ref: 21336d544ae90e20070fd7c8be67f3f2c9ccbe38
dir: /appl/wm/mash.b/
implement WmMash;
include "sys.m";
sys: Sys;
FileIO: import sys;
include "draw.m";
draw: Draw;
Context: import draw;
include "tk.m";
tk: Tk;
include "tkclient.m";
tkclient: Tkclient;
include "plumbmsg.m";
plumbmsg: Plumbmsg;
Msg: import plumbmsg;
include "workdir.m";
workdir: Workdir;
WmMash: module
{
init: fn(ctxt: ref Draw->Context, args: list of string);
};
Command: module
{
tkinit: fn(ctxt: ref Draw->Context, t: ref Tk->Toplevel, args: list of string);
};
BS: con 8; # ^h backspace character
BSW: con 23; # ^w bacspace word
BSL: con 21; # ^u backspace line
EOT: con 4; # ^d end of file
ESC: con 27; # hold mode
HIWAT: con 2000; # maximum number of lines in transcript
LOWAT: con 1500; # amount to reduce to after high water
Name: con "Mash";
Rdreq: adt
{
off: int;
nbytes: int;
fid: int;
rc: chan of (array of byte, string);
};
shwin_cfg := array[] of {
"menu .m",
".m add command -text Cut -command {send edit cut}",
".m add command -text Paste -command {send edit paste}",
".m add command -text Snarf -command {send edit snarf}",
".m add command -text Send -command {send edit send}",
"frame .b -bd 1 -relief ridge",
"frame .ft -bd 0",
"scrollbar .ft.scroll -width 14 -bd 0 -relief ridge -command {.ft.t yview}",
"text .ft.t -bd 1 -relief flat -width 520 -height 7c -yscrollcommand {.ft.scroll set}",
"pack .ft.scroll -side left -fill y",
"pack .ft.t -fill both -expand 1",
"pack .Wm_t -fill x",
"pack .b -anchor w -fill x",
"pack .ft -fill both -expand 1",
"pack propagate . 0",
"focus .ft.t",
"bind .ft.t <Key> {send keys {%A}}",
"bind .ft.t <Control-d> {send keys {%A}}",
"bind .ft.t <Control-h> {send keys {%A}}",
"bind .ft.t <Button-1> +{grab set .ft.t; send but1 pressed}",
"bind .ft.t <Double-Button-1> +{grab set .ft.t; send but1 pressed}",
"bind .ft.t <ButtonRelease-1> +{grab release .ft.t; send but1 released}",
"bind .ft.t <ButtonPress-2> {send but2 %X %Y}",
"bind .ft.t <Motion-Button-2-Button-1> {}",
"bind .ft.t <Motion-ButtonPress-2> {}",
"bind .ft.t <ButtonPress-3> {send but3 pressed}",
"bind .ft.t <ButtonRelease-3> {send but3 released %x %y}",
"bind .ft.t <Motion-Button-3> {}",
"bind .ft.t <Motion-Button-3-Button-1> {}",
"bind .ft.t <Double-Button-3> {}",
"bind .ft.t <Double-ButtonRelease-3> {}",
"update"
};
rdreq: list of Rdreq;
menuindex := "0";
holding := 0;
plumbed := 0;
rawon := 0;
rawinput := "";
init(ctxt: ref Context, argv: list of string)
{
s: string;
sys = load Sys Sys->PATH;
if (ctxt == nil) {
sys->fprint(sys->fildes(2), "mash: no window context\n");
raise "fail:bad context";
}
draw = load Draw Draw->PATH;
tk = load Tk Tk->PATH;
tkclient = load Tkclient Tkclient->PATH;
plumbmsg = load Plumbmsg Plumbmsg->PATH;
sys->pctl(Sys->FORKNS | Sys->NEWPGRP, nil);
tkclient->init();
if(plumbmsg->init(1, nil, 0) >= 0){
plumbed = 1;
workdir = load Workdir Workdir->PATH;
}
argv = tl argv; # strip off command name
(t, titlectl) := tkclient->toplevel(ctxt, "", Name, Tkclient->Appl);
edit := chan of string;
tk->namechan(t, edit, "edit");
