private static void WriteBlankLines(int count, int top)
{
var blanks = new CHAR_INFO[count * Console.BufferWidth];
for (int i = 0; i < blanks.Length; i++)
{
blanks[i].BackgroundColor = Console.BackgroundColor;
blanks[i].ForegroundColor = Console.ForegroundColor;
blanks[i].UnicodeChar = ' ';
}
WriteBufferLines(blanks, ref top);
}
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);
}
private void MaybeEmphasize(ref CHAR_INFO charInfo, int i, ConsoleColor foregroundColor, ConsoleColor backgroundColor)
{
if (i >= _emphasisStart && i < (_emphasisStart + _emphasisLength))
{
backgroundColor = _options.EmphasisBackgroundColor;
foregroundColor = _options.EmphasisForegroundColor;
}
else if (_visualSelectionCommandCount > 0 && InRegion(i))
{
// We can't quite emulate real console selection because it inverts
// based on actual screen colors, our pallete is limited. The choice
// to invert only the lower 3 bits to change the color is somewhat
// but looks best with the 2 default color schemes - starting PowerShell
// from it's shortcut or from a cmd shortcut.
foregroundColor = (ConsoleColor)((int)foregroundColor ^ 7);
backgroundColor = (ConsoleColor)((int)backgroundColor ^ 7);
}
charInfo.ForegroundColor = foregroundColor;
charInfo.BackgroundColor = backgroundColor;
}
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 ScrollConsoleScreenBuffer
(
NakedWin32Handle consoleOutput,
ref SMALL_RECT scrollRectangle,
ref SMALL_RECT clipRectangle,
COORD destinationOrigin,
ref CHAR_INFO fill
);
public static extern bool ScrollConsoleScreenBuffer(IntPtr hConsoleOutput,
ref SMALL_RECT lpScrollRectangle,
IntPtr lpClipRectangle,
COORD dwDestinationOrigin,
ref CHAR_INFO lpFill);
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();
}
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);
}
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);
}
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;
}
private void ReallyRender()
{
var text = ParseInput();
int statusLineCount = GetStatusLineCount();
int j = _initialX + (_bufferWidth * Options.ExtraPromptLineCount);
var backgroundColor = _initialBackgroundColor;
var foregroundColor = _initialForegroundColor;
bool afterLastToken = false;
int totalBytes = j;
int bufferWidth = _console.BufferWidth;
var tokenStack = new Stack <SavedTokenState>();
tokenStack.Push(new SavedTokenState
{
Tokens = _tokens,
Index = 0,
BackgroundColor = _initialBackgroundColor,
ForegroundColor = _initialForegroundColor
});
int bufferLineCount;
try
{
_console.StartRender();
bufferLineCount = ConvertOffsetToCoordinates(text.Length).Y - _initialY + 1 + statusLineCount;
if (_consoleBuffer.Length != bufferLineCount * bufferWidth)
{
var newBuffer = new CHAR_INFO[bufferLineCount * bufferWidth];
Array.Copy(_consoleBuffer, newBuffer, _initialX + (Options.ExtraPromptLineCount * _bufferWidth));
if (_consoleBuffer.Length > bufferLineCount * bufferWidth)
{
int consoleBufferOffset = ConvertOffsetToConsoleBufferOffset(text.Length, _initialX + (Options.ExtraPromptLineCount * _bufferWidth));
// Need to erase the extra lines that we won't draw again
for (int i = consoleBufferOffset; i < _consoleBuffer.Length; i++)
{
_consoleBuffer[i] = _space;
}
_console.WriteBufferLines(_consoleBuffer, ref _initialY);
}
_consoleBuffer = newBuffer;
}
for (int i = 0; i < text.Length; i++)
{
totalBytes = totalBytes % bufferWidth;
if (!afterLastToken)
{
// Figure out the color of the character - if it's in a token,
// use the tokens color otherwise use the initial color.
var state = tokenStack.Peek();
var token = state.Tokens[state.Index];
if (i == token.Extent.EndOffset)
{
if (token == state.Tokens[state.Tokens.Length - 1])
{
tokenStack.Pop();
if (tokenStack.Count == 0)
{
afterLastToken = true;
token = null;
foregroundColor = _initialForegroundColor;
backgroundColor = _initialBackgroundColor;
}
else
{
state = tokenStack.Peek();
}
}
if (!afterLastToken)
{
foregroundColor = state.ForegroundColor;
backgroundColor = state.BackgroundColor;
token = state.Tokens[++state.Index];
}
}
if (!afterLastToken && i == token.Extent.StartOffset)
{
GetTokenColors(token, out foregroundColor, out backgroundColor);
var stringToken = token as StringExpandableToken;
if (stringToken != null)
{
// We might have nested tokens.
