ref: 39c3fd117ab4988c041800490b23c2aedb1858d3
dir: /sys/src/cmd/rio/wind.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <cursor.h>
#include <mouse.h>
#include <keyboard.h>
#include <frame.h>
#include <fcall.h>
#include <plumb.h>
#include <complete.h>
#include "dat.h"
#include "fns.h"
enum
{
HiWater = 640000, /* max size of history */
LoWater = 400000, /* min size of history after max'ed */
MinWater = 20000, /* room to leave available when reallocating */
};
static int topped;
static int id;
static Cursor *lastcursor;
Window*
wmk(Image *i, Mousectl *mc, Channel *ck, Channel *cctl, int scrolling)
{
Window *w;
Rectangle r;
w = emalloc(sizeof(Window));
w->screenr = i->r;
r = insetrect(i->r, Selborder+1);
w->i = i;
w->mc = *mc;
w->ck = ck;
w->cctl = cctl;
w->cursorp = nil;
w->conswrite = chancreate(sizeof(Conswritemesg), 0);
w->consread = chancreate(sizeof(Consreadmesg), 0);
w->kbdread = chancreate(sizeof(Consreadmesg), 0);
w->mouseread = chancreate(sizeof(Mousereadmesg), 0);
w->wctlread = chancreate(sizeof(Consreadmesg), 0);
w->complete = chancreate(sizeof(Completion*), 0);
w->gone = chancreate(sizeof(char*), 0);
w->scrollr = r;
w->scrollr.max.x = r.min.x+Scrollwid;
w->lastsr = ZR;
r.min.x += Scrollwid+Scrollgap;
frinit(w, r, font, i, cols);
w->maxtab = maxtab*stringwidth(font, "0");
w->topped = ++topped;
w->id = ++id;
w->notefd = -1;
w->scrolling = scrolling;
w->dir = estrdup(startdir);
w->label = estrdup("<unnamed>");
r = insetrect(w->i->r, Selborder);
draw(w->i, r, cols[BACK], nil, w->entire.min);
wborder(w, Selborder);
wscrdraw(w);
incref(w); /* ref will be removed after mounting; avoids delete before ready to be deleted */
return w;
}
void
wsetname(Window *w)
{
int i, n;
char err[ERRMAX];
n = snprint(w->name, sizeof(w->name)-2, "window.%d.%d", w->id, w->namecount++);
for(i='A'; i<='Z'; i++){
if(nameimage(w->i, w->name, 1) > 0)
return;
errstr(err, sizeof err);
if(strcmp(err, "image name in use") != 0)
break;
w->name[n] = i;
w->name[n+1] = 0;
}
w->name[0] = 0;
fprint(2, "rio: setname failed: %s\n", err);
}
void
wresize(Window *w, Image *i)
{
Rectangle r;
wclosewin(w);
w->i = i;
w->mc.image = i;
r = insetrect(i->r, Selborder+1);
w->scrollr = r;
w->scrollr.max.x = r.min.x+Scrollwid;
w->lastsr = ZR;
r.min.x += Scrollwid+Scrollgap;
frclear(w, FALSE);
frinit(w, r, w->font, w->i, cols);
wsetcols(w, 1);
w->maxtab = maxtab*stringwidth(w->font, "0");
r = insetrect(w->i->r, Selborder);
draw(w->i, r, cols[BACK], nil, w->entire.min);
wfill(w);
wsetselect(w, w->q0, w->q1);
wscrdraw(w);
wborder(w, Selborder);
flushimage(display, 1);
wsetname(w);
w->topped = ++topped;
w->resized = TRUE;
w->mouse.counter++;
w->wctlready = 1;
}
void
