1 /****************************************************************** 2 3 Copyright 1992 by Fuji Xerox Co., Ltd. 4 Copyright 1992, 1994 by FUJITSU LIMITED 5 6 Permission to use, copy, modify, distribute, and sell this software 7 and its documentation for any purpose is hereby granted without fee, 8 provided that the above copyright notice appear in all copies and 9 that both that copyright notice and this permission notice appear 10 in supporting documentation, and that the name of Fuji Xerox, 11 FUJITSU LIMITED not be used in advertising or publicity pertaining 12 to distribution of the software without specific, written prior 13 permission. Fuji Xerox, FUJITSU LIMITED make no representations 14 about the suitability of this software for any purpose. 15 It is provided "as is" without express or implied warranty. 16 17 FUJI XEROX, FUJITSU LIMITED DISCLAIM ALL WARRANTIES WITH 18 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF 19 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL FUJI XEROX, 20 FUJITSU LIMITED BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL 21 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA 22 OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 24 PERFORMANCE OF THIS SOFTWARE. 25 26 Author : Kazunori Nishihara Fuji Xerox 27 Modifier : Takashi Fujiwara FUJITSU LIMITED 28 fujiwara (at) a80.tech.yk.fujitsu.co.jp 29 30 ******************************************************************/ 31 32 #ifdef HAVE_CONFIG_H 33 #include <config.h> 34 #endif 35 #include "Xlibint.h" 36 #include <X11/keysym.h> 37 #include "Xlcint.h" 38 #include "Ximint.h" 39 40 Bool 41 _XimLocalFilter(Display *d, Window w, XEvent *ev, XPointer client_data) 42 { 43 Xic ic = (Xic)client_data; 44 KeySym keysym; 45 static char buf[256]; 46 static unsigned prevcode = 0, prevstate = 0; 47 unsigned currstate; 48 DefTree *b = ic->private.local.base.tree; 49 DTIndex t; 50 Bool anymodifier = False; 51 unsigned char braillePattern = 0; 52 53 if(ev->xkey.keycode == 0) 54 return (False); 55 56 XLookupString((XKeyEvent *)ev, buf, sizeof(buf), &keysym, NULL); 57 58 if(keysym >= XK_braille_dot_1 && keysym <= XK_braille_dot_8) { 59 if(ev->type == KeyPress) { 60 ic->private.local.brl_pressed |= 61 1<<(keysym-XK_braille_dot_1); 62 return(True); 63 } else { 64 if(!ic->private.local.brl_committing 65 || ev->xkey.time - ic->private.local.brl_release_start > 300) { 66 ic->private.local.brl_committing = ic->private.local.brl_pressed; 67 ic->private.local.brl_release_start = ev->xkey.time; 68 } 69 ic->private.local.brl_pressed &= ~(1<<(keysym-XK_braille_dot_1)); 70 if(!ic->private.local.brl_pressed && ic->private.local.brl_committing) { 71 /* Committed a braille pattern, let it go through compose tree */ 72 keysym = XK_braille_blank | ic->private.local.brl_committing; 73 ev->type = KeyPress; 74 braillePattern = ic->private.local.brl_committing; 75 ic->private.local.brl_committing = 0; 76 } else { 77 return(True); 78 } 79 } 80 } 81 82 if(((Xim)ic->core.im)->private.local.top == 0 ) 83 goto emit_braille; 84 85 currstate = ev->xkey.state; 86 if(ev->type == KeyPress) { 87 prevcode = ev->xkey.keycode; 88 prevstate = currstate; 89 90 if(IsModifierKey(keysym)) 91 return(False); 92 prevcode = 0; 93 } else { 94 if(prevcode != ev->xkey.keycode) 95 return False; 96 97 /* For lookup, we use the state at the time when the key was pressed, */ 98 /* because this state was not affected by the modifier that is mapped */ 99 /* to the key. */ 100 ev->xkey.state = prevstate; 101 XLookupString((XKeyEvent *)ev, buf, sizeof(buf), &keysym, NULL); 102 } 103 104 for(t = ic->private.local.context; t; t = b[t].next) { 105 if(IsModifierKey(b[t].keysym)) 106 anymodifier = True; 107 if(((ev->xkey.state & b[t].modifier_mask) == b[t].modifier) && 108 (keysym == b[t].keysym)) 109 break; 110 } 111 112 /* Restore the state */ 113 ev->xkey.state = currstate; 114 115 if(t) { /* Matched */ 116 if(b[t].succession) { /* Intermediate */ 117 ic->private.local.context = b[t].succession; 118 return (ev->type == KeyPress); 119 } else { /* Terminate (reached to leaf) */ 120 ic->private.local.composed = t; 121 ic->private.local.brl_committed = 0; 122 /* return back to client KeyPressEvent keycode == 0 */ 123 ev->xkey.keycode = 0; 124 ev->xkey.type = KeyPress; 125 XPutBackEvent(d, ev); 126 if(prevcode){ 127 /* For modifier key releases, restore the event, as we do not */ 128 /* filter it. */ 129 ev->xkey.type = KeyRelease; 130 ev->xkey.keycode = prevcode; 131 } 132 /* initialize internal state for next key sequence */ 133 ic->private.local.context = ((Xim)ic->core.im)->private.local.top; 134 return (ev->type == KeyPress); 135 } 136 } else { /* Unmatched */ 137 /* Unmatched modifier key releases abort matching only in the case that */ 138 /* there was any modifier that would have matched */ 139 if((ic->private.local.context == ((Xim)ic->core.im)->private.local.top) || 140 (ev->type == KeyRelease && !anymodifier)) { 141 goto emit_braille; 142 } 143 /* Error (Sequence Unmatch occurred) */ 144 /* initialize internal state for next key sequence */ 145 ic->private.local.context = ((Xim)ic->core.im)->private.local.top; 146 return (ev->type == KeyPress); 147 } 148 149 emit_braille: 150 if(braillePattern) { 151 /* Braille pattern is not in compose tree, emit alone */ 152 ic->private.local.brl_committed = braillePattern; 153 ic->private.local.composed = 0; 154 ev->xkey.keycode = 0; 155 _XPutBackEvent(d, ev); 156 return(True); 157 } 158 return(False); 159 } 160
Indexes created Wed Aug 19 00:25:20 UTC 2026