bool Wizard::IniSettings::writeFile(const QString &path, QTextStream &stream)
{
// Look for a square bracket, "'\\["
// that has one or more "not nothing" in it, "([^]]+)"
// and is closed with a square bracket, "\\]"
QRegExp sectionRe(QLatin1String("^\\[([^]]+)\\]"));
// Find any character(s) that is/are not equal sign(s), "[^=]+"
// followed by an optional whitespace, an equal sign, and another optional whitespace, "\\s*=\\s*"
// and one or more periods, "(.+)"
QRegExp keyRe(QLatin1String("^([^=]+)\\s*=\\s*(.+)$"));
const QStringList keys(mSettings.keys());
QString currentSection;
QString buffer;
while (!stream.atEnd()) {
const QString line(stream.readLine());
if (line.isEmpty() || line.startsWith(QLatin1Char(';'))) {
buffer.append(line + QLatin1String("\n"));
continue;
}
if (sectionRe.exactMatch(line)) {
buffer.append(line + QLatin1String("\n"));
currentSection = sectionRe.cap(1);
} else if (keyRe.indexIn(line) != -1) {
QString key(keyRe.cap(1).trimmed());
QString lookupKey(key);
// Append the section, but only if there is one
if (!currentSection.isEmpty())
lookupKey = currentSection + QLatin1Char('/') + key;
buffer.append(key + QLatin1Char('=') + mSettings[lookupKey].toString() + QLatin1String("\n"));
mSettings.remove(lookupKey);
}
}
// Add the new settings to the buffer
QHashIterator<QString, QVariant> i(mSettings);
while (i.hasNext()) {
i.next();
QStringList fullKey(i.key().split(QLatin1Char('/')));
QString section(fullKey.at(0));
section.prepend(QLatin1Char('['));
section.append(QLatin1Char(']'));
QString key(fullKey.at(1));
int index = buffer.lastIndexOf(section);
if (index != -1) {
// Look for the next section
index = buffer.indexOf(QLatin1Char('['), index + 1);
if (index == -1 ) {
// We are at the last section, append it to the bottom of the file
buffer.append(QString("\n%1=%2").arg(key, i.value().toString()));
mSettings.remove(i.key());
continue;
} else {
// Not at last section, add the key at the index
buffer.insert(index - 1, QString("\n%1=%2").arg(key, i.value().toString()));
mSettings.remove(i.key());
}
} else {
// Add the section to the end of the file, because it's not found
buffer.append(QString("\n%1\n").arg(section));
i.previous();
}
}
// Now we reopen the file, this time we write
QFile file(path);
if (file.open(QIODevice::ReadWrite | QIODevice::Truncate | QIODevice::Text)) {
QTextStream in(&file);
in.setCodec(stream.codec());
// Write the updated buffer to an empty file
in << buffer;
file.flush();
file.close();
} else {
return false;
}
return true;
}
