diff options
Diffstat (limited to 'libX11/modules/im/ximcp')
| -rw-r--r-- | libX11/modules/im/ximcp/imThaiFlt.c | 2835 |
1 files changed, 1421 insertions, 1414 deletions
diff --git a/libX11/modules/im/ximcp/imThaiFlt.c b/libX11/modules/im/ximcp/imThaiFlt.c index e0b3988e3..d22b13038 100644 --- a/libX11/modules/im/ximcp/imThaiFlt.c +++ b/libX11/modules/im/ximcp/imThaiFlt.c @@ -1,1414 +1,1421 @@ -/*********************************************************** - -Copyright 1993, 1998 The Open Group - -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. - -The above copyright notice and this permission notice shall be included in -all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN -AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN -CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - -Except as contained in this notice, the name of The Open Group shall not be -used in advertising or otherwise to promote the sale, use or other dealings -in this Software without prior written authorization from The Open Group. - - -Copyright 1993 by Digital Equipment Corporation, Maynard, Massachusetts. - - All Rights Reserved - -Permission to use, copy, modify, and distribute this software and its -documentation for any purpose and without fee is hereby granted, -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 Digital not be -used in advertising or publicity pertaining to distribution of the -software without specific, written prior permission. - -DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING -ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL -DIGITAL 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. - -******************************************************************/ - -/* -**++ -** FACILITY: -** -** Xlib -** -** ABSTRACT: -** -** Thai specific functions. -** Handles character classifications, composibility checking, -** Input sequence check and other Thai specific requirements -** according to WTT specification and DEC extensions. -** -** MODIFICATION HISTORY: -** -**/ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include <stdio.h> -#include <X11/Xlib.h> -#include <X11/Xmd.h> -#include <X11/keysym.h> -#include <X11/Xutil.h> -#include "Xlibint.h" -#include "Xlcint.h" -#include "Ximint.h" -#include "XimThai.h" -#include "XlcPubI.h" - - -#define SPACE 32 - -/* character classification table */ -#define TACTIS_CHARS 256 -Private -char const tactis_chtype[TACTIS_CHARS] = { - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 0 - 7 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 8 - 15 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 16 - 23 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 24 - 31 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 32 - 39 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 40 - 47 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 48 - 55 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 56 - 63 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 64 - 71 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 72 - 79 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 80 - 87 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 88 - 95 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 96 - 103 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 104 - 111 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 112 - 119 */ - NON, NON, NON, NON, NON, NON, NON, CTRL, /* 120 - 127 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 128 - 135 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 136 - 143 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 144 - 151 */ - CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 152 - 159 */ - NON, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 160 - 167 */ - CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 168 - 175 */ - CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 176 - 183 */ - CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 184 - 191 */ - CONS, CONS, CONS, CONS, FV3, CONS, FV3, CONS, /* 192 - 199 */ - CONS, CONS, CONS, CONS, CONS, CONS, CONS, NON, /* 200 - 207 */ - FV1, AV2, FV1, FV1, AV1, AV3, AV2, AV3, /* 208 - 215 */ - BV1, BV2, BD, NON, NON, NON, NON, NON, /* 216 - 223 */ - LV, LV, LV, LV, LV, FV2, NON, AD2, /* 224 - 231 */ - TONE, TONE, TONE, TONE, AD1, AD1, AD3, NON, /* 232 - 239 */ - NON, NON, NON, NON, NON, NON, NON, NON, /* 240 - 247 */ - NON, NON, NON, NON, NON, NON, NON, CTRL /* 248 - 255 */ -}; - -/* Composibility checking tables */ -#define NC 0 /* NOT COMPOSIBLE - following char displays in next cell */ -#define CP 1 /* COMPOSIBLE - following char is displayed in the same cell - as leading char, also implies ACCEPT */ -#define XC 3 /* Non-display */ -#define AC 4 /* ACCEPT - display the following char in the next cell */ -#define RJ 5 /* REJECT - discard that following char, ignore it */ - -#define CH_CLASSES 17 /* 17 classes of chars */ - -Private -char const write_rules_lookup[CH_CLASSES][CH_CLASSES] = { - /* Table 0: writing/outputing rules */ - /* row: leading char, column: following char */ -/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */ - {XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*CTRL*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*NON*/ - ,{XC, NC, NC, NC, NC, NC, NC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*LV*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV1*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV2*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV3*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, CP, NC, NC, NC, NC, NC}/*BV1*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, NC, NC, NC, NC, NC}/*BV2*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*BD*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*TONE*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD1*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD2*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD3*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, CP, NC, NC, NC, NC, NC}/*AV1*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, NC, NC, NC, NC, NC}/*AV2*/ - ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, CP, NC, NC, NC, NC}/*AV3*/ -}; - -Private -char const wtt_isc1_lookup[CH_CLASSES][CH_CLASSES] = { - /* Table 1: WTT default input sequence check rules */ - /* row: leading char, column: following char */ -/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */ - {XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/ - ,{XC, AC, AC, AC, AC, AC, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV3*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*TONE*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/ -}; - -Private -char const wtt_isc2_lookup[CH_CLASSES][CH_CLASSES] = { - /* Table 2: WTT strict input sequence check rules */ - /* row: leading char, column: following char */ -/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */ - {XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/ - ,{XC, AC, AC, AC, AC, RJ, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/ - ,{XC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/ - ,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/ - ,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/ - ,{XC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV3*/ - ,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*TONE*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD1*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD2*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/ - ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/ -}; - -Private -char const thaicat_isc_lookup[CH_CLASSES][CH_CLASSES] = { - /* Table 3: Thaicat input sequence check rules */ - /* row: leading char, column: following char */ -/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */ - {XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/ - ,{XC, AC, AC, AC, AC, AC, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ} /*FV3*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/ - ,{XC, AC, AC, AC, AC, AC, AC, CP, CP, RJ, RJ, RJ, RJ, RJ, CP, CP, CP}/*TONE*/ - ,{XC, AC, AC, AC, AC, AC, AC, CP, RJ, RJ, RJ, RJ, RJ, RJ, CP, RJ, RJ}/*AD1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, CP}/*AD2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/ - ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/ -}; - - -/* returns classification of a char */ -Private int -THAI_chtype (unsigned char ch) -{ - return tactis_chtype[ch]; -} - -#ifdef UNUSED -/* returns the display level */ -Private int -THAI_chlevel (unsigned char ch) -{ - int chlevel; - - switch (tactis_chtype[ch]) - { - case CTRL: - chlevel = NON; - break; - case BV1: - case BV2: - case BD: - chlevel = BELOW; - break; - case TONE: - case AD1: - case AD2: - chlevel = TOP; - break; - case AV1: - case AV2: - case AV3: - case AD3: - chlevel = ABOVE; - break; - case NON: - case CONS: - case LV: - case FV1: - case FV2: - case FV3: - default: /* if tactis_chtype is invalid */ - chlevel = BASE; - break; - } - return chlevel; -} - - -/* return True if char is non-spacing */ -Private Bool -THAI_isdead (unsigned char ch) -{ - return ((tactis_chtype[ch] == CTRL) || (tactis_chtype[ch] == BV1) || - (tactis_chtype[ch] == BV2) || (tactis_chtype[ch] == BD) || - (tactis_chtype[ch] == TONE) || (tactis_chtype[ch] == AD1) || - (tactis_chtype[ch] == AD2) || (tactis_chtype[ch] == AD3) || - (tactis_chtype[ch] == AV1) || (tactis_chtype[ch] == AV2) || - (tactis_chtype[ch] == AV3)); -} - - -/* return True if char is consonant */ -Private Bool -THAI_iscons (unsigned char ch) -{ - return (tactis_chtype[ch] == CONS); -} - - -/* return True if char is vowel */ -Private Bool -THAI_isvowel (unsigned char ch) -{ - return ((tactis_chtype[ch] == LV) || (tactis_chtype[ch] == FV1) || - (tactis_chtype[ch] == FV2) || (tactis_chtype[ch] == FV3) || - (tactis_chtype[ch] == BV1) || (tactis_chtype[ch] == BV2) || - (tactis_chtype[ch] == AV1) || (tactis_chtype[ch] == AV2) || - (tactis_chtype[ch] == AV3)); -} - - -/* return True if char is tonemark */ -Private Bool -THAI_istone (unsigned char ch) -{ - return (tactis_chtype[ch] == TONE); -} -#endif - -Private Bool -THAI_iscomposible ( - unsigned char follow_ch, - unsigned char lead_ch) -{/* "Can follow_ch be put in the same display cell as lead_ch?" */ - - return (write_rules_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] - == CP); -} - -Private Bool -THAI_isaccepted ( - unsigned char follow_ch, - unsigned char lead_ch, - unsigned char mode) -{ - Bool iskeyvalid; /* means "Can follow_ch be keyed in after lead_ch?" */ - - switch (mode) - { - case WTT_ISC1: - iskeyvalid = - (wtt_isc1_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] != RJ); - break; - case WTT_ISC2: - iskeyvalid = - (wtt_isc2_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] != RJ); - break; - case THAICAT_ISC: - iskeyvalid = - (thaicat_isc_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] != RJ); - break; - default: - iskeyvalid = True; - break; - } - - return iskeyvalid; -} - -#ifdef UNUSED -Private void -THAI_apply_write_rules( - unsigned char *instr, - unsigned char *outstr, - unsigned char insert_ch, - int *num_insert_ch) -{ -/* -Input parameters: - instr - input string - insert_ch specify what char to be added when invalid composition is found -Output parameters: - outstr - output string after input string has been applied the rules - num_insert_ch - number of insert_ch added to outstr. -*/ - unsigned char *lead_ch = NULL, *follow_ch = NULL, *out_ch = NULL; - - *num_insert_ch = 0; - lead_ch = follow_ch = instr; - out_ch = outstr; - if ((*lead_ch == '\0') || !(THAI_find_chtype(instr,DEAD))) - { /* Empty string or can't find any non-spacing char*/ - strcpy((char *)outstr, (char *)instr); - } else { /* String of length >= 1, keep looking */ - follow_ch++; - if (THAI_isdead(*lead_ch)) { /* is first char non-spacing? */ - *out_ch++ = SPACE; - (*num_insert_ch)++; - } - *out_ch++ = *lead_ch; - while (*follow_ch != '\0') /* more char in string to check */ - { - if (THAI_isdead(*follow_ch) && - !THAI_iscomposible(*follow_ch,*lead_ch)) - { - *out_ch++ = SPACE; - (*num_insert_ch)++; - } - *out_ch++ = *follow_ch; - lead_ch = follow_ch; - follow_ch++; - } - *out_ch = '\0'; - } -} - -Private int -THAI_find_chtype ( - unsigned char *instr, - int chtype) -{ -/* -Input parameters: - instr - input string - chtype - type of character to look for -Output parameters: - function returns first position of character with matched chtype - function returns -1 if it does not find. -*/ - int i = 0, position = -1; - - switch (chtype) - { - case DEAD: - for (i = 0; *instr != '\0' && THAI_isdead(*instr); i++, instr++) - ; - if (*instr != '\0') position = i; - break; - default: - break; - } - return position; -} - - -Private int -THAI_apply_scm( - unsigned char *instr, - unsigned char *outstr, - unsigned char spec_ch, - int num_sp, - unsigned char insert_ch) -{ - unsigned char *scan, *outch; - int i, dead_count, found_count; - Bool isconsecutive; - - scan = instr; - outch = outstr; - dead_count = found_count = 0; - isconsecutive = False; - while (*scan != '\0') { - if (THAI_isdead(*scan)) - dead_count++; /* count number of non-spacing char */ - if (*scan == spec_ch) - if (!isconsecutive) - found_count++; /* count number consecutive spec char found */ - *outch++ = *scan++; - if (found_count == num_sp) { - for (i = 0; i < dead_count; i++) - *outch++ = insert_ch; - dead_count = found_count = 0; - } - } - /* what to return? */ - return 0; /* probably not right but better than returning garbage */ -} - - -/* The following functions are copied from XKeyBind.c */ - -Private void ComputeMaskFromKeytrans(); -Private int IsCancelComposeKey(KeySym *symbol, XKeyEvent *event); -Private void SetLed(Display *dpy, int num, int state); -Private CARD8 FindKeyCode(); - - -/* The following functions are specific to this module */ - -Private int XThaiTranslateKey(); -Private int XThaiTranslateKeySym(); - - -Private KeySym HexIMNormalKey( - XicThaiPart *thai_part, - KeySym symbol, - XKeyEvent *event); -Private KeySym HexIMFirstComposeKey( - XicThaiPart *thai_part, - KeySym symbol, - XKeyEvent *event); -Private KeySym HexIMSecondComposeKey( - XicThaiPart *thai_part, - KeySym symbol - XKeyEvent *event); -Private KeySym HexIMComposeSequence(KeySym ks1, KeySym ks2); -Private void InitIscMode(Xic ic); -Private Bool ThaiComposeConvert( - Display *dpy, - KeySym insym, - KeySym *outsym, KeySym *lower, KeySym *upper); -#endif - -/* - * Definitions - */ - -#define BellVolume 0 - -#define ucs2tis(wc) \ - (unsigned char) ( \ - (0<=(wc)&&(wc)<=0x7F) ? \ - (wc) : \ - ((0x0E01<=(wc)&&(wc)<=0x0E5F) ? ((wc)-0x0E00+0xA0) : 0)) -/* "c" is an unsigned char */ -#define tis2ucs(c) \ - ( \ - ((c)<=0x7F) ? \ - (wchar_t)(c) : \ - ((0x0A1<=(c)) ? ((wchar_t)(c)-0xA0+0x0E00) : 0)) - -/* - * Macros to save and recall last input character in XIC - */ -#define IC_SavePreviousChar(ic,ch) \ - ((ic)->private.local.base.mb[(ic)->private.local.base.tree[(ic)->private.local.context].mb] = (char) (ch)) -#define IC_ClearPreviousChar(ic) \ - ((ic)->private.local.base.mb[(ic)->private.local.base.tree[(ic)->private.local.context].mb] = 0) -#define IC_GetPreviousChar(ic) \ - (IC_RealGetPreviousChar(ic,1)) -#define IC_GetContextChar(ic) \ - (IC_RealGetPreviousChar(ic,2)) -#define IC_DeletePreviousChar(ic) \ - (IC_RealDeletePreviousChar(ic)) - -Private unsigned char -IC_RealGetPreviousChar(Xic ic, unsigned short pos) -{ - XICCallback* cb = &ic->core.string_conversion_callback; - DefTreeBase *b = &ic->private.local.base; - - if (cb && cb->callback) { - XIMStringConversionCallbackStruct screc; - unsigned char c; - - /* Use a safe value of position = 0 and stretch the range to desired - * place, as XIM protocol is unclear here whether it could be negative - */ - screc.position = 0; - screc.direction = XIMBackwardChar; - screc.operation = XIMStringConversionRetrieval; - screc.factor = pos; - screc.text = 0; - - (cb->callback)((XIC)ic, cb->client_data, (XPointer)&screc); - if (!screc.text) - return (unsigned char) b->mb[b->tree[(ic)->private.local.context].mb]; - if ((screc.text->feedback && - *screc.text->feedback == XIMStringConversionLeftEdge) || - screc.text->length < 1) - { - c = 0; - } else { - Xim im; - XlcConv conv; - int from_left; - int to_left; - char *from_buf; - char *to_buf; - - im = (Xim) XIMOfIC((XIC)ic); - if (screc.text->encoding_is_wchar) { - conv = _XlcOpenConverter(im->core.lcd, XlcNWideChar, - im->core.lcd, XlcNCharSet); - from_buf = (char *) screc.text->string.wcs; - from_left = screc.text->length * sizeof(wchar_t); - } else { - conv = _XlcOpenConverter(im->core.lcd, XlcNMultiByte, - im->core.lcd, XlcNCharSet); - from_buf = screc.text->string.mbs; - from_left = screc.text->length; - } - to_buf = (char *)&c; - to_left = 1; - - _XlcResetConverter(conv); - if (_XlcConvert(conv, (XPointer *)&from_buf, &from_left, - (XPointer *)&to_buf, &to_left, NULL, 0) < 0) - { - c = (unsigned char) b->mb[b->tree[(ic)->private.local.context].mb]; - } - _XlcCloseConverter(conv); - - XFree(screc.text->string.mbs); - } - XFree(screc.text); - return c; - } else { - return (unsigned char) b->mb[b->tree[(ic)->private.local.context].mb]; - } -} - -Private unsigned char -IC_RealDeletePreviousChar(Xic ic) -{ - XICCallback* cb = &ic->core.string_conversion_callback; - - if (cb && cb->callback) { - XIMStringConversionCallbackStruct screc; - unsigned char c; - - screc.position = 0; - screc.direction = XIMBackwardChar; - screc.operation = XIMStringConversionSubstitution; - screc.factor = 1; - screc.text = 0; - - (cb->callback)((XIC)ic, cb->client_data, (XPointer)&screc); - if (!screc.text) { return 0; } - if ((screc.text->feedback && - *screc.text->feedback == XIMStringConversionLeftEdge) || - screc.text->length < 1) - { - c = 0; - } else { - if (screc.text->encoding_is_wchar) { - c = ucs2tis(screc.text->string.wcs[0]); - XFree(screc.text->string.wcs); - } else { - c = screc.text->string.mbs[0]; - XFree(screc.text->string.mbs); - } - } - XFree(screc.text); - return c; - } else { - return 0; - } -} -/* - * Input sequence check mode in XIC - */ -#define IC_IscMode(ic) ((ic)->private.local.thai.input_mode) - -/* - * Max. size of string handled by the two String Lookup functions. - */ -#define STR_LKUP_BUF_SIZE 256 - -/* - * Size of buffer to contain previous locale name. - */ -#define SAV_LOCALE_NAME_SIZE 256 - -/* - * Size of buffer to contain the IM modifier. - */ -#define MAXTHAIIMMODLEN 20 - -#define AllMods (ShiftMask|LockMask|ControlMask| \ - Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask) - - -#define IsISOControlKey(ks) ((ks) >= XK_2 && (ks) <= XK_8) - -#define IsValidControlKey(ks) (((((ks)>=XK_A && (ks)<=XK_asciitilde) || \ - (ks)==XK_space || (ks)==XK_Delete) && \ - ((ks)!