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Date:: Thu Jan 12 05:43:26 2006 UTC
Message:: more tweaks
Actions:: History | Blame | Raw File
1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <thread.h>
5 #include <cursor.h>
6 #include <mouse.h>
7 #include <keyboard.h>
8 #include <frame.h>
9 #include <fcall.h>
10 #include <plumb.h>
11 #include "dat.h"
12 #include "fns.h"
13 	/* for generating syms in mkfile only: */
14 	#include <bio.h>
15 	#include "edit.h"
16 
17 void	mousethread(void*);
18 void	keyboardthread(void*);
19 void	waitthread(void*);
20 void	xfidallocthread(void*);
21 void	newwindowthread(void*);
22 void plumbproc(void*);
23 
24 Reffont	**fontcache;
25 int		nfontcache;
26 char		wdir[512] = ".";
27 Reffont	*reffonts[2];
28 int		snarffd = -1;
29 int		mainpid;
30 int		swapscrollbuttons = FALSE;
31 
32 enum{
33 	NSnarf = 1000	/* less than 1024, I/O buffer size */
34 };
35 Rune	snarfrune[NSnarf+1];
36 
37 char		*fontnames[2] =
38 {
39 	"/lib/font/bit/lucidasans/euro.8.font",
40 	"/lib/font/bit/lucm/unicode.9.font",
41 };
42 
43 Command *command;
44 
45 void	shutdownthread(void*);
46 void	acmeerrorinit(void);
47 void	readfile(Column*, char*);
48 static int	shutdown(void*, char*);
49 
50 void
51 derror(Display *d, char *errorstr)
52 {
53 	USED(d);
54 	error(errorstr);
55 }
56 
57 void
58 threadmain(int argc, char *argv[])
59 {
60 	int i;
61 	char *p, *loadfile;
62 	Column *c;
63 	int ncol;
64 	Display *d;
65 
66 	rfork(RFENVG|RFNAMEG);
67 
68 	ncol = -1;
69 
70 	loadfile = nil;
71 	ARGBEGIN{
72 	case '$':
73 		dodollarsigns = TRUE;
74 		break;
75 	case 'D':
76 		{extern int _threaddebuglevel;
77 		_threaddebuglevel = ~0;
78 		}
79 		break;
80 	case 'a':
81 		globalautoindent = TRUE;
82 		break;
83 	case 'b':
84 		bartflag = TRUE;
85 		break;
86 	case 'c':
87 		p = ARGF();
88 		if(p == nil)
89 			goto Usage;
90 		ncol = atoi(p);
91 		if(ncol <= 0)
92 			goto Usage;
93 		break;
94 	case 'f':
95 		fontnames[0] = ARGF();
96 		if(fontnames[0] == nil)
97 			goto Usage;
98 		break;
99 	case 'F':
100 		fontnames[1] = ARGF();
101 		if(fontnames[1] == nil)
102 			goto Usage;
103 		break;
104 	case 'l':
105 		loadfile = ARGF();
106 		if(loadfile == nil)
107 			goto Usage;
108 		break;
109 	case 'r':
110 		swapscrollbuttons = TRUE;
111 		break;
112 	case 'W':
113 		winsize = ARGF();
114 		if(winsize == nil)
115 			goto Usage;
116 		break;
117 	default:
118 	Usage:
119 		fprint(2, "usage: acme -a -c ncol -f fontname -F fixedwidthfontname -l loadfile -W winsize\n");
120 		threadexitsall("usage");
121 	}ARGEND
122 
123 	fontnames[0] = estrdup(fontnames[0]);
124 	fontnames[1] = estrdup(fontnames[1]);
125 
126 	quotefmtinstall();
127 	cputype = getenv("cputype");
128 	objtype = getenv("objtype");
129 	home = getenv("HOME");
130 	p = getenv("tabstop");
131 	if(p != nil){
132 		maxtab = strtoul(p, nil, 0);
133 		free(p);
134 	}
135 	if(maxtab == 0)
136 		maxtab = 4; 
137 	if(loadfile)
138 		rowloadfonts(loadfile);
139 	putenv("font", fontnames[0]);
140 	snarffd = open("/dev/snarf", OREAD|OCEXEC);
141 /*
142 	if(cputype){
143 		sprint(buf, "/acme/bin/%s", cputype);
144 		bind(buf, "/bin", MBEFORE);
145 	}
146 	bind("/acme/bin", "/bin", MBEFORE);
147 */
148 	getwd(wdir, sizeof wdir);
149 
150 /*
151 	if(geninitdraw(nil, derror, fontnames[0], "acme", nil, Refnone) < 0){
152 		fprint(2, "acme: can't open display: %r\n");
