/// <summary>
/// Perform backups of jpg and png files in the specified directory. Files with an existing backup are ignored.
/// </summary>
/// <param name="targetDir">Target directory</param>
/// <param name="move">If enabled, remove the original files after performing a backup</param>
/// <param name="overwriteWithImage">If specified, also replace all the original images with the specified image file</param>
public static void PerformBackupReplace(string targetDir, bool removeOriginal, string overwriteWithImage = null)
{
foreach (string picture in Directory.GetFiles(targetDir, "*.jpg").Union(Directory.GetFiles(targetDir, "*.png")))
{
string pictureBackup = picture + ".bak";
if (!File.Exists(pictureBackup))
{
if (removeOriginal)
{
File.Move(picture, pictureBackup);
}
else
{
File.Copy(picture, pictureBackup);
}
}
if (overwriteWithImage != null)
{
if (!File.Exists(overwriteWithImage))
{
throw new ArgumentException("The specified image file does not exist.", "overwriteWithImage");
}
ImageEncoder.AutoCopyImageFile(overwriteWithImage, picture);
}
}
}
/// <summary>
/// Replace the system lockscreen image for Windows 7, 8 and 10.
/// </summary>
/// <remarks>Administrator permissions are required</remarks>
/// <param name="path">Path to the new .jpg file for global lockscreen</param>
public static void SetGlobalLockscreen(string path)
{
if (WindowsVersion.IsMono)
{
throw new NotImplementedException("Lockscreen handling is not implemented for Mac and Linux using the Mono framework.");
}
else if (WindowsVersion.WinMajorVersion == 6 && WindowsVersion.WinMinorVersion == 1 /* Windows 7 */)
{
string lockscreenDir = Win7_InitDir();
string lockscreenPic = String.Concat(lockscreenDir, Path.DirectorySeparatorChar, "backgroundDefault.jpg");
PerformBackupReplace(lockscreenDir, true);
ImageEncoder.CreateJpeg(path, lockscreenPic, 256000);
Win7_RegistryKey(true);
//Create a dummy backup if the machine contains no OEM background image
if (!File.Exists(lockscreenPic + ".bak"))
{
File.Create(lockscreenPic + ".bak").Close();
}
}
else if ((WindowsVersion.WinMajorVersion == 6 && WindowsVersion.WinMajorVersion >= 2) || /* Windows 8 and 10 */
WindowsVersion.WinMajorVersion >= 10 /* Windows 10 and future Windows versions - might not work on newer versions */)
{
string lockscreenDir = Win10_InitDir();
PerformBackupReplace(lockscreenDir, false, path);
Win10_ClearCache();
}
else
{
throw new NotImplementedException(
String.Format(
"Lockscreen handling is not implemented for Windows NT {0}.{1}",
WindowsVersion.WinMajorVersion,
WindowsVersion.WinMinorVersion
)
);
}
}
