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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 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 "nsAppStartupNotifier.h"
#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsICategoryManager.h"
#include "nsIObserver.h"
#include "nsXPCOM.h"
#include "mozilla/SimpleEnumerator.h"
using namespace mozilla;
/* static */
nsresult nsAppStartupNotifier::NotifyObservers(const char* aCategory) {
NS_ENSURE_ARG(aCategory);
nsresult rv;
// now initialize all startup listeners
nsCOMPtr<nsICategoryManager> categoryManager =
do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsDependentCString category(aCategory);
nsCOMPtr<nsISimpleEnumerator> enumerator;
rv = categoryManager->EnumerateCategory(category, getter_AddRefs(enumerator));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
for (auto& categoryEntry : SimpleEnumerator<nsICategoryEntry>(enumerator)) {
nsAutoCString contractId;
categoryEntry->GetValue(contractId);
nsCOMPtr<nsISupports> startupInstance;
// If we see the word "service," in the beginning
// of the contractId then we create it as a service
// if not we do a createInstance
if (StringBeginsWith(contractId, "service,"_ns)) {
startupInstance = do_GetService(contractId.get() + 8, &rv);
} else {
startupInstance = do_CreateInstance(contractId.get(), &rv);
}
if (NS_SUCCEEDED(rv)) {
// Try to QI to nsIObserver
nsCOMPtr<nsIObserver> startupObserver =
do_QueryInterface(startupInstance, &rv);
if (NS_SUCCEEDED(rv)) {
rv = startupObserver->Observe(nullptr, aCategory, nullptr);
// mainly for debugging if you want to know if your observer worked.
NS_ASSERTION(NS_SUCCEEDED(rv), "Startup Observer failed!\n");
}
} else {
#ifdef DEBUG
nsAutoCString warnStr("Cannot create startup observer : ");
warnStr += contractId.get();
NS_WARNING(warnStr.get());
#endif
}
}
return NS_OK;
}
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