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1 | /* xscreensaver, Copyright (c) 2012-2020 Jamie Zawinski <jwz@jwz.org> |
2 | * | |
3 | * Permission to use, copy, modify, distribute, and sell this software and its | |
4 | * documentation for any purpose is hereby granted without fee, provided that | |
5 | * the above copyright notice appear in all copies and that both that | |
6 | * copyright notice and this permission notice appear in supporting | |
7 | * documentation. No representations are made about the suitability of this | |
8 | * software for any purpose. It is provided "as is" without express or | |
9 | * implied warranty. | |
10 | * | |
11 | * Running programs under a pipe or pty and returning bytes from them. | |
12 | * Uses these X resources: | |
13 | * | |
14 | * program: What to run. Usually "xscreensaver-text". | |
15 | * relaunchDelay: secs How long after the command dies before restarting. | |
16 | * usePty: bool Whether to run the command interactively. | |
17 | * metaSendsESC: bool Whether to send Alt-x as ESC x in pty-mode. | |
18 | * swapBSDEL: bool Swap Backspace and Delete in pty-mode. | |
19 | * | |
20 | * On iOS and Android, textclient-mobile.c is used instead. | |
21 | */ | |
22 | ||
23 | #include "utils.h" | |
24 | ||
25 | #if !defined(HAVE_IPHONE) && !defined(HAVE_ANDROID) /* whole file */ | |
26 | ||
27 | #include "textclient.h" | |
28 | #include "resources.h" | |
29 | ||
30 | #ifndef HAVE_COCOA | |
31 | # define XK_MISCELLANY | |
32 | # include <X11/keysymdef.h> | |
33 | # include <X11/Xatom.h> | |
34 | # include <X11/Intrinsic.h> | |
35 | #endif | |
36 | ||
37 | #include <stdio.h> | |
38 | ||
39 | #include <signal.h> | |
40 | #include <sys/wait.h> | |
41 | ||
42 | #ifdef HAVE_UNISTD_H | |
43 | # include <unistd.h> | |
44 | # include <fcntl.h> /* for O_RDWR */ | |
45 | #endif | |
46 | ||
47 | #ifdef HAVE_FORKPTY | |
48 | # include <sys/ioctl.h> | |
49 | # ifdef HAVE_PTY_H | |
50 | # include <pty.h> | |
51 | # endif | |
52 | # ifdef HAVE_UTIL_H | |
53 | # include <util.h> | |
54 | # endif | |
55 | # ifdef HAVE_SYS_TERMIOS_H | |
56 | # include <sys/termios.h> | |
57 | # endif | |
58 | #endif /* HAVE_FORKPTY */ | |
59 | ||
60 | #undef DEBUG | |
61 | ||
62 | extern const char *progname; | |
63 | ||
64 | struct text_data { | |
65 | Display *dpy; | |
66 | char *program; | |
67 | int pix_w, pix_h, char_w, char_h; | |
68 | int max_lines; | |
69 | ||
70 | Bool pty_p; | |
71 | XtIntervalId pipe_timer; | |
72 | FILE *pipe; | |
73 | pid_t pid; | |
74 | XtInputId pipe_id; | |
75 | Bool input_available_p; | |
76 | Time subproc_relaunch_delay; | |
77 | XComposeStatus compose; | |
78 | ||
79 | Bool meta_sends_esc_p; | |
80 | Bool swap_bs_del_p; | |
81 | Bool meta_done_once; | |
82 | unsigned int meta_mask; | |
83 | ||
84 | const char *out_buffer; | |
85 | int out_column; | |
86 | }; | |
87 | ||
88 | ||
89 | static void | |
90 | subproc_cb (XtPointer closure, int *source, XtInputId *id) | |
91 | { | |
92 | text_data *d = (text_data *) closure; | |
93 | # ifdef DEBUG | |
94 | if (! d->input_available_p) | |
95 | fprintf (stderr, "%s: textclient: input available\n", progname); | |
96 | # endif | |
97 | d->input_available_p = True; | |
98 | } | |
99 | ||
100 | ||
101 | # define BACKSLASH(c) \ | |
