Split utilities functions into separate files

src/utilities/colorutils.cpp

@@ -0,0 +1,41 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QColor>
+
+#include "colorutils.h"
+
+namespace Utilities {
+
+QString ColorToRgba(const QColor &c) {
+
+  return QString("rgba(%1, %2, %3, %4)")
+      .arg(c.red())
+      .arg(c.green())
+      .arg(c.blue())
+      .arg(c.alpha());
+
+}
+
+bool IsColorDark(const QColor &color) {
+  return ((30 * color.red() + 59 * color.green() + 11 * color.blue()) / 100) <= 130;
+}
+
+}  // namespace Utilities

src/utilities/colorutils.h

@@ -0,0 +1,33 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef COLORUTILS_H
+#define COLORUTILS_H
+
+#include <QString>
+#include <QColor>
+
+namespace Utilities {
+
+QString ColorToRgba(const QColor &color);
+bool IsColorDark(const QColor &color);
+
+}  // namespace Utilities
+
+#endif  // COLORUTILS_H

src/utilities/cryptutils.cpp

@@ -0,0 +1,75 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QByteArray>
+#include <QString>
+#include <QCryptographicHash>
+
+#include "cryptutils.h"
+
+namespace Utilities {
+
+QByteArray Hmac(const QByteArray &key, const QByteArray &data, const QCryptographicHash::Algorithm method) {
+
+  constexpr int block_size = 64;
+  Q_ASSERT(key.length() <= block_size);
+
+  QByteArray inner_padding(block_size, static_cast<char>(0x36));
+  QByteArray outer_padding(block_size, static_cast<char>(0x5c));
+
+  for (int i = 0; i < key.length(); ++i) {
+    inner_padding[i] = static_cast<char>(inner_padding[i] ^ key[i]);
+    outer_padding[i] = static_cast<char>(outer_padding[i] ^ key[i]);
+  }
+
+  QByteArray part;
+  part.append(inner_padding);
+  part.append(data);
+
+  QByteArray total;
+  total.append(outer_padding);
+  total.append(QCryptographicHash::hash(part, method));
+
+  return QCryptographicHash::hash(total, method);
+
+}
+
+QByteArray HmacSha256(const QByteArray &key, const QByteArray &data) {
+  return Hmac(key, data, QCryptographicHash::Sha256);
+}
+
+QByteArray HmacMd5(const QByteArray &key, const QByteArray &data) {
+  return Hmac(key, data, QCryptographicHash::Md5);
+}
+
+QByteArray HmacSha1(const QByteArray &key, const QByteArray &data) {
+  return Hmac(key, data, QCryptographicHash::Sha1);
+}
+
+QByteArray Sha1CoverHash(const QString &artist, const QString &album) {
+
+  QCryptographicHash hash(QCryptographicHash::Sha1);
+  hash.addData(artist.toLower().toUtf8());
+  hash.addData(album.toLower().toUtf8());
+
+  return hash.result();
+
+}
+
+}  // namespace Utilities

src/utilities/cryptutils.h

@@ -0,0 +1,37 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef CRYPTUTILS_H
+#define CRYPTUTILS_H
+
+#include <QByteArray>
+#include <QString>
+#include <QCryptographicHash>
+
+namespace Utilities {
+
+QByteArray Hmac(const QByteArray &key, const QByteArray &data, const QCryptographicHash::Algorithm method);
+QByteArray HmacMd5(const QByteArray &key, const QByteArray &data);
+QByteArray HmacSha256(const QByteArray &key, const QByteArray &data);
+QByteArray HmacSha1(const QByteArray &key, const QByteArray &data);
+QByteArray Sha1CoverHash(const QString &artist, const QString &album);
+
+}  // namespace Utilities
+
+#endif  // CRYPTUTILS_H

src/utilities/diskutils.cpp

@@ -0,0 +1,76 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+
+#ifdef Q_OS_UNIX
+#  include <sys/statvfs.h>
+#endif
+
+#ifdef Q_OS_WIN
+#  include <windows.h>
+#endif
+
+#include <QString>
+#include <QDir>
+
+#include "diskutils.h"
+
+#ifdef Q_OS_WIN32
+#  include "core/scopedwchararray.h"
+#endif
+
+namespace Utilities {
+
+quint64 FileSystemCapacity(const QString &path) {
+
+#if defined(Q_OS_UNIX)
+  struct statvfs fs_info {};
+  if (statvfs(path.toLocal8Bit().constData(), &fs_info) == 0)
+    return static_cast<quint64>(fs_info.f_blocks) * static_cast<quint64>(fs_info.f_bsize);
+#elif defined(Q_OS_WIN32)
+  _ULARGE_INTEGER ret;
+  ScopedWCharArray wchar(QDir::toNativeSeparators(path));
+  if (GetDiskFreeSpaceEx(wchar.get(), nullptr, &ret, nullptr) != 0)
+    return ret.QuadPart;
+#endif
+
+  return 0;
+
+}
+
+quint64 FileSystemFreeSpace(const QString &path) {
+
+#if defined(Q_OS_UNIX)
+  struct statvfs fs_info {};
+  if (statvfs(path.toLocal8Bit().constData(), &fs_info) == 0)
+    return static_cast<quint64>(fs_info.f_bavail) * static_cast<quint64>(fs_info.f_bsize);
+#elif defined(Q_OS_WIN32)
+  _ULARGE_INTEGER ret;
+  ScopedWCharArray wchar(QDir::toNativeSeparators(path));
+  if (GetDiskFreeSpaceEx(wchar.get(), &ret, nullptr, nullptr) != 0)
+    return ret.QuadPart;
+#endif
+
+  return 0;
+
+}
+
+}  // namespace Utilities

src/utilities/diskutils.h

@@ -0,0 +1,33 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DISKUTILS_H
+#define DISKUTILS_H
+
+#include <QString>
+
+namespace Utilities {
+
+quint64 FileSystemCapacity(const QString &path);
+quint64 FileSystemFreeSpace(const QString &path);
+
+}  // namespace Utilities
+
+#endif  // DISKUTILS_H

