ref: 8e6923021fa4d0a6a69e90fc98230401385e9237
dir: /main.c/
#include "inc.h"
RKeyboardctl *kbctl;
Mousectl *mctl;
int scrolling = 1;
char *startdir;
int shiftdown;
int gotscreen;
int servekbd;
Screen *wscreen;
void
killprocs(void)
{
int i;
for(i = 0; i < nwindows; i++)
if(windows[i]->notefd >= 0)
write(windows[i]->notefd, "hangup", 6);
}
/*
* /dev/snarf updates when the file is closed, so we must open our own
* fd here rather than use snarffd
*/
void
putsnarf(void)
{
int fd, i, n;
if(snarffd<0 || nsnarf==0)
return;
fd = open("/dev/snarf", OWRITE|OCEXEC);
if(fd < 0)
return;
/* snarf buffer could be huge, so fprint will truncate; do it in blocks */
for(i=0; i<nsnarf; i+=n){
n = nsnarf-i;
if(n >= 256)
n = 256;
if(fprint(fd, "%.*S", n, snarf+i) < 0)
break;
}
close(fd);
}
void
setsnarf(char *s, int ns)
{
free(snarf);
snarf = runesmprint("%.*s", ns, s);
nsnarf = runestrlen(snarf);
snarfversion++;
}
void
getsnarf(void)
{
int i, n;
char *s, *sn;
if(snarffd < 0)
return;
sn = nil;
i = 0;
seek(snarffd, 0, 0);
for(;;){
if(i > MAXSNARF)
break;
if((s = realloc(sn, i+1024+1)) == nil)
break;
sn = s;
if((n = read(snarffd, sn+i, 1024)) <= 0)
break;
i += n;
}
if(i == 0)
return;
sn[i] = 0;
setsnarf(sn, i);
free(sn);
}
static int overridecursor;
static Cursor *ovcursor;
static Cursor *normalcursor;
Cursor *cursor;
void
setmousecursor(Cursor *c)
{
if(cursor == c)
return;
cursor = c;
setcursor(mctl, c);
}
void
setcursoroverride(Cursor *c, int ov)
{
overridecursor = ov;
ovcursor = c;
setmousecursor(overridecursor ? ovcursor : normalcursor);
}
void
setcursornormal(Cursor *c)
{
normalcursor = c;
setmousecursor(overridecursor ? ovcursor : normalcursor);
}
char *rcargv[] = { "rc", "-i", nil };
Window*
new(Rectangle r)
{
Window *w;
w = wcreate(r, FALSE, scrolling);
assert(w);
if(wincmd(w, 0, nil, rcargv) == 0)
return nil;
return w;
}
void
drainmouse(Mousectl *mc, Window *w)
{
if(w) send(w->mc.c, &mc->Mouse);
while(mc->buttons){
readmouse(mc);
/* stop sending once focus changes.
* buttons released in wfocus() */
if(w != focused) w = nil;
if(w) send(w->mc.c, &mc->Mouse);
}
}
Window*
clickwindow(int but, Mousectl *mc)
{
Window *w;
but = 1<<(but-1);
setcursoroverride(&sightcursor, TRUE);
drainmouse(mc, nil);
while(!(mc->buttons & but)){
readmouse(mc);
if(mc->buttons & (7^but)){
setcursoroverride(nil, FALSE);
drainmouse(mc, nil);
return nil;
}
}
w = wpointto(mc->xy);
return w;
}
Rectangle
dragrect(int but, Rectangle r, Mousectl *mc)
{
Rectangle rc;
Point start, end;
but = 1<<(but-1);
setcursoroverride(&boxcursor, TRUE);
start = mc->xy;
end = mc->xy;
do{
rc = rectaddpt(r, subpt(end, start));
drawgetrect(rc, 1);
readmouse(mc);
drawgetrect(rc, 0);
end = mc->xy;
}while(mc->buttons == but);
setcursoroverride(nil, FALSE);
if(mc->buttons & (7^but)){
rc.min.x = rc.max.x = 0;
rc.min.y = rc.max.y = 0;
drainmouse(mc, nil);
}
return rc;
}
Rectangle
sweeprect(int but, Mousectl *mc)
{
Rectangle r, rc;
but = 1<<(but-1);
setcursoroverride(&crosscursor, TRUE);
drainmouse(mc, nil);
while(!(mc->buttons & but)){
readmouse(mc);
if(mc->buttons & (7^but))
goto Return;
}
r.min = mc->xy;
r.max = mc->xy;
do{
rc = canonrect(r);
drawgetrect(rc, 1);
readmouse(mc);
drawgetrect(rc, 0);
r.max = mc->xy;
}while(mc->buttons == but);
Return:
setcursoroverride(nil, FALSE);
if(mc->buttons & (7^but)){
rc.min.x = rc.max.x = 0;