=0))) - -#define COMPOSE_LED 2 - -#ifdef UNUSED -typedef KeySym (*StateProc)( - XicThaiPart *thai_part, - KeySym symbol, - XKeyEvent *event); - - -/* - * macros to classify XKeyEvent state field - */ - -#define IsShift(state) (((state) & ShiftMask) != 0) -#define IsLock(state) (((state) & LockMask) != 0) -#define IsControl(state) (((state) & ControlMask) != 0) -#define IsMod1(state) (((state) & Mod1Mask) != 0) -#define IsMod2(state) (((state) & Mod2Mask) != 0) -#define IsMod3(state) (((state) & Mod3Mask) != 0) -#define IsMod4(state) (((state) & Mod4Mask) != 0) -#define IsMod5(state) (((state) & Mod5Mask) != 0) - -/* - * key starts Thai compose sequence (Hex input method) if : - */ - -#define IsComposeKey(ks, event) \ - (( ks==XK_Alt_L && \ - IsControl((event)->state) && \ - !IsShift((event)->state)) \ - ? True : False) - - -/* - * State handler to implement the Thai hex input method. - */ - -Private int const nstate_handlers = 3; -Private StateProc state_handler[] = { - HexIMNormalKey, - HexIMFirstComposeKey, - HexIMSecondComposeKey -}; - - -/* - * Table for 'Thai Compose' character input. - * The current implementation uses latin-1 keysyms. - */ -struct _XMapThaiKey { - KeySym from; - KeySym to; -}; - -Private struct _XMapThaiKey const ThaiComposeTable[] = { - { /* 0xa4 */ XK_currency, /* 0xa5 */ XK_yen }, - { /* 0xa2 */ XK_cent, /* 0xa3 */ XK_sterling }, - { /* 0xe6 */ XK_ae, /* 0xef */ XK_idiaeresis }, - { /* 0xd3 */ XK_Oacute, /* 0xee */ XK_icircumflex }, - { /* 0xb9 */ XK_onesuperior, /* 0xfa */ XK_uacute }, - { /* 0xd2 */ XK_Ograve, /* 0xe5 */ XK_aring }, - { /* 0xbc */ XK_onequarter, /* 0xfb */ XK_ucircumflex }, - { XK_VoidSymbol, XK_VoidSymbol } -}; - -struct _XKeytrans { - struct _XKeytrans *next;/* next on list */ - char *string; /* string to return when the time comes */ - int len; /* length of string (since NULL is legit)*/ - KeySym key; /* keysym rebound */ - unsigned int state; /* modifier state */ - KeySym *modifiers; /* modifier keysyms you want */ - int mlen; /* length of modifier list */ -}; - - -/* Convert keysym to 'Thai Compose' keysym */ -/* The current implementation use latin-1 keysyms */ -Private Bool -ThaiComposeConvert( - Display *dpy, - KeySym insym, - KeySym *outsym, KeySym *lower, KeySym *upper) -{ - struct _XMapThaiKey const *table_entry = ThaiComposeTable; - - while (table_entry->from != XK_VoidSymbol) { - if (table_entry->from == insym) { - *outsym = table_entry->to; - *lower = *outsym; - *upper = *outsym; - return True; - } - table_entry++; - } - return False; -} - -Private int -XThaiTranslateKey( - register Display *dpy, - KeyCode keycode, - register unsigned int modifiers, - unsigned int *modifiers_return, - KeySym *keysym_return, - KeySym *lsym_return, - KeySym *usym_return) -{ - int per; - register KeySym *syms; - KeySym sym = 0, lsym = 0, usym = 0; - - if ((! dpy->keysyms) && (! _XKeyInitialize(dpy))) - return 0; - *modifiers_return = (ShiftMask|LockMask) | dpy->mode_switch; - if (((int)keycode < dpy->min_keycode) || ((int)keycode > dpy->max_keycode)) - { - *keysym_return = NoSymbol; - return 1; - } - per = dpy->keysyms_per_keycode; - syms = &dpy->keysyms[(keycode - dpy->min_keycode) * per]; - while ((per > 2) && (syms[per - 1] == NoSymbol)) - per--; - if ((per > 2) && (modifiers & dpy->mode_switch)) { - syms += 2; - per -= 2; - } - if (!(modifiers & ShiftMask) && - (!(modifiers & LockMask) || (dpy->lock_meaning == NoSymbol))) { - if ((per == 1) || (syms[1] == NoSymbol)) - XConvertCase(syms[0], keysym_return, &usym); - else { - XConvertCase(syms[0], &lsym, &usym); - *keysym_return = syms[0]; - } - } else if (!(modifiers & LockMask) || - (dpy->lock_meaning != XK_Caps_Lock)) { - if ((per == 1) || ((usym = syms[1]) == NoSymbol)) - XConvertCase(syms[0], &lsym, &usym); - *keysym_return = usym; - } else { - if ((per == 1) || ((sym = syms[1]) == NoSymbol)) - sym = syms[0]; - XConvertCase(sym, &lsym, &usym); - if (!(modifiers & ShiftMask) && (sym != syms[0]) && - ((sym != usym) || (lsym == usym))) - XConvertCase(syms[0], &lsym, &usym); - *keysym_return = usym; - } - /* - * ThaiCat keyboard support : - * When the Shift and Thai keys are hold for some keys a 'Thai Compose' - * character code is generated which is different from column 3 and - * 4 of the keymap. - * Since we don't know whether ThaiCat keyboard or WTT keyboard is - * in use, the same mapping is done for all Thai input. - * We just arbitary choose to use column 3 keysyms as the indices of - * this mapping. - * When the control key is also hold, this mapping has no effect. - */ - if ((modifiers & Mod1Mask) && - (modifiers & ShiftMask) && - !(modifiers & ControlMask)) { - if (ThaiComposeConvert(dpy, syms[0], &sym, &lsym, &usym)) - *keysym_return = sym; - } - - if (*keysym_return == XK_VoidSymbol) - *keysym_return = NoSymbol; - *lsym_return = lsym; - *usym_return = usym; - return 1; -} - -/* - * XThaiTranslateKeySym - * - * Translate KeySym to TACTIS code output. - * The current implementation uses ISO latin-1 keysym. - * Should be changed to TACTIS keysyms when they are defined by the - * standard. - */ -Private int -XThaiTranslateKeySym( - Display *dpy, - register KeySym symbol, - register KeySym lsym, - register KeySym usym, - unsigned int modifiers, - unsigned char *buffer, - int nbytes) -{ - KeySym ckey = 0; - register struct _XKeytrans *p; - int length; - unsigned long hiBytes; - register unsigned char c; - - /* - * initialize length = 1 ; - */ - length = 1; - - if (!symbol) - return 0; - /* see if symbol rebound, if so, return that string. */ - for (p = dpy->key_bindings; p; p = p->next) { - if (((modifiers & AllMods) == p->state) && (symbol == p->key)) { - length = p->len; - if (length > nbytes) length = nbytes; - memcpy (buffer, p->string, length); - return length; - } - } - /* try to convert to TACTIS, handling control */ - hiBytes = symbol >> 8; - if (!(nbytes && - ((hiBytes == 0) || - ((hiBytes == 0xFF) && - (((symbol >= XK_BackSpace) && (symbol <= XK_Clear)) || - (symbol == XK_Return) || - (symbol == XK_Escape) || - (symbol == XK_KP_Space) || - (symbol == XK_KP_Tab) || - (symbol == XK_KP_Enter) || - ((symbol >= XK_KP_Multiply) && (symbol <= XK_KP_9)) || - (symbol == XK_KP_Equal) || - (symbol == XK_Scroll_Lock) || -#ifdef DXK_PRIVATE /* DEC private keysyms */ - (symbol == DXK_Remove) || -#endif - (symbol == NoSymbol) || - (symbol == XK_Delete)))))) - return 0; - - /* if X keysym, convert to ascii by grabbing low 7 bits */ - if (symbol == XK_KP_Space) - c = XK_space & 0x7F; /* patch encoding botch */ -/* not for Thai - else if (symbol == XK_hyphen) - c = XK_minus & 0xFF; */ /* map to equiv character */ - else if (hiBytes == 0xFF) - c = symbol & 0x7F; - else - c = symbol & 0xFF; - /* only apply Control key if it makes sense, else ignore it */ - if (modifiers & ControlMask) { - if (!(IsKeypadKey(lsym) || lsym==XK_Return || lsym==XK_Tab)) { - if (IsISOControlKey(lsym)) ckey = lsym; - else if (IsISOControlKey(usym)) ckey = usym; - else if (lsym == XK_question) ckey = lsym; - else if (usym == XK_question) ckey = usym; - else if (IsValidControlKey(lsym)) ckey = lsym; - else if (IsValidControlKey(usym)) ckey = usym; - else length = 0; - - if (length != 0) { - if (ckey == XK_2) c = '\000'; - else if (ckey >= XK_3 && ckey <= XK_7) - c = (char)(ckey-('3'-'\033')); - else if (ckey == XK_8) c = '\177'; - else if (ckey == XK_Delete) c = '\030'; - else if (ckey == XK_question) c = '\037'; - else if (ckey == XK_quoteleft) c = '\036'; /* KLee 1/24/91 */ - else c = (char)(ckey & 0x1f); - } - } - } - /* - * ThaiCat has a key that generates two TACTIS codes D1 & E9. - * It is represented by the latin-1 keysym XK_thorn (0xfe). - * If c is XK_thorn, this key is pressed and it is converted to - * 0xd1 0xe9. - */ - if (c == XK_thorn) { - buffer[0] = 0xd1; - buffer[1] = 0xe9; - buffer[2] = '\0'; - return 2; - } - else { - /* Normal case */ - buffer[0] = c; - buffer[1] = '\0'; - return 1; - } -} - -/* - * given a KeySym, returns the first keycode containing it, if any. - */ -Private CARD8 -FindKeyCode( - register Display *dpy, - register KeySym code) -{ - - register KeySym *kmax = dpy->keysyms + - (dpy->max_keycode - dpy->min_keycode + 1) * dpy->keysyms_per_keycode; - register KeySym *k = dpy->keysyms; - while (k < kmax) { - if (*k == code) - return (((k - dpy->keysyms) / dpy->keysyms_per_keycode) + - dpy->min_keycode); - k += 1; - } - return 0; -} - -/* - * given a list of modifiers, computes the mask necessary for later matching. - * This routine must lookup the key in the Keymap and then search to see - * what modifier it is bound to, if any. Sets the AnyModifier bit if it - * can't map some keysym to a modifier. - */ -Private void -ComputeMaskFromKeytrans( - Display *dpy, - register struct _XKeytrans *p) -{ - register int i; - register CARD8 code; - register XModifierKeymap *m = dpy->modifiermap; - - p->state = AnyModifier; - for (i = 0; i < p->mlen; i++) { - /* if not found, then not on current keyboard */ - if ((code = FindKeyCode(dpy, p->modifiers[i])) == 0) - return; - /* code is now the keycode for the modifier you want */ - { - register int j = m->max_keypermod<<3; - - while ((--j >= 0) && (code != m->modifiermap[j])) - ; - if (j < 0) - return; - p->state |= (1<<(j/m->max_keypermod)); - } - } - p->state &= AllMods; -} - -/************************************************************************ - * - * - * Compose handling routines - compose handlers 0,1,2 - * - * - ************************************************************************/ - -#define NORMAL_KEY_STATE 0 -#define FIRST_COMPOSE_KEY_STATE 1 -#define SECOND_COMPOSE_KEY_STATE 2 - -Private -KeySym HexIMNormalKey( - XicThaiPart *thai_part, - KeySym symbol, - XKeyEvent *event) -{ - if (IsComposeKey (symbol, event)) /* start compose sequence */ - { - SetLed (event->display,COMPOSE_LED, LedModeOn); - thai_part->comp_state = FIRST_COMPOSE_KEY_STATE; - return NoSymbol; - } - return symbol; -} - - -Private -KeySym HexIMFirstComposeKey( - XicThaiPart *thai_part, - KeySym symbol, - XKeyEvent *event) -{ - if (IsModifierKey (symbol)) return symbol; /* ignore shift etc. */ - if (IsCancelComposeKey (&symbol, event)) /* cancel sequence */ - { - SetLed (event->display,COMPOSE_LED, LedModeOff); - thai_part->comp_state = NORMAL_KEY_STATE; - return symbol; - } - if (IsComposeKey (symbol, event)) /* restart sequence ?? */ - { - return NoSymbol; /* no state change necessary */ - } - - thai_part->keysym = symbol; /* save key pressed */ - thai_part->comp_state = SECOND_COMPOSE_KEY_STATE; - return NoSymbol; -} - -Private -KeySym HexIMSecondComposeKey( - XicThaiPart *thai_part, - KeySym symbol, - XKeyEvent *event) -{ - if (IsModifierKey (symbol)) return