public void ScrollBuffer(int lines)
{
var handle = NativeMethods.GetStdHandle((uint)StandardHandleId.Output);
var scrollRectangle = new SMALL_RECT
{
Top = (short)lines,
Left = 0,
Bottom = (short)(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);
}
public void WriteBufferLines(CHAR_INFO[] buffer, ref int top, bool ensureBottomLineVisible)
{
var handle = NativeMethods.GetStdHandle((uint)StandardHandleId.Output);
int bufferWidth = Console.BufferWidth;
int bufferLineCount = buffer.Length / bufferWidth;
if ((top + bufferLineCount) > Console.BufferHeight)
{
var scrollCount = (top + bufferLineCount) - Console.BufferHeight;
ScrollBuffer(scrollCount);
top -= scrollCount;
}
var bufferSize = new COORD
{
X = (short)bufferWidth,
Y = (short)bufferLineCount
};
var bufferCoord = new COORD {
X = 0, Y = 0
};
var bottom = top + bufferLineCount - 1;
var writeRegion = new SMALL_RECT
{
Top = (short)top,
Left = 0,
Bottom = (short)bottom,
Right = (short)(bufferWidth - 1)
};
NativeMethods.WriteConsoleOutput(handle, buffer,
bufferSize, bufferCoord, ref writeRegion);
// Now make sure the bottom line is visible
if (ensureBottomLineVisible &&
(bottom >= (Console.WindowTop + Console.WindowHeight)))
{
Console.CursorTop = bottom;
}
}
public CHAR_INFO[] ReadBufferLines(int top, int count)
{
var result = new CHAR_INFO[BufferWidth * count];
var handle = NativeMethods.GetStdHandle((uint)StandardHandleId.Output);
var readBufferSize = new COORD {
X = (short)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)(BufferWidth - 1)
};
NativeMethods.ReadConsoleOutput(handle, result,
readBufferSize, readBufferCoord, ref readRegion);
return(result);
}
internal static extern bool WriteConsoleOutput
(
NakedWin32Handle consoleOutput,
CHAR_INFO[] buffer,
COORD bufferSize,
COORD bufferCoord,
ref SMALL_RECT writeRegion
);
private static void WriteBufferLines(CHAR_INFO[] buffer, ref int top)
{
var handle = NativeMethods.GetStdHandle((uint) StandardHandleId.Output);
int bufferWidth = Console.BufferWidth;
int bufferLineCount = buffer.Length / bufferWidth;
if ((top + bufferLineCount) > Console.BufferHeight)
{
var scrollCount = (top + bufferLineCount) - Console.BufferHeight;
ScrollBuffer(scrollCount);
top -= scrollCount;
}
var bufferSize = new COORD
{
X = (short) bufferWidth,
Y = (short) bufferLineCount
};
var bufferCoord = new COORD {X = 0, Y = 0};
var writeRegion = new SMALL_RECT
{
Top = (short) top,
Left = 0,
Bottom = (short) (top + bufferLineCount - 1),
Right = (short) bufferWidth
};
NativeMethods.WriteConsoleOutput(handle, buffer,
bufferSize, bufferCoord, ref writeRegion);
}
public static extern bool ScrollConsoleScreenBuffer(IntPtr hConsoleOutput,
ref SMALL_RECT lpScrollRectangle,
IntPtr lpClipRectangle,
COORD dwDestinationOrigin,
ref CHAR_INFO lpFill);
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 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);
}
public static extern bool ScrollConsoleScreenBuffer(IntPtr hConsoleOutput,
ref SMALL_RECT lpScrollRectangle,
IntPtr lpClipRectangle,
COORD dwDestinationOrigin,
ref CHAR_INFO lpFill);
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;
}
public static extern bool WriteConsoleOutput(IntPtr consoleOutput, CHAR_INFO[] buffer, COORD bufferSize, COORD bufferCoord, ref SMALL_RECT writeRegion);
public static extern bool WriteConsoleOutput(IntPtr consoleOutput, CHAR_INFO[] buffer, COORD bufferSize, COORD bufferCoord, ref SMALL_RECT writeRegion);
internal static extern bool SetConsoleScreenBufferSize(NakedWin32Handle consoleOutput, COORD size);
internal static extern bool SetConsoleCursorPosition(NakedWin32Handle consoleOutput, COORD cursorPosition);
internal static extern bool FillConsoleOutputCharacter
(
NakedWin32Handle consoleOutput,
Char character,
DWORD length,
COORD writeCoord,
out DWORD numberOfCharsWritten
);
internal static extern bool FillConsoleOutputAttribute
(
NakedWin32Handle consoleOutput,
WORD attribute,
DWORD length,
COORD writeCoord,
out DWORD numberOfAttrsWritten
);
/// <summary>
/// Wrap Win32 ScrollConsoleScreenBuffer
/// </summary>
/// <param name="consoleHandle">
///
/// handle for the console where screen buffer is scrolled
///
/// </param>
/// <param name="scrollRectangle">
///
/// area to be scrolled
///
/// </param>
/// <param name="clipRectangle">
///
/// area to be updated after scrolling
///
/// </param>
/// <param name="destOrigin">
///
/// location to which the top left corner of scrollRectangle move
///
/// </param>
/// <param name="fill">
///
/// character and attribute to fill the area vacated by the scroll
///
/// </param>
/// <exception cref="HostException">
/// If Win32's ScrollConsoleScreenBuffer fails
/// </exception>
internal static void ScrollConsoleScreenBuffer
(
ConsoleHandle consoleHandle,
SMALL_RECT scrollRectangle,
SMALL_RECT clipRectangle,
COORD destOrigin, CHAR_INFO fill
)
{
Dbg.Assert(!consoleHandle.IsInvalid, "ConsoleHandle is not valid");
Dbg.Assert(!consoleHandle.IsClosed, "ConsoleHandle is closed");
bool result =
NativeMethods.ScrollConsoleScreenBuffer(
consoleHandle.DangerousGetHandle(),
ref scrollRectangle,
ref clipRectangle,
destOrigin,
ref fill);
if (result == false)
{
int err = Marshal.GetLastWin32Error();
HostException e = CreateHostException(err, "ScrollConsoleScreenBuffer",
ErrorCategory.WriteError, ConsoleControlStrings.ScrollConsoleScreenBufferExceptionTemplate);
throw e;
}
}
public static extern bool ReadConsoleOutput(IntPtr consoleOutput, [Out] CHAR_INFO[] buffer, COORD bufferSize, COORD bufferCoord, ref SMALL_RECT readRegion);
internal static extern bool ReadConsoleOutput
(
NakedWin32Handle consoleOutput,
[Out] CHAR_INFO[] buffer,
COORD bufferSize,
COORD bufferCoord,
ref SMALL_RECT readRegion
);
internal static extern bool ScrollConsoleScreenBuffer
(
NakedWin32Handle consoleOutput,
ref SMALL_RECT scrollRectangle,
ref SMALL_RECT clipRectangle,
COORD destinationOrigin,
ref CHAR_INFO fill
);
public static extern bool ReadConsoleOutput(IntPtr consoleOutput, [Out] CHAR_INFO[] buffer, COORD bufferSize, COORD bufferCoord, ref SMALL_RECT readRegion);