Commit | Line | Data |
---|---|---|
7c4625ef | 1 | /* Copyright (c) 1980 Regents of the University of California */ |
b41bbcb5 | 2 | static char *sccsid = "@(#)ex_vget.c 5.1 %G%"; |
e213a660 MH |
3 | #include "ex.h" |
4 | #include "ex_tty.h" | |
5 | #include "ex_vis.h" | |
6 | ||
7 | /* | |
8 | * Input routines for open/visual. | |
9 | * We handle upper case only terminals in visual and reading from the | |
10 | * echo area here as well as notification on large changes | |
11 | * which appears in the echo area. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Return the key. | |
16 | */ | |
17 | ungetkey(c) | |
18 | char c; | |
19 | { | |
20 | ||
21 | if (Peekkey != ATTN) | |
22 | Peekkey = c; | |
23 | } | |
24 | ||
25 | /* | |
26 | * Return a keystroke, but never a ^@. | |
27 | */ | |
28 | getkey() | |
29 | { | |
30 | register char c; | |
31 | ||
32 | do { | |
33 | c = getbr(); | |
34 | if (c==0) | |
35 | beep(); | |
36 | } while (c == 0); | |
37 | return (c); | |
38 | } | |
39 | ||
40 | /* | |
41 | * Tell whether next keystroke would be a ^@. | |
42 | */ | |
43 | peekbr() | |
44 | { | |
45 | ||
46 | Peekkey = getbr(); | |
47 | return (Peekkey == 0); | |
48 | } | |
49 | ||
50 | short precbksl; | |
51 | ||
52 | /* | |
53 | * Get a keystroke, including a ^@. | |
54 | * If an key was returned with ungetkey, that | |
55 | * comes back first. Next comes unread input (e.g. | |
56 | * from repeating commands with .), and finally new | |
57 | * keystrokes. | |
58 | * | |
59 | * The hard work here is in mapping of \ escaped | |
60 | * characters on upper case only terminals. | |
61 | */ | |
62 | getbr() | |
63 | { | |
64 | char ch; | |
65 | register int c, d; | |
66 | register char *colp; | |
d266c416 MH |
67 | #define BEEHIVE |
68 | #ifdef BEEHIVE | |
69 | static char Peek2key; | |
70 | #endif | |
71 | extern short slevel, ttyindes; | |
e213a660 MH |
72 | |
73 | getATTN: | |
74 | if (Peekkey) { | |
75 | c = Peekkey; | |
76 | Peekkey = 0; | |
77 | return (c); | |
78 | } | |
d266c416 MH |
79 | #ifdef BEEHIVE |
80 | if (Peek2key) { | |
81 | c = Peek2key; | |
82 | Peek2key = 0; | |
83 | return (c); | |
84 | } | |
85 | #endif | |
e213a660 MH |
86 | if (vglobp) { |
87 | if (*vglobp) | |
88 | return (lastvgk = *vglobp++); | |
89 | lastvgk = 0; | |
90 | return (ESCAPE); | |
91 | } | |
92 | if (vmacp) { | |
93 | if (*vmacp) | |
94 | return(*vmacp++); | |
95 | /* End of a macro or set of nested macros */ | |
96 | vmacp = 0; | |
44232d5b MH |
97 | if (inopen == -1) /* don't screw up undo for esc esc */ |
98 | vundkind = VMANY; | |
e213a660 | 99 | inopen = 1; /* restore old setting now that macro done */ |
d266c416 | 100 | vch_mac = VC_NOTINMAC; |
e213a660 | 101 | } |
e213a660 MH |
102 | flusho(); |
103 | again: | |
d266c416 | 104 | if (read(slevel == 0 ? 0 : ttyindes, &ch, 1) != 1) { |
e213a660 MH |
105 | if (errno == EINTR) |
106 | goto getATTN; | |
107 | error("Input read error"); | |
108 | } | |
109 | c = ch & TRIM; | |
d266c416 MH |
110 | #ifdef BEEHIVE |
111 | if (XB && slevel==0 && c == ESCAPE) { | |
112 | if (read(0, &Peek2key, 1) != 1) | |
113 | goto getATTN; | |
114 | Peek2key &= TRIM; | |
115 | switch (Peek2key) { | |
