1 files changed, 124 insertions, 0 deletions
diff --git a/editor/libeditor/EditAggregateTransaction.cpp b/editor/libeditor/EditAggregateTransaction.cpp
new file mode 100644
index 0000000000..d5be20ac00
--- /dev/null
+++ b/editor/libeditor/EditAggregateTransaction.cpp
@@ -0,0 +1,124 @@
+/* -*- 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 "mozilla/Logging.h"
+#include "mozilla/ReverseIterator.h"  // for Reversed
+#include "nsAString.h"
+#include "nsAtom.h"
+#include "nsCOMPtr.h"  // for nsCOMPtr
+#include "nsError.h"   // for NS_OK, etc.
+#include "nsGkAtoms.h"
+#include "nsISupportsUtils.h"  // for NS_ADDREF
+#include "nsString.h"          // for nsAutoString
+
+namespace mozilla {
+
+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() {
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p EditAggregateTransaction::%s this={ mName=%s, mChildren=%zu } "
+           "Start==============================",
+           this, __FUNCTION__,
+           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get(),
+           mChildren.Length()));
+  // FYI: It's legal (but not very useful) to have an empty child list.
+  for (const OwningNonNull<EditTransactionBase>& childTransaction :
+       CopyableAutoTArray<OwningNonNull<EditTransactionBase>, 10>(mChildren)) {
+    nsresult rv = MOZ_KnownLive(childTransaction)->DoTransaction();
+    if (NS_FAILED(rv)) {
+      NS_WARNING("EditTransactionBase::DoTransaction() failed");
+      return rv;
+    }
+  }
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p EditAggregateTransaction::%s this={ mName=%s } "
+           "End================================",
+           this, __FUNCTION__,
+           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP EditAggregateTransaction::UndoTransaction() {
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p EditAggregateTransaction::%s this={ mName=%s, mChildren=%zu } "
+           "Start==============================",
+           this, __FUNCTION__,
+           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get(),
+           mChildren.Length()));
+  // FYI: It's legal (but not very useful) to have an empty child list.
+  // Undo goes through children backwards.
+  const CopyableAutoTArray<OwningNonNull<EditTransactionBase>, 10> children(
+      mChildren);
+  for (const OwningNonNull<EditTransactionBase>& childTransaction :
+       Reversed(children)) {
+    nsresult rv = MOZ_KnownLive(childTransaction)->UndoTransaction();
+    if (NS_FAILED(rv)) {
+      NS_WARNING("EditTransactionBase::UndoTransaction() failed");
+      return rv;
+    }
+  }
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p EditAggregateTransaction::%s this={ mName=%s } "
+           "End================================",
+           this, __FUNCTION__,
+           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP EditAggregateTransaction::RedoTransaction() {
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p EditAggregateTransaction::%s this={ mName=%s, mChildren=%zu } "
+           "Start==============================",
+           this, __FUNCTION__,
+           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get(),
+           mChildren.Length()));
+  // It's legal (but not very useful) to have an empty child list.
+  const CopyableAutoTArray<OwningNonNull<EditTransactionBase>, 10> children(
+      mChildren);
+  for (const OwningNonNull<EditTransactionBase>& childTransaction : children) {
+    nsresult rv = MOZ_KnownLive(childTransaction)->RedoTransaction();
+    if (NS_FAILED(rv)) {
+      NS_WARNING("EditTransactionBase::RedoTransaction() failed");
+      return rv;
+    }
+  }
+  MOZ_LOG(GetLogModule(), LogLevel::Info,
+          ("%p EditAggregateTransaction::%s this={ mName=%s } "
+           "End================================",
+           this, __FUNCTION__,
+           nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
+  return NS_OK;
+}
+
+NS_IMETHODIMP EditAggregateTransaction::Merge(nsITransaction* aOtherTransaction,
+                                              bool* aDidMerge) {
+  if (aDidMerge) {
+    *aDidMerge = false;
+  }
+  if (mChildren.IsEmpty()) {
+    MOZ_LOG(GetLogModule(), LogLevel::Debug,
+            ("%p EditAggregateTransaction::%s this={ mName=%s } returned false "
+             "due to no children",
+             this, __FUNCTION__,
+             nsAtomCString(mName ? mName.get() : nsGkAtoms::_empty).get()));
+    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.
+  return mChildren[0]->Merge(aOtherTransaction, aDidMerge);
+}
+
+nsAtom* EditAggregateTransaction::GetName() const { return mName; }
+
+}  // namespace mozilla