/* $TOG: imConv.c /main/11 1997/02/11 17:48:36 kaleb $ */
/******************************************************************

              Copyright 1991, 1992 by Fuji Xerox Co.,Ltd.
	      Copyright 1993, 1994 by FUJITSU LIMITED

Permission to use, copy, modify, distribute, and sell this software
and its documentation for any purpose is hereby granted without fee,
provided that the above copyright notice appear in all copies and
that both that copyright notice and this permission notice appear
in supporting documentation, and that the name of Fuji Xerox Co.,Ltd.
, and that the name of FUJITSU LIMITED not be used in advertising or
publicity pertaining to distribution of the software without specific,
 written prior permission.
Fuji Xerox Co.,Ltd. , and FUJITSU LIMITED makes no representations about
the suitability of this software for any purpose.
It is provided "as is" without express or implied warranty.

FUJI XEROX CO.,LTD. AND FUJITSU LIMITED DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL FUJI XEROX CO.,LTD.
AND FUJITSU LIMITED BE LIABLE FOR ANY SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
THE USE OR PERFORMANCE OF THIS SOFTWARE.

  Auther:   Kazunori Nishihara, Fuji Xerox Co.,Ltd.
                                kaz@ssdev.ksp.fujixerox.co.jp
  Modifier: Takashi Fujiwara    FUJITSU LIMITED
                                fujiwara@a80.tech.yk.fujitsu.co.jp

******************************************************************/
/* $XFree86: xc/lib/X11/imConv.c,v 1.5.2.4 1997/07/05 15:55:34 dawes Exp $ */

#define NEED_EVENTS
#include <stdio.h>
#include "Xlibint.h"
#include "Xlcint.h"
#include "Ximint.h"
#include "XlcPubI.h"

#ifdef XKB
#include "XKBlib.h"
#define	XLOOKUPSTRING lookup_string
extern unsigned char _Xcyrillic[];
#define cyrillic _Xcyrillic
extern unsigned char _Xkoi8[];
#define koi8 _Xkoi8
extern unsigned char _Xgreek[];
#define greek _Xgreek
#else
#define	XLOOKUPSTRING XLookupString
/* maps Cyrillic keysyms to 8859-5 */
static unsigned char cyrillic[128] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80 - */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90 - */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0xf2, 0xf3, 0xf1, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xa0 - */
    0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0x00, 0xfe, 0xff,
    0xf0, 0xa2, 0xa3, 0xa1, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xb0 - */
    0xa8, 0xa9, 0xaa, 0xab, 0xac, 0x00, 0xae, 0xaf,
    0xee, 0xd0, 0xd1, 0xe6, 0xd4, 0xd5, 0xe4, 0xd3, /* 0xc0 - */
    0xe5, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde,
    0xdf, 0xef, 0xe0, 0xe1, 0xe2, 0xe3, 0xd6, 0xd2, /* 0xd0 - */
    0xec, 0xeb, 0xd7, 0xe8, 0xed, 0xe9, 0xe7, 0xea,
    0xce, 0xb0, 0xb1, 0xc6, 0xb4, 0xb5, 0xc4, 0xb3, /* 0xe0 - */
    0xc5, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe,
    0xbf, 0xcf, 0xc0, 0xc1, 0xc2, 0xc3, 0xb6, 0xb2, /* 0xf0 - */
    0xcc, 0xcb, 0xb7, 0xc8, 0xcd, 0xc9, 0xc7, 0xca
};

/* maps Cyrillic keysyms to KOI8-R */
static unsigned char koi8[128] =
   {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0xa3, 0x00, 0x00, 0x00, 0x00, /* 10 */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0xb3, 0x00, 0x00, 0x00, 0x00, /* 11 */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 12 */
    0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 13 */
    0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 14 */
    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 15 */
    0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff};


/* maps Greek keysyms to 8859-7 */
static unsigned char greek[128] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80 - */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90 - */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0xb6, 0xb8, 0xb9, 0xba, 0xda, 0x00, 0xbc, /* 0xa0 - */
    0xbe, 0xdb, 0x00, 0xbf, 0x00, 0x00, 0xb5, 0xaf,
    0x00, 0xdc, 0xdd, 0xde, 0xdf, 0xfa, 0xc0, 0xfc, /* 0xb0 - */
    0xfd, 0xfb, 0xe0, 0xfe, 0x00, 0x00, 0x00, 0x00,
    0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0 - */
    0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
    0xd0, 0xd1, 0xd3, 0x00, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0 - */
    0xd8, 0xd9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0 - */
    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
    0xf0, 0xf1, 0xf3, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0 - */
    0xf8, 0xf9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

#endif

static unsigned char get_code(), get_greek(), get_cyril(), get_koi8();

struct CodesetRec {
    unsigned long kset;
    char *designator;
    unsigned char (*char_code)();
};

static struct CodesetRec codeset[] = {
    {0x00l, "\033-A", NULL},	  /* ISO 8859-1 (Latin 1) */
    {0x01l, "\033-B", get_code},  /* ISO 8859-2 (Latin 2) */
    {0x02l, "\033-C", get_code},  /* ISO 8859-3 (Latin 3) */
    {0x03l, "\033-D", get_code},  /* ISO 8859-4 (Latin 4) */
    {0x04l, "\033)I", get_code},  /* JIS x0201 (Katakana) */
    {0x05l, "\033-G", get_code},  /* ISO 8859-6 (Arabic) */
    {0x06l, "\033-L", get_cyril}, /* ISO 8859-5 (Cyrillic) */
    {0x07l, "\033-F", get_greek}, /* ISO 8859-7 (Greek) */
    {0x0cl, "\033-H", get_code},  /* ISO 8859-8 (Hebrew) */
};

static int codeset_size = sizeof(codeset) / sizeof(codeset[0]);

