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As noted in the linked spec issue, it's possible for an author to construct a CSSUnparsedValue that contains itself, meaning serialization would be infinitely recursive. So instead, detect that and then return an empty string, which copies Blink's solution to this issue. Stops `css/css-typed-om/cycle-in-unparsed-value-crash.html` from crashing after we implement converting a CSSUnparsedValue to an UnresolvedStyleValue, as that relies on serialization.
49 lines
1.8 KiB
C++
49 lines
1.8 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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#pragma once
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#include <LibWeb/CSS/CSSStyleValue.h>
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#include <LibWeb/WebIDL/Types.h>
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namespace Web::CSS {
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using CSSUnparsedSegment = Variant<String, GC::Ref<CSSVariableReferenceValue>>;
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using GCRootCSSUnparsedSegment = Variant<String, GC::Root<CSSVariableReferenceValue>>;
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// https://drafts.css-houdini.org/css-typed-om-1/#cssunparsedvalue
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class CSSUnparsedValue final : public CSSStyleValue {
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WEB_PLATFORM_OBJECT(CSSUnparsedValue, CSSStyleValue);
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GC_DECLARE_ALLOCATOR(CSSUnparsedValue);
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public:
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[[nodiscard]] static GC::Ref<CSSUnparsedValue> create(JS::Realm&, Vector<GCRootCSSUnparsedSegment>);
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static WebIDL::ExceptionOr<GC::Ref<CSSUnparsedValue>> construct_impl(JS::Realm&, Vector<GCRootCSSUnparsedSegment>);
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virtual ~CSSUnparsedValue() override;
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WebIDL::UnsignedLong length() const;
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virtual Optional<JS::Value> item_value(size_t index) const override;
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virtual WebIDL::ExceptionOr<void> set_value_of_existing_indexed_property(u32, JS::Value) override;
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virtual WebIDL::ExceptionOr<void> set_value_of_new_indexed_property(u32, JS::Value) override;
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virtual WebIDL::ExceptionOr<String> to_string() const override;
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private:
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explicit CSSUnparsedValue(JS::Realm&, Vector<CSSUnparsedSegment>);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Visitor&) override;
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bool contains_unparsed_value(CSSUnparsedValue const&) const;
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// https://drafts.css-houdini.org/css-typed-om-1/#dom-cssunparsedvalue-tokens-slot
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// They have a [[tokens]] internal slot, which is a list of USVStrings and CSSVariableReferenceValue objects.
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// This list is the object’s values to iterate over.
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Vector<CSSUnparsedSegment> m_tokens;
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};
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}
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