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108 lines
3.0 KiB
C++
108 lines
3.0 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_textencoder_h_
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#define mozilla_dom_textencoder_h_
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#include "mozilla/dom/NonRefcountedDOMObject.h"
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#include "mozilla/dom/TextEncoderBinding.h"
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#include "mozilla/dom/TypedArray.h"
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#include "nsIUnicodeEncoder.h"
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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class TextEncoder MOZ_FINAL : public NonRefcountedDOMObject
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{
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public:
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// The WebIDL constructor.
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static TextEncoder*
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Constructor(const GlobalObject& aGlobal,
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const nsAString& aEncoding,
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ErrorResult& aRv)
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{
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nsAutoPtr<TextEncoder> txtEncoder(new TextEncoder());
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txtEncoder->Init(aEncoding, aRv);
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if (aRv.Failed()) {
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return nullptr;
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}
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return txtEncoder.forget();
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}
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TextEncoder()
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{
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}
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virtual
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~TextEncoder()
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{}
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JSObject* WrapObject(JSContext* aCx, bool* aTookOwnership)
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{
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return TextEncoderBinding::Wrap(aCx, this, aTookOwnership);
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}
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void Encode(JSContext* aCx,
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JS::Handle<JSObject*> aObj,
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const nsAString& aString,
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const TextEncodeOptions& aOptions,
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JS::MutableHandle<JSObject*> aRetval,
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ErrorResult& aRv) {
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TextEncoder::Encode(aCx, aObj, aString, aOptions.mStream, aRetval, aRv);
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}
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protected:
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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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* (valid values are "utf-8", "utf-16", "utf-16be")
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* Default value is "utf-8" if no encoding is provided.
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* @return aRv EncodingError exception else null.
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*/
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void Init(const nsAString& aEncoding, ErrorResult& aRv);
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public:
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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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* Encodes incoming utf-16 code units/ DOM string to the requested encoding.
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*
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* @param aCx Javascript context.
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* @param aObj the wrapper of the TextEncoder
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* @param aString utf-16 code units to be encoded.
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* @param aOptions Streaming option. Initialised by default to false.
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* If the streaming option is false, then the encoding
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* algorithm state will get reset. If set to true then
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* the previous encoding is reused/continued.
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* @return JSObject* The Uint8Array wrapped in a JS object. Returned via
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* the aRetval out param.
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*/
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void Encode(JSContext* aCx,
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JS::Handle<JSObject*> aObj,
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const nsAString& aString,
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const bool aStream,
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JS::MutableHandle<JSObject*> aRetval,
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ErrorResult& aRv);
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private:
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nsCString mEncoding;
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nsCOMPtr<nsIUnicodeEncoder> mEncoder;
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};
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} // dom
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} // mozilla
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#endif // mozilla_dom_textencoder_h_
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