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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "AbortSignal.h"
#include "AbortController.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/AbortSignalBinding.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(AbortSignal)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(AbortSignal,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mController)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(AbortSignal,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mController)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(AbortSignal)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(AbortSignal, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(AbortSignal, DOMEventTargetHelper)
AbortSignal::AbortSignal(AbortController* aController,
bool aAborted)
: DOMEventTargetHelper(aController->GetParentObject())
, mController(aController)
, mAborted(aAborted)
{}
AbortSignal::AbortSignal(bool aAborted)
: mAborted(aAborted)
{}
JSObject*
AbortSignal::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return AbortSignalBinding::Wrap(aCx, this, aGivenProto);
}
bool
AbortSignal::Aborted() const
{
return mAborted;
}
void
AbortSignal::Abort()
{
MOZ_ASSERT(!mAborted);
mAborted = true;
// Let's inform the followers.
for (uint32_t i = 0; i < mFollowers.Length(); ++i) {
mFollowers[i]->Aborted();
}
EventInit init;
init.mBubbles = false;
init.mCancelable = false;
// TODO which kind of event should we dispatch here?
RefPtr<Event> event =
Event::Constructor(this, NS_LITERAL_STRING("abort"), init);
event->SetTrusted(true);
bool dummy;
DispatchEvent(event, &dummy);
}
void
AbortSignal::AddFollower(AbortSignal::Follower* aFollower)
{
MOZ_DIAGNOSTIC_ASSERT(aFollower);
if (!mFollowers.Contains(aFollower)) {
mFollowers.AppendElement(aFollower);
}
}
void
AbortSignal::RemoveFollower(AbortSignal::Follower* aFollower)
{
MOZ_DIAGNOSTIC_ASSERT(aFollower);
mFollowers.RemoveElement(aFollower);
}
bool
AbortSignal::CanAcceptFollower(AbortSignal::Follower* aFollower) const
{
MOZ_DIAGNOSTIC_ASSERT(aFollower);
if (!mController) {
return true;
}
if (aFollower == mController) {
return false;
}
AbortSignal* following = mController->Following();
if (!following) {
return true;
}
return following->CanAcceptFollower(aFollower);
}
// AbortSignal::Follower
// ----------------------------------------------------------------------------
AbortSignal::Follower::~Follower()
{
Unfollow();
}
void
AbortSignal::Follower::Follow(AbortSignal* aSignal)
{
MOZ_DIAGNOSTIC_ASSERT(aSignal);
if (!aSignal->CanAcceptFollower(this)) {
return;
}
Unfollow();
mFollowingSignal = aSignal;
aSignal->AddFollower(this);
}
void
AbortSignal::Follower::Unfollow()
{
if (mFollowingSignal) {
mFollowingSignal->RemoveFollower(this);
mFollowingSignal = nullptr;
}
}
} // dom namespace
} // mozilla namespace
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