private IEnumerable<string> ExpandFileSystem(Control control, string text)
{
int num = text.LastIndexOfAny(new char[] { Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar });
string b = (num >= 0) ? text.Substring(0, num + 1) : string.Empty;
if (!string.Equals(this.LastFileSystemSource, b, StringComparison.OrdinalIgnoreCase))
{
this.LastFileSystemSource = b;
try
{
this.LastFileSystemCollection = null;
string str2 = this.UseEnvironmentVariablesSource ? Environment.ExpandEnvironmentVariables(b) : b;
if (!string.IsNullOrEmpty(str2))
{
GetCurrentDirectoryEventArgs e = new GetCurrentDirectoryEventArgs(control, this.CurrentDir);
this.OnGetCurrentDirectory(e);
if (!string.IsNullOrEmpty(e.CurrentDirectory))
{
System.IO.Directory.SetCurrentDirectory(e.CurrentDirectory);
this.LastFileSystemCollection = new List<string>();
}
else if (Path.IsPathRooted(str2))
{
this.LastFileSystemCollection = new List<string>();
}
}
if (this.LastFileSystemCollection != null)
{
PreviewFileSystemInfoEventArgs args2 = null;
foreach (FileSystemInfo info in Microsoft.IO.Directory.GetFileSystemInfos(str2))
{
PreviewFileSystemInfoEventArgs args3 = args2 ?? (args2 = new PreviewFileSystemInfoEventArgs(control));
args3._Value = info;
args3.Cancel = false;
this.OnPreviewFileSystemInfo(args3);
if (!args3.Cancel)
{
this.LastFileSystemCollection.Add(b + info.Name);
}
}
this.LastFileSystemCollection.TrimExcess();
}
}
catch
{
this.LastFileSystemCollection = null;
}
}
if (((text.Length > 0) && (this.LastFileSystemCollection != null)) && (this.LastFileSystemCollection.Count > 0))
{
return this.LastFileSystemCollection.Where<string>(delegate (string x) {
return x.StartsWith(text, StringComparison.OrdinalIgnoreCase);
});
}
return new string[0];
}
protected virtual void OnGetCurrentDirectory(GetCurrentDirectoryEventArgs e)
{
EventHandler<GetCurrentDirectoryEventArgs> handler = base.Events[EventGetCurrentDirectory] as EventHandler<GetCurrentDirectoryEventArgs>;
if (handler != null)
{
handler(this, e);
}
}
private static void GetCurrentDirectory(object sender, GetCurrentDirectoryEventArgs e)
{
VirtualPathBreadcrumb parent = e.Target.Parent as VirtualPathBreadcrumb;
if (parent != null)
{
CustomFileSystemFolder currentFolder = parent.CurrentFolder as CustomFileSystemFolder;
if (currentFolder != null)
{
e.CurrentDirectory = currentFolder.FullName;
}
}
}
