public void OnEscapeSequence(EscapeCommand command, ReadOnlySpan <byte> intermediates, IgnoredData ignored = default)
{
int index;
switch (command)
{
case EscapeCommand.ConfigureAsciiCharSet:
if (intermediates.Length > 0 &&
TryParseCharSetIndex(intermediates[0], out index))
{
_activeCharSets[index] = CharSet.Ascii;
}
break;
case EscapeCommand.ConfigureSpecialCharSet:
if (intermediates.Length > 0 &&
TryParseCharSetIndex(intermediates[0], out index))
{
_activeCharSets[index] = CharSet.SpecialCharacterAndLineDrawing;
}
break;
case EscapeCommand.LineFeed:
_events.LineFeed?.Invoke();
break;
case EscapeCommand.NextLine:
_events.LineFeed?.Invoke();
_events.CarriageReturn?.Invoke();
break;
case EscapeCommand.ReverseIndex:
_events.ReverseIndex?.Invoke();
break;
case EscapeCommand.IdentifyTerminal:
_events.IdentifyTerminal?.Invoke();
break;
case EscapeCommand.ResetState:
_events.ResetState?.Invoke();
break;
case EscapeCommand.SaveCursorPosition:
_events.SaveCursorPosition?.Invoke();
break;
case EscapeCommand.DecTest when(intermediates.Length != 0 && intermediates[0] == '#'):
_events.DecTest?.Invoke();
break;
case EscapeCommand.RestoreCursorPosition when(intermediates.Length == 0 || intermediates[0] != '#'):
_events.RestoreCursorPosition?.Invoke();
break;
case EscapeCommand.SetKeypadApplicationMode:
_events.SetKeypadApplicationMode?.Invoke();
break;
case EscapeCommand.UnsetKeypadApplicationMode:
_events.UnsetKeypadApplicationMode?.Invoke();
break;
}
}
public void OnControlSequenceCommand(ControlSequenceCommand command, ReadOnlySpan <byte> intermediates, ReadOnlySpan <long> parameters, IgnoredData ignored = default)
{
var priv = intermediates.Optional(0).GetValueOrDefault(0) == '?';
long?row, column;
switch (command)
{
case ControlSequenceCommand.InsertBlank:
_events.InsertBlank?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.MoveUp:
_events.MoveUp?.Invoke(parameters.Optional(0).GetValueOrDefault(1), false);
break;
case ControlSequenceCommand.RepeatPrecedingCharacter:
if (_precedingChar.HasValue)
{
var count = parameters.Optional(0).GetValueOrDefault(1);
var c = _precedingChar.Value;
ReadOnlySpan <char> chr = MapCharacters(MemoryMarshal.CreateReadOnlySpan(ref c, 1));
for (var i = 0; i < count; i++)
{
_events.Input?.Invoke(chr);
}
}
break;
case ControlSequenceCommand.MoveDown1:
case ControlSequenceCommand.MoveDown2:
_events.MoveDown?.Invoke(parameters.Optional(0).GetValueOrDefault(1), false);
break;
case ControlSequenceCommand.IdentifyTerminal:
_events.IdentifyTerminal?.Invoke();
break;
case ControlSequenceCommand.MoveForward1:
case ControlSequenceCommand.MoveForward2:
_events.MoveForward?.Invoke(parameters.Optional(0).GetValueOrDefault(1), false);
break;
case ControlSequenceCommand.MoveBackward:
_events.MoveBackward?.Invoke(parameters.Optional(0).GetValueOrDefault(1), false);
break;
case ControlSequenceCommand.MoveDownAndCr:
_events.MoveDown?.Invoke(parameters.Optional(0).GetValueOrDefault(1), true);
break;
case ControlSequenceCommand.MoveUpAndCr:
_events.MoveUp?.Invoke(parameters.Optional(0).GetValueOrDefault(1), true);
break;
case ControlSequenceCommand.ClearTabulation:
var tabClearMode = (TabulationClearMode)parameters.Optional(0).GetValueOrDefault(0);
_events.ClearTabulation?.Invoke(tabClearMode);
break;
case ControlSequenceCommand.GotoColumn1:
case ControlSequenceCommand.GotoColumn2:
column = parameters.Optional(0).GetValueOrDefault(1) - 1;
_events.Goto?.Invoke(column: column);
break;
case ControlSequenceCommand.Goto1:
case ControlSequenceCommand.Goto2:
column = parameters.Optional(0).GetValueOrDefault(1) - 1;
row = parameters.Optional(1).GetValueOrDefault(1) - 1;
_events.Goto?.Invoke(column, row);
break;
case ControlSequenceCommand.MoveForwardTabs:
_events.MoveForward?.Invoke(parameters.Optional(0).GetValueOrDefault(1), true);
break;
case ControlSequenceCommand.ClearScreen:
var clearScreenMode = (ClearMode)parameters.Optional(0).GetValueOrDefault(0);
_events.ClearScreen?.Invoke(clearScreenMode);
