/****************************************************************************
**
** 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.
**
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QXMLNAME_H
#define QXMLNAME_H

#include <QtCore/QString>
#include <QtCore/QMetaType>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(XmlPatterns)

class QXmlName;
class QXmlNamePool;
Q_XMLPATTERNS_EXPORT uint qHash(const QXmlName &name);

class Q_XMLPATTERNS_EXPORT QXmlName
{
private:
    enum Constant
    {
        LocalNameOffset     = 0,
        LocalNameLength     = 12,
        NamespaceOffset     = LocalNameLength,
        NamespaceLength     = 9,
        PrefixLength        = 9,
        InvalidCode         = 1 << 31,
        NamespaceMask       = ((1 << ((NamespaceOffset + NamespaceLength) - NamespaceOffset)) - 1) << NamespaceOffset,
        LocalNameMask       = ((1 << ((LocalNameOffset + LocalNameLength) - LocalNameOffset)) - 1) << LocalNameOffset,
        PrefixOffset        = LocalNameLength + NamespaceLength,
        PrefixMask          = ((1 << ((PrefixOffset + PrefixLength) - PrefixOffset)) - 1) << PrefixOffset,
        MaximumPrefixes     = (PrefixMask >> PrefixOffset) - 1,
        MaximumLocalNames   = (LocalNameMask >> LocalNameOffset) - 1,
        MaximumNamespaces   = (NamespaceMask >> NamespaceOffset) - 1,
        ExpandedNameMask    = LocalNameMask | NamespaceMask,
        LexicalQNameMask    = LocalNameMask | PrefixMask
    };

public:

    typedef qint16 NamespaceCode;
    typedef NamespaceCode PrefixCode;
    typedef NamespaceCode LocalNameCode;

    QXmlName();

    QXmlName(QXmlNamePool &namePool,
             const QString &localName,
             const QString &namespaceURI = QString(),
             const QString &prefix = QString());

    QString namespaceUri(const QXmlNamePool &query) const;
    QString prefix(const QXmlNamePool &query) const;
    QString localName(const QXmlNamePool &query) const;
    QString toClarkName(const QXmlNamePool &query) const;
    bool operator==(const QXmlName &other) const;
    bool operator!=(const QXmlName &other) const;
    QXmlName &operator=(const QXmlName &other);
    bool isNull() const;
    static bool isNCName(const QString &candidate);
    static QXmlName fromClarkName(const QString &clarkName,
                                  const QXmlNamePool &namePool);

    /* The members below are internal, not part of the public API, and
     * unsupported. Using them leads to undefined behavior. */
    typedef qint64 Code;

    inline QXmlName(const NamespaceCode uri,
                    const LocalNameCode ln,
                    const PrefixCode p = 0);
    /* The implementation for these functions are in utils/qnamepool_p.h. */
    inline LocalNameCode localName() const;
    inline PrefixCode prefix() const;
    inline bool hasPrefix() const;
    inline bool hasNamespace() const;
    inline NamespaceCode namespaceURI() const;
    inline bool isLexicallyEqual(const QXmlName &other) const;
    inline void setPrefix(const PrefixCode c);
    inline void setNamespaceURI(const NamespaceCode c);
    inline void setLocalName(const LocalNameCode c);
    inline Code code() const;

    friend Q_XMLPATTERNS_EXPORT uint qHash(const QXmlName &);

private:
    inline QXmlName(const int c) : m_qNameCode(c)
    {
    }

    Code m_qNameCode;
};

Q_DECLARE_TYPEINFO(QXmlName, Q_MOVABLE_TYPE);

QT_END_NAMESPACE

Q_DECLARE_METATYPE(QXmlName) /* This macro must appear after QT_END_NAMESPACE. */

QT_END_HEADER

#endif
