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 <regexp.h>
11 #include <9pclient.h>
12 #include <plumb.h>
13 #include "dat.h"
14 #include "fns.h"
15 
16 CFid *plumbsendfid;
17 CFid *plumbeditfid;
18 
19 Window*	openfile(Text*, Expand*, int);
20 
21 int	nuntitled;
22 
23 void
24 plumbthread(void *v)
25 {
26 	CFid *fid;
27 	Plumbmsg *m;
28 	Timer *t;
29 
30 	USED(v);
31 	threadsetname("plumbproc");
32 	
33 	/*
34 	 * Loop so that if plumber is restarted, acme need not be.
35 	 */
36 	for(;;){
37 		/*
38 		 * Connect to plumber.
39 		 */
40 		plumbunmount();
41 		while((fid = plumbopenfid("edit", OREAD|OCEXEC)) == nil){
42 			t = timerstart(2000);
43 			recv(t->c, nil);
44 			timerstop(t);
45 		}
46 		plumbeditfid = fid;
47 		plumbsendfid = plumbopenfid("send", OWRITE|OCEXEC);
48 	
49 		/*
50 		 * Relay messages.
51 		 */
52 		for(;;){
53 			m = plumbrecvfid(plumbeditfid);
54 			if(m == nil)
55 				break;
56 			sendp(cplumb, m);
57 		}
58 
59 		/*
60 		 * Lost connection.
61 		 */
62 		fid = plumbsendfid;
63 		plumbsendfid = nil;
64 		fsclose(fid);
65 
66 		fid = plumbeditfid;
67 		plumbeditfid = nil;
68 		fsclose(fid);
69 	}
70 }
71 
72 void
73 startplumbing(void)
74 {
75 	cplumb = chancreate(sizeof(Plumbmsg*), 0);
76 	chansetname(cplumb, "cplumb");
77 	threadcreate(plumbthread, nil, STACK);
78 }
79 
80 
81 void
82 look3(Text *t, uint q0, uint q1, int external)
83 {
84 	int n, c, f, expanded;
85 	Text *ct;
86 	Expand e;
87 	Rune *r;
88 	uint p;
89 	Plumbmsg *m;
90 	Runestr dir;
91 	char buf[32];
92 
93 	ct = seltext;
94 	if(ct == nil)
95 		seltext = t;
96 	expanded = expand(t, q0, q1, &e);
97 	if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
98 		/* send alphanumeric expansion to external client */
99 		if(expanded == FALSE)
100 			return;
101 		f = 0;
102 		if((e.u.at!=nil && t->w!=nil) || (e.nname>0 && lookfile(e.name, e.nname)!=nil))
103 			f = 1;		/* acme can do it without loading a file */
104 		if(q0!=e.q0 || q1!=e.q1)
105 			f |= 2;	/* second (post-expand) message follows */
106 		if(e.nname)
107 			f |= 4;	/* it's a file name */
108 		c = 'l';
109 		if(t->what == Body)
110 			c = 'L';
111 		n = q1-q0;
112 		if(n <= EVENTSIZE){
113 			r = runemalloc(n);
114 			bufread(&t->file->b, q0, r, n);
115 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, q0, q1, f, n, n, r);
116 			free(r);
117 		}else
118 			winevent(t->w, "%c%d %d %d 0 \n", c, q0, q1, f, n);
119 		if(q0==e.q0 && q1==e.q1)
120 			return;
121 		if(e.nname){
122 			n = e.nname;
123 			if(e.a1 > e.a0)
124 				n += 1+(e.a1-e.a0);
125 			r = runemalloc(n);
126 			runemove(r, e.name, e.nname);
127 			if(e.a1 > e.a0){
128 				r[e.nname] = ':';
129 				bufread(&e.u.at->file->b, e.a0, r+e.nname+1, e.a1-e.a0);
130 			}
131 		}else{
132 			n = e.q1 - e.q0;
133 			r = runemalloc(n);
134 			bufread(&t->file->b, e.q0, r, n);
135 		}
136 		f &= ~2;
