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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* 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 "WebTaskController.h"
#include "TaskSignal.h"
#include "mozilla/dom/TaskPriorityChangeEvent.h"
namespace mozilla::dom {
WebTaskController::WebTaskController(nsIGlobalObject* aGlobal,
TaskPriority aPriority)
: AbortController(aGlobal) {
MOZ_ASSERT(!mSignal);
mSignal = TaskSignal::Create(aGlobal, aPriority);
}
void WebTaskController::SignalPriorityChange(TaskSignal* aTaskSignal,
TaskPriority aPriority,
ErrorResult& aRv) {
RefPtr<TaskSignal> taskSignal = aTaskSignal;
MOZ_ASSERT(taskSignal);
if (taskSignal->PriorityChanging()) {
aRv.ThrowNotAllowedError("Signal's priority changing is true");
return;
}
if (taskSignal->Priority() == aPriority) {
return;
}
taskSignal->SetPriorityChanging(true);
TaskPriority previousPriority = taskSignal->Priority();
taskSignal->SetPriority(aPriority);
taskSignal->RunPriorityChangeAlgorithms();
TaskPriorityChangeEventInit init;
init.mPreviousPriority = previousPriority;
RefPtr<TaskPriorityChangeEvent> event = TaskPriorityChangeEvent::Constructor(
taskSignal, u"prioritychange"_ns, init);
event->SetTrusted(true);
taskSignal->DispatchEvent(*event);
for (const RefPtr<TaskSignal>& dependentSignal :
taskSignal->DependentTaskSignals().Clone()) {
SignalPriorityChange(dependentSignal, aPriority, aRv);
}
taskSignal->SetPriorityChanging(false);
}
void WebTaskController::SetPriority(TaskPriority aPriority, ErrorResult& aRv) {
MOZ_ASSERT(mSignal->IsTaskSignal());
// mSignal for WebTaskController should always be a TaskSignal.
SignalPriorityChange(static_cast<TaskSignal*>(mSignal.get()), aPriority, aRv);
}
already_AddRefed<WebTaskController> WebTaskController::Constructor(
const GlobalObject& aGlobal, const TaskControllerInit& aInit,
ErrorResult& aRv) {
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
if (!global) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
RefPtr<WebTaskController> webTaskController =
new WebTaskController(global, aInit.mPriority);
return webTaskController.forget();
}
JSObject* WebTaskController::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return TaskController_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom
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