src/utilities/envutils.cpp

@@ -0,0 +1,73 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <cstdlib>
+
+#include <QtGlobal>
+#include <QByteArray>
+#include <QString>
+#include <QSettings>
+
+#include "envutils.h"
+
+namespace Utilities {
+
+QString GetEnv(const QString &key) {
+  const QByteArray key_data = key.toLocal8Bit();
+  return QString::fromLocal8Bit(qgetenv(key_data.constData()));
+}
+
+void SetEnv(const char *key, const QString &value) {
+
+#ifdef Q_OS_WIN32
+  _putenv(QString("%1=%2").arg(key, value).toLocal8Bit().constData());
+#else
+  setenv(key, value.toLocal8Bit().constData(), 1);
+#endif
+
+}
+
+QString DesktopEnvironment() {
+
+  const QString de = GetEnv("XDG_CURRENT_DESKTOP");
+  if (!de.isEmpty()) return de;
+
+  if (!qEnvironmentVariableIsEmpty("KDE_FULL_SESSION"))         return "KDE";
+  if (!qEnvironmentVariableIsEmpty("GNOME_DESKTOP_SESSION_ID")) return "Gnome";
+
+  QString session = GetEnv("DESKTOP_SESSION");
+  qint64 slash = session.lastIndexOf('/');
+  if (slash != -1) {
+    QSettings desktop_file(QString(session + ".desktop"), QSettings::IniFormat);
+    desktop_file.beginGroup("Desktop Entry");
+    QString name = desktop_file.value("DesktopNames").toString();
+    desktop_file.endGroup();
+    if (!name.isEmpty()) return name;
+    session = session.mid(slash + 1);
+  }
+
+  if (session == "kde")           return "KDE";
+  else if (session == "gnome")    return "Gnome";
+  else if (session == "xfce")     return "XFCE";
+
+  return "Unknown";
+
+}
+
+}  // namespace Utilities

src/utilities/envutils.h

@@ -0,0 +1,33 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef ENVUTILS_H
+#define ENVUTILS_H
+
+#include <QString>
+
+namespace Utilities {
+
+QString GetEnv(const QString &key);
+void SetEnv(const char *key, const QString &value);
+QString DesktopEnvironment();
+
+}  // namespace Utilities
+
+#endif  // ENVUTILS_H

src/utilities/filemanagerutils.cpp

@@ -0,0 +1,167 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QObject>
+#include <QList>
+#include <QMap>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QRegularExpression>
+#include <QFile>
+#include <QFileInfo>
+#include <QDir>
+#include <QSettings>
+#include <QProcess>
+#include <QDesktopServices>
+#include <QMessageBox>
+
+#include "filemanagerutils.h"
+
+namespace Utilities {
+
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
+void OpenInFileManager(const QString &path, const QUrl &url);
+void OpenInFileManager(const QString &path, const QUrl &url) {
+
+  if (!url.isLocalFile()) return;
+
+  QProcess proc;
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+  proc.startCommand("xdg-mime query default inode/directory");
+#else
+  proc.start("xdg-mime", QStringList() << "query" << "default" << "inode/directory");
+#endif
+  proc.waitForFinished();
+  QString desktop_file = proc.readLine().simplified();
+  QStringList data_dirs = QString(qgetenv("XDG_DATA_DIRS")).split(":");
+
+  QString command;
+  QStringList command_params;
+  for (const QString &data_dir : data_dirs) {
+    QString desktop_file_path = QString("%1/applications/%2").arg(data_dir, desktop_file);
+    if (!QFile::exists(desktop_file_path)) continue;
+    QSettings setting(desktop_file_path, QSettings::IniFormat);
+    setting.beginGroup("Desktop Entry");
+    if (setting.contains("Exec")) {
+      QString cmd = setting.value("Exec").toString();
+      if (cmd.isEmpty()) break;
+      cmd = cmd.remove(QRegularExpression("[%][a-zA-Z]*( |$)", QRegularExpression::CaseInsensitiveOption));
+#  if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
+      command_params = cmd.split(' ', Qt::SkipEmptyParts);
+#  else
+      command_params = cmd.split(' ', QString::SkipEmptyParts);
+#  endif
+      command = command_params.first();
+      command_params.removeFirst();
+    }
+    setting.endGroup();
+    if (!command.isEmpty()) break;
+  }
+
+  if (command.startsWith("/usr/bin/")) {
+    command = command.split("/").last();
+  }
+
+  if (command.isEmpty() || command == "exo-open") {
+    QDesktopServices::openUrl(QUrl::fromLocalFile(path));
+  }
+  else if (command.startsWith("nautilus")) {
+    proc.startDetached(command, QStringList() << command_params << "--select" << url.toLocalFile());
+  }
+  else if (command.startsWith("dolphin") || command.startsWith("konqueror") || command.startsWith("kfmclient")) {
+    proc.startDetached(command, QStringList() << command_params << "--select" << "--new-window" << url.toLocalFile());
+  }
+  else if (command.startsWith("caja")) {
+    proc.startDetached(command, QStringList() << command_params << "--no-desktop" << path);
+  }
+  else if (command.startsWith("pcmanfm") || command.startsWith("thunar") || command.startsWith("spacefm")) {
+    proc.startDetached(command, QStringList() << command_params << path);
+  }
+  else {
+    proc.startDetached(command, QStringList() << command_params << url.toLocalFile());
+  }
+
+}
+#endif
+
+#ifdef Q_OS_MACOS
+// Better than openUrl(dirname(path)) - also highlights file at path
+void RevealFileInFinder(const QString &path) {
+  QProcess::execute("/usr/bin/open", QStringList() << "-R" << path);
+}
+#endif  // Q_OS_MACOS
+
+#ifdef Q_OS_WIN
+void ShowFileInExplorer(const QString &path);
+void ShowFileInExplorer(const QString &path) {
+  QProcess::execute("explorer.exe", QStringList() << "/select," << QDir::toNativeSeparators(path));
+}
+#endif
+
+void OpenInFileBrowser(const QList<QUrl> &urls) {
+
+  QMap<QString, QUrl> dirs;
+
+  for (const QUrl &url : urls) {
+    if (!url.isLocalFile()) {
+      continue;
+    }
+    QString path = url.toLocalFile();
+    if (!QFile::exists(path)) continue;
+
+    const QString directory = QFileInfo(path).dir().path();
+    if (dirs.contains(directory)) continue;
+    dirs.insert(directory, url);
+  }
+
+  if (dirs.count() > 50) {
+    QMessageBox messagebox(QMessageBox::Critical, QObject::tr("Show in file browser"), QObject::tr("Too many songs selected."));
+    messagebox.exec();
+    return;
+  }
+
+  if (dirs.count() > 5) {
+    QMessageBox messagebox(QMessageBox::Information, QObject::tr("Show in file browser"), QObject::tr("%1 songs in %2 different directories selected, are you sure you want to open them all?").arg(urls.count()).arg(dirs.count()), QMessageBox::Open|QMessageBox::Cancel);
+    messagebox.setTextFormat(Qt::RichText);
+    int result = messagebox.exec();
+    switch (result) {
+      case QMessageBox::Open:
+        break;
+      case QMessageBox::Cancel:
+      default:
+        return;
+    }
+  }
+
+  QMap<QString, QUrl>::iterator i;
+  for (i = dirs.begin(); i != dirs.end(); ++i) {
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
+    OpenInFileManager(i.key(), i.value());
+#elif defined(Q_OS_MACOS)
+    // Revealing multiple files in the finder only opens one window, so it also makes sense to reveal at most one per directory
+    RevealFileInFinder(i.value().toLocalFile());
+#elif defined(Q_OS_WIN32)
+    ShowFileInExplorer(i.value().toLocalFile());
+#endif
+  }
+
+}
+
+}

