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- ; File......: PUTKEY.ASM
- ; Author....: Ted Means
- ; Date......: $Date: 15 Aug 1991 23:07:10 $
- ; Revision..: $Revision: 1.2 $
- ; Log file..: $Logfile: E:/nanfor/src/putkey.asv $
- ;
- ; This is an original work by Ted Means and is placed in the
- ; public domain.
- ;
- ; Modification history:
- ; ---------------------
- ;
- ; $Log: E:/nanfor/src/putkey.asv $
- ;
- ; Rev 1.2 15 Aug 1991 23:07:10 GLENN
- ; Forest Belt proofread/edited/cleaned up doc
- ;
- ; Rev 1.1 14 Jun 1991 19:54:56 GLENN
- ; Minor edit to file header
- ;
- ; Rev 1.0 01 Apr 1991 01:03:48 GLENN
- ; Nanforum Toolkit
- ;
-
- ; $DOC$
- ; $FUNCNAME$
- ; FT_PUTKEY()
- ; $CATEGORY$
- ; Keyboard/Mouse
- ; $ONELINER$
- ; Stuff a keystroke into the keyboard buffer
- ; $SYNTAX$
- ; FT_PUTKEY( <nKeyValue> ) -> lResult
- ; $ARGUMENTS$
- ; <nKeyValue> is the INKEY() value of the keystroke to be stuffed.
- ; $RETURNS$
- ; .T. if the keystroke was put into the keyboard buffer.
- ; .F. if nKeyValue was invalid or the buffer was full.
- ; $DESCRIPTION$
- ; This function is similar to the KEYBOARD command, with a few
- ; exceptions. First, this function does not clear the keyboard buffer
- ; before inserting the keystroke. In addition, since it uses the
- ; Inkey() value, you can stuff any key, including function keys, into
- ; the keyboard buffer. However, this also means that unlike the KEYBOARD
- ; command, you can only stuff one keystroke at a time.
- ;
- ; You can easily create a User-Defined Command that makes this function
- ; even more like the KEYBOARD command. For example,
- ;
- ; #command KEYSTROKE <key> => FT_PUTKEY( <key> )
- ;
- ; will create a command called KEYSTROKE that could be used as a
- ; companion command to KEYBOARD. The only difference is that it would
- ; insert a single keystroke instead of a string.
- ;
- ; Be aware that early releases of Clipper 5.0 have a bug in their
- ; keyboard handling. Among other things, Set Typeahead does not work
- ; correctly, so this function may at times return .T. even though the
- ; keyboard buffer is full. The best solution is not to attempt stuffing
- ; more than 15 keys at a time into the keyboard buffer.
- ;
- ; This function is written to adhere to Turbo Assembler's IDEAL mode.
- ; To use another assembler, rearrange the SEGMENT and PROC directives
- ; and make any other necessary changes to the source code.
- ; $EXAMPLES$
- ; FT_PUTKEY( -9 ) // Stuff the F10 key
- ; FT_PUTKEY( 276 ) // Stuff the Alt T key
- ; KEYSTROKE 28 // Stuff the F1 key using a User-Defined Command
- ; $END$
-
-
- IDEAL
-
- Public FT_PUTKEY
-
- EXTRN __PARINFO:FAR
- EXTRN __PARNI:FAR
- EXTRN __RETL:FAR
-
- SEGMENT _NANFOR WORD PUBLIC "CODE"
- ASSUME CS:_NANFOR
-
- PROC FT_PUTKEY FAR
-
- XOR AX,AX ; PREPARE TO COUNT PARAMS
- PUSH AX ; SAVE ON STACK
- CALL __PARINFO ; GET PARAM COUNT
- ADD SP,2 ; REALIGN STACK
- OR AX,AX ; ZERO PARAMS?
- JNZ TEST1 ; IF NOT, CONTINUE
- JMP DONE ; RETURN VALUE = FALSE, GO TO END
-
- TEST1: MOV AX,1 ; PREPARE TO CHECK PARAMETER #1
- PUSH AX ; SAVE PARAMETER # ON STACK
- CALL __PARINFO ; CALL PARAMETER INFO ROUTINE
- ADD SP,2 ; REALIGN STACK
- TEST AX,2 ; IS PARAMETER NUMERIC?
- JNZ GET1 ; IF SO, CONTINUE
- BADPARAM:XOR AX,AX ; SET RETURN VALUE TO FALSE
- JMP DONE ; GO TO END
-
- GET1: MOV AX,1 ; PREPARE TO RETRIEVE PARAMETER #1
- PUSH AX ; SAVE PARAMETER # ON STACK
- CALL __PARNI ; RETRIEVE PARAMETER
- ADD SP,2 ; REALIGN STACK
-
- CMP AX,385 ; TEST HIGHEST INKEY()
- JG BadParam ; Bad INKEY() value
- Cmp AX,-39 ; Test lowest INKEY()
- JL BadParam ; Process error
-
- CtrlF1: Mov CL,0 ; Set ASCII value to null
- Cmp AX,-10 ; Is Ctrl F1 thru Alt F10?
