1377 lines
43 KiB
C
1377 lines
43 KiB
C
/* $Xorg: imThaiFlt.c,v 1.5 2001/02/09 02:03:39 xorgcvs Exp $ */
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/***********************************************************
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Copyright 1993, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1993 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* $XFree86: xc/lib/X11/imThaiFlt.c,v 3.22tsi Exp $ */
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/*
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**++
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** FACILITY:
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**
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** Xlib
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**
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** ABSTRACT:
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**
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** Thai specific functions.
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** Handles character classifications, composibility checking,
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** Input sequence check and other Thai specific requirements
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** according to WTT specification and DEC extensions.
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**
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** MODIFICATION HISTORY:
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**
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**/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include <X11/Xmd.h>
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#include <X11/keysym.h>
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#include <X11/Xutil.h>
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#include "Xlibint.h"
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#include "Xlcint.h"
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#include "Ximint.h"
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#include "XimThai.h"
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#include "XlcPubI.h"
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#define SPACE 32
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/* character classification table */
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#define TACTIS_CHARS 256
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Private
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char const tactis_chtype[TACTIS_CHARS] = {
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 0 - 7 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 8 - 15 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 16 - 23 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 24 - 31 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 32 - 39 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 40 - 47 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 48 - 55 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 56 - 63 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 64 - 71 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 72 - 79 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 80 - 87 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 88 - 95 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 96 - 103 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 104 - 111 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 112 - 119 */
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NON, NON, NON, NON, NON, NON, NON, CTRL, /* 120 - 127 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 128 - 135 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 136 - 143 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 144 - 151 */
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CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, CTRL, /* 152 - 159 */
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NON, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 160 - 167 */
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CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 168 - 175 */
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CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 176 - 183 */
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CONS, CONS, CONS, CONS, CONS, CONS, CONS, CONS, /* 184 - 191 */
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CONS, CONS, CONS, CONS, FV3, CONS, FV3, CONS, /* 192 - 199 */
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CONS, CONS, CONS, CONS, CONS, CONS, CONS, NON, /* 200 - 207 */
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FV1, AV2, FV1, FV1, AV1, AV3, AV2, AV3, /* 208 - 215 */
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BV1, BV2, BD, NON, NON, NON, NON, NON, /* 216 - 223 */
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LV, LV, LV, LV, LV, FV2, NON, AD2, /* 224 - 231 */
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TONE, TONE, TONE, TONE, AD1, AD1, AD3, NON, /* 232 - 239 */
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NON, NON, NON, NON, NON, NON, NON, NON, /* 240 - 247 */
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NON, NON, NON, NON, NON, NON, NON, CTRL /* 248 - 255 */
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};
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/* Composibility checking tables */
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#define NC 0 /* NOT COMPOSIBLE - following char displays in next cell */
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#define CP 1 /* COMPOSIBLE - following char is displayed in the same cell
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as leading char, also implies ACCEPT */
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#define XC 3 /* Non-display */
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#define AC 4 /* ACCEPT - display the following char in the next cell */
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#define RJ 5 /* REJECT - discard that following char, ignore it */
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#define CH_CLASSES 17 /* 17 classes of chars */
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Private
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char const write_rules_lookup[CH_CLASSES][CH_CLASSES] = {
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/* Table 0: writing/outputing rules */
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/* row: leading char, column: following char */
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/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
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{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*CTRL*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*NON*/
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,{XC, NC, NC, NC, NC, NC, NC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*LV*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV1*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV2*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*FV3*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, CP, NC, NC, NC, NC, NC}/*BV1*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, NC, NC, NC, NC, NC}/*BV2*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*BD*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*TONE*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD1*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD2*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC, NC}/*AD3*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, CP, NC, NC, NC, NC, NC}/*AV1*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, NC, NC, NC, NC, NC}/*AV2*/
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,{XC, NC, NC, NC, NC, NC, NC, NC, NC, NC, CP, NC, CP, NC, NC, NC, NC}/*AV3*/
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};
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Private
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char const wtt_isc1_lookup[CH_CLASSES][CH_CLASSES] = {
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/* Table 1: WTT default input sequence check rules */
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/* row: leading char, column: following char */
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/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
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{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/
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,{XC, AC, AC, AC, AC, AC, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV3*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*TONE*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/
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};
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Private
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char const wtt_isc2_lookup[CH_CLASSES][CH_CLASSES] = {
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/* Table 2: WTT strict input sequence check rules */
