCss};
#[dom_struct]
pub struct CSSSupportsRule {
cssconditionrule: CSSConditionRule,
#[ignore_malloc_size_of = "Arc"]
supportsrule: Arc<Locked<SupportsRule>>,
}
impl CSSSupportsRule {
fn new_inherited(parent_stylesheet: &CSSStyleSheet, supportsrule: Arc<Locked<SupportsRule>>)
-> CSSSupportsRule {
let guard = parent_stylesheet.shared_lock().read();
let list = supportsrule.read_with(&guard).rules.clone();
CSSSupportsRule {
cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
supportsrule: supportsrule,
}
}
#[allow(unrooted_must_root)]
pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
supportsrule: Arc<Locked<SupportsRule>>) -> DomRoot<CSSSupportsRule> {
reflect_dom_object(Box::new(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 guard = self.cssconditionrule.shared_lock().read();
let rule = self.supportsrule.read_with(&guard);
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 = ParserInput::new(&text);
let mut input = Parser::new(&mut input);
let cond = SupportsCondition::parse(&mut input);
if let Ok(cond) = cond {
let global = self.global();
let win = global.as_window();
let url = win.Document().url();
let quirks_mode = win.Document().quirks_mode();
let context = ParserContext::new_for_cssom(&url, Some(CssRuleType::Supports),
ParsingMode::DEFAULT,
quirks_mode);
let enabled = cond.eval(&context);
let mut guard = self.cssconditionrule.shared_lock().write();
let rule = self.supportsrule.write_with(&mut guard);
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 {
let guard = self.cssconditionrule.shared_lock().read();
self.supportsrule.read_with(&guard).to_css_string(&guard).into()
}
}
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