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Add safety checks to ChildView's getScrollableView. Crash fix. b=493238 r=mstange a=dveditz

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git-svn-id: svn://10.0.0.236/trunk@258448 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
joshmoz%gmail.com 2009-09-22 01:28:52 +00:00
parent a1935cc6b9
commit 488a89e02f
1 changed files with 15 additions and 15 deletions
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30
mozilla/widget/src/cocoa/nsChildView.mm
View File

@ -2333,23 +2333,23 @@ NSEvent* gLastDragEvent = nil;
// we have to loop up through superviews in case the view that received the
// mouseDown is in fact a plugin view with no scrollbars
while (currView) {
// This is a hack I learned in nsView::GetViewFor(nsIWidget* aWidget)
// that I'm not sure is kosher. If anyone knows a better way to get
// the view for a widget, I'd love to hear it. --Nathan
void* clientData;
[currView widget]->GetClientData(clientData);
nsISupports* data = (nsISupports*)clientData;
nsCOMPtr<nsIInterfaceRequestor> req(do_QueryInterface(data));
if (req) {
req->GetInterface(NS_GET_IID(nsIScrollableView), (void**)&scrollableView);
if (scrollableView)
break;
nsIWidget* widget = [currView widget];
if (widget) {
void* clientData;
if (NS_SUCCEEDED(widget->GetClientData(clientData))) {
nsISupports* data = (nsISupports*)clientData;
nsCOMPtr<nsIInterfaceRequestor> req(do_QueryInterface(data));
if (req) {
req->GetInterface(NS_GET_IID(nsIScrollableView), (void**)&scrollableView);
if (scrollableView)
break;
}
}
}
if ([[currView superview] isMemberOfClass:[ChildView class]])
currView = (ChildView*)[currView superview];
NSView* superview = [currView superview];
if (superview && [superview isMemberOfClass:[ChildView class]])
currView = (ChildView*)superview;
else
currView = nil;
}