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/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_CODEC_CJK_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_CODEC_CJK_H_
#include <optional>
#include "third_party/blink/renderer/platform/wtf/functional.h"
#include "third_party/blink/renderer/platform/wtf/text/code_point_iterator.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/text_codec.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/wtf_export.h"
namespace WTF {
// TextCodecCJK supports following encodings:
// * Japanese characters (EUC-JP, ISO-2022-JP, ShiftJIS)
// * Korean characters (EUC-KR)
// * Simplified Chinese characters (GB18030, GBK)
// Note: since setting up Big5 encode table failed with overflow error
// when we use it with ICU4C bundled with Chromium, we did not include
// Big5.
//
// ICU4C behaves much different from the WHATWG specification
// (https://encoding.spec.whatwg.org/). It was difficult to fulfill the
// specification by using TextCodecICU.
class TextCodecCJK final : public TextCodec {
public:
class Decoder;
static void RegisterEncodingNames(EncodingNameRegistrar);
static void RegisterCodecs(TextCodecRegistrar);
// Returns true if the given `name` is supported.
WTF_EXPORT static bool IsSupported(StringView name);
private:
enum class Encoding : uint8_t;
explicit TextCodecCJK(Encoding);
WTF_EXPORT static std::unique_ptr<TextCodec> Create(const TextEncoding&,
const void*);
String Decode(base::span<const uint8_t> data,
FlushBehavior,
bool stop_on_error,
bool& saw_error) override;
std::string Encode(base::span<const UChar>, UnencodableHandling) override;
std::string Encode(base::span<const LChar>, UnencodableHandling) override;
Vector<uint8_t> EncodeCommon(StringView string, UnencodableHandling) const;
const Encoding encoding_;
std::unique_ptr<Decoder> decoder_;
};
} // namespace WTF
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_TEXT_CODEC_CJK_H_
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