if (stringToken.NestedTokens != null && stringToken.NestedTokens.Any())
{
var tokens = new Token[stringToken.NestedTokens.Count + 1];
stringToken.NestedTokens.CopyTo(tokens, 0);
// NestedTokens doesn't have an "EOS" token, so we use
// the string literal token for that purpose.
tokens[tokens.Length - 1] = stringToken;
tokenStack.Push(new SavedTokenState
{
Tokens = tokens,
Index = 0,
BackgroundColor = backgroundColor,
ForegroundColor = foregroundColor
});
if (i == tokens[0].Extent.StartOffset)
{
GetTokenColors(tokens[0], out foregroundColor, out backgroundColor);
}
}
}
}
}
var charToRender = text[i];
if (charToRender == '\n')
{
while ((j % bufferWidth) != 0)
{
_consoleBuffer[j++] = _space;
}
for (int k = 0; k < Options.ContinuationPrompt.Length; k++, j++)
{
_consoleBuffer[j].UnicodeChar = Options.ContinuationPrompt[k];
_consoleBuffer[j].ForegroundColor = Options.ContinuationPromptForegroundColor;
_consoleBuffer[j].BackgroundColor = Options.ContinuationPromptBackgroundColor;
}
}
else
{
int size = LengthInBufferCells(charToRender);
totalBytes += size;
//if there is no enough space for the character at the edge, fill in spaces at the end and
//put the character to next line.
int filling = totalBytes > bufferWidth ? (totalBytes - bufferWidth) % size : 0;
for (int f = 0; f < filling; f++)
{
_consoleBuffer[j++] = _space;
totalBytes++;
}
if (char.IsControl(charToRender))
{
_consoleBuffer[j].UnicodeChar = '^';
MaybeEmphasize(ref _consoleBuffer[j++], i, foregroundColor, backgroundColor);
_consoleBuffer[j].UnicodeChar = (char)('@' + charToRender);
MaybeEmphasize(ref _consoleBuffer[j++], i, foregroundColor, backgroundColor);
}
else if (size > 1)
{
_consoleBuffer[j].UnicodeChar = charToRender;
_consoleBuffer[j].Attributes = (ushort)(_consoleBuffer[j].Attributes |
(uint)CHAR_INFO_Attributes.COMMON_LVB_LEADING_BYTE);
MaybeEmphasize(ref _consoleBuffer[j++], i, foregroundColor, backgroundColor);
_consoleBuffer[j].UnicodeChar = charToRender;
_consoleBuffer[j].Attributes = (ushort)(_consoleBuffer[j].Attributes |
(uint)CHAR_INFO_Attributes.COMMON_LVB_TRAILING_BYTE);
MaybeEmphasize(ref _consoleBuffer[j++], i, foregroundColor, backgroundColor);
}
else
{
_consoleBuffer[j].UnicodeChar = charToRender;
MaybeEmphasize(ref _consoleBuffer[j++], i, foregroundColor, backgroundColor);
}
}
}
}
finally
{
_console.EndRender();
}
for (; j < (_consoleBuffer.Length - (statusLineCount * _bufferWidth)); j++)
{
_consoleBuffer[j] = _space;
}
if (_statusLinePrompt != null)
{
foregroundColor = _statusIsErrorMessage ? Options.ErrorForegroundColor : _console.ForegroundColor;
backgroundColor = _statusIsErrorMessage ? Options.ErrorBackgroundColor : _console.BackgroundColor;
for (int i = 0; i < _statusLinePrompt.Length; i++, j++)
{
_consoleBuffer[j].UnicodeChar = _statusLinePrompt[i];
_consoleBuffer[j].ForegroundColor = foregroundColor;
_consoleBuffer[j].BackgroundColor = backgroundColor;
}
for (int i = 0; i < _statusBuffer.Length; i++, j++)
{
_consoleBuffer[j].UnicodeChar = _statusBuffer[i];
_consoleBuffer[j].ForegroundColor = foregroundColor;
_consoleBuffer[j].BackgroundColor = backgroundColor;
}
for (; j < _consoleBuffer.Length; j++)
{
_consoleBuffer[j] = _space;
}
}
bool rendered = false;
if (_parseErrors.Length > 0)
{
int promptChar = _initialX - 1 + (_bufferWidth * Options.ExtraPromptLineCount);
while (promptChar >= 0)
{
var c = (char)_consoleBuffer[promptChar].UnicodeChar;
if (char.IsWhiteSpace(c))
{
promptChar -= 1;
continue;
}
ConsoleColor prevColor = _consoleBuffer[promptChar].ForegroundColor;
_consoleBuffer[promptChar].ForegroundColor = ConsoleColor.Red;