116 | case 'C': /* SPOW mode sometimes sends \EC for space */ | |
117 | c = ' '; | |
118 | Peek2key = 0; | |
119 | break; | |
120 | case 'q': /* f2 -> ^C */ | |
121 | c = CTRL(c); | |
122 | Peek2key = 0; | |
123 | break; | |
124 | case 'p': /* f1 -> esc */ | |
125 | Peek2key = 0; | |
126 | break; | |
127 | } | |
128 | } | |
129 | #endif | |
e213a660 MH |
130 | |
131 | #ifdef UCVISUAL | |
132 | /* | |
133 | * The algorithm here is that of the UNIX kernel. | |
134 | * See the description in the programmers manual. | |
135 | */ | |
136 | if (UPPERCASE) { | |
137 | if (isupper(c)) | |
138 | c = tolower(c); | |
139 | if (c == '\\') { | |
140 | if (precbksl < 2) | |
141 | precbksl++; | |
142 | if (precbksl == 1) | |
143 | goto again; | |
144 | } else if (precbksl) { | |
145 | d = 0; | |
146 | if (islower(c)) | |
147 | d = toupper(c); | |
148 | else { | |
149 | colp = "({)}!|^~'~"; | |
150 | while (d = *colp++) | |
151 | if (d == c) { | |
152 | d = *colp++; | |
153 | break; | |
154 | } else | |
155 | colp++; | |
156 | } | |
157 | if (precbksl == 2) { | |
158 | if (!d) { | |
159 | Peekkey = c; | |
160 | precbksl = 0; | |
161 | c = '\\'; | |
162 | } | |
163 | } else if (d) | |
164 | c = d; | |
165 | else { | |
166 | Peekkey = c; | |
167 | precbksl = 0; | |
168 | c = '\\'; | |
169 | } | |
170 | } | |
171 | if (c != '\\') | |
172 | precbksl = 0; | |
173 | } | |
174 | #endif | |
175 | #ifdef TRACE | |
176 | if (trace) { | |
177 | if (!techoin) { | |
178 | tfixnl(); | |
179 | techoin = 1; | |
180 | fprintf(trace, "*** Input: "); | |
181 | } | |
182 | tracec(c); | |
183 | } | |
184 | #endif | |
185 | lastvgk = 0; | |
186 | return (c); | |
187 | } | |
188 | ||
189 | /* | |
190 | * Get a key, but if a delete, quit or attention | |
191 | * is typed return 0 so we will abort a partial command. | |
192 | */ | |
193 | getesc() | |
194 | { | |
195 | register int c; | |
196 | ||
197 | c = getkey(); | |
198 | switch (c) { | |
199 | ||
887e3e0d MH |
200 | case CTRL(v): |
201 | case CTRL(q): | |
202 | c = getkey(); | |
203 | return (c); | |
204 | ||
e213a660 MH |
205 | case ATTN: |
206 | case QUIT: | |
207 | ungetkey(c); | |
208 | return (0); | |
209 | ||
210 | case ESCAPE: | |
211 | return (0); | |
212 | } | |
213 | return (c); | |
214 | } | |
215 | ||
216 | /* | |
217 | * Peek at the next keystroke. | |
218 | */ | |
219 | peekkey() | |
220 | { | |
221 | ||
222 | Peekkey = getkey(); | |
223 | return (Peekkey); | |
224 | } | |
225 | ||
226 | /* | |
227 | * Read a line from the echo area, with single character prompt c. | |
228 | * A return value of 1 means the user blewit or blewit away. | |
229 | */ | |
230 | readecho(c) | |
231 | char c; | |
232 | { | |
233 | register char *sc = cursor; | |
234 | register int (*OP)(); | |
235 | bool waste; | |
236 | register int OPeek; | |
237 | ||
238 | if (WBOT == WECHO) | |
239 | vclean(); | |
240 | else | |
241 | vclrech(0); | |
242 | splitw++; | |
243 | vgoto(WECHO, 0); | |
244 | putchar(c); | |
245 | vclreol(); | |
246 | vgoto(WECHO, 1); | |
247 | cursor = linebuf; linebuf[0] = 0; genbuf[0] = c; | |
248 | if (peekbr()) { | |
249 | if (!INS[0] || (INS[0] & (QUOTE|TRIM)) == OVERBUF) | |
250 | goto blewit; | |
251 | vglobp = INS; | |
252 | } | |
