зеркало из https://github.com/mozilla/gecko-dev.git
68 строки
2.1 KiB
C++
68 строки
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsComponentManagerUtils.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsICategoryManager.h"
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#include "nsXPCOM.h"
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#include "nsAppStartupNotifier.h"
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#include "mozilla/SimpleEnumerator.h"
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/* static */
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nsresult nsAppStartupNotifier::NotifyObservers(const char* aCategory) {
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NS_ENSURE_ARG(aCategory);
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nsresult rv;
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// now initialize all startup listeners
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nsCOMPtr<nsICategoryManager> categoryManager =
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do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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nsDependentCString category(aCategory);
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nsCOMPtr<nsISimpleEnumerator> enumerator;
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rv = categoryManager->EnumerateCategory(category, getter_AddRefs(enumerator));
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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for (auto& categoryEntry : SimpleEnumerator<nsICategoryEntry>(enumerator)) {
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nsAutoCString contractId;
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categoryEntry->GetValue(contractId);
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nsCOMPtr<nsISupports> startupInstance;
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// If we see the word "service," in the beginning
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// of the contractId then we create it as a service
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// if not we do a createInstance
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if (StringBeginsWith(contractId, "service,"_ns)) {
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startupInstance = do_GetService(contractId.get() + 8, &rv);
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} else {
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startupInstance = do_CreateInstance(contractId.get(), &rv);
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}
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if (NS_SUCCEEDED(rv)) {
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// Try to QI to nsIObserver
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nsCOMPtr<nsIObserver> startupObserver =
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do_QueryInterface(startupInstance, &rv);
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if (NS_SUCCEEDED(rv)) {
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rv = startupObserver->Observe(nullptr, aCategory, nullptr);
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// mainly for debugging if you want to know if your observer worked.
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NS_ASSERTION(NS_SUCCEEDED(rv), "Startup Observer failed!\n");
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}
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} else {
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#ifdef DEBUG
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nsAutoCString warnStr("Cannot create startup observer : ");
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warnStr += contractId.get();
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NS_WARNING(warnStr.get());
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#endif
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}
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}
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return NS_OK;
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}
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