{
    This file is part of the Free Pascal run time library.

    A file in Amiga system run time library.
    Copyright (c) 1998-2003 by Nils Sjoholm
    member of the Amiga RTL 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.

 **********************************************************************}

{
        keymap.resource definitions and console.device key map definitions
}

{
    History:

    Added the defines use_amiga_smartlink and
    use_auto_openlib. Implemented autoopening
    of the library.
    14 Jan 2003.

    Changed integer > smallint,
            cardinal > longword.
    09 Feb 2003.

    nils.sjoholm@mailbox.swipnet.se Nils Sjoholm
}
{$PACKRECORDS 2}

{$IFNDEF FPC_DOTTEDUNITS}
unit keymap;
{$ENDIF FPC_DOTTEDUNITS}

INTERFACE

{$IFDEF FPC_DOTTEDUNITS}
uses Amiga.Core.Exec, Amiga.Core.Inputevent;
{$ELSE FPC_DOTTEDUNITS}
uses exec, inputevent;
{$ENDIF FPC_DOTTEDUNITS}

Type

    pKeyMap = ^tKeyMap;
    tKeyMap = record
        km_LoKeyMapTypes        : Pointer;
        km_LoKeyMap             : Pointer;
        km_LoCapsable           : Pointer;
        km_LoRepeatable         : Pointer;
        km_HiKeyMapTypes        : Pointer;
        km_HiKeyMap             : Pointer;
        km_HiCapsable           : Pointer;
        km_HiRepeatable         : Pointer;
    end;


    pKeymapNode = ^tKeyMapNode;
    tKeyMapNode = record
        kn_Node         : tNode;         { including name of keymap }
        kn_KeyMap       : tKeyMap;
    end;

{ the structure of keymap.resource }

    pKeyMapResource = ^tKeyMapResource;
    tKeyMapResource = record
        kr_Node         : tNode;
        kr_List         : tList;         { a list of KeyMapNodes }
    end;


Const

{ Key Map Types }

    KC_NOQUAL           = 0;
    KC_VANILLA          = 7;    { note that SHIFT+ALT+CTRL is VANILLA }
    KCB_SHIFT           = 0;
    KCF_SHIFT           = $01;
    KCB_ALT             = 1;
    KCF_ALT             = $02;
    KCB_CONTROL         = 2;
    KCF_CONTROL         = $04;
    KCB_DOWNUP          = 3;
    KCF_DOWNUP          = $08;

    KCB_DEAD            = 5;    { may be dead or modified by dead key:  }
    KCF_DEAD            = $20;  {   use dead prefix bytes               }

    KCB_STRING          = 6;
    KCF_STRING          = $40;

    KCB_NOP             = 7;
    KCF_NOP             = $80;


{ Dead Prefix Bytes }

    DPB_MOD             = 0;
    DPF_MOD             = $01;
    DPB_DEAD            = 3;
    DPF_DEAD            = $08;

    DP_2DINDEXMASK      = $0f;  { mask for index for 1st of two dead keys }
    DP_2DFACSHIFT       = 4;    { shift for factor for 1st of two dead keys }

VAR KeymapBase : pLibrary = nil;

const
    KEYMAPNAME : PAnsiChar = 'keymap.library';

{$if defined(AMIGA_V1_2_ONLY)}
function MapRawKey(event: PInputEvent; Buffer: PAnsiChar; Length: LongInt; keyMap: PKeyMap): SmallInt;
{$else}
FUNCTION AskKeyMapDefault : pKeyMap; syscall KeymapBase 036;
FUNCTION MapANSI(thestring : PAnsiChar location 'a0'; count : LONGINT location 'd0'; buffer : PAnsiChar location 'a1'; length : LONGINT location 'd1'; keyMap : pKeyMap location 'a2') : LONGINT; syscall KeymapBase 048;
FUNCTION MapRawKey(event : pInputEvent location 'a0'; buffer : PAnsiChar location 'a1'; length : LONGINT location 'd1'; keyMap : pKeyMap location 'a2') : smallint; syscall KeymapBase 042;
PROCEDURE SetKeyMapDefault(keyMap : pKeyMap location 'a0'); syscall KeymapBase 030;
{$endif}

IMPLEMENTATION

{$if defined(AMIGA_V1_2_ONLY)}
var
  ConDev: PDevice = nil;
  ConMsgPort: PMsgPort = nil;
  ConIOReq: PIORequest = nil;

function RawKeyConvert(Events: PInputEvent location 'a0'; Buffer: PAnsiChar location 'a1'; Length: LongInt location 'd1'; KeyMap: PKeyMap location 'a2'): LongInt; syscall ConDev 048;

function MapRawKey(event: PInputEvent; Buffer: PAnsiChar; Length: LongInt; keyMap: PKeyMap): SmallInt;
begin
  if not Assigned(ConDev) then
  begin
    ConMsgPort := CreatePort(nil, 0);
    ConIOReq := CreateExtIO(ConMsgPort, SizeOf(TIOStdReq));

    OpenDevice('console.device', -1, ConIOReq, 0);

    ConDev := ConIOReq^.io_Device;
  end;
  if Assigned(ConDev) then
    MapRawKey := RawKeyConvert(event, Buffer, length, keymap)
  else
    MapRawKey := 0;
end;

procedure CloseKeyMapConsole;
begin
  if Assigned(ConDev) and Assigned(ConIOReq) then
  begin
    CloseDevice(ConIOReq);
    DeleteExtIO(ConIOReq);
  end;
  ConDev := nil;
  ConIOReq := nil;
  if Assigned(ConMsgPort) then
    DeletePort(ConMsgPort);
  ConMsgPort := nil;
end;

{$endif}

const
    { Change VERSION and LIBVERSION to proper values }
    VERSION : string[2] = '0';
    LIBVERSION : longword = 0;

initialization
  KeymapBase := OpenLibrary(KEYMAPNAME,LIBVERSION);
finalization
  if Assigned(KeymapBase) then
    CloseLibrary(KeymapBase);
  {$if defined(AMIGA_V1_2_ONLY)}
  CloseKeyMapConsole;
  {$endif}
END. (* UNIT KEYMAP *)