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Bug 1663513: Add a null check to an existing assertion to prevent possible crashes related to popups and mouse events on Windows. r=cmartin

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Differential Revision: https://phabricator.services.mozilla.com/D163515
This commit is contained in:
Stephen A Pohl 2022-12-05 14:45:59 +00:00
parent 2cb65518c0
commit 7984049da0
1 changed files with 12 additions and 10 deletions
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22
layout/xul/nsXULPopupManager.cpp
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@ -486,16 +486,18 @@ uint32_t nsXULPopupManager::GetSubmenuWidgetChain(
if (!item->IsNoAutoHide()) {
nsCOMPtr<nsIWidget> widget = item->Frame()->GetWidget();
NS_ASSERTION(widget, "open popup has no widget");
aWidgetChain->AppendElement(widget.get());
// In the case when a menulist inside a panel is open, clicking in the
// panel should still roll up the menu, so if a different type is found,
// stop scanning.
if (!sameTypeCount) {
count++;
if (!parent ||
item->Frame()->PopupType() != parent->Frame()->PopupType() ||
item->IsContextMenu() != parent->IsContextMenu()) {
sameTypeCount = count;
if (widget) {
aWidgetChain->AppendElement(widget.get());
// In the case when a menulist inside a panel is open, clicking in the
// panel should still roll up the menu, so if a different type is found,
// stop scanning.
if (!sameTypeCount) {
count++;
if (!parent ||
item->Frame()->PopupType() != parent->Frame()->PopupType() ||
item->IsContextMenu() != parent->IsContextMenu()) {
sameTypeCount = count;
}
}
}
}