rc.min.y = rc.max.y = 0;
drainmouse(mc, nil);
}
return rc;
}
int
whichside(int x, int lo, int hi)
{
return x < lo+20 ? 0 :
x > hi-20 ? 2 :
1;
}
/* 0 1 2
* 3 5
* 6 7 8 */
int
whichcorner(Rectangle r, Point p)
{
int i, j;
i = whichside(p.x, r.min.x, r.max.x);
j = whichside(p.y, r.min.y, r.max.y);
return 3*j+i;
}
/* replace corner or edge of rect with point */
Rectangle
changerect(Rectangle r, int corner, Point p)
{
switch(corner){
case 0: return Rect(p.x, p.y, r.max.x, r.max.y);
case 1: return Rect(r.min.x, p.y, r.max.x, r.max.y);
case 2: return Rect(r.min.x, p.y, p.x+1, r.max.y);
case 3: return Rect(p.x, r.min.y, r.max.x, r.max.y);
case 5: return Rect(r.min.x, r.min.y, p.x+1, r.max.y);
case 6: return Rect(p.x, r.min.y, r.max.x, p.y+1);
case 7: return Rect(r.min.x, r.min.y, r.max.x, p.y+1);
case 8: return Rect(r.min.x, r.min.y, p.x+1, p.y+1);
}
return r;
}
Rectangle
bandrect(Rectangle r, int but, Mousectl *mc)
{
Rectangle or, nr;
int corner, ncorner;
or = r;
corner = whichcorner(r, mc->xy);
setcursornormal(corners[corner]);
do{
drawgetrect(r, 1);
readmouse(mc);
drawgetrect(r, 0);
nr = canonrect(changerect(r, corner, mc->xy));
if(goodrect(nr))
r = nr;
ncorner = whichcorner(r, mc->xy);
/* can switch from edge to corner, but not vice versa */
if(ncorner != corner && ncorner != 4 && (corner|~ncorner) & 1){
corner = ncorner;
setcursornormal(corners[corner]);
}
}while(mc->buttons == but);
if(mc->buttons){
drainmouse(mctl, nil);
return or;
}
setcursornormal(nil);
return r;
}
Window*
pick(void)
{
Window *w1, *w2;
w1 = clickwindow(3, mctl);
drainmouse(mctl, nil);
setcursoroverride(nil, FALSE);
w2 = wpointto(mctl->xy);
if(w1 != w2)
return nil;
return w1;
}
void
grab(Window *w)
{
if(w == nil)
w = clickwindow(3, mctl);
if(w == nil)
setcursoroverride(nil, FALSE);
else{
Rectangle r = dragrect(3, w->img->r, mctl);
if(Dx(r) > 0 || Dy(r) > 0){
wmove(w, r.min);
wfocus(w);
flushimage(display, 1);
}
}
}
void
sweep(Window *w)
{
Rectangle r = sweeprect(3, mctl);
if(goodrect(r)){
if(w){
wresize(w, r);
wraise(w);
wfocus(w);
}else{
new(r);
}
flushimage(display, 1);
}
}
void
bandresize(Window *w)
{
Rectangle r;
r = bandrect(w->img->r, mctl->buttons, mctl);
if(!eqrect(r, w->img->r)){
wresize(w, r);
flushimage(display, 1);
}
}
int
obscured(Window *w, Rectangle r, Window *t)
{
if(Dx(r) < font->height || Dy(r) < font->height)
return 1;
if(!rectclip(&r, screen->r))
return 1;
for(; t; t = t->higher){
if(t->hidden || Dx(t->img->r) == 0 || Dy(t->img->r) == 0 || rectXrect(r, t->img->r) == 0)
continue;
if(r.min.y < t->img->r.min.y)
if(!obscured(w, Rect(r.min.x, r.min.y, r.max.x, t->img->r.min.y), t))
return 0;
if(r.min.x < t->img->r.min.x)
if(!obscured(w, Rect(r.min.x, r.min.y, t->img->r.min.x, r.max.y), t))
return 0;
if(r.max.y > t->img->r.max.y)
if(!obscured(w, Rect(r.min.x, t->img->r.max.y, r.max.x, r.max.y), t))
return 0;
if(r.max.x > t->img->r.max.x)
if(!obscured(w, Rect(t->img->r.max.x, r.min.y, r.max.x, r.max.y), t))
return 0;
return 1;
}
return 0;
}
/* Check that newly created window will be of manageable size */
int
goodrect(Rectangle r)
{
if(badrect(r) || !eqrect(canonrect(r), r))
return 0;
/* reasonable sizes only please */
if(Dx(r) > BIG*Dx(screen->r))
return 0;
if(Dy(r) > BIG*Dy(screen->r))
return 0;
/*
* the height has to be big enough to fit one line of text.