symbol; /* ignore shift etc. */ - if (IsComposeKey (symbol, event)) /* restart sequence ? */ - { - thai_part->comp_state =FIRST_COMPOSE_KEY_STATE; - return NoSymbol; - } - SetLed (event->display,COMPOSE_LED, LedModeOff); - if (IsCancelComposeKey (&symbol, event)) /* cancel sequence ? */ - { - thai_part->comp_state = NORMAL_KEY_STATE; - return symbol; - } - - if ((symbol = HexIMComposeSequence (thai_part->keysym, symbol)) - ==NoSymbol) - { /* invalid compose sequence */ - XBell(event->display, BellVolume); - } - thai_part->comp_state = NORMAL_KEY_STATE; /* reset to normal state */ - return symbol; -} - - -/* - * Interprets two keysyms entered as hex digits and return the Thai keysym - * correspond to the TACTIS code formed. - * The current implementation of this routine returns ISO Latin Keysyms. - */ - -Private -KeySym HexIMComposeSequence(KeySym ks1, KeySym ks2) -{ -int hi_digit; -int lo_digit; -int tactis_code; - - if ((ks1 >= XK_0) && (ks1 <= XK_9)) - hi_digit = ks1 - XK_0; - else if ((ks1 >= XK_A) && (ks1 <= XK_F)) - hi_digit = ks1 - XK_A + 10; - else if ((ks1 >= XK_a) && (ks1 <= XK_f)) - hi_digit = ks1 - XK_a + 10; - else /* out of range */ - return NoSymbol; - - if ((ks2 >= XK_0) && (ks2 <= XK_9)) - lo_digit = ks2 - XK_0; - else if ((ks2 >= XK_A) && (ks2 <= XK_F)) - lo_digit = ks2 - XK_A + 10; - else if ((ks2 >= XK_a) && (ks2 <= XK_f)) - lo_digit = ks2 - XK_a + 10; - else /* out of range */ - return NoSymbol; - - tactis_code = hi_digit * 0x10 + lo_digit ; - - return (KeySym)tactis_code; - -} - -/* - * routine determines - * 1) whether key event should cancel a compose sequence - * 2) whether cancelling key event should be processed or ignored - */ - -Private -int IsCancelComposeKey( - KeySym *symbol, - XKeyEvent *event) -{ - if (*symbol==XK_Delete && !IsControl(event->state) && - !IsMod1(event->state)) { - *symbol=NoSymbol; /* cancel compose sequence, and ignore key */ - return True; - } - if (IsComposeKey(*symbol, event)) return False; - return ( - IsControl (event->state) || - IsMod1(event->state) || - IsKeypadKey (*symbol) || - IsFunctionKey (*symbol) || - IsMiscFunctionKey (*symbol) || -#ifdef DXK_PRIVATE /* DEC private keysyms */ - *symbol == DXK_Remove || -#endif - IsPFKey (*symbol) || - IsCursorKey (*symbol) || - (*symbol >= XK_Tab && *symbol < XK_Multi_key) - ? True : False); /* cancel compose sequence and pass */ - /* cancelling key through */ -} - - -/* - * set specified keyboard LED on or off - */ - -Private -void SetLed( - Display *dpy, - int num, - int state) -{ - XKeyboardControl led_control; - - led_control.led_mode = state; - led_control.led = num; - XChangeKeyboardControl (dpy, KBLed | KBLedMode, &led_control); -} -#endif - -/* - * Initialize ISC mode from im modifier - */ -Private void InitIscMode(Xic ic) -{ - Xim im; - char *im_modifier_name; - - /* If already defined, just return */ - - if (IC_IscMode(ic)) return; - - /* Get IM modifier */ - - im = (Xim) XIMOfIC((XIC)ic); - im_modifier_name = im->core.im_name; - - /* Match with predefined value, default is Basic Check */ - - if (!strncmp(im_modifier_name,"BasicCheck",MAXTHAIIMMODLEN+1)) - IC_IscMode(ic) = WTT_ISC1; - else if (!strncmp(im_modifier_name,"Strict",MAXTHAIIMMODLEN+1)) - IC_IscMode(ic) = WTT_ISC2; - else if (!strncmp(im_modifier_name,"Thaicat",MAXTHAIIMMODLEN+1)) - IC_IscMode(ic) = THAICAT_ISC; - else if (!strncmp(im_modifier_name,"Passthrough",MAXTHAIIMMODLEN+1)) - IC_IscMode(ic) = NOISC; - else - IC_IscMode(ic) = WTT_ISC1; - - return; -} - -/* - * Helper functions for _XimThaiFilter() - */ -Private Bool -ThaiFltAcceptInput(Xic ic, unsigned char new_char, KeySym symbol) -{ - DefTreeBase *b = &ic->private.local.base; - b->wc[b->tree[ic->private.local.composed].wc+0] = tis2ucs(new_char); - b->wc[b->tree[ic->private.local.composed].wc+1] = '\0'; - - if ((new_char <= 0x1f) || (new_char == 0x7f)) - b->tree[ic->private.local.composed].keysym = symbol; - else - b->tree[ic->private.local.composed].keysym = NoSymbol; - - return True; -} - -Private Bool -ThaiFltReorderInput(Xic ic, unsigned char previous_char, unsigned char new_char) -{ - DefTreeBase *b = &ic->private.local.base; - if (!IC_DeletePreviousChar(ic)) return False; - b->wc[b->tree[ic->private.local.composed].wc+0] = tis2ucs(new_char); - b->wc[b->tree[ic->private.local.composed].wc+1] = tis2ucs(previous_char); - b->wc[b->tree[ic->private.local.composed].wc+2] = '\0'; - - b->tree[ic->private.local.composed].keysym = NoSymbol; - - return True; -} - -Private Bool -ThaiFltReplaceInput(Xic ic, unsigned char new_char, KeySym symbol) -{ - DefTreeBase *b = &ic->private.local.base; - if (!IC_DeletePreviousChar(ic)) return False; - b->wc[b->tree[ic->private.local.composed].wc+0] = tis2ucs(new_char); - b->wc[b->tree[ic->private.local.composed].wc+1] = '\0'; - - if ((new_char <= 0x1f) || (new_char == 0x7f)) - b->tree[ic->private.local.composed].keysym = symbol; - else - b->tree[ic->private.local.composed].keysym = NoSymbol; - - return True; -} - -Private unsigned -NumLockMask(Display *d) -{ - int i; - XModifierKeymap *map = XGetModifierMapping (d); - KeyCode numlock_keycode = XKeysymToKeycode (d, XK_Num_Lock); - if (numlock_keycode == NoSymbol) - return 0; - - for (i = 0; i < 8; i++) { - if (map->modifiermap[map->max_keypermod * i] == numlock_keycode) - return 1 << i; - } - return 0; -} - -/* - * Filter function for TACTIS - */ -Bool -_XimThaiFilter(Display *d, Window w, XEvent *ev, XPointer client_data) -{ - Xic ic = (Xic)client_data; - KeySym symbol; - int isc_mode; /* Thai Input Sequence Check mode */ - unsigned char previous_char; /* Last inputted Thai char */ - unsigned char new_char; -#ifdef UNUSED - unsigned int modifiers; - KeySym lsym,usym; - int state; - XicThaiPart *thai_part; - char buf[10]; -#endif - wchar_t wbuf[10]; - Bool isReject; - DefTreeBase *b = &ic->private.local.base; - - if ((ev->type != KeyPress) - || (ev->xkey.keycode == 0)) - return False; - - if (!IC_IscMode(ic)) InitIscMode(ic); - - XwcLookupString((XIC)ic, &ev->xkey, wbuf, sizeof(wbuf) / sizeof(wbuf[0]), - &symbol, NULL); - - if ((ev->xkey.state & (AllMods & ~(ShiftMask|LockMask|NumLockMask(d)))) || - ((symbol >> 8 == 0xFF) && - ((XK_BackSpace <= symbol && symbol <= XK_Clear) || - (symbol == XK_Return) || - (symbol == XK_Pause) || - (symbol == XK_Scroll_Lock) || - (symbol == XK_Sys_Req) || - (symbol == XK_Escape) || - (symbol == XK_Delete) || - IsCursorKey(symbol) || - IsKeypadKey(symbol) || - IsMiscFunctionKey(symbol) || - IsFunctionKey(symbol)))) - { - IC_ClearPreviousChar(ic); - return False; - } - if (((symbol >> 8 == 0xFF) && - IsModifierKey(symbol)) || -#ifdef XK_XKB_KEYS - ((symbol >> 8 == 0xFE) && - (XK_ISO_Lock <= symbol && symbol <= XK_ISO_Last_Group_Lock)) || -#endif - (symbol == NoSymbol)) - { - return False; - } -#ifdef UNUSED - if (! XThaiTranslateKey(ev->xkey.display, ev->xkey.keycode, ev->xkey.state, - &modifiers, &symbol, &lsym, &usym)) - return False; - - /* - * Hex input method processing - */ - - thai_part = &ic->private.local.thai; - state = thai_part->comp_state; - if (state >= 0 && state < nstate_handlers) /* call handler for state */ - { - symbol = (* state_handler[state])(thai_part, symbol, (XKeyEvent *)ev); - } - - /* - * Translate KeySym into mb. - */ - count = XThaiTranslateKeySym(ev->xkey.display, symbol, lsym, - usym, ev->xkey.state, buf, 10); - - if (!symbol && !count) - return True; - - /* Return symbol if cannot convert to character */ - if (!count) - return False; -#endif - - /* - * Thai Input sequence check - */ - isc_mode = IC_IscMode(ic); - if (!(previous_char = IC_GetPreviousChar(ic))) previous_char = ' '; - new_char = ucs2tis(wbuf[0]); - isReject = True; - if (THAI_isaccepted(new_char, previous_char, isc_mode)) { - ThaiFltAcceptInput(ic, new_char, symbol); - isReject = False; - } else { - unsigned char context_char; - - context_char = IC_GetContextChar(ic); - if (context_char) { - if (THAI_iscomposible(new_char, context_char)) { - if (THAI_iscomposible(previous_char, new_char)) { - isReject = !ThaiFltReorderInput(ic, previous_char, new_char); - } else if (THAI_iscomposible(previous_char, context_char)) { - isReject = !ThaiFltReplaceInput(ic, new_char, symbol); - } else if (THAI_chtype(previous_char) == FV1 - && THAI_chtype(new_char) == TONE) { - isReject = !ThaiFltReorderInput(ic, previous_char, new_char); - } - } else if (THAI_isaccepted(new_char, context_char, isc_mode)) { - isReject = !ThaiFltReplaceInput(ic, new_char, symbol); - } - } - } - if (isReject) { - /* reject character */ - XBell(ev->xkey.display, BellVolume); - return True; - } - - _Xlcwcstombs(ic->core.im->core.lcd, &b->mb[b->tree[ic->private.local.composed].mb], - &b->wc[b->tree[ic->private.local.composed].wc], 10); - - _Xlcmbstoutf8(ic->core.im->core.lcd, &b->utf8[b->tree[ic->private.local.composed].utf8], - &b->mb[b->tree[ic->private.local.composed].mb], 10); - - /* Remember the last character inputted - * (as fallback in case StringConversionCallback is not provided) - */ - IC_SavePreviousChar(ic, new_char); - - ev->xkey.keycode = 0; - XPutBackEvent(d, ev); - return True; -} +/***********************************************************
+
+Copyright 1993, 1998 The Open Group
+
+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.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1993 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+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 Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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.
+
+******************************************************************/
+
+/*
+**++
+** FACILITY:
+**
+** Xlib
+**
+** ABSTRACT:
+**
+** Thai specific functions.
+** Handles character classifications, composibility checking,
+** Input sequence check and other Thai specific requirements
+** according to WTT specification and DEC extensions.