src/utilities/filemanagerutils.h

@@ -0,0 +1,32 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef FILEMANAGERUTILS_H
+#define FILEMANAGERUTILS_H
+
+#include <QList>
+#include <QUrl>
+
+namespace Utilities {
+
+void OpenInFileBrowser(const QList<QUrl> &urls);
+
+}  // namespace Utilities
+
+#endif  // FILEMANAGERUTILS_H

src/utilities/fileutils.cpp

@@ -0,0 +1,127 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <memory>
+
+#include <QtGlobal>
+
+#include <QByteArray>
+#include <QString>
+#include <QIODevice>
+#include <QDir>
+#include <QFile>
+
+#include "core/logging.h"
+
+#include "fileutils.h"
+
+namespace Utilities {
+
+QByteArray ReadDataFromFile(const QString &filename) {
+
+  QFile file(filename);
+  QByteArray data;
+  if (file.open(QIODevice::ReadOnly)) {
+    data = file.readAll();
+    file.close();
+  }
+  else {
+    qLog(Error) << "Failed to open file" << filename << "for reading:" << file.errorString();
+  }
+  return data;
+
+}
+
+bool Copy(QIODevice *source, QIODevice *destination) {
+
+  if (!source->open(QIODevice::ReadOnly)) return false;
+
+  if (!destination->open(QIODevice::WriteOnly)) return false;
+
+  const qint64 bytes = source->size();
+  std::unique_ptr<char[]> data(new char[bytes]);
+  qint64 pos = 0;
+
+  qint64 bytes_read = 0;
+  do {
+    bytes_read = source->read(data.get() + pos, bytes - pos);
+    if (bytes_read == -1) return false;
+
+    pos += bytes_read;
+  } while (bytes_read > 0 && pos != bytes);
+
+  pos = 0;
+  qint64 bytes_written = 0;
+  do {
+    bytes_written = destination->write(data.get() + pos, bytes - pos);
+    if (bytes_written == -1) return false;
+
+    pos += bytes_written;
+  } while (bytes_written > 0 && pos != bytes);
+
+  return true;
+
+}
+
+bool CopyRecursive(const QString &source, const QString &destination) {
+
+  // Make the destination directory
+  QString dir_name = source.section('/', -1, -1);
+  QString dest_path = destination + "/" + dir_name;
+  QDir().mkpath(dest_path);
+
+  QDir dir(source);
+  for (const QString &child : dir.entryList(QDir::NoDotAndDotDot | QDir::Dirs)) {
+    if (!CopyRecursive(source + "/" + child, dest_path)) {
+      qLog(Warning) << "Failed to copy dir" << source + "/" + child << "to" << dest_path;
+      return false;
+    }
+  }
+
+  for (const QString &child : dir.entryList(QDir::NoDotAndDotDot | QDir::Files)) {
+    if (!QFile::copy(source + "/" + child, dest_path + "/" + child)) {
+      qLog(Warning) << "Failed to copy file" << source + "/" + child << "to" << dest_path;
+      return false;
+    }
+  }
+  return true;
+
+}
+
+bool RemoveRecursive(const QString &path) {
+
+  QDir dir(path);
+  for (const QString &child : dir.entryList(QDir::NoDotAndDotDot | QDir::Dirs | QDir::Hidden)) {
+    if (!RemoveRecursive(path + "/" + child)) {
+      return false;
+    }
+  }
+
+  for (const QString &child : dir.entryList(QDir::NoDotAndDotDot | QDir::Files | QDir::Hidden)) {
+    if (!QFile::remove(path + "/" + child)) {
+      return false;
+    }
+  }
+
+  return dir.rmdir(path);
+
+}
+
+}  // namespace Utilities

src/utilities/fileutils.h

@@ -0,0 +1,37 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef FILEUTILS_H
+#define FILEUTILS_H
+
+#include <QString>
+
+class QIODevice;
+
+namespace Utilities {
+
+QByteArray ReadDataFromFile(const QString &filename);
+bool Copy(QIODevice *source, QIODevice *destination);
+bool CopyRecursive(const QString &source, const QString &destination);
+bool RemoveRecursive(const QString &path);
+
+}  // namespace Utilities
+
+#endif  // FILEUTILS_H

