ref: e2a9a31f7a89500cd60233ab9d57dae8fb711543
dir: /gopher.c/
#include <u.h>
#include <libc.h>
#include <String.h>
#include <draw.h>
#include <event.h>
#include <keyboard.h>
#include <panel.h>
#include <bio.h>
#include <plumb.h>
#include "dat.h"
#include "icons.h"
void texthit(Panel *p, int b, Rtext *t);
void message(char *s, ...);
Image *backi;
Image *fwdi;
Image *reloadi;
Panel *root;
Panel *backp;
Panel *fwdp;
Panel *reloadp;
Panel *entryp;
Panel *urlp;
Panel *textp;
Panel *statusp;
Panel *urlp;
char *url;
Mouse *mouse;
Hist *hist = nil;
Link*
mklink(char *addr, char *sel, int type)
{
Link *l;
l = malloc(sizeof *l);
if(l==nil)
sysfatal("malloc: %r");
l->addr = strdup(addr);
l->sel = sel!=nil ? strdup(sel) : nil;
l->type = type;
return l;
}
Link*
clonelink(Link *l)
{
return mklink(l->addr, l->sel, l->type);
}
int
seltype(char c)
{
int t;
t = Tinfo;
switch(c){
case '0': t = Ttext; break;
case '1': t = Tmenu; break;
case '2': t = Tns; break;
case '3': t = Terror; break;
case '4': t = Tbinhex; break;
case '5': t = Tdos; break;
case '6': t = Tuuencoded; break;
case '7': t = Tsearch; break;
case '8': t = Ttelnet; break;
case '9': t = Tbinary; break;
case '+': t = Tmirror; break;
case 'g': t = Tgif; break;
case 'I': t = Timage; break;
case 'T': t = Tt3270; break;
case 'd': t = Tdoc; break;
case 'h': t = Thtml; break;
case 'i': t = Tinfo; break;
case 's': t = Tsound; break;
case '.': t = Teof; break;
default:
fprint(2, "unknown seltype '%c'\n", c);
break;
}
return t;
}
static char *Typestr[] = {
"FILE", "DIR", "NS", "ERR", "HEX",
"DOS", "UU", "?", "TELNET", "BIN",
"MIRROR", "GIF", "IMG", "T3270", "DOC",
"HTML", "", "SND", "EOF",
};
char*
seltypestr(int type)
{
return smprint("%6s", Typestr[type]);
};
Gmenu*
rendermenu(Link *l, Biobuf *bp)
{
char *s, *f[5], *t;
Gmenu *m;
Link *n;
int type;
m = malloc(sizeof *m);
if(m==nil)
sysfatal("malloc: %r");
m->link = clonelink(l);
m->text = nil;
plrtstr(&m->text, 1000000, 0, 0, font, strdup(" "), 0, 0);
for(;;){
n = nil;
s = Brdstr(bp, '\n', 0);
if(s==nil || s[0]=='.')
break;
type = seltype(s[0]);
getfields(s+1, f, 5, 0, "\t\r\n");
switch(type){
case Tinfo:
break;
case Thtml:
n = mklink(strdup(f[1]+4), nil, Thtml); /* +4 skip URL: */
break;
default:
n = mklink(netmkaddr(f[2], "tcp", f[3]), strdup(f[1]), type);
break;
}
t = strdup(f[0]);
plrtstr(&m->text, 1000000, 8, 0, font, seltypestr(type), PL_HEAD, 0);
if(type == Tinfo)
plrtstr(&m->text, 8, 0, 0, font, t, 0, 0);
else
plrtstr(&m->text, 8, 0, 0, font, t, PL_HOT, n);
}
return m;
}
Gmenu*
rendertext(Link *l, Biobuf *bp)
{
Gmenu *m;
String *buf;
int c, n;
m = malloc(sizeof *m);
if(m==nil)
sysfatal("malloc: %r");
m->link = clonelink(l);
m->text = nil;
plrtstr(&m->text, 1000000, 0, 0, font, strdup(" "), 0, 0);
n = 0;
buf = s_new();
for(;;){
c = Bgetc(bp);
if(c<0)
break;
else if(c=='\r' || c=='\n'){
if(c=='\r' && Bgetc(bp)!='\n')
Bungetc(bp);
if(n==1 && s_to_c(buf)[0]=='.')