153 		threadexitsall("geninitdraw");
154 	}
155 */
156 	if(initdraw(derror, fontnames[0], "acme") < 0){
157 		fprint(2, "acme: can't open display: %r\n");
158 		threadexitsall("initdraw");
159 	}
160 
161 	d = display;
162 	font = d->defaultfont;
163 //assert(font);
164 
165 	reffont.f = font;
166 	reffonts[0] = &reffont;
167 	incref(&reffont.ref);	/* one to hold up 'font' variable */
168 	incref(&reffont.ref);	/* one to hold up reffonts[0] */
169 	fontcache = emalloc(sizeof(Reffont*));
170 	nfontcache = 1;
171 	fontcache[0] = &reffont;
172 
173 	iconinit();
174 	timerinit();
175 	rxinit();
176 
177 	cwait = threadwaitchan();
178 	ccommand = chancreate(sizeof(Command**), 0);
179 	chansetname(ccommand, "ccommand");
180 	ckill = chancreate(sizeof(Rune*), 0);
181 	chansetname(ckill, "ckill");
182 	cxfidalloc = chancreate(sizeof(Xfid*), 0);
183 	chansetname(cxfidalloc, "cxfidalloc");
184 	cxfidfree = chancreate(sizeof(Xfid*), 0);
185 	chansetname(cxfidfree, "cxfidfree");
186 	cnewwindow = chancreate(sizeof(Channel*), 0);
187 	chansetname(cnewwindow, "cnewwindow");
188 	cerr = chancreate(sizeof(char*), 0);
189 	chansetname(cerr, "cerr");
190 	cedit = chancreate(sizeof(int), 0);
191 	chansetname(cedit, "cedit");
192 	cexit = chancreate(sizeof(int), 0);
193 	chansetname(cexit, "cexit");
194 	cwarn = chancreate(sizeof(void*), 1);
195 	chansetname(cwarn, "cwarn");
196 	if(cwait==nil || ccommand==nil || ckill==nil || cxfidalloc==nil || cxfidfree==nil || cerr==nil || cexit==nil || cwarn==nil){
197 		fprint(2, "acme: can't create initial channels: %r\n");
198 		threadexitsall("channels");
199 	}
200 
201 	mousectl = initmouse(nil, screen);
202 	if(mousectl == nil){
203 		fprint(2, "acme: can't initialize mouse: %r\n");
204 		threadexitsall("mouse");
205 	}
206 	mouse = &mousectl->m;
207 	keyboardctl = initkeyboard(nil);
208 	if(keyboardctl == nil){
209 		fprint(2, "acme: can't initialize keyboard: %r\n");
210 		threadexitsall("keyboard");
211 	}
212 	mainpid = getpid();
213 	startplumbing();
214 /*
215 	plumbeditfd = plumbopen("edit", OREAD|OCEXEC);
216 	if(plumbeditfd < 0)
217 		fprint(2, "acme: can't initialize plumber: %r\n");
218 	else{
219 		cplumb = chancreate(sizeof(Plumbmsg*), 0);
220 		threadcreate(plumbproc, nil, STACK);
221 	}
222 	plumbsendfd = plumbopen("send", OWRITE|OCEXEC);
223 */
224 
225 	fsysinit();
226 
227 	#define	WPERCOL	8
228 	disk = diskinit();
229 	if(!loadfile || !rowload(&row, loadfile, TRUE)){
230 		rowinit(&row, screen->clipr);
231 		if(ncol < 0){
232 			if(argc == 0)
233 				ncol = 2;
234 			else{
235 				ncol = (argc+(WPERCOL-1))/WPERCOL;
236 				if(ncol < 2)
237 					ncol = 2;
238 			}
239 		}
240 		if(ncol == 0)
241 			ncol = 2;
242 		for(i=0; i<ncol; i++){
243 			c = rowadd(&row, nil, -1);
244 			if(c==nil && i==0)
245 				error("initializing columns");
246 		}
247 		c = row.col[row.ncol-1];
248 		if(argc == 0)
249 			readfile(c, wdir);
250 		else
251 			for(i=0; i<argc; i++){
252 				p = utfrrune(argv[i], '/');
253 				if((p!=nil && strcmp(p, "/guide")==0) || i/WPERCOL>=row.ncol)
254 					readfile(c, argv[i]);
255 				else
256 					readfile(row.col[i/WPERCOL], argv[i]);
257 			}
258 	}
259 	flushimage(display, 1);
260 
261 	acmeerrorinit();
262 	threadcreate(keyboardthread, nil, STACK);
263 	threadcreate(mousethread, nil, STACK);
264 	threadcreate(waitthread, nil, STACK);
