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fpc/rtl/unix/crt.pp

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{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Michael Van Canneyt and Peter Vreman,
members of the Free Pascal development team.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit Crt;
Interface
{$i crth.inc}
Const
{ Controlling consts }
Flushing = false; {if true then don't buffer output}
ConsoleMaxX = 1024;
ConsoleMaxY = 1024;
ScreenHeight : longint = 25;
ScreenWidth : longint = 80;
Type
TCharAttr=packed record
ch : char;
attr : byte;
end;
TConsoleBuf=Array[0..ConsoleMaxX*ConsoleMaxY-1] of TCharAttr;
PConsoleBuf=^TConsoleBuf;
var
ConsoleBuf : PConsoleBuf;
Implementation
uses BaseUnix ,unix, termio;
{
The definitions of TextRec and FileRec are in separate files.
}
{$i textrec.inc}
Const
OldTextAttr : byte = $07;
Var
CurrX,CurrY : Byte;
OutputRedir, InputRedir : boolean; { is the output/input being redirected (not a TTY) }
WinMinX,
WinMinY,
WinMaxX,
WinMaxY : Longint;
{*****************************************************************************
Some Handy Functions Not in the System.PP
*****************************************************************************}
Function Str(l:longint):string;
{
Return a String of the longint
}
var
hstr : string[32];
begin
System.Str(l,hstr);
Str:=hstr;
end;
Function Max(l1,l2:longint):longint;
{
Return the maximum of l1 and l2
}
begin
if l1>l2 then
Max:=l1
else
Max:=l2;
end;
Function Min(l1,l2:longint):longint;
{
Return the minimum of l1 and l2
}
begin
if l1<l2 then
Min:=l1
else
Min:=l2;
end;
{*****************************************************************************
Optimal AnsiString Conversion Routines
*****************************************************************************}
Function XY2Ansi(x,y,ox,oy:longint):String;
{
Returns a string with the escape sequences to go to X,Y on the screen
}
Begin
if y=oy then
begin
if x=ox then
begin
XY2Ansi:='';
exit;
end;
if x=1 then
begin
XY2Ansi:=#13;
exit;
end;
if x>ox then
begin
XY2Ansi:=#27'['+Str(x-ox)+'C';
exit;
end
else
begin
XY2Ansi:=#27'['+Str(ox-x)+'D';
exit;
end;
end;
if x=ox then
begin
if y>oy then
begin
XY2Ansi:=#27'['+Str(y-oy)+'B';
exit;
end
else
begin
XY2Ansi:=#27'['+Str(oy-y)+'A';
exit;
end;
end;
if (x=1) and (oy+1=y) then
XY2Ansi:=#13#10
else
XY2Ansi:=#27'['+Str(y)+';'+Str(x)+'H';
End;
const
AnsiTbl : string[8]='04261537';
Function Attr2Ansi(Attr,OAttr:longint):string;
{
Convert Attr to an Ansi String, the Optimal code is calculate
with use of the old OAttr
}
var
hstr : string[16];
OFg,OBg,Fg,Bg : longint;
procedure AddSep(ch:char);
begin
if length(hstr)>0 then
hstr:=hstr+';';
hstr:=hstr+ch;
end;
begin
if Attr=OAttr then
begin
Attr2Ansi:='';
exit;
end;
Hstr:='';
Fg:=Attr and $f;
Bg:=Attr shr 4;
OFg:=OAttr and $f;
OBg:=OAttr shr 4;
if (OFg<>7) or (Fg=7) or ((OFg>7) and (Fg<8)) or ((OBg>7) and (Bg<8)) then
begin
hstr:='0';
OFg:=7;
OBg:=0;
end;
if (Fg>7) and (OFg<8) then
begin
AddSep('1');
OFg:=OFg or 8;
end;
if (Bg and 8)<>(OBg and 8) then
begin
AddSep('5');
OBg:=OBg or 8;
end;
if (Fg<>OFg) then
begin
AddSep('3');
hstr:=hstr+AnsiTbl[(Fg and 7)+1];
end;
if (Bg<>OBg) then
begin
AddSep('4');
hstr:=hstr+AnsiTbl[(Bg and 7)+1];
end;
if hstr='0' then
hstr:='';
Attr2Ansi:=#27'['+hstr+'m';
end;
Function Ansi2Attr(Const HStr:String;oattr:longint):longint;
{
Convert an Escape sequence to an attribute value, uses Oattr as the last
color written
}
var
i,j : longint;
begin
i:=2;
if (Length(HStr)<3) or (Hstr[1]<>#27) or (Hstr[2]<>'[') then
i:=255;
while (i<length(Hstr)) do
begin
inc(i);
