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ans2html.vbs
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ans2html.vbs
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'! ANSI-To-HTML Converter
'! (ans2html.vbs)
'! Author: Craig Hendricks (aka Codefenix)
'! Initial Version: 3/15/2021
'! Updated: 4/26/2023
'! ============================================================================
'!
'! Description:
'!
'! This VBScript is for converting an ANSI file to a HTML file. Useful for
'! displaying BBS door game scores on a website.
'!
'! Also optionally supports other common coloring schemes:
'! - Pipes |
'! - Tildes ~
'! - RTSoft ` codes (LoRD, LoRD2, TEOS, and others)
'! - Yankee Trader Galactic Newspaper
'!
'! It reads each character from a standard ANSI source file and generates
'! a file containing HTML5 markup. It interprets most ANSI escape codes
'! and translates all 255 codepage 437 characters to the best matching
'! equivalent HTML entity.
'! See: https://en.wikipedia.org/wiki/Code_page_437
'!
'! After reading the ANSI source data, the script will first "flatten" it,
'! eliminating all cursor movement sequences so that it need only convert
'! the "m" escape sequences for in-line text coloring. This flattening does
'! not occur if the using the pipe, tilde, RTSoft, or Yankee Trader
'! conversion modes.
'!
'! The IBM VGA font from the Ultimate Oldschool PC Font Pack is the optimal
'! font to use for displaying CP437 characters in browsers. Download it from
'! https://int10h.org/oldschool-pc-fonts/download and set it up as a webfont
'! on your site. If this font is not present, web browsers will default to
'! whatever default monospace font is configured, leading to mixed results
'! for box and line drawing characters, especially on mobile browsers.
'!
'! The "Source Code Pro" font is another good monospace font that gives nice
'! results. Download it from https://github.com/adobe-fonts/source-code-pro.
'!
'! Blinking text is achieved using keyframes, setting the color:hsla property
'! in CSS. Use either "linear" to "step-end" in the CSS animation properties
'! for a gentle fade or sharp flash.
'!
'! Usage:
'!
'! cscript ans2html.vbs path_to_ansi.ans path_to_html.html [page_title] [opts]
'!
'! The "opts" can be any or all processing modes:
'!
'! P: Pipe codes
'! T: Tilde codes
'! L: RTSoft "LoRD" codes
'! Y: Yankee Trader Galactic Newspaper bulletin prefixes
'!
'! You must specify a page title if using one of the optional processing modes.
'!
'! Example:
'!
'! cscript ans2html.vbs c:\lord\LOGNOW.TXT c:\web\lord_news.html "LorD News" L
'!
'! Probably goes without saying, but paths containing spaces must be wrapped
'! in double-quotes.
'!
'! Enjoy!
'!
Option Explicit
On Error Resume Next
' Constants -------------------------------------------------------------------
Const FOR_READING = 1, FOR_WRITING = 2, FOR_APPEND = 8
' HTML hex values for the 16 ANSI text mode colors.
'! @see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
Const BLACK = "#000"
Const RED = "#A00"
Const GREEN = "#0A0"
Const BROWN = "#A50" ' low-intensity yellow
Const BLUE = "#00A"
Const MAGENTA = "#A0A"
Const CYAN = "#0AA"
Const GRAY = "#AAA" ' low-intensity white
Const DARKGRAY = "#555" ' high-intensity black
Const LIGHTRED = "#F55"
Const LIGHTGREEN = "#5F5"
Const YELLOW = "#FF5"
Const LIGHTBLUE = "#55F"
Const LIGHTMAGENTA = "#F5F"
Const LIGHTCYAN = "#5FF"
Const WHITE = "#FFF"
' Best font for displaying CP437 ANSI.