break;
case ControlSequenceCommand.ClearLine:
var clearLineMode = (LineClearMode)parameters.Optional(0).GetValueOrDefault(0);
_events.ClearLine?.Invoke(clearLineMode);
break;
case ControlSequenceCommand.ScrollUp:
_events.ScrollUp?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.ScrollDown:
_events.ScrollDown?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.InsertBlankLines:
_events.InsertBlankLines?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.UnsetMode:
for (var i = 0; i < parameters.Length; i++)
{
_events.UnsetMode?.Invoke((Mode)parameters[i]);
}
break;
case ControlSequenceCommand.DeleteLines:
_events.DeleteLines?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.EraseChars:
_events.EraseCharacters?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.DeleteChars:
_events.DeleteCharacters?.Invoke(parameters.Optional(0).GetValueOrDefault(1));
break;
case ControlSequenceCommand.MoveBackwardTabs:
_events.MoveBackward?.Invoke(parameters.Optional(0).GetValueOrDefault(1), true);
break;
case ControlSequenceCommand.GotoLine:
_events.Goto?.Invoke(line: parameters.Optional(0).GetValueOrDefault(1) - 1);
break;
case ControlSequenceCommand.SetMode:
for (var i = 0; i < parameters.Length; i++)
{
_events.SetMode?.Invoke((Mode)parameters[i]);
}
break;
case ControlSequenceCommand.TerminalAttribute:
if (parameters.Length == 0)
{
_events.TerminalAttribute?.Invoke(
TerminalAttribute.Reset);
break;
}
for (var i = 0; i < parameters.Length; i++)
{
var index = parameters[i];
if (index < 30)
{
_events.TerminalAttribute?.Invoke(
(TerminalAttribute)index);
continue;
}
if (index == 38 || index == 48)
{
var consumed = TryParseColor(parameters.Slice(i), out NamedColor? ix, out Color? color);
if (consumed == 0)
{
break;
}
_events.TerminalAttribute?.Invoke(
(TerminalAttribute)index, index: ix, color: color);
i += consumed;
continue;
}
if (index == 39)
{
_events.TerminalAttribute?.Invoke(
TerminalAttribute.SetForeground, index: NamedColor.Foreground);
continue;
}
if (index < 40)
{
var ix = (NamedColor)(index - 30);
_events.TerminalAttribute?.Invoke(
TerminalAttribute.SetForeground, index: ix);
continue;
}
if (index == 49)
{
_events.TerminalAttribute?.Invoke(
TerminalAttribute.SetBackground, index: NamedColor.Background);
continue;
}
if (index < 50)
{
var ix = (NamedColor)(index - 40);
_events.TerminalAttribute?.Invoke(
TerminalAttribute.SetForeground, index: ix);
continue;
}
if (index < 90)
{
continue;
}
if (index < 100)
{
var ix = (NamedColor)(index - 90 + (int)NamedColor.BrightBlack);
_events.TerminalAttribute?.Invoke(
TerminalAttribute.SetForeground, index: ix);
continue;
}
if (index < 108)
{
var ix = (NamedColor)(index - 100 + (int)NamedColor.BrightBlack);
_events.TerminalAttribute?.Invoke(
TerminalAttribute.SetBackground, index: ix);
continue;
}
}
break;
case ControlSequenceCommand.DeviceStatus:
_events.DeviceStatus?.Invoke(parameters.Optional(0).GetValueOrDefault(0));
break;
case ControlSequenceCommand.SetScrollingRegion:
if (priv)
{
break;
}
_events.SetScrollingRegion?.Invoke(
parameters.Optional(0) - 1,
parameters.Optional(1) - 1);
break;
case ControlSequenceCommand.SaveCursorPosition:
_events.SaveCursorPosition?.Invoke();
break;
case ControlSequenceCommand.RestoreCursorPosition:
_events.RestoreCursorPosition?.Invoke();
break;
case ControlSequenceCommand.SetCursorStyle:
switch (parameters.Optional(0).GetValueOrDefault(0))
{
case 0: _events.SetCursorStyle?.Invoke(default); break;
case 1:
case 2: _events.SetCursorStyle?.Invoke(CursorStyle.Block); break;
case 3:
case 4: _events.SetCursorStyle?.Invoke(CursorStyle.Underline); break;
case 5:
case 6: _events.SetCursorStyle?.Invoke(CursorStyle.Beam); break;
}
break;
}
}
public void OnOsCommand(OsCommand command, ReadOnlySpan <ReadOnlyMemory <byte> > parameters, IgnoredData ignored = default)
{
Color color;
ReadOnlySpan <char> characters;
switch (command)
{
case OsCommand.SetWindowIconAndTitle:
case OsCommand.SetWindowTitle:
// Set window title.