break;
s_terminate(buf);
plrtstr(&m->text, 1000000, 8, 0, font, strdup(s_to_c(buf)), 0, 0);
s_reset(buf);
n = 0;
}else if(c=='\t'){
n += 4;
s_append(buf, " ");
}else{
n++;
s_putc(buf, c);
}
}
s_free(buf);
return m;
}
Gmenu*
render(Link *l)
{
int fd;
Biobuf *bp;
Gmenu *m;
fd = dial(l->addr, 0, 0, 0);
if(fd < 0){
message("unable to connect to %s: %r", l->addr);
return nil;
}
fprint(fd, "%s\r\n", l->sel);
bp = Bfdopen(fd, OREAD);
if(bp==nil){
close(fd);
sysfatal("bfdopen: %r");
}
switch(l->type){
case Tmenu:
m = rendermenu(l, bp);
break;
case Ttext:
m = rendertext(l, bp);
break;
default:
/* TODO error */
m = nil;
break;
}
Bterm(bp);
close(fd);
return m;
}
void
message(char *s, ...)
{
static char buf[1024];
char *out;
va_list args;
va_start(args, s);
out = buf + vsnprint(buf, sizeof(buf), s, args);
va_end(args);
*out='\0';
plinitlabel(statusp, PACKN|FILLX, buf);
pldraw(statusp, screen);
flushimage(display, 1);
}
char*
linktourl(Link *l)
{
char *f[3], *a, *s;
int n;
a = strdup(l->addr);
n = getfields(a, f, 3, 0, "!");
if(n != 3)
s = smprint("Url: gopher://%s%s", l->addr, l->sel);
else if(atoi(f[2])!=70)
s = smprint("Url: gopher://%s:%s%s", f[1], f[2], l->sel);
else
s = smprint("Url: gopher://%s%s", f[1], l->sel);
free(a);
return s;
}
void
seturl(Link *l)
{
free(url);
url = linktourl(l);
}
void
show(Gmenu *m)
{
plinittextview(textp, PACKE|EXPAND, ZP, m->text, texthit);
pldraw(textp, screen);
plinitlabel(urlp, PACKN|FILLX, url);
pldraw(urlp, screen);
message("gopher!");
}
void
freetext(Rtext *t){
Rtext *tt;
Link *l;
tt = t;
for(; t!=0; t = t->next){
t->b=0;
free(t->text);
t->text = 0;
if(l = t->user){
t->user = 0;
free(l->addr);
if(l->sel!=nil && l->sel[0]!=0)
free(l->sel);
free(l);
}
}
plrtfree(tt);
}
void
freehist(Hist *h)
{
Hist *n;
Gmenu *m;
for(n = h->n; h; h = n){
m = h->m;
freetext(m->text);
if(m->link!=nil){
free(m->link->addr);
free(m->link->sel);
free(m->link);
}
free(h);
}
}
void
visit(Link *l, int sethist)
{
Gmenu *m;
Hist *h;
seturl(l);
message("loading %s...", url);
m = render(l);
if(m==nil)
return;
show(m);
if(!sethist)
return;
h = malloc(sizeof *h);
if(h == nil)
sysfatal("malloc: %r");
/* FIXME
if(hist != nil && hist->n != nil)
freehist(hist->n);
*/
h->p = hist;
h->n = nil;
h->m = m;
hist = h;
}
void
visitaddr(char *addr)
{
visit(mklink(netmkaddr(addr, "tcp", "70"), "", Tmenu), 1);
}
void
plumburl(char *u)
{
int fd;
fd = plumbopen("send", OWRITE|OCEXEC);
if(fd<0)
return;
plumbsendtext(fd, "gopher", nil, nil, u);
close(fd);
}
void
dupfds(int fd, ...)