Const FONT_FAMILY = "Web437 IBM VGA"
Const FONT_PATH = "../styles/web437-ibm-vga.css"
' Variables Description -----------------------------------------------
Dim CSI ' See: https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences
Dim args ' Incoming arguments
Dim fso ' FileSystemObject
Dim fAnsiSource ' ANSI source file object
Dim sourceFile ' ANSI source filename
Dim targetFile ' HTML output filename
Dim title ' Title of HTML output file
Dim ansiData ' Contents of ANSI source file
Dim charAtI ' Character At I
Dim charCode ' ASCII code of character at I
Dim escapeSequence ' ANSI escape code
Dim csiFinalByte ' Function of the ANSI escape sequence
Dim csiParams ' Parameters of the ANSI escape sequence
Dim sgrParam ' SGR (select graphic rendition) parameter
Dim spanTag ' <span> tag to be written
Dim blink ' CSS blink class
Dim bgColor ' HTML Background color
Dim fgColor ' HTML Foreground color
Dim fgIntensity ' Foreground intensity
Dim swapColor ' Swap foreground and background colors
Dim holdColor ' Variable for holding a color if swapping
Dim startPos ' Reading start position. For now just 1.
Dim colPos ' Output column number. Used for auto-wrapping the output.
Dim ignoreLF ' Ignore line feeds
Dim i ' Main loop counter
Dim oStream ' Output stream
Dim convertOptions ' Argument for conversion options
Dim convertPipes ' P - Convert pipe codes? Boolean
Dim convertTildes ' T - Convert tilde codes? Boolean
Dim convertLord ' L - Convert LoRD codes? Boolean
Dim convertYT ' Y - Colorize Yankee Trader bulletins? Boolean
Dim cp437html ' Array for holding HTML entities for the CP437 ANSI chars
' Initialize Start-------------------------------------------------------------
cp437html = Array ("", _
"☺","☻","♥","♦","♣","♠",_
"•","◘","○","◙","♂","♀", _
"♪","♫","☼","►","◀","↕", _
"‼","¶","§","▬","↨","↑", _
"↓","→","←","∟","↔","▲", _
"▼"," ","!",""","#","$","%","&", _
"'","(",")","*","+",",","-",".","/", _
"0","1","2","3","4","5","6","7","8", _
"9",":",";","<","=",">","?","@","A", _
"B","C","D","E","F","G","H","I","J", _
"K","L","M","N","O","P","Q","R","S", _
"T","U","V","W","X","Y","Z","[","\", _
"]","^","_","`","a","b","c","d","e", _
"f","g","h","i","j","k","l","m", _
"n","o","p","q","r","s","t","u", _
"v","w","x","y","z","{","|","}", _
"~","⌂","Ç","ü","é","â","ä", _
"à","å","ç","ê","ë","è", _
"ï","î","ì","Ä","Å","É", _
"æ","Æ","ô","ö","ò","û", _
"ù","ÿ","Ö","Ü","¢","£", _
"¥","₧","ƒ","á","í","ó", _
"ú","ñ","Ñ","ª","º","¿", _
"⌐","¬","½","¼","¡","«", _
"»","░","▒","▓","│","┤", _
"╡","╢","╖","╕","╣","║", _
"╗","╝","╜","╛","┐","└", _
"┴","┬","├","─","┼","╞", _
"╟","╚","╔","╩","╦","╠", _
"═","╬","╧","╨","╤","╥", _
"╙","╘","╒","╓","╫","╪", _
"┘","┌","█","▄","▌","▐", _
"▀","α","ß","Γ","π","Σ", _
"σ","µ","τ","Φ","Θ","Ω", _
"δ","∞","φ","ε","∩","≡", _
"±","≥","≤","⌠","⌡","÷", _
"≈","°","∙","·","√","ⁿ", _
"²","■","")
convertPipes = False
convertTildes = False
convertLord = False
convertYT = False
CSI = chr(27) & "["
startPos = 1
colPos = 0
fgIntensity = 0
fgColor = GRAY
bgColor = BLACK
ignoreLF = False
Set args = Wscript.Arguments
sourceFile = args(0)
targetFile = args(1)
title = args(2)
convertOptions = UCase(args(3))
If InStr(convertOptions, "P") >= 1 Then
convertPipes = True
