--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/MoveSelectionCommand.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2005, 2006 Apple Computer, 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 "MoveSelectionCommand.h"
+
+#include "DocumentFragment.h"
+#include "ReplaceSelectionCommand.h"
+
+namespace WebCore {
+
+MoveSelectionCommand::MoveSelectionCommand(PassRefPtr<DocumentFragment> fragment, const Position& position, bool smartInsert, bool smartDelete) 
+    : CompositeEditCommand(position.node()->document()), m_fragment(fragment), m_position(position), m_smartInsert(smartInsert), m_smartDelete(smartDelete)
+{
+    ASSERT(m_fragment);
+}
+
+void MoveSelectionCommand::doApply()
+{
+    VisibleSelection selection = endingSelection();
+    ASSERT(selection.isRange());
+
+    Position pos = m_position;
+    if (pos.isNull())
+        return;
+        
+    // Update the position otherwise it may become invalid after the selection is deleted.
+    Node *positionNode = m_position.node();
+    int positionOffset = m_position.deprecatedEditingOffset();
+    Position selectionEnd = selection.end();
+    int selectionEndOffset = selectionEnd.deprecatedEditingOffset();
+    if (selectionEnd.node() == positionNode && selectionEndOffset < positionOffset) {
+        positionOffset -= selectionEndOffset;
+        Position selectionStart = selection.start();
+        if (selectionStart.node() == positionNode) {
+            positionOffset += selectionStart.deprecatedEditingOffset();
+        }
+        pos = Position(positionNode, positionOffset);
+    }
+
+    deleteSelection(m_smartDelete);
+
+    // If the node for the destination has been removed as a result of the deletion,
+    // set the destination to the ending point after the deletion.
+    // Fixes: <rdar://problem/3910425> REGRESSION (Mail): Crash in ReplaceSelectionCommand; 
+    //        selection is empty, leading to null deref
+    if (!pos.node()->inDocument())
+        pos = endingSelection().start();
+
+    setEndingSelection(VisibleSelection(pos, endingSelection().affinity()));
+    if (!positionNode->inDocument()) {
+        // Document was modified out from under us.
+        return;
+    }
+    applyCommandToComposite(ReplaceSelectionCommand::create(positionNode->document(), m_fragment, true, m_smartInsert));
+}
+
+EditAction MoveSelectionCommand::editingAction() const
+{
+    return EditActionDrag;
+}
+
+} // namespace WebCore