new file for text reflow optimiziation

git-svn-id: svn://10.0.0.236/trunk@51392 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/base/src/nsTextContentChangeData.cpp

@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Mozilla Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+#include "nsTextContentChangeData.h"
+
+// Create a new instance of nsTextContentChangeData with a refcnt of 1
+nsresult
+NS_NewTextContentChangeData(nsTextContentChangeData** aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+  nsTextContentChangeData* it = new nsTextContentChangeData();
+  if (!it) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  it->mRefCnt++;
+  *aResult = it;
+  return NS_OK;
+}
+
+nsTextContentChangeData::nsTextContentChangeData()
+  : mType(Insert),
+    mOffset(0),
+    mLength(0),
+    mReplaceLength(0)
+{
+  NS_INIT_REFCNT();
+}
+
+nsTextContentChangeData::~nsTextContentChangeData()
+{
+}
+
+NS_IMPL_ISUPPORTS1(nsTextContentChangeData, nsITextContentChangeData);
+
+
+NS_IMETHODIMP
+nsTextContentChangeData::GetChangeType(ChangeType* aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+  *aResult = mType;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsTextContentChangeData::GetReplaceData(PRInt32* aOffset,
+                                        PRInt32* aSourceLength,
+                                        PRInt32* aReplaceLength)
+{
+  NS_ENSURE_ARG_POINTER(aOffset);
+  NS_ENSURE_ARG_POINTER(aSourceLength);
+  NS_ENSURE_ARG_POINTER(aReplaceLength);
+  *aOffset = mOffset;
+  *aSourceLength = mLength;
+  *aReplaceLength = mReplaceLength;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsTextContentChangeData::GetInsertData(PRInt32* aOffset,
+                                       PRInt32* aInsertLength)
+{
+  NS_ENSURE_ARG_POINTER(aOffset);
+  NS_ENSURE_ARG_POINTER(aInsertLength);
+  *aOffset = mOffset;
+  *aInsertLength = mLength;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsTextContentChangeData::GetAppendData(PRInt32* aOffset,
+                                       PRInt32* aAppendLength)
+{
+  NS_ENSURE_ARG_POINTER(aOffset);
+  NS_ENSURE_ARG_POINTER(aAppendLength);
+  *aOffset = mOffset;
+  *aAppendLength = mLength;
+  return NS_OK;
+}