script/dom/css/
css.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 cssparser::{Parser, serialize_identifier};
6use dom_struct::dom_struct;
7use js::context::JSContext;
8use script_bindings::codegen::GenericBindings::CSSBinding::PropertyDefinition;
9use script_bindings::reflector::Reflector;
10use style::stylesheets::supports_rule::{Declaration, parse_condition_or_declaration};
11use style::stylesheets::{CssRuleType, UrlExtraData};
12use style::stylist::RegisterCustomPropertyResult;
13use style_traits::ParsingMode;
14
15use crate::css::css::parser_context_for_anonymous_content;
16use crate::dom::bindings::codegen::Bindings::CSSBinding::CSSMethods;
17use crate::dom::bindings::codegen::Bindings::WindowBinding::Window_Binding::WindowMethods;
18use crate::dom::bindings::error::{Error, Fallible};
19use crate::dom::bindings::root::DomRoot;
20use crate::dom::bindings::str::DOMString;
21use crate::dom::window::Window;
22use crate::dom::worklet::Worklet;
23
24#[dom_struct]
25#[expect(clippy::upper_case_acronyms)]
26pub(crate) struct CSS {
27    reflector_: Reflector,
28}
29
30impl CSSMethods<crate::DomTypeHolder> for CSS {
31    /// <https://drafts.csswg.org/cssom/#the-css.escape()-method>
32    fn Escape(_: &Window, ident: DOMString) -> Fallible<DOMString> {
33        let mut escaped = String::new();
34        serialize_identifier(&ident.str(), &mut escaped).unwrap();
35        Ok(DOMString::from(escaped))
36    }
37
38    /// <https://drafts.csswg.org/css-conditional/#dom-css-supports>
39    fn Supports(win: &Window, property: DOMString, value: DOMString) -> bool {
40        let mut decl = String::new();
41        serialize_identifier(&property.str(), &mut decl).unwrap();
42        decl.push_str(": ");
43        decl.push_str(&value.str());
44        let decl = Declaration(decl);
45        let url_data = UrlExtraData(win.Document().url().get_arc());
46        let context = parser_context_for_anonymous_content(
47            CssRuleType::Style,
48            ParsingMode::DEFAULT,
49            &url_data,
50        );
51        decl.eval(&context)
52    }
53
54    /// <https://drafts.csswg.org/css-conditional/#dom-css-supports>
55    fn Supports_(win: &Window, condition: DOMString) -> bool {
56        let condition = condition.str();
57        let mut input = Parser::new(&condition);
58        let cond = match parse_condition_or_declaration(&mut input) {
59            Ok(c) => c,
60            Err(..) => return false,
61        };
62
63        let url_data = UrlExtraData(win.Document().url().get_arc());
64        let context = parser_context_for_anonymous_content(
65            CssRuleType::Style,
66            ParsingMode::DEFAULT,
67            &url_data,
68        );
69        cond.eval(&context)
70    }
71
72    /// <https://drafts.css-houdini.org/css-paint-api-1/#paint-worklet>
73    fn PaintWorklet(cx: &mut JSContext, win: &Window) -> DomRoot<Worklet> {
74        win.paint_worklet(cx)
75    }
76
77    /// <https://drafts.css-houdini.org/css-properties-values-api/#the-registerproperty-function>
78    fn RegisterProperty(window: &Window, property_definition: &PropertyDefinition) -> Fallible<()> {
79        use RegisterCustomPropertyResult::*;
80        let result = window.layout_mut().stylist_mut().register_custom_property(
81            &UrlExtraData(window.get_url().get_arc()),
82            &property_definition.name.str(),
83            &property_definition.syntax.str(),
84            property_definition.inherits,
85            property_definition
86                .initialValue
87                .as_ref()
88                .map(|value| value.str())
89                .as_deref(),
90        );
91        Err(match result {
92            SuccessfullyRegistered => return Ok(()),
93            InvalidName |
94            InvalidSyntax |
95            InvalidInitialValue |
96            NoInitialValue |
97            InitialValueNotComputationallyIndependent => Error::Syntax(Some(
98                "CSS property value is not computationally independent".into(),
99            )),
100            AlreadyRegistered => {
101                Error::InvalidModification(Some("CSS property is already registered".into()))
102            },
103        })
104    }
105}
script/dom/css/css.rs

script/dom/css/
css.rs