+**
+** MODIFICATION HISTORY:
+**
+**/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <X11/Xlib.h>
+#include <X11/Xmd.h>
+#include <X11/keysym.h>
+#include <X11/Xutil.h>
+#include "Xlibint.h"
+#include "Xlcint.h"
+#include "Ximint.h"
+#include "XimThai.h"
+#include "XlcPubI.h"
+
+
+#define SPACE 32
+
+/* character classification table */
+#define TACTIS_CHARS 256
+Private
+char const tactis_chtype[TACTIS_CHARS] = {
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 0 - 7 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 8 - 15 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 16 - 23 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 24 - 31 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 32 - 39 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 40 - 47 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 48 - 55 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 56 - 63 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 64 - 71 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 72 - 79 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 80 - 87 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 88 - 95 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 96 - 103 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 104 - 111 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 112 - 119 */
+ NON, NON, NON, NON, NON, NON, NON, CTRL, /* 120 - 127 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 128 - 135 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 136 - 143 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 144 - 151 */
+ CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 152 - 159 */
+ NON, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 160 - 167 */
+ CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 168 - 175 */
+ CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 176 - 183 */
+ CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 184 - 191 */
+ CONS, CONS, CONS, CONS, FV3, CONS, FV3, CONS, /* 192 - 199 */
+ CONS, CONS, CONS, CONS, CONS, CONS, CONS, NON, /* 200 - 207 */
+ FV1, AV2, FV1, FV1, AV1, AV3, AV2, AV3, /* 208 - 215 */
+ BV1, BV2, BD, NON, NON, NON, NON, NON, /* 216 - 223 */
+ LV, LV, LV, LV, LV, FV2, NON, AD2, /* 224 - 231 */
+ TONE, TONE, TONE, TONE, AD1, AD1, AD3, NON, /* 232 - 239 */
+ NON, NON, NON, NON, NON, NON, NON, NON, /* 240 - 247 */
+ NON, NON, NON, NON, NON, NON, NON, CTRL /* 248 - 255 */
+};
+
+/* Composibility checking tables */
+#define NC 0 /* NOT COMPOSIBLE - following char displays in next cell */
+#define CP 1 /* COMPOSIBLE - following char is displayed in the same cell
+ as leading char, also implies ACCEPT */
+#define XC 3 /* Non-display */
+#define AC 4 /* ACCEPT - display the following char in the next cell */
+#define RJ 5 /* REJECT - discard that following char, ignore it */
+
+#define CH_CLASSES 17 /* 17 classes of chars */
+
+Private
+char const write_rules_lookup[CH_CLASSES][CH_CLASSES] = {
+ /* Table 0: writing/outputing rules */
+ /* row: leading char, column: following char */
+/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
+ {XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*CTRL*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*NON*/
+ ,{XC, NC, NC, NC, NC, NC, NC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*LV*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV1*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV2*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV3*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, CP, NC, NC, NC, NC, NC}/*BV1*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, NC, NC, NC, NC, NC}/*BV2*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*BD*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*TONE*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD1*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD2*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD3*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, CP, NC, NC, NC, NC, NC}/*AV1*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, NC, NC, NC, NC, NC}/*AV2*/
+ ,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, CP, NC, NC, NC, NC}/*AV3*/
+};
+
+Private
+char const wtt_isc1_lookup[CH_CLASSES][CH_CLASSES] = {
+ /* Table 1: WTT default input sequence check rules */
+ /* row: leading char, column: following char */
+/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
+ {XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/
+ ,{XC, AC, AC, AC, AC, AC, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV3*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*TONE*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/
+};
+
+Private
+char const wtt_isc2_lookup[CH_CLASSES][CH_CLASSES] = {
+ /* Table 2: WTT strict input sequence check rules */
+ /* row: leading char, column: following char */
+/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
+ {XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/
+ ,{XC, AC, AC, AC, AC, RJ, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
+ ,{XC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/
+ ,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/
+ ,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/
+ ,{XC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV3*/
+ ,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*TONE*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD1*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD2*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/
+ ,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/
+};
+
+Private
+char const thaicat_isc_lookup[CH_CLASSES][CH_CLASSES] = {
+ /* Table 3: Thaicat input sequence check rules */
+ /* row: leading char, column: following char */
+/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
+ {XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/
+ ,{XC, AC, AC, AC, AC, AC, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ} /*FV3*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/
+ ,{XC, AC, AC, AC, AC, AC, AC, CP, CP, RJ, RJ, RJ, RJ, RJ, CP, CP, CP}/*TONE*/
+ ,{XC, AC, AC, AC, AC, AC, AC, CP, RJ, RJ, RJ, RJ, RJ, RJ, CP, RJ, RJ}/*AD1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, CP}/*AD2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/
+ ,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/
+};
+
+
+/* returns classification of a char */
+Private int
+THAI_chtype (unsigned char ch)
+{
+ return tactis_chtype[ch];
+}
+
+#ifdef UNUSED
+/* returns the display level */
+Private int
+THAI_chlevel (unsigned char ch)
+{
+ int chlevel;
+
+ switch (tactis_chtype[ch])
+ {
+ case CTRL:
+ chlevel = NON;
+ break;
+ case BV1:
+ case BV2:
+ case BD:
+ chlevel = BELOW;
+ break;
+ case TONE:
+ case AD1:
+ case AD2:
+ chlevel = TOP;
+ break;
+ case AV1:
+ case AV2:
+ case AV3:
+ case AD3:
+ chlevel = ABOVE;
+ break;
+ case NON:
+ case CONS:
+ case LV:
+ case FV1:
+ case FV2:
+ case FV3:
+ default: /* if tactis_chtype is invalid */
+ chlevel = BASE;
+ break;
+ }
+ return chlevel;
+}
+
+
+/* return True if char is non-spacing */
+Private Bool
+THAI_isdead (unsigned char ch)
+{
+ return ((tactis_chtype[ch] == CTRL) || (tactis_chtype[ch] == BV1) ||
+ (tactis_chtype[ch] == BV2) || (tactis_chtype[ch] == BD) ||
+ (tactis_chtype[ch] == TONE) || (tactis_chtype[ch] == AD1) ||
+ (tactis_chtype[ch] == AD2) || (tactis_chtype[ch] == AD3) ||
+ (tactis_chtype[ch] == AV1) || (tactis_chtype[ch] == AV2) ||
+ (tactis_chtype[ch] == AV3));
+}
+
+
+/* return True if char is consonant */
+Private Bool
+THAI_iscons (unsigned char ch)
+{
+ return (tactis_chtype[ch] == CONS);
+}
+
+
+/* return True if char is vowel */
+Private Bool
+THAI_isvowel (unsigned char ch)
+{
+ return ((tactis_chtype[ch] == LV) || (tactis_chtype[ch] == FV1) ||
+ (tactis_chtype[ch] == FV2) || (tactis_chtype[ch] == FV3) ||
+ (tactis_chtype[ch] == BV1) || (tactis_chtype[ch] == BV2) ||
+ (tactis_chtype[ch] == AV1) || (tactis_chtype[ch] == AV2) ||
+ (tactis_chtype[ch] == AV3));
+}
+
+
+/* return True if char is tonemark */
+Private Bool
+THAI_istone (unsigned char ch)
+{
+ return (tactis_chtype[ch] == TONE);
+}
+#endif
+
+Private Bool
+THAI_iscomposible (
+ unsigned char follow_ch,
+ unsigned char lead_ch)
+{/* "Can follow_ch be put in the same display cell as lead_ch?" */
+
+ return (write_rules_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)]
+ == CP);
+}
+
+Private Bool
+THAI_isaccepted (
+ unsigned char follow_ch,
+ unsigned char lead_ch,
+ unsigned char mode)
+{
+ Bool iskeyvalid; /* means "Can follow_ch be keyed in after lead_ch?" */
+
+ switch (mode)
+ {
+ case WTT_ISC1:
+ iskeyvalid =
+ (wtt_isc1_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] != RJ);
+ break;
+ case WTT_ISC2:
+ iskeyvalid =
+ (wtt_isc2_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] != RJ);
+ break;
+ case THAICAT_ISC:
+ iskeyvalid =
+ (thaicat_isc_lookup[THAI_chtype(lead_ch)][THAI_chtype(follow_ch)] != RJ);
+ break;
+ default:
+ iskeyvalid = True;
+ break;
+ }
+
+ return iskeyvalid;
+}
+
+#ifdef UNUSED
+Private void
+THAI_apply_write_rules(
+ unsigned char *instr,
+ unsigned char *outstr,
+ unsigned char insert_ch,
+ int *num_insert_ch)
+{
+/*
+Input parameters:
+ instr - input string
+ insert_ch specify what char to be added when invalid composition is found
+Output parameters:
+ outstr - output string after input string has been applied the rules
+ num_insert_ch - number of insert_ch added to outstr.
+*/
+ unsigned char *lead_ch = NULL, *follow_ch = NULL, *out_ch = NULL;
+
+ *num_insert_ch = 0;
+ lead_ch = follow_ch = instr;
+ out_ch = outstr;
+ if ((*lead_ch == '\0') || !(THAI_find_chtype(instr,DEAD)))
+ { /* Empty string or can't find any non-spacing char*/
+ strcpy((char *)outstr, (char *)instr);
+ } else { /* String of length >= 1, keep looking */
+ follow_ch++;
+ if (THAI_isdead(*lead_ch)) { /* is first char non-spacing? */
+ *out_ch++ = SPACE;
+ (*num_insert_ch)++;
+ }
+ *out_ch++ = *lead_ch;
+ while (*follow_ch != '\0') /* more char in string to check */
+ {
+ if (THAI_isdead(*follow_ch) &&
+ !THAI_iscomposible(*follow_ch,*lead_ch))
+ {
+ *out_ch++ = SPACE;
+ (*num_insert_ch)++;
+ }
+ *out_ch++ = *follow_ch;
+ lead_ch = follow_ch;
+ follow_ch++;
+ }
+ *out_ch = '\0';
+ }
+}
+
+Private int
+THAI_find_chtype (
+ unsigned char *instr,
+ int chtype)
+{
+/*
+Input parameters:
+ instr - input string
+ chtype - type of character to look for
+Output parameters:
+ function returns first position of character with matched chtype
+ function returns -1 if it does not find.
