qprintdialog_unix.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

            *found = false;
        return 0;
    }
    if (found)
        *found = true;

    char *line = new char[1025];
    line[1024] = '\0';

    QString printerDesc;
    int lineLength = 0;

    char *defaultPrinter = 0;

    while (!pc.atEnd() &&
            (lineLength=pc.readLine(line, 1024)) > 0) {
        if (*line == '#') {
            *line = '\0';
            lineLength = 0;
        }
        if (lineLength >= 2 && line[lineLength-2] == '\\') {
            line[lineLength-2] = '\0';
            printerDesc += QString::fromLocal8Bit(line);
        } else {
            printerDesc += QString::fromLocal8Bit(line);
            printerDesc = printerDesc.simplified();
            int i = printerDesc.indexOf(':');
            QString printerName, printerHost, printerComment;
            QStringList aliases;
            if (i >= 0) {
                // have : want |
                int j = printerDesc.indexOf('|');
                if (j >= i)
                    j = -1;
                printerName = printerDesc.mid(0, j < 0 ? i : j);
                if (printerName == QLatin1String("_default")) {
                    i = printerDesc.indexOf(
                        QRegExp(QLatin1String(": *use *=")));
                    while (printerDesc[i] != '=')
                        i++;
                    while (printerDesc[i] == '=' || printerDesc[i].isSpace())
                        i++;
                    j = i;
                    while (j < (int)printerDesc.length() &&
                            printerDesc[j] != ':' && printerDesc[j] != ',')
                        j++;
                    // that's our default printer
                    defaultPrinter =
                        qstrdup(printerDesc.mid(i, j-i).toAscii().data());
                    printerName = "";
                    printerDesc = "";
                } else if (printerName == QLatin1String("_all")) {
                    // skip it.. any other cases we want to skip?
                    printerName = "";
                    printerDesc = "";
                }

                if (j > 0) {
                    // try extracting a comment from the aliases
                    aliases = printerDesc.mid(j + 1, i - j - 1).split('|');
                    printerComment = QPrintDialog::tr("Aliases: %1")
                                     .arg(aliases.join(", "));
                }
                // look for signs of this being a remote printer
                i = printerDesc.indexOf(
                    QRegExp(QLatin1String(": *bsdaddr *=")));
                if (i >= 0) {
                    // point k at the end of remote host name
                    while (printerDesc[i] != '=')
                        i++;
                    while (printerDesc[i] == '=' || printerDesc[i].isSpace())
                        i++;
                    j = i;
                    while (j < (int)printerDesc.length() &&
                            printerDesc[j] != ':' && printerDesc[j] != ',')
                        j++;
                    // and stuff that into the string
                    printerHost = printerDesc.mid(i, j-i);
                    // maybe stick the remote printer name into the comment
                    if (printerDesc[j] == ',') {
                        i = ++j;
                        while (printerDesc[i].isSpace())
                            i++;
                        j = i;
                        while (j < (int)printerDesc.length() &&
                                printerDesc[j] != ':' && printerDesc[j] != ',')
                            j++;
                        if (printerName != printerDesc.mid(i, j-i)) {
                            printerComment =
                                QLatin1String("Remote name: ");
                            printerComment += printerDesc.mid(i, j-i);
                        }
                    }
                }
            }
            if (printerComment == ":")
                printerComment = ""; // for cups
            if (printerName.length())
                perhapsAddPrinter(printers, printerName, printerHost,
                                   printerComment, aliases);
            // chop away the line, for processing the next one
            printerDesc = "";
        }
    }
    delete[] line;
    return defaultPrinter;
}

#ifndef QT_NO_NIS

#if defined(Q_C_CALLBACKS)
extern "C" {
#endif

static int pd_foreach(int /*status */, char * /*key */, int /*keyLen */,
                    char *val, int valLen, char *data)
{
    parsePrinterDesc(QString::fromLatin1(val, valLen), (QList<QPrinterDescription> *)data);
    return 0;
}

#if defined(Q_C_CALLBACKS)
}
#endif

static int retrieveNisPrinters(QList<QPrinterDescription> *printers)
{
    typedef int (*WildCast)(int, char *, int, char *, int, char *);
    char printersConfByname[] = "printers.conf.byname";
    char *domain;
    int err;

