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implement DMView;
include "sys.m";
include "draw.m";
include "tk.m";
include "tkclient.m";
DMView : module {
init : fn (ctxt : ref Draw->Context, args : list of string);
};
DMPORT : con 9998;
sys : Sys;
draw : Draw;
tk : Tk;
tkclient : Tkclient;
Display, Image, Screen, Point, Rect, Chans : import draw;
display : ref Display;
screen : ref Screen;
init(ctxt : ref Draw->Context, args : list of string)
{
sys = load Sys Sys->PATH;
draw = load Draw Draw->PATH;
tk = load Tk Tk->PATH;
if (tk == nil)
fail(sys->sprint("cannot load %s: %r", Tk->PATH), "init");
tkclient = load Tkclient Tkclient->PATH;
if (tkclient == nil)
fail(sys->sprint("cannot load %s: %r", Tkclient->PATH), "init");
args = tl args;
if (args == nil)
fail("usage: dmview netaddr", "usage");
addr := hd args;
args = tl args;
display = ctxt.display;
screen = ctxt.screen;
tkclient ->init();
(ok, nc) := sys->dial("tcp!"+addr+"!" + string DMPORT, nil);
if (ok < 0)
fail(sys->sprint("could not connect: %r"), "init");
info := array [2 * 12] of byte;
if (sys->read(nc.dfd, info, len info) != len info) {
sys->print("protocol error\n");
return;
}
dispw := int string info[0:12];
disph := int string info[12:24];
info = nil;
(tktop, wmctl) := tkclient->toplevel(ctxt, "", "dmview: "+addr, Tkclient->Hide);
if (tktop == nil)
fail("cannot create window", "init");
cpos := mkframe(tktop, dispw, disph);
winr := Rect((0, 0), (dispw, disph));
newwin := display.newimage(winr, display.image.chans, 0, Draw->White);
# newwin := screen.newwindow(winr, Draw->Refbackup, Draw->White);
if (newwin == nil) {
sys->print("failed to create window: %r\n");
return;
}
tk->putimage(tktop, ".c", newwin, nil);
tk->cmd(tktop, ".c dirty");
tk->cmd(tktop, "update");
winr = winr.addpt(cpos);
newwin.origin(Point(0,0), winr.min);
pubscr := Screen.allocate(newwin, ctxt.display.black, 1);
if (pubscr == nil) {
sys->print("failed to create public screen: %r\n");
return;
}
msg := array of byte sys->sprint("%11d %11s ", pubscr.id, newwin.chans.text());
sys->write(nc.dfd, msg, len msg);
msg = nil;
pidc := chan of int;
spawn srv(nc.dfd, wmctl, pidc);
srvpid := <- pidc;
tkclient->onscreen(tktop, nil);
tkclient->startinput(tktop, nil);
for (;;) {
cmd := <- wmctl;
case cmd {
"srvexit" =>
sys->print("srv exit: %r\n");
srvpid = -1;
"exit" =>
if (srvpid != -1)
kill(srvpid);
return;
"move" =>
newwin.origin(Point(0,0), display.image.r.max);
tkclient->wmctl(tktop, cmd);
x := int tk->cmd(tktop, ".c cget -actx");
y := int tk->cmd(tktop, ".c cget -acty");
newwin.origin(Point(0,0), Point(x, y));
"task" =>
newwin.origin(Point(0,0), display.image.r.max);
tkclient->wmctl(tktop, cmd);
x := int tk->cmd(tktop, ".c cget -actx");
y := int tk->cmd(tktop, ".c cget -acty");
newwin.origin(Point(0,0), Point(x, y));
* =>
tkclient->wmctl(tktop, cmd);
}
}
}
srv(fd : ref Sys->FD, done : chan of string, pidc : chan of int)
{
pidc <-= sys->pctl(Sys->FORKNS, nil);
sys->bind("/dev/draw", "/", Sys->MREPL);
sys->export(fd, "/", Sys->EXPWAIT);
done <-= "srvexit";
}
fail(msg, exc : string)
{
sys->print("%s\n", msg);
raise "fail:"+exc;
}
mkframe(t : ref Tk->Toplevel, w, h : int) : Point
{
tk->cmd(t, "panel .c -width " + string w + " -height " + string h);
tk->cmd(t, "frame .f -borderwidth 3 -relief groove");
tk->cmd(t, "pack .c -in .f");
tk->cmd(t, "pack .f");
tk->cmd(t, "update");
x := int tk->cmd(t, ".c cget -actx");
y := int tk->cmd(t, ".c cget -acty");
return Point(x, y);
}
kill(pid: int)
{
if ((pctl := sys->open("/prog/" + string pid + "/ctl", Sys->OWRITE)) != nil)
sys->fprint(pctl, "kill");
}
tkcmd(t : ref Tk->Toplevel, c : string)
{
s := tk->cmd(t, c);
if (s != nil)
sys->print("%s ERROR: %s\n", c, s);
}
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