_console.WriteBufferLines(_consoleBuffer, ref _initialY);
rendered = true;
_consoleBuffer[promptChar].ForegroundColor = prevColor;
break;
}
}
if (!rendered)
{
_console.WriteBufferLines(_consoleBuffer, ref _initialY);
}
PlaceCursor();
if ((_initialY + bufferLineCount) > (_console.WindowTop + _console.WindowHeight))
{
_console.WindowTop = _initialY + bufferLineCount - _console.WindowHeight;
}
_lastRenderTime.Restart();
}
public static extern bool WriteConsoleOutput(IntPtr consoleOutput, CHAR_INFO[] buffer, COORD bufferSize, COORD bufferCoord, ref SMALL_RECT writeRegion);
internal static extern bool WriteConsoleOutput
(
NakedWin32Handle consoleOutput,
CHAR_INFO[] buffer,
COORD bufferSize,
COORD bufferCoord,
ref SMALL_RECT writeRegion
);
/// <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;
}
}
private static void ReadConsoleOutputPlain
(
ConsoleHandle consoleHandle,
Coordinates origin,
Rectangle contentsRegion,
ref BufferCell[,] contents
)
{
int rows = contentsRegion.Bottom - contentsRegion.Top + 1;
int cols = contentsRegion.Right - contentsRegion.Left + 1;
if ((rows <= 0) || cols <= 0)
{
tracer.WriteLine("invalid contents region");
return;
}
int bufferLimit = 2 * 1024; // Limit is 8K bytes as each CHAR_INFO takes 4 bytes
COORD bufferCoord;
bufferCoord.X = 0;
bufferCoord.Y = 0;
// keeps track of which screen area read
SMALL_RECT readRegion;
readRegion.Top = (short)origin.Y;
int rowsRemaining = rows;
while (rowsRemaining > 0)
{
// Iteration of columns is nested inside iteration of rows.
// If the size of contents exceeds the buffer limit, reading is
// done in blocks of size equal to the bufferlimit from left to right
// then top to bottom.
// For each iteration of rows,
// - readRegion.Left and bufferSize.X are reset
// - rowsRemaining, readRegion.Top, readRegion.Bottom, and bufferSize.Y
// are updated
// For each iteration of columns,
// - readRegion.Left, readRegion.Right and bufferSize.X are updated
readRegion.Left = (short)origin.X;
COORD bufferSize;
bufferSize.X = (short)Math.Min(cols, bufferLimit);
bufferSize.Y = (short)Math.Min
(
rowsRemaining,
bufferLimit / bufferSize.X
);
readRegion.Bottom = (short)(readRegion.Top + bufferSize.Y - 1);
// atContentsRow is at which row of contents a particular iteration is operating
int atContentsRow = rows - rowsRemaining + contentsRegion.Top;
// number of columns yet to be read
int colsRemaining = cols;
while (colsRemaining > 0)
{
readRegion.Right = (short)(readRegion.Left + bufferSize.X - 1);
// Now readRegion and bufferSize are updated.
// Call NativeMethods.ReadConsoleOutput
CHAR_INFO[] characterBuffer = new CHAR_INFO[bufferSize.Y * bufferSize.X];
bool result = NativeMethods.ReadConsoleOutput(
consoleHandle.DangerousGetHandle(),
characterBuffer,
bufferSize,
bufferCoord,
ref readRegion);
if (result == false)
{
// When WriteConsoleOutput fails, half bufferLimit
if (bufferLimit < 2)
{
int err = Marshal.GetLastWin32Error();
HostException e = CreateHostException(err, "ReadConsoleOutput",
ErrorCategory.ReadError, ConsoleControlStrings.ReadConsoleOutputExceptionTemplate);
throw e;
}
// if cols == colsRemaining, nothing is guaranteed read in this pass and
// the unread area is still rectangular
bufferLimit /= 2;
if (cols == colsRemaining)
{
bufferSize.Y = 0;
break;
}
else
{
// some areas have been read. This could only happen when the number of columns
// to write is larger than bufferLimit. In that case, the algorithm reads one row
// at a time => bufferSize.Y == 1. Then, we can safely leave bufferSize.Y unchanged
// to retry with a smaller bufferSize.X.
