--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderTextFragment.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,91 @@
+/*
+ * (C) 1999 Lars Knoll (knoll@kde.org)
+ * (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "RenderTextFragment.h"
+
+#include "Text.h"
+
+namespace WebCore {
+
+RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)
+    : RenderText(node, str ? str->substring(startOffset, length) : 0)
+    , m_start(startOffset)
+    , m_end(length)
+    , m_firstLetter(0)
+{
+}
+
+RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)
+    : RenderText(node, str)
+    , m_start(0)
+    , m_end(str ? str->length() : 0)
+    , m_contentString(str)
+    , m_firstLetter(0)
+{
+}
+
+PassRefPtr<StringImpl> RenderTextFragment::originalText() const
+{
+    Node* e = node();
+    RefPtr<StringImpl> result = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
+    if (result && (start() > 0 || start() < result->length()))
+        result = result->substring(start(), end());
+    return result.release();
+}
+
+void RenderTextFragment::destroy()
+{
+    if (m_firstLetter)
+        m_firstLetter->destroy();
+    RenderText::destroy();
+}
+
+void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text)
+{
+    RenderText::setTextInternal(text);
+    if (m_firstLetter) {
+        ASSERT(!m_contentString);
+        m_firstLetter->destroy();
+        m_firstLetter = 0;
+        m_start = 0;
+        m_end = textLength();
+        if (Node* t = node()) {
+            ASSERT(!t->renderer());
+            t->setRenderer(this);
+        }
+    }
+}
+
+UChar RenderTextFragment::previousCharacter() const
+{
+    if (start()) {
+        Node* e = node();
+        StringImpl*  original = ((e && e->isTextNode()) ? static_cast<Text*>(e)->dataImpl() : contentString());
+        if (original)
+            return (*original)[start() - 1];
+    }
+
+    return RenderText::previousCharacter();
+}
+
+} // namespace WebCore