guimapky.c

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/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  GUI library key mapping for OS/2 and Windows.
*
****************************************************************************/


#include "guiwind.h"
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include "guimapky.h"
#include "guixutil.h"
#include "guimkey.h"

extern  gui_window      *GUICurrWnd;
extern  bool            EditControlHasFocus;
extern  gui_keystate    KeyState;
#ifndef __OS2_PM__
static  bool            RetTrue = FALSE; /* set to TRUE of app returned
                                            TRUE to last WM_SYSKEYDOWN or
                                            WM_SYSKEYUP message */
#endif

typedef struct {
    char        value;
    char        regular;
    char        shifted;
    gui_key     alt;
    gui_key     ctrl;
} keytable;

static keytable vk_table[] = {
    { 0xbc,     ',',    '<', GUI_KEY_ALT_COMMA,         0       },
    { 0xbe,     '.',    '>', GUI_KEY_ALT_PERIOD,        0       },
    { 0xbf,     '/',    '?', GUI_KEY_ALT_SLASH,         0       },
    { 0xba,     ';',    ':', GUI_KEY_ALT_SEMICOLON,     0       },
    { 0xde,     '\'',   '"', GUI_KEY_ALT_QUOTE,         0       },
    { 0xdb,     '[',    '{', GUI_KEY_ALT_LEFT_BRACKET,  GUI_KEY_CTRL_LEFT_BRACKET       },
    { 0xdd,     ']',    '}', GUI_KEY_ALT_RIGHT_BRACKET, GUI_KEY_CTRL_RIGHT_BRACKET      },
    { 0xdc,     '\\',   '|', GUI_KEY_ALT_BACKSLASH,     GUI_KEY_CTRL_BACKSLASH          },
    { 0xc0,     '`',    '~', GUI_KEY_ALT_BACKQUOTE,     0       },
    { 0xbd,     '-',    '_', GUI_KEY_ALT_MINUS,         GUI_KEY_CTRL_MINUS              },
    { 0xbb,     '=',    '+', GUI_KEY_ALT_EQUAL,         0       }
};

static char num_regular[] = "1234567890";
static char num_shifted[] = "!@#$%^&*()";

#ifndef __OS2_PM__
static char c_regular[]   = "1234567890`-=[]\\;',./";
static char c_shifted[]   = "!@#$%^&*()~_+{}|:\"<>?";
#else
static char c_regular[]   = "1234567890`-=[]\\;',./*+";
static char c_shifted[]   = "!@#$%^&*()~_+{}|:\"<>?*+";
#endif

#define         EV_FUNC( n )            ( 0x13A + (n) )
#define         EV_SHIFT_FUNC( n )      ( 0x153 + (n) )
#define         EV_CTRL_FUNC( n )       ( 0x15d + (n) )
#define         EV_ALT_FUNC( n )        ( 0x167 + (n) )
#define         EV_CTRL( n )            ( (n) + 1 )
#define         EV_KEYPAD_FUNC( n )     ( 0x030 + (n) )
#define         EV_ALT_NUMS( n )        ( 0x178 + (n) )


static gui_key AltFunc[] =
{
GUI_KEY_ALT_A,
GUI_KEY_ALT_B,
GUI_KEY_ALT_C,
GUI_KEY_ALT_D,
GUI_KEY_ALT_E,
GUI_KEY_ALT_F,
GUI_KEY_ALT_G,
GUI_KEY_ALT_H,
GUI_KEY_ALT_I,
GUI_KEY_ALT_J,
GUI_KEY_ALT_K,
GUI_KEY_ALT_L,
GUI_KEY_ALT_M,
GUI_KEY_ALT_N,
GUI_KEY_ALT_O,
GUI_KEY_ALT_P,
GUI_KEY_ALT_K,
GUI_KEY_ALT_R,
GUI_KEY_ALT_S,
GUI_KEY_ALT_T,
GUI_KEY_ALT_U,
GUI_KEY_ALT_V,
GUI_KEY_ALT_W,
GUI_KEY_ALT_X,
GUI_KEY_ALT_Y,
GUI_KEY_ALT_Z
};

static bool convert_shiftkeys( WORD vk, gui_key *key,
                               char *regular, char *shifted )
{
    char        *str;

    str = strchr( regular, vk );
    if( SHIFT ) {
        if( str != NULL ) {
            *key = *(shifted+(str-regular));
            return( TRUE );
        } else {
            str = strchr( shifted, vk );
            if( str != NULL ) {
                *key = *str;
                return( TRUE );
            }
        }
    } else if( !(CTRL) && !(ALT) ) {
        if( str != NULL ) {
            *key = *str;
            return( TRUE );
        }
    }
    return( FALSE );
}

static bool discard_this_vk( WORD vk )
{
    bool        discard;