wrefresh(Window *w)
{
Rectangle r;
if(w == input)
wborder(w, Selborder);
else
wborder(w, Unselborder);
r = insetrect(w->i->r, Selborder);
draw(w->i, r, w->cols[BACK], nil, w->entire.min);
w->ticked = 0;
if(w->p0 > 0)
frdrawsel(w, frptofchar(w, 0), 0, w->p0, 0);
if(w->p1 < w->nchars)
frdrawsel(w, frptofchar(w, w->p1), w->p1, w->nchars, 0);
frdrawsel(w, frptofchar(w, w->p0), w->p0, w->p1, 1);
w->lastsr = ZR;
wscrdraw(w);
}
int
wclose(Window *w)
{
int i;
i = decref(w);
if(i > 0)
return 0;
if(i < 0)
error("negative ref count");
wclunk(w);
wsendctlmesg(w, Exited, ZR, nil);
return 1;
}
void
showcandidates(Window *, Completion *);
void
winctl(void *arg)
{
Rune *rp, *up, r;
uint qh, q0;
int nr, nb, c, wid, i, npart, initial, lastb;
char *s, *t, part[3];
Window *w;
Mousestate *mp, m;
enum { WKbd, WKbdread, WMouse, WMouseread, WCtl, WCwrite, WCread, WWread, WComplete, Wgone, NWALT };
Alt alts[NWALT+1];
Consreadmesg crm;
Mousereadmesg mrm;
Conswritemesg cwm;
Stringpair pair;
Wctlmesg wcm;
Completion *cr;
char *kbdq[32], *kbds;
uint kbdqr, kbdqw;
w = arg;
threadsetname("winctl-id%d", w->id);
mrm.cm = chancreate(sizeof(Mouse), 0);
crm.c1 = chancreate(sizeof(Stringpair), 0);
crm.c2 = chancreate(sizeof(Stringpair), 0);
cwm.cw = chancreate(sizeof(Stringpair), 0);
alts[WKbd].c = w->ck;
alts[WKbd].v = &kbds;
alts[WKbd].op = CHANRCV;
alts[WKbdread].c = w->kbdread;
alts[WKbdread].v = &crm;
alts[WKbdread].op = CHANSND;
alts[WMouse].c = w->mc.c;
alts[WMouse].v = &w->mc.Mouse;
alts[WMouse].op = CHANRCV;
alts[WMouseread].c = w->mouseread;
alts[WMouseread].v = &mrm;
alts[WMouseread].op = CHANSND;
alts[WCtl].c = w->cctl;
alts[WCtl].v = &wcm;
alts[WCtl].op = CHANRCV;
alts[WCwrite].c = w->conswrite;
alts[WCwrite].v = &cwm;
alts[WCwrite].op = CHANSND;
alts[WCread].c = w->consread;
alts[WCread].v = &crm;
alts[WCread].op = CHANSND;
alts[WWread].c = w->wctlread;
alts[WWread].v = &crm;
alts[WWread].op = CHANSND;
alts[WComplete].c = w->complete;
alts[WComplete].v = &cr;
alts[WComplete].op = CHANRCV;
alts[Wgone].c = w->gone;
alts[Wgone].v = "window deleted";
alts[Wgone].op = CHANNOP;
alts[NWALT].op = CHANEND;
kbdqr = kbdqw = 0;
npart = 0;
lastb = -1;
for(;;){
if(w->i==nil){
/* window deleted */
alts[Wgone].op = CHANSND;
alts[WKbdread].op = CHANNOP;
alts[WMouseread].op = CHANNOP;
alts[WCwrite].op = CHANNOP;
alts[WWread].op = CHANNOP;
alts[WCread].op = CHANNOP;
} else {
alts[WKbdread].op = (w->kbdopen && kbdqw != kbdqr) ?
CHANSND : CHANNOP;
alts[WMouseread].op = (w->mouseopen && w->mouse.counter != w->mouse.lastcounter) ?
CHANSND : CHANNOP;
alts[WCwrite].op = w->scrolling || w->mouseopen || (w->qh <= w->org+w->nchars) ?
CHANSND : CHANNOP;
alts[WWread].op = w->wctlready ?