Dbg.Assert(bufferSize.Y == 1, string.Format(CultureInfo.InvariantCulture, "bufferSize.Y should be 1, but is {0}", bufferSize.Y));
bufferSize.X = (short)Math.Min(colsRemaining, bufferLimit);
continue;
}
}
// atContentsCol is at which column of contents a particular iteration is operating
int atContentsCol = cols - colsRemaining + contentsRegion.Left;
// copy characterBuffer to contents;
int characterBufferIndex = 0;
for (int r = atContentsRow; r < bufferSize.Y + atContentsRow; r++)
{
for (int c = atContentsCol; c < bufferSize.X + atContentsCol; c++, characterBufferIndex++)
{
contents[r, c].Character = (char)
characterBuffer[characterBufferIndex].UnicodeChar;
ConsoleColor fgColor, bgColor;
WORDToColor(characterBuffer[characterBufferIndex].Attributes,
out fgColor,
out bgColor);
contents[r, c].ForegroundColor = fgColor;
contents[r, c].BackgroundColor = bgColor;
}
}
colsRemaining -= bufferSize.X;
readRegion.Left += bufferSize.X;
bufferSize.X = (short)Math.Min(colsRemaining, bufferLimit);
} // column iteration
rowsRemaining -= bufferSize.Y;
readRegion.Top += bufferSize.Y;
} // row iteration
// The following nested loop set the value of the empty cells in contents:
// character to ' '
// foreground color to console's foreground color
// background color to console's background color
int rowIndex = contents.GetLowerBound(0);
int rowEnd = contents.GetUpperBound(0);
int colBegin = contents.GetLowerBound(1);
int colEnd = contents.GetUpperBound(1);
CONSOLE_SCREEN_BUFFER_INFO bufferInfo =
GetConsoleScreenBufferInfo(consoleHandle);
ConsoleColor foreground = 0;
ConsoleColor background = 0;
WORDToColor(
bufferInfo.Attributes,
out foreground,
out background
);
while (rowIndex <= rowEnd)
{
int colIndex = colBegin;
while (true)
{
// if contents[rowIndex,colIndex] is in contentsRegion, hence a non-empty cell,
// move colIndex to one past the right end of contentsRegion
if (contentsRegion.Top <= rowIndex && rowIndex <= contentsRegion.Bottom &&
contentsRegion.Left <= colIndex && colIndex <= contentsRegion.Right)
{
colIndex = contentsRegion.Right + 1;
}
// colIndex past contents last column
if (colIndex > colEnd)
{
break;
}
contents[rowIndex, colIndex].Character = ' ';
contents[rowIndex, colIndex].ForegroundColor = foreground;
contents[rowIndex, colIndex].BackgroundColor = background;
colIndex++;
}
rowIndex++;
}
}
private static bool ReadConsoleOutputCJKSmall
(
ConsoleHandle consoleHandle,
uint codePage,
Coordinates origin,
Rectangle contentsRegion,
ref BufferCell[,] contents
)
{
COORD bufferSize;
bufferSize.X = (short)(contentsRegion.Right - contentsRegion.Left + 1);
bufferSize.Y = (short)(contentsRegion.Bottom - contentsRegion.Top + 1);
COORD bufferCoord;
bufferCoord.X = 0;
bufferCoord.Y = 0;
CHAR_INFO[] characterBuffer = new CHAR_INFO[bufferSize.X * bufferSize.Y];
SMALL_RECT readRegion;
readRegion.Left = (short)origin.X;
readRegion.Top = (short)origin.Y;
readRegion.Right = (short)(origin.X + bufferSize.X - 1);
readRegion.Bottom = (short)(origin.Y + bufferSize.Y - 1);
// Suppress the PreFAST warning about not using Marshal.GetLastWin32Error() to
// get the error code.