Wscript.echo "Pipe color conversion enabled"
End If
If InStr(convertOptions, "T") >= 1 Then
convertTildes = True
Wscript.echo "Tilde color conversion enabled"
End If
If InStr(convertOptions, "L") >= 1 Then
convertLord = True
Wscript.echo "LoRD color conversion enabled"
End If
If InStr(convertOptions, "Y") >= 1 Then
convertYT = True
Wscript.echo "Yankee Trader colorizing enabled"
End If
Set fso = CreateObject("Scripting.FileSystemObject")
' Initialize End --------------------------------------------------------------
If fso.FileExists(sourceFile) Then
Wscript.echo title
Set oStream = CreateObject("ADODB.Stream")
oStream.charSet = "ASCII"
oStream.Open
oStream.WriteText "<!DOCTYPE html>" & vbCrlf & "<html lang='en'>" & vbCrlf & _
"<head>" & vbCrlf & "<meta charset='UTF-8'>" & vbCrlf & "<title>" & title & "</title>" & vbCrlf & _
"<style>" & vbCrlf & ".blink{animation:blinker 0.8s infinite step-end;}" & vbCrlf & "@keyframes blinker{50%{color:hsla(0,0%,0%,0.0);}}" & vbCrlf & "</style>" & vbCrlf & _
"<link rel='stylesheet' type='text/css' href='" & FONT_PATH & "'>" & vbCrlf & "</head>" & vbCrlf & _
"<body style='color:" & fgColor & ";background-color:" & bgColor & ";'>" & _
"<!-- " & title & " file generated on " & Now & " -->" & vbCrlf & _
"<pre style='font-family:""" & FONT_FAMILY & """,monospace;'>" & vbCrLf
' Open the ANSI source file.
Set fAnsiSource = fso.OpenTextFile(sourceFile, FOR_READING, False, 0)
If convertOptions = "" Then
ansiData = FlattenAnsi(fAnsiSource.ReadAll)
Else
ansiData = fAnsiSource.ReadAll
End If
fAnsiSource.Close
' This simply inserts some pipe codes for Yankee Trader's galactic newspaper
' bulletin, and then those pipe codes get converted.
If convertYT Then
ansiData = Replace(ansiData, vbCrLf & " *** ", vbCrLf & "|09 *** ") ' attacks
ansiData = Replace(ansiData, vbCrLf & " +++ ", vbCrLf & "|12 +++ ") ' xannor defeats
ansiData = Replace(ansiData, vbCrLf & " - ", vbCrLf & "|14 - ") ' planetary headlines
ansiData = Replace(ansiData, vbCrLf & "-=*=-", vbCrLf & "|15-=*=-") ' Logons
ansiData = Replace(ansiData, vbCrLf, vbCrLf & "|02") ' standard newspaper color
convertPipes = True
End If
' Begin reading the ANSI contents
For i = startPos To Len(ansiData)
charAtI = Mid(ansiData, i, 1)
charCode = Asc(charAtI)
' Wrap at 80 columns...
' If this is the 80th OUTPUT character, and the next INPUT character is
' NOT a CR or LF, we need to add a <br/> here now.
If colPos = 80 Then
colPos = 0
If charCode <> 13 and charCode <> 10 Then
oStream.WriteText vbCrlf
End If
End If
If charCode = 13 Then
ignoreLF = True
oStream.WriteText vbCrlf
colPos = 0
ElseIf charCode = 10 Then
If ignoreLF = False Then
oStream.WriteText vbCrlf
colPos = 0
End If
ElseIf charCode = 32 Then
oStream.WriteText " "
colPos = colPos + 1
ElseIf charCode = 0 Then
oStream.WriteText " "
colPos = colPos + 1
ElseIf charAtI = "<" Then
oStream.WriteText "<"
colPos = colPos + 1
ElseIf charAtI = ">" Then
oStream.WriteText ">"
colPos = colPos + 1
ElseIf charAtI = "&" Then
oStream.WriteText "&"
colPos = colPos + 1
ElseIf charAtI = "'" Then
oStream.WriteText "'"
colPos = colPos + 1
ElseIf charAtI = """" Then
oStream.WriteText """
colPos = colPos + 1
ElseIf Mid(ansiData, i, 2) = CSI Then
' Terminate the previous span tag if one was started.
