ref: fa9f4c5c6852ce467644f610e77504664cb86af4
dir: /appl/wm/samstub.b/
implement Samstub;
include "sys.m";
sys: Sys;
fprint, FD, fildes: import sys;
stderr: ref FD;
include "draw.m";
draw: Draw;
include "samterm.m";
samterm: Samterm;
Text, Menu, Context, Flayer, Section: import samterm;
include "samtk.m";
samtk: Samtk;
panic, whichtext, whichmenu: import samtk;
include "samstub.m";
sendsam: chan of ref Sammsg;
recvsam: chan of ref Sammsg;
snarflen: int;
ctxt: ref Context;
requested: list of (int, int);
tname := array [] of {
"Tversion",
"Tstartcmdfile",
"Tcheck",
"Trequest",
"Torigin",
"Tstartfile",
"Tworkfile",
"Ttype",
"Tcut",
"Tpaste",
"Tsnarf",
"Tstartnewfile",
"Twrite",
"Tclose",
"Tlook",
"Tsearch",
"Tsend",
"Tdclick",
"Tstartsnarf",
"Tsetsnarf",
"Tack",
"Texit",
};
hname := array [] of {
"Hversion",
"Hbindname",
"Hcurrent",
"Hnewname",
"Hmovname",
"Hgrow",
"Hcheck0",
"Hcheck",
"Hunlock",
"Hdata",
"Horigin",
"Hunlockfile",
"Hsetdot",
"Hgrowdata",
"Hmoveto",
"Hclean",
"Hdirty",
"Hcut",
"Hsetpat",
"Hdelname",
"Hclose",
"Hsetsnarf",
"Hsnarflen",
"Hack",
"Hexit",
};
init(c: ref Context)
{
ctxt = c;
sys = load Sys Sys->PATH;
draw = load Draw Draw->PATH;
stderr = fildes(2);
samterm = load Samterm Samterm->PATH;
samtk = load Samtk Samtk->PATH;
samtk->init(ctxt);
requested = nil;
}
start(): (ref Samio, chan of ref Sammsg)
{
sys = load Sys Sys->PATH;
sys->bind("#C", "/", sys->MAFTER);
# Allocate a cmd device
ctl := sys->open("/cmd/clone", sys->ORDWR);
if(ctl == nil) {
fprint(stderr, "can't open /cmd/clone\n");
return (nil, nil);
}
# Find out which one
buf := array[32] of byte;
n := sys->read(ctl, buf, len buf);
if(n <= 0) {
fprint(stderr, "can't read cmd device\n");
return (nil, nil);
}
dir := "/cmd/"+string buf[0:n];
# Start the Command
n = sys->fprint(ctl, "exec "+ SAM);
if(n <= 0) {
fprint(stderr, "can't exec %s\n", SAM);
return (nil, nil);
}
data := sys->open(dir+"/data", sys->ORDWR);
if(data == nil) {
fprint(stderr, "can't open cmd data file\n");
return (nil, nil);
}
sendsam = chan of ref Sammsg;
recvsam = chan of ref Sammsg;
samio := ref Samio(ctl, data, array[1] of byte, 0, 0);
spawn sender(samio, sendsam);
spawn receiver(samio, recvsam);
return (samio, recvsam);
}
sender(samio: ref Samio, c: chan of ref Sammsg)
{
fprint(ctxt.logfd, "sender started\n");
for (;;) {
h := <- c;
if (h == nil) return;
buf := array[3 + len h.mdata] of byte;
buf[0] = byte h.mtype;
buf[1] = byte h.mcount;
buf[2] = byte (h.mcount >> 8);
buf[3:] = h.mdata;
sys->write(samio.data, buf, len buf);
}
}
receiver(samio: ref Samio, msgchan: chan of ref Sammsg)
{
c: int;
fprint(ctxt.logfd, "receiver started\n");
state := 0;
i := 0;
errs := 0;
h: ref Sammsg;
for (;;) {
if (samio.count == 0) {
n := sys->read(samio.data, samio.buffer, len samio.buffer);
if (n <= 0) {
fprint(stderr, "Read error on sam's pipe\n");
return;
}
samio.index = 0;
samio.count = n;
}
samio.count--;
c = int samio.buffer[samio.index++];
case state {
0 =>
h = ref Sammsg(c, 0, nil);
state++;
continue;
1 =>
h.mcount = c;
state++;
continue;
2 =>
h.mcount = h.mcount|(c<<8);
if (h.mcount > DATASIZE || h.mcount < 0)
panic("receiver: count>DATASIZE");
if(h.mcount != 0) {
h.mdata = array[h.mcount] of byte;
i = 0;
state++;
continue;
}
3 =>
h.mdata[i++] = byte c;
if(i < h.mcount){
continue;
}
}
msgchan <- = h;
h = nil;
state = 0;