137 		if(n <= EVENTSIZE)
138 			winevent(t->w, "%c%d %d %d %d %.*S\n", c, e.q0, e.q1, f, n, n, r);
139 		else
140 			winevent(t->w, "%c%d %d %d 0 \n", c, e.q0, e.q1, f, n);
141 		free(r);
142 		goto Return;
143 	}
144 	if(plumbsendfid != nil){
145 		/* send whitespace-delimited word to plumber */
146 		m = emalloc(sizeof(Plumbmsg));
147 		m->src = estrdup("acme");
148 		m->dst = nil;
149 		dir = dirname(t, nil, 0);
150 		if(dir.nr==1 && dir.r[0]=='.'){	/* sigh */
151 			free(dir.r);
152 			dir.r = nil;
153 			dir.nr = 0;
154 		}
155 		if(dir.nr == 0)
156 			m->wdir = estrdup(wdir);
157 		else
158 			m->wdir = runetobyte(dir.r, dir.nr);
159 		free(dir.r);
160 		m->type = estrdup("text");
161 		m->attr = nil;
162 		buf[0] = '\0';
163 		if(q1 == q0){
164 			if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
165 				q0 = t->q0;
166 				q1 = t->q1;
167 			}else{
168 				p = q0;
169 				while(q0>0 && (c=tgetc(t, q0-1))!=' ' && c!='\t' && c!='\n')
170 					q0--;
171 				while(q1<t->file->b.nc && (c=tgetc(t, q1))!=' ' && c!='\t' && c!='\n')
172 					q1++;
173 				if(q1 == q0){
174 					plumbfree(m);
175 					goto Return;
176 				}
177 				sprint(buf, "click=%d", p-q0);
178 				m->attr = plumbunpackattr(buf);
179 			}
180 		}
181 		r = runemalloc(q1-q0);
182 		bufread(&t->file->b, q0, r, q1-q0);
183 		m->data = runetobyte(r, q1-q0);
184 		m->ndata = strlen(m->data);
185 		free(r);
186 		if(m->ndata<messagesize-1024 && plumbsendtofid(plumbsendfid, m) >= 0){
187 			plumbfree(m);
188 			goto Return;
189 		}
190 		plumbfree(m);
191 		/* plumber failed to match; fall through */
192 	}
193 
194 	/* interpret alphanumeric string ourselves */
195 	if(expanded == FALSE)
196 		return;
197 	if(e.name || e.u.at)
198 		openfile(t, &e, FALSE);
199 	else{
200 		if(t->w == nil)
201 			return;
202 		ct = &t->w->body;
203 		if(t->w != ct->w)
204 			winlock(ct->w, 'M');
205 		if(t == ct)
206 			textsetselect(ct, e.q1, e.q1);
207 		n = e.q1 - e.q0;
208 		r = runemalloc(n);
209 		bufread(&t->file->b, e.q0, r, n);
210 		if(search(ct, r, n) && e.jump)
211 			moveto(mousectl, addpt(frptofchar(&ct->fr, ct->fr.p0), Pt(4, ct->fr.font->height-4)));
212 		if(t->w != ct->w)
213 			winunlock(ct->w);
214 		free(r);
215 	}
216 
217    Return:
218 	free(e.name);
219 	free(e.bname);
220 }
221 
222 int
223 plumbgetc(void *a, uint n)
224 {
225 	Rune *r;
226 
227 	r = a;
228 	if(n<0 || n>runestrlen(r))
229 		return 0;
230 	return r[n];
231 }
232 
233 void
234 plumblook(Plumbmsg *m)
235 {
236 	Expand e;
237 	char *addr;
238 	int newwindow;
239 
240 	if(m->ndata >= BUFSIZE){
241 		warning(nil, "insanely long file name (%d bytes) in plumb message (%.32s...)\n", m->ndata, m->data);
242 		return;
243 	}
244 	e.q0 = 0;
245 	e.q1 = 0;
246 	if(m->data[0] == '\0')
247 		return;
248 	e.u.ar = nil;
249 	e.bname = m->data;
250 	e.name = bytetorune(e.bname, &e.nname);