If spanTag <> "" Then
oStream.WriteText "</span>"
End If
' Locate the next alpha after this point
escapeSequence = Mid(ansiData, i, InStrNextAlpha(i, ansiData, csiFinalByte) - i)
csiParams = Mid(escapeSequence, 3)
i = i + Len(escapeSequence) ' Advance the parser.
Select Case csiFinalByte
' See: http://ascii-table.com/ansi-escape-sequences.php
' https://en.wikipedia.org/wiki/ANSI_escape_code#Terminal_output_sequences
'
' Only "m" is implemented here. The rest are all implemented in
' the FlattenAnsi function.
Case "m"
' Set Graphics Mode
' See: https://en.wikipedia.org/wiki/ANSI_escape_code#SGR
For Each sgrParam In Split(csiParams, ";")
Select Case sgrParam
Case 0
fgIntensity = 0
blink = ""
swapColor = 0
bgColor = BLACK
fgColor = GRAY
Case 1
fgIntensity = 1
Case 3
' Italic. Sometimes treated as inverse (Swap colors?).
swapColor = 1
Case 5
blink = "class='blink' "
Case 7
swapColor = 1
Case 30
fgColor = BLACK
Case 31
fgColor = RED
Case 32
fgColor = GREEN
Case 33
fgColor = BROWN
Case 34
fgColor = BLUE
Case 35
fgColor = MAGENTA
Case 36
fgColor = CYAN
Case 37
fgColor = GRAY
Case 40
bgColor = BLACK
Case 41
bgColor = RED
Case 42
bgColor = GREEN
Case 43
bgColor = BROWN
Case 44
bgColor = BLUE
Case 45
bgColor = MAGENTA
Case 46
bgColor = CYAN
Case 47
bgColor = GRAY
End Select
Next
If swapColor = 1 Then
holdColor = fgColor
fgColor = bgColor
bgColor = holdColor
End If
spanTag = "<span " & blink & "style='color:" & SetColorIntensity(fgColor, fgIntensity) & ";background-color:" & bgColor & ";'>"
End Select
oStream.WriteText spanTag
ElseIf charAtI = "|" And convertPipes Then
' Terminate the previous span tag if one was started.
If spanTag <> "" Then
oStream.WriteText "</span>"
End If
' The following pulled from "How to use Color" secion in Jezebel's INSTRUCT.DOC file:
' =====================================================================
' Renegade's colors....
' You take a pipe, | (it's that thing above your \ key) and a number between
' 01 and 15, MAKE SURE it's 2 digits, not |1, it has to be |01.. ;)
' 01 is Blue 02 is green 03 is cyan 04 is red 05 is magenta 06 is brown
' 07 is grey 08 lt black 09 lt blue 10 lt green 11 lt cyan 12 lt red
' 13 lt magenta 14 yellow 15 white
' |03This would be Cyan
Select Case Mid(ansiData, i + 1, 2)
Case "00"
fgColor = BLACK
fgIntensity = 0
blink = ""
Case "01"
fgColor = BLUE
fgIntensity = 0
blink = ""
Case "02"
fgColor = GREEN
fgIntensity = 0
blink = ""
Case "03"
fgColor = CYAN
fgIntensity = 0
blink = ""
Case "04"
fgColor = RED
fgIntensity = 0
blink = ""
Case "05"
fgColor = MAGENTA
fgIntensity = 0
blink = ""
Case "06"
fgColor = BROWN
fgIntensity = 0
blink = ""
Case "07"
fgColor = GRAY
fgIntensity = 0
blink = ""
Case "08"
fgColor = BLACK
fgIntensity = 1
blink = ""
Case "09"
fgColor = BLUE
fgIntensity = 1
blink = ""
Case "10"
fgColor = GREEN
fgIntensity = 1
blink = ""
Case "11"
fgColor = CYAN
fgIntensity = 1
blink = ""
Case "12"
fgColor = RED
fgIntensity = 1
blink = ""
Case "13"
fgColor = MAGENTA
fgIntensity = 1
blink = ""
Case "14"
fgColor = BROWN
fgIntensity = 1
blink = ""
Case "15"
fgColor = GRAY
fgIntensity = 1
blink = ""
Case "16"
bgColor = BLACK
Case "17"
bgColor = BLUE
Case "18"
bgColor = GREEN
Case "19"
bgColor = CYAN
Case "20"
bgColor = RED
Case "21"
bgColor = MAGENTA
Case "22"
bgColor = BROWN
Case "23"
bgColor = GRAY