+*/
+ int i = 0, position = -1;
+
+ switch (chtype)
+ {
+ case DEAD:
+ for (i = 0; *instr != '\0' && THAI_isdead(*instr); i++, instr++)
+ ;
+ if (*instr != '\0') position = i;
+ break;
+ default:
+ break;
+ }
+ return position;
+}
+
+
+Private int
+THAI_apply_scm(
+ unsigned char *instr,
+ unsigned char *outstr,
+ unsigned char spec_ch,
+ int num_sp,
+ unsigned char insert_ch)
+{
+ unsigned char *scan, *outch;
+ int i, dead_count, found_count;
+ Bool isconsecutive;
+
+ scan = instr;
+ outch = outstr;
+ dead_count = found_count = 0;
+ isconsecutive = False;
+ while (*scan != '\0') {
+ if (THAI_isdead(*scan))
+ dead_count++; /* count number of non-spacing char */
+ if (*scan == spec_ch)
+ if (!isconsecutive)
+ found_count++; /* count number consecutive spec char found */
+ *outch++ = *scan++;
+ if (found_count == num_sp) {
+ for (i = 0; i < dead_count; i++)
+ *outch++ = insert_ch;
+ dead_count = found_count = 0;
+ }
+ }
+ /* what to return? */
+ return 0; /* probably not right but better than returning garbage */
+}
+
+
+/* The following functions are copied from XKeyBind.c */
+
+Private void ComputeMaskFromKeytrans();
+Private int IsCancelComposeKey(KeySym *symbol, XKeyEvent *event);
+Private void SetLed(Display *dpy, int num, int state);
+Private CARD8 FindKeyCode();
+
+
+/* The following functions are specific to this module */
+
+Private int XThaiTranslateKey();
+Private int XThaiTranslateKeySym();
+
+
+Private KeySym HexIMNormalKey(
+ XicThaiPart *thai_part,
+ KeySym symbol,
+ XKeyEvent *event);
+Private KeySym HexIMFirstComposeKey(
+ XicThaiPart *thai_part,
+ KeySym symbol,
+ XKeyEvent *event);
+Private KeySym HexIMSecondComposeKey(
+ XicThaiPart *thai_part,
+ KeySym symbol
+ XKeyEvent *event);
+Private KeySym HexIMComposeSequence(KeySym ks1, KeySym ks2);
+Private void InitIscMode(Xic ic);
+Private Bool ThaiComposeConvert(
+ Display *dpy,
+ KeySym insym,
+ KeySym *outsym, KeySym *lower, KeySym *upper);
+#endif
+
+/*
+ * Definitions
+ */
+
+#define BellVolume 0
+
+#define ucs2tis(wc) \
+ (unsigned char) ( \
+ (0<=(wc)&&(wc)<=0x7F) ? \
+ (wc) : \
+ ((0x0E01<=(wc)&&(wc)<=0x0E5F) ? ((wc)-0x0E00+0xA0) : 0))
+/* "c" is an unsigned char */
+#define tis2ucs(c) \
+ ( \
+ ((c)<=0x7F) ? \
+ (wchar_t)(c) : \
+ ((0x0A1<=(c)) ? ((wchar_t)(c)-0xA0+0x0E00) : 0))
+
+/*
+ * Macros to save and recall last input character in XIC
+ */
+#define IC_SavePreviousChar(ic,ch) \
+ ((ic)->private.local.base.mb[(ic)->private.local.base.tree[(ic)->private.local.context].mb] = (char) (ch))
+#define IC_ClearPreviousChar(ic) \
+ ((ic)->private.local.base.mb[(ic)->private.local.base.tree[(ic)->private.local.context].mb] = 0)
+#define IC_GetPreviousChar(ic) \
+ (IC_RealGetPreviousChar(ic,1))
+#define IC_GetContextChar(ic) \
+ (IC_RealGetPreviousChar(ic,2))
+#define IC_DeletePreviousChar(ic) \
+ (IC_RealDeletePreviousChar(ic))
+
+Private unsigned char
+IC_RealGetPreviousChar(Xic ic, unsigned short pos)
+{
+ XICCallback* cb = &ic->core.string_conversion_callback;
+ DefTreeBase *b = &ic->private.local.base;
+
+ if (cb && cb->callback) {
+ XIMStringConversionCallbackStruct screc;
+ unsigned char c;
+
+ /* Use a safe value of position = 0 and stretch the range to desired
+ * place, as XIM protocol is unclear here whether it could be negative
+ */
+ screc.position = 0;
+ screc.direction = XIMBackwardChar;
+ screc.operation = XIMStringConversionRetrieval;
+ screc.factor = pos;
+ screc.text = 0;
+
+ (cb->callback)((XIC)ic, cb->client_data, (XPointer)&screc);
+ if (!screc.text)
+ return (unsigned char) b->mb[b->tree[(ic)->private.local.context].mb];
+ if ((screc.text->feedback &&
+ *screc.text->feedback == XIMStringConversionLeftEdge) ||
+ screc.text->length < 1)
+ {
+ c = 0;
+ } else {
+ Xim im;
+ XlcConv conv;
+ int from_left;
+ int to_left;
+ char *from_buf;
+ char *to_buf;
+
+ im = (Xim) XIMOfIC((XIC)ic);
+ if (screc.text->encoding_is_wchar) {
+ conv = _XlcOpenConverter(im->core.lcd, XlcNWideChar,
+ im->core.lcd, XlcNCharSet);
+ from_buf = (char *) screc.text->string.wcs;
+ from_left = screc.text->length * sizeof(wchar_t);
+ } else {
+ conv = _XlcOpenConverter(im->core.lcd, XlcNMultiByte,
+ im->core.lcd, XlcNCharSet);
+ from_buf = screc.text->string.mbs;
+ from_left = screc.text->length;
+ }
+ to_buf = (char *)&c;
+ to_left = 1;
+
+ _XlcResetConverter(conv);
+ if (_XlcConvert(conv, (XPointer *)&from_buf, &from_left,
+ (XPointer *)&to_buf, &to_left, NULL, 0) < 0)
+ {
+ c = (unsigned char) b->mb[b->tree[(ic)->private.local.context].mb];
+ }
+ _XlcCloseConverter(conv);
+
+ XFree(screc.text->string.mbs);
+ }
+ XFree(screc.text);
+ return c;
+ } else {
+ return (unsigned char) b->mb[b->tree[(ic)->private.local.context].mb];
+ }
+}
+
+Private unsigned char
+IC_RealDeletePreviousChar(Xic ic)
+{
+ XICCallback* cb = &ic->core.string_conversion_callback;
+
+ if (cb && cb->callback) {
+ XIMStringConversionCallbackStruct screc;
+ unsigned char c;
+
+ screc.position = 0;
+ screc.direction = XIMBackwardChar;
+ screc.operation = XIMStringConversionSubstitution;
+ screc.factor = 1;
+ screc.text = 0;
+
+ (cb->callback)((XIC)ic, cb->client_data, (XPointer)&screc);
+ if (!screc.text) { return 0; }
+ if ((screc.text->feedback &&
+ *screc.text->feedback == XIMStringConversionLeftEdge) ||
+ screc.text->length < 1)
+ {
+ c = 0;
+ } else {
+ if (screc.text->encoding_is_wchar) {
+ c = ucs2tis(screc.text->string.wcs[0]);
+ XFree(screc.text->string.wcs);
+ } else {
+ c = screc.text->string.mbs[0];
+ XFree(screc.text->string.mbs);
+ }
+ }
+ XFree(screc.text);
+ return c;
+ } else {
+ return 0;
+ }
+}
+/*
+ * Input sequence check mode in XIC
+ */
+#define IC_IscMode(ic) ((ic)->private.local.thai.input_mode)
+
+/*
+ * Max. size of string handled by the two String Lookup functions.
+ */
+#define STR_LKUP_BUF_SIZE 256
+
+/*
+ * Size of buffer to contain previous locale name.
+ */
+#define SAV_LOCALE_NAME_SIZE 256
+
+/*
+ * Size of buffer to contain the IM modifier.
+ */
+#define MAXTHAIIMMODLEN 20
+
+#define AllMods (ShiftMask|LockMask|ControlMask| \
+ Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask)
+
+
+#define IsISOControlKey(ks) ((ks) >= XK_2 && (ks) <= XK_8)
+
+#define IsValidControlKey(ks) (((((ks)>=XK_A && (ks)<=XK_asciitilde) || \
+ (ks)==XK_space || (ks)==XK_Delete) && \
+ ((ks)!=0)))
+
+#define COMPOSE_LED 2
+
+#ifdef UNUSED
+typedef KeySym (*StateProc)(
+ XicThaiPart *thai_part,
+ KeySym symbol,
+ XKeyEvent *event);
+
+
+/*
+ * macros to classify XKeyEvent state field
+ */
+
+#define IsShift(state) (((state) & ShiftMask) != 0)
+#define IsLock(state) (((state) & LockMask) != 0)
+#define IsControl(state) (((state) & ControlMask) != 0)
+#define IsMod1(state) (((state) & Mod1Mask) != 0)
+#define IsMod2(state) (((state) & Mod2Mask) != 0)
+#define IsMod3(state) (((state) & Mod3Mask) != 0)
+#define IsMod4(state) (((state) & Mod4Mask) != 0)
+#define IsMod5(state) (((state) & Mod5Mask) != 0)
+
+/*
+ * key starts Thai compose sequence (Hex input method) if :
+ */
+
+#define IsComposeKey(ks, event) \
+ (( ks==XK_Alt_L && \
+ IsControl((event)->state) && \
+ !IsShift((event)->state)) \
+ ? True : False)
+
+
+/*
+ * State handler to implement the Thai hex input method.
+ */
+
+Private int const nstate_handlers = 3;
+Private StateProc state_handler[] = {
+ HexIMNormalKey,
+ HexIMFirstComposeKey,
+ HexIMSecondComposeKey
+};
+
+
+/*
+ * Table for 'Thai Compose' character input.
+ * The current implementation uses latin-1 keysyms.
+ */
+struct _XMapThaiKey {
+ KeySym from;
+ KeySym to;
+};
+
+Private struct _XMapThaiKey const ThaiComposeTable[] = {
+ { /* 0xa4 */ XK_currency, /* 0xa5 */ XK_yen },
+ { /* 0xa2 */ XK_cent, /* 0xa3 */ XK_sterling },
+ { /* 0xe6 */ XK_ae, /* 0xef */ XK_idiaeresis },
+ { /* 0xd3 */ XK_Oacute, /* 0xee */ XK_icircumflex },
+ { /* 0xb9 */ XK_onesuperior, /* 0xfa */ XK_uacute },
+ { /* 0xd2 */ XK_Ograve, /* 0xe5 */ XK_aring },
+ { /* 0xbc */ XK_onequarter, /* 0xfb */ XK_ucircumflex },
+ { XK_VoidSymbol, XK_VoidSymbol }
+};
+
+struct _XKeytrans {
+ struct _XKeytrans *next;/* next on list */
+ char *string; /* string to return when the time comes */
+ int len; /* length of string (since NULL is legit)*/
+ KeySym key; /* keysym rebound */
+ unsigned int state; /* modifier state */
+ KeySym *modifiers; /* modifier keysyms you want */
+ int mlen; /* length of modifier list */
+};
+
+
+/* Convert keysym to 'Thai Compose' keysym */
+/* The current implementation use latin-1 keysyms */
+Private Bool
+ThaiComposeConvert(
+ Display *dpy,
+ KeySym insym,
+ KeySym *outsym, KeySym *lower, KeySym *upper)
+{
+ struct _XMapThaiKey const *table_entry = ThaiComposeTable;
+
+ while (table_entry->from != XK_VoidSymbol) {
+ if (table_entry->from == insym) {
+ *outsym = table_entry->to;
+ *lower = *outsym;
+ *upper = *outsym;
+ return True;
+ }
+ table_entry++;
+ }
+ return False;
+}
+
+Private int
+XThaiTranslateKey(
+ register Display *dpy,
+ KeyCode keycode,
+ register unsigned int modifiers,
+ unsigned int *modifiers_return,
+ KeySym *keysym_return,
+ KeySym *lsym_return,
+ KeySym *usym_return)
+{
+ int per;
+ register KeySym *syms;
+ KeySym sym = 0, lsym = 0, usym = 0;
+
+ if ((! dpy->keysyms) && (! _XKeyInitialize(dpy)))
+ return 0;
+ *modifiers_return = (ShiftMask|LockMask) | dpy->mode_switch;
+ if (((int)keycode < dpy->min_keycode) || ((int)keycode > dpy->max_keycode))
+ {
+ *keysym_return = NoSymbol;
+ return 1;
+ }
+ per = dpy->keysyms_per_keycode;
+ syms = &dpy->keysyms[(keycode - dpy->min_keycode) * per];
+ while ((per > 2) && (syms[per - 1] == NoSymbol))
+ per--;
+ if ((per > 2) && (modifiers & dpy->mode_switch)) {
+ syms += 2;
+ per -= 2;
+ }
+ if (!(modifiers & ShiftMask) &&
+ (!(modifiers & LockMask) || (dpy->lock_meaning == NoSymbol))) {
+ if ((per == 1) || (syms[1] == NoSymbol))
+ XConvertCase(syms[0], keysym_return, &usym);
+ else {
+ XConvertCase(syms[0], &lsym, &usym);
+ *keysym_return = syms[0];
+ }
+ } else if (!(modifiers & LockMask) ||
+ (dpy->lock_meaning != XK_Caps_Lock)) {
+ if ((per == 1) || ((usym = syms[1]) == NoSymbol))
+ XConvertCase(syms[0], &lsym, &usym);
+ *keysym_return = usym;
+ } else {
+ if ((per == 1) || ((sym = syms[1]) == NoSymbol))
+ sym = syms[0];
+ XConvertCase(sym, &lsym, &usym);
+ if (!(modifiers & ShiftMask) && (sym != syms[0]) &&
+ ((sym != usym) || (lsym == usym)))
+ XConvertCase(syms[0], &lsym, &usym);
+ *keysym_return = usym;
+ }
+ /*
+ * ThaiCat keyboard support :
+ * When the Shift and Thai keys are hold for some keys a 'Thai Compose'
+ * character code is generated which is different from column 3 and
+ * 4 of the keymap.
