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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 "WorkerDocumentListener.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/dom/WorkerScope.h"
#include "nsGlobalWindowInner.h"
namespace mozilla::dom {
WorkerDocumentListener::WorkerDocumentListener()
: mMutex("mozilla::dom::WorkerDocumentListener::mMutex") {}
WorkerDocumentListener::~WorkerDocumentListener() = default;
RefPtr<WorkerDocumentListener> WorkerDocumentListener::Create(
WorkerPrivate* aWorkerPrivate) {
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
auto listener = MakeRefPtr<WorkerDocumentListener>();
RefPtr<StrongWorkerRef> strongWorkerRef =
StrongWorkerRef::Create(aWorkerPrivate, "WorkerDocumentListener",
[listener]() { listener->Destroy(); });
if (NS_WARN_IF(!strongWorkerRef)) {
return nullptr;
}
listener->mWorkerRef = new ThreadSafeWorkerRef(strongWorkerRef);
uint64_t windowID = aWorkerPrivate->WindowID();
aWorkerPrivate->DispatchToMainThread(NS_NewRunnableFunction(
"WorkerDocumentListener::Create",
[listener, windowID] { listener->SetListening(windowID, true); }));
return listener;
}
void WorkerDocumentListener::OnVisible(bool aVisible) {
MOZ_ASSERT(NS_IsMainThread());
MutexAutoLock lock(mMutex);
if (!mWorkerRef) {
// We haven't handled the runnable to release this yet.
return;
}
class VisibleRunnable final : public WorkerRunnable {
public:
VisibleRunnable(WorkerPrivate* aWorkerPrivate, bool aVisible)
: WorkerRunnable(aWorkerPrivate), mVisible(aVisible) {}
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) {
WorkerGlobalScope* scope = aWorkerPrivate->GlobalScope();
MOZ_ASSERT(scope);
scope->OnDocumentVisible(mVisible);
return true;
}
private:
const bool mVisible;
};
auto runnable = MakeRefPtr<VisibleRunnable>(mWorkerRef->Private(), aVisible);
runnable->Dispatch();
}
void WorkerDocumentListener::SetListening(uint64_t aWindowID, bool aListen) {
MOZ_ASSERT(NS_IsMainThread());
auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowID);
Document* doc = window->GetExtantDoc();
if (NS_WARN_IF(!doc)) {
// This would typically happen during shutdown if there is an active worker
// listening for document events. The Document may already be freed when we
// try to deregister for notifications.
return;
}
if (aListen) {
doc->AddWorkerDocumentListener(this);
} else {
doc->RemoveWorkerDocumentListener(this);
}
}
void WorkerDocumentListener::Destroy() {
MutexAutoLock lock(mMutex);
MOZ_ASSERT(mWorkerRef);
WorkerPrivate* workerPrivate = mWorkerRef->Private();
MOZ_ASSERT(workerPrivate);
workerPrivate->AssertIsOnWorkerThread();
uint64_t windowID = workerPrivate->WindowID();
workerPrivate->DispatchToMainThread(NS_NewRunnableFunction(
"WorkerDocumentListener::Destroy", [self = RefPtr{this}, windowID] {
self->SetListening(windowID, false);
}));
mWorkerRef = nullptr;
}
} // namespace mozilla::dom
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