# mash := chan of string;
# tk->namechan(t, mash, "mash");
tkcmds(t, shwin_cfg);
tkclient->onscreen(t, nil);
tkclient->startinput(t, "kbd"::"ptr"::nil);
ioc := chan of (int, ref FileIO, ref FileIO, string);
spawn newsh(ctxt, t, ioc, argv);
(pid, file, filectl, consfile) := <-ioc;
if(file == nil || filectl == nil) {
sys->print("newsh: %r\n");
return;
}
keys := chan of string;
tk->namechan(t, keys, "keys");
but1 := chan of string;
tk->namechan(t, but1, "but1");
but2 := chan of string;
tk->namechan(t, but2, "but2");
but3 := chan of string;
tk->namechan(t, but3, "but3");
button1 := 0;
button3 := 0;
rdrpc: Rdreq;
# outpoint is place in text to insert characters printed by programs
tk->cmd(t, ".ft.t mark set outpoint end; .ft.t mark gravity outpoint left");
for(;;) alt {
c := <-t.ctxt.kbd =>
tk->keyboard(t, c);
c := <-t.ctxt.ptr =>
tk->pointer(t, *c);
c := <-t.ctxt.ctl or
c = <-t.wreq =>
tkclient->wmctl(t, c);
menu := <-titlectl =>
if(menu == "exit") {
kill(pid);
return;
}
tkclient->wmctl(t, menu);
tk->cmd(t, "focus .ft.t");
ecmd := <-edit =>
editor(t, ecmd);
sendinput(t);
tk->cmd(t, "focus .ft.t");
c := <-keys =>
cut(t, 1);
if(rawon) {
rawinput += c[1:2];
rawinput = sendraw(rawinput);
break;
}
char := c[1];
if(char == '\\')
char = c[2];
update := ";.ft.t see insert;update";
case char {
* =>
tk->cmd(t, ".ft.t insert insert "+c+update);
'\n' or EOT =>
tk->cmd(t, ".ft.t insert insert "+c+update);
sendinput(t);
BS =>
tk->cmd(t, ".ft.t tkTextDelIns -c"+update);
BSL =>
tk->cmd(t, ".ft.t tkTextDelIns -l"+update);
BSW =>
tk->cmd(t, ".ft.t tkTextDelIns -w"+update);
ESC =>
holding ^= 1;
color := "blue";
if(!holding){
color = "black";
tkclient->settitle(t, Name);
sendinput(t);
}else
tkclient->settitle(t, Name+" (holding)");
tk->cmd(t, ".ft.t configure -foreground "+color+update);
}
c := <-but1 =>
button1 = (c == "pressed");
button3 = 0; # abort any pending button 3 action
c := <-but2 =>
if(button1){
cut(t, 1);
tk->cmd(t, "update");
break;
}
(nil, l) := sys->tokenize(c, " ");
x := int hd l - 50;
y := int hd tl l - int tk->cmd(t, ".m yposition "+menuindex) - 10;
tk->cmd(t, ".m activate "+menuindex+"; .m post "+string x+" "+string y+
"; grab set .m; update");
button3 = 0; # abort any pending button 3 action
c := <-but3 =>
if(c == "pressed"){
button3 = 1;
if(button1){
paste(t);
tk->cmd(t, "update");
}
break;
}
if(plumbed == 0 || button3 == 0 || button1 != 0)
break;
button3 = 0;
# Plumb message triggered by release of button 3
(nil, l) := sys->tokenize(c, " ");
x := int hd tl l;
y := int hd tl tl l;
index := tk->cmd(t, ".ft.t index @"+string x+","+string y);
selindex := tk->cmd(t, ".ft.t tag ranges sel");
if(selindex != "")
insel := tk->cmd(t, ".ft.t compare sel.first <= "+index)=="1" &&
tk->cmd(t, ".ft.t compare sel.last >= "+index)=="1";
else
insel = 0;
attr := "";
if(insel)
text := tk->cmd(t, ".ft.t get sel.first sel.last");
else{
# have line with text in it
# now extract whitespace-bounded string around click
(nil, w) := sys->tokenize(index, ".");
charno := int hd tl w;
left := tk->cmd(t, ".ft.t index {"+index+" linestart}");
right := tk->cmd(t, ".ft.t index {"+index+" lineend}");