253 | OP = Pline; Pline = normline; | |
254 | ignore(vgetline(0, genbuf + 1, &waste)); | |
d266c416 MH |
255 | if (Outchar == termchar) |
256 | putchar('\n'); | |
e213a660 MH |
257 | vscrap(); |
258 | Pline = OP; | |
259 | if (Peekkey != ATTN && Peekkey != QUIT && Peekkey != CTRL(h)) { | |
260 | cursor = sc; | |
261 | vclreol(); | |
262 | return (0); | |
263 | } | |
264 | blewit: | |
265 | OPeek = Peekkey==CTRL(h) ? 0 : Peekkey; Peekkey = 0; | |
266 | splitw = 0; | |
267 | vclean(); | |
268 | vshow(dot, NOLINE); | |
269 | vnline(sc); | |
270 | Peekkey = OPeek; | |
271 | return (1); | |
272 | } | |
273 | ||
274 | /* | |
275 | * A complete command has been defined for | |
276 | * the purposes of repeat, so copy it from | |
277 | * the working to the previous command buffer. | |
278 | */ | |
279 | setLAST() | |
280 | { | |
281 | ||
d266c416 | 282 | if (vglobp || vmacp) |
e213a660 MH |
283 | return; |
284 | lastreg = vreg; | |
285 | lasthad = Xhadcnt; | |
286 | lastcnt = Xcnt; | |
287 | *lastcp = 0; | |
288 | CP(lastcmd, workcmd); | |
289 | } | |
290 | ||
291 | /* | |
292 | * Gather up some more text from an insert. | |
293 | * If the insertion buffer oveflows, then destroy | |
294 | * the repeatability of the insert. | |
295 | */ | |
296 | addtext(cp) | |
297 | char *cp; | |
298 | { | |
299 | ||
300 | if (vglobp) | |
301 | return; | |
302 | addto(INS, cp); | |
303 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) | |
304 | lastcmd[0] = 0; | |
305 | } | |
306 | ||
307 | setDEL() | |
308 | { | |
309 | ||
310 | setBUF(DEL); | |
311 | } | |
312 | ||
313 | /* | |
314 | * Put text from cursor upto wcursor in BUF. | |
315 | */ | |
316 | setBUF(BUF) | |
317 | register char *BUF; | |
318 | { | |
319 | register int c; | |
320 | register char *wp = wcursor; | |
321 | ||
322 | c = *wp; | |
323 | *wp = 0; | |
324 | BUF[0] = 0; | |
325 | addto(BUF, cursor); | |
326 | *wp = c; | |
327 | } | |
328 | ||
329 | addto(buf, str) | |
330 | register char *buf, *str; | |
331 | { | |
332 | ||
333 | if ((buf[0] & (QUOTE|TRIM)) == OVERBUF) | |
334 | return; | |
335 | if (strlen(buf) + strlen(str) + 1 >= VBSIZE) { | |
336 | buf[0] = OVERBUF; | |
337 | return; | |
338 | } | |
339 | ignore(strcat(buf, str)); | |
340 | } | |
341 | ||
342 | /* | |
343 | * Note a change affecting a lot of lines, or non-visible | |
344 | * lines. If the parameter must is set, then we only want | |
345 | * to do this for open modes now; return and save for later | |
346 | * notification in visual. | |
347 | */ | |
348 | noteit(must) | |
349 | bool must; | |
350 | { | |
351 | register int sdl = destline, sdc = destcol; | |
352 | ||
353 | if (notecnt < 2 || !must && state == VISUAL) | |
354 | return (0); | |
355 | splitw++; | |
356 | if (WBOT == WECHO) | |
357 | vmoveitup(1, 1); | |
358 | vigoto(WECHO, 0); | |
359 | printf("%d %sline", notecnt, notesgn); | |
360 | if (notecnt > 1) | |
361 | putchar('s'); | |
362 | if (*notenam) { | |
363 | printf(" %s", notenam); | |
364 | if (*(strend(notenam) - 1) != 'e') | |
365 | putchar('e'); | |
366 | putchar('d'); | |
367 | } | |
368 | vclreol(); | |
369 | notecnt = 0; | |
370 | if (state != VISUAL) | |
371 | vcnt = vcline = 0; | |
372 | splitw = 0; | |
