--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/MergeIdenticalElementsCommand.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,89 @@
+/*
+ * 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 "MergeIdenticalElementsCommand.h"
+
+#include "Element.h"
+
+namespace WebCore {
+
+MergeIdenticalElementsCommand::MergeIdenticalElementsCommand(PassRefPtr<Element> first, PassRefPtr<Element> second)
+    : SimpleEditCommand(first->document())
+    , m_element1(first)
+    , m_element2(second)
+{
+    ASSERT(m_element1);
+    ASSERT(m_element2);
+    ASSERT(m_element1->nextSibling() == m_element2);
+}
+
+void MergeIdenticalElementsCommand::doApply()
+{
+    if (m_element1->nextSibling() != m_element2 || !m_element1->isContentEditable() || !m_element2->isContentEditable())
+        return;
+
+    m_atChild = m_element2->firstChild();
+
+    ExceptionCode ec = 0;
+
+    Vector<RefPtr<Node> > children;
+    for (Node* child = m_element1->firstChild(); child; child = child->nextSibling())
+        children.append(child);
+
+    size_t size = children.size();
+    for (size_t i = 0; i < size; ++i)
+        m_element2->insertBefore(children[i].release(), m_atChild.get(), ec);
+
+    m_element1->remove(ec);
+}
+
+void MergeIdenticalElementsCommand::doUnapply()
+{
+    ASSERT(m_element1);
+    ASSERT(m_element2);
+
+    RefPtr<Node> atChild = m_atChild.release();
+
+    Node* parent = m_element2->parent();
+    if (!parent || !parent->isContentEditable())
+        return;
+
+    ExceptionCode ec = 0;
+
+    parent->insertBefore(m_element1.get(), m_element2.get(), ec);
+    if (ec)
+        return;
+
+    Vector<RefPtr<Node> > children;
+    for (Node* child = m_element2->firstChild(); child && child != atChild; child = child->nextSibling())
+        children.append(child);
+
+    size_t size = children.size();
+    for (size_t i = 0; i < size; ++i)
+        m_element1->appendChild(children[i].release(), ec);
+}
+
+} // namespace WebCore