src/utilities/imageutils.cpp

@@ -0,0 +1,210 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QList>
+#include <QBuffer>
+#include <QByteArray>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QImage>
+#include <QImageReader>
+#include <QPixmap>
+#include <QPainter>
+#include <QSize>
+
+#include "imageutils.h"
+#include "fileutils.h"
+#include "mimeutils.h"
+#include "core/tagreaderclient.h"
+
+QStringList ImageUtils::kSupportedImageMimeTypes;
+QStringList ImageUtils::kSupportedImageFormats;
+
+QStringList ImageUtils::SupportedImageMimeTypes() {
+
+  if (kSupportedImageMimeTypes.isEmpty()) {
+    for (const QByteArray &mimetype : QImageReader::supportedMimeTypes()) {
+      kSupportedImageMimeTypes << mimetype;
+    }
+  }
+
+  return kSupportedImageMimeTypes;
+
+}
+
+QStringList ImageUtils::SupportedImageFormats() {
+
+  if (kSupportedImageFormats.isEmpty()) {
+    for (const QByteArray &filetype : QImageReader::supportedImageFormats()) {
+      kSupportedImageFormats << filetype;
+    }
+  }
+
+  return kSupportedImageFormats;
+
+}
+
+QList<QByteArray> ImageUtils::ImageFormatsForMimeType(const QByteArray &mimetype) {
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
+  return QImageReader::imageFormatsForMimeType(mimetype);
+#else
+  if (mimetype == "image/bmp") return QList<QByteArray>() << "BMP";
+  else if (mimetype == "image/gif") return QList<QByteArray>() << "GIF";
+  else if (mimetype == "image/jpeg") return QList<QByteArray>() << "JPG";
+  else if (mimetype == "image/png") return QList<QByteArray>() << "PNG";
+  else return QList<QByteArray>();
+#endif
+
+}
+
+QPixmap ImageUtils::TryLoadPixmap(const QUrl &art_automatic, const QUrl &art_manual, const QUrl &url) {
+
+  QPixmap ret;
+
+  if (!art_manual.path().isEmpty()) {
+    if (art_manual.path() == Song::kManuallyUnsetCover) return ret;
+    else if (art_manual.isLocalFile()) {
+      ret.load(art_manual.toLocalFile());
+    }
+    else if (art_manual.scheme().isEmpty()) {
+      ret.load(art_manual.path());
+    }
+  }
+  if (ret.isNull() && !art_automatic.path().isEmpty()) {
+    if (art_automatic.path() == Song::kEmbeddedCover && !url.isEmpty() && url.isLocalFile()) {
+      ret = QPixmap::fromImage(TagReaderClient::Instance()->LoadEmbeddedArtAsImageBlocking(url.toLocalFile()));
+    }
+    else if (art_automatic.isLocalFile()) {
+      ret.load(art_automatic.toLocalFile());
+    }
+    else if (art_automatic.scheme().isEmpty()) {
+      ret.load(art_automatic.path());
+    }
+  }
+
+  return ret;
+
+}
+
+QByteArray ImageUtils::SaveImageToJpegData(const QImage &image) {
+
+  if (image.isNull()) return QByteArray();
+
+  QByteArray image_data;
+  QBuffer buffer(&image_data);
+  if (buffer.open(QIODevice::WriteOnly)) {
+    image.save(&buffer, "JPEG");
+    buffer.close();
+  }
+
+  return image_data;
+
+}
+
+QByteArray ImageUtils::FileToJpegData(const QString &filename) {
+
+  if (filename.isEmpty()) return QByteArray();
+
+  QByteArray image_data = Utilities::ReadDataFromFile(filename);
+  if (Utilities::MimeTypeFromData(image_data) == "image/jpeg") return image_data;
+  else {
+    QImage image;
+    if (image.loadFromData(image_data)) {
+      if (!image.isNull()) {
+        image_data = SaveImageToJpegData(image);
+      }
+    }
+  }
+
+  return image_data;
+
+}
+
+QImage ImageUtils::ScaleAndPad(const QImage &image, const bool scale, const bool pad, const int desired_height) {
+
+  if (image.isNull()) return image;
+
+  // Scale the image down
+  QImage image_scaled;
+  if (scale) {
+    image_scaled = image.scaled(QSize(desired_height, desired_height), Qt::KeepAspectRatio, Qt::SmoothTransformation);
+  }
+  else {
+    image_scaled = image;
+  }
+
+  // Pad the image to height x height
+  if (pad) {
+    QImage image_padded(desired_height, desired_height, QImage::Format_ARGB32);
+    image_padded.fill(0);
+
+    QPainter p(&image_padded);
+    p.drawImage((desired_height - image_scaled.width()) / 2, (desired_height - image_scaled.height()) / 2, image_scaled);
+    p.end();
+
+    image_scaled = image_padded;
+  }
+
+  return image_scaled;
+
+}
+
+QImage ImageUtils::CreateThumbnail(const QImage &image, const bool pad, const QSize size) {
+
+  if (image.isNull()) return image;
+
+  QImage image_thumbnail;
+  if (pad) {
+    image_thumbnail = image.scaled(size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    QImage image_padded(size, QImage::Format_ARGB32_Premultiplied);
+    image_padded.fill(0);
+
+    QPainter p(&image_padded);
+    p.drawImage((image_padded.width() - image_thumbnail.width()) / 2, (image_padded.height() - image_thumbnail.height()) / 2, image_thumbnail);
+    p.end();
+
+    image_thumbnail = image_padded;
+  }
+  else {
+    image_thumbnail = image.scaledToHeight(size.height(), Qt::SmoothTransformation);
+  }
+
+  return image_thumbnail;
+
+}
+
+QImage ImageUtils::GenerateNoCoverImage(const QSize size) {
+
+  QImage image(":/pictures/cdcase.png");
+
+  // Get a square version of the nocover image with some transparency:
+  QImage image_scaled = image.scaled(size, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+
+  QImage image_square(size, QImage::Format_ARGB32);
+  image_square.fill(0);
+  QPainter p(&image_square);
+  p.setOpacity(0.4);
+  p.drawImage((size.width() - image_scaled.width()) / 2, (size.height() - image_scaled.height()) / 2, image_scaled);
+  p.end();
+
+  return image_square;
+
+}

src/utilities/imageutils.h

@@ -0,0 +1,50 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef IMAGEUTILS_H
+#define IMAGEUTILS_H
+
+#include <QList>
+#include <QByteArray>
+#include <QString>
+#include <QStringList>
+#include <QUrl>
+#include <QImage>
+#include <QPixmap>
+
+class ImageUtils {
+
+ private:
+  static QStringList kSupportedImageMimeTypes;
+  static QStringList kSupportedImageFormats;
+
+ public:
+  static QStringList SupportedImageMimeTypes();
+  static QStringList SupportedImageFormats();
+  static QList<QByteArray> ImageFormatsForMimeType(const QByteArray &mimetype);
+  static QByteArray SaveImageToJpegData(const QImage &image = QImage());
+  static QByteArray FileToJpegData(const QString &filename);
+  static QPixmap TryLoadPixmap(const QUrl &automatic, const QUrl &manual, const QUrl &url = QUrl());
+  static QImage ScaleAndPad(const QImage &image, const bool scale, const bool pad, const int desired_height);
+  static QImage CreateThumbnail(const QImage &image, const bool pad, const QSize size);
+  static QImage GenerateNoCoverImage(const QSize size = QSize());
+
+};
+
+#endif  // IMAGEUTILS_H

src/utilities/macaddrutils.cpp

@@ -0,0 +1,54 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+#include <QString>
+#include <QNetworkInterface>
+
+#include "macaddrutils.h"
+
+namespace Utilities {
+
+QString MacAddress() {
+
+  QString ret;
+
+  for (QNetworkInterface &netif : QNetworkInterface::allInterfaces()) {
+    if (
+        (netif.hardwareAddress() == "00:00:00:00:00:00") ||
+        (netif.flags() & QNetworkInterface::IsLoopBack) ||
+        !(netif.flags() & QNetworkInterface::IsUp) ||
+        !(netif.flags() & QNetworkInterface::IsRunning)
+        ) { continue; }
+    if (ret.isEmpty()
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
+        || netif.type() == QNetworkInterface::Ethernet || netif.type() == QNetworkInterface::Wifi
+#endif
+    ) {
+      ret = netif.hardwareAddress();
+    }
+  }
+
+  if (ret.isEmpty()) ret = "00:00:00:00:00:00";
+
+  return ret;
+
+}
+
+}  // namespace Utilities

src/utilities/macaddrutils.h

@@ -0,0 +1,31 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef MACADDRUTILS_H
+#define MACADDRUTILS_H
+
+#include <QString>
+
+namespace Utilities {
+
+QString MacAddress();
+
+}  // namespace Utilities
+
+#endif  // MACADDRUTILS_H