251 	e.jump = TRUE;
252 	e.a0 = 0;
253 	e.a1 = 0;
254 	addr = plumblookup(m->attr, "addr");
255 	if(addr != nil){
256 		e.u.ar = bytetorune(addr, &e.a1);
257 		e.agetc = plumbgetc;
258 	}
259 	newwindow = plumblookup(m->attr, "newwindow") != nil;
260 	openfile(nil, &e, newwindow);
261 	free(e.name);
262 	free(e.u.at);
263 	drawtopwindow();
264 }
265 
266 void
267 plumbshow(Plumbmsg *m)
268 {
269 	Window *w;
270 	Rune rb[256], *r;
271 	int nb, nr;
272 	Runestr rs;
273 	char *name, *p, namebuf[16];
274 
275 	w = makenewwindow(nil);
276 	name = plumblookup(m->attr, "filename");
277 	if(name == nil){
278 		name = namebuf;
279 		nuntitled++;
280 		snprint(namebuf, sizeof namebuf, "Untitled-%d", nuntitled);
281 	}
282 	p = nil;
283 	if(name[0]!='/' && m->wdir!=nil && m->wdir[0]!='\0'){
284 		nb = strlen(m->wdir) + 1 + strlen(name) + 1;
285 		p = emalloc(nb);
286 		snprint(p, nb, "%s/%s", m->wdir, name);
287 		name = p;
288 	}
289 	cvttorunes(name, strlen(name), rb, &nb, &nr, nil);
290 	free(p);
291 	rs = cleanrname(runestr(rb, nr));
292 	winsetname(w, rs.r, rs.nr);
293 	r = runemalloc(m->ndata);
294 	cvttorunes(m->data, m->ndata, r, &nb, &nr, nil);
295 	textinsert(&w->body, 0, r, nr, TRUE);
296 	free(r);
297 	w->body.file->mod = FALSE;
298 	w->dirty = FALSE;
299 	winsettag(w);
300 	textscrdraw(&w->body);
301 	textsetselect(&w->tag, w->tag.file->b.nc, w->tag.file->b.nc);
302 	drawtopwindow();
303 }
304 
305 int
306 search(Text *ct, Rune *r, uint n)
307 {
308 	uint q, nb, maxn;
309 	int around;
310 	Rune *s, *b, *c;
311 
312 	if(n==0 || n>ct->file->b.nc)
313 		return FALSE;
314 	if(2*n > RBUFSIZE){
315 		warning(nil, "string too long\n");
316 		return FALSE;
317 	}
318 	maxn = max(2*n, RBUFSIZE);
319 	s = fbufalloc();
320 	b = s;
321 	nb = 0;
322 	b[nb] = 0;
323 	around = 0;
324 	q = ct->q1;
325 	for(;;){
326 		if(q >= ct->file->b.nc){
327 			q = 0;
328 			around = 1;
329 			nb = 0;
330 			b[nb] = 0;
331 		}
332 		if(nb > 0){
333 			c = runestrchr(b, r[0]);
334 			if(c == nil){
335 				q += nb;
336 				nb = 0;
337 				b[nb] = 0;
338 				if(around && q>=ct->q1)
339 					break;
340 				continue;
341 			}
342 			q += (c-b);
343 			nb -= (c-b);
344 			b = c;
345 		}
346 		/* reload if buffer covers neither string nor rest of file */
347 		if(nb<n && nb!=ct->file->b.nc-q){
348 			nb = ct->file->b.nc-q;
349 			if(nb >= maxn)
350 				nb = maxn-1;
351 			bufread(&ct->file->b, q, s, nb);
352 			b = s;
353 			b[nb] = '\0';
354 		}
355 		/* this runeeq is fishy but the null at b[nb] makes it safe */
356 		if(runeeq(b, n, r, n)==TRUE){
357 			if(ct->w){
358 				textshow(ct, q, q+n, 1);
359 				winsettag(ct->w);
360 			}else{
361 				ct->q0 = q;
362 				ct->q1 = q+n;
363 			}
364 			seltext = ct;
365 			fbuffree(s);
366 			return TRUE;
367 		}
368 		if(around && q>=ct->q1)
369 			break;
370 		--nb;
371 		b++;
372 		q++;
373 	}
374 	fbuffree(s);