102 | (! ((c >= 'a' && c <= 'z') || \ | |
103 | (c >= 'A' && c <= 'Z') || \ | |
104 | (c >= '0' && c <= '9') || \ | |
105 | c == '.' || c == '_' || c == '-' || c == '+' || c == '/')) | |
106 | ||
107 | #ifdef HAVE_COCOA | |
108 | static char * | |
109 | escape_str (char *s, const char *src) | |
110 | { | |
111 | while (*src) { | |
112 | char c = *src++; | |
113 | if (BACKSLASH(c)) *s++ = '\\'; | |
114 | *s++ = c; | |
115 | } | |
116 | return s; | |
117 | } | |
118 | #endif | |
119 | ||
120 | ||
121 | /* Let's see if we're able to fork and exec at all. Thanks, macOS. | |
122 | */ | |
123 | static Bool | |
124 | selftest (void) | |
125 | { | |
126 | static Bool done = False; | |
127 | pid_t pid; | |
128 | char buf [255]; | |
129 | if (done) return True; | |
130 | ||
131 | pid = fork (); | |
132 | switch ((int) pid) | |
133 | { | |
134 | case -1: | |
135 | sprintf (buf, "%s: textclient: selftest: couldn't fork", progname); | |
136 | perror (buf); | |
137 | return False; | |
138 | ||
139 | case 0: /* child */ | |
140 | { | |
141 | char * const av[] = { "/bin/sh", "-c", "true", 0 }; | |
142 | execvp (av[0], av); | |
143 | exit (1); /* exits child fork */ | |
144 | break; | |
145 | } | |
146 | ||
147 | default: /* parent */ | |
148 | { | |
149 | int status = -1; | |
150 | int i; | |
151 | /* Busy-loops are bad mmmmkayyyy */ | |
152 | struct timeval tv; | |
153 | tv.tv_sec = 0; | |
154 | tv.tv_usec = 100000L; /* 0.1 sec */ | |
155 | for (i = 0; i < 50; i++) { /* 5 sec max */ | |
156 | pid_t pid2 = waitpid (pid, &status, 0); | |
157 | if (pid == pid2) break; | |
158 | (void) select (0, 0, 0, 0, &tv); | |
159 | } | |
160 | ||
161 | if (status != 0) | |
162 | { | |
163 | # ifdef DEBUG | |
164 | fprintf (stderr, "%s: selftest: textclient: status %d\n", | |
165 | progname, status); | |
166 | # endif | |
167 | return False; | |
168 | } | |
169 | else | |
170 | { | |
171 | # ifdef DEBUG | |
172 | fprintf (stderr, "%s: textclient: selftest ok\n", progname); | |
173 | # endif | |
174 | done = True; | |
175 | } | |
176 | break; | |
177 | } | |
178 | } | |
179 | ||
180 | return True; | |
181 | } | |
182 | ||
183 | ||
184 | static void start_timer (text_data *d); | |
185 | ||
186 | static void | |
187 | launch_text_generator (text_data *d) | |
188 | { | |
189 | XtAppContext app = XtDisplayToApplicationContext (d->dpy); | |
190 | char buf[255]; | |
191 | const char *oprogram = d->program; | |
192 | char *s; | |
193 | ||
194 | size_t oprogram_size = strlen(oprogram); | |
195 | size_t len; | |
196 | ||
197 | # ifdef HAVE_COCOA | |
198 | /* /bin/sh on OS X 10.10 wipes out the PATH. */ | |
199 | const char *path = getenv("PATH"); | |
200 | size_t cmd_capacity = (oprogram_size + strlen(path)) * 2 + 100; | |
201 | char *cmd = s = malloc (cmd_capacity); | |
202 | strcpy (s, "export PATH="); | |
203 | s += strlen (s); | |
204 | s = escape_str (s, path); | |
205 | strcpy (s, "; "); | |
206 | s += strlen (s); | |
207 | # else | |
208 | char *cmd = s = malloc ((strlen(oprogram)) * 2 + 100); | |
209 | # endif | |
210 | ||
211 | if (!selftest()) | |
212 | { | |
213 | if (!d->out_buffer || !*d->out_buffer) | |
214 | d->out_buffer = "Can't exec; Gatekeeper problem?\r\n\r\n"; | |
215 | start_timer (d); | |
216 | return; | |
217 | } | |
218 | ||
219 | strcpy (s, "( "); | |
