--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/projection/qprojectedexpression_p.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,165 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef Patternist_ProjectedExpression_H
+#define Patternist_ProjectedExpression_H
+
+#include "qitem_p.h"
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    class ProjectedExpression
+    {
+    public:
+        typedef ProjectedExpression * Ptr;
+        typedef QVector<ProjectedExpression::Ptr> Vector;
+        virtual ~ProjectedExpression()
+        {
+        }
+
+        enum Action
+        {
+            Move = 0,
+            Skip = 1,
+            Keep = 2,
+            KeepSubtree = 4 | Keep
+        };
+
+        virtual Action actionForElement(const QXmlName name,
+                                        ProjectedExpression::Ptr &next) const
+        {
+            Q_UNUSED(name);
+            Q_UNUSED(next);
+            return Skip;
+        }
+
+    };
+
+    class ProjectedNodeTest
+    {
+    public:
+        typedef ProjectedNodeTest * Ptr;
+        virtual ~ProjectedNodeTest()
+        {
+        }
+
+        virtual bool isMatch(const QXmlNodeModelIndex::NodeKind kind) const
+        {
+            Q_UNUSED(kind);
+            return false;
+        }
+    };
+
+    class ProjectedStep : public ProjectedExpression
+    {
+    public:
+        ProjectedStep(const ProjectedNodeTest::Ptr test,
+                      const QXmlNodeModelIndex::Axis axis) : m_test(test),
+                                               m_axis(axis)
+        {
+            Q_ASSERT(m_test);
+        }
+
+        virtual Action actionForElement(const QXmlName name,
+                                        ProjectedExpression::Ptr &next) const
+        {
+            Q_UNUSED(name);
+            Q_UNUSED(next);
+            // TODO
+            return Skip;
+        }
+
+    private:
+        const ProjectedNodeTest::Ptr    m_test;
+        const QXmlNodeModelIndex::Axis                m_axis;
+    };
+
+    class ProjectedPath : public ProjectedExpression
+    {
+    public:
+        ProjectedPath(const ProjectedExpression::Ptr left,
+                      const ProjectedExpression::Ptr right) : m_left(left),
+                                                              m_right(right)
+        {
+            Q_ASSERT(m_left);
+            Q_ASSERT(m_right);
+        }
+
+        virtual Action actionForElement(const QXmlName name,
+                                        ProjectedExpression::Ptr &next) const
+        {
+            ProjectedExpression::Ptr &candidateNext = next;
+            const Action a = m_left->actionForElement(name, candidateNext);
+
+            if(a != Skip)
+            {
+                /* The test accepted it, so let's replace us with the new step. */
+                next = candidateNext;
+            }
+
+            return a;
+        }
+
+    private:
+        const ProjectedExpression::Ptr  m_left;
+        const ProjectedExpression::Ptr  m_right;
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif