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LibWeb: Port the CSS namespace to IDL

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This commit is contained in:
Timothy Flynn 2023-03-15 10:55:53 -04:00 • committed by Tim Flynn
parent 020c2b59c4
commit 2d45e1fca5
8 changed files with 97 additions and 117 deletions
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86
Userland/Libraries/LibWeb/Bindings/CSSNamespace.cpp
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@ -1,86 +0,0 @@
/*
* Copyright (c) 2021-2023, 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(ConstructWithPrototypeTag::Tag, *realm.intrinsics().object_prototype())
{
}
JS::ThrowCompletionOr<void> CSSNamespace::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Object::initialize(realm));
u8 attr = JS::Attribute::Enumerable;
define_native_function(realm, "escape", escape, 1, attr);
define_native_function(realm, "supports", supports, 2, attr);
return {};
}
// 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::PrimitiveString::create(vm, TRY_OR_THROW_OOM(vm, Web::CSS::serialize_an_identifier(identifier)));
}
// https://www.w3.org/TR/css-conditional-3/#dom-css-supports
JS_DEFINE_NATIVE_FUNCTION(CSSNamespace::supports)
{
auto& realm = *vm.current_realm();
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_deprecated_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_deprecated_string(vm));
if (parse_css_value(CSS::Parser::ParsingContext { realm }, 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_deprecated_string(vm));
// If conditionText, parsed and evaluated as a <supports-condition>, would return true, return true.
if (auto supports = parse_css_supports(CSS::Parser::ParsingContext { realm }, 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(CSS::Parser::ParsingContext { realm }, DeprecatedString::formatted("({})", supports_text)); supports && supports->matches())
return JS::Value(true);
// Otherwise, return false.
return JS::Value(false);
}
}
}

28
Userland/Libraries/LibWeb/Bindings/CSSNamespace.h
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@ -1,28 +0,0 @@
/*
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Runtime/Object.h>
#include <LibWeb/CSS/Serialize.h>
namespace Web::Bindings {
// The `CSS` namespace object in IDL. https://www.w3.org/TR/cssom-1/#namespacedef-css
class CSSNamespace final : public JS::Object {
JS_OBJECT(CSSNamespace, JS::Object)
public:
explicit CSSNamespace(JS::Realm&);
virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
virtual ~CSSNamespace() override = default;
private:
JS_DECLARE_NATIVE_FUNCTION(escape);
JS_DECLARE_NATIVE_FUNCTION(supports);
};
}