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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 "mozilla/dom/ReportingObserver.h"
#include "mozilla/dom/Report.h"
#include "mozilla/dom/ReportingBinding.h"
#include "nsContentUtils.h"
#include "nsIGlobalObject.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(ReportingObserver)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ReportingObserver)
tmp->Disconnect();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mReports)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobal)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCallback)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ReportingObserver)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReports)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobal)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCallback)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(ReportingObserver)
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(ReportingObserver, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(ReportingObserver, Release)
/* static */
already_AddRefed<ReportingObserver> ReportingObserver::Constructor(
const GlobalObject& aGlobal, ReportingObserverCallback& aCallback,
const ReportingObserverOptions& aOptions, ErrorResult& aRv) {
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
MOZ_ASSERT(global);
nsTArray<nsString> types;
if (aOptions.mTypes.WasPassed()) {
types = aOptions.mTypes.Value();
}
RefPtr<ReportingObserver> ro =
new ReportingObserver(global, aCallback, types, aOptions.mBuffered);
return ro.forget();
}
ReportingObserver::ReportingObserver(nsIGlobalObject* aGlobal,
ReportingObserverCallback& aCallback,
const nsTArray<nsString>& aTypes,
bool aBuffered)
: mGlobal(aGlobal),
mCallback(&aCallback),
mTypes(aTypes.Clone()),
mBuffered(aBuffered) {
MOZ_ASSERT(aGlobal);
}
ReportingObserver::~ReportingObserver() { Disconnect(); }
JSObject* ReportingObserver::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return ReportingObserver_Binding::Wrap(aCx, this, aGivenProto);
}
void ReportingObserver::Observe() {
mGlobal->RegisterReportingObserver(this, mBuffered);
}
void ReportingObserver::Disconnect() {
if (mGlobal) {
mGlobal->UnregisterReportingObserver(this);
}
}
void ReportingObserver::TakeRecords(nsTArray<RefPtr<Report>>& aRecords) {
mReports.SwapElements(aRecords);
}
namespace {
class ReportRunnable final : public DiscardableRunnable {
public:
explicit ReportRunnable(nsIGlobalObject* aGlobal)
: DiscardableRunnable("ReportRunnable"), mGlobal(aGlobal) {}
// MOZ_CAN_RUN_SCRIPT_BOUNDARY until Runnable::Run is MOZ_CAN_RUN_SCRIPT. See
// bug 1535398.
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
MOZ_KnownLive(mGlobal)->NotifyReportingObservers();
return NS_OK;
}
private:
const nsCOMPtr<nsIGlobalObject> mGlobal;
};
} // namespace
void ReportingObserver::MaybeReport(Report* aReport) {
MOZ_ASSERT(aReport);
if (!mTypes.IsEmpty()) {
nsAutoString type;
aReport->GetType(type);
if (!mTypes.Contains(type)) {
return;
}
}
bool wasEmpty = mReports.IsEmpty();
RefPtr<Report> report = aReport->Clone();
MOZ_ASSERT(report);
if (NS_WARN_IF(!mReports.AppendElement(report, fallible))) {
return;
}
if (!wasEmpty) {
return;
}
RefPtr<ReportRunnable> r = new ReportRunnable(mGlobal);
NS_DispatchToCurrentThread(r);
}
void ReportingObserver::MaybeNotify() {
if (mReports.IsEmpty()) {
return;
}
// Let's take the ownership of the reports.
nsTArray<RefPtr<Report>> list = std::move(mReports);
Sequence<OwningNonNull<Report>> reports;
for (Report* report : list) {
if (NS_WARN_IF(!reports.AppendElement(*report, fallible))) {
return;
}
}
// We should report if this throws exception. But where?
RefPtr<ReportingObserverCallback> callback(mCallback);
callback->Call(reports, *this);
}
void ReportingObserver::ForgetReports() { mReports.Clear(); }
} // namespace dom
} // namespace mozilla
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