nsresult
HTMLFieldSetElement::InsertChildAt(nsIContent* aChild, uint32_t aIndex,
bool aNotify)
{
bool firstLegendHasChanged = false;
if (aChild->IsHTMLElement(nsGkAtoms::legend)) {
if (!mFirstLegend) {
mFirstLegend = aChild;
// We do not want to notify the first time mFirstElement is set.
} else {
// If mFirstLegend is before aIndex, we do not change it.
// Otherwise, mFirstLegend is now aChild.
if (int32_t(aIndex) <= IndexOf(mFirstLegend)) {
mFirstLegend = aChild;
firstLegendHasChanged = true;
}
}
}
nsresult rv = nsGenericHTMLFormElement::InsertChildAt(aChild, aIndex, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (firstLegendHasChanged) {
NotifyElementsForFirstLegendChange(aNotify);
}
return rv;
}
void
HTMLFieldSetElement::RemoveChildAt(uint32_t aIndex, bool aNotify)
{
bool firstLegendHasChanged = false;
if (mFirstLegend && (GetChildAt(aIndex) == mFirstLegend)) {
// If we are removing the first legend we have to found another one.
nsIContent* child = mFirstLegend->GetNextSibling();
mFirstLegend = nullptr;
firstLegendHasChanged = true;
for (; child; child = child->GetNextSibling()) {
if (child->IsHTMLElement(nsGkAtoms::legend)) {
mFirstLegend = child;
break;
}
}
}
nsGenericHTMLFormElement::RemoveChildAt(aIndex, aNotify);
if (firstLegendHasChanged) {
NotifyElementsForFirstLegendChange(aNotify);
}
}
nsresult
nsHTMLFieldSetElement::RemoveChildAt(PRUint32 aIndex, PRBool aNotify)
{
bool firstLegendHasChanged = false;
if (mFirstLegend && (GetChildAt(aIndex) == mFirstLegend)) {
// If we are removing the first legend we have to found another one.
nsIContent* child = mFirstLegend->GetNextSibling();
mFirstLegend = nsnull;
firstLegendHasChanged = true;
for (; child; child = child->GetNextSibling()) {
if (child->IsHTML(nsGkAtoms::legend)) {
mFirstLegend = child;
break;
}
}
}
nsresult rv = nsGenericHTMLFormElement::RemoveChildAt(aIndex, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (firstLegendHasChanged) {
NotifyElementsForFirstLegendChange(aNotify);
}
return rv;
}
