Qt 5.11 | Qt XML | SAX Bookmarks Example | xbelgenerator.cpp Example File

Qt 5.11.3 Reference Documentation

# xbelgenerator.cpp Example File

saxbookmarks/xbelgenerator.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** 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 https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include <QtWidgets>

      #include "xbelgenerator.h"

      XbelGenerator::XbelGenerator(const QTreeWidget *treeWidget)
          : treeWidget(treeWidget)
      {
      }

      bool XbelGenerator::write(QIODevice *device)
      {
          out.setDevice(device);
          out.setCodec("UTF-8");
          out << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
              << "<!DOCTYPE xbel>\n"
              << "<xbel version=\"1.0\">\n";

          for (int i = 0; i < treeWidget->topLevelItemCount(); ++i)
              generateItem(treeWidget->topLevelItem(i), 1);

          out << "</xbel>\n";
          return true;
      }

      QString XbelGenerator::indent(int depth)
      {
          const int IndentSize = 4;
          return QString(IndentSize * depth, ' ');
      }

      QString XbelGenerator::escapedText(const QString &str)
      {
          QString result = str;
          result.replace('&', "&amp;");
          result.replace('<', "&lt;");
          result.replace('>', "&gt;");
          return result;
      }

      QString XbelGenerator::escapedAttribute(const QString &str)
      {
          QString result = escapedText(str);
          result.replace(QLatin1Char('"'), "&quot;");
          result.prepend(QLatin1Char('"'));
          result.append(QLatin1Char('"'));
          return result;
      }

      void XbelGenerator::generateItem(const QTreeWidgetItem *item, int depth)
      {
          QString tagName = item->data(0, Qt::UserRole).toString();
          if (tagName == QLatin1String("folder")) {
              bool folded = !treeWidget->isItemExpanded(item);
              out << indent(depth) << "<folder folded=\"" << (folded ? "yes" : "no")
                                   << "\">\n"
                  << indent(depth + 1) << "<title>" << escapedText(item->text(0))
                                       << "</title>\n";

              for (int i = 0; i < item->childCount(); ++i)
                  generateItem(item->child(i), depth + 1);

              out << indent(depth) << "</folder>\n";
          } else if (tagName == QLatin1String("bookmark")) {
              out << indent(depth) << "<bookmark";
              if (!item->text(1).isEmpty())
                  out << " href=" << escapedAttribute(item->text(1));
              out << ">\n"
                  << indent(depth + 1) << "<title>" << escapedText(item->text(0))
                                       << "</title>\n"
                  << indent(depth) << "</bookmark>\n";
          } else if (tagName == QLatin1String("separator")) {
              out << indent(depth) << "<separator/>\n";
          }
      }