}
}
inmesg(h: ref Sammsg): int
{
case h.mtype {
Hversion =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hversion: %d\n", m);
Hbindname =>
m := h.inshort(0);
vl := h.invlong(2);
fprint(ctxt.logfd, "Hbindname: %ux, %bux\n", m, vl);
bindname(m, int vl);
Hcurrent =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hcurrent: %d\n", m);
hcurrent(m);
Hmovname =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hmovname: %d, %s\n", m, string h.mdata[2:]);
movename(m, string h.mdata[2:]);
Hgrow =>
m := h.inshort(0);
l1 := h.inlong(2);
l2 := h.inlong(6);
fprint(ctxt.logfd, "Hgrow: %d, %d, %d\n", m, l1, l2);
hgrow(m, l1, l2);
Hnewname =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hnewname: %d\n", m);
newname(m);
Hcheck0 =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hcheck0: %d\n", m);
i := whichmenu(m);
if (i >= 0) {
t := ctxt.menus[i].text;
if (t != nil)
t.lock++;
outTs(Tcheck, m);
}
Hcheck =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hcheck: %d\n", m);
i := whichmenu(m);
if (i >= 0) {
t := ctxt.menus[i].text;
if (t != nil && t.lock)
t.lock--;
hcheck(t);
}
Hunlock =>
fprint(ctxt.logfd, "Hunlock\n");
clrlock();
Hdata =>
m := h.inshort(0);
l := h.inlong(2);
fprint(ctxt.logfd, "Hdata: %d, %d, %s\n",
m, l, contract(string h.mdata[6:]));
hdata(m, l, string h.mdata[6:]);
Horigin =>
m := h.inshort(0);
l := h.inlong(2);
fprint(ctxt.logfd, "Horigin: %d, %d\n", m, l);
horigin(m, l);
Hunlockfile =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hunlockfile: %d\n", m);
clrlock();
Hsetdot =>
m := h.inshort(0);
l1 := h.inlong(2);
l2 := h.inlong(6);
fprint(ctxt.logfd, "Hsetdot: %d, %d, %d\n", m, l1, l2);
hsetdot(m, l1, l2);
Hgrowdata =>
m := h.inshort(0);
l1 := h.inlong(2);
l2 := h.inlong(6);
fprint(ctxt.logfd, "Hgrowdata: %d, %d, %d, %s\n",
m, l1, l2, contract(string h.mdata[10:]));
hgrowdata(m, l1, l2, string h.mdata[10:]);
Hmoveto =>
m := h.inshort(0);
l := h.inlong(2);
fprint(ctxt.logfd, "Hmoveto: %d, %d\n", m, l);
hmoveto(m, l);
Hclean =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hclean: %d\n", m);
hclean(m);
Hdirty =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hdirty: %d\n", m);
hdirty(m);
Hdelname =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hdelname: %d\n", m);
hdelname(m);
Hcut =>
m := h.inshort(0);
l1 := h.inlong(2);
l2 := h.inlong(6);
fprint(ctxt.logfd, "Hcut: %d, %d, %d\n",
m, l1, l2);
hcut(m, l1, l2);
Hclose =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hclose: %d\n", m);
hclose(m);
Hsetpat =>
fprint(ctxt.logfd, "Hsetpat: %s\n", string h.mdata);
samtk->hsetpat(string h.mdata);
Hsetsnarf =>
m := h.inshort(0);
fprint(ctxt.logfd, "Hsetsnarf: %d\n", m);
Hsnarflen =>
snarflen = h.inlong(0);
fprint(ctxt.logfd, "Hsnarflen: %d\n", snarflen);
Hack =>
fprint(ctxt.logfd, "Hack\n");
outT0(Tack);
Hexit =>
fprint(ctxt.logfd, "Hexit\n");
return 1;
-1 =>
panic("rcv error");
* =>
fprint(ctxt.logfd, "type %d\n", h.mtype);
panic("rcv unknown");
}
return 0;
}
Sammsg.inshort(h: self ref Sammsg, n: int): int
{
return ((int h.mdata[n+1])<<8) |
((int h.mdata[n]));
}
Sammsg.inlong(h: self ref Sammsg, n: int): int
{
return ((int h.mdata[n+3])<<24) |
((int h.mdata[n+2])<<16) |
((int h.mdata[n+1])<< 8) |
((int h.mdata[n]));
}
Sammsg.invlong(h: self ref Sammsg, n: int): big
{
return ((big h.mdata[n+7])<<56) |
