gecko-dev/dom/abort/AbortSignal.cpp

116 строки
3.2 KiB
C++

/* -*- 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 "mozilla/dom/Event.h"
#include "mozilla/dom/AbortSignalBinding.h"
namespace mozilla {
namespace dom {
// AbortSignalImpl
// ----------------------------------------------------------------------------
AbortSignalImpl::AbortSignalImpl(bool aAborted) : mAborted(aAborted) {}
bool AbortSignalImpl::Aborted() const { return mAborted; }
void AbortSignalImpl::Abort() {
if (mAborted) {
return;
}
mAborted = true;
// Let's inform the followers.
nsTObserverArray<AbortFollower*>::ForwardIterator iter(mFollowers);
while (iter.HasMore()) {
iter.GetNext()->Abort();
}
}
void AbortSignalImpl::AddFollower(AbortFollower* aFollower) {
MOZ_DIAGNOSTIC_ASSERT(aFollower);
if (!mFollowers.Contains(aFollower)) {
mFollowers.AppendElement(aFollower);
}
}
void AbortSignalImpl::RemoveFollower(AbortFollower* aFollower) {
MOZ_DIAGNOSTIC_ASSERT(aFollower);
mFollowers.RemoveElement(aFollower);
}
// AbortSignal
// ----------------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_CLASS(AbortSignal)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(AbortSignal,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFollowingSignal)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(AbortSignal,
DOMEventTargetHelper)
tmp->Unfollow();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AbortSignal)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(AbortSignal, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(AbortSignal, DOMEventTargetHelper)
AbortSignal::AbortSignal(nsIGlobalObject* aGlobalObject, bool aAborted)
: DOMEventTargetHelper(aGlobalObject), AbortSignalImpl(aAborted) {}
JSObject* AbortSignal::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return AbortSignal_Binding::Wrap(aCx, this, aGivenProto);
}
void AbortSignal::Abort() {
AbortSignalImpl::Abort();
EventInit init;
init.mBubbles = false;
init.mCancelable = false;
RefPtr<Event> event =
Event::Constructor(this, NS_LITERAL_STRING("abort"), init);
event->SetTrusted(true);
DispatchEvent(*event);
}
// AbortFollower
// ----------------------------------------------------------------------------
AbortFollower::~AbortFollower() { Unfollow(); }
void AbortFollower::Follow(AbortSignalImpl* aSignal) {
MOZ_DIAGNOSTIC_ASSERT(aSignal);
Unfollow();
mFollowingSignal = aSignal;
aSignal->AddFollower(this);
}
void AbortFollower::Unfollow() {
if (mFollowingSignal) {
mFollowingSignal->RemoveFollower(this);
mFollowingSignal = nullptr;
}
}
bool AbortFollower::IsFollowing() const { return !!mFollowingSignal; }
} // namespace dom
} // namespace mozilla