mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-31 05:10:57 +00:00
39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
|
/*
|
||
|
|
* Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "PseudoElementParsing.h"
|
||
|
|
#include <LibWeb/CSS/Parser/Parser.h>
|
||
|
|
|
||
|
|
namespace Web::Animations {
|
||
|
|
|
||
|
|
// https://drafts.csswg.org/web-animations-1/#dom-keyframeeffect-pseudo-element-parsing
|
||
|
|
WebIDL::ExceptionOr<Optional<CSS::Selector::PseudoElement>> pseudo_element_parsing(JS::Realm& realm, Optional<String> const& value)
|
||
|
|
{
|
||
|
|
// 1. Given the value value, perform the following steps:
|
||
|
|
|
||
|
|
// 2. If value is not null and is an invalid <pseudo-element-selector>,
|
||
|
|
Optional<CSS::Selector::PseudoElement> pseudo_element;
|
||
|
|
if (value.has_value()) {
|
||
|
|
pseudo_element = parse_pseudo_element_selector(CSS::Parser::ParsingContext { realm }, *value);
|
||
|
|
if (!pseudo_element.has_value()) {
|
||
|
|
// 1. Throw a DOMException with error name "SyntaxError".
|
||
|
|
// 2. Abort.
|
||
|
|
return WebIDL::SyntaxError::create(realm, MUST(String::formatted("Invalid pseudo-element selector: \"{}\"", value.value())));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// 3. If value is one of the legacy Selectors Level 2 single-colon selectors (':before', ':after', ':first-letter', or ':first-line'),
|
||
|
|
// then return the equivalent two-colon selector (e.g. '::before').
|
||
|
|
if (value.has_value() && value->is_one_of(":before", ":after", ":first-letter", ":first-line")) {
|
||
|
|
return CSS::Selector::PseudoElement::from_string(MUST(value->substring_from_byte_offset(1)));
|
||
|
|
}
|
||
|
|
|
||
|
|
// 4. Otherwise, return value.
|
||
|
|
return pseudo_element;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|