375 	return FALSE;
376 }
377 
378 int
379 isfilec(Rune r)
380 {
381 	static Rune Lx[] = { '.', '-', '+', '/', ':', 0 };
382 	if(isalnum(r))
383 		return TRUE;
384 	if(runestrchr(Lx, r))
385 		return TRUE;
386 	return FALSE;
387 }
388 
389 /* Runestr wrapper for cleanname */
390 Runestr
391 cleanrname(Runestr rs)
392 {
393 	char *s;
394 	int nb, nulls;
395 
396 	s = runetobyte(rs.r, rs.nr);
397 	cleanname(s);
398 	cvttorunes(s, strlen(s), rs.r, &nb, &rs.nr, &nulls);
399 	free(s);
400 	return rs;
401 }
402 
403 Runestr
404 includefile(Rune *dir, Rune *file, int nfile)
405 {
406 	int m, n;
407 	char *a;
408 	Rune *r;
409 	static Rune Lslash[] = { '/', 0 };
410 
411 	m = runestrlen(dir);
412 	a = emalloc((m+1+nfile)*UTFmax+1);
413 	sprint(a, "%S/%.*S", dir, nfile, file);
414 	n = access(a, 0);
415 	free(a);
416 	if(n < 0)
417 		return runestr(nil, 0);
418 	r = runemalloc(m+1+nfile);
419 	runemove(r, dir, m);
420 	runemove(r+m, Lslash, 1);
421 	runemove(r+m+1, file, nfile);
422 	free(file);
423 	return cleanrname(runestr(r, m+1+nfile));
424 }
425 
426 static	Rune	*objdir;
427 
428 Runestr
429 includename(Text *t, Rune *r, int n)
430 {
431 	Window *w;
432 	char buf[128];
433 	Rune Lsysinclude[] = { '/', 's', 'y', 's', '/', 'i', 'n', 'c', 'l', 'u', 'd', 'e', 0 };
434 	Rune Lusrinclude[] = { '/', 'u', 's', 'r', '/', 'i', 'n', 'c', 'l', 'u', 'd', 'e', 0 };
435 	Rune Lusrlocalinclude[] = { '/', 'u', 's', 'r', '/', 'l', 'o', 'c', 'a', 'l', 
436 			'/', 'i', 'n', 'c', 'l', 'u', 'd', 'e', 0 };
437 	Rune Lusrlocalplan9include[] = { '/', 'u', 's', 'r', '/', 'l', 'o', 'c', 'a', 'l', 
438 			'/', 'p', 'l', 'a', 'n', '9', '/', 'i', 'n', 'c', 'l', 'u', 'd', 'e', 0 };
439 	Runestr file;
440 	int i;
441 
442 	if(objdir==nil && objtype!=nil){
443 		sprint(buf, "/%s/include", objtype);
444 		objdir = bytetorune(buf, &i);
445 		objdir = runerealloc(objdir, i+1);
446 		objdir[i] = '\0';	
447 	}
448 
449 	w = t->w;
450 	if(n==0 || r[0]=='/' || w==nil)
451 		goto Rescue;
452 	if(n>2 && r[0]=='.' && r[1]=='/')
453 		goto Rescue;
454 	file.r = nil;
455 	file.nr = 0;
456 	for(i=0; i<w->nincl && file.r==nil; i++)
457 		file = includefile(w->incl[i], r, n);
458 
459 	if(file.r == nil)
460 		file = includefile(Lsysinclude, r, n);
461 	if(file.r == nil)
462 		file = includefile(Lusrlocalplan9include, r, n);
463 	if(file.r == nil)
464 		file = includefile(Lusrlocalinclude, r, n);
465 	if(file.r == nil)
466 		file = includefile(Lusrinclude, r, n);
467 	if(file.r==nil && objdir!=nil)
468 		file = includefile(objdir, r, n);
469 	if(file.r == nil)
470 		goto Rescue;
471 	return file;
472 
473     Rescue:
474 	return runestr(r, n);
475 }
476 
477 Runestr
478 dirname(Text *t, Rune *r, int n)
479 {
480 	Rune *b, c;
481 	uint m, nt;
482 	int slash;
483 	Runestr tmp;
484 
485 	b = nil;
486 	if(t==nil || t->w==nil)
487 		goto Rescue;