Case "24"
fgColor = BLACK
fgIntensity = 1
blink = "class='blink' "
Case "25"
fgColor = BLUE
fgIntensity = 1
blink = "class='blink' "
Case "26"
fgColor = GREEN
fgIntensity = 1
blink = "class='blink' "
Case "27"
fgColor = CYAN
fgIntensity = 1
blink = "class='blink' "
Case "28"
fgColor = RED
fgIntensity = 1
blink = "class='blink' "
Case "29"
fgColor = MAGENTA
fgIntensity = 1
blink = "class='blink' "
Case "30"
fgColor = BROWN
fgIntensity = 1
blink = "class='blink' "
Case "31"
fgColor = GRAY
fgIntensity = 1
blink = "class='blink' "
Case "AL" ' Begin DARKNESS colors
fgColor = RED
fgIntensity = 1
blink = ""
Case "DE" '
fgColor = BLACK
fgIntensity = 1
blink = ""
Case "DI" '
fgColor = BLACK
fgIntensity = 1
blink = ""
Case "DT" '
fgColor = GRAY
fgIntensity = 0
blink = ""
Case "LT" '
fgColor = GRAY
fgIntensity = 1
blink = ""
Case "H1"
fgColor = BROWN
fgIntensity = 1
blink = ""
Case "H2" '
fgColor = CYAN
fgIntensity = 0
blink = ""
Case "TI"
fgColor = GRAY
fgIntensity = 1
blink = ""
Case "IN"
fgColor = GREEN
fgIntensity = 1
blink = ""
End Select
i = i + 2 ' Advance the parser.
spanTag = "<span " & blink & "style='color:" & SetColorIntensity(fgColor, fgIntensity) & ";background-color:" & bgColor & ";'>"
oStream.WriteText spanTag
ElseIf charAtI = "~" And convertTildes Then
' Terminate the previous span tag if one was started.
If spanTag <> "" Then
oStream.WriteText "</span>"
End If
' The following pulled from "Special Control Codes" secion in SYSOP.DOC
' of Death Masters:
' =====================================================================
' + Special Control Codes
' There are MANY control codes in this file. Most of them are forbidden to
' you. The only ones you can fool around with are:
' ~1 Change text to GREEN until a new ~# sequence is found
' ~2 Change text to BLUE until a new ~# sequence is found
' ~3 Change text to CYAN until a new ~# sequence is found
' ~4 Change text to RED until a new ~# sequence is found
' ~5 Change text to MAGENTA until a new ~# sequence is found
' ~6 Change text to BROWN until a new ~# sequence is found
' ~7 Change text to LIGHT GREY until a new ~# sequence is found
' ~8 Change text to DARK GREY until a new ~# sequence is found
' ~9 Change text to BRIGHT BLUE until a new ~# sequence is found
' ~a Change text to BRIGHT GREEN until a new ~# sequence is found
' ~b Change text to BRIGHT CYAN until a new ~# sequence is found
' ~c Change text to BRIGHT RED a new ~# sequence is found
' ~d Change text to BRIGHT MAGENTA until a new ~# sequence is found
' ~e Change text to YELLOW a new ~# sequence is found
' ~f Change text to BRIGHT WHITE until a new ~# sequence is found
Select Case Mid(ansiData, i + 1, 1)
Case "1"
fgColor = GREEN
fgIntensity = 0
Case "2"
fgColor = BLUE
fgIntensity = 0
Case "3"
fgColor = CYAN
fgIntensity = 0
Case "4"
fgColor = RED
fgIntensity = 0
Case "5"
fgColor = MAGENTA
fgIntensity = 0
Case "6"
fgColor = BROWN
fgIntensity = 0
Case "7"
fgColor = GRAY
fgIntensity = 0
Case "8"
fgColor = BLACK
fgIntensity = 1
Case "9"
fgColor = BLUE
fgIntensity = 1
Case "a"
fgColor = GREEN
fgIntensity = 1
Case "b"
fgColor = CYAN
fgIntensity = 1
Case "c"
fgColor = RED
fgIntensity = 1
Case "d"
fgColor = MAGENTA
fgIntensity = 1
Case "e"
fgColor = BROWN
fgIntensity = 1
Case "f"
fgColor = GRAY
fgIntensity = 1
End Select
i = i + 1 ' Advance the parser.
