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lightning-sunbird  0.9+nobinonly
nsAppStartupNotifier.cpp
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
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00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
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00037 
00038 #include "nsCOMPtr.h"
00039 #include "nsString.h"
00040 #include "nsXPIDLString.h"
00041 #include "nsIServiceManager.h"
00042 #include "nsICategoryManager.h"
00043 #include "nsXPCOM.h"
00044 #include "nsISupportsPrimitives.h"
00045 #include "nsAppStartupNotifier.h"
00046 
00047 NS_IMPL_ISUPPORTS1(nsAppStartupNotifier, nsIObserver)
00048 
00049 nsAppStartupNotifier::nsAppStartupNotifier()
00050 {
00051 }
00052 
00053 nsAppStartupNotifier::~nsAppStartupNotifier()
00054 {
00055 }
00056 
00057 NS_IMETHODIMP nsAppStartupNotifier::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData)
00058 {
00059     NS_ENSURE_ARG(aTopic);
00060     nsresult rv;
00061 
00062     // now initialize all startup listeners
00063     nsCOMPtr<nsICategoryManager> categoryManager =
00064                     do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
00065     NS_ENSURE_SUCCESS(rv, rv);
00066 
00067     nsCOMPtr<nsISimpleEnumerator> enumerator;
00068     rv = categoryManager->EnumerateCategory(aTopic,
00069                                getter_AddRefs(enumerator));
00070     if (NS_FAILED(rv)) return rv;
00071 
00072     nsCOMPtr<nsISupports> entry;
00073     while (NS_SUCCEEDED(enumerator->GetNext(getter_AddRefs(entry)))) {
00074         nsCOMPtr<nsISupportsCString> category = do_QueryInterface(entry, &rv);
00075 
00076         if (NS_SUCCEEDED(rv)) {
00077             nsCAutoString categoryEntry;
00078             rv = category->GetData(categoryEntry);
00079 
00080             nsXPIDLCString contractId;
00081             categoryManager->GetCategoryEntry(aTopic, 
00082                                               categoryEntry.get(),
00083                                               getter_Copies(contractId));
00084 
00085             if (NS_SUCCEEDED(rv)) {
00086 
00087                 // If we see the word "service," in the beginning
00088                 // of the contractId then we create it as a service
00089                 // if not we do a createInstance
00090 
00091                 const char *pServicePrefix = "service,";
00092                 
00093                 nsCAutoString cid(contractId);
00094                 PRInt32 serviceIdx = cid.Find(pServicePrefix);
00095 
00096                 nsCOMPtr<nsIObserver> startupObserver;
00097                 if (serviceIdx == 0)
00098                     startupObserver = do_GetService(cid.get() + strlen(pServicePrefix), &rv);
00099                 else
00100                     startupObserver = do_CreateInstance(contractId, &rv);
00101 
00102                 if (NS_SUCCEEDED(rv)) {
00103                     rv = startupObserver->Observe(nsnull, aTopic, nsnull);
00104  
00105                     // mainly for debugging if you want to know if your observer worked.
00106                     NS_ASSERTION(NS_SUCCEEDED(rv), "Startup Observer failed!\n");
00107                 }
00108                 else {
00109                   #ifdef NS_DEBUG
00110                     nsCAutoString warnStr("Cannot create startup observer : ");
00111                     warnStr += contractId.get();
00112                     NS_WARNING(warnStr.get());
00113                   #endif
00114                 }
00115             }
00116         }
00117     }
00118 
00119     return NS_OK;
00120 }