488 	if(dodollarsigns && n>=1 && r[0]=='$')
489 		expandenv(&r, (uint*)&n);
490 	nt = t->w->tag.file->b.nc;
491 	if(nt == 0)
492 		goto Rescue;
493 	if(n>=1 && r[0]=='/')
494 		goto Rescue;
495 	b = runemalloc(nt+n+1);
496 	bufread(&t->w->tag.file->b, 0, b, nt);
497 	slash = -1;
498 	for(m=0; m<nt; m++){
499 		c = b[m];
500 		if(c == '/')
501 			slash = m;
502 		if(c==' ' || c=='\t')
503 			break;
504 	}
505 	if(slash < 0)
506 		goto Rescue;
507 	slash++;
508 	if(dodollarsigns && expandenv(&b, (uint*)&slash))
509 		b = runerealloc(b, slash+n);
510 	runemove(b+slash, r, n);
511 	free(r);
512 	return cleanrname(runestr(b, slash+n));
513 
514     Rescue:
515 	free(b);
516 	tmp = runestr(r, n);
517 	if(r)
518 		return cleanrname(tmp);
519 	return tmp;
520 }
521 
522 int
523 expandfile(Text *t, uint q0, uint q1, Expand *e)
524 {
525 	int i, n, nname, colon, eval;
526 	uint amin, amax;
527 	Rune *r, c;
528 	Window *w;
529 	Runestr rs;
530 
531 	amax = q1;
532 	if(q1 == q0){
533 		colon = -1;
534 		while(q1<t->file->b.nc && isfilec(c=textreadc(t, q1))){
535 			if(c == ':'){
536 				colon = q1;
537 				break;
538 			}
539 			q1++;
540 		}
541 		while(q0>0 && (isfilec(c=textreadc(t, q0-1)) || isaddrc(c) || isregexc(c))){
542 			q0--;
543 			if(colon<0 && c==':')
544 				colon = q0;
545 		}
546 		/*
547 		 * if it looks like it might begin file: , consume address chars after :
548 		 * otherwise terminate expansion at :
549 		 */
550 		if(colon >= 0){
551 			q1 = colon;
552 			if(colon<t->file->b.nc-1 && isaddrc(textreadc(t, colon+1))){
553 				q1 = colon+1;
554 				while(q1<t->file->b.nc && isaddrc(textreadc(t, q1)))
555 					q1++;
556 			}
557 		}
558 		if(q1 > q0)
559 			if(colon >= 0){	/* stop at white space */
560 				for(amax=colon+1; amax<t->file->b.nc; amax++)
561 					if((c=textreadc(t, amax))==' ' || c=='\t' || c=='\n')
562 						break;
563 			}else
564 				amax = t->file->b.nc;
565 	}
566 	amin = amax;
567 	e->q0 = q0;
568 	e->q1 = q1;
569 	n = q1-q0;
570 	if(n == 0)
571 		return FALSE;
572 	/* see if it's a file name */
573 	r = runemalloc(n+1);	/* +1 for possible $ below */
574 	bufread(&t->file->b, q0, r, n);
575 	/* first, does it have bad chars? */
576 	nname = -1;
577 	for(i=0; i<n; i++){
578 		c = r[i];
579 		if(c==':' && nname<0){
580 			if(q0+i+1<t->file->b.nc && (i==n-1 || isaddrc(textreadc(t, q0+i+1))))
581 				amin = q0+i;
582 			else
583 				goto Isntfile;
584 			nname = i;
585 		}
586 	}
587 	if(nname == -1)
588 		nname = n;
589 	for(i=0; i<nname; i++){
590 		if(dodollarsigns && i==0 && r[0]=='$')
591 			continue;
592 		if(!isfilec(r[i]))
593 			goto Isntfile;
594 	}
595 	/*
596 	 * See if it's a file name in <>, and turn that into an include
597 	 * file name if so.  Should probably do it for "" too, but that's not
598 	 * restrictive enough syntax and checking for a #include earlier on the
599 	 * line would be silly.
