private static bool Execute_XLOG_Command(DataStream <int> ParameterStream)
{
/* Currently we are only emulating color codes. */
/* XXX: Implement emulation for other codes such as the cursor controls */
XLOG_CODE Code = (XLOG_CODE)Int32.MinValue;
if (!ParameterStream.atEnd)
{
Code = (XLOG_CODE)ParameterStream.Consume();
}
switch (Code)
{
case XLOG_CODE.PUSH_FG:
Color_Stack_FG.Push(ANSI.Color_Console_To_ANSI(Console.ForegroundColor));
break;
case XLOG_CODE.POP_FG:
{
if (Color_Stack_FG.Count == 0)
{
break;
}
ANSI_COLOR clr = Color_Stack_FG.Pop();
Console.ForegroundColor = ANSI.Color_ANSI_To_Console(clr);
}
break;
case XLOG_CODE.PUSH_BG:
Color_Stack_BG.Push(ANSI.Color_Console_To_ANSI(Console.BackgroundColor));
break;
case XLOG_CODE.POP_BG:
{
if (Color_Stack_BG.Count == 0)
{
break;
}
ANSI_COLOR clr = Color_Stack_BG.Pop();
Console.BackgroundColor = ANSI.Color_ANSI_To_Console(clr);
}
break;
default:
{
throw new ArgumentException($"Unrecognized xLOG code: {(XLOG_CODE)Code}");
}
}
return(true);
}
/// <summary>
/// Compiles a list of differences between the current text and some given text
/// </summary>
/// <param name="NewText"></param>
/// <returns>List of start/end ranges</returns>
public static LinkedList <TextDiff> Difference(StringPtr OldText, StringPtr NewText)
{
if ((OldText == null || OldText.Length <= 0) && (NewText == null || NewText.Length <= 0))
{
return(new LinkedList <TextDiff>());
}
else if ((OldText == null || OldText.Length <= 0) && NewText.Length > 0)
{
return(new LinkedList <TextDiff>(new TextDiff[] { new TextDiff(0, NewText.Length, EDiffType.Insertion) }));
}
else if ((NewText == null || NewText.Length <= 0) && OldText.Length > 0)
{
return(new LinkedList <TextDiff>(new TextDiff[] { new TextDiff(0, OldText.Length, EDiffType.Insertion) }));
}
var A = new DataStream <char>(OldText.AsMemory(), '\0');
var B = new DataStream <char>(NewText.AsMemory(), '\0');
var Chunks = new LinkedList <TextDiff>();
while (true)
{
if (A.Next != B.Next)/* Just entered a spot where the texts stopped matching */
{
var diff = TextDiff.Consume_Diff(A, B);
if (diff == null || diff.Length <= 0)
{/* No more diffs available */
return(Chunks);
}
/* Progress the spplicable stream by the difference ammount */
switch (diff.Type)
{
case EDiffType.Insertion:
{
B.Consume(diff.Length);
}
break;
case EDiffType.Removal:
{
A.Consume(diff.Length);
}
break;
case EDiffType.Mutation:
{
A.Consume(diff.Length);
B.Consume(diff.Length);
}
break;
default:
throw new NotImplementedException($"Handling for {nameof(EDiffType)} \"{diff.Type}\" has not been implemented!");
}
Chunks.AddLast(diff);
}
if (A.atEnd && B.atEnd)
{
break;
}
}
/* Check for text diff past the end of stream */
return(Chunks);
}
private static bool Execute_SGR_Command(DataStream <int> ParameterStream)
{
/* Currently we are only emulating color codes. */
/* XXX: Implement emulation for other codes such as the cursor controls */
SGR_CODE Code = SGR_CODE.INVALID;
if (!ParameterStream.atEnd)
{
Code = (SGR_CODE)ParameterStream.Consume();
}
switch (Code)
{
case SGR_CODE.RESET_STYLE:
{ /* All Attribute OFF */
bModeInvertVideo = false;
Color_Stack_FG.Clear();
Color_Stack_BG.Clear();
Console.ResetColor();
}
break;
case SGR_CODE.RESET_COLOR_FG:
{
var Defaults = Get_Console_Default_Colors();
var Clr = bModeInvertVideo ? Defaults.Item2 : Defaults.Item1;
Set_FG(Clr);
}
break;
case SGR_CODE.RESET_COLOR_BG:
{
var Defaults = Get_Console_Default_Colors();
var Clr = bModeInvertVideo ? Defaults.Item1 : Defaults.Item2;
Set_BG(Clr);
}
break;
case SGR_CODE.INVERT:
Set_Inverted(true);
break;
case SGR_CODE.INVERT_OFF:
Set_Inverted(false);
break;
/* 8-bit Colors */
case SGR_CODE.SET_COLOR_CUSTOM_FG:
{
if (ParameterStream.Remaining < 2)
{
throw new SgrFormatError($"Malformed command({Code}) requires atleast 2 parameters!");
}
ANSI_COLOR Clr = ANSI_COLOR.WHITE;
/* Read custom mode */
int mode = ParameterStream.Consume();
switch (mode)
{
