mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-30 21:01:00 +00:00
29 lines
957 B
C++
29 lines
957 B
C++
/*
|
||
* Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#pragma once
|
||
|
||
#include <AK/StringView.h>
|
||
#include <LibWeb/CSS/PropertyID.h>
|
||
|
||
namespace Web::CSS {
|
||
|
||
static bool is_invalid_custom_property_name_string(StringView string)
|
||
{
|
||
// https://drafts.csswg.org/css-variables-2/#typedef-custom-property-name
|
||
// The <custom-property-name> production corresponds to this: it’s defined as any <dashed-ident>
|
||
// (a valid identifier that starts with two dashes), except -- itself, which is reserved for future use by CSS.
|
||
return string == "--"sv;
|
||
}
|
||
|
||
// https://drafts.css-houdini.org/css-typed-om-1/#custom-property-name-string
|
||
static bool is_a_custom_property_name_string(StringView string)
|
||
{
|
||
// A string is a custom property name string if it starts with two dashes (U+002D HYPHEN-MINUS), like --foo.
|
||
return string.starts_with("--"sv) && !is_invalid_custom_property_name_string(string);
|
||
}
|
||
|
||
}
|