spanTag = "<span " & blink & "style='color:" & SetColorIntensity(fgColor, fgIntensity) & ";background-color:" & bgColor & ";'>"
oStream.WriteText spanTag
ElseIf charAtI = "`" And convertLord Then
' Terminate the previous span tag if one was started.
If spanTag <> "" Then
oStream.WriteText "</span>"
End If
' The following pulled from "Screen Commands" secion in LADY.DOC:
' =====================================================================
' foreground color -
' `1 dark blue `6 brownish `! light cyan and seldom used
' `2 dark green `7 grey `@ light red `^ black
' `3 dark cyan `8 dark grey `# light violet
' `4 dark red `9 light blue `$ yellow
' `5 dark violet `0 light green `% white
' ** Note.. The black foreground here is only available here. Lady authors
' are expected to use it wisely..
' background color -
' `r0 black `r4 dark red
' `r1 dark blue `r5 dark violet
' `r2 dark green `r6 brownish
' `r3 dark cyan `r7 grey
Select Case Mid(ansiData, i + 1, 1)
Case "."
' Apparently an undocumented reset.
fgIntensity = 0
bgColor = BLACK
fgColor = GRAY
Case "1"
fgColor = BLUE
fgIntensity = 0
Case "2"
fgColor = GREEN
fgIntensity = 0
Case "3"
fgColor = CYAN
fgIntensity = 0
Case "4"
fgColor = RED
fgIntensity = 0
Case "5"
fgColor = MAGENTA
fgIntensity = 0
Case "6"
fgColor = BROWN
fgIntensity = 0
Case "7"
fgColor = GRAY
fgIntensity = 0
Case "8"
fgColor = BLACK
fgIntensity = 1
Case "9"
fgColor = BLUE
fgIntensity = 1
Case "0"
fgColor = GREEN
fgIntensity = 1
Case "!"
fgColor = CYAN
fgIntensity = 1
Case "@"
fgColor = RED
fgIntensity = 1
Case "#"
fgColor = MAGENTA
fgIntensity = 1
Case "$"
fgColor = BROWN
fgIntensity = 1
Case "%"
fgColor = GRAY
fgIntensity = 1
Case "^"
fgColor = BLACK
fgIntensity = 0
Case "r"
' Select the NEXT character for the background color.
Select Case Mid(ansiData, i + 2, 1)
Case "0"
bgColor = BLACK
Case "1"
bgColor = BLUE
Case "2"
bgColor = GREEN
Case "3"
bgColor = CYAN
Case "4"
bgColor = RED
Case "5"
bgColor = MAGENTA
Case "6"
bgColor = BROWN
Case "7"
bgColor = GRAY
End Select
i = i + 1 ' Advance the parser again.
