forked from mirrors/gecko-dev
112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_textdecoder_h_
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#define mozilla_dom_textdecoder_h_
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#include "mozilla/dom/NonRefcountedDOMObject.h"
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#include "mozilla/dom/TextDecoderBinding.h"
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#include "mozilla/dom/TypedArray.h"
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#include "mozilla/Encoding.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/UniquePtr.h"
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namespace mozilla {
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namespace dom {
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class ArrayBufferViewOrArrayBuffer;
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class TextDecoder final : public NonRefcountedDOMObject {
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public:
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// The WebIDL constructor.
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static TextDecoder* Constructor(const GlobalObject& aGlobal,
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const nsAString& aEncoding,
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const TextDecoderOptions& aOptions,
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ErrorResult& aRv) {
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auto txtDecoder = MakeUnique<TextDecoder>();
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txtDecoder->Init(aEncoding, aOptions, aRv);
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if (aRv.Failed()) {
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return nullptr;
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}
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return txtDecoder.release();
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}
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TextDecoder() : mFatal(false), mIgnoreBOM(false) {
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MOZ_COUNT_CTOR(TextDecoder);
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}
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MOZ_COUNTED_DTOR(TextDecoder)
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bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
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JS::MutableHandle<JSObject*> aReflector) {
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return TextDecoder_Binding::Wrap(aCx, this, aGivenProto, aReflector);
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}
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/**
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* Validates provided label and throws an exception if invalid label.
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*
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* @param aLabel The encoding label (case insensitive) provided.
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* @param aOptions The TextDecoderOptions to use.
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* @return aRv EncodingError exception else null.
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*/
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void Init(const nsAString& aLabel, const TextDecoderOptions& aOptions,
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ErrorResult& aRv);
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/**
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* Performs initialization with a Gecko-canonical encoding name (as opposed
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* to a label.)
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*
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* @param aEncoding An Encoding object
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* @param aOptions The TextDecoderOptions to use.
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*/
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void InitWithEncoding(NotNull<const Encoding*> aEncoding,
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const TextDecoderOptions& aOptions);
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/**
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* Return the encoding name.
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*
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* @param aEncoding, current encoding.
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*/
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void GetEncoding(nsAString& aEncoding);
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/**
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* Decodes incoming byte stream of characters in charset indicated by
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* encoding.
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*
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* The encoding algorithm state is reset if aOptions.mStream is not set.
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*
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* If the fatal flag is set then a decoding error will throw EncodingError.
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* Else the decoder will return a decoded string with replacement
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* character(s) for unidentified character(s).
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*
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* @param aView, incoming byte stream of characters to be decoded to
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* to UTF-16 code points.
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* @param aOptions, indicates if streaming or not.
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* @param aOutDecodedString, decoded string of UTF-16 code points.
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* @param aRv, error result.
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*/
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void Decode(mozilla::Span<const uint8_t> aInput, const bool aStream,
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nsAString& aOutDecodedString, ErrorResult& aRv);
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void Decode(const Optional<ArrayBufferViewOrArrayBuffer>& aBuffer,
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const TextDecodeOptions& aOptions, nsAString& aOutDecodedString,
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ErrorResult& aRv);
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bool Fatal() const { return mFatal; }
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bool IgnoreBOM() const { return mIgnoreBOM; }
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private:
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nsCString mEncoding;
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mozilla::UniquePtr<mozilla::Decoder> mDecoder;
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bool mFatal;
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bool mIgnoreBOM;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_textdecoder_h_
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