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Unit Mouse;
{$C MOVEABLE PRELOAD PERMANENT}
{$A-}
Interface
const EvMouseMove = 1;
EvLtPress = 2;
EvLtRelease = 4;
EvRtPress = 8;
EvRtRelease = $10;
EvCtPress = $20;
EvCtRelease = $40;
AllEvents = $7F;
DisableHandler = 0;
LeftButton = 1;
RightButton = 2;
CenterButton = 4;
type PointerShape = array [1..2,1..16] of word;
const MousePresent : boolean = False;
MouseHandlerInstalled : boolean = False;
MouseDisabled : boolean = True;
var MouseX,MouseY : integer;
MouseButtons : word;
MouseEvent : word;
StatusBufferSize : word;
{$IFDEF DPMI}
StatusBufferSel,
StatusBufferSeg : word;
{$ELSE}
const StatusBuffer : pointer = nil;
{$ENDIF}
procedure EnableMouse;
procedure DisableMouse;
procedure ShowMouse;
procedure HideMouse;
procedure SuspendMouse;
procedure ResumeMouse;
procedure HookMouseEvent (event:byte; handler:pointer);
procedure UnHookMouseEvent (event:byte);
procedure SetPointerShape (var shape:PointerShape; hx,hy:word);
procedure SetMouseSensitivity (mx,my,mt:byte);
procedure SetMouseRange (x1,y1,x2,y2:word);
procedure MoveMouse (x,y:word);
procedure AllocateStatusBuffer;
{$IFDEF DPMI}
procedure DeAllocateStatusBuffer;
{$ENDIF}
procedure SaveMouseStatus;
procedure RestoreMouseStatus;
Implementation
{$IFDEF DPMI}
uses WinAPI;
type TRealRegs = record
RealEDI: Longint;
RealESI: Longint;
RealEBP: Longint;
Reserved: Longint;
RealEBX: Longint;
RealEDX: Longint;
RealECX: Longint;
RealEAX: Longint;
RealFlags: Word;
RealES: Word;
RealDS: Word;
RealFS: Word;
RealGS: Word;
RealIP: Word;
RealCS: Word;
RealSP: Word;
RealSS: Word;
end;
{$ENDIF}
procedure NullHandler; far; assembler;
asm
end;
const HandlerTable : array [0..6] of procedure =
( NullHandler,NullHandler,NullHandler,NullHandler,NullHandler,NullHandler,NullHandler );
HandlerBusy : boolean = False;
procedure MouseHandler; far; assembler;
asm
push ds
mov si,seg MouseDisabled
mov ds,si
cmp MouseDisabled,True
jne @@4
cmp ax,EvLtPress
jne @@3
mov ah,5
mov cl,13
int 16h
jmp @@3
@@4: cmp HandlerBusy,True
je @@3
mov HandlerBusy,True
mov MouseEvent,ax
mov MouseX,cx
mov MouseY,dx
mov MouseButtons,bx
lea si,HandlerTable
@@1: test al,1
jne @@2
shr al,1
add si,4
jmp @@1
@@2: call dword ptr [si]
mov HandlerBusy,False
@@3: pop ds
end;
{$IFDEF DPMI}
procedure MouseHandlerCB; far; assembler;
asm
{ ds:si -> real-mode ss:sp
es:di -> registers }
push si
push ds
push di
push es
{ set up registers for mouse handler }
mov ax,es:[di].TRealRegs.RealEAX.word
mov bx,es:[di].TRealRegs.RealEBX.word
mov cx,es:[di].TRealRegs.RealECX.word
mov dx,es:[di].TRealRegs.RealEDX.word
call MouseHandler
pop es
pop di
pop ds
pop si
{ simulate real-mode return }
cld
lodsw
mov es:[di].TRealRegs.RealIP, ax
lodsw
mov es:[di].TRealRegs.RealCS, ax
add es:[di].TRealRegs.RealSP, 4
{ es:di -> registers }
iret
end;
const MouseHandlerRMCB : pointer = nil;
var MouseHandlerRegs : TRealRegs;
procedure EnableMouse; assembler;
asm
cmp MousePresent,True
jne @@1
cmp MouseHandlerInstalled,True
je @@1
{ allocate real-mode callback if needed }
mov ax, MouseHandlerRMCB.word.2
or ax, ax
jnz @cbok
push ds
push ds
pop es
mov di, offset MouseHandlerRegs
mov ax, seg MouseHandlerCB
mov ds, ax
mov si, offset MouseHandlerCB
mov ax, 0303h
int 31h
pop ds
jc @cbfail { ignore silently }
mov MouseHandlerRMCB.word.0, dx
mov MouseHandlerRMCB.word.2, cx
@cbok:
mov MouseHandlerRegs.RealEAX.word, 0Ch
mov MouseHandlerRegs.RealECX.word, AllEvents
mov ax, MouseHandlerRMCB.word.0
mov MouseHandlerRegs.RealEDX.word, ax
mov ax, MouseHandlerRMCB.word.2
mov MouseHandlerRegs.RealES, ax
mov ax, 300h
mov bx, 33h
mov cx, 0
mov di, offset MouseHandlerRegs
push ds
pop es
int 31h
@cbfail:
mov ax,1
int 33h
mov MouseHandlerInstalled,True
mov MouseDisabled,False
mov MouseX,160
mov MouseY,100
mov MouseButtons,0
@@1:
end;
{$ELSE}
procedure EnableMouse; assembler;
asm
cmp MousePresent,True
jne @@1
cmp MouseHandlerInstalled,True
je @@1
