private void ReadEV3Directory(bool resetposition)
{
MemoryStream data = new MemoryStream();
// if (!ev3path.Equals("/proc/")) // avoid locking up the brick
{
// get data from brick
BinaryBuffer b = new BinaryBuffer();
b.Append16(500); // expect max 500 bytes per packet
b.AppendZeroTerminated(internalPath(ev3path));
byte[] response = connection.SystemCommand(EV3Connection.LIST_FILES, b);
if (response == null)
{
throw new Exception("No response to LIST_FILES");
}
if (response.Length < 6)
{
throw new Exception("Response too short for LIST_FILES");
}
if (response[0] != EV3Connection.SUCCESS && response[0] != EV3Connection.END_OF_FILE)
{
throw new Exception("Unexpected status at LIST_FILES: " + response[0]);
}
int handle = response[5] & 0xff;
data.Write(response, 6, response.Length - 6);
// continue reading until have total buffer
while (response[0] != EV3Connection.END_OF_FILE)
{
b.Clear();
b.Append8(handle);
b.Append16(500); // expect max 500 bytes per packet
response = connection.SystemCommand(EV3Connection.CONTINUE_LIST_FILES, b);
// Console.WriteLine("follow-up response length: " + response.Length);
if (response == null)
{
throw new Exception("No response to CONTINUE_LIST_FILES");
}
if (response.Length < 2)
{
throw new Exception("Too short response to CONTINUE_LIST_FILES");
}
if (response[0] != EV3Connection.SUCCESS && response[0] != EV3Connection.END_OF_FILE)
{
throw new Exception("Unexpected status at CONTINUE_LIST_FILES: " + response[0]);
}
// Console.WriteLine("subsequent response length: " + response.Length);
data.Write(response, 2, response.Length - 2);
}
}
List <DirectoryEntry> list = new List <DirectoryEntry>();
data.Position = 0; // start reading at beginning
StreamReader tr = new StreamReader(data, Encoding.GetEncoding("iso-8859-1"));
String l;
while ((l = tr.ReadLine()) != null)
{
if (l.EndsWith("/"))
{
String n = l.Substring(0, l.Length - 1);
if ((!n.Equals(".")) && (!n.Equals("..")))
{
list.Add(new DirectoryEntry(n, 0, true));
}
}
else
{
int firstspace = l.IndexOf(' ');
if (firstspace < 0)
{
continue;
}
int secondspace = l.IndexOf(' ', firstspace + 1);
if (secondspace < 0)
{
continue;
}
int size = int.Parse(l.Substring(firstspace, secondspace - firstspace).Trim(), System.Globalization.NumberStyles.HexNumber);
list.Add(new DirectoryEntry(l.Substring(secondspace + 1), size, false));
}
}
// sort list
list.Sort((x, y) => x.FileName.CompareTo(y.FileName));
// put data into listview
EV3Directory.Items.Clear();
foreach (DirectoryEntry de in list)
{
EV3Directory.Items.Add(de);
}
// let the WPF system re-calculate all column widths so everthing fits as good as possible
foreach (var gvc in EV3DirectoryGridView.Columns)
{
gvc.Width = gvc.ActualWidth;
gvc.Width = Double.NaN;
}
// move the controls scroller to top position
if (resetposition)
{
if (EV3Directory.Items.Count > 0)
{
EV3Directory.ScrollIntoView(EV3Directory.Items[0]);
}
}
}