Subversion Repositories planix.SVN

#include <u.h>

#include <libc.h>

#include <bio.h>

#include <thread.h>

#include "win.h"

Window*

newwindow(void)

{

	char buf[12];

	Window *w;

	w = emalloc(sizeof(Window));

	w->ctl = open("/mnt/wsys/new/ctl", ORDWR|OCEXEC);

	if(w->ctl<0 || read(w->ctl, buf, 12)!=12)

		error("can't open window ctl file: %r");

	ctlprint(w->ctl, "noscroll\n");

	w->id = atoi(buf);

	w->event = winopenfile(w, "event");

	w->addr = -1;	/* will be opened when needed */

	w->body = nil;

	w->data = -1;

	w->cevent = chancreate(sizeof(Event*), 0);

	if(w->cevent == nil)

		error("cevent is nil: %r");

	return w;

}

void

winsetdump(Window *w, char *dir, char *cmd)

{

	if(dir != nil)

		ctlprint(w->ctl, "dumpdir %s\n", dir);

	if(cmd != nil)

		ctlprint(w->ctl, "dump %s\n", cmd);

}

void

wineventproc(void *v)

{

	Window *w;

	int i;

	threadsetname("wineventproc");

	w = v;

	for(i=0; ; i++){

		if(i >= NEVENT)

			i = 0;

		wingetevent(w, &w->e[i]);

		sendp(w->cevent, &w->e[i]);

	}

}

int

winopenfile(Window *w, char *f)

{

	char buf[64];

	int fd;

	sprint(buf, "/mnt/wsys/%d/%s", w->id, f);

	fd = open(buf, ORDWR|OCEXEC);

	if(fd < 0)

		error("can't open window file %s: %r", f);

	return fd;

}

void

wintagwrite(Window *w, char *s, int n)

{

	int fd;

	fd = winopenfile(w, "tag");

	if(write(fd, s, n) != n)

		error("tag write: %r");

	close(fd);

}

void

winname(Window *w, char *s)

{

	ctlprint(w->ctl, "name %s\n", s);

}

void

winopenbody(Window *w, int mode)

{

	char buf[256];

	sprint(buf, "/mnt/wsys/%d/body", w->id);

	w->body = Bopen(buf, mode|OCEXEC);

	if(w->body == nil)

		error("can't open window body file: %r");

}

void

winclosebody(Window *w)

{

	if(w->body != nil){

		Bterm(w->body);

		w->body = nil;

	}

}

void

winwritebody(Window *w, char *s, int n)

{

	if(w->body == nil)

		winopenbody(w, OWRITE);

	if(Bwrite(w->body, s, n) != n)

		error("write error to window: %r");

}

int

wingetec(Window *w)

{

	if(w->nbuf == 0){

		w->nbuf = read(w->event, w->buf, sizeof w->buf);

		if(w->nbuf <= 0){

			/* probably because window has exited, and only called by wineventproc, so just shut down */

			threadexits(nil);

		}

		w->bufp = w->buf;

	}

	w->nbuf--;

	return *w->bufp++;

}

int

wingeten(Window *w)

{

	int n, c;

	n = 0;

	while('0'<=(c=wingetec(w)) && c<='9')

		n = n*10+(c-'0');

	if(c != ' ')

		error("event number syntax");

	return n;

}

int

wingeter(Window *w, char *buf, int *nb)

{

	Rune r;

	int n;

	r = wingetec(w);

	buf[0] = r;

	n = 1;

	if(r >= Runeself) {

		while(!fullrune(buf, n))

			buf[n++] = wingetec(w);

		chartorune(&r, buf);

	} 

	*nb = n;

	return r;

}

void

wingetevent(Window *w, Event *e)

{

	int i, nb;

	e->c1 = wingetec(w);

	e->c2 = wingetec(w);

	e->q0 = wingeten(w);

	e->q1 = wingeten(w);

	e->flag = wingeten(w);

	e->nr = wingeten(w);

	if(e->nr > EVENTSIZE)

		error("event string too long");

	e->nb = 0;

	for(i=0; i<e->nr; i++){

		e->r[i] = wingeter(w, e->b+e->nb, &nb);

		e->nb += nb;

	}

	e->r[e->nr] = 0;

	e->b[e->nb] = 0;

	if(wingetec(w) != '\n')

		error("event syntax error");

}

void

winwriteevent(Window *w, Event *e)

{

	fprint(w->event, "%c%c%d %d\n", e->c1, e->c2, e->q0, e->q1);

}

static int

nrunes(char *s, int nb)

{

	int i, n;

	Rune r;

	n = 0;

	for(i=0; i<nb; n++)

		i += chartorune(&r, s+i);

	return n;

}

void

winread(Window *w, uint q0, uint q1, char *data)

{

	int m, n, nr;

	char buf[256];

	if(w->addr < 0)

		w->addr = winopenfile(w, "addr");

	if(w->data < 0)

		w->data = winopenfile(w, "data");

	m = q0;

	while(m < q1){

		n = sprint(buf, "#%d", m);

		if(write(w->addr, buf, n) != n)

			error("error writing addr: %r");

		n = read(w->data, buf, sizeof buf);

		if(n <= 0)

			error("reading data: %r");

		nr = nrunes(buf, n);

		while(m+nr >q1){

			do; while(n>0 && (buf[--n]&0xC0)==0x80);

			--nr;

		}

		if(n == 0)

			break;

		memmove(data, buf, n);

		data += n;

		*data = 0;

		m += nr;

	}

}

void

windormant(Window *w)

{

	if(w->addr >= 0){

		close(w->addr);

		w->addr = -1;

	}

	if(w->body != nil){

		Bterm(w->body);

		w->body = nil;

	}

	if(w->data >= 0){

		close(w->data);

		w->data = -1;

	}

}

int

windel(Window *w, int sure)

{

	if(sure)

		write(w->ctl, "delete\n", 7);

	else if(write(w->ctl, "del\n", 4) != 4)

		return 0;

	/* event proc will die due to read error from event file */

	windormant(w);

	close(w->ctl);

	w->ctl = -1;

	close(w->event);

	w->event = -1;

	return 1;

}

void

winclean(Window *w)

{

	if(w->body)

		Bflush(w->body);

	ctlprint(w->ctl, "clean\n");

}

int

winsetaddr(Window *w, char *addr, int errok)

{

	if(w->addr < 0)

		w->addr = winopenfile(w, "addr");

	if(write(w->addr, addr, strlen(addr)) < 0){

		if(!errok)

			error("error writing addr(%s): %r", addr);

		return 0;

	}

	return 1;

}

int

winselect(Window *w, char *addr, int errok)

{

	if(winsetaddr(w, addr, errok)){

		ctlprint(w->ctl, "dot=addr\n");

		return 1;

	}

	return 0;

}

char*

winreadbody(Window *w, int *np)	/* can't use readfile because acme doesn't report the length */

{

	char *s;

	int m, na, n;

	if(w->body != nil)

		winclosebody(w);

	winopenbody(w, OREAD);

	s = nil;

	na = 0;

	n = 0;

	for(;;){

		if(na < n+512){

			na += 1024;

			s = realloc(s, na+1);

		}

		m = Bread(w->body, s+n, na-n);

		if(m <= 0)

			break;

		n += m;

	}

	s[n] = 0;

	winclosebody(w);

	*np = n;

	return s;

}