#pragma warning disable 56523
bool result = NativeMethods.ReadConsoleOutput(
consoleHandle.DangerousGetHandle(),
characterBuffer,
bufferSize,
bufferCoord,
ref readRegion);
if (!result)
{
return false;
}
int characterBufferIndex = 0;
for (int r = contentsRegion.Top; r <= contentsRegion.Bottom; r++)
{
for (int c = contentsRegion.Left; c <= contentsRegion.Right; c++, characterBufferIndex++)
{
ConsoleColor fgColor, bgColor;
contents[r, c].Character = (char)characterBuffer[characterBufferIndex].UnicodeChar;
WORDToColor(characterBuffer[characterBufferIndex].Attributes,
out fgColor,
out bgColor);
contents[r, c].ForegroundColor = fgColor;
contents[r, c].BackgroundColor = bgColor;
// Set the attributes of the buffercells to be the same as that of the
// incoming CHAR_INFO. In case where the CHAR_INFO character is a
// trailing byte set the Character of BufferCell to 0. This is done
// because at a lot of places this check is being done. Having a trailing
// character to be 0 is by design.
if ((characterBuffer[characterBufferIndex].Attributes & (ushort)NativeMethods.CHAR_INFO_Attributes.COMMON_LVB_LEADING_BYTE)
== (ushort)NativeMethods.CHAR_INFO_Attributes.COMMON_LVB_LEADING_BYTE)
{
contents[r, c].BufferCellType = BufferCellType.Leading;
}
else if ((characterBuffer[characterBufferIndex].Attributes & (ushort)NativeMethods.CHAR_INFO_Attributes.COMMON_LVB_TRAILING_BYTE)
== (ushort)NativeMethods.CHAR_INFO_Attributes.COMMON_LVB_TRAILING_BYTE)
{
contents[r, c].Character = (char)0;
contents[r, c].BufferCellType = BufferCellType.Trailing;
}
else
{
int charLength = LengthInBufferCells(contents[r, c].Character);
if (charLength == 2)
{
// When it's RasterFont, the "Leading_byte"/"Trailing_byte" are not effective, we
// need to decide the leading byte by checking the char length.
contents[r, c].BufferCellType = BufferCellType.Leading;
c++;
contents[r, c].Character = (char)0;
contents[r, c].ForegroundColor = fgColor;
contents[r, c].BackgroundColor = bgColor;
contents[r, c].BufferCellType = BufferCellType.Trailing;
}
else
{
contents[r, c].BufferCellType = BufferCellType.Complete;
}
}
}
}
return true;
}
private static void WriteConsoleOutputPlain(ConsoleHandle consoleHandle, Coordinates origin, BufferCell[,] contents)
{
int rows = contents.GetLength(0);
int cols = contents.GetLength(1);
if ((rows <= 0) || cols <= 0)
{
tracer.WriteLine("contents passed in has 0 rows and columns");
return;
}
int bufferLimit = 2 * 1024; // Limit is 8K bytes as each CHAR_INFO takes 4 bytes
COORD bufferCoord;
bufferCoord.X = 0;
bufferCoord.Y = 0;
// keeps track of which screen area write
SMALL_RECT writeRegion;
writeRegion.Top = (short)origin.Y;
int rowsRemaining = rows;
while (rowsRemaining > 0)
{
// Iteration of columns is nested inside iteration of rows.
// If the size of contents exceeds the buffer limit, writing is
// done in blocks of size equal to the bufferlimit from left to right
// then top to bottom.
// For each iteration of rows,
// - writeRegion.Left and bufferSize.X are reset
// - rowsRemaining, writeRegion.Top, writeRegion.Bottom, and bufferSize.Y
// are updated
// For each iteration of columns,
// - writeRegion.Left, writeRegion.Right and bufferSize.X are updated
writeRegion.Left = (short)origin.X;
COORD bufferSize;
bufferSize.X = (short)Math.Min(cols, bufferLimit);
bufferSize.Y = (short)Math.Min
(
rowsRemaining,
bufferLimit / bufferSize.X
);
writeRegion.Bottom = (short)(writeRegion.Top + bufferSize.Y - 1);
// atRow is at which row of contents a particular iteration is operating
int atRow = rows - rowsRemaining + contents.GetLowerBound(0);
// number of columns yet to be written
int colsRemaining = cols;
while (colsRemaining > 0)
{
writeRegion.Right = (short)(writeRegion.Left + bufferSize.X - 1);
// atCol is at which column of contents a particular iteration is operating
int atCol = cols - colsRemaining + contents.GetLowerBound(1);
CHAR_INFO[] characterBuffer = new CHAR_INFO[bufferSize.Y * bufferSize.X];
// copy characterBuffer to contents;
for (int r = atRow, characterBufferIndex = 0;
r < bufferSize.Y + atRow; r++)
{
for (int c = atCol; c < bufferSize.X + atCol; c++, characterBufferIndex++)
{
characterBuffer[characterBufferIndex].UnicodeChar =
(ushort)contents[r, c].Character;
characterBuffer[characterBufferIndex].Attributes =
ColorToWORD(contents[r, c].ForegroundColor, contents[r, c].BackgroundColor);
}
}
// Now writeRegion, bufferSize and characterBuffer are updated.