265 	threadcreate(xfidallocthread, nil, STACK);
266 	threadcreate(newwindowthread, nil, STACK);
267 /*	threadcreate(shutdownthread, nil, STACK); */
268 	threadnotify(shutdown, 1);
269 	recvul(cexit);
270 	killprocs();
271 	threadexitsall(nil);
272 }
273 
274 void
275 readfile(Column *c, char *s)
276 {
277 	Window *w;
278 	Rune rb[256];
279 	int nb, nr;
280 	Runestr rs;
281 
282 	w = coladd(c, nil, nil, -1);
283 	cvttorunes(s, strlen(s), rb, &nb, &nr, nil);
284 	rs = cleanrname(runestr(rb, nr));
285 	winsetname(w, rs.r, rs.nr);
286 	textload(&w->body, 0, s, 1);
287 	w->body.file->mod = FALSE;
288 	w->dirty = FALSE;
289 	winsettag(w);
290 	winresize(w, w->r, FALSE, TRUE);
291 	textscrdraw(&w->body);
292 	textsetselect(&w->tag, w->tag.file->b.nc, w->tag.file->b.nc);
293 }
294 
295 char *ignotes[] = {
296 	"sys: write on closed pipe",
297 	"sys: ttin",
298 	"sys: ttou",
299 	"sys: tstp",
300 	nil
301 };
302 
303 char *oknotes[] ={
304 	"delete",
305 	"hangup",
306 	"kill",
307 	"exit",
308 	nil
309 };
310 
311 int	dumping;
312 
313 static int
314 shutdown(void *v, char *msg)
315 {
316 	int i;
317 
318 	USED(v);
319 
320 	for(i=0; ignotes[i]; i++)
321 		if(strncmp(ignotes[i], msg, strlen(ignotes[i])) == 0)
322 			return 1;
323 	
324 	killprocs();
325 	if(!dumping && strcmp(msg, "kill")!=0 && strcmp(msg, "exit")!=0 && getpid()==mainpid){
326 		dumping = TRUE;
327 		rowdump(&row, nil);
328 	}
329 	for(i=0; oknotes[i]; i++)
330 		if(strncmp(oknotes[i], msg, strlen(oknotes[i])) == 0)
331 			threadexitsall(msg);
332 	print("acme: %s\n", msg);
333 	return 0;
334 }
335 
336 /*
337 void
338 shutdownthread(void *v)
339 {
340 	char *msg;
341 	Channel *c;
342 
343 	USED(v);
344 
345 	threadsetname("shutdown");
346 	c = threadnotechan();
347 	while((msg = recvp(c)) != nil)
348 		shutdown(nil, msg);
349 }
350 */
351 
352 void
353 killprocs(void)
354 {
355 	Command *c;
356 
357 	fsysclose();
358 //	if(display)
359 //		flushimage(display, 1);
360 
361 	for(c=command; c; c=c->next)
362 		postnote(PNGROUP, c->pid, "hangup");
363 }
364 
365 static int errorfd;
366 int erroutfd;
367 
368 void
369 acmeerrorproc(void *v)
370 {
371 	char *buf;
372 	int n;
373 
374 	USED(v);
375 	threadsetname("acmeerrorproc");
376 	buf = emalloc(8192+1);
377 	while((n=read(errorfd, buf, 8192)) >= 0){
378 		buf[n] = '\0';
379 		sendp(cerr, estrdup(buf));
380 	}
381 }
382 
383 void
384 acmeerrorinit(void)
385 {
386 	int pfd[2];
387 
388 	if(pipe(pfd) < 0)
389 		error("can't create pipe");
390 #if 0
391 	sprint(acmeerrorfile, "/srv/acme.%s.%d", getuser(), mainpid);
392 	fd = create(acmeerrorfile, OWRITE, 0666);
393 	if(fd < 0){
394 		remove(acmeerrorfile);
395   		fd = create(acmeerrorfile, OWRITE, 0666);
396 		if(fd < 0)
397 			error("can't create acmeerror file");
398 	}
399 	sprint(buf, "%d", pfd[0]);
400 	write(fd, buf, strlen(buf));
401 	close(fd);
402 	/* reopen pfd[1] close on exec */
403 	sprint(buf, "/fd/%d", pfd[1]);
404 	errorfd = open(buf, OREAD|OCEXEC);
405 #endif
406 	fcntl(pfd[0], F_SETFD, FD_CLOEXEC);
407 	fcntl(pfd[1], F_SETFD, FD_CLOEXEC);
408 	erroutfd = pfd[0];
409 	errorfd = pfd[1];
410 	if(errorfd < 0)
411 		error("can't re-open acmeerror file");
412 	proccreate(acmeerrorproc, nil, STACK);
413 }
414 
415 /*
416 void
417 plumbproc(void *v)
418 {
419 	Plumbmsg *m;
420 
421 	USED(v);
422 	threadsetname("plumbproc");
423 	for(;;){
424 		m = threadplumbrecv(plumbeditfd);