((big h.mdata[n+6])<<48) |
((big h.mdata[n+5])<<40) |
((big h.mdata[n+4])<<32) |
((big h.mdata[n+3])<<24) |
((big h.mdata[n+2])<<16) |
((big h.mdata[n+1])<< 8) |
((big h.mdata[n]));
}
Sammsg.outcopy(h: self ref Sammsg, pos: int, data: array of byte)
{
h.mdata[pos:] = data;
}
Sammsg.outshort(h: self ref Sammsg, pos: int, s: int)
{
h.mdata[pos++] = byte s;
h.mdata[pos] = byte (s >> 8);
}
Sammsg.outlong(h: self ref Sammsg, pos: int, s: int)
{
h.mdata[pos++] = byte s;
h.mdata[pos++] = byte (s >> 8);
h.mdata[pos++] = byte (s >> 16);
h.mdata[pos] = byte (s >> 24);
}
Sammsg.outvlong(h: self ref Sammsg, pos: int, s: big)
{
h.mdata[pos++] = byte s;
h.mdata[pos++] = byte (s >> 8);
h.mdata[pos++] = byte (s >> 16);
h.mdata[pos++] = byte (s >> 24);
h.mdata[pos++] = byte (s >> 32);
h.mdata[pos++] = byte (s >> 40);
h.mdata[pos++] = byte (s >> 48);
h.mdata[pos] = byte (s >> 56);
}
outT0(t: int)
{
fprint(ctxt.logfd, "\t\t\t\t\t%s\n", tname[t]);
h := ref Sammsg(t, 0, nil);
sendsam <- = h;
}
outTs(t, s: int)
{
fprint(ctxt.logfd, "\t\t\t\t\t%s %ux\n", tname[t], s);
a := array[2] of byte;
h := ref Sammsg(t, 2, a);
h.outshort(0, s);
sendsam <- = h;
}
outTv(t: int, i: big)
{
fprint(ctxt.logfd, "\t\t\t\t\t%s %bux\n", tname[t], i);
a := array[8] of byte;
h := ref Sammsg(t, 8, a);
h.outvlong(0, i);
sendsam <- = h;
}
outTsll(t, m, l1, l2: int)
{ fprint(ctxt.logfd, "\t\t\t\t\t%s %d %d %d\n", tname[t], m, l1, l2);
a := array[10] of byte;
h := ref Sammsg(t, 10, a);
h.outshort(0, m);
h.outlong(2, l1);
h.outlong(6, l2);
sendsam <- = h;
}
outTsl(t, m, l: int)
{ fprint(ctxt.logfd, "\t\t\t\t\t%s %d %d\n", tname[t], m, l);
a := array[6] of byte;
h := ref Sammsg(t, 6, a);
h.outshort(0, m);
h.outlong(2, l);
sendsam <- = h;
}
outTsls(t, m, l1, l2: int)
{ fprint(ctxt.logfd, "\t\t\t\t\t%s %d %d %d\n", tname[t], m, l1, l2);
a := array[8] of byte;
h := ref Sammsg(t, 8, a);
h.outshort(0, m);
h.outlong(2, l1);
h.outshort(6, l2);
sendsam <- = h;
}
outTslS(t, s1, l1: int, s: string)
{
fprint(ctxt.logfd, "\t\t\t\t\t%s %d %d %s\n", tname[t], s1, l1, s);
a := array[6 + len array of byte s] of byte;
h := ref Sammsg(t, len a, a);
h.outshort(0, s1);
h.outlong(2, l1);
h.outcopy(6, array of byte s);
sendsam <- = h;
}
newname(tag: int)
{
menuins(0, "dummy", nil, tag);
}
bindname(tag, l: int)
{
if ((m := whichmenu(tag)) < 0) panic("bindname: whichmenu");
if ((l = whichtext(l)) < 0) panic("bindname: whichtext");
if (ctxt.menus[m].text != nil)
return; # Already bound
t := ctxt.texts[l];
t.tag = tag;
for (fls := t.flayers; fls != nil; fls = tl fls) (hd fls).tag = tag;
ctxt.menus[m].text = t;
}
menuins(m: int, s: string, t: ref Text, tag: int)
{
newmenus := array [len ctxt.menus+1] of ref Menu;
menu := ref Menu(
tag, # tag
s, # name
t # text
);
if (m > 0)
newmenus[0:] = ctxt.menus[0:m];
newmenus[m] = menu;
if (m < len ctxt.menus)
newmenus[m+1:] = ctxt.menus[m:];
ctxt.menus = newmenus;
samtk->menuins(m, s);
}
menudel(m: int)
{
if (len ctxt.menus == 0 || m >= len ctxt.menus || ctxt.menus[m].text != nil)
panic("menudel");
newmenus := array [len ctxt.menus - 1] of ref Menu;
newmenus[0:] = ctxt.menus[0:m];
newmenus[m:] = ctxt.menus[m+1:];
ctxt.menus = newmenus;
samtk->menudel(m);
}
outcmd() {
if(ctxt.work != nil) {
fl := ctxt.work;
outTsll(Tworkfile, fl.tag, fl.dot.first, fl.dot.last);
}
}
hclose(m: int)
{
i: int;