case Hstr[i] of
'0' : OAttr:=7;
'1' : OAttr:=OAttr or $8;
'5' : OAttr:=OAttr or $80;
'3' : begin
inc(i);
j:=pos(Hstr[i],AnsiTbl);
if j>0 then
OAttr:=(OAttr and $f8) or (j-1);
end;
'4' : begin
inc(i);
j:=pos(Hstr[i],AnsiTbl);
if j>0 then
OAttr:=(OAttr and $8f) or ((j-1) shl 4);
end;
'm' : i:=length(HStr);
end;
end;
Ansi2Attr:=OAttr;
end;
{*****************************************************************************
Buffered StdIn/StdOut IO
*****************************************************************************}
const
ttyIn=0; {Handles for stdin/stdout}
ttyOut=1;
ttyFlush:boolean=true;
{Buffered Input/Output}
InSize=256;
OutSize=1024;
var
InBuf : array[0..InSize-1] of char;
InCnt,
InHead,
InTail : longint;
OutBuf : array[0..OutSize-1] of char;
OutCnt : longint;
{Flush Output Buffer}
procedure ttyFlushOutput;
begin
if OutCnt>0 then
begin
fpWrite(ttyOut,OutBuf,OutCnt);
OutCnt:=0;
end;
end;
Function ttySetFlush(b:boolean):boolean;
begin
ttySetFlush:=ttyFlush;
ttyFlush:=b;
if ttyFlush then
ttyFlushOutput;
end;
{Send Char to Remote}
Procedure ttySendChar(c:char);
Begin
if OutCnt<OutSize then
begin
OutBuf[OutCnt]:=c;
inc(OutCnt);
end;
{Full ?}
if (OutCnt>=OutSize) then
ttyFlushOutput;
End;
{Send String to Remote}
procedure ttySendStr(const hstr:string);
var
i : longint;
begin
for i:=1to length(hstr) do
ttySendChar(hstr[i]);
if ttyFlush then
ttyFlushOutput;
end;
{Get Char from Remote}
function ttyRecvChar:char;
var
Readed,i : longint;
begin
{Buffer Empty? Yes, Input from StdIn}
if (InHead=InTail) then
begin
{Calc Amount of Chars to Read}
i:=InSize-InHead;
if InTail>InHead then
i:=InTail-InHead;
{Read}
Readed:=fpread(TTYIn,InBuf[InHead],i);
{Increase Counters}
inc(InCnt,Readed);
inc(InHead,Readed);
{Wrap if End has Reached}
if InHead>=InSize then
InHead:=0;
end;
{Check Buffer}
if (InCnt=0) then
ttyRecvChar:=#0
else
begin
ttyRecvChar:=InBuf[InTail];
dec(InCnt);
inc(InTail);
if InTail>=InSize then
InTail:=0;
end;
end;
{*****************************************************************************
Screen Routines not Window Depended
*****************************************************************************}
procedure ttyGotoXY(x,y:longint);
{
Goto XY on the Screen, if a value is 0 the goto the current
postion of that value and always recalc the ansicode for it
}
begin
if x=0 then
begin
x:=CurrX;
CurrX:=$ff;
end;
if y=0 then
begin
y:=CurrY;
CurrY:=$ff;
end;
if OutputRedir then
begin
if longint(y)-longint(CurrY)=1 then
ttySendStr(#10);
end
else
ttySendStr(XY2Ansi(x,y,CurrX,CurrY));
CurrX:=x;
CurrY:=y;
end;
procedure ttyColor(a:longint);
{
Set Attribute to A, only output if not the last attribute is set
}
begin
if a<>OldTextAttr then
begin
if not OutputRedir then
ttySendStr(Attr2Ansi(a,OldTextAttr));
TextAttr:=a;
OldTextAttr:=a;
end;
end;
procedure ttyWrite(const s:string);
{
Write a string to the output, memory copy and Current X&Y are also updated
}
var
idx,i : longint;
begin
ttySendStr(s);
{Update MemCopy}
idx:=(CurrY-1)*ScreenWidth-1;
for i:=1to length(s) do
if s[i]=#8 then
begin
if CurrX>1 then
dec(CurrX);
end
else
begin
ConsoleBuf^[idx+CurrX].ch:=s[i];
ConsoleBuf^[idx+CurrX].attr:=TextAttr;
inc(CurrX);
if CurrX>ScreenWidth then
CurrX:=ScreenWidth;
end;
end;
Function FullWin:boolean;
{
Full Screen 80x25? Window(1,1,80,25) is used, allows faster routines
}
begin
FullWin:=(WinMinX=1) and (WinMinY=1) and
(WinMaxX=ScreenWidth) and (WinMaxY=ScreenHeight);
end;
procedure LineWrite(const temp:String);
{
Write a Line to the screen, doesn't write on 80,25 under Dos
the Current CurrX is set to WinMax. NO MEMORY UPDATE!
