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diff --git a/qmake/generators/win32/msbuild_objectmodel.h b/qmake/generators/win32/msbuild_objectmodel.h
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+++ b/qmake/generators/win32/msbuild_objectmodel.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the qmake application of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MSBUILD_OBJECTMODEL_H
+#define MSBUILD_OBJECTMODEL_H
+
+#include "project.h"
+#include "xmloutput.h"
+#include "msvc_objectmodel.h"
+#include <qatomic.h>
+#include <qlist.h>
+#include <qstring.h>
+#include <qstringlist.h>
+#include <qmap.h>
+#include <qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+// Tree & Flat view of files --------------------------------------------------
+class XNode
+{
+public:
+    virtual ~XNode() { }
+    void addElement(const VCFilterFile &file) {
+        addElement(file.file, file);
+    }
+    virtual void addElement(const QString &filepath, const VCFilterFile &allInfo) = 0;
+    virtual void removeElements()= 0;
+    virtual void generateXML(XmlOutput &xml, XmlOutput &xmlFilter, const QString &tagName, VCProject &tool, const QString &filter) = 0;
+    virtual bool hasElements() = 0;
+};
+
+class XTreeNode : public XNode
+{
+    typedef QMap<QString, XTreeNode*> ChildrenMap;
+    VCFilterFile info;
+    ChildrenMap children;
+
+public:
+    virtual ~XTreeNode() { removeElements(); }
+
+    int pathIndex(const QString &filepath) {
+        int Windex = filepath.indexOf("\\");
+        int Uindex = filepath.indexOf("/");
+        if (Windex != -1 && Uindex != -1)
+            return qMin(Windex, Uindex);
+        else if (Windex != -1)
+            return Windex;
+        return Uindex;
+    }
+
+    void addElement(const QString &filepath, const VCFilterFile &allInfo){
+        QString newNodeName(filepath);
+
+        int index = pathIndex(filepath);
+        if (index != -1)
+            newNodeName = filepath.left(index);
+
+        XTreeNode *n = children.value(newNodeName);
+        if (!n) {
+            n = new XTreeNode;
+            n->info = allInfo;
+            children.insert(newNodeName, n);
+        }
+        if (index != -1)
+            n->addElement(filepath.mid(index+1), allInfo);
+    }
+
+    void removeElements() {
+        ChildrenMap::ConstIterator it = children.constBegin();
+        ChildrenMap::ConstIterator end = children.constEnd();
+        for( ; it != end; it++) {
+            (*it)->removeElements();
+            delete it.value();
+        }
+        children.clear();
+    }
+
+    void generateXML(XmlOutput &xml, XmlOutput &xmlFilter, const QString &tagName, VCProject &tool, const QString &filter);
+    bool hasElements() {
+        return children.size() != 0;
+    }
+};
+
+class XFlatNode : public XNode
+{
+    typedef QMap<QString, VCFilterFile> ChildrenMapFlat;
+    ChildrenMapFlat children;
+
+public:
+    virtual ~XFlatNode() { removeElements(); }
+
+    int pathIndex(const QString &filepath) {
+        int Windex = filepath.lastIndexOf("\\");
+        int Uindex = filepath.lastIndexOf("/");
+        if (Windex != -1 && Uindex != -1)
+            return qMax(Windex, Uindex);
+        else if (Windex != -1)
+            return Windex;
+        return Uindex;
+    }
+
+    void addElement(const QString &filepath, const VCFilterFile &allInfo){
+        QString newKey(filepath);
+
+        int index = pathIndex(filepath);
+        if (index != -1)
+            newKey = filepath.mid(index+1);
+
+        // Key designed to sort files with same
+        // name in different paths correctly
+        children.insert(newKey + "\0" + allInfo.file, allInfo);
+    }
+
+    void removeElements() {
+        children.clear();
+    }
+
+    void generateXML(XmlOutput &xml, XmlOutput &xmlFilter, const QString &tagName, VCProject &proj, const QString &filter);
+    bool hasElements() {
+        return children.size() != 0;
+    }
+};
+
+class VCXProjectWriter : public VCProjectWriter
+{
+public:
+    void write(XmlOutput &, VCProjectSingleConfig &);
+    void write(XmlOutput &, VCProject &);
+
+    void write(XmlOutput &, const VCCLCompilerTool &);
+    void write(XmlOutput &, const VCLinkerTool &);
+    void write(XmlOutput &, const VCMIDLTool &);
+    void write(XmlOutput &, const VCCustomBuildTool &);
+    void write(XmlOutput &, const VCLibrarianTool &);
+    void write(XmlOutput &, const VCResourceCompilerTool &);
+    void write(XmlOutput &, const VCEventTool &);
+    void write(XmlOutput &, const VCDeploymentTool &);
+    void write(XmlOutput &, const VCConfiguration &);
+    void write(XmlOutput &, VCFilter &);
+
+private:
+    static void addFilters(VCProject &project, XmlOutput &xmlFilter, const QString &filterName);
+    static void outputFilter(VCProject &project, XmlOutput &xml, XmlOutput &xmlFilter, const QString &filtername);
+    static void outputFileConfigs(VCProject &project, XmlOutput &xml, XmlOutput &xmlFilter, const VCFilterFile &info, const QString &filtername);
+    static bool outputFileConfig(VCFilter &filter, XmlOutput &xml, XmlOutput &xmlFilter, const QString &filename, const QString &filtername, bool fileAllreadyAdded);
+
+    friend class XTreeNode;
+    friend class XFlatNode;
+};
+
+QT_END_NAMESPACE
+
+#endif // MSVC_OBJECTMODEL_H