220 | strcat (s, oprogram); | |
221 | s += strlen (s); | |
222 | ||
223 | /* Kludge! Special-case "xscreensaver-text" to tell it how wide | |
224 | the screen is. We used to do this by just always feeding | |
225 | `program' through sprintf() and setting the default value to | |
226 | "xscreensaver-text --cols %d", but that makes things blow up | |
227 | if someone ever uses a --program that includes a % anywhere. | |
228 | */ | |
229 | len = 17; /* strlen("xscreensaver-text") */ | |
230 | if (oprogram_size >= len && | |
231 | !memcmp (oprogram, "xscreensaver-text", len) && | |
232 | (oprogram[len] == ' ' || !oprogram[len])) | |
233 | { | |
234 | /* strstr is sloppy here. Technically, we should be parsing the command | |
235 | line to identify flags and their arguments. This will blow up if one | |
236 | of those pesky end users could set .textLiteral to "--cols". | |
237 | */ | |
238 | if (d->char_w && !strstr (oprogram, "--cols ")) | |
239 | sprintf (s, " --cols %d", d->char_w); | |
240 | if (d->max_lines && !strstr (oprogram, "--lines ")) | |
241 | sprintf (s, " --lines %d", d->max_lines); | |
242 | s += strlen(s); | |
243 | ||
244 | # ifdef HAVE_COCOA | |
245 | /* Also special-case "xscreensaver-text" to specify the text content on | |
246 | the command line. defaults(1) on macOS doesn't know about the default | |
247 | screenhack resources that don't make it into the | |
248 | ~/Library/Preferences/ByHost/org.jwz.xscreensaver.*.plist. | |
249 | */ | |
250 | ||
251 | char *text_mode_flag = " --date"; | |
252 | char *value_res = NULL; | |
253 | char *text_mode = get_string_resource (d->dpy, "textMode", "String"); | |
254 | ||
255 | if (text_mode) | |
256 | { | |
257 | if (!strcmp (text_mode, "1") || !strcmp (text_mode, "literal")) | |
258 | { | |
259 | text_mode_flag = " --text"; | |
260 | value_res = "textLiteral"; | |
261 | } | |
262 | else if (!strcmp (text_mode, "2") || !strcmp (text_mode, "file")) | |
263 | { | |
264 | text_mode_flag = " --file"; | |
265 | value_res = "textFile"; | |
266 | } | |
267 | else if (!strcmp (text_mode, "3") || !strcmp (text_mode, "url")) | |
268 | { | |
269 | text_mode_flag = " --url"; | |
270 | value_res = "textURL"; | |
271 | } | |
272 | else if (!strcmp (text_mode, "4") || !strcmp (text_mode, "program")) | |
273 | { | |
274 | text_mode_flag = " --program"; | |
275 | value_res = "textProgram"; | |
276 | } | |
277 | ||
278 | free (text_mode); | |
279 | } | |
280 | ||
281 | strcpy (s, text_mode_flag); | |
282 | s += strlen (s); | |
283 | ||
284 | if (value_res) | |
285 | { | |
286 | size_t old_s = s - cmd; | |
287 | char *value = get_string_resource (d->dpy, value_res, ""); | |
288 | if (!value) | |
289 | value = strdup(""); | |
290 | cmd = realloc(cmd, cmd_capacity + strlen(value) * 2); | |
291 | s = cmd + old_s; | |
292 | *s = ' '; | |
293 | ++s; | |
294 | s = escape_str(s, value); | |
295 | free(value); | |
296 | } | |
297 | # endif /* HAVE_COCOA */ | |
298 | } | |
299 | ||
300 | strcpy (s, " ) 2>&1"); | |
301 | ||
302 | # ifdef DEBUG | |
303 | fprintf (stderr, "%s: textclient: launch %s: %s\n", progname, | |
304 | (d->pty_p ? "pty" : "pipe"), cmd); | |
305 | # endif | |
306 | ||
307 | #ifdef HAVE_FORKPTY | |
308 | if (d->pty_p) | |
309 | { | |
310 | int fd; | |