line := tk->cmd(t, ".ft.t get "+left+" "+right);
for(i:=charno; i>0; --i)
if(line[i-1]==' ' || line[i-1]=='\t')
break;
for(j:=charno; j<len line; j++)
if(line[j]==' ' || line[j]=='\t')
break;
text = line[i:j];
attr = "click="+string (charno-i);
}
msg := ref Msg(
"WmSh",
"",
workdir->init(),
"text",
attr,
array of byte text);
if(msg.send() < 0)
sys->fprint(sys->fildes(2), "sh: plumbing write error: %r\n");
rdrpc = <-filectl.read =>
if(rdrpc.rc == nil)
continue;
rdrpc.rc <-= ( nil, "not allowed" );
(nil, data, nil, wc) := <-filectl.write =>
if(wc == nil) {
# consctl closed - revert to cooked mode
rawon = 0;
continue;
}
(nc, cmdlst) := sys->tokenize(string data, " \n");
if(nc == 1) {
case hd cmdlst {
"rawon" =>
rawon = 1;
rawinput = "";
# discard previous input
advance := string (len tk->cmd(t, ".ft.t get outpoint end") +1);
tk->cmd(t, ".ft.t mark set outpoint outpoint+" + advance + "chars");
"rawoff" =>
rawon = 0;
* =>
wc <-= (0, "unknown consctl request");
continue;
}
wc <-= (len data, nil);
continue;
}
wc <-= (0, "unknown consctl request");
rdrpc = <-file.read =>
if(rdrpc.rc == nil) {
(ok, nil) := sys->stat(consfile);
if (ok < 0)
return;
continue;
}
append(rdrpc);
sendinput(t);
(off, data, fid, wc) := <-file.write =>
if(wc == nil) {
(ok, nil) := sys->stat(consfile);
if (ok < 0)
return;
continue;
}
cdata := stripbs(t, string data);
ncdata := string len cdata + "chars;";
moveins := insat(t, "outpoint");
tk->cmd(t, ".ft.t insert outpoint '"+ cdata);
wc <-= (len data, nil);
data = nil;
s = ".ft.t mark set outpoint outpoint+" + ncdata;
s += ".ft.t see outpoint;";
if(moveins)
s += ".ft.t mark set insert insert+" + ncdata;
s += "update";
tk->cmd(t, s);
nlines := int tk->cmd(t, ".ft.t index end");
if(nlines > HIWAT){
s = ".ft.t delete 1.0 "+ string (nlines-LOWAT) +".0;update";
tk->cmd(t, s);
}
}
}
RPCread: type (int, int, int, chan of (array of byte, string));
append(r: RPCread)
{
t := r :: nil;
while(rdreq != nil) {
t = hd rdreq :: t;
rdreq = tl rdreq;
}
rdreq = t;
}
insat(t: ref Tk->Toplevel, mark: string): int
{
return tk->cmd(t, ".ft.t compare insert == "+mark) == "1";
}
insininput(t: ref Tk->Toplevel): int
{
if(tk->cmd(t, ".ft.t compare insert >= outpoint") != "1")
return 0;
return tk->cmd(t, ".ft.t compare {insert linestart} == {outpoint linestart}") == "1";
}
isalnum(s: string): int
{
if(s == "")
return 0;
c := s[0];
if('a' <= c && c <= 'z')
return 1;
if('A' <= c && c <= 'Z')
return 1;
if('0' <= c && c <= '9')
return 1;
if(c == '_')
return 1;
if(c > 16rA0)
return 1;
return 0;
}
stripbs(t: ref Tk->Toplevel, s: string): string
{
l := len s;
for(i := 0; i < l; i++)
if(s[i] == '\b') {
pre := "";
rem := "";
if(i + 1 < l)
rem = s[i+1:];
if(i == 0) { # erase existing character in line
if(tk->cmd(t, ".ft.t get " +
"{outpoint linestart} outpoint") != "")
tk->cmd(t, ".ft.t delete outpoint-1char");
} else {
if(s[i-1] != '\n') # don't erase newlines
i--;
if(i)
pre = s[:i];
}
s = pre + rem;
l = len s;
i = len pre - 1;
}
return s;
}
editor(t: ref Tk->Toplevel, ecmd: string)
{
s, snarf: string;
case ecmd {
