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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/. */
#include "mozilla/dom/ReadableStreamDefaultController.h"
#include "mozilla/dom/UnderlyingSourceCallbackHelpers.h"
#include "mozilla/dom/UnderlyingSourceBinding.h"
namespace mozilla::dom {
// UnderlyingSourceAlgorithmsBase
NS_IMPL_CYCLE_COLLECTION(UnderlyingSourceAlgorithmsBase)
NS_IMPL_CYCLE_COLLECTING_ADDREF(UnderlyingSourceAlgorithmsBase)
NS_IMPL_CYCLE_COLLECTING_RELEASE(UnderlyingSourceAlgorithmsBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(UnderlyingSourceAlgorithmsBase)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_INHERITED_WITH_JS_MEMBERS(
UnderlyingSourceAlgorithms, UnderlyingSourceAlgorithmsBase,
(mGlobal, mStartCallback, mPullCallback, mCancelCallback),
(mUnderlyingSource))
NS_IMPL_ADDREF_INHERITED(UnderlyingSourceAlgorithms,
UnderlyingSourceAlgorithmsBase)
NS_IMPL_RELEASE_INHERITED(UnderlyingSourceAlgorithms,
UnderlyingSourceAlgorithmsBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(UnderlyingSourceAlgorithms)
NS_INTERFACE_MAP_END_INHERITING(UnderlyingSourceAlgorithmsBase)
// https://streams.spec.whatwg.org/#set-up-readable-stream-default-controller-from-underlying-source
void UnderlyingSourceAlgorithms::StartCallback(
JSContext* aCx, ReadableStreamController& aController,
JS::MutableHandle<JS::Value> aRetVal, ErrorResult& aRv) {
if (!mStartCallback) {
// Step 2: Let startAlgorithm be an algorithm that returns undefined.
aRetVal.setUndefined();
return;
}
// Step 5: If underlyingSourceDict["start"] exists, then set startAlgorithm to
// an algorithm which returns the result of invoking
// underlyingSourceDict["start"] with argument list « controller » and
// callback this value underlyingSource.
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSource);
ReadableStreamDefaultControllerOrReadableByteStreamController controller;
if (aController.IsDefault()) {
controller.SetAsReadableStreamDefaultController() = aController.AsDefault();
} else {
controller.SetAsReadableByteStreamController() = aController.AsByte();
}
return mStartCallback->Call(thisObj, controller, aRetVal, aRv,
"UnderlyingSource.start",
CallbackFunction::eRethrowExceptions);
}
// https://streams.spec.whatwg.org/#set-up-readable-stream-default-controller-from-underlying-source
already_AddRefed<Promise> UnderlyingSourceAlgorithms::PullCallback(
JSContext* aCx, ReadableStreamController& aController, ErrorResult& aRv) {
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSource);
if (!mPullCallback) {
// Step 3: Let pullAlgorithm be an algorithm that returns a promise resolved
// with undefined.
return Promise::CreateResolvedWithUndefined(mGlobal, aRv);
}
// Step 6: If underlyingSourceDict["pull"] exists, then set pullAlgorithm to
// an algorithm which returns the result of invoking
// underlyingSourceDict["pull"] with argument list « controller » and callback
// this value underlyingSource.
ReadableStreamDefaultControllerOrReadableByteStreamController controller;
if (aController.IsDefault()) {
controller.SetAsReadableStreamDefaultController() = aController.AsDefault();
} else {
controller.SetAsReadableByteStreamController() = aController.AsByte();
}
RefPtr<Promise> promise =
mPullCallback->Call(thisObj, controller, aRv, "UnderlyingSource.pull",
CallbackFunction::eRethrowExceptions);
return promise.forget();
}
// https://streams.spec.whatwg.org/#set-up-readable-stream-default-controller-from-underlying-source
already_AddRefed<Promise> UnderlyingSourceAlgorithms::CancelCallback(
JSContext* aCx, const Optional<JS::Handle<JS::Value>>& aReason,
ErrorResult& aRv) {
if (!mCancelCallback) {
// Step 4: Let cancelAlgorithm be an algorithm that returns a promise
// resolved with undefined.
return Promise::CreateResolvedWithUndefined(mGlobal, aRv);
}
// Step 7: If underlyingSourceDict["cancel"] exists, then set cancelAlgorithm
// to an algorithm which takes an argument reason and returns the result of
// invoking underlyingSourceDict["cancel"] with argument list « reason » and
// callback this value underlyingSource.
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSource);
RefPtr<Promise> promise =
mCancelCallback->Call(thisObj, aReason, aRv, "UnderlyingSource.cancel",
CallbackFunction::eRethrowExceptions);
return promise.forget();
}
} // namespace mozilla::dom
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