311 | struct winsize ws; | |
312 | ||
313 | ws.ws_col = d->char_w; | |
314 | ws.ws_row = d->char_h; | |
315 | ws.ws_xpixel = d->pix_w; | |
316 | ws.ws_ypixel = d->pix_h; | |
317 | ||
318 | d->pipe = 0; | |
319 | ||
320 | # ifdef HAVE_COCOA | |
321 | if (getenv ("MallocScribble")) | |
322 | /* This is here to stop me from wasting my time trying to answer | |
323 | this question the next time I forget about it. */ | |
324 | fprintf (stderr, "%s: WARNING: forkpty hates 'Enable Guard Malloc'\n", | |
325 | progname); | |
326 | # endif | |
327 | ||
328 | if ((d->pid = forkpty(&fd, NULL, NULL, &ws)) < 0) | |
329 | { | |
330 | /* Unable to fork */ | |
331 | sprintf (buf, "%.100s: forkpty", progname); | |
332 | perror (buf); | |
333 | } | |
334 | else if (!d->pid) | |
335 | { | |
336 | /* This is the child fork. */ | |
337 | char *av[10]; | |
338 | int i = 0; | |
339 | if (putenv ("TERM=vt100")) | |
340 | abort(); | |
341 | av[i++] = "/bin/sh"; | |
342 | av[i++] = "-c"; | |
343 | av[i++] = cmd; | |
344 | av[i] = 0; | |
345 | # ifdef DEBUG | |
346 | { | |
347 | int j; | |
348 | fprintf (stderr, "%s: textclient: execvp:", progname); | |
349 | for (j = 0; j < i; j++) | |
350 | fprintf (stderr, " %s", av[j]); | |
351 | fprintf (stderr, "\n"); | |
352 | } | |
353 | # endif | |
354 | execvp (av[0], av); | |
355 | sprintf (buf, "%.100s: %.100s", progname, oprogram); | |
356 | perror (buf); | |
357 | exit (1); | |
358 | } | |
359 | else | |
360 | { | |
361 | /* This is the parent fork. */ | |
362 | if (d->pipe) abort(); | |
363 | d->pipe = fdopen (fd, "r+"); | |
364 | if (d->pipe_id) abort(); | |
365 | d->pipe_id = | |
366 | XtAppAddInput (app, fileno (d->pipe), | |
367 | (XtPointer) (XtInputReadMask | XtInputExceptMask), | |
368 | subproc_cb, (XtPointer) d); | |
369 | # ifdef DEBUG | |
370 | fprintf (stderr, "%s: textclient: pid = %d\n", progname, d->pid); | |
371 | # endif | |
372 | } | |
373 | } | |
374 | else | |
375 | #endif /* HAVE_FORKPTY */ | |
376 | { | |
377 | /* don't mess up controlling terminal on "-pipe -program tcsh". */ | |
378 | static int protected_stdin_p = 0; | |
379 | if (! protected_stdin_p) { | |
380 | fclose (stdin); | |
381 | open ("/dev/null", O_RDWR); /* re-allocate fd 0 */ | |
382 | protected_stdin_p = 1; | |
383 | } | |
384 | ||
385 | if (d->pipe) abort(); | |
386 | if ((d->pipe = popen (cmd, "r"))) | |
387 | { | |
388 | if (d->pipe_id) abort(); | |
389 | d->pipe_id = | |
390 | XtAppAddInput (app, fileno (d->pipe), | |
391 | (XtPointer) (XtInputReadMask | XtInputExceptMask), | |
392 | subproc_cb, (XtPointer) d); | |
393 | # ifdef DEBUG | |
394 | fprintf (stderr, "%s: textclient: popen\n", progname); | |
395 | # endif | |
396 | } | |
397 | else | |
398 | { | |
399 | sprintf (buf, "%.100s: %.100s", progname, cmd); | |
400 | perror (buf); | |
401 | } | |
402 | } | |
403 | ||
404 | free (cmd); | |
405 | } | |
406 | ||
407 | ||
408 | static void | |
409 | relaunch_generator_timer (XtPointer closure, XtIntervalId *id) | |
410 | { | |
411 | text_data *d = (text_data *) closure; | |
412 | /* if (!d->pipe_timer) abort(); */ | |
413 | d->pipe_timer = 0; | |
414 | # ifdef DEBUG | |
415 | fprintf (stderr, "%s: textclient: launch timer fired\n", progname); | |
416 | # endif | |
417 | launch_text_generator (d); | |
418 | } | |
419 | ||
