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77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
/* 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_textdecoderbase_h_
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#define mozilla_dom_textdecoderbase_h_
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/TypedArray.h"
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#include "nsIUnicodeDecoder.h"
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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class TextDecoderBase
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{
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public:
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TextDecoderBase()
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: mFatal(false)
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{}
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virtual
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~TextDecoderBase()
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{}
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/**
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* Validates provided encoding and throws an exception if invalid encoding.
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* If no encoding is provided then mEncoding is default initialised to "utf-8".
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*
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* @param aEncoding Optional encoding (case insensitive) provided.
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* Default value is "utf-8" if no encoding is provided.
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* @param aFatal aFatal, indicates whether to throw an 'EncodingError'
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* exception or not.
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* @return aRv EncodingError exception else null.
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*/
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void Init(const nsAString& aEncoding, const bool aFatal, ErrorResult& aRv);
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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(const char* aInput, const int32_t aLength,
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const bool aStream, nsAString& aOutDecodedString,
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ErrorResult& aRv);
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private:
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nsCString mEncoding;
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nsCOMPtr<nsIUnicodeDecoder> mDecoder;
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bool mFatal;
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};
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} // dom
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} // mozilla
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#endif // mozilla_dom_textdecoderbase_h_
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