425 		if(m == nil)
426 			threadexits(nil);
427 		sendp(cplumb, m);
428 	}
429 }
430 */
431 
432 void
433 keyboardthread(void *v)
434 {
435 	Rune r;
436 	Timer *timer;
437 	Text *t;
438 	enum { KTimer, KKey, NKALT };
439 	static Alt alts[NKALT+1];
440 
441 	USED(v);
442 	alts[KTimer].c = nil;
443 	alts[KTimer].v = nil;
444 	alts[KTimer].op = CHANNOP;
445 	alts[KKey].c = keyboardctl->c;
446 	alts[KKey].v = &r;
447 	alts[KKey].op = CHANRCV;
448 	alts[NKALT].op = CHANEND;
449 
450 	timer = nil;
451 	typetext = nil;
452 	threadsetname("keyboardthread");
453 	for(;;){
454 		switch(alt(alts)){
455 		case KTimer:
456 			timerstop(timer);
457 			t = typetext;
458 			if(t!=nil && t->what==Tag){
459 				winlock(t->w, 'K');
460 				wincommit(t->w, t);
461 				winunlock(t->w);
462 				flushimage(display, 1);
463 			}
464 			alts[KTimer].c = nil;
465 			alts[KTimer].op = CHANNOP;
466 			break;
467 		case KKey:
468 		casekeyboard:
469 			typetext = rowtype(&row, r, mouse->xy);
470 			t = typetext;
471 			if(t!=nil && t->col!=nil && !(r==Kdown || r==Kleft || r==Kright))	/* scrolling doesn't change activecol */
472 				activecol = t->col;
473 			if(t!=nil && t->w!=nil)
474 				t->w->body.file->curtext = &t->w->body;
475 			if(timer != nil)
476 				timercancel(timer);
477 			if(t!=nil && t->what==Tag) {
478 				timer = timerstart(500);
479 				alts[KTimer].c = timer->c;
480 				alts[KTimer].op = CHANRCV;
481 			}else{
482 				timer = nil;
483 				alts[KTimer].c = nil;
484 				alts[KTimer].op = CHANNOP;
485 			}
486 			if(nbrecv(keyboardctl->c, &r) > 0)
487 				goto casekeyboard;
488 			flushimage(display, 1);
489 			break;
490 		}
491 	}
492 }
493 
494 void
495 mousethread(void *v)
496 {
497 	Text *t, *argt;
498 	int but;
499 	uint q0, q1;
500 	Window *w;
501 	Plumbmsg *pm;
502 	Mouse m;
503 	char *act;
504 	enum { MResize, MMouse, MPlumb, MWarnings, NMALT };
505 	static Alt alts[NMALT+1];
506 
507 	USED(v);
508 	threadsetname("mousethread");
509 	alts[MResize].c = mousectl->resizec;
510 	alts[MResize].v = nil;
511 	alts[MResize].op = CHANRCV;
512 	alts[MMouse].c = mousectl->c;
513 	alts[MMouse].v = &mousectl->m;
514 	alts[MMouse].op = CHANRCV;
515 	alts[MPlumb].c = cplumb;
516 	alts[MPlumb].v = &pm;
517 	alts[MPlumb].op = CHANRCV;
518 	alts[MWarnings].c = cwarn;
519 	alts[MWarnings].v = nil;
520 	alts[MWarnings].op = CHANRCV;
521 	if(cplumb == nil)
522 		alts[MPlumb].op = CHANNOP;
523 	alts[NMALT].op = CHANEND;
524 	
525 	for(;;){
526 		qlock(&row.lk);
527 		flushwarnings();
528 		qunlock(&row.lk);
529 		flushimage(display, 1);
530 		switch(alt(alts)){
531 		case MResize:
532 			if(getwindow(display, Refnone) < 0)
533 				error("attach to window");
534 			draw(screen, screen->r, display->white, nil, ZP);
535 			scrlresize();
536 			rowresize(&row, screen->clipr);
537 			break;
538 		case MPlumb:
539 			if(strcmp(pm->type, "text") == 0){
540 				act = plumblookup(pm->attr, "action");
541 				if(act==nil || strcmp(act, "showfile")==0)
542 					plumblook(pm);
543 				else if(strcmp(act, "showdata")==0)
544 					plumbshow(pm);
545 			}
546 			plumbfree(pm);
547 			break;
548 		case MWarnings:
549 			break;
550 		case MMouse:
551 			/*
552 			 * Make a copy so decisions are consistent; mousectl changes
553 			 * underfoot.  Can't just receive into m because this introduces
554 			 * another race; see /sys/src/libdraw/mouse.c.