420 | ||
421 | static void | |
422 | start_timer (text_data *d) | |
423 | { | |
424 | XtAppContext app = XtDisplayToApplicationContext (d->dpy); | |
425 | ||
426 | # ifdef DEBUG | |
427 | fprintf (stderr, "%s: textclient: relaunching in %d\n", progname, | |
428 | (int) d->subproc_relaunch_delay); | |
429 | # endif | |
430 | if (d->pipe_timer) | |
431 | XtRemoveTimeOut (d->pipe_timer); | |
432 | d->pipe_timer = | |
433 | XtAppAddTimeOut (app, d->subproc_relaunch_delay, | |
434 | relaunch_generator_timer, | |
435 | (XtPointer) d); | |
436 | } | |
437 | ||
438 | ||
439 | static void | |
440 | close_pipe (text_data *d) | |
441 | { | |
442 | if (d->pid) | |
443 | { | |
444 | # ifdef DEBUG | |
445 | fprintf (stderr, "%s: textclient: kill %d\n", progname, d->pid); | |
446 | # endif | |
447 | kill (d->pid, SIGTERM); | |
448 | } | |
449 | d->pid = 0; | |
450 | ||
451 | if (d->pipe_id) | |
452 | XtRemoveInput (d->pipe_id); | |
453 | d->pipe_id = 0; | |
454 | ||
455 | if (d->pipe) | |
456 | { | |
457 | # ifdef DEBUG | |
458 | fprintf (stderr, "%s: textclient: pclose\n", progname); | |
459 | # endif | |
460 | pclose (d->pipe); | |
461 | } | |
462 | d->pipe = 0; | |
463 | ||
464 | ||
465 | } | |
466 | ||
467 | ||
468 | void | |
469 | textclient_reshape (text_data *d, | |
470 | int pix_w, int pix_h, | |
471 | int char_w, int char_h, | |
472 | int max_lines) | |
473 | { | |
474 | # if defined(HAVE_FORKPTY) && defined(TIOCSWINSZ) | |
475 | ||
476 | d->pix_w = pix_w; | |
477 | d->pix_h = pix_h; | |
478 | d->char_w = char_w; | |
479 | d->char_h = char_h; | |
480 | d->max_lines = max_lines; | |
481 | ||
482 | # ifdef DEBUG | |
483 | fprintf (stderr, "%s: textclient: reshape: %dx%d, %dx%d\n", progname, | |
484 | pix_w, pix_h, char_w, char_h); | |
485 | # endif | |
486 | ||
487 | if (d->pid && d->pipe) | |
488 | { | |
489 | /* Tell the sub-process that the screen size has changed. */ | |
490 | struct winsize ws; | |
491 | ws.ws_col = char_w; | |
492 | ws.ws_row = char_h; | |
493 | ws.ws_xpixel = pix_w; | |
494 | ws.ws_ypixel = pix_h; | |
495 | ioctl (fileno (d->pipe), TIOCSWINSZ, &ws); | |
496 | kill (d->pid, SIGWINCH); | |
497 | # ifdef DEBUG | |
498 | fprintf (stderr, "%s: textclient: SIGWINCH\n", progname); | |
499 | # endif | |
500 | } | |
501 | # endif /* HAVE_FORKPTY && TIOCSWINSZ */ | |
502 | ||
503 | ||
504 | /* If we're running xscreensaver-text, then kill and restart it any | |
505 | time the window is resized so that it gets an updated --cols arg | |
506 | right away. But if we're running something else, leave it alone. | |
507 | */ | |
508 | if (!strcmp (d->program, "xscreensaver-text")) | |
509 | { | |
510 | # ifdef DEBUG | |
511 | fprintf (stderr, "%s: textclient: reshape relaunch\n", progname); | |
512 | # endif | |
513 | close_pipe (d); | |
514 | d->input_available_p = False; | |
515 | start_timer (d); | |
516 | } | |
517 | } | |
518 | ||
519 | ||
520 | text_data * | |
521 | textclient_open (Display *dpy) | |
522 | { | |
523 | text_data *d = (text_data *) calloc (1, sizeof (*d)); | |
524 | ||
525 | # ifdef DEBUG | |
526 | fprintf (stderr, "%s: textclient: init\n", progname); | |
527 | # endif | |
528 | ||
529 | d->dpy = dpy; | |
530 | ||
531 | if (get_boolean_resource (dpy, "usePty", "UsePty")) | |
532 | { | |
533 | # ifdef HAVE_FORKPTY | |