}
begin
CurrX:=WinMaxX+1;
if (CurrX>=ScreenWidth) then
CurrX:=WinMaxX;
ttySendStr(Temp);
end;
procedure DoEmptyLine(y,xl,xh:longint);
{
Write an Empty line at Row Y from Col Xl to XH, Memory is also updated
}
var
len : longint;
begin
ttyGotoXY(xl,y);
len:=xh-xl+1;
LineWrite(Space(len));
FillWord(ConsoleBuf^[(y-1)*ScreenWidth+xl-1],len,(TextAttr shl 8)+ord(' '));
end;
procedure DoScrollLine(y1,y2,xl,xh:longint);
{
Move Line y1 to y2, use only columns Xl-Xh, Memory is updated also
}
var
Temp : string;
idx,
OldAttr,
x,attr : longint;
begin
ttyGotoXY(xl,y2);
{ precalc ConsoleBuf[] y-offset }
idx:=(y1-1)*ScreenWidth-1;
{ update screen }
OldAttr:=$ff;
Temp:='';
For x:=xl To xh Do
Begin
attr:=ConsoleBuf^[idx+x].attr;
if (attr<>OldAttr) and (not OutputRedir) then
begin
temp:=temp+Attr2Ansi(Attr,OldAttr);
OldAttr:=Attr;
end;
Temp:=Temp+ConsoleBuf^[idx+x].ch;
if (x=xh) or (length(Temp)>240) then
begin
LineWrite(Temp);
Temp:='';
end;
End;
{Update memory copy}
Move(ConsoleBuf^[(y1-1)*ScreenWidth+xl-1],ConsoleBuf^[(y2-1)*ScreenWidth+xl-1],(xh-xl+1)*2);
end;
Procedure TextColor(Color: Byte);
{
Switch foregroundcolor
}
var AddBlink : byte;
Begin
If (Color>15) Then
AddBlink:=Blink
else
AddBlink:=0;
ttyColor((Color and $f) or (TextAttr and $70) or AddBlink);
End;
Procedure TextBackground(Color: Byte);
{
Switch backgroundcolor
}
Begin
TextAttr:=((Color shl 4) and ($f0 and not Blink)) or (TextAttr and ($0f OR Blink));
ttyColor(TextAttr);
End;
Procedure HighVideo;
{
Set highlighted output.
}
Begin
TextColor(TextAttr Or $08);
End;
Procedure LowVideo;
{
Set normal output
}
Begin
TextColor(TextAttr And $77);
End;
Procedure NormVideo;
{
Set normal back and foregroundcolors.
}
Begin
TextColor(7);
TextBackGround(0);
End;
Procedure GotoXy(X: Byte; Y: Byte);
{
Go to coordinates X,Y in the current window.
}
Begin
If (X>0) and (X<=WinMaxX- WinMinX+1) and
(Y>0) and (Y<=WinMaxY-WinMinY+1) Then
Begin
Inc(X,WinMinX-1);
Inc(Y,WinMinY-1);
ttyGotoXY(x,y);
End;
End;
Procedure Window(X1, Y1, X2, Y2: Byte);
{
Set screen window to the specified coordinates.
}
Begin
if (X1>X2) or (X2>ScreenWidth) or
(Y1>Y2) or (Y2>ScreenHeight) then
exit;
WinMinX:=X1;
WinMaxX:=X2;
WinMinY:=Y1;
WinMaxY:=Y2;
WindMin:=((Y1-1) Shl 8)+(X1-1);
WindMax:=((Y2-1) Shl 8)+(X2-1);
GoToXY(1,1);
End;
Procedure ClrScr;
{
Clear the current window, and set the cursor on x1,y1
}
Var
CY,i : Longint;
oldflush : boolean;
Begin
{ See if color has changed }
if OldTextAttr<>TextAttr then
begin
i:=TextAttr;
TextAttr:=OldTextAttr;
ttyColor(i);
end;
oldflush:=ttySetFlush(Flushing);
if FullWin then
begin
if not OutputRedir then
ttySendStr(#27'[H'#27'[2J');
CurrX:=1;
CurrY:=1;
FillWord(ConsoleBuf^,ScreenWidth*ScreenHeight,(TextAttr shl 8)+ord(' '));
end
else
begin
For Cy:=WinMinY To WinMaxY Do
DoEmptyLine(Cy,WinMinX,WinMaxX);
GoToXY(1,1);
end;
ttySetFlush(oldflush);
End;
Procedure ClrEol;
{
Clear from current position to end of line.
}
var
len,i : longint;
IsLastLine : boolean;
Begin
{ See if color has changed }
if OldTextAttr<>TextAttr then
begin
i:=TextAttr;
TextAttr:=OldTextAttr;
ttyColor(i);
end;
if FullWin or (WinMaxX = ScreenWidth) then
begin
if not OutputRedir then
ttySendStr(#27'[K');
end
else
begin
{ Tweak winmaxx and winmaxy so no scrolling happends }
len:=WinMaxX-CurrX+1;
IsLastLine:=false;
if CurrY=WinMaxY then
begin
inc(WinMaxX,3);
inc(WinMaxY,2);
IsLastLine:=true;
end;
ttySendStr(Space(len));
if IsLastLine then
begin
dec(WinMaxX,3);
dec(WinMaxY,2);
end;
ttyGotoXY(0,0);
end;
End;
Function WhereX: Byte;
{
Return current X-position of cursor.