case 2: /* 8-bit */
{
if (ParameterStream.Remaining < 3)
{
throw new SgrFormatError($"Malformed command. 8-bit colors require 3 parameters!");
}
}
break;
case 5: /* 4-bit */
Clr = (ANSI_COLOR)ParameterStream.Consume();
break;
default:
throw new SgrFormatError($"Malformed command. '{mode}' is not a valid mode for {Code}");
}
if (!bModeInvertVideo)
{
Set_FG(Clr);
}
else
{
Set_BG(Clr);
}
}
break;
case SGR_CODE.SET_COLOR_CUSTOM_BG:
{
if (ParameterStream.Remaining < 2)
{
throw new SgrFormatError($"Malformed command({Code}) requires atleast 2 parameters!");
}
ANSI_COLOR Clr = ANSI_COLOR.BLACK;
/* Read custom mode */
int mode = ParameterStream.Consume();
switch (mode)
{
case 2: /* 8-bit */
{
if (ParameterStream.Remaining < 3)
{
throw new SgrFormatError($"Malformed command. 8-bit colors require 3 parameters!");
}
}
break;
case 5: /* 4-bit */
Clr = (ANSI_COLOR)ParameterStream.Consume();
break;
default:
throw new SgrFormatError($"Malformed command. '{mode}' is not a valid mode for {Code}");
}
if (!bModeInvertVideo)
{
Set_BG(Clr);
}
else
{
Set_FG(Clr);
}
}
break;
/* 3/4-bit Colors */
case SGR_CODE n when(n >= SGR_CODE.SET_COLOR_FG && n <= SGR_CODE.SET_COLOR_FG + 7):
{
var Clr = (ANSI_COLOR)(n - SGR_CODE.SET_COLOR_FG);
if (!bModeInvertVideo)
{
Set_FG(Clr);
}
else
{
Set_BG(Clr);
}
}
break;
case SGR_CODE n when(n >= SGR_CODE.SET_COLOR_FG_BRIGHT && n <= SGR_CODE.SET_COLOR_FG_BRIGHT + 7):
{
var Clr = (ANSI_COLOR)(n - SGR_CODE.SET_COLOR_FG_BRIGHT);
if (!bModeInvertVideo)
{
Set_FG(Clr);
}
else
{
Set_BG(Clr);
}
}
break;
case SGR_CODE n when(n >= SGR_CODE.SET_COLOR_BG && n <= SGR_CODE.SET_COLOR_BG + 7):
{
var Clr = (ANSI_COLOR)(n - SGR_CODE.SET_COLOR_BG);
if (!bModeInvertVideo)
{
Set_BG(Clr);
}
else
{
Set_FG(Clr);
}
}
break;
case SGR_CODE n when(n >= SGR_CODE.SET_COLOR_BG_BRIGHT && n <= SGR_CODE.SET_COLOR_BG_BRIGHT + 7):
{
var Clr = (ANSI_COLOR)(n - SGR_CODE.SET_COLOR_BG_BRIGHT);
if (!bModeInvertVideo)
{
Set_BG(Clr);
}
else
{
Set_FG(Clr);
}
}
break;
default:
{
throw new ArgumentException($"Unrecognized (SelectGraphicRendition) code: {(SGR_CODE)Code}");
}
}
return(true);
}
private static bool Consume_CSI_Parameters(DataStream <char> Stream, out List <int> outCodes, out byte?outFinalByte)
{
var RetList = new List <int>(3);
byte?FinalByte = null;
/* Check if the stream is currently at a Control Sequence Initiator */
if (Stream.Next == ANSI.CSI && Stream.NextNext == '[')
{
Stream.Consume(2);/* Consume the CSI block start */
/* Extract the control sequence block */
var BlockStream = Stream.Substream(x => !Is_Final_Byte(Stream.Next) && Stream.Next != ANSI.CSI);
if (!Is_Final_Byte(Stream.Next))
{
throw new FormatException($"Malformed ANSI escape sequence. The sequence lacks a terminator character @ \"{BlockStream.AsMemory().ToString()}{Stream.Slice(0, 15).ToString()}\"");
}
FinalByte = (byte)Stream.Consume(); /* Consume CSI terminator */
/* Exctract all CSI block codes from the BlockStream */
if (!BlockStream.atEnd)
{
/* Extract the parameter bytes */
var ParamStream = BlockStream.Substream(x => Is_Parameter_Byte(x));
/* Consume all intermediate bytes */
/*if (!BlockStream.Consume_While(x => Is_Intermediate_Byte(x)))
* {
* //throw new FormatException($"Malformed ANSI escape sequence. Expected an intermidate character such as ';' @ \"{BlockStream.AsMemory().ToString()}{Stream.Slice(0, 15).ToString()}\"");
* }
*/
bool bLastWasDigit = false;
while (!ParamStream.atEnd)
{
int paramCode = 0;
if (char.IsDigit(ParamStream.Next))
{
if (!ParamStream.Consume_While(x => char.IsDigit(x), out ReadOnlyMemory <char> outDigits))
{
throw new Exception($"Unable to read from stream @ \"{ParamStream.AsMemory().ToString()}\"");
}
else
{
paramCode = Int32.Parse(outDigits.ToString());
}
RetList.Add(paramCode);
bLastWasDigit = true;
}
else
{
ParamStream.Consume();
if (!bLastWasDigit)
{
RetList.Add(paramCode);
}
bLastWasDigit = false;
}
}
}
}
outCodes = RetList;
outFinalByte = FinalByte;
return(true);
}