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Issue #2532 - Don't do PreventDefault for escape key if <select> dropdown is not shown

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We always use PreventDefault for <select> element, which is problematic if modal
dialog is on as it prevents cancelling the dialog. We fix it by not blocking the
default action if <select> is not shown.

See Bug 1649278
This commit is contained in:
Moonchild 2024-06-15 12:33:06 +02:00 • committed by roytam1
commit 368ee51d86
1 changed files with 11 additions and 2 deletions
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13
layout/forms/nsListControlFrame.cpp
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@ -2236,11 +2236,20 @@ nsListControlFrame::KeyDown(nsIDOMEvent* aKeyEvent)
return NS_OK;
}
// We don't want to preventDefault for escape key if the dropdown
// popup is not shown.
// Need to do the check before AboutToRollup because AboutToRollup
// may update the dropdown flags.
bool doPreventDefault =
!mComboboxFrame || mComboboxFrame->IsDroppedDownOrHasParentPopup();
AboutToRollup();
// If the select element is a dropdown style, Enter key should be
// If the select element is a dropdown style, Escape key should be
// consumed everytime since Escape key may be pressed accidentally after
// the dropdown is closed by Escepe key.
aKeyEvent->PreventDefault();
if (doPreventDefault) {
aKeyEvent->PreventDefault();
}
return NS_OK;
}
case NS_VK_PAGE_UP: {