src/utilities/macosutils.h

@@ -0,0 +1,32 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2011, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef MACOSUTILS_H
+#define MACOSUTILS_H
+
+namespace Utilities {
+
+qint32 GetMacOsVersion();
+void IncreaseFDLimit();
+
+}  // namespace Utilities
+
+#endif  // MACOSUTILS_H

src/utilities/macosutils.mm

@@ -0,0 +1,62 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <sys/resource.h>
+
+#import <Foundation/Foundation.h>
+#import <Foundation/NSProcessInfo.h>
+
+#include "macosutils.h"
+
+#include "core/logging.h"
+
+namespace Utilities {
+
+qint32 GetMacOsVersion() {
+
+  NSOperatingSystemVersion version = [ [NSProcessInfo processInfo] operatingSystemVersion];
+  return version.minorVersion;
+
+}
+
+void IncreaseFDLimit() {
+
+  // Bump the soft limit for the number of file descriptors from the default of 256 to the maximum (usually 10240).
+  struct rlimit limit;
+  getrlimit(RLIMIT_NOFILE, &limit);
+
+  // getrlimit() lies about the hard limit so we have to check sysctl.
+  int max_fd = 0;
+  size_t len = sizeof(max_fd);
+  sysctlbyname("kern.maxfilesperproc", &max_fd, &len, nullptr, 0);
+
+  limit.rlim_cur = max_fd;
+  int ret = setrlimit(RLIMIT_NOFILE, &limit);
+
+  if (ret == 0) {
+    qLog(Debug) << "Max fd:" << max_fd;
+  }
+
+}
+
+}  // namespace Utilities

src/utilities/mimeutils.cpp

@@ -0,0 +1,36 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QByteArray>
+#include <QString>
+#include <QMimeDatabase>
+
+#include "mimeutils.h"
+
+namespace Utilities {
+
+QString MimeTypeFromData(const QByteArray &data) {
+
+  if (data.isEmpty()) return QString();
+
+  return QMimeDatabase().mimeTypeForData(data).name();
+
+}
+
+}  // namespace Utilities

src/utilities/mimeutils.h

@@ -0,0 +1,32 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef MIMEUTILS_H
+#define MIMEUTILS_H
+
+#include <QByteArray>
+#include <QString>
+
+namespace Utilities {
+
+QString MimeTypeFromData(const QByteArray &data);
+
+} //  namespace Utilities
+
+#endif  // MIMEUTILS_H

src/utilities/randutils.cpp

@@ -0,0 +1,63 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QChar>
+
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+#  include <QRandomGenerator>
+#endif
+
+#include "randutils.h"
+
+namespace Utilities {
+
+QString GetRandomStringWithChars(const int len) {
+  const QString UseCharacters("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
+  return GetRandomString(len, UseCharacters);
+}
+
+QString GetRandomStringWithCharsAndNumbers(const int len) {
+  const QString UseCharacters("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
+  return GetRandomString(len, UseCharacters);
+}
+
+QString CryptographicRandomString(const int len) {
+  const QString UseCharacters("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~");
+  return GetRandomString(len, UseCharacters);
+}
+
+QString GetRandomString(const int len, const QString &UseCharacters) {
+
+  QString randstr;
+  for (int i = 0; i < len; ++i) {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+    const qint64 index = QRandomGenerator::global()->bounded(0, UseCharacters.length());
+#else
+    const int index = qrand() % UseCharacters.length();
+#endif
+    QChar nextchar = UseCharacters.at(index);
+    randstr.append(nextchar);
+  }
+
+  return randstr;
+
+}
+
+}  // namespace Utilities

src/utilities/randutils.h

@@ -0,0 +1,34 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef RANDUTILS_H
+#define RANDUTILS_H
+
+#include <QString>
+
+namespace Utilities {
+
+QString GetRandomStringWithChars(const int len);
+QString GetRandomStringWithCharsAndNumbers(const int len);
+QString CryptographicRandomString(const int len);
+QString GetRandomString(const int len, const QString &UseCharacters);
+
+}  // namespace Utilities
+
+#endif  // RANDUTILS_H