}
Begin
WhereX:=CurrX-WinMinX+1;
End;
Function WhereY: Byte;
{
Return current Y-position of cursor.
}
Begin
WhereY:=CurrY-WinMinY+1;
End;
Procedure ScrollScrnRegionUp(xl,yl,xh,yh, count: longint);
{
Scroll the indicated region count lines up. The empty lines are filled
with blanks in the current color. The screen position is restored
afterwards.
}
Var
y,oldx,oldy : byte;
oldflush : boolean;
Begin
oldflush:=ttySetFlush(Flushing);
oldx:=CurrX;
oldy:=CurrY;
{Scroll}
For y:=yl to yh-count do
DoScrollLine(y+count,y,xl,xh);
{Restore TextAttr}
ttySendStr(Attr2Ansi(TextAttr,$ff));
{Fill the rest with empty lines}
for y:=yh-count+1 to yh do
DoEmptyLine(y,xl,xh);
{Restore current position}
ttyGotoXY(OldX,OldY);
ttySetFlush(oldflush);
End;
Procedure ScrollScrnRegionDown(xl,yl,xh,yh, count: longint);
{
Scroll the indicated region count lines down. The empty lines are filled
with blanks in the current color. The screen position is restored
afterwards.
}
Var
y,oldx,oldy : byte;
oldflush : boolean;
Begin
oldflush:=ttySetFlush(Flushing);
oldx:=CurrX;
oldy:=CurrY;
{Scroll}
for y:=yh downto yl+count do
DoScrollLine(y-count,y,xl,xh);
{Restore TextAttr}
ttySendStr(Attr2Ansi(TextAttr,$ff));
{Fill the rest with empty lines}
for y:=yl to yl+count-1 do
DoEmptyLine(y,xl,xh);
{Restore current position}
ttyGotoXY(OldX,OldY);
ttySetFlush(oldflush);
End;
{*************************************************************************
KeyBoard
*************************************************************************}
Const
KeyBufferSize = 20;
var
KeyBuffer : Array[0..KeyBufferSize-1] of Char;
KeyPut,
KeySend : longint;
Procedure PushKey(Ch:char);
Var
Tmp : Longint;
Begin
Tmp:=KeyPut;
Inc(KeyPut);
If KeyPut>=KeyBufferSize Then
KeyPut:=0;
If KeyPut<>KeySend Then
KeyBuffer[Tmp]:=Ch
Else
KeyPut:=Tmp;
End;
Function PopKey:char;
Begin
If KeyPut<>KeySend Then
Begin
PopKey:=KeyBuffer[KeySend];
Inc(KeySend);
If KeySend>=KeyBufferSize Then
KeySend:=0;
End
Else
PopKey:=#0;
End;
Procedure PushExt(b:byte);
begin
PushKey(#0);
PushKey(chr(b));
end;
const
AltKeyStr : string[38]='qwertyuiopasdfghjklzxcvbnm1234567890-=';
AltCodeStr : string[38]=#016#017#018#019#020#021#022#023#024#025#030#031#032#033#034#035#036#037#038+
#044#045#046#047#048#049#050#120#121#122#123#124#125#126#127#128#129#130#131;
Function FAltKey(ch:char):byte;
var
Idx : longint;
Begin
Idx:=Pos(ch,AltKeyStr);
if Idx>0 then
FAltKey:=byte(AltCodeStr[Idx])
else
FAltKey:=0;
End;
{ This one doesn't care about keypresses already processed by readkey }
{ and waiting in the KeyBuffer, only about waiting keypresses at the }
{ TTYLevel (including ones that are waiting in the TTYRecvChar buffer) }
function sysKeyPressed: boolean;
var
fdsin : tfdSet;
begin
if (InCnt>0) then
sysKeyPressed:=true
else
begin
fpFD_ZERO(fdsin);
fpFD_SET(TTYin,fdsin);
sysKeypressed:=(fpSelect(TTYIn+1,@fdsin,nil,nil,0)>0);
end;
end;
Function KeyPressed:Boolean;
Begin
Keypressed := (KeySend<>KeyPut) or sysKeyPressed;
End;
Function ReadKey:char;
Var
ch : char;
OldState,
State : longint;
FDS : TFDSet;
Begin
{Check Buffer first}
if KeySend<>KeyPut then
begin
ReadKey:=PopKey;
exit;
end;
{Wait for Key}
{ Only if none are waiting! (JM) }
if not sysKeyPressed then
begin
FpFD_ZERO (FDS);
fpFD_SET (0,FDS);
fpSelect (1,@FDS,nil,nil,nil);
end;
ch:=ttyRecvChar;
{Esc Found ?}
CASE ch OF
#27: begin
State:=1;
Delay(10);
