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implement Logwindow;
#
# Copyright © 1999 Vita Nuova Limited. All rights reserved.
#
include "sys.m";
sys: Sys;
stderr: ref Sys->FD;
include "draw.m";
draw: Draw;
include "tk.m";
tk: Tk;
cmd: import tk;
include "tkclient.m";
tkclient: Tkclient;
include "arg.m";
Logwindow: module {
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
cfg := array[] of {
"frame .bf",
"checkbutton .bf.scroll -text Scroll -variable scroll -command {send cmd scroll}",
".bf.scroll select",
"checkbutton .bf.popup -text {Pop up} -variable popup -command {send cmd popup}",
".bf.popup select",
"pack .bf.scroll .bf.popup -side left",
"frame .t",
"scrollbar .t.scroll -command {.t.t yview}",
"text .t.t -height 7c -yscrollcommand {.t.scroll set}",
"pack .t.scroll -side left -fill y",
"pack .t.t -fill both -expand 1",
"pack .Wm_t -fill x",
"pack .bf -anchor w",
"pack .t -fill both -expand 1",
"pack propagate . 0",
};
eflag := 0;
badmodule(p: string)
{
sys->fprint(stderr, "logwindow: cannot load %s: %r\n", p);
raise "fail:bad module";
}
init(ctxt: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
stderr = sys->fildes(2);
tkclient = load Tkclient Tkclient->PATH;
if (tkclient == nil)
badmodule(Tkclient->PATH);
tkclient->init();
tk = load Tk Tk->PATH;
if (tk == nil)
badmodule(Tk->PATH);
arg := load Arg Arg->PATH;
if (arg == nil)
badmodule(Arg->PATH);
if (ctxt == nil) {
sys->fprint(stderr, "logwindow: nil Draw->Context\n");
raise "fail:no draw context";
}
gflag := 0;
title := "Log Window";
arg->init(argv);
while ((opt := arg->opt()) != 0) {
case opt {
'e' =>
eflag = 1;
'g' =>
gflag = 1;
* =>
sys->fprint(stderr, "usage: logwindow [-ge] [title]\n");
raise "fail:usage";
}
}
argv = arg->argv();
if (argv != nil)
title = hd argv;
if (!gflag)
sys->pctl(Sys->NEWPGRP, nil);
(top, wmchan) := tkclient->toplevel(ctxt, "", title, Tkclient->Hide|Tkclient->Resize);
if (top == nil) {
sys->fprint(stderr, "logwindow: couldn't make window\n");
raise "fail: no window";
}
cmd(top, ". unmap");
for (c:=0; c<len cfg; c++)
tk->cmd(top, cfg[c]);
if ((err := tk->cmd(top, "variable lasterror")) != nil) {
sys->fprint(stderr, "logwindow: tk error: %s\n", err);
raise "fail: tk error";
}
logwin(sys->fildes(0), top, wmchan);
}
scrolling := 1;
popup := 1;
logwin(fd: ref Sys->FD, top: ref Tk->Toplevel, wmchan: chan of string)
{
cmd := chan of string;
tk->namechan(top, cmd, "cmd");
raised := 0;
ichan := chan of int;
spawn inputmon(fd, top, ichan);
tkclient->onscreen(top, nil);
tkclient->startinput(top, "kbd"::"ptr"::nil);
tkclient->wmctl(top, "task");
for (;;) alt {
s := <-top.ctxt.kbd =>
tk->keyboard(top, s);
s := <-top.ctxt.ptr =>
tk->pointer(top, *s);
s := <-top.ctxt.ctl or
s = <-top.wreq or
s = <-wmchan =>
case s {
"task" =>
raised = 0;
"untask" =>
raised = 1;
}
tkclient->wmctl(top, s);
e := <-ichan =>
if (e == 0 && eflag) {
tkclient->wmctl(top, "exit");
exit;
}
if (!raised && popup)
tkclient->wmctl(top, "untask");
msg := <-cmd =>
case msg {
"scroll" =>
scrolling = int tk->cmd(top, "variable scroll");
"popup" =>
popup = int tk->cmd(top, "variable popup");
}
}
}
inputmon(fd: ref Sys->FD, top: ref Tk->Toplevel, ichan: chan of int)
{
buf := array[Sys->ATOMICIO] of byte;
t := 0;
while ((n := sys->read(fd, buf[t:], len buf-t)) > 0) {
t += n;
cl := 0;
for (i := t - 1; i >= 0; i--) {
(nil, cl, nil) = sys->byte2char(buf, i);
if (cl > 0)
break;
}
if (cl == 0)
continue;
logmsg(top, ichan, string buf[0:i+cl]);
buf[0:] = buf[i+cl:t];
t -= i + cl;
}
if (n < 0)
logmsg(top, ichan, sys->sprint("Input error: %r\n"));
else
logmsg(top, ichan, "Got EOF\n");
if (eflag)
ichan <-= 0;
}
logmsg(top: ref Tk->Toplevel, ichan: chan of int, m: string)
{
tk->cmd(top, ".t.t insert end '"+m);
if (scrolling)
tk->cmd(top, ".t.t see end");
tk->cmd(top, "update");
ichan <-= 1;
}
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