script/dom/css/
cssgroupingrule.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use dom_struct::dom_struct;
6use js::context::JSContext;
7use servo_arc::Arc;
8use style::shared_lock::{Locked, SharedRwLock, SharedRwLockReadGuard};
9use style::stylesheets::{CssRuleType, CssRuleTypes, CssRules};
10
11use super::cssconditionrule::CSSConditionRule;
12use super::csslayerblockrule::CSSLayerBlockRule;
13use super::cssrule::CSSRule;
14use super::cssrulelist::{CSSRuleList, RulesSource};
15use super::cssstylerule::CSSStyleRule;
16use super::cssstylesheet::CSSStyleSheet;
17use crate::dom::bindings::codegen::Bindings::CSSGroupingRuleBinding::CSSGroupingRuleMethods;
18use crate::dom::bindings::error::{ErrorResult, Fallible};
19use crate::dom::bindings::inheritance::Castable;
20use crate::dom::bindings::reflector::DomGlobal;
21use crate::dom::bindings::root::{DomRoot, MutNullableDom};
22use crate::dom::bindings::str::DOMString;
23use crate::script_runtime::CanGc;
24
25#[dom_struct]
26pub(crate) struct CSSGroupingRule {
27    css_rule: CSSRule,
28    rule_list: MutNullableDom<CSSRuleList>,
29}
30
31impl CSSGroupingRule {
32    pub(crate) fn new_inherited(parent_stylesheet: &CSSStyleSheet) -> CSSGroupingRule {
33        CSSGroupingRule {
34            css_rule: CSSRule::new_inherited(parent_stylesheet),
35            rule_list: MutNullableDom::new(None),
36        }
37    }
38
39    fn rulelist(&self, cx: &mut JSContext) -> DomRoot<CSSRuleList> {
40        let parent_stylesheet = self.upcast::<CSSRule>().parent_stylesheet();
41        self.rule_list.or_init(|| {
42            let rules = if let Some(rule) = self.downcast::<CSSConditionRule>() {
43                rule.clone_rules()
44            } else if let Some(rule) = self.downcast::<CSSLayerBlockRule>() {
45                rule.clone_rules()
46            } else if let Some(rule) = self.downcast::<CSSStyleRule>() {
47                rule.ensure_rules()
48            } else {
49                unreachable!()
50            };
51            CSSRuleList::new(
52                self.global().as_window(),
53                parent_stylesheet,
54                RulesSource::Rules(rules),
55                CanGc::from_cx(cx),
56            )
57        })
58    }
59
60    pub(crate) fn parent_stylesheet(&self) -> &CSSStyleSheet {
61        self.css_rule.parent_stylesheet()
62    }
63
64    pub(crate) fn shared_lock(&self) -> &SharedRwLock {
65        self.css_rule.shared_lock()
66    }
67
68    pub(crate) fn update_rules(
69        &self,
70        rules: &Arc<Locked<CssRules>>,
71        guard: &SharedRwLockReadGuard,
72    ) {
73        if let Some(rulelist) = self.rule_list.get() {
74            rulelist.update_rules(RulesSource::Rules(rules.clone()), guard);
75        }
76    }
77}
78
79impl CSSGroupingRuleMethods<crate::DomTypeHolder> for CSSGroupingRule {
80    /// <https://drafts.csswg.org/cssom/#dom-cssgroupingrule-cssrules>
81    fn CssRules(&self, cx: &mut JSContext) -> DomRoot<CSSRuleList> {
82        // XXXManishearth check origin clean flag
83        self.rulelist(cx)
84    }
85
86    /// <https://drafts.csswg.org/cssom/#dom-cssgroupingrule-insertrule>
87    fn InsertRule(&self, cx: &mut JSContext, rule: DOMString, index: u32) -> Fallible<u32> {
88        // TODO: this should accumulate the rule types of all ancestors.
89        let rule_type = self.css_rule.as_specific().ty();
90        let containing_rule_types = CssRuleTypes::from(rule_type);
91        let parse_relative_rule_type = match rule_type {
92            CssRuleType::Style | CssRuleType::Scope => Some(rule_type),
93            _ => None,
94        };
95        self.rulelist(cx).insert_rule(
96            &rule,
97            index,
98            containing_rule_types,
99            parse_relative_rule_type,
100            CanGc::from_cx(cx),
101        )
102    }
103
104    /// <https://drafts.csswg.org/cssom/#dom-cssgroupingrule-deleterule>
105    fn DeleteRule(&self, cx: &mut JSContext, index: u32) -> ErrorResult {
106        self.rulelist(cx).remove_rule(index)
107    }
108}
script/dom/css/cssgroupingrule.rs

script/dom/css/
cssgroupingrule.rs