src/utilities/strutils.cpp

@@ -0,0 +1,204 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QStringList>
+#include <QRegularExpression>
+#include <QMetaObject>
+#include <QMetaEnum>
+
+#include "strutils.h"
+#include "core/song.h"
+
+namespace Utilities {
+
+QString PrettySize(const quint64 bytes) {
+
+  QString ret;
+
+  if (bytes > 0) {
+    if (bytes <= 1000) {
+      ret = QString::number(bytes) + " bytes";
+    }
+    else if (bytes <= 1000 * 1000) {
+      ret = QString::asprintf("%.1f KB", static_cast<float>(bytes) / 1000.0F);
+    }
+    else if (bytes <= 1000 * 1000 * 1000) {
+      ret = QString::asprintf("%.1f MB", static_cast<float>(bytes) / (1000.0F * 1000.0F));
+    }
+    else {
+      ret = QString::asprintf("%.1f GB", static_cast<float>(bytes) / (1000.0F * 1000.0F * 1000.0F));
+    }
+  }
+  return ret;
+
+}
+
+QString PrettySize(const QSize size) {
+  return QString::number(size.width()) + "x" + QString::number(size.height());
+}
+
+QString PathWithoutFilenameExtension(const QString &filename) {
+  if (filename.section('/', -1, -1).contains('.')) return filename.section('.', 0, -2);
+  return filename;
+}
+
+QString FiddleFileExtension(const QString &filename, const QString &new_extension) {
+  return PathWithoutFilenameExtension(filename) + "." + new_extension;
+}
+
+const char *EnumToString(const QMetaObject &meta, const char *name, const int value) {
+
+  int index = meta.indexOfEnumerator(name);
+  if (index == -1) return "[UnknownEnum]";
+  QMetaEnum metaenum = meta.enumerator(index);
+  const char *result = metaenum.valueToKey(value);
+  if (!result) return "[UnknownEnumValue]";
+  return result;
+
+}
+
+QStringList Prepend(const QString &text, const QStringList &list) {
+
+  QStringList ret(list);
+  for (int i = 0; i < ret.count(); ++i) ret[i].prepend(text);
+  return ret;
+
+}
+
+QStringList Updateify(const QStringList &list) {
+
+  QStringList ret(list);
+  for (int i = 0; i < ret.count(); ++i) ret[i].prepend(ret[i] + " = :");
+  return ret;
+
+}
+
+QString DecodeHtmlEntities(const QString &text) {
+
+  QString copy(text);
+  copy.replace("&amp;", "&")
+      .replace("&#38;", "&")
+      .replace("&quot;", "\"")
+      .replace("&#34;", "\"")
+      .replace("&apos;", "'")
+      .replace("&#39;", "'")
+      .replace("&lt;", "<")
+      .replace("&#60;", "<")
+      .replace("&gt;", ">")
+      .replace("&#62;", ">")
+      .replace("&#x27;", "'");
+
+  return copy;
+
+}
+
+QString ReplaceMessage(const QString &message, const Song &song, const QString &newline, const bool html_escaped) {
+
+  QRegularExpression variable_replacer("[%][a-z]+[%]");
+  QString copy(message);
+
+  // Replace the first line
+  qint64 pos = 0;
+  QRegularExpressionMatch match;
+  for (match = variable_replacer.match(message, pos); match.hasMatch(); match = variable_replacer.match(message, pos)) {
+    pos = match.capturedStart();
+    QStringList captured = match.capturedTexts();
+    copy.replace(captured[0], ReplaceVariable(captured[0], song, newline, html_escaped));
+    pos += match.capturedLength();
+  }
+
+  qint64 index_of = copy.indexOf(QRegularExpression(" - (>|$)"));
+  if (index_of >= 0) copy = copy.remove(index_of, 3);
+
+  return copy;
+
+}
+
+QString ReplaceVariable(const QString &variable, const Song &song, const QString &newline, const bool html_escaped) {
+
+  QString value = variable;
+
+  if (variable == "%title%") {
+    value = song.PrettyTitle();
+  }
+  else if (variable == "%album%") {
+    value = song.album();
+  }
+  else if (variable == "%artist%") {
+    value = song.artist();
+  }
+  else if (variable == "%albumartist%") {
+    value = song.effective_albumartist();
+  }
+  else if (variable == "%track%") {
+    value.setNum(song.track());
+  }
+  else if (variable == "%disc%") {
+    value.setNum(song.disc());
+  }
+  else if (variable == "%year%") {
+    value = song.PrettyYear();
+  }
+  else if (variable == "%originalyear%") {
+    value = song.PrettyOriginalYear();
+  }
+  else if (variable == "%genre%") {
+    value = song.genre();
+  }
+  else if (variable == "%composer%") {
+    value = song.composer();
+  }
+  else if (variable == "%performer%") {
+    value = song.performer();
+  }
+  else if (variable == "%grouping%") {
+    value = song.grouping();
+  }
+  else if (variable == "%length%") {
+    value = song.PrettyLength();
+  }
+  else if (variable == "%filename%") {
+    value = song.basefilename();
+  }
+  else if (variable == "%url%") {
+    value = song.url().toString();
+  }
+  else if (variable == "%playcount%") {
+    value.setNum(song.playcount());
+  }
+  else if (variable == "%skipcount%") {
+    value.setNum(song.skipcount());
+  }
+  else if (variable == "%rating%") {
+    value = song.PrettyRating();
+  }
+  else if (variable == "%newline%") {
+    return QString(newline);  // No HTML escaping, return immediately.
+  }
+
+  if (html_escaped) {
+    value = value.toHtmlEscaped();
+  }
+  return value;
+
+}
+
+}  // namespace Utilities

src/utilities/strutils.h

@@ -0,0 +1,54 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef STRUTILS_H
+#define STRUTILS_H
+
+#include <QString>
+#include <QStringList>
+#include <QMetaObject>
+
+#include "core/song.h"
+
+namespace Utilities {
+
+QString PrettySize(const quint64 bytes);
+QString PrettySize(const QSize size);
+
+// Get the path without the filename extension
+QString PathWithoutFilenameExtension(const QString &filename);
+QString FiddleFileExtension(const QString &filename, const QString &new_extension);
+
+// Replaces some HTML entities with their normal characters.
+QString DecodeHtmlEntities(const QString &text);
+
+// Shortcut for getting a Qt-aware enum value as a string.
+// Pass in the QMetaObject of the class that owns the enum, the string name of the enum and a valid value from that enum.
+const char *EnumToString(const QMetaObject &meta, const char *name, int value);
+
+QStringList Prepend(const QString &text, const QStringList &list);
+QStringList Updateify(const QStringList &list);
+
+QString ReplaceMessage(const QString &message, const Song &song, const QString &newline, const bool html_escaped = false);
+QString ReplaceVariable(const QString &variable, const Song &song, const QString &newline, const bool html_escaped = false);
+
+}  // namespace Utilities
+
+#endif  // STRUTILS_H

src/utilities/threadutils.cpp

@@ -0,0 +1,59 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+
+#ifdef Q_OS_LINUX
+#  include <unistd.h>
+#  include <sys/syscall.h>
+#endif
+
+#ifdef Q_OS_MACOS
+#  include <sys/resource.h>
+#endif
+
+#include "threadutils.h"
+
+namespace Utilities {
+
+long SetThreadIOPriority(const IoPriority priority) {
+
+#ifdef Q_OS_LINUX
+  return syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, GetThreadId(), 4 | priority << IOPRIO_CLASS_SHIFT);
+#elif defined(Q_OS_MACOS)
+  return setpriority(PRIO_DARWIN_THREAD, 0, priority == IOPRIO_CLASS_IDLE ? PRIO_DARWIN_BG : 0);
+#else
+  Q_UNUSED(priority);
+  return 0;
+#endif
+
+}
+
+long GetThreadId() {
+
+#ifdef Q_OS_LINUX
+  return syscall(SYS_gettid);
+#else
+  return 0;
+#endif
+
+}
+
+}  // namespace Utilities

src/utilities/threadutils.h

@@ -0,0 +1,45 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef THREADUTILS_H
+#define THREADUTILS_H
+
+namespace Utilities {
+
+// Borrowed from schedutils
+enum IoPriority {
+  IOPRIO_CLASS_NONE = 0,
+  IOPRIO_CLASS_RT,
+  IOPRIO_CLASS_BE,
+  IOPRIO_CLASS_IDLE,
+};
+enum {
+  IOPRIO_WHO_PROCESS = 1,
+  IOPRIO_WHO_PGRP,
+  IOPRIO_WHO_USER,
+};
+static const int IOPRIO_CLASS_SHIFT = 13;
+
+long SetThreadIOPriority(const IoPriority priority);
+long GetThreadId();
+
+}  // namespace Utilities
+
+#endif  // THREADUTILS_H

src/utilities/timeconstants.h

@@ -0,0 +1,32 @@
+/* This file was part of Clementine.
+   Copyright 2011, David Sansome <me@davidsansome.com>
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+#ifndef TIMECONSTANTS_H
+#define TIMECONSTANTS_H
+
+#include <QtGlobal>
+
+// Use these to convert between time units
+constexpr qint64 kMsecPerSec = 1000ll;
+constexpr qint64 kUsecPerMsec = 1000ll;
+constexpr qint64 kUsecPerSec = 1000000ll;
+constexpr qint64 kNsecPerUsec = 1000ll;
+constexpr qint64 kNsecPerMsec = 1000000ll;
+constexpr qint64 kNsecPerSec = 1000000000ll;
+
+constexpr qint64 kSecsPerDay = 24 * 60 * 60;
+
+#endif  // TIMECONSTANTS_H