{ This has to be sysKeyPressed and not "keyPressed", since after }
{ one iteration keyPressed will always be true because of the }
{ pushKey commands (JM) }
while (State<>0) and (sysKeyPressed) do
begin
ch:=ttyRecvChar;
OldState:=State;
State:=0;
case OldState of
1 : begin {Esc}
case ch of
'a'..'z',
'0'..'9',
'-','=' : PushExt(FAltKey(ch));
#10 : PushKey(#10);
'[' : State:=2;
{$IFDEF Unix}
'O': State:=7;
{$ENDIF}
else
begin
PushKey(ch);
PushKey(#27);
end;
end;
end;
2 : begin {Esc[}
case ch of
'[' : State:=3;
'A' : PushExt(72);
'B' : PushExt(80);
'C' : PushExt(77);
'D' : PushExt(75);
{$IFDEF FREEBSD}
{'E' - Center key, not handled in DOS TP7}
'F' : PushExt(79); {End}
'G': PushExt(81); {PageDown}
{$ELSE}
'G' : PushKey('5'); {Center key, Linux}
{$ENDIF}
'H' : PushExt(71);
{$IFDEF FREEBSD}
'I' : PushExt(73); {PageUp}
{$ENDIF}
'K' : PushExt(79);
{$IFDEF FREEBSD}
'L' : PushExt(82); {Insert - Deekoo}
'M' : PushExt(59); {F1-F10 - Deekoo}
'N' : PushExt(60); {F2}
'O' : PushExt(61); {F3}
'P' : PushExt(62); {F4}
'Q' : PushExt(63); {F5}
'R' : PushExt(64); {F6}
'S' : PushExt(65); {F7}
'T' : PushExt(66); {F8}
'U' : PushExt(67); {F9}
'V' : PushExt(68); {F10}
{Not sure if TP/BP handles F11 and F12 like this normally;
In pcemu, a TP7 executable handles 'em this way, though.}
'W' : PushExt(133); {F11}
'X' : PushExt(134); {F12}
'Y' : PushExt(84); {Shift-F1}
'Z' : PushExt(85); {Shift-F2}
'a' : PushExt(86); {Shift-F3}
'b' : PushExt(87); {Shift-F4}
'c' : PushExt(88); {Shift-F5}
'd' : PushExt(89); {Shift-F6}
'e' : PushExt(90); {Shift-F7}
'f' : PushExt(91); {Shift-F8}
'g' : PushExt(92); {Shift-F9}
'h' : PushExt(93); {Shift-F10}
'i' : PushExt(135); {Shift-F11}
'j' : PushExt(136); {Shift-F12}
'k' : PushExt(94); {Ctrl-F1}
'l' : PushExt(95);
'm' : PushExt(96);
'n' : PushExt(97);
'o' : PushExt(98);
'p' : PushExt(99);
'q' : PushExt(100);
'r' : PushExt(101);
's' : PushExt(102);
't' : PushExt(103); {Ctrl-F10}
'u' : PushExt(137); {Ctrl-F11}
'v' : PushExt(138); {Ctrl-F12}
{$ENDIF}
'1' : State:=4;
'2' : State:=5;
'3' : State:=6;
'4' : PushExt(79);
'5' : PushExt(73);
'6' : PushExt(81);
else
begin
PushKey(ch);
PushKey('[');
PushKey(#27);
end;
end;
if ch in ['4'..'6'] then
State:=255;
end;
3 : begin {Esc[[}
case ch of
'A' : PushExt(59);
'B' : PushExt(60);
'C' : PushExt(61);
'D' : PushExt(62);
'E' : PushExt(63);
end;
end;
4 : begin {Esc[1}
case ch of
'~' : PushExt(71);
'7' : PushExt(64);
'8' : PushExt(65);
'9' : PushExt(66);
end;
if (Ch<>'~') then
State:=255;
end;
5 : begin {Esc[2}
case ch of
'~' : PushExt(82);
'0' : pushExt(67);
'1' : PushExt(68);
'3' : PushExt(133); {F11}
{Esc[23~ is also shift-F1,shift-F11}
'4' : PushExt(134); {F12}
{Esc[24~ is also shift-F2,shift-F12}
'5' : PushExt(86); {Shift-F3}
'6' : PushExt(87); {Shift-F4}
'8' : PushExt(88); {Shift-F5}
'9' : PushExt(89); {Shift-F6}
end;
if (Ch<>'~') then
State:=255;
end;
6 : begin {Esc[3}
case ch of
'~' : PushExt(83); {Del}
'1' : PushExt(90); {Shift-F7}
'2' : PushExt(91); {Shift-F8}
'3' : PushExt(92); {Shift-F9}
'4' : PushExt(93); {Shift-F10}
end;
if (Ch<>'~') then
State:=255;
end;
{$ifdef Unix}
7 : begin {Esc[O}
case ch of
'A' : PushExt(72);
'B' : PushExt(80);
'C' : PushExt(77);
'D' : PushExt(75);
end;
end;
{$endif}
255 : ;
end;
if State<>0 then
Delay(10);
end;
if State=1 then
PushKey(ch);
end;
#127: PushKey(#8);
else PushKey(ch);
End;
ReadKey:=PopKey;
End;
Procedure Delay(MS: Word);
{
Wait for DTime milliseconds.
