26b0801a78
Make CSS Typed OM to_string() implementations produce Utf16String instead of building UTF-8 strings and converting at the JS binding boundary. Use Utf16StringBuilder for numeric, math, and transform serialization paths that already feed CSS Typed OM stringification. Keep the older CSSOM StyleValue serializer on StringBuilder for now, and convert only where Typed OM source values or parser re-entry still need the existing UTF-8 representation.
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
/*
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* Copyright (c) 2025, Sam Atkins <sam@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "CSSImageValue.h"
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#include <LibWeb/Bindings/CSSImageValue.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/CSS/PropertyNameAndID.h>
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#include <LibWeb/CSS/StyleValues/StyleValue.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::CSS {
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GC_DEFINE_ALLOCATOR(CSSImageValue);
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GC::Ref<CSSImageValue> CSSImageValue::create(JS::Realm& realm, NonnullRefPtr<StyleValue const> source_value)
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{
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return realm.create<CSSImageValue>(realm, move(source_value));
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}
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CSSImageValue::CSSImageValue(JS::Realm& realm, NonnullRefPtr<StyleValue const> source_value)
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: CSSStyleValue(realm, move(source_value))
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{
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}
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void CSSImageValue::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSImageValue);
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Base::initialize(realm);
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}
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// https://drafts.css-houdini.org/css-typed-om-1/#stylevalue-serialization
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WebIDL::ExceptionOr<Utf16String> CSSImageValue::to_string() const
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{
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// AD-HOC: The spec doesn't say how to serialize this, as it's intentionally a black box.
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// We just rely on CSSStyleValue serializing its held StyleValue.
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return Base::to_string();
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}
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// https://drafts.css-houdini.org/css-typed-om-1/#create-an-internal-representation
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WebIDL::ExceptionOr<NonnullRefPtr<StyleValue const>> CSSImageValue::create_an_internal_representation(PropertyNameAndID const& property, PerformTypeCheck perform_type_check) const
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{
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// If value is a CSSStyleValue subclass,
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// If value does not match the grammar of a list-valued property iteration of property, throw a TypeError.
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// NB: https://drafts.css-houdini.org/css-typed-om-1/#cssstylevalue-match-a-grammar doesn't list CSSImageValue, but
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// we should match <image>.
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bool const matches_grammar = [&] {
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if (property.is_custom_property()) {
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// FIXME: If this is a registered custom property, check if that allows <image>.
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return true;
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}
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return property_accepts_type(property.id(), ValueType::Image);
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}();
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if (perform_type_check == PerformTypeCheck::Yes && !matches_grammar) {
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return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, MUST(String::formatted("Property '{}' does not accept <image>", property.name())) };
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}
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// FIXME: If any component of property’s CSS grammar has a limited numeric range, and the corresponding part of value
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// is a CSSUnitValue that is outside of that range, replace that value with the result of wrapping it in a
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// fresh CSSMathSum whose values internal slot contains only that part of value.
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// Return the value.
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return NonnullRefPtr { *source_value() };
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}
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}
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