// nsIObserver interface
NS_IMETHODIMP
nsIOService::Observe(nsISupports *subject,
const char *topic,
const PRUnichar *data)
{
if (!strcmp(topic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
nsCOMPtr<nsIPrefBranch> prefBranch = do_QueryInterface(subject);
if (prefBranch)
PrefsChanged(prefBranch, NS_ConvertUTF16toUTF8(data).get());
}
else if (!strcmp(topic, kProfileChangeNetTeardownTopic)) {
if (!mOffline) {
SetOffline(true);
mOfflineForProfileChange = true;
}
}
else if (!strcmp(topic, kProfileChangeNetRestoreTopic)) {
if (mOfflineForProfileChange) {
mOfflineForProfileChange = false;
if (!mManageOfflineStatus ||
NS_FAILED(TrackNetworkLinkStatusForOffline())) {
SetOffline(false);
}
}
}
else if (!strcmp(topic, kProfileDoChange)) {
if (data && NS_LITERAL_STRING("startup").Equals(data)) {
// Lazy initialization of network link service (see bug 620472)
InitializeNetworkLinkService();
// Set up the initilization flag regardless the actuall result.
// If we fail here, we will fail always on.
mNetworkLinkServiceInitialized = true;
}
}
else if (!strcmp(topic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
// Remember we passed XPCOM shutdown notification to prevent any
// changes of the offline status from now. We must not allow going
// online after this point.
mShutdown = true;
SetOffline(true);
// Break circular reference.
mProxyService = nullptr;
}
else if (!strcmp(topic, NS_NETWORK_LINK_TOPIC)) {
if (!mOfflineForProfileChange && mManageOfflineStatus) {
TrackNetworkLinkStatusForOffline();
}
}
return NS_OK;
}
NS_IMETHODIMP
nsIOService::SetManageOfflineStatus(bool aManage) {
nsresult rv = NS_OK;
InitializeNetworkLinkService();
bool wasManaged = mManageOfflineStatus;
mManageOfflineStatus = aManage;
if (mManageOfflineStatus && !wasManaged) {
rv = TrackNetworkLinkStatusForOffline();
if (NS_FAILED(rv))
mManageOfflineStatus = false;
}
return rv;
}
nsresult
nsIOService::InitializeNetworkLinkService()
{
NS_TIME_FUNCTION;
nsresult rv = NS_OK;
if (mNetworkLinkServiceInitialized)
return rv;
if (!NS_IsMainThread()) {
NS_WARNING("Network link service should be created on main thread");
return NS_ERROR_FAILURE;
}
// go into managed mode if we can, and chrome process
if (XRE_GetProcessType() == GeckoProcessType_Default)
{
mNetworkLinkService = do_GetService(NS_NETWORK_LINK_SERVICE_CONTRACTID, &rv);
}
if (mNetworkLinkService) {
mNetworkLinkServiceInitialized = true;
}
else {
// We can't really determine if the machine has a usable network connection,
// so let's cross our fingers!
mManageOfflineStatus = false;
}
if (mManageOfflineStatus)
TrackNetworkLinkStatusForOffline();
else
SetOffline(false);
return rv;
}
NS_IMETHODIMP
nsIOService::SetManageOfflineStatus(bool aManage) {
nsresult rv = NS_OK;
// SetManageOfflineStatus must throw when we fail to go from non-managed
// to managed. Usually because there is no link monitoring service
// available. Failure to do this switch is detected by a failure of
// TrackNetworkLinkStatusForOffline(). When there is no network link
// available during call to InitializeNetworkLinkService(), application is
// put to offline mode. And when we change mMangeOfflineStatus to false
// on the next line we get stuck on being offline even though the link
// becomes later available.
bool wasManaged = mManageOfflineStatus;
mManageOfflineStatus = aManage;
InitializeNetworkLinkService();
if (mManageOfflineStatus && !wasManaged) {
rv = TrackNetworkLinkStatusForOffline();
if (NS_FAILED(rv))
mManageOfflineStatus = false;
}
return rv;
}