/[rdesktop]/sourceforge.net/trunk/rdesktop/xkeymap.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Revision 216 - (show annotations)
Tue Oct 8 02:30:20 2002 UTC (21 years, 7 months ago) by matthewc
File MIME type: text/plain
File size: 14948 byte(s)
Also look for keymaps in keymaps/%s so that rdesktop can be run "in place"
without installation... I find this useful for testing and it might avoid
some user complaints as well.

1 /*
2 rdesktop: A Remote Desktop Protocol client.
3 User interface services - X keyboard mapping
4 Copyright (C) Matthew Chapman 1999-2002
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include <X11/Xlib.h>
22 #define XK_MISCELLANY
23 #include <X11/keysymdef.h>
24 #include <ctype.h>
25 #include <limits.h>
26 #include <time.h>
27 #include "rdesktop.h"
28 #include "scancodes.h"
29
30 #define KEYMAP_SIZE 4096
31 #define KEYMAP_MASK (KEYMAP_SIZE - 1)
32 #define KEYMAP_MAX_LINE_LENGTH 80
33
34 extern Display *display;
35 extern char keymapname[16];
36 extern int keylayout;
37 extern BOOL enable_compose;
38
39 static BOOL keymap_loaded;
40 static key_translation keymap[KEYMAP_SIZE];
41 static int min_keycode;
42 static uint16 remote_modifier_state = 0;
43
44 static void update_modifier_state(uint8 scancode, BOOL pressed);
45
46 static void
47 add_to_keymap(char *keyname, uint8 scancode, uint16 modifiers, char *mapname)
48 {
49 KeySym keysym;
50
51 keysym = XStringToKeysym(keyname);
52 if (keysym == NoSymbol)
53 {
54 error("Bad keysym %s in keymap %s\n", keyname, mapname);
55 return;
56 }
57
58 DEBUG_KBD(("Adding translation, keysym=0x%x, scancode=0x%x, "
59 "modifiers=0x%x\n", (unsigned int) keysym, scancode, modifiers));
60
61 keymap[keysym & KEYMAP_MASK].scancode = scancode;
62 keymap[keysym & KEYMAP_MASK].modifiers = modifiers;
63
64 return;
65 }
66
67
68 static BOOL
69 xkeymap_read(char *mapname)
70 {
71 FILE *fp;
72 char line[KEYMAP_MAX_LINE_LENGTH];
73 char path[PATH_MAX], inplace_path[PATH_MAX];
74 unsigned int line_num = 0;
75 unsigned int line_length = 0;
76 char *keyname, *p;
77 char *line_rest;
78 uint8 scancode;
79 uint16 modifiers;
80
81
82 strcpy(path, KEYMAP_PATH);
83 strncat(path, mapname, sizeof(path) - sizeof(KEYMAP_PATH));
84
85 fp = fopen(path, "r");
86 if (fp == NULL)
87 {
88 /* in case we are running from the source tree */
89 strcpy(inplace_path, "keymaps/");
90 strncat(inplace_path, mapname, sizeof(inplace_path) - sizeof("keymaps/"));
91
92 fp = fopen(inplace_path, "r");
93 if (fp == NULL)
94 {
95 error("Failed to open keymap %s\n", path);
96 return False;
97 }
98 }
99
100 /* FIXME: More tolerant on white space */
101 while (fgets(line, sizeof(line), fp) != NULL)
102 {
103 line_num++;
104
105 /* Replace the \n with \0 */
106 p = strchr(line, '\n');
107 if (p != NULL)
108 *p = 0;
109
110 line_length = strlen(line);
111
112 /* Completely empty line */
113 if (strspn(line, " \t\n\r\f\v") == line_length)
114 {
115 continue;
116 }
117
118 /* Include */
119 if (strncmp(line, "include ", 8) == 0)
120 {
121 if (!xkeymap_read(line + 8))
122 return False;
123 continue;
124 }
125
126 /* map */
127 if (strncmp(line, "map ", 4) == 0)
128 {
129 keylayout = strtol(line + 4, NULL, 16);
130 DEBUG_KBD(("Keylayout 0x%x\n", keylayout));
131 continue;
132 }
133
134 /* compose */
135 if (strncmp(line, "enable_compose", 15) == 0)
136 {
137 DEBUG_KBD(("Enabling compose handling\n"));
138 enable_compose = True;
139 continue;
140 }
141
142 /* Comment */
143 if (line[0] == '#')
144 {
145 continue;
146 }
147
148 /* Normal line */
149 keyname = line;
150 p = strchr(line, ' ');
151 if (p == NULL)
152 {
153 error("Bad line %d in keymap %s\n", line_num, mapname);
154 continue;
155 }
156 else
157 {
158 *p = 0;
159 }
160
161 /* scancode */
162 p++;
163 scancode = strtol(p, &line_rest, 16);
164
165 /* flags */
166 /* FIXME: Should allow case-insensitive flag names.