373 | if (state == ONEOPEN || state == CRTOPEN) | |
374 | vup1(); | |
375 | destline = sdl; destcol = sdc; | |
376 | return (1); | |
377 | } | |
378 | ||
379 | /* | |
380 | * Rrrrringgggggg. | |
381 | * If possible, use flash (VB). | |
382 | */ | |
383 | beep() | |
384 | { | |
385 | ||
386 | if (VB) | |
387 | vputp(VB, 0); | |
388 | else | |
389 | vputc(CTRL(g)); | |
390 | } | |
391 | ||
392 | /* | |
393 | * Map the command input character c, | |
394 | * for keypads and labelled keys which do cursor | |
395 | * motions. I.e. on an adm3a we might map ^K to ^P. | |
396 | * DM1520 for example has a lot of mappable characters. | |
397 | */ | |
398 | ||
399 | map(c,maps) | |
400 | register int c; | |
401 | register struct maps *maps; | |
402 | { | |
403 | register int d; | |
404 | register char *p, *q; | |
405 | char b[10]; /* Assumption: no keypad sends string longer than 10 */ | |
406 | ||
407 | /* | |
408 | * Mapping for special keys on the terminal only. | |
409 | * BUG: if there's a long sequence and it matches | |
410 | * some chars and then misses, we lose some chars. | |
411 | * | |
412 | * For this to work, some conditions must be met. | |
413 | * 1) Keypad sends SHORT (2 or 3 char) strings | |
414 | * 2) All strings sent are same length & similar | |
415 | * 3) The user is unlikely to type the first few chars of | |
416 | * one of these strings very fast. | |
417 | * Note: some code has been fixed up since the above was laid out, | |
418 | * so conditions 1 & 2 are probably not required anymore. | |
419 | * However, this hasn't been tested with any first char | |
420 | * that means anything else except escape. | |
421 | */ | |
422 | #ifdef MDEBUG | |
423 | if (trace) | |
424 | fprintf(trace,"map(%c): ",c); | |
425 | #endif | |
d266c416 MH |
426 | /* |
427 | * If c==0, the char came from getesc typing escape. Pass it through | |
428 | * unchanged. 0 messes up the following code anyway. | |
429 | */ | |
430 | if (c==0) | |
431 | return(0); | |
432 | ||
e213a660 MH |
433 | b[0] = c; |
434 | b[1] = 0; | |
435 | for (d=0; maps[d].mapto; d++) { | |
436 | #ifdef MDEBUG | |
437 | if (trace) | |
d266c416 | 438 | fprintf(trace,"\ntry '%s', ",maps[d].cap); |
e213a660 MH |
439 | #endif |
440 | if (p = maps[d].cap) { | |
441 | for (q=b; *p; p++, q++) { | |
442 | #ifdef MDEBUG | |
443 | if (trace) | |
444 | fprintf(trace,"q->b[%d], ",q-b); | |
445 | #endif | |
446 | if (*q==0) { | |
447 | /* | |
d266c416 MH |
448 | * Is there another char waiting? |
449 | * | |
e213a660 MH |
450 | * This test is oversimplified, but |
451 | * should work mostly. It handles the | |
452 | * case where we get an ESCAPE that | |
453 | * wasn't part of a keypad string. | |
454 | */ | |
455 | if ((c=='#' ? peekkey() : fastpeekkey()) == 0) { | |
456 | #ifdef MDEBUG | |
887e3e0d | 457 | if (trace) |
d266c416 | 458 | fprintf(trace,"fpk=0: return '%c'",c); |
e213a660 | 459 | #endif |
887e3e0d | 460 | /* |
d266c416 MH |
461 | * Nothing waiting. Push back |
462 | * what we peeked at & return | |
463 | * failure (c). | |
464 | * | |
887e3e0d MH |
465 | * We want to be able to undo |
466 | * commands, but it's nonsense | |
467 | * to undo part of an insertion | |
