138 lines
4.6 KiB
JavaScript
138 lines
4.6 KiB
JavaScript
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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function initializeTextDecoderStream()
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{
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"use strict";
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const label = arguments.length >= 1 ? arguments[0] : "utf-8";
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const options = arguments.length >= 2 ? arguments[1] : { };
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const startAlgorithm = () => {
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return @Promise.@resolve();
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};
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const transformAlgorithm = (chunk) => {
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const decoder = @getByIdDirectPrivate(this, "textDecoderStreamDecoder");
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let buffer;
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try {
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buffer = decoder.@decode(chunk);
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} catch (e) {
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return @Promise.@reject(e);
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}
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if (buffer) {
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const transformStream = @getByIdDirectPrivate(this, "textDecoderStreamTransform");
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const controller = @getByIdDirectPrivate(transformStream, "controller");
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@transformStreamDefaultControllerEnqueue(controller, buffer);
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}
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return @Promise.@resolve();
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};
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const flushAlgorithm = () => {
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const decoder = @getByIdDirectPrivate(this, "textDecoderStreamDecoder");
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let buffer;
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try {
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buffer = decoder.@flush();
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} catch (e) {
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return @Promise.@reject(e);
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}
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if (buffer) {
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const transformStream = @getByIdDirectPrivate(this, "textDecoderStreamTransform");
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const controller = @getByIdDirectPrivate(transformStream, "controller");
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@transformStreamDefaultControllerEnqueue(controller, buffer);
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}
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return @Promise.@resolve();
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};
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const transform = @createTransformStream(startAlgorithm, transformAlgorithm, flushAlgorithm);
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@putByIdDirectPrivate(this, "textDecoderStreamTransform", transform);
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const fatal = !!options.fatal;
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const ignoreBOM = !!options.ignoreBOM;
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const decoder = new @TextDecoderStreamDecoder(label, fatal, ignoreBOM);
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@putByIdDirectPrivate(this, "fatal", fatal);
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@putByIdDirectPrivate(this, "ignoreBOM", ignoreBOM);
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@putByIdDirectPrivate(this, "encoding", decoder.@encoding());
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@putByIdDirectPrivate(this, "textDecoderStreamDecoder", decoder);
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return this;
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}
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@getter
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function encoding()
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{
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"use strict";
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if (!@getByIdDirectPrivate(this, "textDecoderStreamTransform"))
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throw @makeThisTypeError("TextDecoderStream", "encoding");
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return @getByIdDirectPrivate(this, "encoding");
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}
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@getter
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function fatal()
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{
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"use strict";
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if (!@getByIdDirectPrivate(this, "textDecoderStreamTransform"))
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throw @makeThisTypeError("TextDecoderStream", "fatal");
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return @getByIdDirectPrivate(this, "fatal");
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}
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@getter
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function ignoreBOM()
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{
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"use strict";
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if (!@getByIdDirectPrivate(this, "textDecoderStreamTransform"))
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throw @makeThisTypeError("TextDecoderStream", "ignoreBOM");
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return @getByIdDirectPrivate(this, "ignoreBOM");
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}
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@getter
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function readable()
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{
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"use strict";
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const transform = @getByIdDirectPrivate(this, "textDecoderStreamTransform");
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if (!transform)
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throw @makeThisTypeError("TextDecoderStream", "readable");
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return @getByIdDirectPrivate(transform, "readable");
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}
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@getter
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function writable()
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{
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"use strict";
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const transform = @getByIdDirectPrivate(this, "textDecoderStreamTransform");
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if (!transform)
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throw @makeThisTypeError("TextDecoderStream", "writable");
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return @getByIdDirectPrivate(transform, "writable");
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}
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