167 Fix by using lex+yacc... */
168 modifiers = 0;
169 if (strstr(line_rest, "altgr"))
170 {
171 MASK_ADD_BITS(modifiers, MapAltGrMask);
172 }
173
174 if (strstr(line_rest, "shift"))
175 {
176 MASK_ADD_BITS(modifiers, MapLeftShiftMask);
177 }
178
179 if (strstr(line_rest, "numlock"))
180 {
181 MASK_ADD_BITS(modifiers, MapNumLockMask);
182 }
183
184 if (strstr(line_rest, "localstate"))
185 {
186 MASK_ADD_BITS(modifiers, MapLocalStateMask);
187 }
188
189 if (strstr(line_rest, "inhibit"))
190 {
191 MASK_ADD_BITS(modifiers, MapInhibitMask);
192 }
193
194 add_to_keymap(keyname, scancode, modifiers, mapname);
195
196 if (strstr(line_rest, "addupper"))
197 {
198 /* Automatically add uppercase key, with same modifiers
199 plus shift */
200 for (p = keyname; *p; p++)
201 *p = toupper(*p);
202 MASK_ADD_BITS(modifiers, MapLeftShiftMask);
203 add_to_keymap(keyname, scancode, modifiers, mapname);
204 }
205 }
206
207 fclose(fp);
208 return True;
209 }
210
211
212 /* Before connecting and creating UI */
213 void
214 xkeymap_init(void)
215 {
216 unsigned int max_keycode;
217
218 if (strcmp(keymapname, "none"))
219 {
220 if (xkeymap_read(keymapname))
221 keymap_loaded = True;
222 }
223
224 XDisplayKeycodes(display, &min_keycode, (int *) &max_keycode);
225 }
226
227 /* Handles, for example, multi-scancode keypresses (which is not
228 possible via keymap-files) */
229 BOOL
230 handle_special_keys(uint32 keysym, unsigned int state, uint32 ev_time, BOOL pressed)
231 {
232 switch (keysym)
233 {
234 case XK_Break:
235 case XK_Pause:
236 if ((get_key_state(state, XK_Alt_L) || get_key_state(state, XK_Alt_R))
237 && (get_key_state(state, XK_Control_L) || get_key_state(state, XK_Control_R)))
238 {
239 /* Ctrl-Alt-Break: toggle full screen */
240 if (pressed)
241 xwin_toggle_fullscreen();
242
243 }
244 else if (keysym == XK_Break)
245 {
246 /* Send Break sequence E0 46 E0 C6 */
247 if (pressed)
248 {
249 rdp_send_scancode(ev_time, RDP_KEYPRESS,
250 (SCANCODE_EXTENDED | 0x46));
251 rdp_send_scancode(ev_time, RDP_KEYPRESS,
252 (SCANCODE_EXTENDED | 0xc6));
253 }
254 /* No break sequence */
255 }
256 else /* XK_Pause */
257 {
258 /* According to MS Keyboard Scan Code
259 Specification, pressing Pause should result
260 in E1 1D 45 E1 9D C5. I'm not exactly sure
261 of how this is supposed to be sent via
262 RDP. The code below seems to work, but with
263 the side effect that Left Ctrl stays
264 down. Therefore, we release it when Pause
265 is released. */
266 if (pressed)
267 {
268 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0xe1, 0);
269 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0x1d, 0);
270 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0x45, 0);
271 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0xe1, 0);
272 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0x9d, 0);
273 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYPRESS, 0xc5, 0);
274 }
275 else
276 {
277 /* Release Left Ctrl */
278 rdp_send_input(ev_time, RDP_INPUT_SCANCODE, RDP_KEYRELEASE, 0x1d,