"cut" =>
menuindex = "0";
cut(t, 1);
"paste" =>
menuindex = "1";
paste(t);
"snarf" =>
menuindex = "2";
if(tk->cmd(t, ".ft.t tag ranges sel") == "")
break;
snarf = tk->cmd(t, ".ft.t get sel.first sel.last");
tkclient->snarfput(snarf);
"send" =>
menuindex = "3";
if(tk->cmd(t, ".ft.t tag ranges sel") != ""){
snarf = tk->cmd(t, ".ft.t get sel.first sel.last");
tkclient->snarfput(snarf);
}else
snarf = tkclient->snarfget();
if(snarf != "")
s = snarf;
else
return;
if(s[len s-1] != '\n' && s[len s-1] != EOT)
s[len s] = '\n';
tk->cmd(t, ".ft.t see end; .ft.t insert end '"+s);
tk->cmd(t, ".ft.t mark set insert end");
tk->cmd(t, ".ft.t tag remove sel sel.first sel.last");
}
tk->cmd(t, "update");
}
cut(t: ref Tk->Toplevel, snarfit: int)
{
if(tk->cmd(t, ".ft.t tag ranges sel") == "")
return;
if(snarfit)
tkclient->snarfput(tk->cmd(t, ".ft.t get sel.first sel.last"));
tk->cmd(t, ".ft.t delete sel.first sel.last");
}
paste(t: ref Tk->Toplevel)
{
snarf := tkclient->snarfget();
if(snarf == "")
return;
cut(t, 0);
tk->cmd(t, ".ft.t insert insert '"+snarf);
tk->cmd(t, ".ft.t tag add sel insert-"+string len snarf+"chars insert");
sendinput(t);
}
sendinput(t: ref Tk->Toplevel)
{
if(holding)
return;
input := tk->cmd(t, ".ft.t get outpoint end");
slen := len input;
if(slen == 0 || rdreq == nil)
return;
r := hd rdreq;
for(i := 0; i < slen; i++)
if(input[i] == '\n' || input[i] == EOT)
break;
if(i >= slen && slen < r.nbytes)
return;
if(i >= r.nbytes)
i = r.nbytes-1;
advance := string (i+1);
if(input[i] == EOT)
input = input[0:i];
else
input = input[0:i+1];
rdreq = tl rdreq;
alt {
r.rc <-= (array of byte input, "") =>
tk->cmd(t, ".ft.t mark set outpoint outpoint+" + advance + "chars");
* =>
# requester has disappeared; ignore his request and try again
sendinput(t);
}
}
sendraw(input : string) : string
{
i := len input;
if(i == 0 || rdreq == nil)
return input;
r := hd rdreq;
rdreq = tl rdreq;
if(i > r.nbytes)
i = r.nbytes;
alt {
r.rc <-= (array of byte input[0:i], "") =>
input = input[i:];
* =>
;# requester has disappeared; ignore his request and try again
}
return input;
}
newsh(ctxt: ref Context, t: ref Tk->Toplevel, ioc: chan of (int, ref FileIO, ref FileIO, string), args: list of string)
{
pid := sys->pctl(sys->NEWFD, nil);
sh := load Command "/dis/mash.dis";
if(sh == nil) {
ioc <-= (0, nil, nil, nil);
return;
}
tty := "cons."+string pid;
sys->bind("#s","/chan",sys->MBEFORE);
fio := sys->file2chan("/chan", tty);
fioctl := sys->file2chan("/chan", tty + "ctl");
ioc <-= (pid, fio, fioctl, "/chan/"+tty);
if(fio == nil || fioctl == nil)
return;
sys->bind("/chan/"+tty, "/dev/cons", sys->MREPL);
sys->bind("/chan/"+tty+"ctl", "/dev/consctl", sys->MREPL);
fd0 := sys->open("/dev/cons", sys->OREAD|sys->ORCLOSE);
fd1 := sys->open("/dev/cons", sys->OWRITE);
fd2 := sys->open("/dev/cons", sys->OWRITE);
sh->tkinit(ctxt, t, "mash" :: args);
}
kill(pid: int)
{
fd := sys->open("#p/"+string pid+"/ctl", sys->OWRITE);
if(fd != nil)
sys->fprint(fd, "killgrp");
}
tkcmds(t: ref Tk->Toplevel, cfg: array of string)
{
for(i := 0; i < len cfg; i++)
tk->cmd(t, cfg[i]);
}