555 			 */
556 			m = mousectl->m;
557 			qlock(&row.lk);
558 			t = rowwhich(&row, m.xy);
559 			if(t!=mousetext && mousetext!=nil && mousetext->w!=nil){
560 				winlock(mousetext->w, 'M');
561 				mousetext->eq0 = ~0;
562 				wincommit(mousetext->w, mousetext);
563 				winunlock(mousetext->w);
564 			}
565 			mousetext = t;
566 			if(t == nil)
567 				goto Continue;
568 			w = t->w;
569 			if(t==nil || m.buttons==0)
570 				goto Continue;
571 			but = 0;
572 			if(m.buttons == 1)
573 				but = 1;
574 			else if(m.buttons == 2)
575 				but = 2;
576 			else if(m.buttons == 4)
577 				but = 3;
578 			barttext = t;
579 			if(t->what==Body && ptinrect(m.xy, t->scrollr)){
580 				if(but){
581 					if(swapscrollbuttons){
582 						if(but == 1)
583 							but = 3;
584 						else if(but == 3)
585 							but = 1;
586 					}
587 					winlock(w, 'M');
588 					t->eq0 = ~0;
589 					textscroll(t, but);
590 					winunlock(w);
591 				}
592 				goto Continue;
593 			}
594 			/* scroll buttons, wheels, etc. */
595 /*
596  * TAG used to require t->what==Body but now allow
597  * scroll wheel in tag too.
598  */
599 			if(w != nil && (m.buttons & (8|16))){
600 				if(m.buttons & 8)
601 					but = Kscrolloneup;
602 				else
603 					but = Kscrollonedown;
604 				winlock(w, 'M');
605 				t->eq0 = ~0;
606 				texttype(t, but);
607 				winunlock(w);
608 				goto Continue;
609 			}
610 			if(ptinrect(m.xy, t->scrollr)){
611 				if(but){
612 					if(t->what == Columntag)
613 						rowdragcol(&row, t->col, but);
614 					else if(t->what == Tag){
615 						coldragwin(t->col, t->w, but);
616 						if(t->w)
617 							barttext = &t->w->body;
618 					}
619 					if(t->col)
620 						activecol = t->col;
621 				}
622 				goto Continue;
623 			}
624 			if(m.buttons){
625 				if(w)
626 					winlock(w, 'M');
627 				t->eq0 = ~0;
628 				if(w)
629 					wincommit(w, t);
630 				else
631 					textcommit(t, TRUE);
632 				if(m.buttons & 1){
633 					textselect(t);
634 					if(w)
635 						winsettag(w);
636 					argtext = t;
637 					seltext = t;
638 					if(t->col)
639 						activecol = t->col;	/* button 1 only */
640 					if(t->w!=nil && t==&t->w->body)
641 						activewin = t->w;
642 				}else if(m.buttons & 2){
643 					if(textselect2(t, &q0, &q1, &argt))
644 						execute(t, q0, q1, FALSE, argt);
645 				}else if(m.buttons & 4){
646 					if(textselect3(t, &q0, &q1))
647 						look3(t, q0, q1, FALSE);
648 				}
649 				if(w)
650 					winunlock(w);
651 				goto Continue;
652 			}
653     Continue:
654 			qunlock(&row.lk);
655 			break;
656 		}
657 	}
658 }
659 
660 /*
661  * There is a race between process exiting and our finding out it was ever created.
