1use cssparser::{Parser, ParserInput, serialize_identifier};
6use dom_struct::dom_struct;
7use layout_api::{PropertyRegistration, RegisterPropertyError};
8use script_bindings::codegen::GenericBindings::CSSBinding::PropertyDefinition;
9use style::context::QuirksMode;
10use style::parser::ParserContext;
11use style::stylesheets::supports_rule::{Declaration, parse_condition_or_declaration};
12use style::stylesheets::{CssRuleType, Origin, UrlExtraData};
13use style_traits::ParsingMode;
14
15use crate::dom::bindings::codegen::Bindings::CSSBinding::CSSMethods;
16use crate::dom::bindings::codegen::Bindings::WindowBinding::Window_Binding::WindowMethods;
17use crate::dom::bindings::error::{Error, Fallible};
18use crate::dom::bindings::reflector::Reflector;
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#[allow(clippy::upper_case_acronyms)]
26pub(crate) struct CSS {
27 reflector_: Reflector,
28}
29
30impl CSSMethods<crate::DomTypeHolder> for CSS {
31 fn Escape(_: &Window, ident: DOMString) -> Fallible<DOMString> {
33 let mut escaped = String::new();
34 serialize_identifier(&ident, &mut escaped).unwrap();
35 Ok(DOMString::from(escaped))
36 }
37
38 fn Supports(win: &Window, property: DOMString, value: DOMString) -> bool {
40 let mut decl = String::new();
41 serialize_identifier(&property, &mut decl).unwrap();
42 decl.push_str(": ");
43 decl.push_str(&value);
44 let decl = Declaration(decl);
45 let url_data = UrlExtraData(win.Document().url().get_arc());
46 let context = ParserContext::new(
47 Origin::Author,
48 &url_data,
49 Some(CssRuleType::Style),
50 ParsingMode::DEFAULT,
51 QuirksMode::NoQuirks,
52 Default::default(),
53 None,
54 None,
55 );
56 decl.eval(&context)
57 }
58
59 fn Supports_(win: &Window, condition: DOMString) -> bool {
61 let mut input = ParserInput::new(&condition);
62 let mut input = Parser::new(&mut input);
63 let cond = match parse_condition_or_declaration(&mut input) {
64 Ok(c) => c,
65 Err(..) => return false,
66 };
67
68 let url_data = UrlExtraData(win.Document().url().get_arc());
69 let context = ParserContext::new(
70 Origin::Author,
71 &url_data,
72 Some(CssRuleType::Style),
73 ParsingMode::DEFAULT,
74 QuirksMode::NoQuirks,
75 Default::default(),
76 None,
77 None,
78 );
79 cond.eval(&context)
80 }
81
82 fn PaintWorklet(win: &Window) -> DomRoot<Worklet> {
84 win.paint_worklet()
85 }
86
87 fn RegisterProperty(window: &Window, property_definition: &PropertyDefinition) -> Fallible<()> {
89 let property_registration = PropertyRegistration {
90 name: property_definition.name.str().to_owned(),
91 inherits: property_definition.inherits,
92 url_data: UrlExtraData(window.get_url().get_arc()),
93 initial_value: property_definition
94 .initialValue
95 .as_ref()
96 .map(|value| value.str().to_owned()),
97 syntax: property_definition.syntax.str().to_owned(),
98 };
99
100 window
101 .layout_mut()
102 .register_custom_property(property_registration)
103 .map_err(|error| match error {
104 RegisterPropertyError::InvalidName |
105 RegisterPropertyError::InvalidSyntax |
106 RegisterPropertyError::InvalidInitialValue |
107 RegisterPropertyError::NoInitialValue |
108 RegisterPropertyError::InitialValueNotComputationallyIndependent => Error::Syntax,
109 RegisterPropertyError::AlreadyRegistered => Error::InvalidModification,
110 })?;
111
112 Ok(())
113 }
114}