468 | * so if in input mode don't. | |
469 | */ | |
470 | macpush(&b[1],maps == arrows); | |
e213a660 MH |
471 | return(c); |
472 | } | |
473 | *q = getkey(); | |
474 | q[1] = 0; | |
475 | } | |
476 | if (*p != *q) | |
477 | goto contin; | |
478 | } | |
d266c416 | 479 | macpush(maps[d].mapto,maps == arrows); |
e213a660 MH |
480 | c = getkey(); |
481 | #ifdef MDEBUG | |
d266c416 MH |
482 | if (trace) |
483 | fprintf(trace,"Success: push(%s), return %c",maps[d].mapto, c); | |
e213a660 MH |
484 | #endif |
485 | return(c); /* first char of map string */ | |
486 | contin:; | |
487 | } | |
488 | } | |
489 | #ifdef MDEBUG | |
490 | if (trace) | |
d266c416 | 491 | fprintf(trace,"Fail: push(%s), return %c", &b[1], c); |
e213a660 | 492 | #endif |
44232d5b | 493 | macpush(&b[1],0); |
e213a660 MH |
494 | return(c); |
495 | } | |
496 | ||
497 | /* | |
498 | * Push st onto the front of vmacp. This is tricky because we have to | |
499 | * worry about where vmacp was previously pointing. We also have to | |
500 | * check for overflow (which is typically from a recursive macro) | |
501 | * Finally we have to set a flag so the whole thing can be undone. | |
44232d5b MH |
502 | * canundo is 1 iff we want to be able to undo the macro. This |
503 | * is false for, for example, pushing back lookahead from fastpeekkey(), | |
504 | * since otherwise two fast escapes can clobber our undo. | |
e213a660 | 505 | */ |
44232d5b | 506 | macpush(st, canundo) |
e213a660 | 507 | char *st; |
44232d5b | 508 | int canundo; |
e213a660 MH |
509 | { |
510 | char tmpbuf[BUFSIZ]; | |
511 | ||
512 | if (st==0 || *st==0) | |
513 | return; | |
d266c416 | 514 | #ifdef notdef |
887e3e0d MH |
515 | if (!value(UNDOMACRO)) |
516 | canundo = 0; | |
d266c416 | 517 | #endif |
e213a660 MH |
518 | #ifdef TRACE |
519 | if (trace) | |
d266c416 | 520 | fprintf(trace, "macpush(%s), canundo=%d\n",st,canundo); |
e213a660 | 521 | #endif |
887e3e0d | 522 | if ((vmacp ? strlen(vmacp) : 0) + strlen(st) > BUFSIZ) |
e213a660 | 523 | error("Macro too long@ - maybe recursive?"); |
44232d5b | 524 | if (vmacp) { |
e213a660 | 525 | strcpy(tmpbuf, vmacp); |
887e3e0d MH |
526 | if (!FIXUNDO) |
527 | canundo = 0; /* can't undo inside a macro anyway */ | |
44232d5b | 528 | } |
e213a660 MH |
529 | strcpy(vmacbuf, st); |
530 | if (vmacp) | |
531 | strcat(vmacbuf, tmpbuf); | |
532 | vmacp = vmacbuf; | |
533 | /* arrange to be able to undo the whole macro */ | |
44232d5b | 534 | if (canundo) { |
d266c416 | 535 | #ifdef notdef |
44232d5b MH |
536 | otchng = tchng; |
537 | vsave(); | |
538 | saveall(); | |
887e3e0d | 539 | inopen = -1; /* no need to save since it had to be 1 or -1 before */ |
44232d5b | 540 | vundkind = VMANY; |
d266c416 MH |
541 | #endif |
542 | vch_mac = VC_NOCHANGE; | |
44232d5b | 543 | } |
887e3e0d MH |
544 | } |
545 | ||
e213a660 | 546 | #ifdef TRACE |
d266c416 MH |
547 | visdump(s) |
548 | char *s; | |
549 | { | |
550 | register int i; | |
551 | ||
552 | if (!trace) return; | |
553 | ||
554 | fprintf(trace, "\n%s: basWTOP=%d, basWLINES=%d, WTOP=%d, WBOT=%d, WLINES=%d, WCOLS=%d, WECHO=%d\n", | |
555 | s, basWTOP, basWLINES, WTOP, WBOT, WLINES, WCOLS, WECHO); | |
