1 files changed, 145 insertions, 0 deletions
diff --git a/editor/libeditor/EditAggregateTransaction.cpp b/editor/libeditor/EditAggregateTransaction.cpp
new file mode 100644
index 000000000..f50e8a67c
--- /dev/null
+++ b/editor/libeditor/EditAggregateTransaction.cpp
@@ -0,0 +1,145 @@
+/* -*- 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