mov ax,0Ch
mov cx,AllEvents
mov dx,seg MouseHandler
mov es,dx
lea dx,MouseHandler
int 33h
mov ax,1
int 33h
mov MouseHandlerInstalled,True
mov MouseDisabled,False
mov MouseX,160
mov MouseY,100
mov MouseButtons,0
@@1:
end;
{$ENDIF}
procedure DisableMouse; assembler;
asm
cmp MouseHandlerInstalled,True
jne @@1
mov ax,0Ch
xor cx,cx
int 33h
mov ax,2
int 33h
mov MouseHandlerInstalled,False
@@1:
end;
procedure ShowMouse; assembler;
asm
mov ax,1
int 33h
end;
procedure HideMouse; assembler;
asm
mov ax,2
int 33h
end;
procedure SuspendMouse; assembler;
asm
mov ax,1Fh
int 33h
end;
procedure ResumeMouse; assembler;
asm
mov ax,20h
int 33h
end;
procedure HookMouseEvent (event:byte; handler:pointer); assembler;
asm
mov al,event
push ds
pop es
lea di,HandlerTable
@@1: test al,1
jne @@2
shr al,1
add di,4
jmp @@1
@@2: mov ax,word ptr handler
stosw
mov ax,word ptr handler+2
stosw
end;
procedure UnHookMouseEvent (event:byte);
begin
HookMouseEvent(event,@NullHandler)
end;
procedure SetPointerShape (var shape:PointerShape; hx,hy:word);
{$IFDEF DPMI}
var segment,selector : word;
{$ENDIF}
begin
asm
{$IFDEF DPMI}
push 0
push 64
call GlobalDOSAlloc
mov segment,dx
mov selector,ax
push ds
lds si,shape
mov es,ax
xor di,di
cld
mov cx,32
rep movsw
pop ds
mov ax,ds
mov es,ax
lea di,RealModeRegs
mov word ptr [di].TRealRegs.RealEAX,9
mov ax,hx
mov word ptr [di].TRealRegs.RealEBX,ax
mov ax,hy
mov word ptr [di].TRealRegs.RealECX,ax
mov word ptr [di].TRealRegs.RealES,dx {dx=segment}
mov word ptr [di].TRealRegs.RealEDX,0
mov word ptr [di].TRealRegs.RealSS,0
mov word ptr [di].TRealRegs.RealSP,0 {SS=SP=0}
mov ax,0300h
mov bx,0033h
xor cx,cx
int 31h
push selector
call GlobalDOSFree
{$ELSE}
mov ax,9
mov bx,hx
mov cx,hy
les dx,shape
int 33h {this causes GPF in Protected Mode}
{$ENDIF}
end;
end;
procedure SetMouseSensitivity (mx,my,mt:byte); assembler;
asm
mov ax,001Ah
xor bx,bx
xor cx,cx
xor dx,dx
mov bl,mx
mov cl,my
mov dl,mt
int 33h
end;
procedure SetMouseRange (x1,y1,x2,y2:word); assembler;
asm
mov ax,7
mov cx,x1
mov dx,x2
int 33h
mov ax,8
mov cx,y1
mov dx,y2
int 33h
end;
procedure MoveMouse (x,y:word); assembler;
asm
mov ax,4
mov cx,x
mov dx,y
int 33h
mov ax,3
int 33h
mov MouseX,cx
mov MouseY,dx
end;
{$IFDEF DPMI}
procedure AllocateStatusBuffer; assembler;
asm
mov ax,15h
int 33h
mov StatusBufferSize,bx
or bx,bx
jz @@1
push 0
push StatusBufferSize
call GlobalDOSAlloc
mov StatusBufferSeg,dx
mov StatusBufferSel,ax
@@1:
end;
procedure DeAllocateStatusBuffer; assembler;
asm
cmp StatusBufferSize,0
jz @@1
push StatusBufferSel
call GlobalDOSFree
@@1:
end;
procedure SaveMouseStatus; assembler;
asm
mov ax,ds
mov es,ax
lea di,RealModeRegs
mov word ptr [di].TRealRegs.RealEAX,16h
mov ax,StatusBufferSize
mov word ptr [di].TRealRegs.RealEBX,ax
mov ax,StatusBufferSeg
mov word ptr [di].TRealRegs.RealES,ax
mov word ptr [di].TRealRegs.RealEDX,0
mov word ptr [di].TRealRegs.RealSS,0
mov word ptr [di].TRealRegs.RealSP,0 {SS=SP=0}
mov ax,0300h
mov bx,0033h
xor cx,cx
int 31h
end;
procedure RestoreMouseStatus; assembler;
asm
mov ax,ds
mov es,ax
lea di,RealModeRegs
mov word ptr [di].TRealRegs.RealEAX,17h
mov ax,StatusBufferSize
mov word ptr [di].TRealRegs.RealEBX,ax
mov ax,StatusBufferSeg
mov word ptr [di].TRealRegs.RealES,ax
mov word ptr [di].TRealRegs.RealEDX,0
mov word ptr [di].TRealRegs.RealSS,0
mov word ptr [di].TRealRegs.RealSP,0 {SS=SP=0}
mov ax,0300h
mov bx,0033h
xor cx,cx
int 31h
end;
{$ELSE}
procedure AllocateStatusBuffer;
begin
asm
mov ax,15h
int 33h
mov StatusBufferSize,bx
end;
if StatusBufferSize<>0 then GetMem(StatusBuffer,StatusBufferSize);
end;
procedure SaveMouseStatus; assembler;
asm
mov ax,16h
les dx,StatusBuffer
mov bx,StatusBufferSize
int 33h
end;
procedure RestoreMouseStatus; assembler;
asm
mov ax,17h
les dx,StatusBuffer
mov bx,StatusBufferSize
int 33h
end;
{$ENDIF}
Begin (* Initialization part *)
asm
xor ax,ax
int 33h
xor bx,bx
and al,1
mov MousePresent,al
end;
End.