600 	 */
601 	if(q0>0 && textreadc(t, q0-1)=='<' && q1<t->file->b.nc && textreadc(t, q1)=='>'){
602 		rs = includename(t, r, nname);
603 		r = rs.r;
604 		nname = rs.nr;
605 	}
606 	else if(amin == q0)
607 		goto Isfile;
608 	else{
609 		if(dodollarsigns && r[0] == '$')
610 			expandenv(&r, (uint*)&nname);
611 		else{
612 			rs = dirname(t, r, nname);
613 			r = rs.r;
614 			nname = rs.nr;
615 		}
616 	}
617 	e->bname = runetobyte(r, nname);
618 	/* if it's already a window name, it's a file */
619 	w = lookfile(r, nname);
620 	if(w != nil)
621 		goto Isfile;
622 	/* if it's the name of a file, it's a file */
623 	if(access(e->bname, 0) < 0){
624 		free(e->bname);
625 		e->bname = nil;
626 		goto Isntfile;
627 	}
628 
629   Isfile:
630 	e->name = r;
631 	e->nname = nname;
632 	e->u.at = t;
633 	e->a0 = amin+1;
634 	eval = FALSE;
635 	address(TRUE, nil, range(-1,-1), range(0,0), t, e->a0, amax, tgetc, &eval, (uint*)&e->a1);
636 	return TRUE;
637 
638    Isntfile:
639 	free(r);
640 	return FALSE;
641 }
642 
643 int
644 expand(Text *t, uint q0, uint q1, Expand *e)
645 {
646 	memset(e, 0, sizeof *e);
647 	e->agetc = tgetc;
648 	/* if in selection, choose selection */
649 	e->jump = TRUE;
650 	if(q1==q0 && t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
651 		q0 = t->q0;
652 		q1 = t->q1;
653 		if(t->what == Tag)
654 			e->jump = FALSE;
655 	}
656 
657 	if(expandfile(t, q0, q1, e))
658 		return TRUE;
659 	if(q0 == q1){
660 		while(q1<t->file->b.nc && isalnum(textreadc(t, q1)))
661 			q1++;
662 		while(q0>0 && isalnum(textreadc(t, q0-1)))
663 			q0--;
664 	}
665 	e->q0 = q0;
666 	e->q1 = q1;
667 	return q1 > q0;
668 }
669 
670 Window*
671 lookfile(Rune *s, int n)
672 {
673 	int i, j, k;
674 	Window *w;
675 	Column *c;
676 	Text *t;
677 
678 	/* avoid terminal slash on directories */
679 	if(n>1 && s[n-1] == '/')
680 		--n;
681 	for(j=0; j<row.ncol; j++){
682 		c = row.col[j];
683 		for(i=0; i<c->nw; i++){
684 			w = c->w[i];
685 			t = &w->body;
686 			k = t->file->nname;
687 			if(k>1 && t->file->name[k-1] == '/')
688 				k--;
689 			if(runeeq(t->file->name, k, s, n)){
690 				w = w->body.file->curtext->w;
691 				if(w->col != nil)	/* protect against race deleting w */
692 					return w;
693 			}
694 		}
695 	}
696 	return nil;
697 }
698 
699 Window*
700 lookid(int id, int dump)
701 {
702 	int i, j;
703 	Window *w;
704 	Column *c;
705 
706 	for(j=0; j<row.ncol; j++){
707 		c = row.col[j];
708 		for(i=0; i<c->nw; i++){
709 			w = c->w[i];
710 			if(dump && w->dumpid == id)
711 				return w;
712 			if(!dump && w->id == id)
713 				return w;
714 		}
715 	}
716 	return nil;
717 }
718 
719 
720 Window*
721 openfile(Text *t, Expand *e, int newwindow)
722 {
723 	Range r;
724 	Window *w, *ow;
725 	int eval, i, n;
726 	Rune *rp;
727 	Runestr rs;
728 	uint dummy;
729 
730 	r.q0 = 0;
731 	r.q1 = 0;
732 	if(e->nname == 0){
733 		w = t->w;
734 		if(w == nil)
735 			return nil;
736 	}else{
737 		w = lookfile(e->name, e->nname);
738 		if(w == nil && e->name[0] != '/'){
739 			/*
740 			 * Unrooted path in new window.
