Added several checks to ensure we have a valid server or destination. Fixes bug #727, and also prevents several other segfault situations.

1 files changed, 33 insertions, 3 deletions

diff --git a/noncore/settings/aqpkg/settingsimpl.cpp b/noncore/settings/aqpkg/settingsimpl.cpp
index 9f611da..e2afada 100644
--- a/noncore/settings/aqpkg/settingsimpl.cpp
+++ b/noncore/settings/aqpkg/settingsimpl.cpp
@@ -241,211 +241,241 @@ QWidget *SettingsImpl :: initProxyTab()
 
     label = new QLabel( tr( "Password:" ), container );
     layout->addWidget( label, 3, 0 );
     txtPassword = new QLineEdit( container );
     layout->addWidget( txtPassword, 3, 1 );
 
     QPushButton *btn = new QPushButton( Resource::loadPixmap( "edit" ), tr( "Update" ), container );
     connect( btn, SIGNAL( clicked() ), this, SLOT( proxyApplyChanges() ) );
     layout->addMultiCellWidget( btn, 4, 4, 0, 1 );
     
     return control;
 }
 
 void SettingsImpl :: setupData()
 {
     // add servers
     QString serverName;
     QListIterator<Server> it( dataMgr->getServerList() );
     for ( ; it.current(); ++it )
 	{
         serverName = it.current()->getServerName();
         if ( serverName == LOCAL_SERVER || serverName == LOCAL_IPKGS )
             continue;
 
         servers->insertItem( serverName );
 	}
 
 
     // add destinations
     QListIterator<Destination> it2( dataMgr->getDestinationList() );
     for ( ; it2.current(); ++it2 )
         destinations->insertItem( it2.current()->getDestinationName() );
     
     // setup proxy tab
     txtHttpProxy->setText( dataMgr->getHttpProxy() );
     txtFtpProxy->setText( dataMgr->getFtpProxy() );
     txtUsername->setText( dataMgr->getProxyUsername() );
     txtPassword->setText( dataMgr->getProxyPassword() );
     chkHttpProxyEnabled->setChecked( dataMgr->getHttpProxyEnabled() );
     chkFtpProxyEnabled->setChecked( dataMgr->getFtpProxyEnabled() );
 }
 
 //------------------ Servers tab ----------------------
 
 void SettingsImpl :: editServer( int sel )
 {
     currentSelectedServer = sel;
     Server *s = dataMgr->getServer( servers->currentText() );
+    if ( s )
+    {
     serverName = s->getServerName();
     servername->setText( s->getServerName() );
     serverurl->setText( s->getServerUrl() );
     active->setChecked( s->isServerActive() );
 }
+    else
+    {
+        serverName = "";
+        servername->setText( "" );
+        serverurl->setText( "" );
+        active->setChecked( false );
+    }
+}
 
 void SettingsImpl :: newServer()
 {
     newserver = true;
     servername->setText( "" );
     serverurl->setText( "" );
     servername->setFocus();
     active->setChecked( true );
 }
 
 void SettingsImpl :: removeServer()
 {
     changed = true;
     Server *s = dataMgr->getServer( servers->currentText() );
+    if ( s )
+    {
     dataMgr->getServerList().removeRef( s );
     servers->removeItem( currentSelectedServer );
 }
+}
 
 void SettingsImpl :: changeServerDetails()
 {
 	changed = true;
 
 	QString newName = servername->text();
 	
 	// Convert any spaces to underscores
 	char *tmpStr = new char[newName.length() + 1];
 	for ( unsigned int i = 0 ; i < newName.length() ; ++i )
 	{
 		if ( newName[i] == ' ' )
 			tmpStr[i] = '_';
 		else
 			tmpStr[i] = newName[i].latin1();
 	}
 	tmpStr[newName.length()] = '\0';
 	
 	newName = tmpStr;
 	delete tmpStr;
 	
 	if ( !newserver )
 	{
 		Server *s = dataMgr->getServer( servers->currentText() );
-
+		if ( s )
+		{
 		// Update url
 		s->setServerUrl( serverurl->text() );
         s->setActive( active->isChecked() );
 