* that includes the border on each side with an extra pixel
* so that the text is still drawn
*/
if(Dx(r) < 100 || Dy(r) < 2*(Borderwidth+1)+font->height)
return 0;
/* window must be on screen */
if(!rectXrect(screen->r, r))
return 0;
/* must have some screen and border visible so we can move it out of the way */
if(rectinrect(screen->r, insetrect(r, Borderwidth)))
return 0;
return 1;
}
/* Rectangle for new window */
Rectangle
newrect(void)
{
static int i = 0;
int minx, miny, dx, dy;
dx = min(600, Dx(screen->r) - 2*Borderwidth);
dy = min(400, Dy(screen->r) - 2*Borderwidth);
minx = 32 + 16*i;
miny = 32 + 16*i;
i++;
i %= 10;
return Rect(minx, miny, minx+dx, miny+dy);
}
enum {
Cut,
Paste,
Snarf,
Plumb,
Look,
Send,
Scroll
};
char *menu2str[] = {
"cut",
"paste",
"snarf",
"plumb",
"look",
"send",
"scroll",
nil
};
Menu menu2 = { menu2str };
enum {
New,
Reshape,
Move,
Delete,
Hide,
Exit
};
int Hidden = Exit+1;
char *menu3str[7 + MAXWINDOWS] = {
"New",
"Resize",
"Move",
"Delete",
"Hide",
"Exit",
nil
};
Menu menu3 = { menu3str };
void
btn2menu(Window *w)
{
int sel;
Text *x;
Cursor *c;
x = &w->text;
menu2str[Scroll] = w->scrolling ? "noscroll" : "scroll";
sel = menuhit(2, mctl, &menu2, wscreen);
switch(sel){
case Cut:
xsnarf(x);
xcut(x);
break;
case Paste:
xpaste(x);
break;
case Snarf:
xsnarf(x);
break;
case Plumb:
if(xplumb(x, "lola", w->dir, fsys.msize-1024)){
c = cursor;
setcursoroverride(&query, TRUE);
sleep(300);
setcursoroverride(c, FALSE);
}
break;
case Look:
xlook(x);
break;
case Send:
xsend(x);
break;
case Scroll:
w->scrolling = !w->scrolling;
if(w->scrolling)
xshow(x, x->nr);
break;
}
wsendmsg(w, Wakeup);
}
void
btn3menu(void)
{
static Window *hidden[MAXWINDOWS];
int nhidden;
Window *w, *t;
int i, sel;
nhidden = 0;
for(i = 0; i < nwindows; i++){
t = windows[i];
if(t->hidden || obscured(t, t->img->r, t->higher)){
hidden[nhidden] = windows[i];
menu3str[nhidden+Hidden] = windows[i]->label;
nhidden++;
}
}
menu3str[nhidden+Hidden] = nil;
sel = menuhit(3, mctl, &menu3, wscreen);
switch(sel){
case New:
sweep(nil);
break;
case Reshape:
w = pick();
if(w) sweep(w);
break;
case Move:
grab(nil);
break;
case Delete:
w = pick();
if(w) wdelete(w);
break;
case Hide:
w = pick();
if(w) whide(w);
break;
case Exit:
killprocs();
threadexitsall(nil);
default:
if(sel >= Hidden){
w = hidden[sel-Hidden];
if(w->hidden)
wunhide(w);
else{
wraise(w);
wfocus(w);
}
}
break;
}
}
void
mthread(void*)
{
Window *w;
threadsetname("mousethread");
while(readmouse(mctl) != -1){
w = wpointto(mctl->xy);
cursorwin = w;
again:
if(w == nil){
setcursornormal(nil);
if(mctl->buttons & 4)
btn3menu();
}else if(!ptinrect(mctl->xy, w->contrect)){
/* border */
setcursornormal(corners[whichcorner(w->img->r, mctl->xy)]);
if(mctl->buttons & 7){
wraise(w);
wfocus(w);
if(mctl->buttons & 4)
grab(w);
if(mctl->buttons & 3)
bandresize(w);
}
}else if(w != focused){
wsetcursor(w);
if(mctl->buttons & 7 ||
mctl->buttons & (8|16) && focused->mouseopen){
wraise(w);
wfocus(w);
if(mctl->buttons & 1)
drainmouse(mctl, nil);
else
goto again;
}
}else if(!w->mouseopen){
wsetcursor(w);
if(mctl->buttons && topwin != w)
wraise(w);
if(mctl->buttons & (1|8|16) || ptinrect(mctl->xy, w->text.scrollr))
drainmouse(mctl, w);
if(mctl->buttons & 2){
incref(w);
btn2menu(w);
wrelease(w);
}
if(mctl->buttons & 4)
btn3menu();
}else{
wsetcursor(w);
drainmouse(mctl, w);
}
}
}
void
resthread(void*)
{
Window *w;
Rectangle or, nr;
Point delta;
threadsetname("resizethread");