End Select
i = i + 1 ' Advance the parser.
spanTag = "<span " & blink & "style='color:" & SetColorIntensity(fgColor, fgIntensity) & ";background-color:" & bgColor & ";'>"
oStream.WriteText spanTag
ElseIf (charCode >= 1 And charCode <= 31) Or (charCode >= 127 And charCode <= 254) Then
oStream.WriteText cp437html(charCode)
colPos = colPos + 1
Else
oStream.WriteText charAtI
colPos = colPos + 1
End If
Next
' Terminate the last span tag if needed.
If spanTag <> "" Then
oStream.WriteText "</span>"
End If
oStream.WriteText vbCrLf & "</pre>"
oStream.WriteText vbCrlf & "</body>" & vbCrlf & "</html>"
oStream.SaveToFile targetFile, 2
oStream.Close
End If
' *** END ***
' *** FUNCTIONS ***
'! Removes cursor movement sequences.
'! Result should be the final ANSI image displayed, rather than the
'! cursor-by-cursor movement or animation that generated it.
'!
'! @param ansiData The raw ANSI data from the file.
'! @return The rearranged ANSI data containing only "m" sequences.
Function FlattenAnsi(ansiData)
Const MAX_COLS = 80 ' Standard 80 column width
Const STARTING_ROWS = 5
Dim returnAnsi
Dim j
Dim charAtJ
Dim chrCode
Dim escSeq
Dim csiLastByte
Dim csiArgs
Dim row
Dim col
Dim rowSav
Dim colSav
Dim newEscSeq
Dim args
Dim cBuf
Dim rBuf
Dim adding
Dim a
ReDim screenBuffer(MAX_COLS, STARTING_ROWS)
For rBuf = 0 To UBound(screenBuffer, 2)
For cBuf = 0 To UBound(screenBuffer, 1)
screenBuffer(cBuf, rBuf) = " "
Next
Next
row = 0
col = 1
newEscSeq = ""
For j = 1 To Len(ansiData)
charAtJ = Mid(ansiData, j, 1)
chrCode = Asc(charAtJ)
If Mid(ansiData, j, 2) = CSI Then
escSeq = Mid(ansiData, j, InStrNextAlpha(j, ansiData, csiLastByte) - j)
csiArgs = Mid(escSeq, 3)
j = j + Len(escSeq) ' Advance the parser.
Select Case csiLastByte
Case "H", "f" ' Cursor position
IF InStr(csiArgs, ";") > 0 Then
args = Split(csiArgs, ";")
row = CInt(args(0)) ' n
col = 1
If Ubound(args) > 0 Then
col = CInt(args(1)) ' m
End If
ElseIf csiArgs <> "" Then
row = CInt(csiArgs) ' n
col = 1
Else
row = 1
col = 1
End If
Case "A" ' Cursor Up
newEscSeq = ""
If csiArgs = "" Then
csiArgs = 1
End If
row = row - CInt(csiArgs)
Case "B" ' Cursor Down
newEscSeq = ""
If csiArgs = "" Then
csiArgs = 1
End If
row = row + CInt(csiArgs)
Case "C" ' Cursor Forward
' Cancel the last SGR sequence before moving the "cursor",
' otherwise it will drag the sequence with it, leading
' to an incorrect background and/or foreground color.
if col <= MAX_COLS And row <= UBound(screenBuffer, 2) Then
screenBuffer(col, row) = CSI & "40m" & screenBuffer(col, row)
End If
newEscSeq = ""
If csiArgs = "" Then
csiArgs = 1
End If
col = col + CInt(csiArgs)
Case "D" ' Cursor Backward
If col <= MAX_COLS And row <= UBound(screenBuffer, 2) Then
screenBuffer(col, row) = CSI & "40m" & screenBuffer(col, row)
End If
newEscSeq = ""
If csiArgs = "" Then
csiArgs = 1
End If
col = col - CInt(csiArgs)
Case "s" ' Save cursor position
rowSav = CInt(row)
colSav = CInt(col)
Case "u" ' Restore cursor position
row = CInt(rowSav)
col = CInt(colSav)
'Probably won't bother implementing these:
' Case "2J" ' Erase display (?)
' Case "K" ' Erase line (?) -- Problematic..?
