1 files changed, 90 insertions, 0 deletions
diff --git a/embedding/components/appstartup/nsAppStartupNotifier.cpp b/embedding/components/appstartup/nsAppStartupNotifier.cpp
new file mode 100644
index 0000000000..4ef38fb8d3
--- /dev/null
+++ b/embedding/components/appstartup/nsAppStartupNotifier.cpp
@@ -0,0 +1,90 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsXPIDLString.h"
+#include "nsIServiceManager.h"
+#include "nsICategoryManager.h"
+#include "nsXPCOM.h"
+#include "nsISupportsPrimitives.h"
+#include "nsAppStartupNotifier.h"
+#include "nsISimpleEnumerator.h"
+
+NS_IMPL_ISUPPORTS(nsAppStartupNotifier, nsIObserver)
+
+nsAppStartupNotifier::nsAppStartupNotifier()
+{
+}
+
+nsAppStartupNotifier::~nsAppStartupNotifier()
+{
+}
+
+NS_IMETHODIMP nsAppStartupNotifier::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *someData)
+{
+    NS_ENSURE_ARG(aTopic);
+    nsresult rv;
+
+    // now initialize all startup listeners
+    nsCOMPtr<nsICategoryManager> categoryManager =
+                    do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    nsCOMPtr<nsISimpleEnumerator> enumerator;
+    rv = categoryManager->EnumerateCategory(aTopic,
+                               getter_AddRefs(enumerator));
+    if (NS_FAILED(rv)) return rv;
+
+    nsCOMPtr<nsISupports> entry;
+    while (NS_SUCCEEDED(enumerator->GetNext(getter_AddRefs(entry)))) {
+        nsCOMPtr<nsISupportsCString> category = do_QueryInterface(entry, &rv);
+
+        if (NS_SUCCEEDED(rv)) {
+            nsAutoCString categoryEntry;
+            rv = category->GetData(categoryEntry);
+
+            nsXPIDLCString contractId;
+            categoryManager->GetCategoryEntry(aTopic, 
+                                              categoryEntry.get(),
+                                              getter_Copies(contractId));
+
+            if (NS_SUCCEEDED(rv)) {
+
+                // 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
+
+                nsCOMPtr<nsISupports> startupInstance;
+                if (Substring(contractId, 0, 8).EqualsLiteral("service,"))
+                    startupInstance = do_GetService(contractId.get() + 8, &rv);
+                else
+                    startupInstance = do_CreateInstance(contractId, &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, aTopic, 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;
+}