NS_IMETHODIMP
HTMLOptionsCollection::SetOption(uint32_t aIndex,
nsIDOMHTMLOptionElement* aOption)
{
if (!mSelect) {
return NS_OK;
}
// if the new option is null, just remove this option. Note that it's safe
// to pass a too-large aIndex in here.
if (!aOption) {
mSelect->Remove(aIndex);
// We're done.
return NS_OK;
}
nsresult rv = NS_OK;
uint32_t index = uint32_t(aIndex);
// Now we're going to be setting an option in our collection
if (index > mElements.Length()) {
// Fill our array with blank options up to (but not including, since we're
// about to change it) aIndex, for compat with other browsers.
rv = SetLength(index);
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(index <= mElements.Length(), "SetLength lied");
nsCOMPtr<nsIDOMNode> ret;
if (index == mElements.Length()) {
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aOption);
rv = mSelect->AppendChild(node, getter_AddRefs(ret));
} else {
// Find the option they're talking about and replace it
// hold a strong reference to follow COM rules.
nsRefPtr<HTMLOptionElement> refChild = ItemAsOption(index);
NS_ENSURE_TRUE(refChild, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsINode> parent = refChild->GetParent();
if (parent) {
nsCOMPtr<nsINode> node = do_QueryInterface(aOption);
ErrorResult res;
parent->ReplaceChild(*node, *refChild, res);
rv = res.ErrorCode();
}
}
return rv;
}
void
HTMLOptionsCollection::IndexedSetter(uint32_t aIndex,
HTMLOptionElement* aOption,
ErrorResult& aError)
{
if (!mSelect) {
return;
}
// if the new option is null, just remove this option. Note that it's safe
// to pass a too-large aIndex in here.
if (!aOption) {
mSelect->Remove(aIndex);
// We're done.
return;
}
// Now we're going to be setting an option in our collection
if (aIndex > mElements.Length()) {
// Fill our array with blank options up to (but not including, since we're
// about to change it) aIndex, for compat with other browsers.
nsresult rv = SetLength(aIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
aError.Throw(rv);
return;
}
}
NS_ASSERTION(aIndex <= mElements.Length(), "SetLength lied");
if (aIndex == mElements.Length()) {
mSelect->AppendChild(*aOption, aError);
return;
}
// Find the option they're talking about and replace it
// hold a strong reference to follow COM rules.
RefPtr<HTMLOptionElement> refChild = ItemAsOption(aIndex);
if (!refChild) {
aError.Throw(NS_ERROR_UNEXPECTED);
return;
}
nsCOMPtr<nsINode> parent = refChild->GetParent();
if (!parent) {
return;
}
parent->ReplaceChild(*aOption, *refChild, aError);
}
Element*
HTMLOptionsCollection::GetElementAt(uint32_t aIndex)
{
return ItemAsOption(aIndex);
}
