53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021-2022, Linus Groh <linusg@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/TextEncoder.h>
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namespace Web::Encoding {
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JS::NonnullGCPtr<TextEncoder> TextEncoder::construct_impl(JS::Realm& realm)
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{
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return realm.heap().allocate<TextEncoder>(realm, realm);
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}
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TextEncoder::TextEncoder(JS::Realm& realm)
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: PlatformObject(realm)
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{
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set_prototype(&Bindings::cached_web_prototype(realm, "TextEncoder"));
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}
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TextEncoder::~TextEncoder() = default;
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// https://encoding.spec.whatwg.org/#dom-textencoder-encode
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JS::Uint8Array* TextEncoder::encode(DeprecatedString const& input) const
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{
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// NOTE: The AK::DeprecatedString returned from PrimitiveString::string() is always UTF-8, regardless of the internal string type, so most of these steps are no-ops.
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// 1. Convert input to an I/O queue of scalar values.
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// 2. Let output be the I/O queue of bytes « end-of-queue ».
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// 3. While true:
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// 1. Let item be the result of reading from input.
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// 2. Let result be the result of processing an item with item, an instance of the UTF-8 encoder, input, output, and "fatal".
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// 3. Assert: result is not an error.
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// 4. If result is finished, then convert output into a byte sequence and return a Uint8Array object wrapping an ArrayBuffer containing output.
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auto byte_buffer = input.to_byte_buffer();
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auto array_length = byte_buffer.size();
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auto array_buffer = JS::ArrayBuffer::create(realm(), move(byte_buffer));
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return JS::Uint8Array::create(realm(), array_length, *array_buffer);
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}
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// https://encoding.spec.whatwg.org/#dom-textencoder-encoding
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FlyString const& TextEncoder::encoding()
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{
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static FlyString encoding = "utf-8"sv;
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return encoding;
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}
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}
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