// Call NativeMethods.WriteConsoleOutput
bool result =
NativeMethods.WriteConsoleOutput(
consoleHandle.DangerousGetHandle(),
characterBuffer,
bufferSize,
bufferCoord,
ref writeRegion);
if (result == false)
{
// When WriteConsoleOutput fails, half bufferLimit
if (bufferLimit < 2)
{
int err = Marshal.GetLastWin32Error();
HostException e = CreateHostException(err, "WriteConsoleOutput",
ErrorCategory.WriteError, ConsoleControlStrings.WriteConsoleOutputExceptionTemplate);
throw e;
}
bufferLimit /= 2;
if (cols == colsRemaining)
{
// if cols == colsRemaining, nothing is guaranteed written in this pass and
// the unwritten area is still rectangular
bufferSize.Y = 0;
break;
}
else
{
// some areas have been written. This could only happen when the number of columns
// to write is larger than bufferLimit. In that case, the algorithm writes one row
// at a time => bufferSize.Y == 1. Then, we can safely leave bufferSize.Y unchanged
// to retry with a smaller bufferSize.X.
Dbg.Assert(bufferSize.Y == 1, string.Format(CultureInfo.InvariantCulture, "bufferSize.Y should be 1, but is {0}", bufferSize.Y));
bufferSize.X = (short)Math.Min(colsRemaining, bufferLimit);
continue;
}
}
colsRemaining -= bufferSize.X;
writeRegion.Left += bufferSize.X;
bufferSize.X = (short)Math.Min(colsRemaining, bufferLimit);
} // column iteration
rowsRemaining -= bufferSize.Y;
writeRegion.Top += bufferSize.Y;
} // row iteration
}
private static void WriteConsoleOutputCJK(ConsoleHandle consoleHandle, Coordinates origin, Rectangle contentsRegion, BufferCell[,] contents, BufferCellArrayRowType rowType)
{
Dbg.Assert(origin.X >= 0 && origin.Y >= 0,
"origin must be within the output buffer");
int rows = contentsRegion.Bottom - contentsRegion.Top + 1;
int cols = contentsRegion.Right - contentsRegion.Left + 1;
CONSOLE_FONT_INFO_EX fontInfo = GetConsoleFontInfo(consoleHandle);
int fontType = fontInfo.FontFamily & NativeMethods.FontTypeMask;
bool trueTypeInUse = (fontType & NativeMethods.TrueTypeFont) == NativeMethods.TrueTypeFont;
int bufferLimit = 2 * 1024; // Limit is 8K bytes as each CHAR_INFO takes 4 bytes
COORD bufferCoord;
bufferCoord.X = 0;
bufferCoord.Y = 0;
// keeps track of which screen area write
SMALL_RECT writeRegion;
writeRegion.Top = (short)origin.Y;
int rowsRemaining = rows;
while (rowsRemaining > 0)
{
// Iteration of columns is nested inside iteration of rows.
// If the size of contents exceeds the buffer limit, writing is
// done in blocks of size equal to the bufferlimit from left to right
// then top to bottom.