#define sCyrillic 6
static struct CodesetRec koi8codeset = {
    0x06l, "\033%/1\200\210koi8-r\002", get_koi8  /* KIO8-R (Cyrillic) */
};

static unsigned char
get_code(keysym)
KeySym keysym;
{
    return((unsigned char)(keysym & 0xff));
}

static unsigned char
get_cyril(keysym)
KeySym keysym;
{
    return cyrillic[keysym & 0x7f];
}

static unsigned char
get_koi8(keysym)
KeySym keysym;
{
    return koi8[keysym & 0x7f];
}

static unsigned char
get_greek(keysym)
KeySym keysym;
{
    return greek[keysym & 0x7f];
}

#ifdef XKB
static int lookup_string (event, buffer, nbytes, keysym, status)
    XKeyEvent		*event;
    unsigned char	*buffer;
    int			 nbytes;
    KeySym		*keysym;
    XComposeStatus	*status;
{
    int ret;
    unsigned ctrls = XkbGetXlibControls (event->display);
    XkbSetXlibControls (event->display, 
			XkbLC_ForceLatin1Lookup, XkbLC_ForceLatin1Lookup);
    ret = XLookupString(event, (char *)buffer, nbytes, keysym, status);
    XkbSetXlibControls (event->display, ctrls, ctrls);
    return ret;
}
#endif

#define BUF_SIZE (20)

int
_XimLookupMBText(ic, event, buffer, nbytes, keysym, status)
    Xic			 ic;
    XKeyEvent		*event;
    unsigned char	*buffer;
    int			 nbytes;
    KeySym		*keysym;
    XComposeStatus	*status;
{
    int count, local_count;
    KeySym symbol;
    unsigned long kset;
    struct CodesetRec *cset = (struct CodesetRec *)NULL;
    int i;
    unsigned char c;
    Status	dummy;
    Xim	im = (Xim)ic->core.im;
    XLCd lcd = im->core.lcd;
    char local_buf[BUF_SIZE];
    unsigned char look[BUF_SIZE];

    count = XLOOKUPSTRING(event, (char *)buffer, nbytes, &symbol, status);
    if (keysym) *keysym = symbol;
    if ((nbytes == 0) || (symbol == NoSymbol)) {
	return(count);
    }
    if (count == 0) {
	kset = (symbol >> 8) & 0xffffff;
	for (i = 0; i < codeset_size; i++) {
	    if (kset == codeset[i].kset) {
		cset = &codeset[i];
		break;
	    }
	}
	if (kset == sCyrillic &&
	    (strcmp (XLC_PUBLIC(lcd,encoding_name),"KOI8-R") == 0)) {
	    cset = &koi8codeset;
	}
	if ((cset) && (c = (*cset->char_code)(symbol))) {
	    strcpy(local_buf, cset->designator);
	    local_count = strlen(cset->designator);
	    local_buf[local_count] = c;
	    local_count++;
	    local_buf[local_count] = '\0';
	    if ((count = im->methods->ctstombs(ic->core.im,
				local_buf, local_count,
				(char *)buffer, nbytes, &dummy)) < 0) {
		count = 0;
	    }
	}
    } else if ((count != 1) || (buffer[0] >= 0x80)) { /* not ASCII Encoding */
	memcpy((char *)look, (char *)buffer,count);
	look[count] = '\0';
	if ((count = im->methods->ctstombs(ic->core.im,
				(char *)look, count,
				(char *)buffer, nbytes, &dummy)) < 0) {
	    count = 0;
	}
    }
    return(count);
}

int
_XimLookupWCText(ic, event, buffer, nbytes, keysym, status)
    Xic			 ic;
    XKeyEvent		*event;
    wchar_t		*buffer;
    int			 nbytes;
    KeySym		*keysym;
    XComposeStatus	*status;
{
    int count, local_count;
    KeySym symbol;
    unsigned long kset;
    struct CodesetRec *cset = (struct CodesetRec *)NULL;
    int i;
    unsigned char c;
    Status	dummy;
    Xim	im = (Xim)ic->core.im;
    XLCd lcd = im->core.lcd;
    char local_buf[BUF_SIZE];
    unsigned char look[BUF_SIZE];

    count = XLOOKUPSTRING(event, (char *)look, nbytes, &symbol, status);
    if (keysym) *keysym = symbol;
    if ((nbytes == 0) || (symbol == NoSymbol)) {
	return(count);
    }
    if (count == 0) {
	/* Not ISO 8859-1 Encoding */
	kset = (symbol >> 8) & 0xffffff;
	for (i = 0; i < codeset_size; i++) {
	    if (kset == codeset[i].kset) {
		cset = &codeset[i];
		break;
	    }
	}
	if (kset == sCyrillic &&
	    (strcmp (XLC_PUBLIC(lcd,encoding_name),"KOI8-R") == 0)) {
	    cset = &koi8codeset;
	}
	if ((cset) && (c = (*cset->char_code)(symbol))) {
	    strcpy(local_buf, cset->designator);
	    local_count = strlen(cset->designator);
	    local_buf[local_count] = c;
	    local_count++;
	    local_buf[local_count] = '\0';
	    if ((count = im->methods->ctstowcs(ic->core.im,
				local_buf, local_count,
				buffer, nbytes, &dummy)) < 0) {
		count = 0;
	    }
	}
    } else if ((count == 1) && (look[0] < 0x80)) { /* ASCII Encoding */
	buffer[0] = look[0];
    } else {
	if ((count = im->methods->ctstowcs(ic->core.im,
				(char *)look, count,
				buffer, nbytes, &dummy)) < 0) {
	    count = 0;
	}
    }
    return(count);
}