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e6535142a8
The name ReadableStreamController collides with the same-named Web IDL union type. Differential Revision: https://phabricator.services.mozilla.com/D244385
129 lines
4.1 KiB
C++
129 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ReadableStreamBYOBRequest.h"
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#include "mozilla/dom/ByteStreamHelpers.h"
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#include "js/ArrayBuffer.h"
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#include "js/TypeDecls.h"
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#include "mozilla/dom/ReadableByteStreamController.h"
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#include "mozilla/dom/ReadableStream.h"
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#include "mozilla/dom/ReadableStreamBYOBRequestBinding.h"
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#include "js/experimental/TypedData.h"
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#include "mozilla/dom/ReadableStreamControllerBase.h"
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#include "nsCOMPtr.h"
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#include "nsIGlobalObject.h"
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#include "nsWrapperCache.h"
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namespace mozilla::dom {
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using namespace streams_abstract;
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ReadableStreamBYOBRequest::ReadableStreamBYOBRequest(nsIGlobalObject* aGlobal)
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: mGlobal(aGlobal) {
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mozilla::HoldJSObjects(this);
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}
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ReadableStreamBYOBRequest::~ReadableStreamBYOBRequest() {
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mozilla::DropJSObjects(this);
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}
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_WITH_JS_MEMBERS(ReadableStreamBYOBRequest,
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(mGlobal, mController),
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(mView))
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ReadableStreamBYOBRequest)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ReadableStreamBYOBRequest)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ReadableStreamBYOBRequest)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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JSObject* ReadableStreamBYOBRequest::WrapObject(
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JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
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return ReadableStreamBYOBRequest_Binding::Wrap(aCx, this, aGivenProto);
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}
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// https://streams.spec.whatwg.org/#rs-byob-request-view
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void ReadableStreamBYOBRequest::GetView(
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JSContext* cx, JS::MutableHandle<JSObject*> aRetVal) const {
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// Step 1.
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aRetVal.set(mView);
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}
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// https://streams.spec.whatwg.org/#rs-byob-request-respond
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void ReadableStreamBYOBRequest::Respond(JSContext* aCx, uint64_t bytesWritten,
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ErrorResult& aRv) {
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// Step 1.
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if (!mController) {
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aRv.ThrowTypeError("Undefined Controller");
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return;
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}
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// Step 2.
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bool isSharedMemory;
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JS::Rooted<JSObject*> view(aCx, mView);
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JS::Rooted<JSObject*> arrayBuffer(
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aCx, JS_GetArrayBufferViewBuffer(aCx, view, &isSharedMemory));
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if (!arrayBuffer) {
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aRv.StealExceptionFromJSContext(aCx);
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return;
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}
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if (JS::IsDetachedArrayBufferObject(arrayBuffer)) {
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aRv.ThrowTypeError("View of Detached buffer");
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return;
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}
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// Step 3.
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MOZ_ASSERT(JS_GetArrayBufferViewByteLength(view) > 0);
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// Step 4.
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MOZ_ASSERT(JS::GetArrayBufferByteLength(arrayBuffer) > 0);
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// Step 5.
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RefPtr<ReadableByteStreamController> controller(mController);
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ReadableByteStreamControllerRespond(aCx, controller, bytesWritten, aRv);
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}
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// https://streams.spec.whatwg.org/#rs-byob-request-respond-with-new-view
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void ReadableStreamBYOBRequest::RespondWithNewView(JSContext* aCx,
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const ArrayBufferView& view,
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ErrorResult& aRv) {
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// Step 1.
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if (!mController) {
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aRv.ThrowTypeError("Undefined Controller");
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return;
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}
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// Step 2.
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bool isSharedMemory;
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JS::Rooted<JSObject*> rootedViewObj(aCx, view.Obj());
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JS::Rooted<JSObject*> viewedArrayBuffer(
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aCx, JS_GetArrayBufferViewBuffer(aCx, rootedViewObj, &isSharedMemory));
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if (!viewedArrayBuffer) {
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aRv.StealExceptionFromJSContext(aCx);
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return;
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}
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if (JS::IsDetachedArrayBufferObject(viewedArrayBuffer)) {
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aRv.ThrowTypeError("View of Detached Array Buffer");
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return;
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}
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// Step 3.
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RefPtr<ReadableByteStreamController> controller(mController);
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ReadableByteStreamControllerRespondWithNewView(aCx, controller, rootedViewObj,
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aRv);
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}
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void ReadableStreamBYOBRequest::SetController(
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ReadableByteStreamController* aController) {
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mController = aController;
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}
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} // namespace mozilla::dom
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