662  * This structure keeps a list of processes that have exited we haven't heard of.
663  */
664 typedef struct Pid Pid;
665 struct Pid
666 {
667 	int	pid;
668 	char	msg[ERRMAX];
669 	Pid	*next;
670 };
671 
672 void
673 waitthread(void *v)
674 {
675 	Waitmsg *w;
676 	Command *c, *lc;
677 	uint pid;
678 	int found, ncmd;
679 	Rune *cmd;
680 	char *err;
681 	Text *t;
682 	Pid *pids, *p, *lastp;
683 	enum { WErr, WKill, WWait, WCmd, NWALT };
684 	Alt alts[NWALT+1];
685 
686 	USED(v);
687 	threadsetname("waitthread");
688 	pids = nil;
689 	alts[WErr].c = cerr;
690 	alts[WErr].v = &err;
691 	alts[WErr].op = CHANRCV;
692 	alts[WKill].c = ckill;
693 	alts[WKill].v = &cmd;
694 	alts[WKill].op = CHANRCV;
695 	alts[WWait].c = cwait;
696 	alts[WWait].v = &w;
697 	alts[WWait].op = CHANRCV;
698 	alts[WCmd].c = ccommand;
699 	alts[WCmd].v = &c;
700 	alts[WCmd].op = CHANRCV;
701 	alts[NWALT].op = CHANEND;
702 
703 	command = nil;
704 	for(;;){
705 		switch(alt(alts)){
706 		case WErr:
707 			qlock(&row.lk);
708 			warning(nil, "%s", err);
709 			free(err);
710 			flushimage(display, 1);
711 			qunlock(&row.lk);
712 			break;
713 		case WKill:
714 			found = FALSE;
715 			ncmd = runestrlen(cmd);
716 			for(c=command; c; c=c->next){
717 				/* -1 for blank */
718 				if(runeeq(c->name, c->nname-1, cmd, ncmd) == TRUE){
719 					if(postnote(PNGROUP, c->pid, "kill") < 0)
720 						warning(nil, "kill %S: %r\n", cmd);
721 					found = TRUE;
722 				}
723 			}
724 			if(!found)
725 				warning(nil, "Kill: no process %S\n", cmd);
726 			free(cmd);
727 			break;
728 		case WWait:
729 			pid = w->pid;
730 			lc = nil;
731 			for(c=command; c; c=c->next){
732 				if(c->pid == pid){
733 					if(lc)
734 						lc->next = c->next;
735 					else
736 						command = c->next;
737 					break;
738 				}
739 				lc = c;
740 			}
741 			qlock(&row.lk);
742 			t = &row.tag;
743 			textcommit(t, TRUE);
744 			if(c == nil){
745 				/* helper processes use this exit status */
746 				if(strncmp(w->msg, "libthread", 9) != 0){
747 					p = emalloc(sizeof(Pid));
748 					p->pid = pid;
749 					strncpy(p->msg, w->msg, sizeof(p->msg));
750 					p->next = pids;
751 					pids = p;
752 				}
753 			}else{
754 				if(search(t, c->name, c->nname)){
755 					textdelete(t, t->q0, t->q1, TRUE);
756 					textsetselect(t, 0, 0);
757 				}
758 				if(w->msg[0])
759 					warning(c->md, "%.*S: exit %s\n", c->nname-1, c->name, w->msg);
760 				flushimage(display, 1);
761 			}
762 			qunlock(&row.lk);
763 			free(w);
764     Freecmd:
765 			if(c){
766 				if(c->iseditcmd)
767 					sendul(cedit, 0);
768 				free(c->text);
769 				free(c->name);
770 				fsysdelid(c->md);
771 				free(c);
772 			}
773 			break;
774 		case WCmd:
775 			/* has this command already exited? */
776 			lastp = nil;
777 			for(p=pids; p!=nil; p=p->next){
778 				if(p->pid == c->pid){
779 					if(p->msg[0])
780 						warning(c->md, "%s\n", p->msg);
781 					if(lastp == nil)
782 						pids = p->next;
783 					else
784 						lastp->next = p->next;
785 					free(p);
786 					goto Freecmd;
787 				}
788 				lastp = p;
789 			}
790 			c->next = command;
791 			command = c;
792 			qlock(&row.lk);
793 			t = &row.tag;
794 			textcommit(t, TRUE);
795 			textinsert(t, 0, c->name, c->nname, TRUE);
