59 lines
2 KiB
C++
59 lines
2 KiB
C++
/*
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* Copyright (c) 2022, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/FlyString.h>
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#include <LibJS/Runtime/TypedArray.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Encoding/TextDecoder.h>
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#include <LibWeb/WebIDL/AbstractOperations.h>
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namespace Web::Encoding {
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WebIDL::ExceptionOr<JS::NonnullGCPtr<TextDecoder>> TextDecoder::construct_impl(JS::Realm& realm, FlyString encoding)
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{
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auto& vm = realm.vm();
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auto decoder = TextCodec::decoder_for(encoding);
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if (!decoder.has_value())
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return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, TRY_OR_THROW_OOM(vm, String::formatted("Invalid encoding {}", encoding)) };
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return realm.heap().allocate<TextDecoder>(realm, realm, *decoder, move(encoding), false, false);
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}
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// https://encoding.spec.whatwg.org/#dom-textdecoder
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TextDecoder::TextDecoder(JS::Realm& realm, TextCodec::Decoder& decoder, FlyString encoding, bool fatal, bool ignore_bom)
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: PlatformObject(realm)
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, m_decoder(decoder)
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, m_encoding(move(encoding))
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, m_fatal(fatal)
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, m_ignore_bom(ignore_bom)
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{
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}
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TextDecoder::~TextDecoder() = default;
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void TextDecoder::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::TextDecoderPrototype>(realm, "TextDecoder"));
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}
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// https://encoding.spec.whatwg.org/#dom-textdecoder-decode
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WebIDL::ExceptionOr<String> TextDecoder::decode(Optional<JS::Handle<JS::Object>> const& input) const
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{
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if (!input.has_value())
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return TRY_OR_THROW_OOM(vm(), m_decoder.to_utf8({}));
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// FIXME: Implement the streaming stuff.
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auto data_buffer_or_error = WebIDL::get_buffer_source_copy(*input->cell());
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if (data_buffer_or_error.is_error())
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return WebIDL::OperationError::create(realm(), "Failed to copy bytes from ArrayBuffer"_fly_string);
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auto& data_buffer = data_buffer_or_error.value();
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return TRY_OR_THROW_OOM(vm(), m_decoder.to_utf8({ data_buffer.data(), data_buffer.size() }));
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}
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}
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