File indexing completed on 2024-06-16 03:54:32

 /*
     SPDX-FileCopyrightText: 2010 Rafael Fernández López <ereslibre@kde.org>
     SPDX-FileCopyrightText: 2010 Lukas Tinkl <ltinkl@redhat.com>
     SPDX-FileCopyrightText: 2011 Matej Laitl <matej@laitl.cz>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "udevportablemediaplayer.h"
 
 #include <QChar>
 #include <QDebug>
 #include <QFile>
 #include <QTextStream>
 #include <qstandardpaths.h>
 
 using namespace Solid::Backends::UDev;
 
 /**
  * Reads one value from media-player-info ini-like file.
  *
  * @param file file to open. May advance current seek position
  * @param group group name to read from, e.g. "Device" for [Device] group
  * @param key key name, e.g. "AccessProtocol"
  * @return value as a string or an empty string
  */
 static QString readMpiValue(QIODevice &file, const QString &group, const QString &key)
 {
     QTextStream mpiStream(&file);
     QString line;
     QString currGroup;
 
     while (!mpiStream.atEnd()) {
         line = mpiStream.readLine().trimmed(); // trimmed is needed for possible indentation
         if (line.isEmpty() || line.startsWith(QChar(';'))) {
             // skip empty and comment lines
         } else if (line.startsWith(QChar('[')) && line.endsWith(QChar(']'))) {
             currGroup = line.mid(1, line.length() - 2); // strip [ and ]
         } else if (line.indexOf(QChar('=')) != -1) {
             int index = line.indexOf(QChar('='));
             if (currGroup == group && line.left(index) == key) {
                 line = line.right(line.length() - index - 1);
                 if (line.startsWith(QChar('"')) && line.endsWith(QChar('"'))) {
                     line = line.mid(1, line.length() - 2); // strip enclosing double quotes
                 }
                 return line;
             }
         } else {
             qWarning() << "readMpiValue: cannot parse line:" << line;
         }
     }
     return QString();
 }
 
 PortableMediaPlayer::PortableMediaPlayer(UDevDevice *device)
     : DeviceInterface(device)
 {
 }
 
 PortableMediaPlayer::~PortableMediaPlayer()
 {
 }
 
 QStringList PortableMediaPlayer::supportedProtocols() const
 {
     /* There are multiple packages that set ID_MEDIA_PLAYER:
      *  * gphoto2 sets it to numeric 1 (for _some_ cameras it supports) and it hopefully
      *    means MTP-compatible device.
      *  * libmtp >= 1.0.4 sets it to numeric 1 and this always denotes MTP-compatible player.
      *  * media-player-info sets it to a string that denotes a name of the .mpi file with
      *    additional info.
      */
     if (m_device->property("ID_MEDIA_PLAYER").toInt() == 1) {
         return QStringList() << "mtp";
     }
 
     QString mpiFileName = mediaPlayerInfoFilePath();
     if (mpiFileName.isEmpty()) {
         return QStringList();
     }
     // we unfornutately cannot use QSettings as it cannot read unquoted valued with semicolons in it
     QFile mpiFile(mpiFileName);
     if (!mpiFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
         qWarning() << "Cannot open" << mpiFileName << "for reading."
                    << "Check your media-player-info installation.";
         return QStringList();
     }
     QString value = readMpiValue(mpiFile, QString("Device"), QString("AccessProtocol"));
     return value.split(QChar(';'), Qt::SkipEmptyParts);
 }
 
 QStringList PortableMediaPlayer::supportedDrivers(QString protocol) const
 {
     Q_UNUSED(protocol)
     QStringList res;
 
     if (!supportedProtocols().isEmpty()) {
         res << "usb";
     }
     if (m_device->property("USBMUX_SUPPORTED").toBool() == true) {
         res << "usbmux";
     }
     return res;
 }
 
 QVariant PortableMediaPlayer::driverHandle(const QString &driver) const
 {
     if (driver == "mtp" || driver == "usbmux") {
         return m_device->property("ID_SERIAL_SHORT");
     }
 
     return QVariant();
 }
 
 QString PortableMediaPlayer::mediaPlayerInfoFilePath() const
 {
     QString relativeFilename = m_device->property("ID_MEDIA_PLAYER").toString();
     if (relativeFilename.isEmpty()) {
         qWarning() << "We attached PortableMediaPlayer interface to device" << m_device->udi() << "but m_device->property(\"ID_MEDIA_PLAYER\") is empty???";
         return QString();
     }
     relativeFilename.prepend("media-player-info/");
     relativeFilename.append(".mpi");
     QString filename = QStandardPaths::locate(QStandardPaths::GenericDataLocation, relativeFilename);
     if (filename.isEmpty()) {
         qWarning() << "media player info file" << relativeFilename << "not found under user and"
                    << "system XDG data directories. Do you have media-player-info installed?";
     }
     return filename;
 }
 
 #include "moc_udevportablemediaplayer.cpp"