279 0);
280 }
281 }
282 return True;
283
284 case XK_Meta_L: /* Windows keys */
285 case XK_Super_L:
286 case XK_Hyper_L:
287 case XK_Meta_R:
288 case XK_Super_R:
289 case XK_Hyper_R:
290 if (pressed)
291 {
292 rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_LCTRL);
293 rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_ESC);
294 }
295 else
296 {
297 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_ESC);
298 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LCTRL);
299 }
300 return True;
301 }
302 return False;
303 }
304
305
306 key_translation
307 xkeymap_translate_key(uint32 keysym, unsigned int keycode, unsigned int state)
308 {
309 key_translation tr = { 0, 0 };
310
311 tr = keymap[keysym & KEYMAP_MASK];
312
313 if (tr.modifiers & MapInhibitMask)
314 {
315 DEBUG_KBD(("Inhibiting key\n"));
316 tr.scancode = 0;
317 return tr;
318 }
319
320 if (tr.modifiers & MapLocalStateMask)
321 {
322 /* The modifiers to send for this key should be obtained
323 from the local state. Currently, only shift is implemented. */
324 if (state & ShiftMask)
325 {
326 tr.modifiers = MapLeftShiftMask;
327 }
328 }
329
330 if (tr.scancode != 0)
331 {
332 DEBUG_KBD(("Found key translation, scancode=0x%x, modifiers=0x%x\n",
333 tr.scancode, tr.modifiers));
334 return tr;
335 }
336
337 if (keymap_loaded)
338 error("No translation for (keysym 0x%lx, %s)\n", keysym, get_ksname(keysym));
339
340 /* not in keymap, try to interpret the raw scancode */
341 if ((keycode >= min_keycode) && (keycode <= 0x60))
342 {
343 tr.scancode = keycode - min_keycode;
344
345 /* The modifiers to send for this key should be
346 obtained from the local state. Currently, only
347 shift is implemented. */
348 if (state & ShiftMask)
349 {
350 tr.modifiers = MapLeftShiftMask;
351 }
352
353 DEBUG_KBD(("Sending guessed scancode 0x%x\n", tr.scancode));
354 }
355 else
356 {
357 DEBUG_KBD(("No good guess for keycode 0x%x found\n", keycode));
358 }
359
360 return tr;
361 }
362
363 uint16
364 xkeymap_translate_button(unsigned int button)
365 {
366 switch (button)
367 {
368 case Button1: /* left */
369 return MOUSE_FLAG_BUTTON1;
370 case Button2: /* middle */
371 return MOUSE_FLAG_BUTTON3;
372 case Button3: /* right */
373 return MOUSE_FLAG_BUTTON2;
374 case Button4: /* wheel up */
375 return MOUSE_FLAG_BUTTON4;
376 case Button5: /* wheel down */
377 return MOUSE_FLAG_BUTTON5;
378 }
379
380 return 0;
381 }
382
383 char *
384 get_ksname(uint32 keysym)
385 {
386 char *ksname = NULL;
387
388 if (keysym == NoSymbol)
389 ksname = "NoSymbol";
390 else if (!(ksname = XKeysymToString(keysym)))
391 ksname = "(no name)";
392
393 return ksname;
394 }
395
396
397 void
398 ensure_remote_modifiers(uint32 ev_time, key_translation tr)
399 {
400 /* If this key is a modifier, do nothing */
401 switch (tr.scancode)
402 {
403 case SCANCODE_CHAR_LSHIFT:
404 case SCANCODE_CHAR_RSHIFT:
405 case SCANCODE_CHAR_LCTRL:
406 case SCANCODE_CHAR_RCTRL:
407 case SCANCODE_CHAR_LALT:
408 case SCANCODE_CHAR_RALT:
409 case SCANCODE_CHAR_LWIN:
410 case SCANCODE_CHAR_RWIN:
411 case SCANCODE_CHAR_NUMLOCK:
412 return;
413 default:
414 break;
415 }
416
417 /* Shift. Left shift and right shift are treated as equal; either is fine. */
418 if (MASK_HAS_BITS(tr.modifiers, MapShiftMask)
419 != MASK_HAS_BITS(remote_modifier_state, MapShiftMask))
420 {
421 /* The remote modifier state is not correct */
422 if (MASK_HAS_BITS(tr.modifiers, MapLeftShiftMask))
423 {
424 /* Needs left shift. Send down. */
425 rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_LSHIFT);
426 }
427 else if (MASK_HAS_BITS(tr.modifiers, MapRightShiftMask))
428 {
429 /* Needs right shift. Send down. */
430 rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_RSHIFT);
431 }
432 else
433 {
434 /* Should not use this modifier. Send up for shift currently pressed. */
435 if (MASK_HAS_BITS(remote_modifier_state, MapLeftShiftMask))
436 /* Left shift is down */
437 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LSHIFT);
438 else
439 /* Right shift is down */
440 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_RSHIFT);
441 }
442 }
443
444 /* AltGr */
445 if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask)
446 != MASK_HAS_BITS(remote_modifier_state, MapAltGrMask))
447 {
448 /* The remote modifier state is not correct */
449 if (MASK_HAS_BITS(tr.modifiers, MapAltGrMask))
450 {
451 /* Needs this modifier. Send down. */
452 rdp_send_scancode(ev_time, RDP_KEYPRESS, SCANCODE_CHAR_RALT);
453 }
454 else
455 {
456 /* Should not use this modifier. Send up. */
457 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_RALT);
458 }
459 }
460
461 /* NumLock */
462 if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask)
463 != MASK_HAS_BITS(remote_modifier_state, MapNumLockMask))
464 {
465 /* The remote modifier state is not correct */
466 uint16 new_remote_state = 0;
467
468 if (MASK_HAS_BITS(tr.modifiers, MapNumLockMask))
469 {
470 DEBUG_KBD(("Remote NumLock state is incorrect, activating NumLock.\n"));
471 new_remote_state |= KBD_FLAG_NUMLOCK;
472 }
473 else
474 {
475 DEBUG_KBD(("Remote NumLock state is incorrect, deactivating NumLock.\n"));
476 }
477
478 rdp_send_input(0, RDP_INPUT_SYNCHRONIZE, 0, new_remote_state, 0);
479 update_modifier_state(SCANCODE_CHAR_NUMLOCK, True);
480 }
481 }
482
483
484 void
485 reset_modifier_keys(unsigned int state)
486 {
487 /* reset keys */
488 uint32 ev_time;
489 ev_time = time(NULL);
490
491 if (MASK_HAS_BITS(remote_modifier_state, MapLeftShiftMask) && !get_key_state(state, XK_Shift_L))
492 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LSHIFT);
493
494 if (MASK_HAS_BITS(remote_modifier_state, MapRightShiftMask) && !get_key_state(state, XK_Shift_R))
495 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_RSHIFT);
496
497 if (MASK_HAS_BITS(remote_modifier_state, MapLeftCtrlMask) && !get_key_state(state, XK_Control_L))
498 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LCTRL);
499