# close LAST window of a file
if((m = whichmenu(m)) < 0) panic("hclose: whichmenu");
t := ctxt.menus[m].text;
if (tl t.flayers != nil) panic("hclose: flayers");
fl := hd t.flayers;
fl.t = nil;
for (i = 0; i< len ctxt.flayers; i++)
if (ctxt.flayers[i] == fl) break;
if (i == len ctxt.flayers) panic("hclose: ctxt.flayers");
samtk->chandel(i);
t.flayers = nil;
for (i = 0; i< len ctxt.texts; i++)
if (ctxt.texts[i] == ctxt.menus[m].text) break;
if (i == len ctxt.texts) panic("hclose: ctxt.texts");
ctxt.texts[i:] = ctxt.texts[i+1:];
ctxt.texts = ctxt.texts[:len ctxt.texts - 1];
ctxt.menus[m].text = nil;
ctxt.which = nil;
samtk->focus(hd ctxt.cmd.flayers);
}
close(win, tag: int)
{
nfls: list of ref Flayer;
if ((m := whichtext(tag)) < 0) panic("close: text");
t := ctxt.texts[m];
if ((m = whichmenu(tag)) < 0) panic("close: menu");
if (len t.flayers == 1) {
outTs(Tclose, tag);
setlock();
return;
}
fl := ctxt.flayers[win];
nfls = nil;
for (fls := t.flayers; fls != nil; fls = tl fls)
if (hd fls != fl) nfls = hd fls :: nfls;
t.flayers = nfls;
samtk->chandel(win);
fl.t = nil;
samtk->settitle(t, ctxt.menus[m].name);
ctxt.which = nil;
}
hdelname(m: int)
{
# close LAST window of a file
if((m = whichmenu(m)) < 0) panic("hdelname: whichmenu");
if (ctxt.menus[m].text != nil) panic("hdelname: text");
ctxt.menus[m:] = ctxt.menus[m+1:];
ctxt.menus = ctxt.menus[:len ctxt.menus - 1];
samtk->menudel(m);
ctxt.which = nil;
}
hdirty(m: int)
{
if((m = whichmenu(m)) < 0) panic("hdirty: whichmenu");
if (ctxt.menus[m].text == nil) panic("hdirty: text");
ctxt.menus[m].text.state |= Samterm->Dirty;
samtk->settitle(ctxt.menus[m].text, ctxt.menus[m].name);
}
hclean(m: int)
{
if((m = whichmenu(m)) < 0) panic("hclean: whichmenu");
if (ctxt.menus[m].text == nil) panic("hclean: text");
ctxt.menus[m].text.state &= ~Samterm->Dirty;
samtk->settitle(ctxt.menus[m].text, ctxt.menus[m].name);
}
movename(tag: int, s: string)
{
i := whichmenu(tag);
if (i < 0) panic("movename: whichmenu");
t := ctxt.menus[i].text;
ctxt.menus[i].text = nil; # suppress panic in menudel
menudel(i);
if(t == ctxt.cmd)
i = 0;
else {
if (len ctxt.menus > 0 && ctxt.menus[0].text == ctxt.cmd)
i = 1;
else
i = 0;
for(; i < len ctxt.menus; i++) {
if (s < ctxt.menus[i].name)
break;
}
}
if (t != nil) samtk->settitle(t, s);
menuins(i, s, t, tag);
}
hcheck(t: ref Text)
{
if (t == nil) {
fprint(ctxt.logfd, "hcheck: no text in menu entry\n");
return;
}
for (fls := t.flayers; fls != nil; fls = tl fls) {
fl := hd fls;
scrollto(fl, fl.scope.first);
}
}
setlock()
{
ctxt.lock++;
samtk->allflayers("cursor -bitmap cursor.wait");
}
clrlock()
{
if (ctxt.lock > 0)
ctxt.lock--;
else
fprint(ctxt.logfd, "lock: wasn't locked\n");
if (ctxt.lock == 0)
samtk->allflayers("cursor -default; update");
}
hcut(m, where, howmuch: int)
{
if((m = whichmenu(m)) < 0) panic("hcut: whichmenu");
t := ctxt.menus[m].text;
if (t == nil) panic("hcut -- no text");
# sctdump(t.sects, "Hcut, before");
t.nrunes -= howmuch;
t.sects = sctdelete(t.sects, where, howmuch);
# sctdump(t.sects, "Hcut, after");
for (fls := t.flayers; fls != nil; fls = tl fls) {
fl := hd fls;
if (where < fl.scope.first) {
if (where + howmuch <= fl.scope.first)
fl.scope.first -= howmuch;
else
fl.scope.first = where;
}
if (where < fl.scope.last) {
if (where + howmuch <= fl.scope.last)
fl.scope.last -= howmuch;
else