    QLibrary lib("nsl");
    typedef int (*ypGetDefaultDomain)(char **);
    ypGetDefaultDomain _ypGetDefaultDomain = (ypGetDefaultDomain)lib.resolve("yp_get_default_domain");
    typedef int (*ypAll)(const char *, const char *, const struct ypall_callback *);
    ypAll _ypAll = (ypAll)lib.resolve("yp_all");

    if (_ypGetDefaultDomain && _ypAll) {
        err = _ypGetDefaultDomain(&domain);
        if (err == 0) {
            ypall_callback cb;
            // wild cast to support K&R-style system headers
            (WildCast &) cb.foreach = (WildCast) pd_foreach;
            cb.data = (char *) printers;
            err = _ypAll(domain, printersConfByname, &cb);
        }
        if (!err)
            return Success;
    }
    return Unavail;
}

#endif // QT_NO_NIS

static char *parseNsswitchPrintersEntry(QList<QPrinterDescription> *printers, char *line)
{
#define skipSpaces() \
    while (isspace((uchar) line[k])) \
        k++

    char *defaultPrinter = 0;
    bool stop = false;
    int lastStatus = NotFound;

    int k = 8;
    skipSpaces();
    if (line[k] != ':')
        return 0;
    k++;

    char *cp = strchr(line, '#');
    if (cp != 0)
        *cp = '\0';

    while (line[k] != '\0') {
        if (isspace((uchar) line[k])) {
            k++;
        } else if (line[k] == '[') {
            k++;
            skipSpaces();
            while (line[k] != '\0') {
                char status = tolower(line[k]);
                char action = '?';

                while (line[k] != '=' && line[k] != ']' && line[k] != '\0')
                    k++;
                if (line[k] == '=') {
                    k++;
                    skipSpaces();
                    action = tolower(line[k]);
                    while (line[k] != '\0' && !isspace((uchar) line[k]) && line[k] != ']')
                        k++;
                } else if (line[k] == ']') {
                    k++;
                    break;
                }
                skipSpaces();

                if (lastStatus == status)
                    stop = (action == (char) Return);
            }
        } else {
            if (stop)
                break;

            QByteArray source;
            while (!isspace((uchar) line[k]) && line[k] != '[') {
                source += line[k];
                k++;
            }

            if (source == "user") {
                lastStatus = parsePrintcap(printers,
                        QDir::homePath() + "/.printers");
            } else if (source == "files") {
                bool found;
                defaultPrinter = parsePrintersConf(printers, &found);
                if (found)
                    lastStatus = Success;
#ifndef QT_NO_NIS
            } else if (source == "nis") {
                lastStatus = retrieveNisPrinters(printers);
#endif
            } else {
                // nisplus, dns, etc., are not implemented yet
                lastStatus = NotFound;
            }
            stop = (lastStatus == Success);
        }
    }
    return defaultPrinter;
}

static char *parseNsswitchConf(QList<QPrinterDescription> *printers)
{
    QFile nc(QLatin1String("/etc/nsswitch.conf"));
    if (!nc.open(QIODevice::ReadOnly))
        return 0;

    char *defaultPrinter = 0;

    char *line = new char[1025];
    line[1024] = '\0';

    while (!nc.atEnd() &&
            nc.readLine(line, 1024) > 0) {
        if (strncmp(line, "printers", 8) == 0) {
            defaultPrinter = parseNsswitchPrintersEntry(printers, line);
            delete[] line;
            return defaultPrinter;
        }
    }

    strcpy(line, "printers: user files nis nisplus xfn");
    defaultPrinter = parseNsswitchPrintersEntry(printers, line);
    delete[] line;
    return defaultPrinter;
}

// HP-UX
static void parseEtcLpMember(QList<QPrinterDescription> *printers)
{
    QDir lp(QLatin1String("/etc/lp/member"));
    if (!lp.exists())
        return;
    QFileInfoList dirs = lp.entryInfoList();
    if (dirs.isEmpty())
        return;

    QString tmp;
    for (int i = 0; i < dirs.size(); ++i) {
        QFileInfo printer = dirs.at(i);
        // I haven't found any real documentation, so I'm guessing that
        // since lpstat uses /etc/lp/member rather than one of the
        // other directories, it's the one to use.  I did not find a
        // decent way to locate aliases and remote printers.
        if (printer.isFile())
            perhapsAddPrinter(printers, printer.fileName(),
                               QPrintDialog::tr("unknown"),
                               QLatin1String(""));
    }
}

