text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/contact-us.
  **
  ** 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 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #include <QStringList>
  
  #include "private/qxmlutils_p.h"
  #include "qbuiltintypes_p.h"
  #include "qcommonvalues_p.h"
  #include "qnamepool_p.h"
  
  #include "qxpathhelper_p.h"
  
  QT_BEGIN_NAMESPACE
  
  using namespace QPatternist;
  
  bool XPathHelper::isReservedNamespace(const QXmlName::NamespaceCode ns)
  {
      /* The order is because of that XFN and WXS are the most common. */
      return ns == StandardNamespaces::fn     ||
             ns == StandardNamespaces::xs     ||
             ns == StandardNamespaces::xml    ||
             ns == StandardNamespaces::xsi;
  }
  
  bool XPathHelper::isQName(const QString &qName)
  {
      const QStringList result(qName.split(QLatin1Char(':')));
      const int c = result.count();
  
      if(c == 2)
      {
          return QXmlUtils::isNCName(result.first()) &&
                 QXmlUtils::isNCName(result.last());
      }
      else if(c == 1)
          return QXmlUtils::isNCName(result.first());
      else
          return false;
  }
  
  void XPathHelper::splitQName(const QString &qName, QString &prefix, QString &ncName)
  {
      Q_ASSERT_X(isQName(qName), Q_FUNC_INFO,
                 "qName must be a valid QName.");
  
      const QStringList result(qName.split(QLatin1Char(':')));
  
      if(result.count() == 1)
      {
          Q_ASSERT(QXmlUtils::isNCName(result.first()));
          ncName = result.first();
      }
      else
      {
          Q_ASSERT(result.count() == 2);
          Q_ASSERT(QXmlUtils::isNCName(result.first()));
          Q_ASSERT(QXmlUtils::isNCName(result.last()));
  
          prefix = result.first();
          ncName = result.last();
      }
  }
  
  ItemType::Ptr XPathHelper::typeFromKind(const QXmlNodeModelIndex::NodeKind nodeKind)
  {
      switch(nodeKind)
      {
          case QXmlNodeModelIndex::Element:
              return BuiltinTypes::element;
          case QXmlNodeModelIndex::Attribute:
              return BuiltinTypes::attribute;
          case QXmlNodeModelIndex::Text:
              return BuiltinTypes::text;
          case QXmlNodeModelIndex::ProcessingInstruction:
              return BuiltinTypes::pi;
          case QXmlNodeModelIndex::Comment:
              return BuiltinTypes::comment;
          case QXmlNodeModelIndex::Document:
              return BuiltinTypes::document;
          default:
          {
              Q_ASSERT_X(false, Q_FUNC_INFO,
                         "A node type that doesn't exist in the XPath Data Model was encountered.");
              return ItemType::Ptr(); /* Dummy, silence compiler warning. */
          }
      }
  }
  
  QUrl XPathHelper::normalizeQueryURI(const QUrl &uri)
  {
      Q_ASSERT_X(uri.isEmpty() || uri.isValid(), Q_FUNC_INFO,
                 "The URI passed to QXmlQuery::setQuery() must be valid or empty.");
      if(uri.isEmpty())
          return QUrl::fromLocalFile(QCoreApplication::applicationFilePath());
      else if(uri.isRelative())
          return QUrl::fromLocalFile(QCoreApplication::applicationFilePath()).resolved(uri);
      else
          return uri;
  }
  
  QT_END_NAMESPACE
  