{
int mfd, n, i;
va_list arg;
Dir *dir;
va_start(arg, fd);
for(mfd = 0; fd >= 0; fd = va_arg(arg, int), mfd++)
if(fd != mfd)
if(dup(fd, mfd) < 0)
sysfatal("dup: %r");
va_end(arg);
if((fd = open("/fd", OREAD)) < 0)
sysfatal("open: %r");
n = dirreadall(fd, &dir);
for(i=0; i<n; i++){
if(strstr(dir[i].name, "ctl"))
continue;
fd = atoi(dir[i].name);
if(fd >= mfd)
close(fd);
}
free(dir);
}
void
page(Link *l)
{
int fd;
fd = dial(l->addr, 0, 0, 0);
if(fd < 0)
sysfatal("dial: %r");
fprint(fd, "%s\r\n", l->sel);
switch(rfork(RFFDG|RFPROC|RFMEM|RFREND|RFNOWAIT|RFNOTEG)){
case -1:
fprint(2, "Can't fork!");
break;
case 0:
dupfds(fd, 1, 2, -1);
execl("/bin/rc", "rc", "-c", "page -w", nil);
_exits(0);
}
close(fd);
}
void
save(Link *l, char *name){
char buf[1024];
int ifd, ofd;
ifd = dial(l->addr, 0, 0, 0);
if(ifd < 0){
message("save: %s: %r", name);
return;
}
fprint(ifd, "%s\r\n", l->sel);
ofd=create(name, OWRITE, 0666);
if(ofd < 0){
message("save: %s: %r", name);
return;
}
switch(rfork(RFNOTEG|RFNAMEG|RFFDG|RFMEM|RFPROC|RFNOWAIT)){
case -1:
message("Can't fork: %r");
break;
case 0:
dup(ifd, 0);
close(ifd);
dup(ofd, 1);
close(ofd);
snprint(buf, sizeof(buf),
"{tput -p || cat} |[2] {aux/statusmsg -k %q >/dev/null || cat >/dev/null}", name);
execl("/bin/rc", "rc", "-c", buf, nil);
exits("exec");
}
close(ifd);
close(ofd);
}
char*
linktofile(Link *l){
char *n, *s;
if(l==nil)
return nil;
n = l->sel;
if(n==nil || n[0]==0)
n = "/";
if(s = strrchr(n, '/'))
n = s+1;
if(n[0]==0)
n = "file";
return n;
}
void
texthit(Panel *p, int b, Rtext *t)
{
Link *l;
char *s, buf[1024] = {0};
USED(p);
if(b!=1)
return;
if(t->user==nil)
return;
l = t->user;
switch(l->type){
case Tmenu:
case Ttext:
visit(l, 1);
break;
case Thtml:
plumburl(l->addr);
break;
case Tdoc:
case Tgif:
case Timage:
page(l);
break;
case Tsearch:
if(eenter("Search:", buf, sizeof buf, mouse)>0){
s = smprint("%s\t%s", l->sel, buf);
visit(mklink(l->addr, s, Tmenu), 1);
free(s);
}
break;
case Tdos:
case Tbinary:
case Tbinhex:
case Tuuencoded:
snprint(buf, sizeof buf, "%s", linktofile(l));
if(eenter("Save as:", buf, sizeof buf, mouse)>0){
save(l, buf);
}
break;
default:
message("unhandled item type '%s'", Typestr[l->type]);
break;
}
}
void
backhit(Panel *p, int b)
{
USED(p);
if(b!=1)
return;
if(hist==nil || hist->p==nil)
return;
hist->p->n = hist;
hist = hist->p;
seturl(hist->m->link);
show(hist->m);
}
void
nexthit(Panel *p, int b)
{
USED(p);
if(b!=1)
return;
if(hist==nil || hist->n==nil)
return;
hist = hist->n;
seturl(hist->m->link);
show(hist->m);
}
void
reloadhit(Panel *p, int b)
{
USED(p);
if(b!=1)
return;
visit(hist->m->link, 0);
}
void
entryhit(Panel *p, char *t)
{
USED(p);
switch(strlen(t)){
case 0:
return;
case 1:
switch(*t){
case 'b':
backhit(backp, 1);
break;
case 'n':
nexthit(fwdp, 1);
break;
case 'q':
exits(nil);
break;
default:
message("unknown command %s", t);
break;
}
break;
default:
visitaddr(t);
}