src/utilities/timeutils.cpp

@@ -0,0 +1,152 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+#include <QObject>
+#include <QString>
+#include <QStringList>
+#include <QRegularExpression>
+#include <QDate>
+#include <QSize>
+#include <QLocale>
+
+#include "timeconstants.h"
+#include "timeutils.h"
+
+namespace Utilities {
+
+QString PrettyTime(int seconds) {
+
+  // last.fm sometimes gets the track length wrong, so you end up with negative times.
+  seconds = qAbs(seconds);
+
+  int hours = seconds / (60 * 60);
+  int minutes = (seconds / 60) % 60;
+  seconds %= 60;
+
+  QString ret;
+  if (hours > 0) ret = QString::asprintf("%d:%02d:%02d", hours, minutes, seconds);
+  else ret = QString::asprintf("%d:%02d", minutes, seconds);
+
+  return ret;
+
+}
+
+QString PrettyTimeDelta(const int seconds) {
+  return (seconds >= 0 ? "+" : "-") + PrettyTime(seconds);
+}
+
+QString PrettyTimeNanosec(const qint64 nanoseconds) {
+  return PrettyTime(static_cast<int>(nanoseconds / kNsecPerSec));
+}
+
+QString WordyTime(const quint64 seconds) {
+
+  quint64 days = seconds / (60 * 60 * 24);
+
+  // TODO: Make the plural rules translatable
+  QStringList parts;
+
+  if (days > 0) parts << (days == 1 ? QObject::tr("1 day") : QObject::tr("%1 days").arg(days));
+  parts << PrettyTime(static_cast<int>(seconds - days * 60 * 60 * 24));
+
+  return parts.join(" ");
+
+}
+
+QString WordyTimeNanosec(const quint64 nanoseconds) {
+  return WordyTime(nanoseconds / kNsecPerSec);
+}
+
+QString Ago(const qint64 seconds_since_epoch, const QLocale &locale) {
+
+  const QDateTime now = QDateTime::currentDateTime();
+  const QDateTime then = QDateTime::fromSecsSinceEpoch(seconds_since_epoch);
+  const qint64 days_ago = then.date().daysTo(now.date());
+  const QString time = then.time().toString(locale.timeFormat(QLocale::ShortFormat));
+
+  if (days_ago == 0) return QObject::tr("Today") + " " + time;
+  if (days_ago == 1) return QObject::tr("Yesterday") + " " + time;
+  if (days_ago <= 7) return QObject::tr("%1 days ago").arg(days_ago);
+
+  return then.date().toString(locale.dateFormat(QLocale::ShortFormat));
+
+}
+
+QString PrettyFutureDate(const QDate date) {
+
+  const QDate now = QDate::currentDate();
+  const qint64 delta_days = now.daysTo(date);
+
+  if (delta_days < 0) return QString();
+  if (delta_days == 0) return QObject::tr("Today");
+  if (delta_days == 1) return QObject::tr("Tomorrow");
+  if (delta_days <= 7) return QObject::tr("In %1 days").arg(delta_days);
+  if (delta_days <= 14) return QObject::tr("Next week");
+
+  return QObject::tr("In %1 weeks").arg(delta_days / 7);
+
+}
+
+QDateTime ParseRFC822DateTime(const QString &text) {
+
+  QRegularExpression regexp("(\\d{1,2}) (\\w{3,12}) (\\d+) (\\d{1,2}):(\\d{1,2}):(\\d{1,2})");
+  QRegularExpressionMatch re_match = regexp.match(text);
+  if (!re_match.hasMatch()) {
+    return QDateTime();
+  }
+
+  enum class MatchNames { DAYS = 1, MONTHS, YEARS, HOURS, MINUTES, SECONDS };
+
+  QMap<QString, int> monthmap;
+  monthmap["Jan"] = 1;
+  monthmap["Feb"] = 2;
+  monthmap["Mar"] = 3;
+  monthmap["Apr"] = 4;
+  monthmap["May"] = 5;
+  monthmap["Jun"] = 6;
+  monthmap["Jul"] = 7;
+  monthmap["Aug"] = 8;
+  monthmap["Sep"] = 9;
+  monthmap["Oct"] = 10;
+  monthmap["Nov"] = 11;
+  monthmap["Dec"] = 12;
+  monthmap["January"] = 1;
+  monthmap["February"] = 2;
+  monthmap["March"] = 3;
+  monthmap["April"] = 4;
+  monthmap["May"] = 5;
+  monthmap["June"] = 6;
+  monthmap["July"] = 7;
+  monthmap["August"] = 8;
+  monthmap["September"] = 9;
+  monthmap["October"] = 10;
+  monthmap["November"] = 11;
+  monthmap["December"] = 12;
+
+  const QDate date(re_match.captured(static_cast<int>(MatchNames::YEARS)).toInt(), monthmap[re_match.captured(static_cast<int>(MatchNames::MONTHS))], re_match.captured(static_cast<int>(MatchNames::DAYS)).toInt());
+
+  const QTime time(re_match.captured(static_cast<int>(MatchNames::HOURS)).toInt(), re_match.captured(static_cast<int>(MatchNames::MINUTES)).toInt(), re_match.captured(static_cast<int>(MatchNames::SECONDS)).toInt());
+
+  return QDateTime(date, time);
+
+}
+
+}  // namespace Utilities

src/utilities/timeutils.h

@@ -0,0 +1,42 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef TIMEUTILS_H
+#define TIMEUTILS_H
+
+#include <QString>
+#include <QDate>
+#include <QSize>
+#include <QLocale>
+
+namespace Utilities {
+
+QString PrettyTime(int seconds);
+QString PrettyTimeDelta(const int seconds);
+QString PrettyTimeNanosec(const qint64 nanoseconds);
+QString WordyTime(const quint64 seconds);
+QString WordyTimeNanosec(const quint64 nanoseconds);
+QString Ago(const qint64 seconds_since_epoch, const QLocale &locale);
+QString PrettyFutureDate(const QDate date);
+QDateTime ParseRFC822DateTime(const QString &text);
+
+}  // namespace Utilities
+
+#endif  // TIMEUTILS_H

