qt5base-lts/examples/xml/saxbookmarks/xbelgenerator.cpp
Friedemann Kleint 8d71fae080 Polish the XML bookmarks examples
- Use Qt 5 connect syntax.
- Streamline code, remove unused members.
- Add a context menu for copying and opening the URLs.
- Add const to XML code.
- In the XML code, show the use of QStringLiteral in static inline
  functions to create strings versus QLatin1String in comparison
  overloads to avoid allocating strings from const char * literals.

Change-Id: Ib5e62ca188e271ffe01996dff3c9ea8e0b60739a
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
2017-02-17 05:55:19 +00:00

125 lines
4.6 KiB
C++

/****************************************************************************
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#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";
}
}