plinitentry(p, PACKN|FILLX, 0, "", entryhit);
pldraw(p, screen);
}
void
mkpanels(void)
{
Panel *p, *ybar, *xbar;
root = plgroup(0, EXPAND);
p = plgroup(root, PACKN|FILLX);
statusp = pllabel(p, PACKN|FILLX, "gopher!");
plplacelabel(statusp, PLACEW);
plbutton(p, PACKW|BITMAP|NOBORDER, backi, backhit);
plbutton(p, PACKW|BITMAP|NOBORDER, fwdi, nexthit);
plbutton(p, PACKW|BITMAP|NOBORDER, reloadi, reloadhit);
pllabel(p, PACKW, "Go:");
entryp = plentry(p, PACKN|FILLX, 0, "", entryhit);
p = plgroup(root, PACKN|FILLX);
urlp = pllabel(p, PACKN|FILLX, "");
plplacelabel(urlp, PLACEW);
p = plgroup(root, PACKN|EXPAND);
ybar = plscrollbar(p, PACKW|USERFL);
xbar = plscrollbar(p, IGNORE);
textp = pltextview(p, PACKE|EXPAND, ZP, nil, nil);
plscroll(textp, xbar, ybar);
plgrabkb(entryp);
}
void
eresized(int new)
{
if(new && getwindow(display, Refnone)<0)
sysfatal("cannot reattach: %r");
plpack(root, screen->r);
pldraw(root, screen);
}
Image*
loadicon(Rectangle r, uchar *data, int ndata)
{
Image *i;
int n;
i = allocimage(display, r, RGBA32, 0, DNofill);
if(i==nil)
sysfatal("allocimage: %r");
n = loadimage(i, r, data, ndata);
if(n<0)
sysfatal("loadimage: %r");
return i;
}
void
loadicons(void)
{
Rectangle r = Rect(0,0,16,16);
backi = loadicon(r, ibackdata, sizeof ibackdata);
fwdi = loadicon(r, ifwddata, sizeof ifwddata);
reloadi = loadicon(r, ireloaddata, sizeof ireloaddata);
}
void scrolltext(int dy, int whence)
{
Scroll s;
s = plgetscroll(textp);
switch(whence){
case 0:
s.pos.y = dy;
break;
case 1:
s.pos.y += dy;
break;
case 2:
s.pos.y = s.size.y+dy;
break;
}
if(s.pos.y > s.size.y)
s.pos.y = s.size.y;
if(s.pos.y < 0)
s.pos.y = 0;
plsetscroll(textp, s);
/* BUG: there is a redraw issue when scrolling
This fixes the issue albeit not properly */
pldraw(textp, screen);
}
void
main(int argc, char *argv[])
{
Event e;
char *url;
if(argc == 2)
url = argv[1];
else
url = "gopher.floodgap.com";
quotefmtinstall();
if(initdraw(nil, nil, "gopher")<0)
sysfatal("initdraw: %r");
einit(Emouse|Ekeyboard);
plinit(screen->depth);
loadicons();
mkpanels();
visitaddr(url);
eresized(0);
for(;;){
switch(event(&e)){
case Ekeyboard:
switch(e.kbdc){
default:
plgrabkb(entryp);
plkeyboard(e.kbdc);
break;
case Khome:
scrolltext(0, 0);
break;
case Kup:
scrolltext(-textp->size.y/4, 1);
break;
case Kpgup:
scrolltext(-textp->size.y/2, 1);
break;
case Kdown:
scrolltext(textp->size.y/4, 1);
break;
case Kpgdown:
scrolltext(textp->size.y/2, 1);
break;
case Kend:
scrolltext(-textp->size.y, 2);
break;
case Kdel:
exits(nil);
break;
}
break;
case Emouse:
mouse = &e.mouse;
if(mouse->buttons & (8|16) && ptinrect(mouse->xy, textp->r)){
if(mouse->buttons & 8)
scrolltext(textp->r.min.y - mouse->xy.y, 1);
else
scrolltext(mouse->xy.y - textp->r.min.y, 1);
break;
}
plmouse(root, mouse);
/* BUG: there is a redraw issue when scrolling
This fixes the issue albeit not properly */
pldraw(textp, screen);
break;
}
}
}