}
Begin
fpSelect(0,nil,nil,nil,MS);
End;
{****************************************************************************
Write(ln)/Read(ln) support
****************************************************************************}
procedure DoLn;
begin
if CurrY=WinMaxY then
begin
if FullWin then
begin
ttySendStr(#10#13);
CurrX:=WinMinX;
CurrY:=WinMaxY;
end
else
begin
ScrollScrnRegionUp(WinMinX,WinMinY,WinMaxX,WinMaxY,1);
ttyGotoXY(WinMinX,WinMaxY);
end;
end
else
ttyGotoXY(WinMinX,CurrY+1);
end;
var
Lastansi : boolean;
AnsiCode : string;
Procedure DoWrite(const s:String);
{
Write string to screen, parse most common AnsiCodes
}
var
found,
OldFlush : boolean;
x,y,
i,j,
SendBytes : longint;
function AnsiPara(var hstr:string):byte;
var
k,j : longint;
code : word;
begin
j:=pos(';',hstr);
if j=0 then
j:=length(hstr);
val(copy(hstr,3,j-3),k,code);
Delete(hstr,3,j-2);
if k=0 then
k:=1;
AnsiPara:=k;
end;
procedure SendText;
var
LeftX : longint;
begin
while (SendBytes>0) do
begin
LeftX:=WinMaxX-CurrX+1;
if (SendBytes>LeftX) then
begin
ttyWrite(Copy(s,i-SendBytes,LeftX));
dec(SendBytes,LeftX);
DoLn;
end
else
begin
ttyWrite(Copy(s,i-SendBytes,SendBytes));
SendBytes:=0;
end;
end;
end;
begin
oldflush:=ttySetFlush(Flushing);
{ Support textattr:= changing }
if OldTextAttr<>TextAttr then
begin
i:=TextAttr;
TextAttr:=OldTextAttr;
ttyColor(i);
end;
{ write the stuff }
SendBytes:=0;
i:=1;
while (i<=length(s)) do
begin
if (s[i]=#27) or (LastAnsi) then
begin
SendText;
LastAnsi:=false;
j:=i;
found:=false;
while (j<=length(s)) and (not found) do
begin
found:=not (s[j] in [#27,'[','0'..'9',';','?']);
inc(j);
end;
Ansicode:=AnsiCode+Copy(s,i,j-i);
if found then
begin
case AnsiCode[length(AnsiCode)] of
'm' : ttyColor(Ansi2Attr(AnsiCode,TextAttr));
'H' : begin {No other way :( Coz First Para=Y}
y:=AnsiPara(AnsiCode);
x:=AnsiPara(AnsiCode);
GotoXY(x,y);
end;
'J' : if AnsiPara(AnsiCode)=2 then
ClrScr;
'K' : ClrEol;
'A' : GotoXY(CurrX,Max(CurrY-AnsiPara(AnsiCode),WinMinY));
'B' : GotoXY(CurrX,Min(CurrY+AnsiPara(AnsiCode),WinMaxY));
'C' : GotoXY(Min(CurrX+AnsiPara(AnsiCode),WinMaxX),CurrY);
'D' : GotoXY(Max(CurrX-AnsiPara(AnsiCode),WinMinX),CurrY);
'h' : ; {Stupid Thedraw [?7h Code}
else
found:=false;
end;
end
else
begin
LastAnsi:=true;
found:=true;
end;
{Clear AnsiCode?}
if not LastAnsi then
AnsiCode:='';
{Increase Idx or SendBytes}
if found then
i:=j-1
else
inc(SendBytes);
end
else
begin
LastAnsi:=false;
case s[i] of
#13 : begin {CR}
SendText;
ttyGotoXY(WinMinX,CurrY);
end;
#10 : begin {NL}
SendText;
DoLn;
end;
#9 : begin {Tab}
SendText;
ttyWrite(Space(9-((CurrX-1) and $08)));
end;
#8 : begin {BackSpace}
SendText;
ttyWrite(#8);
end;
else
inc(SendBytes);
end;
end;
inc(i);
end;
if SendBytes>0 then
SendText;
ttySetFlush(oldFLush);
end;
Function CrtWrite(Var F: TextRec): Integer;
{
Top level write function for CRT
}
Var
Temp : String;
idx,i : Longint;
oldflush : boolean;
Begin
oldflush:=ttySetFlush(Flushing);
idx:=0;
while (F.BufPos>0) do
begin
i:=F.BufPos;
if i>255 then
i:=255;
Move(F.BufPTR^[idx],Temp[1],i);
SetLength(Temp,i);
DoWrite(Temp);
dec(F.BufPos,i);
inc(idx,i);
end;
ttySetFlush(oldFLush);
CrtWrite:=0;
End;
Function CrtRead(Var F: TextRec): Integer;
{
Read from CRT associated file.
