QString commentifyDocString( const QString & docString, int indentLevel = 0 )
{
QString indentString;
for( int i=0; i<indentLevel; i++ )
indentString += "\t";
QString outString(indentString +"/**\n");
// Unix \n, windows \n\r, mac \r
QStringList lines = docString.split( QRegExp( "[\n\r]\r?" ) );
QString commentStart("/*"), commentEnd("*/");
foreach( QString line, lines ) {
line = line.replace( commentStart, "" );
line = line.replace( commentEnd, "" );
outString += indentString + " * " + line + "\n";
}
void XMLPreferences::savePreferences(const QString& filename,
PrefSectionDict& dict)
{
// open the existing preference file
QDomDocument doc;
QFile f(filename);
bool loaded = false;
if (f.open(IO_ReadOnly))
{
QString errorMsg;
int errorLine = 0;
int errorColumn = 0;
if (doc.setContent(&f, false, &errorMsg, &errorLine, &errorColumn))
loaded = true;
else
{
qWarning("Error processing file: %s!\n\t %s on line %d in column %d!",
(const char*)filename,
(const char*)errorMsg, errorLine, errorColumn);
}
// close the file
f.close();
}
// if no file was loaded, use the template document
if (!loaded)
{
QString errorMsg;
int errorLine = 0;
int errorColumn = 0;
if (doc.setContent(m_templateDoc, false, &errorMsg, &errorLine, &errorColumn))
loaded = true;
}
// if there was an existing file, rename it
QFileInfo fileInfo(filename);
if (fileInfo.exists())
{
QDir dir(fileInfo.dirPath(true));
dir.rename(filename, filename + QString(".bak"));
}
// do more processing here
QDomElement docElem = doc.documentElement();
DomConvenience conv(doc);
QDomNodeList sectionList, propertyList;
PreferenceDict* sectionDict;
QString sectionName;
QString propertyName;
QVariant* propertyValue;
QDomElement e;
QDomNode n;
sectionList = docElem.elementsByTagName("section");
QDictIterator<PreferenceDict> sdit(dict);
for (; sdit.current(); ++sdit)
{
QDomElement section;
sectionName = sdit.currentKey();
sectionDict = sdit.current();
// iterate over all the sections in the document
for (uint i = 0; i < sectionList.length(); i++)
{
e = sectionList.item(i).toElement();
if (!e.hasAttribute("name"))
{
qWarning("section without name!");
continue;
}
// printf("found section: %s\n", (const char*)section.attribute("name"));
// is this the section?
if (sectionName == e.attribute("name"))
{
// yes, done
section = e;
break;
}
}
// if no section was found, create a new one
if (section.isNull())
{
// create the section element
section = doc.createElement("section");
// set the name attribute of the section element
section.setAttribute("name", sectionName);
// append the new section to the document
docElem.appendChild(section);
}
// iterate over all the properties in the section
QDictIterator<QVariant> pdit(*sectionDict);
for (; pdit.current(); ++pdit)
{
QDomElement property;
propertyName = pdit.currentKey();
propertyValue = pdit.current();
// get all the property elements in the section
propertyList = section.elementsByTagName("property");
// iterate over all the property elements until a match is found
for (uint j = 0; j < propertyList.length(); j++)
{
e = propertyList.item(j).toElement();
if (!e.hasAttribute("name"))
{
qWarning("property in section '%s' without name! Ignoring!",
(const char*)sectionName);
continue;
}
// is this the property being searched for?
if (propertyName == e.attribute("name"))
{
// yes, done
property = e;
break;
}
}
// if no property was found, create a new one
if (property.isNull())
{
// create the property element
property = doc.createElement("property");
// set the name attribute of the property element
property.setAttribute("name", propertyName);
// append the new property to the section
section.appendChild(property);
}
QDomElement value;
// iterate over the children
for (n = property.firstChild();
!n.isNull();
n = n.nextSibling())
{
if (!n.isElement())
continue;
// don't replace comments
if (n.toElement().tagName() == "comment")
continue;
// convert it to an element
value = n.toElement();
break;
}
// if no value element was found, create a new one
if (value.isNull())
{
// create the value element, bogus type, will be filled in later
value = doc.createElement("bogus");
// append the new value to the property
property.appendChild(value);
}
if (!conv.variantToElement(*propertyValue, value))
{
qWarning("Unable to set value element in section '%s' property '%s'!",
(const char*)propertyName, (const char*)propertyName);
}
}
}
// write the modified DOM to disk
if (!f.open(IO_WriteOnly))
{
qWarning("Unable to open file for writing: %s!",
(const char*)filename);
}
// open a Text Stream on the file
QTextStream out(&f);
// make sure stream is UTF8 encoded
out.setEncoding(QTextStream::UnicodeUTF8);
// save the document to the text stream
QString docText;
QTextStream docTextStream(&docText, IO_WriteOnly);
doc.save(docTextStream, 4);
// put newlines after comments (which unfortunately Qt's DOM doesn't track)
QRegExp commentEnd("-->");
docText.replace(commentEnd, "-->\n");
// write the fixed document out to the file
out << docText;
// close the file
f.close();
printf("Finished saving preferences to file: %s\n",
(const char*)filename);
}