500 if (MASK_HAS_BITS(remote_modifier_state, MapRightCtrlMask) && !get_key_state(state, XK_Control_R))
501 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_RCTRL);
502
503 if (MASK_HAS_BITS(remote_modifier_state, MapLeftAltMask) && !get_key_state(state, XK_Alt_L))
504 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_LALT);
505
506 if (MASK_HAS_BITS(remote_modifier_state, MapRightAltMask) &&
507 !get_key_state(state, XK_Alt_R) && !get_key_state(state, XK_Mode_switch))
508 rdp_send_scancode(ev_time, RDP_KEYRELEASE, SCANCODE_CHAR_RALT);
509 }
510
511
512 static void
513 update_modifier_state(uint8 scancode, BOOL pressed)
514 {
515 #ifdef WITH_DEBUG_KBD
516 uint16 old_modifier_state;
517
518 old_modifier_state = remote_modifier_state;
519 #endif
520
521 switch (scancode)
522 {
523 case SCANCODE_CHAR_LSHIFT:
524 MASK_CHANGE_BIT(remote_modifier_state, MapLeftShiftMask, pressed);
525 break;
526 case SCANCODE_CHAR_RSHIFT:
527 MASK_CHANGE_BIT(remote_modifier_state, MapRightShiftMask, pressed);
528 break;
529 case SCANCODE_CHAR_LCTRL:
530 MASK_CHANGE_BIT(remote_modifier_state, MapLeftCtrlMask, pressed);
531 break;
532 case SCANCODE_CHAR_RCTRL:
533 MASK_CHANGE_BIT(remote_modifier_state, MapRightCtrlMask, pressed);
534 break;
535 case SCANCODE_CHAR_LALT:
536 MASK_CHANGE_BIT(remote_modifier_state, MapLeftAltMask, pressed);
537 break;
538 case SCANCODE_CHAR_RALT:
539 MASK_CHANGE_BIT(remote_modifier_state, MapRightAltMask, pressed);
540 break;
541 case SCANCODE_CHAR_LWIN:
542 MASK_CHANGE_BIT(remote_modifier_state, MapLeftWinMask, pressed);
543 break;
544 case SCANCODE_CHAR_RWIN:
545 MASK_CHANGE_BIT(remote_modifier_state, MapRightWinMask, pressed);
546 break;
547 case SCANCODE_CHAR_NUMLOCK:
548 /* KeyReleases for NumLocks are sent immediately. Toggle the
549 modifier state only on Keypress */
550 if (pressed)
551 {
552 BOOL newNumLockState;
553 newNumLockState =
554 (MASK_HAS_BITS
555 (remote_modifier_state, MapNumLockMask) == False);
556 MASK_CHANGE_BIT(remote_modifier_state,
557 MapNumLockMask, newNumLockState);
558 }
559 break;
560 }
561
562 #ifdef WITH_DEBUG_KBD
563 if (old_modifier_state != remote_modifier_state)
564 {
565 DEBUG_KBD(("Before updating modifier_state:0x%x, pressed=0x%x\n",
566 old_modifier_state, pressed));
567 DEBUG_KBD(("After updating modifier_state:0x%x\n", remote_modifier_state));
568 }
569 #endif
570
571 }
572
573 /* Send keyboard input */
574 void
575 rdp_send_scancode(uint32 time, uint16 flags, uint8 scancode)
576 {
577 update_modifier_state(scancode, !(flags & RDP_KEYRELEASE));
578
579 if (scancode & SCANCODE_EXTENDED)
580 {
581 DEBUG_KBD(("Sending extended scancode=0x%x, flags=0x%x\n",
582 scancode & ~SCANCODE_EXTENDED, flags));
583 rdp_send_input(time, RDP_INPUT_SCANCODE, flags | KBD_FLAG_EXT,
584 scancode & ~SCANCODE_EXTENDED, 0);
585 }
586 else
587 {
588 DEBUG_KBD(("Sending scancode=0x%x, flags=0x%x\n", scancode, flags));
589 rdp_send_input(time, RDP_INPUT_SCANCODE, flags, scancode, 0);
590 }
591 }

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