CHANSND : CHANNOP;
/* this code depends on NL and EOT fitting in a single byte */
/* kind of expensive for each loop; worth precomputing? */
if(w->holding)
alts[WCread].op = CHANNOP;
else if(npart || (w->rawing && w->nraw>0))
alts[WCread].op = CHANSND;
else{
alts[WCread].op = CHANNOP;
for(i=w->qh; i<w->nr; i++){
c = w->r[i];
if(c=='\n' || c=='\004'){
alts[WCread].op = CHANSND;
break;
}
}
}
}
switch(alt(alts)){
case WKbd:
if(kbdqw - kbdqr < nelem(kbdq))
kbdq[kbdqw++ % nelem(kbdq)] = kbds;
else
free(kbds);
if(w->kbdopen)
continue;
while(kbdqr != kbdqw){
kbds = kbdq[kbdqr++ % nelem(kbdq)];
if(*kbds == 'c'){
chartorune(&r, kbds+1);
if(r)
wkeyctl(w, r);
}
free(kbds);
}
break;
case WKbdread:
recv(crm.c1, &pair);
nb = 0;
while(kbdqr != kbdqw){
kbds = kbdq[kbdqr % nelem(kbdq)];
i = strlen(kbds)+1;
if(nb+i > pair.ns)
break;
memmove((char*)pair.s + nb, kbds, i);
free(kbds);
nb += i;
kbdqr++;
}
pair.ns = nb;
send(crm.c2, &pair);
continue;
case WMouse:
if(w->mouseopen) {
w->mouse.counter++;
/* queue click events */
if(!w->mouse.qfull && lastb != w->mc.buttons) { /* add to ring */
mp = &w->mouse.queue[w->mouse.wi];
if(++w->mouse.wi == nelem(w->mouse.queue))
w->mouse.wi = 0;
if(w->mouse.wi == w->mouse.ri)
w->mouse.qfull = TRUE;
mp->Mouse = w->mc;
mp->counter = w->mouse.counter;
lastb = w->mc.buttons;
}
} else
wmousectl(w);
break;
case WMouseread:
/* send a queued event or, if the queue is empty, the current state */
/* if the queue has filled, we discard all the events it contained. */
/* the intent is to discard frantic clicking by the user during long latencies. */
w->mouse.qfull = FALSE;
if(w->mouse.wi != w->mouse.ri) {
m = w->mouse.queue[w->mouse.ri];
if(++w->mouse.ri == nelem(w->mouse.queue))
w->mouse.ri = 0;
} else
m = (Mousestate){w->mc.Mouse, w->mouse.counter};
w->mouse.lastcounter = m.counter;
send(mrm.cm, &m.Mouse);
continue;
case WCtl:
if(wctlmesg(w, wcm.type, wcm.r, wcm.p) == Exited){
while(kbdqr != kbdqw)
free(kbdq[kbdqr++ % nelem(kbdq)]);
chanfree(crm.c1);
chanfree(crm.c2);
chanfree(mrm.cm);
chanfree(cwm.cw);
threadexits(nil);
}
continue;
case WCwrite:
recv(cwm.cw, &pair);
rp = pair.s;
nr = pair.ns;
for(i=0; i<nr; i++)
if(rp[i] == '\b'){
up = rp+i;
initial = 0;
for(; i<nr; i++){
if(rp[i] == '\b'){
if(up == rp)
initial++;
else
up--;
}else
*up++ = rp[i];
}
if(initial){
if(initial > w->qh)
initial = w->qh;
qh = w->qh-initial;
wdelete(w, qh, qh+initial);
w->qh = qh;
}
nr = up - rp;
break;
}
w->qh = winsert(w, rp, nr, w->qh)+nr;
if(w->scrolling || w->mouseopen)
wshow(w, w->qh);
wsetselect(w, w->q0, w->q1);
wscrdraw(w);
free(rp);
break;
case WCread:
recv(crm.c1, &pair);
t = pair.s;
nb = pair.ns;
i = npart;
npart = 0;
if(i)
memmove(t, part, i);
while(i<nb && (w->qh<w->nr || w->nraw>0)){
if(w->qh == w->nr){
wid = runetochar(t+i, &w->raw[0]);
w->nraw--;
runemove(w->raw, w->raw+1, w->nraw);
}else
wid = runetochar(t+i, &w->r[w->qh++]);
c = t[i]; /* knows break characters fit in a byte */
i += wid;
if(!w->rawing && (c == '\n' || c=='\004')){
if(c == '\004')
i--;
break;
}
}
if(i==nb && w->qh<w->nr && w->r[w->qh]=='\004')
w->qh++;
if(i > nb){
npart = i-nb;
memmove(part, t+nb, npart);
i = nb;
}
pair.s = t;
pair.ns = i;
send(crm.c2, &pair);
continue;
case WWread:
w->wctlready = 0;
recv(crm.c1, &pair);
s = Dx(w->screenr) > 0 ? "visible" : "hidden";
t = "notcurrent";
if(w == input)
t = "current";
pair.ns = snprint(pair.s, pair.ns+1, "%11d %11d %11d %11d %11s %11s ",
w->i->r.min.x, w->i->r.min.y, w->i->r.max.x, w->i->r.max.y, t, s);
send(crm.c2, &pair);
continue;
case WComplete:
if(w->i!=nil){
if(!cr->advance)
showcandidates(w, cr);
if(cr->advance){
rp = runesmprint("%s", cr->string);
if(rp){
nr = runestrlen(rp);
q0 = w->q0;
q0 = winsert(w, rp, nr, q0);
wshow(w, q0+nr);
free(rp);
}
}
}
freecompletion(cr);
break;
}
if(w->i!=nil && Dx(w->screenr) > 0 && display->bufp > display->buf)
flushimage(display, 1);
}
}
void
waddraw(Window *w, Rune *r, int nr)
{
w->raw = runerealloc(w->raw, w->nraw+nr);
runemove(w->raw+w->nraw, r, nr);
w->nraw += nr;
}
/*
* Need to do this in a separate proc because if process we're interrupting
* is dying and trying to print tombstone, kernel is blocked holding p->debug lock.
