Qt 5.6 | Qt XML | SAX Bookmarks Example | xbelgenerator.cpp Example File

Qt 5.6.2 Reference Documentation

# xbelgenerator.cpp Example File

saxbookmarks/xbelgenerator.cpp

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      #include <QtWidgets>

      #include "xbelgenerator.h"

      XbelGenerator::XbelGenerator(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("\"", "&quot;");
          result.prepend(QLatin1Char('"'));
          result.append(QLatin1Char('"'));
          return result;
      }

      void XbelGenerator::generateItem(QTreeWidgetItem *item, int depth)
      {
          QString tagName = item->data(0, Qt::UserRole).toString();
          if (tagName == "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 == "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 == "separator") {
              out << indent(depth) << "<separator/>\n";
          }
      }