+ * Since we don't know whether ThaiCat keyboard or WTT keyboard is
+ * in use, the same mapping is done for all Thai input.
+ * We just arbitary choose to use column 3 keysyms as the indices of
+ * this mapping.
+ * When the control key is also hold, this mapping has no effect.
+ */
+ if ((modifiers & Mod1Mask) &&
+ (modifiers & ShiftMask) &&
+ !(modifiers & ControlMask)) {
+ if (ThaiComposeConvert(dpy, syms[0], &sym, &lsym, &usym))
+ *keysym_return = sym;
+ }
+
+ if (*keysym_return == XK_VoidSymbol)
+ *keysym_return = NoSymbol;
+ *lsym_return = lsym;
+ *usym_return = usym;
+ return 1;
+}
+
+/*
+ * XThaiTranslateKeySym
+ *
+ * Translate KeySym to TACTIS code output.
+ * The current implementation uses ISO latin-1 keysym.
+ * Should be changed to TACTIS keysyms when they are defined by the
+ * standard.
+ */
+Private int
+XThaiTranslateKeySym(
+ Display *dpy,
+ register KeySym symbol,
+ register KeySym lsym,
+ register KeySym usym,
+ unsigned int modifiers,
+ unsigned char *buffer,
+ int nbytes)
+{
+ KeySym ckey = 0;
+ register struct _XKeytrans *p;
+ int length;
+ unsigned long hiBytes;
+ register unsigned char c;
+
+ /*
+ * initialize length = 1 ;
+ */
+ length = 1;
+
+ if (!symbol)
+ return 0;
+ /* see if symbol rebound, if so, return that string. */
+ for (p = dpy->key_bindings; p; p = p->next) {
+ if (((modifiers & AllMods) == p->state) && (symbol == p->key)) {
+ length = p->len;
+ if (length > nbytes) length = nbytes;
+ memcpy (buffer, p->string, length);
+ return length;
+ }
+ }
+ /* try to convert to TACTIS, handling control */
+ hiBytes = symbol >> 8;
+ if (!(nbytes &&
+ ((hiBytes == 0) ||
+ ((hiBytes == 0xFF) &&
+ (((symbol >= XK_BackSpace) && (symbol <= XK_Clear)) ||
+ (symbol == XK_Return) ||
+ (symbol == XK_Escape) ||
+ (symbol == XK_KP_Space) ||
+ (symbol == XK_KP_Tab) ||
+ (symbol == XK_KP_Enter) ||
+ ((symbol >= XK_KP_Multiply) && (symbol <= XK_KP_9)) ||
+ (symbol == XK_KP_Equal) ||
+ (symbol == XK_Scroll_Lock) ||
+#ifdef DXK_PRIVATE /* DEC private keysyms */
+ (symbol == DXK_Remove) ||
+#endif
+ (symbol == NoSymbol) ||
+ (symbol == XK_Delete))))))
+ return 0;
+
+ /* if X keysym, convert to ascii by grabbing low 7 bits */
+ if (symbol == XK_KP_Space)
+ c = XK_space & 0x7F; /* patch encoding botch */
+/* not for Thai
+ else if (symbol == XK_hyphen)
+ c = XK_minus & 0xFF; */ /* map to equiv character */
+ else if (hiBytes == 0xFF)
+ c = symbol & 0x7F;
+ else
+ c = symbol & 0xFF;
+ /* only apply Control key if it makes sense, else ignore it */
+ if (modifiers & ControlMask) {
+ if (!(IsKeypadKey(lsym) || lsym==XK_Return || lsym==XK_Tab)) {
+ if (IsISOControlKey(lsym)) ckey = lsym;
+ else if (IsISOControlKey(usym)) ckey = usym;
+ else if (lsym == XK_question) ckey = lsym;
+ else if (usym == XK_question) ckey = usym;
+ else if (IsValidControlKey(lsym)) ckey = lsym;
+ else if (IsValidControlKey(usym)) ckey = usym;
+ else length = 0;
+
+ if (length != 0) {
+ if (ckey == XK_2) c = '\000';
+ else if (ckey >= XK_3 && ckey <= XK_7)
+ c = (char)(ckey-('3'-'\033'));
+ else if (ckey == XK_8) c = '\177';
+ else if (ckey == XK_Delete) c = '\030';
+ else if (ckey == XK_question) c = '\037';
+ else if (ckey == XK_quoteleft) c = '\036'; /* KLee 1/24/91 */
+ else c = (char)(ckey & 0x1f);
+ }
+ }
+ }
+ /*
+ * ThaiCat has a key that generates two TACTIS codes D1 & E9.
+ * It is represented by the latin-1 keysym XK_thorn (0xfe).
+ * If c is XK_thorn, this key is pressed and it is converted to
+ * 0xd1 0xe9.
+ */
+ if (c == XK_thorn) {
+ buffer[0] = 0xd1;
+ buffer[1] = 0xe9;
+ buffer[2] = '\0';
+ return 2;
+ }
+ else {
+ /* Normal case */
+ buffer[0] = c;
+ buffer[1] = '\0';
+ return 1;
+ }
+}
+
+/*
+ * given a KeySym, returns the first keycode containing it, if any.
+ */
+Private CARD8
+FindKeyCode(
+ register Display *dpy,
+ register KeySym code)
+{
+
+ register KeySym *kmax = dpy->keysyms +
+ (dpy->max_keycode - dpy->min_keycode + 1) * dpy->keysyms_per_keycode;
+ register KeySym *k = dpy->keysyms;
+ while (k < kmax) {
+ if (*k == code)
+ return (((k - dpy->keysyms) / dpy->keysyms_per_keycode) +
+ dpy->min_keycode);
+ k += 1;
+ }
+ return 0;
+}
+
+/*
+ * given a list of modifiers, computes the mask necessary for later matching.
+ * This routine must lookup the key in the Keymap and then search to see
+ * what modifier it is bound to, if any. Sets the AnyModifier bit if it
+ * can't map some keysym to a modifier.
+ */
+Private void
+ComputeMaskFromKeytrans(
+ Display *dpy,
+ register struct _XKeytrans *p)
+{
+ register int i;
+ register CARD8 code;
+ register XModifierKeymap *m = dpy->modifiermap;
+
+ p->state = AnyModifier;
+ for (i = 0; i < p->mlen; i++) {
+ /* if not found, then not on current keyboard */
+ if ((code = FindKeyCode(dpy, p->modifiers[i])) == 0)
+ return;
+ /* code is now the keycode for the modifier you want */
+ {
+ register int j = m->max_keypermod<<3;
+
+ while ((--j >= 0) && (code != m->modifiermap[j]))
+ ;
+ if (j < 0)
+ return;
+ p->state |= (1<<(j/m->max_keypermod));
+ }
+ }
+ p->state &= AllMods;
+}
+
+/************************************************************************
+ *
+ *
+ * Compose handling routines - compose handlers 0,1,2
+ *
+ *
+ ************************************************************************/
+
+#define NORMAL_KEY_STATE 0
+#define FIRST_COMPOSE_KEY_STATE 1
+#define SECOND_COMPOSE_KEY_STATE 2
+
+Private
+KeySym HexIMNormalKey(
+ XicThaiPart *thai_part,
+ KeySym symbol,
+ XKeyEvent *event)
+{
+ if (IsComposeKey (symbol, event)) /* start compose sequence */
+ {
+ SetLed (event->display,COMPOSE_LED, LedModeOn);
+ thai_part->comp_state = FIRST_COMPOSE_KEY_STATE;
+ return NoSymbol;
+ }
+ return symbol;
+}
+
+
+Private
+KeySym HexIMFirstComposeKey(
+ XicThaiPart *thai_part,
+ KeySym symbol,
+ XKeyEvent *event)
+{
+ if (IsModifierKey (symbol)) return symbol; /* ignore shift etc. */
+ if (IsCancelComposeKey (&symbol, event)) /* cancel sequence */
+ {
+ SetLed (event->display,COMPOSE_LED, LedModeOff);
+ thai_part->comp_state = NORMAL_KEY_STATE;
+ return symbol;
+ }
+ if (IsComposeKey (symbol, event)) /* restart sequence ?? */
+ {
+ return NoSymbol; /* no state change necessary */
+ }
+
+ thai_part->keysym = symbol; /* save key pressed */
+ thai_part->comp_state = SECOND_COMPOSE_KEY_STATE;
+ return NoSymbol;
+}
+
+Private
+KeySym HexIMSecondComposeKey(
+ XicThaiPart *thai_part,
+ KeySym symbol,
+ XKeyEvent *event)
+{
+ if (IsModifierKey (symbol)) return symbol; /* ignore shift etc. */
+ if (IsComposeKey (symbol, event)) /* restart sequence ? */
+ {
+ thai_part->comp_state =FIRST_COMPOSE_KEY_STATE;
+ return NoSymbol;
+ }
+ SetLed (event->display,COMPOSE_LED, LedModeOff);
+ if (IsCancelComposeKey (&symbol, event)) /* cancel sequence ? */
+ {
+ thai_part->comp_state = NORMAL_KEY_STATE;
+ return symbol;
+ }
+
+ if ((symbol = HexIMComposeSequence (thai_part->keysym, symbol))
+ ==NoSymbol)
+ { /* invalid compose sequence */
+ XBell(event->display, BellVolume);
+ }
+ thai_part->comp_state = NORMAL_KEY_STATE; /* reset to normal state */
+ return symbol;
+}
+
+
+/*
+ * Interprets two keysyms entered as hex digits and return the Thai keysym
+ * correspond to the TACTIS code formed.
+ * The current implementation of this routine returns ISO Latin Keysyms.
