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0011_Another AVATAR Routine.pas
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Pascal/Delphi Source File
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1993-05-28
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5KB
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209 lines
{
GREGORY P. SMITH
Here's a Unit I just pieced together from some old code I wrote a couple
years ago. It'll generate AVT/0+ and ANSI codes:
}
Unit TermCode; {$S-,D-,L-,R-,F-,O-}
{ Generate ANSI and AVT/0+ codes For color and cursor ctrl }
{ Public Domain -- by Gregory P. Smith } { untested }
Interface
Type
Str12 = String[12]; { Maximum size For most ANSI Strings }
Str3 = String[3];
grTermType = (TTY, ANSI, AVT0); { TTY, ANSI or Avatar/0+ }
Var
grTerm : grTermType;
grColor : Byte; { Last color set }
{ Non Specific Functions }
Function grRepChar(c:Char;n:Byte): String; { Repeat Chars }
Function grSetPos(x,y:Byte): Str12; { Set Cursor Position }
Function grCLS: Str12; { Clear Screen + reset Attr }
Function grDelEOL: Str12; { Delete to EOL }
Function grSetAttr(a:Byte): Str12; { Change writing color }
Function grSetColor(fg,bg:Byte): Str12; { Change color fg & bg }
{ AVT/0+ Specific Functions }
Function AVTRepPat(pat:String;n:Byte): String; { Repeat Pattern (AVT/0+) }
Function AVTScrollUp(n,x1,y1,x2,y2:Byte): Str12;
Function AVTScrollDown(n,x1,y1,x2,y2:Byte): Str12;
Function AVTClearArea(a,l,c:Byte): Str12;
Function AVTInitArea(ch:Char;a,l,c:Byte): Str12;
Implementation
Const
hdr = #27'['; { ansi header }
{ Misc support Functions }
Function bts(x:Byte): str3; { Byte to String }
Var
z: str3;
begin
Str(x,z);
bts := z;
end;
Function Repl(n:Byte; c:Char): String;
Var
z : String;
begin
fillChar(z[1],n,c);
z[0] := chr(n);
repl := z;
end;
{ Cursor Control Functions }
Function grRepChar(c:Char;n:Byte): String;
begin
if grTerm = AVT0 then
grRepChar := ^Y+c+chr(n)
else
grRepChar := repl(n,c);
end; { repcahr }
Function grSetPos(x,y:Byte): Str12;
begin
Case grTerm of
ANSI : if (x = 1) and (y > 1) then
grSetPos := hdr+bts(y)+'H' { x defualts to 1 }
else
grSetPos := hdr+bts(y)+';'+bts(x)+'H';
AVT0 : grSetPos := ^V+^H+chr(y)+chr(x);
TTY : grSetPos := '';
end; { Case }
end;
Function grCLS: Str12;
begin
Case grTerm of
ANSI : grCLS := hdr+'2J';
TTY,
AVT0 : grCLS := ^L;
end;
if grTerm = AVT0 then GrColor := 3; { reset the color }
end; { cls }
Function grDelEOL: Str12; { clear rest of line }
begin
Case grTerm of
ANSI : grDelEOL := hdr+'K';
AVT0 : grDelEOL := ^V^G;
TTY : grDelEOL := '';
end;
end;
{ Color Functions }
Function grSetAttr(a:Byte): Str12;
Const
ANS_Colors : Array[0..7] of Char = ('0','4','2','6','1','5','3','7');
Var
tmp : Str12;
begin
tmp := '';
Case grTerm of
ANSI :
begin
tmp := hdr;
if (a and $08)=8 then tmp := tmp+'1' else tmp := tmp+'0'; { bright }
if (a and $80)=$80 then tmp := tmp+';5'; { blink }
tmp := tmp+';3'+ANS_Colors[a and $07]; { foreground }
tmp := tmp+';4'+ANS_Colors[(a shr 4) and $07]; { background }
grSetAttr := tmp+'m'; { complete ANSI code }
end;
AVT0 :
begin
tmp := ^V+^A+chr(a and $7f);
if a > 127 then tmp := tmp+^V+^B; { Blink }
grSetAttr := tmp;
end;
TTY : grSetAttr := '';
end; { Case }
GrColor := a; { Current Attribute }
end; { setattr }
Function grSetColor(fg,bg:Byte): Str12;
begin
grSetColor := grSetAttr((bg shl 4) or (fg and $0f));
end; { SetColor }
{ AVATAR Specific Functions: }
Function AVTRepPat(pat:String;n:Byte): String; { Repeat Pattern (AVT/0+) }
begin
AVTRepPat := ^V+^Y+pat[0]+pat+chr(n); { Repeat pat n times }
end;
Function AVTScrollUp(n,x1,y1,x2,y2:Byte): Str12;
begin
AVTScrollUp := ^V+^J+chr(n)+chr(y1)+chr(x1)+chr(y2)+chr(x2);
end; { AVTScrollUp }
Function AVTScrollDown(n,x1,y1,x2,y2:Byte): Str12;
begin
AVTScrollDown := ^V+^K+chr(n)+chr(y1)+chr(x1)+chr(y2)+chr(x2);
end; { AVTScrollDown }
Function AVTClearArea(a,l,c:Byte): Str12;
Var
b:Byte;
s:Str12;
begin { Clear lines,columns from cursor pos With Attr }
b := a and $7f;
s := ^V+^L+chr(b)+chr(l)+chr(c);
if a > 127 then
Insert(^V+^B,s,1); { blink on }
AVTClearArea := s;
GrColor := a;
end; { AVTClearArea }
Function AVTInitArea(ch:Char;a,l,c:Byte): Str12;
Var
b:Byte;
s:Str12;
begin
b := a and $7f;
s := ^V+^M+chr(b)+ch+chr(l)+chr(c);
if a > 127 then
Insert(^V+^B,s,1);
AvtInitArea := s;
GrColor := a;
end; { AVTInitArea }
{ Initalization code }
begin
GrTerm := AVT0; { Default to Avatar }
GrColor := 3; { Cyan is the AVT/0+ defualt }
end.
{
set GrTerm to whatever terminal codes you want to create; then you can use the
common routines to generate ANSI or Avatar codes. Here's a Print Procedure
that you were mentioning:
}
Procedure Print(Var msg:String);
Var
idx : Byte
begin
if length(msg) > 0 then
For idx := 1 to length(msg) do begin
Parse_AVT1(msg[idx]);
SendOutComPortThingy(msg[idx]);
end; { For }
end;
{
You could modify this so that it pays attention to the TextAttr Variable of the
Crt Unit if you wish so that it compares TextAttr to GrColor and adds a
SetAttr(TextAttr) command in before it sends msg.
}