- JG F2 ; If not, check next range
- Neg AX ; Get absolute value of AX
- Add AL,74 ; Translate INKEY() to scan code
- Mov CH,AL ; Move scan code to CH
- JMP StuffIt ; Stuff the keystroke
-
- F2: Or AX,AX ; See if key is F2 thru F10
- JNS F1 ; If not, check next range
- Neg AX ; Get absolute value of AX
- Add AL,59 ; Translate INKEY() to scan code
- Mov CH,AL ; Move scan code to CH
- JMP StuffIt ; Stuff the keystroke
-
- F1: Cmp AX,28 ; See if key is F1
- JNE CtrlF ; If not, check next key
- Mov CH,59 ; Supply scan code for F1
- JMP StuffIt ; Stuff the keystroke
-
- CtrlF: Cmp AX,6 ; See if key is Ctrl F or End
- JNE CtrlW ; If not, check next key
- Mov CH,79 ; Supply scan code for End
- JMP StuffIt ; Stuff the keystroke
-
- CtrlW: Cmp AX,23 ; See if key is Ctrl W or Ctrl End
- JNE CtrlHome ; If not, check next key
- Mov CH,117 ; Supply scan code for Ctrl End
- JMP Short StuffIt ; Stuff the keystroke
-
- CtrlHome:Cmp AX,29 ; See if key is Ctrl Home or Ctrl]
- JNE CtrlV ; If not, check next key
- Mov CH,119 ; Supply scan code for Ctrl Home
- JMP Short StuffIt ; Stuff the keystroke
-
- CtrlV: Cmp AX,22 ; See if key is Ins or Ctrl V
- JNE ShiftTab ; If not, check next key
- Mov CH,82 ; Supply scan code for Ctrl V
- JMP Short StuffIt ; Stuff the keystroke
-
- ShiftTab:Cmp AX,271 ; See if key is Shift Tab
- JNE CtrlPgDn ; If not, check next key
- Mov CH,15 ; Supply scan code for Shift Tab
- JMP Short StuffIt ; Stuff the keystroke
-
- CtrlPgDn:Cmp AX,30 ; See if key is Ctrl PgDn
- JNE CtrlPgUp ; If not, check next key
- Mov CH,118 ; Supply scan code for Ctrl PgDn
- JMP Short StuffIt ; Stuff the keystroke
-
- CtrlPgUp:Cmp AX,31 ; See if key is Ctrl PgUp
- JNE AltQ ; If not, check next key
- Mov CH,132 ; Supply scan code for Ctrl PgUp
- JMP Short StuffIt ; Stuff the keystroke
-
- AltQ: Cmp AX,272 ; See if key is Alt Q . . .
- JL ASCII
- Cmp AX,281 ; . . . thru Alt P
- JG AltA
- Mov CH,AL
- JMP Short StuffIt
-
- AltA: Cmp AX,286 ; See if key is Alt A . . .
- JNL AltL
- JMP BadParam
- AltL: Cmp AX,294 ; . . . thru Alt L
- JG AltZ
- Mov CH,AL
- JMP Short StuffIt
-
- AltZ: Cmp AX,300 ; See if key is Alt Z . . .
- JNL AltM
- JMP BadParam
- AltM: Cmp AX,306 ; . . . thru Alt M
- JG Alt1
- Mov CH,AL
- Mov CL,0
- JMP Short StuffIt
-
- Alt1: Cmp AX,376 ; See if key is Alt 1 . . .
- JNL AltNum
- JMP BadParam
- AltNum: Mov CH,AL
- Mov CL,0
- JMP Short StuffIt
-
- ASCII: Or AH,AH ; See if key is plain ASCII
- JZ Okay
- JMP BadParam
- Okay: Mov CX,AX
-
- StuffIt: CLI ; Disable keyboard temporarily
- Push DS ; Save DS
- Xor AX,AX ; Clear AX
- Mov DS,AX ; Point DS to low RAM
- Mov AX,[Word Ptr 41Ch] ; Get tail pointer
- Add AX,2 ; Make room for keystroke
- Cmp AX,3Eh ; Need to wrap?
- JNE IsItFull ; No, so continue
- Mov AX,1Eh ; Wrap tail
- IsItFull:Cmp AX,[Word Ptr 41Ah] ; Is buffer full?
- JNE PutChar ; No, so continue
- Xor AX,AX ; Set return value to .F.
- Jmp Short Exit ; Quit
-
- PutChar: Mov BX,[Word Ptr 41Ch] ; Get tail pointer
- Add BX,400h ; Adjust offset by constant
- Mov [Word Ptr BX],CX ; Stuff keystroke
- Mov [Word Ptr 41Ch],AX ; Save new buffer tail
- Mov AX,1 ; Set return value to .T.
-
- Exit: STI ; Enable keystrokes again
- Pop DS ; Restore DS
-
- Done: Push AX ; Save return value on stack
- Call __RetL ; Return it to Clipper app
- Add SP,2 ; Realign stack
- Ret
- Endp FT_PutKey
- Ends _NanFor
- End