void ClearBuffer()
{
for (int i = 0; i < buffer.Length; i++)
{
buffer[i] = new CHAR_INFO(' ', ForegroundColor, BackgroundColor);
}
}
static private void SetPrompt(string prompt)
{
if (string.IsNullOrEmpty(prompt))
{
return;
}
var handle = NativeMethods.GetStdHandle((uint)StandardHandleId.Output);
var lineCount = 1 + prompt.Count(c => c == '\n');
if (lineCount > 1)
{
var options = new SetPSReadlineOption {
ExtraPromptLineCount = lineCount - 1
};
PSConsoleReadLine.SetOptions(options);
}
int bufferWidth = Console.BufferWidth;
var consoleBuffer = new CHAR_INFO[lineCount * bufferWidth];
int j = 0;
for (int i = 0; i < prompt.Length; i++, j++)
{
if (prompt[i] == '\n')
{
for (; j % Console.BufferWidth != 0; j++)
{
consoleBuffer[j] = new CHAR_INFO(' ', Console.ForegroundColor, Console.BackgroundColor);
}
Console.CursorTop += 1;
Console.CursorLeft = 0;
j -= 1; // We don't actually write the newline
}
else
{
consoleBuffer[j] = new CHAR_INFO(prompt[i], Console.ForegroundColor, Console.BackgroundColor);
Console.CursorLeft += 1;
}
}
var bufferSize = new COORD
{
X = (short)bufferWidth,
Y = (short)lineCount
};
var bufferCoord = new COORD {
X = 0, Y = 0
};
var writeRegion = new SMALL_RECT
{
Top = 0,
Left = 0,
Bottom = (short)(lineCount - 1),
Right = (short)bufferWidth
};
NativeMethods.WriteConsoleOutput(handle, consoleBuffer, bufferSize, bufferCoord, ref writeRegion);
}
private CHAR_INFO[] CreateCharInfoBuffer(int lines, params object[] items)
{
var result = new List <CHAR_INFO>();
var fg = Console.ForegroundColor;
var bg = Console.BackgroundColor;
foreach (var i in items)
{
var item = i;
if (item is char)
{
result.Add(new CHAR_INFO((char)item, fg, bg));
continue;
}
if (item is InvertedToken)
{
fg = (ConsoleColor)((int)fg ^ 7);
bg = (ConsoleColor)((int)bg ^ 7);
continue;
}
if (item is NextLineToken)
{
item = new string(' ', Console.BufferWidth - (result.Count % Console.BufferWidth));
fg = Console.ForegroundColor;
bg = Console.BackgroundColor;
// Fallthrough to string case.
}
var str = item as string;
if (str != null)
{
result.AddRange(str.Select(c => new CHAR_INFO(c, fg, bg)));
continue;
}
if (item is TokenClassification)
{
fg = ForegroundColors[(int)(TokenClassification)item];
bg = BackgroundColors[(int)(TokenClassification)item];
continue;
}
var tuple = item as Tuple <ConsoleColor, ConsoleColor>;
if (tuple != null)
{
fg = tuple.Item1;
bg = tuple.Item2;
continue;
}
throw new ArgumentException("Unexpected type");
}
var extraSpacesNeeded = (lines * Console.BufferWidth) - result.Count;
if (extraSpacesNeeded > 0)
{
var space = new CHAR_INFO(' ', Console.ForegroundColor, Console.BackgroundColor);
result.AddRange(Enumerable.Repeat(space, extraSpacesNeeded));
}
return(result.ToArray());
}
public CHAR_INFO[] ReadBufferLines(int top, int count)
{
var toCopy = BufferWidth * count;
var result = new CHAR_INFO[toCopy];
Array.Copy(buffer, top * BufferWidth, result, 0, toCopy);
return(result);
}
private static void ScrollBuffer(int lines)
{
var handle = NativeMethods.GetStdHandle((uint) StandardHandleId.Output);
var scrollRectangle = new SMALL_RECT
{
Top = (short) lines,
Left = 0,
Bottom = (short) (lines + Console.BufferHeight - 1),
Right = (short)Console.BufferWidth
};
var destinationOrigin = new COORD {X = 0, Y = 0};
var fillChar = new CHAR_INFO(' ', Console.ForegroundColor, Console.BackgroundColor);
NativeMethods.ScrollConsoleScreenBuffer(handle, ref scrollRectangle, IntPtr.Zero, destinationOrigin, ref fillChar);
}
private static CHAR_INFO[] ReadBufferLines(int top, int count)
{
var result = new CHAR_INFO[Console.BufferWidth * count];
var handle = NativeMethods.GetStdHandle((uint) StandardHandleId.Output);
var readBufferSize = new COORD {
X = (short)Console.BufferWidth,
Y = (short)count};
var readBufferCoord = new COORD {X = 0, Y = 0};
var readRegion = new SMALL_RECT
{
Top = (short)top,
Left = 0,
Bottom = (short)(top + count),
Right = (short)(Console.BufferWidth - 1)
};
NativeMethods.ReadConsoleOutput(handle, result,
readBufferSize, readBufferCoord, ref readRegion);
return result;
}