// For each iteration of rows,
// - writeRegion.Left and bufferSize.X are reset
// - rowsRemaining, writeRegion.Top, writeRegion.Bottom, and bufferSize.Y
// are updated
// For each iteration of columns,
// - writeRegion.Left, writeRegion.Right and bufferSize.X are updated
writeRegion.Left = (short)origin.X;
COORD bufferSize;
bufferSize.X = (short)Math.Min(cols, bufferLimit);
bufferSize.Y = (short)Math.Min
(
rowsRemaining,
bufferLimit / bufferSize.X
);
writeRegion.Bottom = (short)(writeRegion.Top + bufferSize.Y - 1);
// atRow is at which row of contents a particular iteration is operating
int atRow = rows - rowsRemaining + contentsRegion.Top;
// number of columns yet to be written
int colsRemaining = cols;
while (colsRemaining > 0)
{
writeRegion.Right = (short)(writeRegion.Left + bufferSize.X - 1);
// atCol is at which column of contents a particular iteration is operating
int atCol = cols - colsRemaining + contentsRegion.Left;
// if this is not the last column iteration &&
// the leftmost BufferCell is a leading cell, don't write that cell
if (colsRemaining > bufferSize.X &&
contents[atRow, atCol + bufferSize.X - 1].BufferCellType == BufferCellType.Leading)
{
bufferSize.X--;
writeRegion.Right--;
}
CHAR_INFO[] characterBuffer = new CHAR_INFO[bufferSize.Y * bufferSize.X];
// copy characterBuffer to contents;
int characterBufferIndex = 0;
bool lastCharIsLeading = false;
BufferCell lastLeadingCell = new BufferCell();
for (int r = atRow; r < bufferSize.Y + atRow; r++)
{
for (int c = atCol; c < bufferSize.X + atCol; c++, characterBufferIndex++)
{
if (contents[r, c].BufferCellType == BufferCellType.Complete)
{
characterBuffer[characterBufferIndex].UnicodeChar =
(ushort)contents[r, c].Character;
characterBuffer[characterBufferIndex].Attributes =
(ushort)(ColorToWORD(contents[r, c].ForegroundColor, contents[r, c].BackgroundColor));
lastCharIsLeading = false;
}
else if (contents[r, c].BufferCellType == BufferCellType.Leading)
{
characterBuffer[characterBufferIndex].UnicodeChar =
(ushort)contents[r, c].Character;
characterBuffer[characterBufferIndex].Attributes =
(ushort)(ColorToWORD(contents[r, c].ForegroundColor, contents[r, c].BackgroundColor)
| (ushort)NativeMethods.CHAR_INFO_Attributes.COMMON_LVB_LEADING_BYTE);
lastCharIsLeading = true;
lastLeadingCell = contents[r, c];
}
else if (contents[r, c].BufferCellType == BufferCellType.Trailing)
{
// The FontFamily is a 8-bit integer. The low-order bit (bit 0) specifies the pitch of the font.
// If it is 1, the font is variable pitch (or proportional). If it is 0, the font is fixed pitch
// (or monospace). Bits 1 and 2 specify the font type. If both bits are 0, the font is a raster font;
// if bit 1 is 1 and bit 2 is 0, the font is a vector font; if bit 1 is 0 and bit 2 is set, or if both
// bits are 1, the font is true type. Bit 3 is 1 if the font is a device font; otherwise, it is 0.
// We only care about the bit 1 and 2, which indicate the font type.
// There are only two font type defined for the Console, at
// HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Console\.
// Console\Nls --- national language supports
// Console\RasterFonts --- raster type font
// Console\TrueTypeFont --- true type font
// For CJK characters, if it's TrueType, we need to output the trailing character marked with "Trailing_byte"
// attribute. But if it's RasterFont, we ignore the trailing character, and the "Leading_byte"/"Trailing_byte"
// attributes are not effective at all when reading the character from the console buffer.
if (lastCharIsLeading && trueTypeInUse)
{
// For TrueType Font, we output the trailing byte with "Trailing_byte" attribute
characterBuffer[characterBufferIndex].UnicodeChar = lastLeadingCell.Character;
characterBuffer[characterBufferIndex].Attributes =
(ushort)(ColorToWORD(contents[r, c].ForegroundColor, contents[r, c].BackgroundColor)
| (ushort)NativeMethods.CHAR_INFO_Attributes.COMMON_LVB_TRAILING_BYTE);
}
else
{
// We don't output anything for this cell if Raster font is in use, or if the last cell is not a leading byte
characterBufferIndex--;
}
lastCharIsLeading = false;
}
}
}
// Now writeRegion, bufferSize and characterBuffer are updated.
// Call NativeMethods.WriteConsoleOutput
bool result;
if ((rowType & BufferCellArrayRowType.RightLeading) != 0 &&
colsRemaining == bufferSize.X)
{
COORD bSize = bufferSize;
bSize.X++;
SMALL_RECT wRegion = writeRegion;
wRegion.Right++;
// Suppress the PreFAST warning about not using Marshal.GetLastWin32Error() to
// get the error code.