src/utilities/transliterate.cpp

@@ -0,0 +1,94 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <string>
+#include <memory>
+#include <cstdio>
+
+#ifdef HAVE_ICU
+#  include <unicode/translit.h>
+#else
+#  include <iconv.h>
+#endif
+
+#include <QByteArray>
+#include <QString>
+
+#include "transliterate.h"
+
+namespace Utilities {
+
+QString Transliterate(const QString &accented_str) {
+
+#ifdef HAVE_ICU
+
+  UErrorCode errorcode = U_ZERO_ERROR;
+  std::unique_ptr<icu::Transliterator> transliterator;
+  transliterator.reset(icu::Transliterator::createInstance("Any-Latin; Latin-ASCII;", UTRANS_FORWARD, errorcode));
+
+  if (!transliterator) return accented_str;
+
+  QByteArray accented_data = accented_str.toUtf8();
+  icu::UnicodeString ustring = icu::UnicodeString(accented_data.constData());
+  transliterator->transliterate(ustring);
+
+  std::string unaccented_str;
+  ustring.toUTF8String(unaccented_str);
+
+  return QString::fromStdString(unaccented_str);
+
+#else
+
+#ifdef LC_ALL
+  setlocale(LC_ALL, "");
+#endif
+
+  iconv_t conv = iconv_open("ASCII//TRANSLIT", "UTF-8");
+  if (conv == reinterpret_cast<iconv_t>(-1)) return accented_str;
+
+  QByteArray utf8 = accented_str.toUtf8();
+
+  size_t input_len = utf8.length() + 1;
+  char *input_ptr = new char[input_len];
+  char *input = input_ptr;
+
+  size_t output_len = input_len * 2;
+  char *output_ptr = new char[output_len];
+  char *output = output_ptr;
+
+  snprintf(input, input_len, "%s", utf8.constData());
+
+  iconv(conv, &input, &input_len, &output, &output_len);
+  iconv_close(conv);
+
+  QString ret(output_ptr);
+  ret = ret.replace('?', '_');
+
+  delete[] input_ptr;
+  delete[] output_ptr;
+
+  return ret;
+
+#endif  // HAVE_ICU
+
+}  // Transliterate
+
+}  // namespace Utilities

src/utilities/transliterate.h

@@ -0,0 +1,31 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef TRANSLITERATE_H
+#define TRANSLITERATE_H
+
+#include <QString>
+
+namespace Utilities {
+
+QString Transliterate(const QString &accented_str);
+
+}  // namespace Utilities
+
+#endif  // TRANSLITERATE_H

src/utilities/winutils.cpp

@@ -0,0 +1,84 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+
+#include <windows.h>
+#include <dwmapi.h>
+
+#include <QWindow>
+#include <QRegion>
+
+#include "winutils.h"
+
+namespace Utilities {
+
+HRGN qt_RectToHRGN(const QRect &rc);
+HRGN qt_RectToHRGN(const QRect &rc) {
+  return CreateRectRgn(rc.left(), rc.top(), rc.right() + 1, rc.bottom() + 1);
+}
+
+HRGN toHRGN(const QRegion &region);
+HRGN toHRGN(const QRegion &region) {
+
+#  if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+  return region.toHRGN();
+#  else
+
+  const int rect_count = region.rectCount();
+  if (rect_count == 0) {
+    return nullptr;
+  }
+
+  HRGN resultRgn = nullptr;
+  QRegion::const_iterator rects = region.begin();
+  resultRgn = qt_RectToHRGN(rects[0]);
+  for (int i = 1; i < rect_count; ++i) {
+    HRGN tmpRgn = qt_RectToHRGN(rects[i]);
+    const int res = CombineRgn(resultRgn, resultRgn, tmpRgn, RGN_OR);
+    if (res == ERROR) qWarning("Error combining HRGNs.");
+    DeleteObject(tmpRgn);
+  }
+
+  return resultRgn;
+
+#  endif  // Qt 6
+}
+
+void enableBlurBehindWindow(QWindow *window, const QRegion &region) {
+
+  DWM_BLURBEHIND dwmbb = { 0, 0, nullptr, 0 };
+  dwmbb.dwFlags = DWM_BB_ENABLE;
+  dwmbb.fEnable = TRUE;
+  HRGN rgn = nullptr;
+  if (!region.isNull()) {
+    rgn = toHRGN(region);
+    if (rgn) {
+      dwmbb.hRgnBlur = rgn;
+      dwmbb.dwFlags |= DWM_BB_BLURREGION;
+    }
+  }
+  DwmEnableBlurBehindWindow(reinterpret_cast<HWND>(window->winId()), &dwmbb);
+  if (rgn) {
+    DeleteObject(rgn);
+  }
+
+}
+
+}  // namespace Utilities

src/utilities/winutils.h

@@ -0,0 +1,33 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef WINUTILS_H
+#define WINUTILS_H
+
+#include <QRegion>
+
+class QWindow;
+
+namespace Utilities {
+
+void enableBlurBehindWindow(QWindow *window, const QRegion &region);
+
+}  // namespace Utilities
+
+#endif  // WINUTILS_H

src/utilities/xmlutils.cpp

@@ -0,0 +1,69 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QXmlStreamReader>
+
+#include "xmlutils.h"
+
+namespace Utilities {
+
+void ConsumeCurrentElement(QXmlStreamReader *reader) {
+
+  int level = 1;
+  while (level != 0 && !reader->atEnd()) {
+    switch (reader->readNext()) {
+      case QXmlStreamReader::StartElement: ++level; break;
+      case QXmlStreamReader::EndElement: --level; break;
+      default: break;
+    }
+  }
+
+}
+
+bool ParseUntilElement(QXmlStreamReader *reader, const QString &name) {
+
+  while (!reader->atEnd()) {
+    QXmlStreamReader::TokenType type = reader->readNext();
+    if (type == QXmlStreamReader::StartElement && reader->name() == name) {
+      return true;
+    }
+  }
+  return false;
+
+}
+
+bool ParseUntilElementCI(QXmlStreamReader *reader, const QString &name) {
+
+  while (!reader->atEnd()) {
+    QXmlStreamReader::TokenType type = reader->readNext();
+    if (type == QXmlStreamReader::StartElement) {
+      QString element = reader->name().toString().toLower();
+      if (element == name) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+
+}
+
+}  // namespace Utilities

src/utilities/xmlutils.h

@@ -0,0 +1,40 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef XMLUTILS_H
+#define XMLUTILS_H
+
+#include <QString>
+#include <QXmlStreamReader>
+
+namespace Utilities {
+
+// Reads all children of the current element,
+// and returns with the stream reader either on the EndElement for the current element, or the end of the file - whichever came first.
+void ConsumeCurrentElement(QXmlStreamReader *reader);
+
+// Advances the stream reader until it finds an element with the given name.
+// Returns false if the end of the document was reached before finding a matching element.
+bool ParseUntilElement(QXmlStreamReader *reader, const QString &name);
+bool ParseUntilElementCI(QXmlStreamReader *reader, const QString &name);
+
+}  // namespace Utilities
+
+#endif  // XMLUTILS_H