for(;;){
recvul(mctl->resizec);
or = screen->clipr;
if(getwindow(display, Refnone) < 0)
sysfatal("resize failed: %r");
nr = screen->clipr;
freescrtemps();
freescreen(wscreen);
wscreen = allocscreen(screen, background, 0);
draw(screen, screen->r, background, nil, ZP);
delta = subpt(nr.min, or.min);
for(w = bottomwin; w; w = w->higher)
wresize(w, rectaddpt(w->img->r, delta));
flushimage(display, 1);
}
}
/*
* kbd -----+-------> to tap
* \
* \
* from tap --------+----> window
*/
Channel *opentap; /* open fromtap or totap */
Channel *closetap; /* close fromtap or totap */
Channel *fromtap; /* input from kbd tap program to window */
Channel *totap; /* our keyboard input to tap program */
void
keyboardtap(void*)
{
char *s, *z;
Channel *fschan, *chan;
int n;
Stringpair pair;
Window *cur, *prev;
Queue tapq;
threadsetname("keyboardtap");
fschan = chancreate(sizeof(Stringpair), 0);
enum { Akbd, Afromtap, Atotap, Aopen, Aclose, NALT };
Alt alts[NALT+1] = {
[Akbd] {.c = kbctl->c, .v = &s, .op = CHANRCV},
[Afromtap] {.c = nil, .v = &s, .op = CHANNOP},
[Atotap] {.c = nil, .v = &fschan, .op = CHANNOP},
[Aopen] {.c = opentap, .v = &chan, .op = CHANRCV},
[Aclose] {.c = closetap, .v = &chan, .op = CHANRCV},
[NALT] {.op = CHANEND},
};
memset(&tapq, 0, sizeof(tapq));
cur = nil;
for(;;){
if(alts[Atotap].c && !qempty(&tapq))
alts[Atotap].op = CHANSND;
else
alts[Atotap].op = CHANNOP;
switch(alt(alts)){
case Akbd:
/* from keyboard to tap or to window */
if(*s == 'k' || *s == 'K')
shiftdown = utfrune(s+1, Kshift) != nil;
prev = cur;
cur = focused;
if(totap){
if(cur != prev && cur){
/* notify tap of focus change */
z = smprint("z%d", cur->id);
if(!qadd(&tapq, z))
free(z);
}
/* send to tap */
if(qadd(&tapq, s))
break;
/* tap is wedged, send directly instead */
}
if(cur)
sendp(cur->kbd, s);
else
free(s);
break;
case Afromtap:
/* from tap to window */
if(cur && cur == focused)
sendp(cur->kbd, s);
else
free(s);
break;
case Atotap:
/* send queued up messages */
recv(fschan, &pair);
s = qget(&tapq);
n = strlen(s)+1;
pair.ns = min(n, pair.ns);
memmove(pair.s, s, pair.ns);
free(s);
send(fschan, &pair);
break;
case Aopen:
if(chan == fromtap){
alts[Afromtap].c = fromtap;
alts[Afromtap].op = CHANRCV;
}
if(chan == totap)
alts[Atotap].c = totap;
break;
case Aclose:
if(chan == fromtap){
fromtap = nil;
alts[Afromtap].c = nil;
alts[Afromtap].op = CHANNOP;
// TODO: empty chan
}
if(chan == totap){
totap = nil;
alts[Atotap].c = nil;
alts[Atotap].op = CHANNOP;
while(!qempty(&tapq))
free(qget(&tapq));
}
chanfree(chan);
break;
}
}
}
void
threadmain(int, char *[])
{
char buf[256];
//rfork(RFENVG);
//newwindow("-dx 1280 -dy 800");
if(getwd(buf, sizeof(buf)) == nil)
startdir = estrdup(".");
else
startdir = estrdup(buf);
if(initdraw(nil, nil, "lola") < 0)
sysfatal("initdraw: %r");
kbctl = initkbd(nil, nil);
if(kbctl == nil)
sysfatal("inikeyboard: %r");
mctl = initmouse(nil, screen);
if(mctl == nil)
sysfatal("initmouse: %r");
opentap = chancreate(sizeof(Channel*), 0);
closetap = chancreate(sizeof(Channel*), 0);
servekbd = kbctl->kbdfd >= 0;
snarffd = open("/dev/snarf", OREAD|OCEXEC);
gotscreen = access("/dev/screen", AEXIST)==0;
initdata();
wscreen = allocscreen(screen, background, 0);
draw(screen, screen->r, background, nil, ZP);
timerinit();
threadcreate(mthread, nil, mainstacksize);
threadcreate(resthread, nil, mainstacksize);
threadcreate(keyboardtap, nil, mainstacksize);
flushimage(display, 1);
fs();
// not reached
}