#pragma warning disable 56523
result = NativeMethods.WriteConsoleOutput(
consoleHandle.DangerousGetHandle(),
characterBuffer,
bSize,
bufferCoord,
ref wRegion);
}
else
{
// Suppress the PreFAST warning about not using Marshal.GetLastWin32Error() to
// get the error code.
#pragma warning disable 56523
result = NativeMethods.WriteConsoleOutput(
consoleHandle.DangerousGetHandle(),
characterBuffer,
bufferSize,
bufferCoord,
ref writeRegion);
}
if (result == false)
{
// When WriteConsoleOutput fails, half bufferLimit
if (bufferLimit < 2)
{
int err = Marshal.GetLastWin32Error();
HostException e = CreateHostException(err, "WriteConsoleOutput",
ErrorCategory.WriteError, ConsoleControlStrings.WriteConsoleOutputExceptionTemplate);
throw e;
}
bufferLimit /= 2;
if (cols == colsRemaining)
{
// if cols == colsRemaining, nothing is guaranteed written in this pass and
// the unwritten area is still rectangular
bufferSize.Y = 0;
break;
}
else
{
// some areas have been written. This could only happen when the number of columns
// to write is larger than bufferLimit. In that case, the algorithm writes one row
// at a time => bufferSize.Y == 1. Then, we can safely leave bufferSize.Y unchanged
// to retry with a smaller bufferSize.X.
Dbg.Assert(bufferSize.Y == 1, string.Format(CultureInfo.InvariantCulture, "bufferSize.Y should be 1, but is {0}", bufferSize.Y));
bufferSize.X = (short)Math.Min(colsRemaining, bufferLimit);
continue;
}
}
colsRemaining -= bufferSize.X;
writeRegion.Left += bufferSize.X;
bufferSize.X = (short)Math.Min(colsRemaining, bufferLimit);
} // column iteration
rowsRemaining -= bufferSize.Y;
writeRegion.Top += bufferSize.Y;
} // row iteration
}
private void Initialize(Runspace runspace, EngineIntrinsics engineIntrinsics)
{
_engineIntrinsics = engineIntrinsics;
_runspace = runspace;
if (!_delayedOneTimeInitCompleted)
{
DelayedOneTimeInitialize();
_delayedOneTimeInitCompleted = true;
}
_buffer.Clear();
_edits = new List <EditItem>();
_undoEditIndex = 0;
_editGroupStart = -1;
_current = 0;
_mark = 0;
_emphasisStart = -1;
_emphasisLength = 0;
_tokens = null;
_parseErrors = null;
_inputAccepted = false;
_initialX = _console.CursorLeft;
_initialY = _console.CursorTop - Options.ExtraPromptLineCount;
_initialBackgroundColor = _console.BackgroundColor;
_initialForegroundColor = _console.ForegroundColor;
_space = new CHAR_INFO(' ', _initialForegroundColor, _initialBackgroundColor);
_bufferWidth = _console.BufferWidth;
_killCommandCount = 0;
_yankCommandCount = 0;
_yankLastArgCommandCount = 0;
_tabCommandCount = 0;
_visualSelectionCommandCount = 0;
_statusIsErrorMessage = false;
_consoleBuffer = ReadBufferLines(_initialY, 1 + Options.ExtraPromptLineCount);
_lastRenderTime = Stopwatch.StartNew();
_killCommandCount = 0;
_yankCommandCount = 0;
_yankLastArgCommandCount = 0;
_tabCommandCount = 0;
_recallHistoryCommandCount = 0;
_visualSelectionCommandCount = 0;
_hashedHistory = null;
if (_getNextHistoryIndex > 0)
{
_currentHistoryIndex = _getNextHistoryIndex;
UpdateFromHistory(moveCursor: true);
_getNextHistoryIndex = 0;
if (_searchHistoryCommandCount > 0)
{
_searchHistoryPrefix = "";
if (Options.HistoryNoDuplicates)
{
_hashedHistory = new Dictionary <string, int>();
}
}
}
else
{
_searchHistoryCommandCount = 0;
}
}
public static extern bool ScrollConsoleScreenBuffer(IntPtr hConsoleOutput,
ref SMALL_RECT lpScrollRectangle,
IntPtr lpClipRectangle,
COORD dwDestinationOrigin,
ref CHAR_INFO lpFill);
