script/dom/
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 servo_arc::Arc;
7use style::shared_lock::{Locked, SharedRwLock, SharedRwLockReadGuard};
8use style::stylesheets::{CssRuleType, CssRuleTypes, CssRules};
9
10use crate::dom::bindings::codegen::Bindings::CSSGroupingRuleBinding::CSSGroupingRuleMethods;
11use crate::dom::bindings::error::{ErrorResult, Fallible};
12use crate::dom::bindings::inheritance::Castable;
13use crate::dom::bindings::reflector::DomGlobal;
14use crate::dom::bindings::root::{DomRoot, MutNullableDom};
15use crate::dom::bindings::str::DOMString;
16use crate::dom::cssconditionrule::CSSConditionRule;
17use crate::dom::csslayerblockrule::CSSLayerBlockRule;
18use crate::dom::cssrule::CSSRule;
19use crate::dom::cssrulelist::{CSSRuleList, RulesSource};
20use crate::dom::cssstylerule::CSSStyleRule;
21use crate::dom::cssstylesheet::CSSStyleSheet;
22use crate::script_runtime::CanGc;
23
24#[dom_struct]
25pub(crate) struct CSSGroupingRule {
26    cssrule: CSSRule,
27    rulelist: MutNullableDom<CSSRuleList>,
28}
29
30impl CSSGroupingRule {
31    pub(crate) fn new_inherited(parent_stylesheet: &CSSStyleSheet) -> CSSGroupingRule {
32        CSSGroupingRule {
33            cssrule: CSSRule::new_inherited(parent_stylesheet),
34            rulelist: MutNullableDom::new(None),
35        }
36    }
37
38    fn rulelist(&self, can_gc: CanGc) -> DomRoot<CSSRuleList> {
39        let parent_stylesheet = self.upcast::<CSSRule>().parent_stylesheet();
40        self.rulelist.or_init(|| {
41            let rules = if let Some(rule) = self.downcast::<CSSConditionRule>() {
42                rule.clone_rules()
43            } else if let Some(rule) = self.downcast::<CSSLayerBlockRule>() {
44                rule.clone_rules()
45            } else if let Some(rule) = self.downcast::<CSSStyleRule>() {
46                rule.ensure_rules()
47            } else {
48                unreachable!()
49            };
50            CSSRuleList::new(
51                self.global().as_window(),
52                parent_stylesheet,
53                RulesSource::Rules(rules),
54                can_gc,
55            )
56        })
57    }
58
59    pub(crate) fn parent_stylesheet(&self) -> &CSSStyleSheet {
60        self.cssrule.parent_stylesheet()
61    }
62
63    pub(crate) fn shared_lock(&self) -> &SharedRwLock {
64        self.cssrule.shared_lock()
65    }
66
67    pub(crate) fn update_rules(
68        &self,
69        rules: &Arc<Locked<CssRules>>,
70        guard: &SharedRwLockReadGuard,
71    ) {
72        if let Some(rulelist) = self.rulelist.get() {
73            rulelist.update_rules(RulesSource::Rules(rules.clone()), guard);
74        }
75    }
76}
77
78impl CSSGroupingRuleMethods<crate::DomTypeHolder> for CSSGroupingRule {
79    // https://drafts.csswg.org/cssom/#dom-cssgroupingrule-cssrules
80    fn CssRules(&self, can_gc: CanGc) -> DomRoot<CSSRuleList> {
81        // XXXManishearth check origin clean flag
82        self.rulelist(can_gc)
83    }
84
85    // https://drafts.csswg.org/cssom/#dom-cssgroupingrule-insertrule
86    fn InsertRule(&self, rule: DOMString, index: u32, can_gc: CanGc) -> Fallible<u32> {
87        // TODO: this should accumulate the rule types of all ancestors.
88        let rule_type = self.cssrule.as_specific().ty();
89        let containing_rule_types = CssRuleTypes::from(rule_type);
90        let parse_relative_rule_type = match rule_type {
91            CssRuleType::Style | CssRuleType::Scope => Some(rule_type),
92            _ => None,
93        };
94        self.rulelist(can_gc).insert_rule(
95            &rule,
96            index,
97            containing_rule_types,
98            parse_relative_rule_type,
99            can_gc,
100        )
101    }
102
103    // https://drafts.csswg.org/cssom/#dom-cssgroupingrule-deleterule
104    fn DeleteRule(&self, index: u32, can_gc: CanGc) -> ErrorResult {
105        self.rulelist(can_gc).remove_rule(index)
106    }
107}
script/dom/cssgroupingrule.rs

script/dom/
cssgroupingrule.rs