556 | fprintf(trace, " vcnt=%d, vcline=%d, cursor=%d, wcursor=%d, wdot=%d\n", | |
557 | vcnt, vcline, cursor-linebuf, wcursor-linebuf, wdot-zero); | |
558 | for (i=0; i<TUBELINES; i++) | |
559 | if (vtube[i] && *vtube[i]) | |
560 | fprintf(trace, "%d: '%s'\n", i, vtube[i]); | |
561 | tvliny(); | |
562 | } | |
563 | ||
887e3e0d MH |
564 | vudump(s) |
565 | char *s; | |
566 | { | |
d266c416 MH |
567 | register line *p; |
568 | ||
569 | if (!trace) return; | |
570 | ||
571 | fprintf(trace, "\n%s: undkind=%d, vundkind=%d, unddel=%d, undap1=%d, undap2=%d,\n", | |
572 | s, undkind, vundkind, lineno(unddel), lineno(undap1), lineno(undap2)); | |
573 | fprintf(trace, " undadot=%d, dot=%d, dol=%d, unddol=%d, truedol=%d\n", | |
574 | lineno(undadot), lineno(dot), lineno(dol), lineno(unddol), lineno(truedol)); | |
575 | fprintf(trace, " ["); | |
576 | for (p=zero+1; p<=truedol; p++) | |
577 | fprintf(trace, "%o ", *p); | |
578 | fprintf(trace, "]\n"); | |
e213a660 | 579 | } |
887e3e0d | 580 | #endif |
e213a660 MH |
581 | |
582 | /* | |
583 | * Get a count from the keyed input stream. | |
584 | * A zero count is indistinguishable from no count. | |
585 | */ | |
586 | vgetcnt() | |
587 | { | |
588 | register int c, cnt; | |
589 | ||
590 | cnt = 0; | |
591 | for (;;) { | |
592 | c = getkey(); | |
593 | if (!isdigit(c)) | |
594 | break; | |
595 | cnt *= 10, cnt += c - '0'; | |
596 | } | |
597 | ungetkey(c); | |
598 | Xhadcnt = 1; | |
599 | Xcnt = cnt; | |
600 | return(cnt); | |
601 | } | |
602 | ||
603 | /* | |
604 | * fastpeekkey is just like peekkey but insists the character come in | |
605 | * fast (within 1 second). This will succeed if it is the 2nd char of | |
606 | * a machine generated sequence (such as a function pad from an escape | |
607 | * flavor terminal) but fail for a human hitting escape then waiting. | |
608 | */ | |
609 | fastpeekkey() | |
610 | { | |
611 | int trapalarm(); | |
612 | register int c; | |
613 | ||
887e3e0d MH |
614 | /* |
615 | * If the user has set notimeout, we wait forever for a key. | |
616 | * If we are in a macro we do too, but since it's already | |
617 | * buffered internally it will return immediately. | |
618 | * In other cases we force this to die in 1 second. | |
619 | * This is pretty reliable (VMUNIX rounds it to .5 - 1.5 secs, | |
620 | * but UNIX truncates it to 0 - 1 secs) but due to system delays | |
621 | * there are times when arrow keys or very fast typing get counted | |
622 | * as separate. notimeout is provided for people who dislike such | |
623 | * nondeterminism. | |
624 | */ | |
625 | if (value(TIMEOUT) && inopen >= 0) { | |
626 | signal(SIGALRM, trapalarm); | |
627 | alarm(1); | |
628 | } | |
e213a660 MH |
629 | CATCH |
630 | c = peekkey(); | |
631 | #ifdef MDEBUG | |
632 | if (trace) | |
633 | fprintf(trace,"[OK]",c); | |
634 | #endif | |
635 | alarm(0); | |
636 | ONERR | |
637 | c = 0; | |
638 | #ifdef MDEBUG | |
639 | if (trace) | |
640 | fprintf(trace,"[TOUT]",c); | |
641 | #endif | |
642 | ENDCATCH | |
643 | #ifdef MDEBUG | |
644 | if (trace) | |
645 | fprintf(trace,"[fpk:%o]",c); | |
646 | #endif | |
647 | return(c); | |
648 | } | |
649 | ||
650 | trapalarm() { | |
651 | alarm(0); | |
652 | longjmp(vreslab,1); | |
653 | } |