nsresult
SessionStorageCache::SetItem(DataSetType aDataSetType, const nsAString& aKey,
const nsAString& aValue, nsString& aOldValue)
{
int64_t delta = 0;
DataSet* dataSet = Set(aDataSetType);
if (!dataSet->mKeys.Get(aKey, &aOldValue)) {
SetDOMStringToNull(aOldValue);
// We only consider key size if the key doesn't exist before.
delta = static_cast<int64_t>(aKey.Length());
}
delta += static_cast<int64_t>(aValue.Length()) -
static_cast<int64_t>(aOldValue.Length());
if (aValue == aOldValue &&
DOMStringIsNull(aValue) == DOMStringIsNull(aOldValue)) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
if (!dataSet->ProcessUsageDelta(delta)) {
return NS_ERROR_DOM_QUOTA_REACHED;
}
dataSet->mKeys.Put(aKey, nsString(aValue));
return NS_OK;
}
void
SessionStorageCache::Clear(DataSetType aDataSetType, bool aByUserInteraction)
{
DataSet* dataSet = Set(aDataSetType);
dataSet->ProcessUsageDelta(-dataSet->mOriginQuotaUsage);
dataSet->mKeys.Clear();
if (!aByUserInteraction && aDataSetType == eSessionSetType) {
mSessionDataSetActive = false;
}
}
nsresult
SessionStorageCache::RemoveItem(DataSetType aDataSetType, const nsAString& aKey,
nsString& aOldValue)
{
DataSet* dataSet = Set(aDataSetType);
if (!dataSet->mKeys.Get(aKey, &aOldValue)) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
// Recalculate the cached data size
dataSet->ProcessUsageDelta(-(static_cast<int64_t>(aOldValue.Length()) +
static_cast<int64_t>(aKey.Length())));
dataSet->mKeys.Remove(aKey);
return NS_OK;
}