fl.scope.last = where;
}
}
}
hgrow(tag, l1, l2: int)
{
if((m := whichmenu(tag)) < 0) panic("hgrow: whichmenu");
t := ctxt.menus[m].text;
grow(t, l1, l2);
}
hdata(m, l: int, s: string)
{
nr: list of (int, int);
if((m = whichmenu(m)) < 0) panic("hdata: whichmenu");
t := ctxt.menus[m].text;
if (t == nil) panic("hdata -- no text");
if (s != "") {
t.sects = sctput(t.sects, l, s);
updatefls(t, l, s);
}
for (nr = nil; requested != nil; requested = tl requested) {
(r1, r2) := hd requested;
if (r1 != m || r2 != l)
nr = (r1, r2) :: nr;
}
requested = nr;
clrlock();
}
hgrowdata(tag, l1, l2: int, s: string)
{
if((m := whichmenu(tag)) < 0) panic("hgrow: whichmenu");
t := ctxt.menus[m].text;
if (t == nil) panic("hdata -- no text");
grow(t, l1, l2);
t.sects = sctput(t.sects, l1, s);
updatefls(t, l1, s);
}
hsetdot(m, l1, l2: int)
{
if((m = whichmenu(m)) < 0) panic("hsetdot: whichmenu");
t := ctxt.menus[m].text;
if (t == nil || t.flayers == nil) panic("hsetdot -- no text");
samtk->setdot(hd t.flayers, l1, l2);
}
hcurrent(tag: int)
{
if ((i := whichmenu(tag)) < 0) panic("hcurrent: whichmenu");
if (ctxt.menus[i].text == nil) {
n := startfile(tag);
ctxt.menus[i].text = ctxt.texts[n];
if (ctxt.menus[i].name != nil)
samtk->settitle(ctxt.texts[n], ctxt.menus[i].name);
}
ctxt.work = hd ctxt.menus[i].text.flayers;
}
hmoveto(m, l: int)
{
if((m = whichmenu(m)) < 0) panic("hmoveto: whichmenu");
t := ctxt.menus[m].text;
fl := hd t.flayers;
if (fl.scope.first <= l &&
(l < fl.scope.last || fl.scope.last == fl.scope.first))
return;
(n, p) := sctrevcnt(t.sects, l, fl.lines/2);
# fprint(ctxt.logfd, "hmoveto: (n, p) = (%d, %d)\n", n, p);
if (n < 0) {
outTsll(Torigin, t.tag, l, fl.lines/2);
setlock();
return;
}
scrollto(fl, p);
}
startcmdfile()
{
t := ctxt.tag++;
n := newtext(t, 1);
ctxt.cmd = ctxt.texts[n];
outTv(Tstartcmdfile, big t);
}
startnewfile()
{
t := ctxt.tag++;
n := newtext(t, 0);
outTv(Tstartnewfile, big t);
}
startfile(tag: int): int
{
n := newtext(tag, 0);
outTv(Tstartfile, big tag);
setlock();
return n;
}
horigin(m, l: int)
{
if((m = whichmenu(m)) < 0) panic("hmoveto: whichmenu");
t := ctxt.menus[m].text;
fl := hd t.flayers;
scrollto(fl, l);
clrlock();
}
scrollto(fl: ref Flayer, where: int)
{
s: string;
n: int;
tag := fl.tag;
if ((i := whichtext(tag)) < 0) panic("scrollto: whichtext");
t := ctxt.texts[i];
samtk->flclear(fl);
(n, s) = sctgetlines(t.sects, where, fl.lines);
fl.scope.first = where;
fl.scope.last = where + len s;
if (s != "")
samtk->flinsert(fl, where, s);
if (n == 0) {
samtk->setscrollbar(t, fl);
} else {
(h, l) := scthole(t, fl.scope.last);
fl.scope.last = h;
if (l > 0)
outrequest(tag, h, l);
else
if (fl.scope.first > t.nrunes) {
fl.scope.first = t.nrunes;
fl.scope.last = t.nrunes;
samtk->setscrollbar(t, fl);
}
}
}
scthole(t: ref Text, f: int): (int, int)
{
p := 0;
h := -1;
l := 0;
for (scts := t.sects; scts != nil; scts = tl scts) {
sct := hd scts;
nr := sct.nrunes;
nt := len sct.text;
if (h >= 0) {
if (sct.text == "") {
l += nr;
if (l >= 512) return (h,512);
} else
return (h,l);
}
if (h < 0 && f < nr) {
if (nt < nr) {
if (f < nt) {
h = p + nt;
l = nr - nt;
} else {
h = p + f;
l = nr - f;
}
if (l >= 512) return (h,512);
}
}
p += sct.nrunes;
f -= sct.nrunes;
}
if (h == -1) return (p, 0);
return (h, l);
}
