d8759d9656
We were previously assuming that the input offsets and lengths were all in raw byte offsets into a UTF-8 string. While internally our String representation may be in UTF-8 from the external world it is seen as UTF-16, with code unit offsets passed through, and used as the returned length. Beforehand, the included test included in this commit would crash ladybird (and otherwise return wrong values). The implementation here is very inefficient, I am sure there is a much smarter way to write it so that we would not need a conversion from UTF-8 to a UTF-16 string (and then back again). Fixes: #20971
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.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 <AK/String.h>
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#include <LibWeb/DOM/ChildNode.h>
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#include <LibWeb/DOM/Node.h>
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#include <LibWeb/DOM/NonDocumentTypeChildNode.h>
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namespace Web::DOM {
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// https://dom.spec.whatwg.org/#characterdata
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class CharacterData
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: public Node
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, public ChildNode<CharacterData>
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, public NonDocumentTypeChildNode<CharacterData> {
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WEB_PLATFORM_OBJECT(CharacterData, Node);
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JS_DECLARE_ALLOCATOR(CharacterData);
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public:
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virtual ~CharacterData() override = default;
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String const& data() const { return m_data; }
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void set_data(String const&);
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unsigned length_in_utf16_code_units() const
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{
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// FIXME: This is inefficient!
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auto utf16_data = MUST(AK::utf8_to_utf16(m_data));
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return Utf16View { utf16_data }.length_in_code_units();
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}
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WebIDL::ExceptionOr<String> substring_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units) const;
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WebIDL::ExceptionOr<void> append_data(String const&);
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WebIDL::ExceptionOr<void> insert_data(size_t offset_in_utf16_code_units, String const&);
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WebIDL::ExceptionOr<void> delete_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units);
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WebIDL::ExceptionOr<void> replace_data(size_t offset_in_utf16_code_units, size_t count_in_utf16_code_units, String const&);
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protected:
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CharacterData(Document&, NodeType, String const&);
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virtual void initialize(JS::Realm&) override;
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private:
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String m_data;
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};
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}
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