534 | d->pty_p = True; | |
535 | # else | |
536 | fprintf (stderr, | |
537 | "%s: no pty support on this system; using a pipe instead.\n", | |
538 | progname); | |
539 | # endif | |
540 | } | |
541 | ||
542 | d->subproc_relaunch_delay = | |
543 | get_integer_resource (dpy, "relaunchDelay", "Time"); | |
544 | if (d->subproc_relaunch_delay < 1) | |
545 | d->subproc_relaunch_delay = 1; | |
546 | d->subproc_relaunch_delay *= 1000; | |
547 | ||
548 | ||
549 | d->meta_sends_esc_p = get_boolean_resource (dpy, "metaSendsESC", "Boolean"); | |
550 | d->swap_bs_del_p = get_boolean_resource (dpy, "swapBSDEL", "Boolean"); | |
551 | ||
552 | d->program = get_string_resource (dpy, "program", "Program"); | |
553 | ||
554 | ||
555 | # ifdef HAVE_FORKPTY | |
556 | /* Kludge for MacOS standalone mode: see OSX/SaverRunner.m. */ | |
557 | { | |
558 | const char *s = getenv ("XSCREENSAVER_STANDALONE"); | |
559 | if (s && *s && strcmp(s, "0")) | |
560 | { | |
561 | d->pty_p = 1; | |
562 | d->program = strdup (getenv ("SHELL")); | |
563 | # ifdef DEBUG | |
564 | fprintf (stderr, "%s: textclient: standalone: %s\n", | |
565 | progname, d->program); | |
566 | # endif | |
567 | } | |
568 | } | |
569 | # endif | |
570 | ||
571 | start_timer (d); | |
572 | ||
573 | return d; | |
574 | } | |
575 | ||
576 | ||
577 | void | |
578 | textclient_close (text_data *d) | |
579 | { | |
580 | # ifdef DEBUG | |
581 | fprintf (stderr, "%s: textclient: free\n", progname); | |
582 | # endif | |
583 | ||
584 | close_pipe (d); | |
585 | if (d->program) | |
586 | free (d->program); | |
587 | if (d->pipe_timer) | |
588 | XtRemoveTimeOut (d->pipe_timer); | |
589 | d->pipe_timer = 0; | |
590 | memset (d, 0, sizeof (*d)); | |
591 | free (d); | |
592 | } | |
593 | ||
594 | int | |
595 | textclient_getc (text_data *d) | |
596 | { | |
597 | XtAppContext app = XtDisplayToApplicationContext (d->dpy); | |
598 | int ret = -1; | |
599 | ||
600 | if (XtAppPending (app) & (XtIMTimer|XtIMAlternateInput)) | |
601 | XtAppProcessEvent (app, XtIMTimer|XtIMAlternateInput); | |
602 | ||
603 | if (d->out_buffer && *d->out_buffer) | |
604 | { | |
605 | ret = *d->out_buffer; | |
606 | d->out_buffer++; | |
607 | } | |
608 | else if (d->input_available_p && d->pipe) | |
609 | { | |
610 | unsigned char s[2]; | |
611 | int n = read (fileno (d->pipe), (void *) s, 1); | |
612 | if (n > 0) | |
613 | ret = s[0]; | |
614 | else /* EOF */ | |
615 | { | |
616 | if (d->pid) | |
617 | { | |
618 | # ifdef DEBUG | |
619 | fprintf (stderr, "%s: textclient: waitpid %d\n", | |
620 | progname, d->pid); | |
621 | # endif | |
622 | waitpid (d->pid, NULL, 0); | |
623 | d->pid = 0; | |
624 | } | |
625 | ||
626 | close_pipe (d); | |
627 | ||
628 | if (d->out_column > 0) | |
629 | { | |
630 | # ifdef DEBUG | |
631 | fprintf (stderr, "%s: textclient: adding blank line at EOF\n", | |
632 | progname); | |
633 | # endif | |
634 | d->out_buffer = "\r\n\r\n"; | |
635 | } | |
636 | ||
637 | start_timer (d); | |
638 | } | |
639 | d->input_available_p = False; | |
640 | } | |
641 | ||
642 | if (ret == '\r' || ret == '\n') | |
643 | d->out_column = 0; | |
644 | else if (ret > 0) | |
645 | d->out_column++; | |
646 | ||
647 | # ifdef DEBUG | |
648 | if (ret <= 0) | |
649 | fprintf (stderr, "%s: textclient: getc: %d\n", progname, ret); | |