# return (x, p): x = -1: p -> hole; x = 0: p -> line n; x > 0: p -> eof
sctlinecount(t: ref Text, pos, n: int): (int, int)
{
i: int;
p := 0;
for (scts := t.sects; scts != nil; scts = tl scts) {
sct := hd scts;
nr := sct.nrunes;
nt := len sct.text;
if (pos < nr) {
if (pos > 0) i = pos; else i = 0;
while (i < nt) {
if (sct.text[i++] == '\n') n--;
if (n == 0) return (0, p + i);
}
if (nt < nr) return (-1, p + nt);
}
p += sct.nrunes;
pos -= sct.nrunes;
}
return (n, p);
}
sctrevcnt(scts: list of ref Section, pos, n: int): (int, int)
{
if (scts == nil) return (n, 0);
sct := hd scts;
scts = tl scts;
nt := len sct.text;
nr := sct.nrunes;
if (pos >= nr) {
(n, pos) = sctrevcnt(scts, pos - nr, n);
pos += nr;
}
if (n > 0) {
if (nt < nr && pos > nt)
return(-1, pos);
for (i := pos-1; i >= 0; i--) {
if (sct.text[i] == '\n') n--;
if (n == 0) break;
}
return (n, i + 1);
}
return (n, pos);
}
insertfls(t: ref Text, l: int, s: string)
{
for (fls := t.flayers; fls != nil; fls = tl fls) {
fl := hd fls;
if (l < fl.scope.first || l > fl.scope.last) continue;
samtk->flinsert(fl, l, s);
samtk->setscrollbar(t, fl);
fl.scope.last += len s;
}
}
updatefls(t: ref Text, l: int, s: string)
{
for (fls := t.flayers; fls != nil; fls = tl fls) {
fl := hd fls;
if (l < fl.scope.first || l > fl.scope.last) continue;
samtk->flinsert(fl, l, s);
(x, p) := sctlinecount(t, fl.scope.first, fl.lines);
fl.scope.last = p;
if (x >= 0) {
if (p > l + len s) {
samtk->flinsert(fl, l + len s,
sctget(t.sects, l + len s, p));
}
if (x == 0)
samtk->fldelexcess(fl);
} else {
(h1, h2) := scthole(t, l);
fl.scope.last = h1;
if (h2 > 0) {
outrequest(t.tag, h1, h2);
continue;
} else {
panic("Can't happen ??");
}
}
samtk->setscrollbar(t, fl);
}
}
outrequest(tag, h1, h2: int) {
for (l := requested; l != nil; l = tl l) {
(r1, r2) := hd l;
if (r1 == tag && r2 == h1) return;
}
outTsls(Trequest, tag, h1, h2);
requested = (tag, h1) :: requested;
setlock();
}
deletefls(t: ref Text, pos, nbytes: int)
{
for (fls := t.flayers; fls != nil; fls = tl fls) {
fl := hd fls;
if (pos >= fl.scope.last) continue;
if (pos + nbytes <= fl.scope.first || pos >= fl.scope.last) {
fl.scope.first -= nbytes;
fl.scope.last -= nbytes;
continue;
}
samtk->fldelete(fl, pos, pos + nbytes);
(x, p) := sctlinecount(t, fl.scope.first, fl.lines);
if (x >= 0 && p > fl.scope.last) {
samtk->flinsert(fl, fl.scope.last,
sctget(t.sects, fl.scope.last, p));
fl.scope.last = p;
} else {
fl.scope.last = p;
(h1, h2) := scthole(t, fl.scope.last);
if (h2 > 0)
outrequest(t.tag, h1, h2);
}
samtk->setscrollbar(t, fl);
}
}
contract(s: string): string
{
if (len s < 32)
cs := s;
else
cs = s[0:16] + " ... " + s[len s - 16:];
for (i := 0; i < len cs; i++)
if (cs[i] == '\n') cs[i] = '\u008a';
return cs;
}
cleanout()
{
if ((fl := ctxt.which) == nil) return;
if ((i := whichtext(fl.tag)) < 0) panic("cleanout: whichtext");
t := ctxt.texts[i];
if (fl.typepoint >= 0 && fl.dot.first > fl.typepoint) {
s := sctget(t.sects, fl.typepoint, fl.dot.first);
outTslS(Samstub->Ttype, fl.tag, fl.typepoint, s);
t.state &= ~Samterm->LDirty;
}
fl.typepoint = -1;
}
newtext(tag, tp: int): int
{
n := len ctxt.texts;
t := ref Text(
tag, # tag
0, # lock
samtk->newflayer(tag, tp) :: nil, # flayers
0, # nrunes
nil, # sects
0 # state
);
texts := array [n + 1] of ref Text;
texts[0:] = ctxt.texts;
texts[n] = t;
ctxt.texts = texts;
samtk->newcur(t, hd t.flayers);
return n;
