/****************************************************************************

**

** Copyright (C) 2008 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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**

** $QT_END_LICENSE$

**

****************************************************************************/

//

//  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.

#include "qnamespacesupport_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

NamespaceSupport::NamespaceSupport()

{

}

NamespaceSupport::NamespaceSupport(const NamePool::Ptr &namePool)

    : m_namePool(namePool)

{

    // the XML namespace

    m_ns.insert(StandardPrefixes::xml, StandardNamespaces::xml);

}

void NamespaceSupport::setPrefix(const QXmlName::PrefixCode prefixCode, const QXmlName::NamespaceCode namespaceCode)

{

    m_ns.insert(prefixCode, namespaceCode);

}

void NamespaceSupport::setPrefixes(const QXmlStreamNamespaceDeclarations &declarations)

{

    for (int i = 0; i < declarations.count(); i++) {

        const QXmlStreamNamespaceDeclaration declaration = declarations.at(i);

        const QXmlName::PrefixCode prefixCode = m_namePool->allocatePrefix(declaration.prefix().toString());

        const QXmlName::NamespaceCode namespaceCode = m_namePool->allocateNamespace(declaration.namespaceUri().toString());

        m_ns.insert(prefixCode, namespaceCode);

    }

}

void NamespaceSupport::setTargetNamespace(const QXmlName::NamespaceCode namespaceCode)

{

    m_ns.insert(0, namespaceCode);

}

QXmlName::PrefixCode NamespaceSupport::prefix(const QXmlName::NamespaceCode namespaceCode) const

{

    NamespaceHash::const_iterator itc, it = m_ns.constBegin();

    while ((itc=it) != m_ns.constEnd()) {

        ++it;

        if (*itc == namespaceCode)

            return itc.key();

    }

    return 0;

}

QXmlName::NamespaceCode NamespaceSupport::uri(const QXmlName::PrefixCode prefixCode) const

{

    return m_ns.value(prefixCode);

}

bool NamespaceSupport::processName(const QString& qname, NameType type, QXmlName &name) const

{

    int len = qname.size();

    const QChar *data = qname.constData();

    for (int pos = 0; pos < len; ++pos) {

        if (data[pos] == QLatin1Char(':')) {

            const QXmlName::PrefixCode prefixCode = m_namePool->allocatePrefix(qname.left(pos));

            if (!m_ns.contains(prefixCode))

                return false;

            const QXmlName::NamespaceCode namespaceCode = uri(prefixCode);

            const QXmlName::LocalNameCode localNameCode = m_namePool->allocateLocalName(qname.mid(pos + 1));

            name = QXmlName(namespaceCode, localNameCode, prefixCode);

            return true;

        }

    }

    // there was no ':'

    QXmlName::NamespaceCode namespaceCode = 0;

    // attributes don't take default namespace

    if (type == ElementName && !m_ns.isEmpty()) {

        namespaceCode = m_ns.value(0);   // get default namespace

    }

    const QXmlName::LocalNameCode localNameCode = m_namePool->allocateLocalName(qname);

    name = QXmlName(namespaceCode, localNameCode, 0);

    return true;

}

void NamespaceSupport::pushContext()

{

    m_nsStack.push(m_ns);

}

void NamespaceSupport::popContext()

{

    m_ns.clear();

    if(!m_nsStack.isEmpty())

        m_ns = m_nsStack.pop();

}

QList<QXmlName> NamespaceSupport::namespaceBindings() const

{

    QList<QXmlName> bindings;

    QHashIterator<QXmlName::PrefixCode, QXmlName::NamespaceCode> it(m_ns);

    while (it.hasNext()) {

        it.next();

        bindings.append(QXmlName(it.value(), StandardLocalNames::empty, it.key()));

    }

    return bindings;

}

QT_END_NAMESPACE