ladybird/Userland/Libraries/LibWeb/Encoding/TextDecoder.cpp
Shannon Booth bad44f8fc9 LibWeb: Remove Bindings/Forward.h from LibWeb/Forward.h
This was resulting in a whole lot of rebuilding whenever a new IDL
interface was added.

Instead, just directly include the prototype in every C++ file which
needs it. While we only really need a forward declaration in each cpp
file; including the full prototype header (which itself only includes
LibJS/Object.h, which is already transitively brought in by
PlatformObject) - it seems like a small price to pay compared to what
feels like a full rebuild of LibWeb whenever a new IDL file is added.

Given all of these includes are only needed for the ::initialize
method, there is probably a smart way of avoiding this problem
altogether. I've considered both using some macro trickery or generating
these functions somehow instead.
2024-04-27 18:29:35 -04:00

62 lines
2.2 KiB
C++

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