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Bug 630883 Crash at [@ nsDOMWindowUtils::FindElementWithViewID] r=cjones a=blocking-fennec

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This commit is contained in:
Benjamin Stover 2011-02-02 13:35:03 -08:00
parent 366daa6594
commit ccc3bd7165
1 changed files with 6 additions and 1 deletions
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7
dom/base/nsDOMWindowUtils.cpp
View File

@ -998,17 +998,22 @@ nsDOMWindowUtils::FindElementWithViewId(nsViewID aID,
{
if (aID == FrameMetrics::ROOT_SCROLL_ID) {
nsPresContext* presContext = GetPresContext();
if (!presContext) {
return NS_ERROR_NOT_AVAILABLE;
}
nsIDocument* document = presContext->Document();
mozilla::dom::Element* rootElement = document->GetRootElement();
if (!rootElement) {
return NS_ERROR_NOT_AVAILABLE;
}
CallQueryInterface(rootElement, aResult);
return NS_OK;
}
nsRefPtr<nsIContent> content = nsLayoutUtils::FindContentFor(aID);
return CallQueryInterface(content, aResult);
return content ? CallQueryInterface(content, aResult) : NS_OK;
}
NS_IMETHODIMP