mirror of
https://github.com/RGBCube/serenity
synced 2025-05-20 00:35:07 +00:00
50428ea8d2
Intrinsics, i.e. mostly constructor and prototype objects, but also things like empty and new object shape now live on a new heap-allocated JS::Intrinsics object, thus completing the long journey of taking all the magic away from the global object. This represents the Realm's [[Intrinsics]] slot in the spec and matches its existing [[GlobalObject]] / [[GlobalEnv]] slots in terms of architecture. In the majority of cases it should now be possibly to fully allocate a regular object without the global object existing, and in fact that's what we do now - the realm is allocated before the global object, and the intrinsics between both :^)
82 lines
3.2 KiB
C++
82 lines
3.2 KiB
C++
/*
|
||
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include <LibJS/Runtime/ErrorTypes.h>
|
||
#include <LibJS/Runtime/GlobalObject.h>
|
||
#include <LibJS/Runtime/VM.h>
|
||
#include <LibJS/Runtime/Value.h>
|
||
#include <LibWeb/Bindings/CSSNamespace.h>
|
||
#include <LibWeb/CSS/Parser/Parser.h>
|
||
|
||
namespace Web::Bindings {
|
||
|
||
CSSNamespace::CSSNamespace(JS::Realm& realm)
|
||
: JS::Object(*realm.intrinsics().object_prototype())
|
||
{
|
||
}
|
||
|
||
void CSSNamespace::initialize(JS::Realm& realm)
|
||
{
|
||
Object::initialize(realm);
|
||
u8 attr = JS::Attribute::Enumerable;
|
||
define_native_function(realm, "escape", escape, 1, attr);
|
||
define_native_function(realm, "supports", supports, 2, attr);
|
||
}
|
||
|
||
// https://www.w3.org/TR/cssom-1/#dom-css-escape
|
||
JS_DEFINE_NATIVE_FUNCTION(CSSNamespace::escape)
|
||
{
|
||
if (!vm.argument_count())
|
||
return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountAtLeastOne, "CSS.escape");
|
||
|
||
auto identifier = TRY(vm.argument(0).to_string(vm));
|
||
return JS::js_string(vm, Web::CSS::serialize_an_identifier(identifier));
|
||
}
|
||
|
||
// https://www.w3.org/TR/css-conditional-3/#dom-css-supports
|
||
JS_DEFINE_NATIVE_FUNCTION(CSSNamespace::supports)
|
||
{
|
||
if (!vm.argument_count())
|
||
return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountAtLeastOne, "CSS.supports");
|
||
|
||
if (vm.argument_count() >= 2) {
|
||
// When the supports(property, value) method is invoked with two arguments property and value:
|
||
auto property_name = TRY(vm.argument(0).to_string(vm));
|
||
|
||
// If property is an ASCII case-insensitive match for any defined CSS property that the UA supports,
|
||
// and value successfully parses according to that property’s grammar, return true.
|
||
auto property = CSS::property_id_from_string(property_name);
|
||
if (property != CSS::PropertyID::Invalid) {
|
||
auto value_string = TRY(vm.argument(1).to_string(vm));
|
||
if (parse_css_value({}, value_string, property))
|
||
return JS::Value(true);
|
||
}
|
||
// Otherwise, if property is a custom property name string, return true.
|
||
// FIXME: This check is not enough to make sure this is a valid custom property name, but it's close enough.
|
||
else if (property_name.starts_with("--"sv) && property_name.length() >= 3) {
|
||
return JS::Value(true);
|
||
}
|
||
|
||
// Otherwise, return false.
|
||
return JS::Value(false);
|
||
} else {
|
||
// When the supports(conditionText) method is invoked with a single conditionText argument:
|
||
auto supports_text = TRY(vm.argument(0).to_string(vm));
|
||
|
||
// If conditionText, parsed and evaluated as a <supports-condition>, would return true, return true.
|
||
if (auto supports = parse_css_supports({}, supports_text); supports && supports->matches())
|
||
return JS::Value(true);
|
||
|
||
// Otherwise, If conditionText, wrapped in parentheses and then parsed and evaluated as a <supports-condition>, would return true, return true.
|
||
if (auto supports = parse_css_supports({}, String::formatted("({})", supports_text)); supports && supports->matches())
|
||
return JS::Value(true);
|
||
|
||
// Otherwise, return false.
|
||
return JS::Value(false);
|
||
}
|
||
}
|
||
|
||
}
|