--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/SplitTextNodeCommand.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "SplitTextNodeCommand.h"
+
+#include "Document.h"
+#include "Text.h"
+#include <wtf/Assertions.h>
+
+namespace WebCore {
+
+SplitTextNodeCommand::SplitTextNodeCommand(PassRefPtr<Text> text, int offset)
+    : SimpleEditCommand(text->document())
+    , m_text2(text)
+    , m_offset(offset)
+{
+    // NOTE: Various callers rely on the fact that the original node becomes
+    // the second node (i.e. the new node is inserted before the existing one).
+    // That is not a fundamental dependency (i.e. it could be re-coded), but
+    // rather is based on how this code happens to work.
+    ASSERT(m_text2);
+    ASSERT(m_text2->length() > 0);
+    ASSERT(m_offset > 0);
+    ASSERT(m_offset < m_text2->length());
+}
+
+void SplitTextNodeCommand::doApply()
+{
+    Node* parent = m_text2->parentNode();
+    if (!parent || !parent->isContentEditable())
+        return;
+
+    ExceptionCode ec = 0;
+
+    String prefixText = m_text2->substringData(0, m_offset, ec);
+    if (prefixText.isEmpty())
+        return;
+
+    RefPtr<Text> prefixTextNode = Text::create(document(), prefixText);
+    ASSERT(prefixTextNode);
+    document()->copyMarkers(m_text2.get(), 0, m_offset, prefixTextNode.get(), 0);
+
+    parent->insertBefore(prefixTextNode.get(), m_text2.get(), ec);
+    if (ec)
+        return;
+
+    m_text2->deleteData(0, m_offset, ec);
+    m_text1 = prefixTextNode.release();
+}
+
+void SplitTextNodeCommand::doUnapply()
+{
+    if (!m_text1 || !m_text1->isContentEditable())
+        return;
+
+    ASSERT(m_text1->document() == document());
+
+    RefPtr<Text> prefixTextNode = m_text1.release();
+    String prefixText = prefixTextNode->data();
+
+    ExceptionCode ec = 0;
+    m_text2->insertData(0, prefixText, ec);
+    if (ec)
+        return;
+
+    document()->copyMarkers(prefixTextNode.get(), 0, prefixText.length(), m_text2.get(), 0);
+    prefixTextNode->remove(ec);
+}
+
+} // namespace WebCore