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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 https://mozilla.org/MPL/2.0/. */
use std::mem;
use cssparser::{Parser as CssParser, ParserInput as CssParserInput, ToCss};
use dom_struct::dom_struct;
use selectors::parser::{ParseRelative, SelectorList};
use servo_arc::Arc;
use style::selector_parser::SelectorParser;
use style::shared_lock::{Locked, ToCssWithGuard};
use style::stylesheets::{CssRuleType, CssRules, Origin, StyleRule};
use crate::dom::bindings::codegen::Bindings::CSSStyleRuleBinding::CSSStyleRuleMethods;
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::reflector::{DomGlobal, reflect_dom_object};
use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
use crate::dom::bindings::str::DOMString;
use crate::dom::cssgroupingrule::CSSGroupingRule;
use crate::dom::cssrule::SpecificCSSRule;
use crate::dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration, CSSStyleOwner};
use crate::dom::cssstylesheet::CSSStyleSheet;
use crate::dom::node::NodeTraits;
use crate::dom::window::Window;
use crate::script_runtime::CanGc;
#[dom_struct]
pub(crate) struct CSSStyleRule {
cssgroupingrule: CSSGroupingRule,
#[ignore_malloc_size_of = "Arc"]
#[no_trace]
stylerule: Arc<Locked<StyleRule>>,
style_decl: MutNullableDom<CSSStyleDeclaration>,
}
impl CSSStyleRule {
fn new_inherited(
parent_stylesheet: &CSSStyleSheet,
stylerule: Arc<Locked<StyleRule>>,
) -> CSSStyleRule {
CSSStyleRule {
cssgroupingrule: CSSGroupingRule::new_inherited(parent_stylesheet),
stylerule,
style_decl: Default::default(),
}
}
#[cfg_attr(crown, allow(crown::unrooted_must_root))]
pub(crate) fn new(
window: &Window,
parent_stylesheet: &CSSStyleSheet,
stylerule: Arc<Locked<StyleRule>>,
can_gc: CanGc,
) -> DomRoot<CSSStyleRule> {
reflect_dom_object(
Box::new(CSSStyleRule::new_inherited(parent_stylesheet, stylerule)),
window,
can_gc,
)
}
pub(crate) fn ensure_rules(&self) -> Arc<Locked<CssRules>> {
let lock = self.cssgroupingrule.shared_lock();
let mut guard = lock.write();
self.stylerule
.write_with(&mut guard)
.rules
.get_or_insert_with(|| CssRules::new(vec![], lock))
.clone()
}
}
impl SpecificCSSRule for CSSStyleRule {
fn ty(&self) -> CssRuleType {
CssRuleType::Style
}
fn get_css(&self) -> DOMString {
let guard = self.cssgroupingrule.shared_lock().read();
self.stylerule
.read_with(&guard)
.to_css_string(&guard)
.into()
}
}
impl CSSStyleRuleMethods<crate::DomTypeHolder> for CSSStyleRule {
// https://drafts.csswg.org/cssom/#dom-cssstylerule-style
fn Style(&self) -> DomRoot<CSSStyleDeclaration> {
self.style_decl.or_init(|| {
let guard = self.cssgroupingrule.shared_lock().read();
CSSStyleDeclaration::new(
self.global().as_window(),
CSSStyleOwner::CSSRule(
Dom::from_ref(self.upcast()),
self.stylerule.read_with(&guard).block.clone(),
),
None,
CSSModificationAccess::ReadWrite,
CanGc::note(),
)
})
}
// https://drafts.csswg.org/cssom/#dom-cssstylerule-selectortext
fn SelectorText(&self) -> DOMString {
let guard = self.cssgroupingrule.shared_lock().read();
let stylerule = self.stylerule.read_with(&guard);
DOMString::from_string(stylerule.selectors.to_css_string())
}
// https://drafts.csswg.org/cssom/#dom-cssstylerule-selectortext
fn SetSelectorText(&self, value: DOMString) {
let contents = &self
.cssgroupingrule
.parent_stylesheet()
.style_stylesheet()
.contents;
// It's not clear from the spec if we should use the stylesheet's namespaces.
// https://github.com/w3c/csswg-drafts/issues/1511
let namespaces = contents.namespaces.read();
let url_data = contents.url_data.read();
let parser = SelectorParser {
stylesheet_origin: Origin::Author,
namespaces: &namespaces,
url_data: &url_data,
for_supports_rule: false,
};
let mut css_parser = CssParserInput::new(&value);
let mut css_parser = CssParser::new(&mut css_parser);
// TODO: Maybe allow setting relative selectors from the OM, if we're in a nested style
// rule?
if let Ok(mut s) = SelectorList::parse(&parser, &mut css_parser, ParseRelative::No) {
// This mirrors what we do in CSSStyleOwner::mutate_associated_block.
let mut guard = self.cssgroupingrule.shared_lock().write();
let stylerule = self.stylerule.write_with(&mut guard);
mem::swap(&mut stylerule.selectors, &mut s);
if let Some(owner) = self.cssgroupingrule.parent_stylesheet().get_owner() {
owner.stylesheet_list_owner().invalidate_stylesheets();
}
}
}
}
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