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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "EditAggregateTransaction.h"
#include "nsAString.h"
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsError.h" // for NS_OK, etc.
#include "nsISupportsUtils.h" // for NS_ADDREF
#include "nsITransaction.h" // for nsITransaction
#include "nsString.h" // for nsAutoString
namespace mozilla {
EditAggregateTransaction::EditAggregateTransaction()
{
}
EditAggregateTransaction::~EditAggregateTransaction()
{
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(EditAggregateTransaction,
EditTransactionBase,
mChildren)
NS_IMPL_ADDREF_INHERITED(EditAggregateTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(EditAggregateTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EditAggregateTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMETHODIMP
EditAggregateTransaction::DoTransaction()
{
// FYI: It's legal (but not very useful) to have an empty child list.
for (uint32_t i = 0, length = mChildren.Length(); i < length; ++i) {
nsITransaction *txn = mChildren[i];
if (!txn) {
return NS_ERROR_NULL_POINTER;
}
nsresult rv = txn->DoTransaction();
if (NS_FAILED(rv)) {
return rv;
}
}
return NS_OK;
}
NS_IMETHODIMP
EditAggregateTransaction::UndoTransaction()
{
// FYI: It's legal (but not very useful) to have an empty child list.
// Undo goes through children backwards.
for (uint32_t i = mChildren.Length(); i--; ) {
nsITransaction *txn = mChildren[i];
if (!txn) {
return NS_ERROR_NULL_POINTER;
}
nsresult rv = txn->UndoTransaction();
if (NS_FAILED(rv)) {
return rv;
}
}
return NS_OK;
}
NS_IMETHODIMP
EditAggregateTransaction::RedoTransaction()
{
// It's legal (but not very useful) to have an empty child list.
for (uint32_t i = 0, length = mChildren.Length(); i < length; ++i) {
nsITransaction *txn = mChildren[i];
if (!txn) {
return NS_ERROR_NULL_POINTER;
}
nsresult rv = txn->RedoTransaction();
if (NS_FAILED(rv)) {
return rv;
}
}
return NS_OK;
}
NS_IMETHODIMP
EditAggregateTransaction::Merge(nsITransaction* aTransaction,
bool* aDidMerge)
{
if (aDidMerge) {
*aDidMerge = false;
}
if (mChildren.IsEmpty()) {
return NS_OK;
}
// FIXME: Is this really intended not to loop? It looks like the code
// that used to be here sort of intended to loop, but didn't.
nsITransaction *txn = mChildren[0];
if (!txn) {
return NS_ERROR_NULL_POINTER;
}
return txn->Merge(aTransaction, aDidMerge);
}
NS_IMETHODIMP
EditAggregateTransaction::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("EditAggregateTransaction: ");
if (mName) {
nsAutoString name;
mName->ToString(name);
aString += name;
}
return NS_OK;
}
NS_IMETHODIMP
EditAggregateTransaction::AppendChild(EditTransactionBase* aTransaction)
{
if (!aTransaction) {
return NS_ERROR_NULL_POINTER;
}
RefPtr<EditTransactionBase>* slot = mChildren.AppendElement();
if (!slot) {
return NS_ERROR_OUT_OF_MEMORY;
}
*slot = aTransaction;
return NS_OK;
}
NS_IMETHODIMP
EditAggregateTransaction::GetName(nsIAtom** aName)
{
if (aName && mName) {
*aName = mName;
NS_ADDREF(*aName);
return NS_OK;
}
return NS_ERROR_NULL_POINTER;
}
} // namespace mozilla
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