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