650 | else if (ret < ' ') | |
651 | fprintf (stderr, "%s: textclient: getc: %03o\n", progname, ret); | |
652 | else | |
653 | fprintf (stderr, "%s: textclient: getc: '%c'\n", progname, (char) ret); | |
654 | # endif | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
659 | ||
660 | /* The interpretation of the ModN modifiers is dependent on what keys | |
661 | are bound to them: Mod1 does not necessarily mean "meta". It only | |
662 | means "meta" if Meta_L or Meta_R are bound to it. If Meta_L is on | |
663 | Mod5, then Mod5 is the one that means Meta. Oh, and Meta and Alt | |
664 | aren't necessarily the same thing. Icepicks in my forehead! | |
665 | */ | |
666 | static unsigned int | |
667 | do_icccm_meta_key_stupidity (Display *dpy) | |
668 | { | |
669 | unsigned int modbits = 0; | |
670 | # ifndef HAVE_COCOA | |
671 | int i, j, k; | |
672 | XModifierKeymap *modmap = XGetModifierMapping (dpy); | |
673 | for (i = 3; i < 8; i++) | |
674 | for (j = 0; j < modmap->max_keypermod; j++) | |
675 | { | |
676 | int code = modmap->modifiermap[i * modmap->max_keypermod + j]; | |
677 | KeySym *syms; | |
678 | int nsyms = 0; | |
679 | if (code == 0) continue; | |
680 | syms = XGetKeyboardMapping (dpy, code, 1, &nsyms); | |
681 | for (k = 0; k < nsyms; k++) | |
682 | if (syms[k] == XK_Meta_L || syms[k] == XK_Meta_R || | |
683 | syms[k] == XK_Alt_L || syms[k] == XK_Alt_R) | |
684 | modbits |= (1 << i); | |
685 | XFree (syms); | |
686 | } | |
687 | XFreeModifiermap (modmap); | |
688 | # endif /* HAVE_COCOA */ | |
689 | return modbits; | |
690 | } | |
691 | ||
692 | ||
693 | /* Returns a mask of the bit or bits of a KeyPress event that mean "meta". | |
694 | */ | |
695 | static unsigned int | |
696 | meta_modifier (text_data *d) | |
697 | { | |
698 | if (!d->meta_done_once) | |
699 | { | |
700 | /* Really, we are supposed to recompute this if a KeymapNotify | |
701 | event comes in, but fuck it. */ | |
702 | d->meta_done_once = True; | |
703 | d->meta_mask = do_icccm_meta_key_stupidity (d->dpy); | |
704 | # ifdef DEBUG | |
705 | fprintf (stderr, "%s: textclient: ICCCM Meta is 0x%08X\n", | |
706 | progname, d->meta_mask); | |
707 | # endif | |
708 | } | |
709 | return d->meta_mask; | |
710 | } | |
711 | ||
712 | ||
713 | Bool | |
714 | textclient_putc (text_data *d, XKeyEvent *k) | |
715 | { | |
716 | KeySym keysym; | |
717 | unsigned char c = 0; | |
718 | XLookupString (k, (char *) &c, 1, &keysym, &d->compose); | |
719 | if (c != 0 && d->pipe) | |
720 | { | |
721 | if (!d->swap_bs_del_p) ; | |
722 | else if (c == 127) c = 8; | |
723 | else if (c == 8) c = 127; | |
724 | ||
725 | /* If meta was held down, send ESC, or turn on the high bit. */ | |
726 | if (k->state & meta_modifier (d)) | |
727 | { | |
728 | if (d->meta_sends_esc_p) | |
729 | fputc ('\033', d->pipe); | |
730 | else | |
731 | c |= 0x80; | |
732 | } | |
733 | ||
734 | fputc (c, d->pipe); | |
735 | fflush (d->pipe); | |
736 | k->type = 0; /* don't interpret this event defaultly. */ | |
737 | ||
738 | # ifdef DEBUG | |
739 | fprintf (stderr, "%s: textclient: putc '%c'\n", progname, (char) c); | |
740 | # endif | |
741 | ||
742 | return True; | |
743 | } | |
744 | return False; | |
745 | } | |
746 | ||
747 | #endif /* !HAVE_IPHONE -- whole file */ |