+ */
+
+Private
+KeySym HexIMComposeSequence(KeySym ks1, KeySym ks2)
+{
+int hi_digit;
+int lo_digit;
+int tactis_code;
+
+ if ((ks1 >= XK_0) && (ks1 <= XK_9))
+ hi_digit = ks1 - XK_0;
+ else if ((ks1 >= XK_A) && (ks1 <= XK_F))
+ hi_digit = ks1 - XK_A + 10;
+ else if ((ks1 >= XK_a) && (ks1 <= XK_f))
+ hi_digit = ks1 - XK_a + 10;
+ else /* out of range */
+ return NoSymbol;
+
+ if ((ks2 >= XK_0) && (ks2 <= XK_9))
+ lo_digit = ks2 - XK_0;
+ else if ((ks2 >= XK_A) && (ks2 <= XK_F))
+ lo_digit = ks2 - XK_A + 10;
+ else if ((ks2 >= XK_a) && (ks2 <= XK_f))
+ lo_digit = ks2 - XK_a + 10;
+ else /* out of range */
+ return NoSymbol;
+
+ tactis_code = hi_digit * 0x10 + lo_digit ;
+
+ return (KeySym)tactis_code;
+
+}
+
+/*
+ * routine determines
+ * 1) whether key event should cancel a compose sequence
+ * 2) whether cancelling key event should be processed or ignored
+ */
+
+Private
+int IsCancelComposeKey(
+ KeySym *symbol,
+ XKeyEvent *event)
+{
+ if (*symbol==XK_Delete && !IsControl(event->state) &&
+ !IsMod1(event->state)) {
+ *symbol=NoSymbol; /* cancel compose sequence, and ignore key */
+ return True;
+ }
+ if (IsComposeKey(*symbol, event)) return False;
+ return (
+ IsControl (event->state) ||
+ IsMod1(event->state) ||
+ IsKeypadKey (*symbol) ||
+ IsFunctionKey (*symbol) ||
+ IsMiscFunctionKey (*symbol) ||
+#ifdef DXK_PRIVATE /* DEC private keysyms */
+ *symbol == DXK_Remove ||
+#endif
+ IsPFKey (*symbol) ||
+ IsCursorKey (*symbol) ||
+ (*symbol >= XK_Tab && *symbol < XK_Multi_key)
+ ? True : False); /* cancel compose sequence and pass */
+ /* cancelling key through */
+}
+
+
+/*
+ * set specified keyboard LED on or off
+ */
+
+Private
+void SetLed(
+ Display *dpy,
+ int num,
+ int state)
+{
+ XKeyboardControl led_control;
+
+ led_control.led_mode = state;
+ led_control.led = num;
+ XChangeKeyboardControl (dpy, KBLed | KBLedMode, &led_control);
+}
+#endif
+
+/*
+ * Initialize ISC mode from im modifier
+ */
+Private void InitIscMode(Xic ic)
+{
+ Xim im;
+ char *im_modifier_name;
+
+ /* If already defined, just return */
+
+ if (IC_IscMode(ic)) return;
+
+ /* Get IM modifier */
+
+ im = (Xim) XIMOfIC((XIC)ic);
+ im_modifier_name = im->core.im_name;
+
+ /* Match with predefined value, default is Basic Check */
+
+ if (!strncmp(im_modifier_name,"BasicCheck",MAXTHAIIMMODLEN+1))
+ IC_IscMode(ic) = WTT_ISC1;
+ else if (!strncmp(im_modifier_name,"Strict",MAXTHAIIMMODLEN+1))
+ IC_IscMode(ic) = WTT_ISC2;
+ else if (!strncmp(im_modifier_name,"Thaicat",MAXTHAIIMMODLEN+1))
+ IC_IscMode(ic) = THAICAT_ISC;
+ else if (!strncmp(im_modifier_name,"Passthrough",MAXTHAIIMMODLEN+1))
+ IC_IscMode(ic) = NOISC;
+ else
+ IC_IscMode(ic) = WTT_ISC1;
+
+ return;
+}
+
+/*
+ * Helper functions for _XimThaiFilter()
+ */
+Private Bool
+ThaiFltAcceptInput(Xic ic, unsigned char new_char, KeySym symbol)
+{
+ DefTreeBase *b = &ic->private.local.base;
+ b->wc[b->tree[ic->private.local.composed].wc+0] = tis2ucs(new_char);
+ b->wc[b->tree[ic->private.local.composed].wc+1] = '\0';
+
+ if ((new_char <= 0x1f) || (new_char == 0x7f))
+ b->tree[ic->private.local.composed].keysym = symbol;
+ else
+ b->tree[ic->private.local.composed].keysym = NoSymbol;
+
+ return True;
+}
+
+Private Bool
+ThaiFltReorderInput(Xic ic, unsigned char previous_char, unsigned char new_char)
+{
+ DefTreeBase *b = &ic->private.local.base;
+ if (!IC_DeletePreviousChar(ic)) return False;
+ b->wc[b->tree[ic->private.local.composed].wc+0] = tis2ucs(new_char);
+ b->wc[b->tree[ic->private.local.composed].wc+1] = tis2ucs(previous_char);
+ b->wc[b->tree[ic->private.local.composed].wc+2] = '\0';
+
+ b->tree[ic->private.local.composed].keysym = NoSymbol;
+
+ return True;
+}
+
+Private Bool
+ThaiFltReplaceInput(Xic ic, unsigned char new_char, KeySym symbol)
+{
+ DefTreeBase *b = &ic->private.local.base;
+ if (!IC_DeletePreviousChar(ic)) return False;
+ b->wc[b->tree[ic->private.local.composed].wc+0] = tis2ucs(new_char);
+ b->wc[b->tree[ic->private.local.composed].wc+1] = '\0';
+
+ if ((new_char <= 0x1f) || (new_char == 0x7f))
+ b->tree[ic->private.local.composed].keysym = symbol;
+ else
+ b->tree[ic->private.local.composed].keysym = NoSymbol;
+
+ return True;
+}
+
+Private unsigned
+NumLockMask(Display *d)
+{
+ int i;
+ XModifierKeymap *map;
+ KeyCode numlock_keycode = XKeysymToKeycode (d, XK_Num_Lock);
+ if (numlock_keycode == NoSymbol)
+ return 0;
+
+ map = XGetModifierMapping (d);
+ if (!map)
+ return 0;
+
+ for (i = 0; i < 8; i++) {
+ if (map->modifiermap[map->max_keypermod * i] == numlock_keycode) {
+ XFreeModifiermap(map);
+ return 1 << i;
+ }
+ }
+ XFreeModifiermap(map);
+ return 0;
+}
+
+/*
+ * Filter function for TACTIS
+ */
+Bool
+_XimThaiFilter(Display *d, Window w, XEvent *ev, XPointer client_data)
+{
+ Xic ic = (Xic)client_data;
+ KeySym symbol;
+ int isc_mode; /* Thai Input Sequence Check mode */
+ unsigned char previous_char; /* Last inputted Thai char */
+ unsigned char new_char;
+#ifdef UNUSED
+ unsigned int modifiers;
+ KeySym lsym,usym;
+ int state;
+ XicThaiPart *thai_part;
+ char buf[10];
+#endif
+ wchar_t wbuf[10];
+ Bool isReject;
+ DefTreeBase *b = &ic->private.local.base;
+
+ if ((ev->type != KeyPress)
+ || (ev->xkey.keycode == 0))
+ return False;
+
+ if (!IC_IscMode(ic)) InitIscMode(ic);
+
+ XwcLookupString((XIC)ic, &ev->xkey, wbuf, sizeof(wbuf) / sizeof(wbuf[0]),
+ &symbol, NULL);
+
+ if ((ev->xkey.state & (AllMods & ~(ShiftMask|LockMask|NumLockMask(d)))) ||
+ ((symbol >> 8 == 0xFF) &&
+ ((XK_BackSpace <= symbol && symbol <= XK_Clear) ||
+ (symbol == XK_Return) ||
+ (symbol == XK_Pause) ||
+ (symbol == XK_Scroll_Lock) ||
+ (symbol == XK_Sys_Req) ||
+ (symbol == XK_Escape) ||
+ (symbol == XK_Delete) ||
+ IsCursorKey(symbol) ||
+ IsKeypadKey(symbol) ||
+ IsMiscFunctionKey(symbol) ||
+ IsFunctionKey(symbol))))
+ {
+ IC_ClearPreviousChar(ic);
+ return False;
+ }
+ if (((symbol >> 8 == 0xFF) &&
+ IsModifierKey(symbol)) ||
+#ifdef XK_XKB_KEYS
+ ((symbol >> 8 == 0xFE) &&
+ (XK_ISO_Lock <= symbol && symbol <= XK_ISO_Last_Group_Lock)) ||
+#endif
+ (symbol == NoSymbol))
+ {
+ return False;
+ }
+#ifdef UNUSED
+ if (! XThaiTranslateKey(ev->xkey.display, ev->xkey.keycode, ev->xkey.state,
+ &modifiers, &symbol, &lsym, &usym))
+ return False;
+
+ /*
+ * Hex input method processing
+ */
+
+ thai_part = &ic->private.local.thai;
+ state = thai_part->comp_state;
+ if (state >= 0 && state < nstate_handlers) /* call handler for state */
+ {
+ symbol = (* state_handler[state])(thai_part, symbol, (XKeyEvent *)ev);
+ }
+
+ /*
+ * Translate KeySym into mb.
+ */
+ count = XThaiTranslateKeySym(ev->xkey.display, symbol, lsym,
+ usym, ev->xkey.state, buf, 10);
+
+ if (!symbol && !count)
+ return True;
+
+ /* Return symbol if cannot convert to character */
+ if (!count)
+ return False;
+#endif
+
+ /*
+ * Thai Input sequence check
+ */
+ isc_mode = IC_IscMode(ic);
+ if (!(previous_char = IC_GetPreviousChar(ic))) previous_char = ' ';
+ new_char = ucs2tis(wbuf[0]);
+ isReject = True;
+ if (THAI_isaccepted(new_char, previous_char, isc_mode)) {
+ ThaiFltAcceptInput(ic, new_char, symbol);
+ isReject = False;
+ } else {
+ unsigned char context_char;
+
+ context_char = IC_GetContextChar(ic);
+ if (context_char) {
+ if (THAI_iscomposible(new_char, context_char)) {
+ if (THAI_iscomposible(previous_char, new_char)) {
+ isReject = !ThaiFltReorderInput(ic, previous_char, new_char);
+ } else if (THAI_iscomposible(previous_char, context_char)) {
+ isReject = !ThaiFltReplaceInput(ic, new_char, symbol);
+ } else if (THAI_chtype(previous_char) == FV1
+ && THAI_chtype(new_char) == TONE) {
+ isReject = !ThaiFltReorderInput(ic, previous_char, new_char);
+ }
+ } else if (THAI_isaccepted(new_char, context_char, isc_mode)) {
+ isReject = !ThaiFltReplaceInput(ic, new_char, symbol);
+ }
+ }
+ }
+ if (isReject) {
+ /* reject character */
+ XBell(ev->xkey.display, BellVolume);
+ return True;
+ }
+
+ _Xlcwcstombs(ic->core.im->core.lcd, &b->mb[b->tree[ic->private.local.composed].mb],
+ &b->wc[b->tree[ic->private.local.composed].wc], 10);
+
+ _Xlcmbstoutf8(ic->core.im->core.lcd, &b->utf8[b->tree[ic->private.local.composed].utf8],
+ &b->mb[b->tree[ic->private.local.composed].mb], 10);
+
+ /* Remember the last character inputted
+ * (as fallback in case StringConversionCallback is not provided)
+ */
+ IC_SavePreviousChar(ic, new_char);
+
+ ev->xkey.keycode = 0;
+ XPutBackEvent(d, ev);
+ return True;
+}
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