}
var
c : char;
i : longint;
Begin
if isATTY(F.Handle)<>-1 then
begin
F.BufPos := 0;
i := 0;
repeat
c := readkey;
case c of
{ ignore special keys }
#0:
c:= readkey;
{ Backspace }
#8:
if i > 0 then
begin
if not(OutputRedir or InputRedir) then
write(#8#32#8);
dec(i);
end;
{ Unhandled extended key }
#27:;
{ CR }
#13:
begin
F.BufPtr^[i] := #10;
if not(OutputRedir or InputRedir) then
write(#10);
inc(i);
end;
else
begin
if not(OutputRedir or InputRedir) then
write(c);
F.BufPtr^[i] := c;
inc(i);
end;
end;
until (c in [#10,#13]) or (i >= F.BufSize);
F.BufEnd := i;
CrtRead := 0;
exit;
end;
F.BufEnd:=fpRead(F.Handle, F.BufPtr^, F.BufSize);
{ fix #13 only's -> #10 to overcome terminal setting }
for i:=1to F.BufEnd do
begin
if (F.BufPtr^[i-1]=#13) and (F.BufPtr^[i]<>#10) then
F.BufPtr^[i-1]:=#10;
end;
F.BufPos:=F.BufEnd;
if not(OutputRedir or InputRedir) then
CrtWrite(F)
else F.BufPos := 0;
CrtRead:=0;
End;
Function CrtReturn(Var F:TextRec):Integer;
Begin
CrtReturn:=0;
end;
Function CrtClose(Var F: TextRec): Integer;
{
Close CRT associated file.
}
Begin
F.Mode:=fmClosed;
CrtClose:=0;
End;
Function CrtOpen(Var F: TextRec): Integer;
{
Open CRT associated file.
}
Begin
If F.Mode=fmOutput Then
begin
TextRec(F).InOutFunc:=@CrtWrite;
TextRec(F).FlushFunc:=@CrtWrite;
end
Else
begin
F.Mode:=fmInput;
TextRec(F).InOutFunc:=@CrtRead;
TextRec(F).FlushFunc:=@CrtReturn;
end;
TextRec(F).CloseFunc:=@CrtClose;
CrtOpen:=0;
End;
procedure AssignCrt(var F: Text);
{
Assign a file to the console. All output on file goes to console instead.
}
begin
Assign(F,'');
TextRec(F).OpenFunc:=@CrtOpen;
end;
{******************************************************************************
High Level Functions
******************************************************************************}
Procedure DelLine;
{
Delete current line. Scroll subsequent lines up
}
Begin
ScrollScrnRegionUp(WinMinX, CurrY, WinMaxX, WinMaxY, 1);
End;
Procedure InsLine;
{
Insert line at current cursor position. Scroll subsequent lines down.
}
Begin
ScrollScrnRegionDown(WinMinX, CurrY, WinMaxX, WinMaxY, 1);
End;
const
KIOCSOUND = $4B2F; // start sound generation (0 for off)
Procedure Sound(Hz: Word);
begin
if not OutputRedir then
fpIoctl(TextRec(Output).Handle, KIOCSOUND, Pointer(1193180 div Hz));
end;
Procedure NoSound;
begin
if not OutputRedir then
fpIoctl(TextRec(Output).Handle, KIOCSOUND, nil);
end;
Procedure TextMode(Mode: Integer);
{
Only Clears Screen under linux}
begin
ClrScr;
end;
{******************************************************************************
Extra
******************************************************************************}
procedure CursorBig;
begin
ttySendStr(#27'[?17;0;64c');
end;
procedure CursorOn;
begin
ttySendStr(#27'[?2c');
end;
procedure CursorOff;
begin
ttySendStr(#27'[?1c');
end;
{******************************************************************************
Initialization
******************************************************************************}
var
OldIO : termio.TermIos;
inputRaw, outputRaw: boolean;
procedure saveRawSettings(const tio: termio.termios);
Begin
with tio do
begin
inputRaw :=
((c_iflag and (IGNBRK or BRKINT or PARMRK or ISTRIP or
INLCR or IGNCR or ICRNL or IXON)) = 0) and
((c_lflag and (ECHO or ECHONL or ICANON or ISIG or IEXTEN)) = 0);
outPutRaw :=
((c_oflag and OPOST) = 0) and
((c_cflag and (CSIZE or PARENB)) = 0) and
((c_cflag and CS8) <> 0);
end;
end;
procedure restoreRawSettings(tio: termio.termios);
begin
with tio do
begin
if inputRaw then
begin
c_iflag := c_iflag and (not (IGNBRK or BRKINT or PARMRK or ISTRIP or