// IRIX 6.x
static void parseSpoolInterface(QList<QPrinterDescription> *printers)
{
    QDir lp(QLatin1String("/usr/spool/lp/interface"));
    if (!lp.exists())
        return;
    QFileInfoList files = lp.entryInfoList();
    if(files.isEmpty())
        return;

    for (int i = 0; i < files.size(); ++i) {
        QFileInfo printer = files.at(i);

        if (!printer.isFile())
            continue;

        // parse out some information
        QFile configFile(printer.filePath());
        if (!configFile.open(QIODevice::ReadOnly))
            continue;

        QByteArray line;
        line.resize(1025);
        QString namePrinter;
        QString hostName;
        QString hostPrinter;
        QString printerType;

        QString nameKey(QLatin1String("NAME="));
        QString typeKey(QLatin1String("TYPE="));
        QString hostKey(QLatin1String("HOSTNAME="));
        QString hostPrinterKey(QLatin1String("HOSTPRINTER="));

        while (!configFile.atEnd() &&
                (configFile.readLine(line.data(), 1024)) > 0) {
            QString uline = line;
            if (uline.startsWith(typeKey) ) {
                printerType = line.mid(nameKey.length());
                printerType = printerType.simplified();
            } else if (uline.startsWith(hostKey)) {
                hostName = line.mid(hostKey.length());
                hostName = hostName.simplified();
            } else if (uline.startsWith(hostPrinterKey)) {
                hostPrinter = line.mid(hostPrinterKey.length());
                hostPrinter = hostPrinter.simplified();
            } else if (uline.startsWith(nameKey)) {
                namePrinter = line.mid(nameKey.length());
                namePrinter = namePrinter.simplified();
            }
        }
        configFile.close();

        printerType = printerType.trimmed();
        if (printerType.indexOf("postscript", 0, Qt::CaseInsensitive) < 0)
            continue;

        int ii = 0;
        while ((ii = namePrinter.indexOf('"', ii)) >= 0)
            namePrinter.remove(ii, 1);

        if (hostName.isEmpty() || hostPrinter.isEmpty()) {
            perhapsAddPrinter(printers, printer.fileName(),
                               QLatin1String(""), namePrinter);
        } else {
            QString comment;
            comment = namePrinter;
            comment += " (";
            comment += hostPrinter;
            comment += ")";
            perhapsAddPrinter(printers, printer.fileName(),
                               hostName, comment);
        }
    }
}


// Every unix must have its own.  It's a standard.  Here is AIX.
static void parseQconfig(QList<QPrinterDescription> *printers)
{
    QFile qconfig(QLatin1String("/etc/qconfig"));
    if (!qconfig.open(QIODevice::ReadOnly))
        return;

    QTextStream ts(&qconfig);
    QString line;

    QString stanzaName; // either a queue or a device name
    bool up = true; // queue up?  default true, can be false
    QString remoteHost; // null if local
    QString deviceName; // null if remote

    QRegExp newStanza(QLatin1String("^[0-z\\-]*:$"));

    // our basic strategy here is to process each line, detecting new
    // stanzas.  each time we see a new stanza, we check if the
    // previous stanza was a valid queue for a) a remote printer or b)
    // a local printer.  if it wasn't, we assume that what we see is
    // the start of the first stanza, or that the previous stanza was
    // a device stanza, or that there is some syntax error (we don't
    // report those).

    do {
        line = ts.readLine();
        bool indented = line[0].isSpace();
        line = line.simplified();

        int i = line.indexOf('=');
        if (indented && i != -1) { // line in stanza
            QString variable = line.left(i).simplified();
            QString value=line.mid(i+1, line.length()).simplified();
            if (variable == QLatin1String("device"))
                deviceName = value;
            else if (variable == QLatin1String("host"))
                remoteHost = value;
            else if (variable == QLatin1String("up"))
                up = !(value.toLower() == QLatin1String("false"));
        } else if (line[0] == '*') { // comment
            // nothing to do
        } else if (ts.atEnd() || // end of file, or beginning of new stanza
                    (!indented && line.contains(newStanza))) {
            if (up && stanzaName.length() > 0 && stanzaName.length() < 21) {
                if (remoteHost.length()) // remote printer
                    perhapsAddPrinter(printers, stanzaName, remoteHost,