}
keypress(key: string)
{
# Find text and flayer
fl := ctxt.which;
tag := fl.tag;
if ((i := whichtext(tag)) < 0) panic("keypress: whichtext");
t := ctxt.texts[i];
if (fl.dot.last != fl.dot.first) {
cut(t, fl);
}
case (key) {
"\b" =>
if (t.nrunes == 0 || fl.dot.first == 0)
return;
fl.dot.first--;
if (fl.typepoint >= 0 && fl.dot.first >= fl.typepoint) {
t.nrunes -= fl.dot.last - fl.dot.first;
t.sects = sctdelete(t.sects, fl.dot.first, fl.dot.last - fl.dot.first);
deletefls(t, fl.dot.first, fl.dot.last - fl.dot.first);
if (fl.dot.first == fl.typepoint) {
fl.typepoint = -1;
t.state &= ~Samterm->LDirty;
if ((i = whichmenu(tag)) < 0)
panic("keypress: whichmenu");
samtk->settitle(t, ctxt.menus[i].name);
}
} else {
cut(t, fl);
}
* =>
if (fl.typepoint < 0) {
fl.typepoint = fl.dot.first;
t.state |= Samterm->LDirty;
if ((i = whichmenu(tag)) < 0)
panic("keypress: whichmenu");
samtk->settitle(t, ctxt.menus[i].name);
}
if (fl.dot.first > t.nrunes)
panic("keypress -- cursor > file len");
t.sects = sctmakeroom(t.sects, fl.dot.first, len key);
t.nrunes += len key;
t.sects = sctput(t.sects, fl.dot.first, key);
insertfls(t, fl.dot.first, key);
f := fl.dot.first + len key;
samtk->setdot(fl, f, f);
if (key == "\n") {
if (f >= fl.scope.last) {
(n, p) := sctrevcnt(t.sects, f-1, 2*fl.lines/3);
if (n < 0) {
outTsll(Torigin, t.tag, f-1, 2*fl.lines/3);
setlock();
} else {
scrollto(fl, p);
}
}
if (t == ctxt.cmd && fl.dot.last == t.nrunes) {
outcmd();
setlock();
}
cleanout();
}
}
return;
}
cut(t: ref Text, fl: ref Flayer)
{
if (fl.typepoint >= 0) panic("cut: typepoint");
outTsll(Tcut, fl.tag, fl.dot.first, fl.dot.last);
t.nrunes -= fl.dot.last - fl.dot.first;
t.sects = sctdelete(t.sects, fl.dot.first, fl.dot.last - fl.dot.first);
deletefls(t, fl.dot.first, fl.dot.last - fl.dot.first);
}
paste(t: ref Text, fl: ref Flayer)
{
if (fl.typepoint >= 0) panic("paste: typepoint");
if (snarflen == 0) return;
if (fl.dot.first < fl.dot.last) cut(t, fl);
outTsl(Tpaste, fl.tag, fl.dot.first);
}
snarf(nil: ref Text, fl: ref Flayer)
{
if (fl.typepoint >= 0) panic("snarf: typepoint");
if (fl.dot.first == fl.dot.last) return;
snarflen = fl.dot.last - fl.dot.first;
outTsll(Tsnarf, fl.tag, fl.dot.first, fl.dot.last);
}
look(nil: ref Text, fl: ref Flayer)
{
if (fl.typepoint >= 0) panic("look: typepoint");
outTsll(Tlook, fl.tag, fl.dot.first, fl.dot.last);
setlock();
}
send(nil: ref Text, fl: ref Flayer)
{
if (fl.typepoint >= 0) panic("send: typepoint");
outcmd();
outTsll(Tsend, fl.tag, fl.dot.first, fl.dot.last);
setlock();
}
search(nil: ref Text, fl: ref Flayer)
{
if (fl.typepoint >= 0) panic("search: typepoint");
outcmd();
outT0(Tsearch);
setlock();
}
zerox(t: ref Text)
{
fl := samtk->newflayer(t.tag, ctxt.cmd == t);
t.flayers = fl :: t.flayers;
m := whichmenu(t.tag);
samtk->settitle(t, ctxt.menus[m].name);
samtk->newcur(t, fl);
scrollto(fl, 0);
}
sctget(scts: list of ref Section, p1, p2: int): string
{
while (scts != nil) {
sct := hd scts; scts = tl scts;
ln := len sct.text;
if (p1 < sct.nrunes) {
if (ln < sct.nrunes && p2 > ln) {
sctdump(scts, "panic");
panic("sctget - asking for a hole");
}
if (p2 > sct.nrunes) {
s := sct.text[p1:];
return s + sctget(scts, 0, p2 - ln);
}
return sct.text[p1:p2];
}
p1 -= sct.nrunes;
p2 -= sct.nrunes;
}
return "";
}
sctgetlines(scts: list of ref Section, p, n: int): (int, string)
