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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_textdecoder_h_
#define mozilla_dom_textdecoder_h_
#include "mozilla/dom/NonRefcountedDOMObject.h"
#include "mozilla/dom/TextDecoderBinding.h"
#include "mozilla/dom/TypedArray.h"
#include "nsAutoPtr.h"
#include "nsIUnicodeDecoder.h"
namespace mozilla {
class ErrorResult;
namespace dom {
class ArrayBufferViewOrArrayBuffer;
class TextDecoder final
: public NonRefcountedDOMObject
{
public:
// The WebIDL constructor.
static TextDecoder*
Constructor(const GlobalObject& aGlobal,
const nsAString& aEncoding,
const TextDecoderOptions& aOptions,
ErrorResult& aRv)
{
nsAutoPtr<TextDecoder> txtDecoder(new TextDecoder());
txtDecoder->Init(aEncoding, aOptions.mFatal, aRv);
if (aRv.Failed()) {
return nullptr;
}
return txtDecoder.forget();
}
TextDecoder()
: mFatal(false)
{
MOZ_COUNT_CTOR(TextDecoder);
}
~TextDecoder()
{
MOZ_COUNT_DTOR(TextDecoder);
}
bool WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto, JS::MutableHandle<JSObject*> aReflector)
{
return TextDecoderBinding::Wrap(aCx, this, aGivenProto, aReflector);
}
/**
* Validates provided label and throws an exception if invalid label.
*
* @param aLabel The encoding label (case insensitive) provided.
* @param aFatal indicates whether to throw an 'EncodingError'
* exception or not when decoding.
* @return aRv EncodingError exception else null.
*/
void Init(const nsAString& aLabel, const bool aFatal, ErrorResult& aRv);
/**
* Performs initialization with a Gecko-canonical encoding name (as opposed
* to a label.)
*
* @param aEncoding A Gecko-canonical encoding name
* @param aFatal indicates whether to throw an 'EncodingError'
* exception or not when decoding.
*/
void InitWithEncoding(const nsACString& aEncoding, const bool aFatal);
/**
* Return the encoding name.
*
* @param aEncoding, current encoding.
*/
void GetEncoding(nsAString& aEncoding);
/**
* Decodes incoming byte stream of characters in charset indicated by
* encoding.
*
* The encoding algorithm state is reset if aOptions.mStream is not set.
*
* If the fatal flag is set then a decoding error will throw EncodingError.
* Else the decoder will return a decoded string with replacement
* character(s) for unidentified character(s).
*
* @param aView, incoming byte stream of characters to be decoded to
* to UTF-16 code points.
* @param aOptions, indicates if streaming or not.
* @param aOutDecodedString, decoded string of UTF-16 code points.
* @param aRv, error result.
*/
void Decode(const char* aInput, const int32_t aLength,
const bool aStream, nsAString& aOutDecodedString,
ErrorResult& aRv);
void Decode(const Optional<ArrayBufferViewOrArrayBuffer>& aBuffer,
const TextDecodeOptions& aOptions,
nsAString& aOutDecodedString,
ErrorResult& aRv);
bool Fatal() const {
return mFatal;
}
private:
nsCString mEncoding;
nsCOMPtr<nsIUnicodeDecoder> mDecoder;
bool mFatal;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_textdecoder_h_
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