' Case "h" ' Set mode (screen width/height).
' Case "l" ' Reset mode
' Case "p" ' Set keyboard strings
Case Else ' Store the escape sequence to travel with the next characters
newEscSeq = newEscSeq & escSeq & csiLastByte
End Select
If row < 1 Then
row = 1
End If
If col < 1 Then
col = 1
End If
Else
If chrCode = 13 Then
ignoreLF = True
if row <= UBound(screenBuffer, 2) then
screenBuffer(col, row) = newEscSeq & screenBuffer(col, row)
end if
row = row + 1
col = 1
If j + 1 <= Len(ansiData) Then
If Asc(Mid(ansiData, j + 1, 1)) = 10 Then
j = j + 1 ' Advance the parser past the LF.
End If
End If
ElseIf chrCode = 10 Then
if ignoreLF = False then
if row <= UBound(screenBuffer, 2) then
screenBuffer(col, row) = newEscSeq & screenBuffer(col, row)
end if
row = row + 1
col = 1
end if
Else
' Append a line if it goes beyond the current max.
If row > UBound(screenBuffer, 2) Then
adding = row - UBound(screenBuffer, 2)
ReDim Preserve screenBuffer(MAX_COLS, row)
' Initialize the new row with all blanks/CR-LFs.
For a = 1 to adding Step 1
For cBuf = 1 To UBound(screenBuffer, 1)
screenBuffer(cBuf, row-(a-1)) = " "
Next
Next
End If
screenBuffer(col, row) = newEscSeq & charAtJ
' Clear the newEscSeq after using it, don't need it again.
If newEscSeq <> "" Then
newEscSeq = ""
End If
col = col + 1
If col > MAX_COLS Then
col = 1
row = row + 1
End If
End If
End If
Next
' Now form new ansiData out of the screen buffer contents.
For rBuf = 0 To UBound(screenBuffer, 2)
For cBuf = 1 To UBound(screenBuffer, 1)
' TODO - replace this with an ADO Stream object...
' No more concatenation.
returnAnsi = returnAnsi & screenBuffer(cBuf, rBuf)
Next
Next
FlattenAnsi = returnAnsi
End Function
'! Searches a string for the position of the next alpha character.
'!
'! @param startIndex The index of the string to start the search.
'! @param stringToSearch The string to search.
'! @param alphaFound Holds the alpha character that was found.
'! @return The index of the alpha character found.
Function InStrNextAlpha(startIndex, stringToSearch, ByRef alphaFound)
Dim j
Dim thisAsc
Dim returnIndex
Dim cha
alphaFound = ""
For j = startIndex To Len(stringToSearch)
cha = Mid(stringToSearch, j, 1)
thisAsc = Asc(cha)
If ((thisAsc >= 65 And thisAsc <= 90) Or (thisAsc >= 97 And thisAsc <= 122)) and alphaFound = "" Then
returnIndex = j
alphaFound = cha
Exit For
End If
Next
InStrNextAlpha = returnIndex
End Function
'! Determines whether to intensify a hex color value.
'! (I'm certain there's a more elegant way to intensify the color values
'! programmatically, but this way works fine.)
'!
'! @param color Any one of the 8 hex color value constants.
'! @param intensity If 1, return the intensified color, 0 if normal.
'! @return Hex value for either the normal or intensified color.
Function SetColorIntensity(color, intensity)
If intensity = 1 Then
Select Case color
Case BLACK
SetColorIntensity = DARKGRAY
Case RED
SetColorIntensity = LIGHTRED
Case GREEN
SetColorIntensity = LIGHTGREEN
Case BROWN
SetColorIntensity = YELLOW
Case BLUE
SetColorIntensity = LIGHTBLUE
Case MAGENTA
SetColorIntensity = LIGHTMAGENTA
Case CYAN
SetColorIntensity = LIGHTCYAN
Case GRAY
SetColorIntensity = WHITE
Case Else
SetColorIntensity = color
End Select
Else
SetColorIntensity = color
End If
End Function