ref: a2be120ea93ae67447315da268fa336650cd5149
dir: /acme/mail/src/win.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <thread.h>
#include <plumb.h>
#include "dat.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);
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;
w = v;
for(i=0; ; i++){
if(i >= NEVENT)
i = 0;
wingetevent(w, &w->e[i]);
sendp(w->cevent, &w->e[i]);
}
}
static int
winopenfile1(Window *w, char *f, int m)
{
char buf[64];
int fd;
sprint(buf, "/mnt/wsys/%d/%s", w->id, f);
fd = open(buf, m|OCEXEC);
if(fd < 0)
error("can't open window file %s: %r", f);
return fd;
}
int
winopenfile(Window *w, char *f)
{
return winopenfile1(w, f, ORDWR);
}
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);
}
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 = utfnlen(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;
}
char*
winselection(Window *w)
{
int fd, m, n;
char *buf;
char tmp[256];
fd = winopenfile1(w, "rdsel", OREAD);
if(fd < 0)
error("can't open rdsel: %r");
n = 0;
buf = nil;
for(;;){
m = read(fd, tmp, sizeof tmp);
if(m <= 0)
break;
buf = erealloc(buf, n+m+1);
memmove(buf+n, tmp, m);
n += m;
buf[n] = '\0';
}
close(fd);
return buf;
}