mirror of
https://github.com/LadybirdBrowser/ladybird.git
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97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*
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* Copyright (c) 2021-2023, Tim Flynn <trflynn89@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/ByteString.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/Types.h>
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#include <AK/Utf16View.h>
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#include <AK/Vector.h>
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#include <LibJS/Runtime/Completion.h>
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namespace JS {
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namespace Detail {
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class Utf16StringImpl : public RefCounted<Utf16StringImpl> {
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public:
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~Utf16StringImpl() = default;
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[[nodiscard]] static NonnullRefPtr<Utf16StringImpl> create();
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[[nodiscard]] static NonnullRefPtr<Utf16StringImpl> create(Utf16Data);
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[[nodiscard]] static NonnullRefPtr<Utf16StringImpl> create(StringView);
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[[nodiscard]] static NonnullRefPtr<Utf16StringImpl> create(Utf16View const&);
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Utf16Data const& string() const;
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Utf16View view() const;
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[[nodiscard]] u32 hash() const
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{
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if (!m_has_hash) {
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m_hash = compute_hash();
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m_has_hash = true;
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}
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return m_hash;
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}
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[[nodiscard]] bool operator==(Utf16StringImpl const& other) const { return string() == other.string(); }
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private:
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Utf16StringImpl() = default;
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explicit Utf16StringImpl(Utf16Data string);
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[[nodiscard]] u32 compute_hash() const;
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mutable bool m_has_hash { false };
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mutable u32 m_hash { 0 };
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Utf16Data m_string;
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};
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}
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class Utf16String {
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public:
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[[nodiscard]] static Utf16String create();
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[[nodiscard]] static Utf16String create(Utf16Data);
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[[nodiscard]] static Utf16String create(StringView);
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[[nodiscard]] static Utf16String create(Utf16View const&);
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Utf16Data const& string() const;
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Utf16View view() const;
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Utf16View substring_view(size_t code_unit_offset, size_t code_unit_length) const;
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Utf16View substring_view(size_t code_unit_offset) const;
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[[nodiscard]] String to_utf8() const;
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[[nodiscard]] ByteString to_byte_string() const;
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u16 code_unit_at(size_t index) const;
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size_t length_in_code_units() const;
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bool is_empty() const;
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[[nodiscard]] u32 hash() const { return m_string->hash(); }
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[[nodiscard]] bool operator==(Utf16String const& other) const
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{
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if (m_string == other.m_string)
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return true;
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return *m_string == *other.m_string;
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}
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private:
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explicit Utf16String(NonnullRefPtr<Detail::Utf16StringImpl>);
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NonnullRefPtr<Detail::Utf16StringImpl> m_string;
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};
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}
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namespace AK {
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template<>
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struct Traits<JS::Utf16String> : public DefaultTraits<JS::Utf16String> {
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static unsigned hash(JS::Utf16String const& s) { return s.hash(); }
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};
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}
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