1 files changed, 147 insertions, 0 deletions
diff --git a/editor/libeditor/CreateElementTransaction.cpp b/editor/libeditor/CreateElementTransaction.cpp
new file mode 100644
index 0000000000..5e4bd961cd
--- /dev/null
+++ b/editor/libeditor/CreateElementTransaction.cpp
@@ -0,0 +1,147 @@
+/* -*- 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 "CreateElementTransaction.h"
+
+#include <algorithm>
+#include <stdio.h>
+
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/Selection.h"
+
+#include "mozilla/Casting.h"
+#include "mozilla/EditorBase.h"
+
+#include "nsAlgorithm.h"
+#include "nsAString.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsIContent.h"
+#include "nsIDOMCharacterData.h"
+#include "nsIEditor.h"
+#include "nsINode.h"
+#include "nsISupportsUtils.h"
+#include "nsMemory.h"
+#include "nsReadableUtils.h"
+#include "nsStringFwd.h"
+#include "nsString.h"
+
+namespace mozilla {
+
+using namespace dom;
+
+CreateElementTransaction::CreateElementTransaction(EditorBase& aEditorBase,
+                                                   nsIAtom& aTag,
+                                                   nsINode& aParent,
+                                                   int32_t aOffsetInParent)
+  : EditTransactionBase()
+  , mEditorBase(&aEditorBase)
+  , mTag(&aTag)
+  , mParent(&aParent)
+  , mOffsetInParent(aOffsetInParent)
+{
+}
+
+CreateElementTransaction::~CreateElementTransaction()
+{
+}
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(CreateElementTransaction,
+                                   EditTransactionBase,
+                                   mParent,
+                                   mNewNode,
+                                   mRefNode)
+
+NS_IMPL_ADDREF_INHERITED(CreateElementTransaction, EditTransactionBase)
+NS_IMPL_RELEASE_INHERITED(CreateElementTransaction, EditTransactionBase)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CreateElementTransaction)
+NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
+
+
+NS_IMETHODIMP
+CreateElementTransaction::DoTransaction()
+{
+  MOZ_ASSERT(mEditorBase && mTag && mParent);
+
+  mNewNode = mEditorBase->CreateHTMLContent(mTag);
+  NS_ENSURE_STATE(mNewNode);
+
+  // Try to insert formatting whitespace for the new node:
+  mEditorBase->MarkNodeDirty(GetAsDOMNode(mNewNode));
+
+  // Insert the new node
+  ErrorResult rv;
+  if (mOffsetInParent == -1) {
+    mParent->AppendChild(*mNewNode, rv);
+    return rv.StealNSResult();
+  }
+
+  mOffsetInParent = std::min(mOffsetInParent,
+                             static_cast<int32_t>(mParent->GetChildCount()));
+
+  // Note, it's ok for mRefNode to be null. That means append
+  mRefNode = mParent->GetChildAt(mOffsetInParent);
+
+  nsCOMPtr<nsIContent> refNode = mRefNode;
+  mParent->InsertBefore(*mNewNode, refNode, rv);
+  NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult());
+
+  // Only set selection to insertion point if editor gives permission
+  if (!mEditorBase->GetShouldTxnSetSelection()) {
+    // Do nothing - DOM range gravity will adjust selection
+    return NS_OK;
+  }
+
+  RefPtr<Selection> selection = mEditorBase->GetSelection();
+  NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
+
+  rv = selection->CollapseNative(mParent, mParent->IndexOf(mNewNode) + 1);
+  NS_ASSERTION(!rv.Failed(),
+               "selection could not be collapsed after insert");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+CreateElementTransaction::UndoTransaction()
+{
+  MOZ_ASSERT(mEditorBase && mParent);
+
+  ErrorResult rv;
+  mParent->RemoveChild(*mNewNode, rv);
+
+  return rv.StealNSResult();
+}
+
+NS_IMETHODIMP
+CreateElementTransaction::RedoTransaction()
+{
+  MOZ_ASSERT(mEditorBase && mParent);
+
+  // First, reset mNewNode so it has no attributes or content
+  // XXX We never actually did this, we only cleared mNewNode's contents if it
+  // was a CharacterData node (which it's not, it's an Element)
+
+  // Now, reinsert mNewNode
+  ErrorResult rv;
+  nsCOMPtr<nsIContent> refNode = mRefNode;
+  mParent->InsertBefore(*mNewNode, refNode, rv);
+  return rv.StealNSResult();
+}
+
+NS_IMETHODIMP
+CreateElementTransaction::GetTxnDescription(nsAString& aString)
+{
+  aString.AssignLiteral("CreateElementTransaction: ");
+  aString += nsDependentAtomString(mTag);
+  return NS_OK;
+}
+
+already_AddRefed<Element>
+CreateElementTransaction::GetNewNode()
+{
+  return nsCOMPtr<Element>(mNewNode).forget();
+}
+
+} // namespace mozilla