796 			textsetselect(t, 0, 0);
797 			flushimage(display, 1);
798 			qunlock(&row.lk);
799 			break;
800 		}
801 	}
802 }
803 
804 void
805 xfidallocthread(void *v)
806 {
807 	Xfid *xfree, *x;
808 	enum { Alloc, Free, N };
809 	static Alt alts[N+1];
810 
811 	USED(v);
812 	threadsetname("xfidallocthread");
813 	alts[Alloc].c = cxfidalloc;
814 	alts[Alloc].v = nil;
815 	alts[Alloc].op = CHANRCV;
816 	alts[Free].c = cxfidfree;
817 	alts[Free].v = &x;
818 	alts[Free].op = CHANRCV;
819 	alts[N].op = CHANEND;
820 
821 	xfree = nil;
822 	for(;;){
823 		switch(alt(alts)){
824 		case Alloc:
825 			x = xfree;
826 			if(x)
827 				xfree = x->next;
828 			else{
829 				x = emalloc(sizeof(Xfid));
830 				x->c = chancreate(sizeof(void(*)(Xfid*)), 0);
831 				chansetname(x->c, "xc%p", x->c);
832 				x->arg = x;
833 				threadcreate(xfidctl, x->arg, STACK);
834 			}
835 			sendp(cxfidalloc, x);
836 			break;
837 		case Free:
838 			x->next = xfree;
839 			xfree = x;
840 			break;
841 		}
842 	}
843 }
844 
845 /* this thread, in the main proc, allows fsysproc to get a window made without doing graphics */
846 void
847 newwindowthread(void *v)
848 {
849 	Window *w;
850 
851 	USED(v);
852 	threadsetname("newwindowthread");
853 
854 	for(;;){
855 		/* only fsysproc is talking to us, so synchronization is trivial */
856 		recvp(cnewwindow);
857 		w = makenewwindow(nil);
858 		winsettag(w);
859 		sendp(cnewwindow, w);
860 	}
861 }
862 
863 Reffont*
864 rfget(int fix, int save, int setfont, char *name)
865 {
866 	Reffont *r;
867 	Font *f;
868 	int i;
869 
870 	r = nil;
871 	if(name == nil){
872 		name = fontnames[fix];
873 		r = reffonts[fix];
874 	}
875 	if(r == nil){
876 		for(i=0; i<nfontcache; i++)
877 			if(strcmp(name, fontcache[i]->f->name) == 0){
878 				r = fontcache[i];
879 				goto Found;
880 			}
881 		f = openfont(display, name);
882 		if(f == nil){
883 			fprint(2, "can't open font file %s: %r\n", name);
884 			warning(nil, "can't open font file %s: %r\n", name);
885 			return nil;
886 		}
887 		r = emalloc(sizeof(Reffont));
888 		r->f = f;
889 		fontcache = erealloc(fontcache, (nfontcache+1)*sizeof(Reffont*));
890 		fontcache[nfontcache++] = r;
891 	}
892     Found:
893 	if(save){
894 		incref(&r->ref);
895 		if(reffonts[fix])
896 			rfclose(reffonts[fix]);
897 		reffonts[fix] = r;
898 		if(fontnames[fix] != name){
899 			free(fontnames[fix]);
900 			fontnames[fix] = estrdup(name);
901 		}
902 	}
903 	if(setfont){
904 		reffont.f = r->f;
905 		incref(&r->ref);
906 		rfclose(reffonts[0]);
907 		font = r->f;
908 		reffonts[0] = r;
909 		incref(&r->ref);
910 		iconinit();
911 	}
912 	incref(&r->ref);
913 	return r;
914 }
915 
916 void
917 rfclose(Reffont *r)
918 {
919 	int i;
920 
921 	if(decref(&r->ref) == 0){
922 		for(i=0; i<nfontcache; i++)
923 			if(r == fontcache[i])
924 				break;
925 		if(i >= nfontcache)
926 			warning(nil, "internal error: can't find font in cache\n");
927 		else{
928 			nfontcache--;
929 			memmove(fontcache+i, fontcache+i+1, (nfontcache-i)*sizeof(Reffont*));
930 		}
931 		freefont(r->f);
932 		free(r);
933 	}
934 }
935 
936 Cursor boxcursor = {
937 	{-7, -7},
938 	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
939 	 0xFF, 0xFF, 0xF8, 0x1F, 0xF8, 0x1F, 0xF8, 0x1F,
