forked from mirrors/gecko-dev
a498868ba9
Reviewed by @emilio in [bug 1329088](https://bugzilla.mozilla.org/show_bug.cgi?id=1329088). r? @emilio --- - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors Source-Repo: https://github.com/servo/servo Source-Revision: 5c56640508b4f24a67fe92c5d3179d89d030e959 --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 1f33735051b5be8d58a32eec5044f6365b6dab32
51 lines
2.1 KiB
Rust
51 lines
2.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use cssparser::{Parser, serialize_identifier};
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use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use dom::bindings::error::Fallible;
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use dom::bindings::reflector::Reflector;
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use dom::bindings::str::DOMString;
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use dom::window::Window;
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use dom_struct::dom_struct;
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use style::parser::{LengthParsingMode, ParserContext};
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use style::stylesheets::CssRuleType;
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use style::supports::{Declaration, parse_condition_or_declaration};
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#[dom_struct]
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pub struct CSS {
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reflector_: Reflector,
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}
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impl CSS {
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/// http://dev.w3.org/csswg/cssom/#serialize-an-identifier
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pub fn Escape(_: &Window, ident: DOMString) -> Fallible<DOMString> {
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let mut escaped = String::new();
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serialize_identifier(&ident, &mut escaped).unwrap();
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Ok(DOMString::from(escaped))
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}
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/// https://drafts.csswg.org/css-conditional/#dom-css-supports
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pub fn Supports(win: &Window, property: DOMString, value: DOMString) -> bool {
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let decl = Declaration { prop: property.into(), val: value.into() };
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let url = win.Document().url();
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let context = ParserContext::new_for_cssom(&url, win.css_error_reporter(), Some(CssRuleType::Supports),
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LengthParsingMode::Default);
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decl.eval(&context)
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}
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/// https://drafts.csswg.org/css-conditional/#dom-css-supports
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pub fn Supports_(win: &Window, condition: DOMString) -> bool {
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let mut input = Parser::new(&condition);
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let cond = parse_condition_or_declaration(&mut input);
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if let Ok(cond) = cond {
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let url = win.Document().url();
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let context = ParserContext::new_for_cssom(&url, win.css_error_reporter(), Some(CssRuleType::Supports),
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LengthParsingMode::Default);
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cond.eval(&context)
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} else {
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false
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}
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}
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}
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