1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
implement Chat;
include "sys.m";
sys: Sys;
include "draw.m";
draw: Draw;
include "tk.m";
tk: Tk;
include "tkclient.m";
tkclient: Tkclient;
Chat: module {
init: fn(ctxt: ref Draw->Context, args: list of string);
};
stderr: ref Sys->FD;
tksetup := array [] of {
"frame .f",
"text .f.t -state disabled -wrap word -yscrollcommand {.f.sb set}",
"scrollbar .f.sb -orient vertical -command {.f.t yview}",
"entry .e -bg white",
"bind .e <Key-\n> {send cmd send}",
"pack .f.sb -in .f -side left -fill y",
"pack .f.t -in .f -side left -fill both -expand 1",
"pack .f -side top -fill both -expand 1",
"pack .e -side bottom -fill x",
"pack propagate . 0",
"update",
};
init(ctxt: ref Draw->Context, args: list of string)
{
sys = load Sys Sys->PATH;
sys->pctl(Sys->NEWPGRP, nil);
stderr = sys->fildes(2);
draw = load Draw Draw->PATH;
if (draw == nil)
badmodule(Draw->PATH);
tk = load Tk Tk->PATH;
if (tk == nil)
badmodule(Tk->PATH);
tkclient = load Tkclient Tkclient->PATH;
if (tkclient == nil)
badmodule(Tkclient->PATH);
if (len args < 2) {
sys->fprint(stderr, "usage: chat [servicedir] room\n");
raise "fail:init";
}
args = tl args;
servicedir := "/n/remote/services";
if(len args == 2)
(servicedir, args) = (hd args, tl args);
room := hd args;
tkclient->init();
(win, winctl) := tkclient->toplevel(ctxt, nil, sys->sprint("Chat %s", room), Tkclient->Appl);
cmd := chan of string;
tk->namechan(win, cmd, "cmd");
tkcmds(win, tksetup);
tkcmd(win, ". configure -height 300");
fittoscreen(win);
tkclient->onscreen(win, nil);
tkclient->startinput(win, "kbd"::"ptr"::nil);
msgs := chan of string;
conn := chan of (string, ref Sys->FD);
spawn connect(servicedir, room, msgs, conn);
msgsfd: ref Sys->FD;
for (;;) alt {
(e, fd) := <-conn =>
if (msgsfd == nil) {
if (e == nil) {
output(win, "*** connected");
msgsfd = fd;
} else
output(win, "*** " + e);
} else {
output(win, "*** disconnected");
msgsfd = nil;
}
txt := <-msgs =>
output(win, txt);
<- cmd =>
msg := tkcmd(win, ".e get");
if (msgsfd != nil && msg != nil) {
tkcmd(win, ".f.t see end");
tkcmd(win, ".e delete 0 end");
tkcmd(win, "update");
d := array of byte msg;
sys->write(msgsfd, d, len d);
}
s := <-win.ctxt.kbd =>
tk->keyboard(win, s);
s := <-win.ctxt.ptr =>
tk->pointer(win, *s);
s := <-win.ctxt.ctl or
s = <-win.wreq or
s = <-winctl =>
tkclient->wmctl(win, s);
}
}
err(s: string)
{
sys->fprint(stderr, "chat: %s\n", s);
raise "fail:err";
}
badmodule(path: string)
{
err(sys->sprint("can't load module %s: %r", path));
}
tkcmds(t: ref Tk->Toplevel, cmds: array of string)
{
for (i := 0; i < len cmds; i++)
tkcmd(t, cmds[i]);
}
tkcmd(t: ref Tk->Toplevel, cmd: string): string
{
s := tk->cmd(t, cmd);
if (s != nil && s[0] == '!')
sys->fprint(stderr, "chat: tk error: %s [%s]\n", s, cmd);
return s;
}
connect(dir, name: string, msgs: chan of string, conn: chan of (string, ref Sys->FD))
{
(ctlfd, srvdir, emsg) := opensvc(dir, "chat", name);
if(ctlfd == nil) {
conn <-= (emsg, nil);
return;
}
srvpath := srvdir+"/msgs";
msgsfd := sys->open(srvpath, Sys->ORDWR);
if(msgsfd == nil) {
conn <-= (sys->sprint("internal error: can't open %s: %r", srvpath), nil);
return;
}
conn <-= (nil, msgsfd);
buf := array[Sys->ATOMICIO] of byte;
while((n := sys->read(msgsfd, buf, len buf)) > 0)
msgs <-= string buf[0:n];
conn <-= (nil, nil);
}
opensvc(dir: string, svc: string, name: string): (ref Sys->FD, string, string)
{
ctlfd := sys->open(dir+"/ctl", Sys->ORDWR);
if(ctlfd == nil)
return (nil, nil, sys->sprint("can't open %s/ctl: %r", dir));
if(sys->fprint(ctlfd, "%s %s", svc, name) <= 0)
return (nil, nil, sys->sprint("can't access %s service %s: %r", svc, name));
buf := array [32] of byte;
sys->seek(ctlfd, big 0, Sys->SEEKSTART);
n := sys->read(ctlfd, buf, len buf);
if (n <= 0)
return (nil, nil, sys->sprint("%s/ctl: protocol error: %r", dir));
return (ctlfd, dir+"/"+string buf[0:n], nil);
}
firstmsg := 1;
output(win: ref Tk->Toplevel, txt: string)
{
if (firstmsg)
firstmsg = 0;
else
txt = "\n" + txt;
yview := tkcmd(win, ".f.t yview");
(nil, toks) := sys->tokenize(yview, " ");
toks = tl toks;
tkcmd(win, ".f.t insert end '" + txt);
if (hd toks == "1")
tkcmd(win, ".f.t see end");
tkcmd(win, "update");
}
KEYBOARDH: con 90;
fittoscreen(win: ref Tk->Toplevel)
{
Point, Rect: import draw;
if (win.image == nil || win.image.screen == nil)
return;
r := win.image.screen.image.r;
scrsize := Point((r.max.x - r.min.x), (r.max.y - r.min.y)- KEYBOARDH);
bd := int tkcmd(win, ". cget -bd");
winsize := Point(int tkcmd(win, ". cget -actwidth") + bd * 2, int tkcmd(win, ". cget -actheight") + bd * 2);
if (winsize.x > scrsize.x)
tkcmd(win, ". configure -width " + string (scrsize.x - bd * 2));
if (winsize.y > scrsize.y)
tkcmd(win, ". configure -height " + string (scrsize.y - bd * 2));
actr: Rect;
actr.min = Point(int tkcmd(win, ". cget -actx"), int tkcmd(win, ". cget -acty"));
actr.max = actr.min.add((int tkcmd(win, ". cget -actwidth") + bd*2,
int tkcmd(win, ". cget -actheight") + bd*2));
(dx, dy) := (actr.dx(), actr.dy());
if (actr.max.x > r.max.x)
(actr.min.x, actr.max.x) = (r.min.x - dx, r.max.x - dx);
if (actr.max.y > r.max.y)
(actr.min.y, actr.max.y) = (r.min.y - dy, r.max.y - dy);
if (actr.min.x < r.min.x)
(actr.min.x, actr.max.x) = (r.min.x, r.min.x + dx);
if (actr.min.y < r.min.y)
(actr.min.y, actr.max.y) = (r.min.y, r.min.y + dy);
tkcmd(win, ". configure -x " + string actr.min.x + " -y " + string actr.min.y);
}
|