if (parameters.Length > 0 &&
_utf8(parameters[0].Span, out characters))
{
_events.SetTitle?.Invoke(characters);
}
break;
case OsCommand.SetWindowIcon: break;
case OsCommand.SetColor:
// Set color index.
if (parameters.Length % 2 != 0)
{
break;
}
for (var i = 0; i < parameters.Length; i += 2)
{
if (TryParseByte(parameters[i].Span, out var index) &&
TryParseColor(parameters[i + 1].Span, out color))
{
_events.SetColor?.Invoke((NamedColor)index, color);
}
}
break;
case OsCommand.SetForegroundColor:
if (parameters.Length > 0 &&
TryParseColor(parameters[0].Span, out color))
{
_events.SetColor?.Invoke(NamedColor.Foreground, color);
}
break;
case OsCommand.SetBackgroundColor:
if (parameters.Length > 0 &&
TryParseColor(parameters[0].Span, out color))
{
_events.SetColor?.Invoke(NamedColor.Background, color);
}
break;
case OsCommand.SetCursorColor:
if (parameters.Length > 0 &&
TryParseColor(parameters[0].Span, out color))
{
_events.SetColor?.Invoke(NamedColor.Cursor, color);
}
break;
case OsCommand.SetCursorStyle:
if (parameters.Length > 0 && parameters[0].Length > _cursorShape.Length &&
parameters[0].Span.Slice(0, _cursorShape.Length).SequenceEqual(_cursorShape))
{
switch ((CursorStyle)(parameters[0].Span[12] - (byte)'0'))
{
case CursorStyle.Beam:
_events.SetCursor?.Invoke(CursorStyle.Beam);
break;
case CursorStyle.Block:
_events.SetCursor?.Invoke(CursorStyle.Block);
break;
case CursorStyle.Underline:
_events.SetCursor?.Invoke(CursorStyle.Underline);
break;
}
}
break;
case OsCommand.SetClipboard:
if (parameters.Length > 1 &&
(parameters[1].Length == 0 || parameters[1].Span[0] != '?') &&
TryParseBase64(parameters[1].Span, out ReadOnlySpan <byte> base64) &&
_utf8(base64, out characters))
{
_events.SetClipboard?.Invoke(characters);
}
break;
case OsCommand.ResetColor:
if (parameters.Length == 0)
{
for (var i = 0; i < 257; i++)
{
_events.ResetColor?.Invoke((NamedColor)i);
}
break;
}
for (var i = 0; i < parameters.Length; i++)
{
if (TryParseByte(parameters[i].Span, out var index))
{
_events.ResetColor?.Invoke((NamedColor)index);
}
}
break;
case OsCommand.ResetForegroundColor:
_events.ResetColor?.Invoke(NamedColor.Foreground);
break;
case OsCommand.ResetBackgroundColor:
_events.ResetColor?.Invoke(NamedColor.Background);
break;
case OsCommand.ResetCursorColor:
_events.ResetColor?.Invoke(NamedColor.Cursor);
break;
}
}
