ad04d7ac9b
This is a concept fully defined in the Web IDL spec and doesn't belong in the DOM directory/namespace - not even DOMException, despite the name :^)
49 lines
1.7 KiB
C++
49 lines
1.7 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/Encoding/TextDecoder.h>
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#include <LibWeb/HTML/Window.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::create_with_global_object(HTML::Window& window, FlyString encoding)
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{
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auto decoder = TextCodec::decoder_for(encoding);
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if (!decoder)
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return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, String::formatted("Invalid encoding {}", encoding) };
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return JS::NonnullGCPtr(*window.heap().allocate<TextDecoder>(window.realm(), window, *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(HTML::Window& window, TextCodec::Decoder& decoder, FlyString encoding, bool fatal, bool ignore_bom)
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: PlatformObject(window.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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set_prototype(&window.cached_web_prototype("TextDecoder"));
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}
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TextDecoder::~TextDecoder() = default;
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// https://encoding.spec.whatwg.org/#dom-textdecoder-decode
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WebIDL::ExceptionOr<String> TextDecoder::decode(JS::Handle<JS::Object> const& input) const
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{
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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 DOM::OperationError::create(global_object(), "Failed to copy bytes from ArrayBuffer");
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auto& data_buffer = data_buffer_or_error.value();
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return m_decoder.to_utf8({ data_buffer.data(), data_buffer.size() });
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}
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}
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