741 			 * This can happen if we type a pwd-relative path
742 			 * in the topmost tag or the column tags.  
743 			 * Most of the time plumber takes care of these,
744 			 * but plumber might not be running or might not
745 			 * be configured to accept plumbed directories.
746 			 * Make the name a full path, just like we would if
747 			 * opening via the plumber.
748 			 */
749 			n = utflen(wdir)+1+e->nname+1;
750 			rp = runemalloc(n);
751 			runesnprint(rp, n, "%s/%.*S", wdir, e->nname, e->name);
752 			rs = cleanrname(runestr(rp, n-1));
753 			free(e->name);
754 			e->name = rs.r;
755 			e->nname = rs.nr;
756 			w = lookfile(e->name, e->nname);
757 		}
758 	}
759 	if(w){
760 		if(newwindow==TRUE && !w->isdir)
761 			w = coladd(w->col, nil, w, -1);
762 		t = &w->body;
763 		if(!t->col->safe && t->fr.maxlines==0) /* window is obscured by full-column window */
764 			colgrow(t->col, t->col->w[0], 1);
765 	}else{
766 		ow = nil;
767 		if(t)
768 			ow = t->w;
769 		w = makenewwindow(t);
770 		t = &w->body;
771 		winsetname(w, e->name, e->nname);
772 		textload(t, 0, e->bname, 1);
773 		t->file->mod = FALSE;
774 		t->w->dirty = FALSE;
775 		winsettag(t->w);
776 		textsetselect(&t->w->tag, t->w->tag.file->b.nc, t->w->tag.file->b.nc);
777 		if(ow != nil){
778 			for(i=ow->nincl; --i>=0; ){
779 				n = runestrlen(ow->incl[i]);
780 				rp = runemalloc(n);
781 				runemove(rp, ow->incl[i], n);
782 				winaddincl(w, rp, n);
783 			}
784 			w->autoindent = ow->autoindent;
785 		}else
786 			w->autoindent = globalautoindent;
787 	}
788 	if(e->a1 == e->a0)
789 		eval = FALSE;
790 	else{
791 		eval = TRUE;
792 		r = address(TRUE, t, range(-1,-1), range(t->q0, t->q1), e->u.at, e->a0, e->a1, e->agetc, &eval, &dummy);
793 		if(eval == FALSE)
794 			e->jump = FALSE;	/* don't jump if invalid address */
795 	}
796 	if(eval == FALSE){
797 		r.q0 = t->q0;
798 		r.q1 = t->q1;
799 	}
800 	textshow(t, r.q0, r.q1, 1);
801 	winsettag(t->w);
802 	seltext = t;
803 	if(e->jump)
804 		moveto(mousectl, addpt(frptofchar(&t->fr, t->fr.p0), Pt(4, font->height-4)));
805 	return w;
806 }
807 
808 void
809 new(Text *et, Text *t, Text *argt, int flag1, int flag2, Rune *arg, int narg)
810 {
811 	int ndone;
812 	Rune *a, *f;
813 	int na, nf;
814 	Expand e;
815 	Runestr rs;
816 
817 	getarg(argt, FALSE, TRUE, &a, &na);
818 	if(a){
819 		new(et, t, nil, flag1, flag2, a, na);
820 		if(narg == 0)
821 			return;
822 	}
823 	/* loop condition: *arg is not a blank */
824 	for(ndone=0; ; ndone++){
825 		a = findbl(arg, narg, &na);
826 		if(a == arg){
827 			if(ndone==0 && et->col!=nil)
828 				winsettag(coladd(et->col, nil, nil, -1));
829 			break;
830 		}
831 		nf = narg-na;
832 		f = runemalloc(nf);
833 		runemove(f, arg, nf);
834 		rs = dirname(et, f, nf);
835 		memset(&e, 0, sizeof e);
836 		e.name = rs.r;
837 		e.nname = rs.nr;
838 		e.bname = runetobyte(rs.r, rs.nr);
839 		e.jump = TRUE;
840 		openfile(et, &e, FALSE);
841 		free(e.name);
842 		free(e.bname);
843 		arg = skipbl(a, na, &narg);
844 	}
845 }