940 	 0xF8, 0x1F, 0xF8, 0x1F, 0xF8, 0x1F, 0xFF, 0xFF,
941 	 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
942 	{0x00, 0x00, 0x7F, 0xFE, 0x7F, 0xFE, 0x7F, 0xFE,
943 	 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E,
944 	 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E, 0x70, 0x0E,
945 	 0x7F, 0xFE, 0x7F, 0xFE, 0x7F, 0xFE, 0x00, 0x00}
946 };
947 
948 void
949 iconinit(void)
950 {
951 	Rectangle r;
952 	Image *tmp;
953 
954 	/* Blue */
955 	tagcols[BACK] = allocimagemix(display, DPalebluegreen, DWhite);
956 	tagcols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreygreen);
957 	tagcols[BORD] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPurpleblue);
958 	tagcols[TEXT] = display->black;
959 	tagcols[HTEXT] = display->black;
960 
961 	/* Yellow */
962 	textcols[BACK] = allocimagemix(display, DPaleyellow, DWhite);
963 	textcols[HIGH] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DDarkyellow);
964 	textcols[BORD] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DYellowgreen);
965 	textcols[TEXT] = display->black;
966 	textcols[HTEXT] = display->black;
967 
968 	if(button){
969 		freeimage(button);
970 		freeimage(modbutton);
971 		freeimage(colbutton);
972 	}
973 
974 	r = Rect(0, 0, Scrollwid+2, font->height+1);
975 	button = allocimage(display, r, screen->chan, 0, DNofill);
976 	draw(button, r, tagcols[BACK], nil, r.min);
977 	r.max.x -= 2;
978 	border(button, r, 2, tagcols[BORD], ZP);
979 
980 	r = button->r;
981 	modbutton = allocimage(display, r, screen->chan, 0, DNofill);
982 	draw(modbutton, r, tagcols[BACK], nil, r.min);
983 	r.max.x -= 2;
984 	border(modbutton, r, 2, tagcols[BORD], ZP);
985 	r = insetrect(r, 2);
986 	tmp = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DMedblue);
987 	draw(modbutton, r, tmp, nil, ZP);
988 	freeimage(tmp);
989 
990 	r = button->r;
991 	colbutton = allocimage(display, r, screen->chan, 0, DPurpleblue);
992 
993 	but2col = allocimage(display, r, screen->chan, 1, 0xAA0000FF);
994 	but3col = allocimage(display, r, screen->chan, 1, 0x006600FF);
995 }
996 
997 /*
998  * /dev/snarf updates when the file is closed, so we must open our own
999  * fd here rather than use snarffd
1000  */
1001 
1002 /* rio truncates larges snarf buffers, so this avoids using the
1003  * service if the string is huge */
1004 
1005 #define MAXSNARF 100*1024
1006 
1007 void
1008 acmeputsnarf(void)
1009 {
1010 	int i, n;
1011 	Fmt f;
1012 	char *s;
1013 
1014 	if(snarfbuf.nc==0)
1015 		return;
1016 	if(snarfbuf.nc > MAXSNARF)
1017 		return;
1018 
1019 	fmtstrinit(&f);
1020 	for(i=0; i<snarfbuf.nc; i+=n){
1021 		n = snarfbuf.nc-i;
1022 		if(n >= NSnarf)
1023 			n = NSnarf;
1024 		bufread(&snarfbuf, i, snarfrune, n);
1025 		if(fmtprint(&f, "%.*S", n, snarfrune) < 0)
1026 			break;
1027 	}
1028 	s = fmtstrflush(&f);
1029 	if(s && s[0])
1030 		putsnarf(s);
1031 	free(s);
1032 }
1033 
1034 void
1035 acmegetsnarf(void)
1036 {
1037 	char *s;
1038 	int nb, nr, nulls, len;
1039 	Rune *r;
1040 
1041 	s = getsnarf();
1042 	if(s == nil || s[0]==0){
1043 		free(s);
1044 		return;
1045 	}
1046 
1047 	len = strlen(s);
1048 	r = runemalloc(len+1);
1049 	cvttorunes(s, len, r, &nb, &nr, &nulls);
1050 	bufreset(&snarfbuf);
1051 	bufinsert(&snarfbuf, 0, r, nr);
1052 	free(r);
1053 	free(s);
1054 }