{
s := "";
while (scts != nil) {
sct := hd scts; scts = tl scts;
ln := len sct.text;
if (p < sct.nrunes) {
if (p > ln) return (n, s);
if (p > 0) b := p; else b = 0;
for (i := b; i < ln && n > 0; ) {
if (sct.text[i++] == '\n') n--;
}
if ( i > b)
s = s + sct.text[b:i];
if (n == 0 || ln < sct.nrunes) return (n, s);
}
p -= sct.nrunes;
}
return (n, s);
}
sctput(scts: list of ref Section, pos: int, s: string): list of ref Section
{
# There should be a hole to receive text
if (scts == nil && s != "") panic("sctput: scts is nil\n");
sct := hd scts;
l := len sct.text;
if (sct.nrunes <= pos) {
return sct :: sctput(tl scts, pos-sct.nrunes, s);
}
if (pos < l) {
sctdump(scts, "panic");
panic("sctput: overwriting");
}
if (pos == l) {
if (sct.nrunes < l + len s) {
sct.text += s[:sct.nrunes-l];
return sct :: sctput(tl scts, 0, s[sct.nrunes-l:]);
}
sct.text += s;
return sct :: tl scts;
}
nrunes := sct.nrunes;
sct.nrunes = pos;
if (nrunes < pos + len s)
return sct ::
ref Section(nrunes-pos, s[:nrunes-pos]) ::
sctput(tl scts, 0, s[nrunes-pos:]);
return sct :: ref Section(nrunes-pos, s) :: tl scts;
}
sctmakeroom(scts: list of ref Section, pos: int, l: int): list of ref Section
{
if (scts == nil) {
if (pos) panic("sctmakeroom: beyond end of sections");
return ref Section(l, nil) :: nil;
}
sct := hd scts;
if (sct.nrunes < pos)
return sct :: sctmakeroom(tl scts, pos-sct.nrunes, l);
if (len sct.text <= pos) {
# just add to the hole at end of section
sct.nrunes += l;
return sct :: tl scts;
}
if (pos == 0) {
# text is non-nil!
bsct := ref Section(l, nil);
return bsct :: scts;
}
bsct := ref Section(pos + l, sct.text[0:pos]);
esct := ref Section(sct.nrunes-pos, sct.text[pos:]);
return bsct :: esct :: tl scts;
}
sctdelete(scts: list of ref Section, start, nbytes: int): list of ref Section
{
if (nbytes == 0) return scts;
if (scts == nil) panic("sctdelete: at eof");
sct := hd scts;
scts = tl scts;
nrunes := sct.nrunes;
if (start + nbytes < len sct.text) {
sct.text = sct.text[0:start] + sct.text[start+nbytes:];
sct.nrunes -= nbytes;
return sct :: scts;
}
if (start < nrunes) {
if (start > 0) {
if (start < len sct.text)
sct.text = sct.text[0:start];
if (start + nbytes <= nrunes) {
sct.nrunes -= nbytes;
return sct :: scts;
}
sct.nrunes = start;
return sct :: sctdelete(scts, 0, nbytes-nrunes+start);
}
if (nbytes < nrunes) {
sct.text = "";
sct.nrunes -= nbytes;
return sct :: scts;
}
return sctdelete(scts, 0, nbytes - nrunes);
}
return sct :: sctdelete(scts, start - nrunes, nbytes);
}
grow(t: ref Text, at, l: int)
{
# sctdump(t.sects, "grow, before");
t.sects = sctmakeroom(t.sects, at, l);
t.nrunes += l;
# sctdump(t.sects, "grow, after");
for (fls := t.flayers; fls != nil; fls = tl fls) {
fl := hd fls;
if (at < fl.scope.first) fl.scope.first += l;
if (at < fl.scope.last) fl.scope.last += l;
}
}
findhole(t: ref Text): (int, int)
{
for (fls := t.flayers; fls != nil; fls = tl fls) {
(h, l) := scthole(t, (hd fls).scope.first);
if (l > 0) return (h, l);
}
return (0, 0);
}
sctdump(scts: list of ref Section, s: string)
{
fprint(ctxt.logfd, "Sctdump: %s\n", s);
p := 0;
while (scts != nil) {
sct := hd scts; scts = tl scts;
fprint(ctxt.logfd, "\tsct@%4d len=%4d len txt=%4d: %s\n",
p, sct.nrunes, len sct.text, contract(sct.text));
p += sct.nrunes;
}
fprint(ctxt.logfd, "\tend@%4d\n", p);
}