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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::CSSKeyframesRuleBinding;
use dom::bindings::codegen::Bindings::CSSKeyframesRuleBinding::CSSKeyframesRuleMethods;
use dom::bindings::error::{Error, ErrorResult};
use dom::bindings::inheritance::Castable;
use dom::bindings::js::{MutNullableJS, Root};
use dom::bindings::reflector::{DomObject, reflect_dom_object};
use dom::bindings::str::DOMString;
use dom::csskeyframerule::CSSKeyframeRule;
use dom::cssrule::{CSSRule, SpecificCSSRule};
use dom::cssrulelist::{CSSRuleList, RulesSource};
use dom::cssstylesheet::CSSStyleSheet;
use dom::window::Window;
use parking_lot::RwLock;
use servo_atoms::Atom;
use std::sync::Arc;
use style::keyframes::{Keyframe, KeyframeSelector};
use style::parser::ParserContextExtraData;
use style::stylesheets::KeyframesRule;
use style_traits::ToCss;
#[dom_struct]
pub struct CSSKeyframesRule {
cssrule: CSSRule,
#[ignore_heap_size_of = "Arc"]
keyframesrule: Arc<RwLock<KeyframesRule>>,
rulelist: MutNullableJS<CSSRuleList>,
}
impl CSSKeyframesRule {
fn new_inherited(parent_stylesheet: &CSSStyleSheet, keyframesrule: Arc<RwLock<KeyframesRule>>)
-> CSSKeyframesRule {
CSSKeyframesRule {
cssrule: CSSRule::new_inherited(parent_stylesheet),
keyframesrule: keyframesrule,
rulelist: MutNullableJS::new(None),
}
}
#[allow(unrooted_must_root)]
pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
keyframesrule: Arc<RwLock<KeyframesRule>>) -> Root<CSSKeyframesRule> {
reflect_dom_object(box CSSKeyframesRule::new_inherited(parent_stylesheet, keyframesrule),
window,
CSSKeyframesRuleBinding::Wrap)
}
fn rulelist(&self) -> Root<CSSRuleList> {
self.rulelist.or_init(|| {
let parent_stylesheet = &self.upcast::<CSSRule>().parent_stylesheet();
CSSRuleList::new(self.global().as_window(),
parent_stylesheet,
RulesSource::Keyframes(self.keyframesrule.clone()))
})
}
/// Given a keyframe selector, finds the index of the first corresponding rule if any
fn find_rule(&self, selector: &str) -> Option<usize> {
let mut input = Parser::new(selector);
if let Ok(sel) = KeyframeSelector::parse(&mut input) {
// This finds the *last* element matching a selector
// because that's the rule that applies. Thus, rposition
self.keyframesrule.read()
.keyframes.iter().rposition(|frame| {
frame.read().selector == sel
})
} else {
None
}
}
}
impl CSSKeyframesRuleMethods for CSSKeyframesRule {
// https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-cssrules
fn CssRules(&self) -> Root<CSSRuleList> {
self.rulelist()
}
// https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-appendrule
fn AppendRule(&self, rule: DOMString) {
let rule = Keyframe::parse(&rule, self.cssrule.parent_stylesheet().style_stylesheet(),
ParserContextExtraData::default());
if let Ok(rule) = rule {
self.keyframesrule.write().keyframes.push(rule);
self.rulelist().append_lazy_dom_rule();
}
}
// https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-deleterule
fn DeleteRule(&self, selector: DOMString) {
if let Some(idx) = self.find_rule(&selector) {
let _ = self.rulelist().remove_rule(idx as u32);
}
}
// https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-findrule
fn FindRule(&self, selector: DOMString) -> Option<Root<CSSKeyframeRule>> {
self.find_rule(&selector).and_then(|idx| {
self.rulelist().item(idx as u32)
}).and_then(Root::downcast)
}
// https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-name
fn Name(&self) -> DOMString {
DOMString::from(&*self.keyframesrule.read().name)
}
// https://drafts.csswg.org/css-animations/#dom-csskeyframesrule-name
fn SetName(&self, value: DOMString) -> ErrorResult {
// https://github.com/w3c/csswg-drafts/issues/801
// Setting this property to a CSS-wide keyword or `none` will
// throw a Syntax Error.
match_ignore_ascii_case! { value,
"initial" => return Err(Error::Syntax),
"inherit" => return Err(Error::Syntax),
"unset" => return Err(Error::Syntax),
"none" => return Err(Error::Syntax),
_ => ()
}
self.keyframesrule.write().name = Atom::from(value);
Ok(())
}
}
impl SpecificCSSRule for CSSKeyframesRule {
fn ty(&self) -> u16 {
use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
CSSRuleConstants::KEYFRAMES_RULE
}
fn get_css(&self) -> DOMString {
self.keyframesrule.read().to_css_string().into()
}
fn deparent_children(&self) {
self.rulelist.get().map(|list| list.deparent_all());
}
}
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