-
 		// Check if server name has changed, if it has then we need to replace the key in the map
 		if ( serverName != newName )
 		{
 			// Update server name
 			s->setServerName( newName );
 		}
 		
 		// Update list box
 		servers->changeItem( newName, currentSelectedServer );
 	}
+	}
 	else
 	{
         Server s( newName, serverurl->text() );
         dataMgr->getServerList().append( new Server( newName, serverurl->text() ) );
         dataMgr->getServerList().last()->setActive( active->isChecked() );
 		servers->insertItem( newName );
 		servers->setCurrentItem( servers->count() );
 		newserver = false;
 	}
 }
 
 //------------------ Destinations tab ----------------------
 
 void SettingsImpl :: editDestination( int sel )
 {
 	currentSelectedDestination = sel;
     Destination *d = dataMgr->getDestination( destinations->currentText() );
+    if ( d )
+    {
     destinationName = d->getDestinationName();
     destinationname->setText( d->getDestinationName() );
     destinationurl->setText( d->getDestinationPath() );
     linkToRoot->setChecked( d->linkToRoot() );
 }
+    else
+    {
+        destinationName = "";
+        destinationname->setText( "" );
+        destinationurl->setText( "" );
+        linkToRoot->setChecked( false );
+    }
+}
 
 void SettingsImpl :: newDestination()
 {
 	newdestination = true;
 	destinationname->setText( "" );
 	destinationurl->setText( "" );
 	destinationname->setFocus();
     linkToRoot->setChecked( true );
 }
 
 void SettingsImpl :: removeDestination()
 {
     changed = true;
     Destination *d = dataMgr->getDestination( destinations->currentText() );
+    if ( d )
+    {
     dataMgr->getDestinationList().removeRef( d );
 	destinations->removeItem( currentSelectedDestination );
 }
+}
 
 void SettingsImpl :: changeDestinationDetails()
 {
 	changed = true;
 
 #ifdef QWS
     Config cfg( "aqpkg" );
     cfg.setGroup( "destinations" );
 #endif
 
     QString newName = destinationname->text();
 	if ( !newdestination )
 	{
 		Destination *d = dataMgr->getDestination( destinations->currentText() );
-
+		if ( d )
+		{
 		// Update url
 		d->setDestinationPath( destinationurl->text() );
         d->linkToRoot( linkToRoot->isChecked() );
 
 		// Check if server name has changed, if it has then we need to replace the key in the map
 		if ( destinationName != newName )
 		{
 			// Update server name
 			d->setDestinationName( newName );
 
 			// Update list box
 			destinations->changeItem( newName, currentSelectedDestination );
 		}
+
 #ifdef QWS
         QString key = newName;
         key += "_linkToRoot";
         int val = d->linkToRoot();
         cfg.writeEntry( key, val );
 #endif        
 	}
+	}
 	else
 	{
 		dataMgr->getDestinationList().append( new Destination( newName, destinationurl->text() ) );
 		destinations->insertItem( newName );
 		destinations->setCurrentItem( destinations->count() );
 		newdestination = false;
 
 #ifdef QWS
         QString key = newName;
         key += "_linkToRoot";
         cfg.writeEntry( key, true );
 #endif
 	}
 }
 
 //------------------ Proxy tab ----------------------
 void SettingsImpl :: proxyApplyChanges()
 {
     changed = true;
     dataMgr->setHttpProxy( txtHttpProxy->text() );
     dataMgr->setFtpProxy( txtFtpProxy->text() );
     dataMgr->setProxyUsername( txtUsername->text() );
     dataMgr->setProxyPassword( txtPassword->text() );
 
     dataMgr->setHttpProxyEnabled( chkHttpProxyEnabled->isChecked() );
     dataMgr->setFtpProxyEnabled( chkFtpProxyEnabled->isChecked() );
 }