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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 dom::bindings::codegen::Bindings::CSSRuleListBinding;
use dom::bindings::codegen::Bindings::CSSRuleListBinding::CSSRuleListMethods;
use dom::bindings::js::{JS, MutNullableHeap, Root};
use dom::bindings::reflector::{Reflectable, Reflector, reflect_dom_object};
use dom::cssrule::CSSRule;
use dom::cssstylesheet::CSSStyleSheet;
use dom::window::Window;
use style::stylesheets::CssRules;
no_jsmanaged_fields!(CssRules);
#[dom_struct]
pub struct CSSRuleList {
reflector_: Reflector,
sheet: JS<CSSStyleSheet>,
#[ignore_heap_size_of = "Arc"]
rules: CssRules,
dom_rules: Vec<MutNullableHeap<JS<CSSRule>>>
}
impl CSSRuleList {
#[allow(unrooted_must_root)]
pub fn new_inherited(sheet: &CSSStyleSheet, rules: CssRules) -> CSSRuleList {
let dom_rules = rules.0.read().iter().map(|_| MutNullableHeap::new(None)).collect();
CSSRuleList {
reflector_: Reflector::new(),
sheet: JS::from_ref(sheet),
rules: rules,
dom_rules: dom_rules,
}
}
#[allow(unrooted_must_root)]
pub fn new(window: &Window, sheet: &CSSStyleSheet, rules: CssRules) -> Root<CSSRuleList> {
reflect_dom_object(box CSSRuleList::new_inherited(sheet, rules),
window,
CSSRuleListBinding::Wrap)
}
}
impl CSSRuleListMethods for CSSRuleList {
// https://drafts.csswg.org/cssom/#ref-for-dom-cssrulelist-item-1
fn Item(&self, idx: u32) -> Option<Root<CSSRule>> {
self.dom_rules.get(idx as usize).map(|rule| {
rule.or_init(|| {
CSSRule::new_specific(self.global().as_window(),
&self.sheet,
self.rules.0.read()[idx as usize].clone())
})
})
}
// https://drafts.csswg.org/cssom/#dom-cssrulelist-length
fn Length(&self) -> u32 {
self.dom_rules.len() as u32
}
// check-tidy: no specs after this line
fn IndexedGetter(&self, index: u32) -> Option<Root<CSSRule>> {
self.Item(index)
}
}
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