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/* row: leading char, column: following char */
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/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
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{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/
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,{XC, AC, AC, AC, AC, RJ, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
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,{XC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/
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,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/
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,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/
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,{XC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV3*/
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,{XC, AC, AC, AC, AC, RJ, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*TONE*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD1*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD2*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/
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,{XC, AC, AC, AC, RJ, RJ, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/
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};
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Private
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char const thaicat_isc_lookup[CH_CLASSES][CH_CLASSES] = {
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/* Table 3: Thaicat input sequence check rules */
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/* row: leading char, column: following char */
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/* CTRL NON CONS LV FV1 FV2 FV3 BV1 BV2 BD TONE AD1 AD2 AD3 AV1 AV2 AV3 */
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{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*CTRL*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*NON*/
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,{XC, AC, AC, AC, AC, AC, AC, CP, CP, CP, CP, CP, CP, CP, CP, CP, CP}/*CONS*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*LV*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*FV2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ} /*FV3*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*BV1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*BV2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*BD*/
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,{XC, AC, AC, AC, AC, AC, AC, CP, CP, RJ, RJ, RJ, RJ, RJ, CP, CP, CP}/*TONE*/
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,{XC, AC, AC, AC, AC, AC, AC, CP, RJ, RJ, RJ, RJ, RJ, RJ, CP, RJ, RJ}/*AD1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, CP}/*AD2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ, RJ}/*AD3*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, CP, RJ, RJ, RJ, RJ, RJ}/*AV1*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, RJ, RJ, RJ, RJ, RJ}/*AV2*/
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,{XC, AC, AC, AC, AC, AC, AC, RJ, RJ, RJ, CP, RJ, CP, RJ, RJ, RJ, RJ}/*AV3*/
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};
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/* returns classification of a char */
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Private int
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THAI_chtype (unsigned char ch)
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{
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return tactis_chtype[ch];
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}
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#ifdef UNUSED
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/* returns the display level */
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Private int
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THAI_chlevel (unsigned char ch)
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{
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int chlevel;
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switch (tactis_chtype[ch])
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{
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case CTRL:
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chlevel = NON;
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break;
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case BV1:
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case BV2:
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case BD:
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chlevel = BELOW;
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break;
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case TONE:
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case AD1:
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case AD2:
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chlevel = TOP;
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break;
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case AV1:
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case AV2:
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case AV3:
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case AD3:
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chlevel = ABOVE;
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break;
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case NON:
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case CONS:
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case LV:
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case FV1:
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case FV2:
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case FV3:
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default: /* if tactis_chtype is invalid */
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chlevel = BASE;
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break;
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}
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return chlevel;
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}
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/* return True if char is non-spacing */
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Private Bool
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THAI_isdead (unsigned char ch)
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{
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return ((tactis_chtype[ch] == CTRL) || (tactis_chtype[ch] == BV1) ||
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(tactis_chtype[ch] == BV2) || (tactis_chtype[ch] == BD) ||
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(tactis_chtype[ch] == TONE) || (tactis_chtype[ch] == AD1) ||
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(tactis_chtype[ch] == AD2) || (tactis_chtype[ch] == AD3) ||
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(tactis_chtype[ch] == AV1) || (tactis_chtype[ch] == AV2) ||
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(tactis_chtype[ch] == AV3));
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}
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/* return True if char is consonant */
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Private Bool
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THAI_iscons (unsigned char ch)
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{
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return (tactis_chtype[ch] == CONS);
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}
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/* return True if char is vowel */
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Private Bool
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THAI_isvowel (unsigned char ch)
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{
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return ((tactis_chtype[ch] == LV) || (tactis_chtype[ch] == FV1) ||
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(tactis_chtype[ch] == FV2) || (tactis_chtype[ch] == FV3) ||
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(tactis_chtype[ch] == BV1) || (tactis_chtype[ch] == BV2) ||
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(tactis_chtype[ch] == AV1) || (tactis_chtype[ch] == AV2) ||
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(tactis_chtype[ch] == AV3));
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}
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/* return True if char is tonemark */
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Private Bool
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THAI_istone (unsigned char ch)
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{
|
|
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 {
|
|
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 (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;
|
|
}
|
|
|
|
/*
|
|
* 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)) ||
|
|
((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;
|
|
}
|