INLCR or IGNCR or ICRNL or IXON));
c_lflag := c_lflag and
(not (ECHO or ECHONL or ICANON or ISIG or IEXTEN));
end;
if outPutRaw then
begin
c_oflag := c_oflag and not(OPOST);
c_cflag := c_cflag and not(CSIZE or PARENB) or CS8;
end;
end;
end;
Procedure SetRawMode(b:boolean);
Var
Tio : Termios;
Begin
if b then
begin
TCGetAttr(1,Tio);
SaveRawSettings(Tio);
OldIO:=Tio;
CFMakeRaw(Tio);
end
else
begin
RestoreRawSettings(OldIO);
Tio:=OldIO;
end;
TCSetAttr(1,TCSANOW,Tio);
End;
procedure GetXY(var x,y:byte);
var
fds : tfdSet;
i,j,
readed : longint;
buf : array[0..255] of char;
s : string[16];
begin
x:=0;
y:=0;
s:=#27'[6n';
fpWrite(0,s[1],length(s));
fpFD_ZERO(fds);
fpFD_SET(1,fds);
if (fpSelect(2,@fds,nil,nil,1000)>0) then
begin
readed:=fpRead(1,buf,sizeof(buf));
i:=0;
while (i+5<readed) and (buf[i]<>#27) and (buf[i+1]<>'[') do
inc(i);
if i+5<readed then
begin
s:=space(16);
move(buf[i+2],s[1],16);
i:=Pos(';',s);
if i>0 then
begin
Val(Copy(s,1,i-1),y);
j:=Pos('R',s);
if j=0 then
j:=length(s);
Val(Copy(s,i+1,j-(i+1)),x);
end;
end;
end;
end;
Procedure GetConsoleBuf;
var
WinInfo : TWinSize;
begin
if Assigned(ConsoleBuf) then
FreeMem(ConsoleBuf,ScreenHeight*ScreenWidth*2);
ScreenWidth:=0;
ScreenHeight:=0;
if (not OutputRedir) and (fpIOCtl(TextRec(Output).Handle,TIOCGWINSZ,@Wininfo)>=0) then
begin
ScreenWidth:=Wininfo.ws_col;
ScreenHeight:=Wininfo.ws_row;
end;
// Set some arbitrary defaults which make some sense...
If (ScreenWidth=0) then
ScreenWidth:=80;
If (ScreenHeight=0) then
ScreenHeight:=25;
GetMem(ConsoleBuf,ScreenHeight*ScreenWidth*2);
FillChar(ConsoleBuf^,ScreenHeight*ScreenWidth*2,0);
end;
Initialization
{ Redirect the standard output }
assigncrt(Output);
Rewrite(Output);
TextRec(Output).Handle:=StdOutputHandle;
assigncrt(Input);
Reset(Input);
TextRec(Input).Handle:=StdInputHandle;
{ Are we redirected to a file ? }
OutputRedir:= IsAtty(TextRec(Output).Handle)=-1;
{ does the input come from another console or from a file? }
InputRedir :=
(IsAtty(TextRec(Input).Handle)=-1) or
(not OutputRedir and
(TTYName(TextRec(Input).Handle) <> TTYName(TextRec(Output).Handle)));
{ Get Size of terminal and set WindMax to the window }
GetConsoleBuf;
WinMinX:=1;
WinMinY:=1;
WinMaxX:=ScreenWidth;
WinMaxY:=ScreenHeight;
WindMax:=((ScreenHeight-1) Shl 8)+(ScreenWidth-1);
{Get Current X&Y or Reset to Home}
if OutputRedir then
begin
CurrX:=1;
CurrY:=1;
end
else
begin
{ Set default Terminal Settings }
SetRawMode(True);
{ Get current X,Y if not set already }
GetXY(CurrX,CurrY);
if (CurrX=0) then
begin
CurrX:=1;
CurrY:=1;
ttySendStr(#27'[H');
end;
{Reset Attribute (TextAttr=7 at startup)}
ttySendStr(#27'[m');
end;
Finalization
ttyFlushOutput;
SetRawMode(False);
{ remove console buf }
if Assigned(ConsoleBuf) then
FreeMem(ConsoleBuf,ScreenHeight*ScreenWidth*2);
End.
{
$Log$
Revision 1.17 2004-02-08 16:22:20 michael
+ Moved CRT interface to common include file
Revision 1.16 2003/11/24 22:27:25 michael
+ Bugfix for bug 2741
Revision 1.15 2003/11/19 17:11:40 marco
* termio unit
Revision 1.14 2003/11/17 10:05:51 marco
* threads for FreeBSD. Not working tho
Revision 1.13 2003/09/16 20:52:24 marco
* small cleanups. Mostly killing of already commented code in unix etc
Revision 1.12 2003/09/16 16:13:56 marco
* fdset functions renamed to fp<posix name>
Revision 1.11 2003/09/14 20:15:01 marco
* Unix reform stage two. Remove all calls from Unix that exist in Baseunix.
Revision 1.10 2002/09/07 16:01:27 peter
* old logs removed and tabs fixed
Revision 1.9 2002/05/31 13:37:24 marco
* more Renamefest
}
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