    discard = FALSE;

    switch( vk ) {
    case VK_SHIFT:
    case VK_CONTROL:
    case VK_CAPITAL :
#ifndef __OS2_PM__
    case VK_MENU:
#endif
    case VK_NUMLOCK :
    case VK_PAUSE :
    case VK_LBUTTON :
    case VK_RBUTTON :
    case VK_MBUTTON :
    case VK_SNAPSHOT :
#ifdef __OS2_PM__
    case VK_ALT :
#else
    case VK_CLEAR :
    case VK_SELECT :
    case VK_CANCEL :
    case VK_EXECUTE :
    case VK_HELP :
    case VK_SEPARATOR :
#endif
        discard = TRUE;
        break;
    }

    return( discard );
}

static bool convert_numeric( WORD ch, gui_key *key )
{
    int         t;

    if( isdigit( ch ) ) {
        if( SHIFT ) {
            if( convert_shiftkeys( ch, key, num_regular, num_shifted ) ) return( TRUE );
            *key = ch;
            return( TRUE );
        } else if( ALT ) {
            t = ch - '1';
            if( t == -1 ) {
                t = 9;
            }
            *key = EV_ALT_NUMS( t );
            return( TRUE );
        } else if( CTRL ) {
            if( ch == '2' ) {
                *key = GUI_KEY_CTRL_2;
                return( TRUE );
            } else if( ch == '6' ) {
                *key = GUI_KEY_CTRL_6;
                return( TRUE );
            }
        } else {
            *key = ch;
            return( TRUE );
        }
    }

    return( FALSE );
}

static bool convert_alpha( WORD ch, gui_key *key )
{
    WORD        t;

    if( isalpha( ch ) ) {
        t = toupper(ch) - 'A';
        if( ALT ) {
            *key = AltFunc[ t ];
        } else if( CTRL ) {
            *key = EV_CTRL( t );
        } else if ( SHIFT ) {
            *key = 'A'+ t;
        } else {
            *key = 'a' + t;
        }
        return( TRUE );
    }

    return( FALSE );
}

static bool convert_otherkeys( WORD vk, gui_key *key )
{
    return( convert_shiftkeys( vk, key, c_regular, c_shifted ) );
}

static bool convert_ascii( WORD ch, gui_key *key )
{
    if( convert_alpha( ch, key ) ) return( TRUE );
    if( convert_numeric( ch, key ) ) return( TRUE );
    if( convert_otherkeys( ch, key ) ) return( TRUE );
    return( FALSE );
}

static bool convert_keytable( WORD vk, gui_key *key )
{
    int         i;

    for( i=0; i < ( sizeof(vk_table) / sizeof(vk_table[0]) ); i++ ) {
        if( vk == vk_table[i].value ) {
            if( SHIFT ) {
                *key = vk_table[i].shifted;
            } else if ( ALT ) {
                *key = vk_table[i].alt;
            } else if ( CTRL ) {
                *key = vk_table[i].ctrl;
            } else {
                *key = vk_table[i].regular;
            }
            return( TRUE );
        }
    }
    return( FALSE );
}

#ifndef __OS2_PM__
static bool convert_numpad( WORD vk, gui_key *key )
{
    if( ( vk >= VK_NUMPAD0 ) && ( vk <= VK_NUMPAD9 ) ) {
        *key = EV_KEYPAD_FUNC( vk - VK_NUMPAD0 );
        return( TRUE );
    }
    return( FALSE );
}
#endif

static bool GUIConvertVirtKeyToGUIKey( WORD vk, gui_key *key )
{
    int         t;

    if( key == NULL ) {
        return( FALSE );
    }

    *key = 0;

    if( discard_this_vk( vk ) ) {
        return( FALSE );
    } else if( vk >= VK_F1 && vk <= VK_F10 ) {
        t = vk - VK_F1 + 1;
        if( ALT ) {
            *key = EV_ALT_FUNC( t );
        } else if( CTRL ) {
            *key = EV_CTRL_FUNC( t );
        } else if( SHIFT ) {
            *key = EV_SHIFT_FUNC( t );
        } else {
            *key = EV_FUNC( t );
        }
#ifndef __OS2_PM__
    } else if( convert_numpad( vk, key ) ) {
        // do nothing
#endif
    } else {
        switch( vk ) {
        case VK_TAB:
            *key = GUIMapKey( GUI_KEY_TAB );
            break;
        case VK_BACK:
            *key= GUIMapKey( GUI_KEY_BACKSPACE );
            break;
        case VK_ESCAPE:
            *key= GUIMapKey( GUI_KEY_ESCAPE );
            break;
#ifdef __OS2_PM__
        case VK_ENTER:
#endif
        case VK_RETURN:
            *key= GUIMapKey( GUI_KEY_ENTER );
            break;