*/
void
interruptproc(void *v)
{
int *notefd;
notefd = v;
write(*notefd, "interrupt", 9);
close(*notefd);
free(notefd);
}
int
windfilewidth(Window *w, uint q0, int oneelement)
{
uint q;
Rune r;
q = q0;
while(q > 0){
r = w->r[q-1];
if(r<=' ' || r=='=' || r=='^' || r=='(' || r=='{')
break;
if(oneelement && r=='/')
break;
--q;
}
return q0-q;
}
void
showcandidates(Window *w, Completion *c)
{
int i;
Fmt f;
Rune *rp;
uint nr, qline;
char *s;
runefmtstrinit(&f);
if (c->nmatch == 0)
s = "[no matches in ";
else
s = "[";
if(c->nfile > 32)
fmtprint(&f, "%s%d files]\n", s, c->nfile);
else{
fmtprint(&f, "%s", s);
for(i=0; i<c->nfile; i++){
if(i > 0)
fmtprint(&f, " ");
fmtprint(&f, "%s", c->filename[i]);
}
fmtprint(&f, "]\n");
}
rp = runefmtstrflush(&f);
nr = runestrlen(rp);
/* place text at beginning of line before cursor and host point */
qline = min(w->qh, w->q0);
while(qline>0 && w->r[qline-1] != '\n')
qline--;
if(qline == w->qh){
/* advance host point to avoid readback */
w->qh = winsert(w, rp, nr, qline)+nr;
} else {
winsert(w, rp, nr, qline);
}
free(rp);
}
typedef struct Completejob Completejob;
struct Completejob
{
char *dir;
char *str;
Window *win;
};
void
completeproc(void *arg)
{
Completejob *job;
Completion *c;
job = arg;
threadsetname("namecomplete %s", job->dir);
c = complete(job->dir, job->str);
if(c != nil && sendp(job->win->complete, c) <= 0)
freecompletion(c);
wclose(job->win);
free(job->dir);
free(job->str);
free(job);
}
void
namecomplete(Window *w)
{
int nstr, npath;
Rune *path, *str;
char *dir, *root;
Completejob *job;
/* control-f: filename completion; works back to white space or / */
if(w->q0<w->nr && w->r[w->q0]>' ') /* must be at end of word */
return;
nstr = windfilewidth(w, w->q0, TRUE);
str = w->r+(w->q0-nstr);
npath = windfilewidth(w, w->q0-nstr, FALSE);
path = w->r+(w->q0-nstr-npath);
/* is path rooted? if not, we need to make it relative to window path */
if(npath>0 && path[0]=='/')
dir = runetobyte(path, npath, &npath);
else {
if(strcmp(w->dir, "") == 0)
root = ".";
else
root = w->dir;
dir = smprint("%s/%.*S", root, npath, path);
}
if(dir == nil)
return;
/* run in background, winctl will collect the result on w->complete chan */
job = emalloc(sizeof *job);
job->str = runetobyte(str, nstr, &nstr);
job->dir = cleanname(dir);
job->win = w;
incref(w);
proccreate(completeproc, job, STACK);
}
void
wkeyctl(Window *w, Rune r)
{
uint q0 ,q1;
int n, nb;
int *notefd;
switch(r){
case 0:
case Kcaps:
case Knum:
case Kshift:
case Kalt:
case Kctl:
case Kaltgr:
return;
}
if(w->i==nil)
return;
/* navigation keys work only when mouse and kbd is not open */
if(!w->mouseopen)
switch(r){
case Kdown:
n = shiftdown ? 1 : w->maxlines/3;
goto case_Down;
case Kscrollonedown:
n = mousescrollsize(w->maxlines);
if(n <= 0)
n = 1;
goto case_Down;
case Kpgdown:
n = 2*w->maxlines/3;
case_Down:
q0 = w->org+frcharofpt(w, Pt(w->Frame.r.min.x, w->Frame.r.min.y+n*w->font->height));
wsetorigin(w, q0, TRUE);
return;
case Kup:
n = shiftdown ? 1 : w->maxlines/3;
goto case_Up;
case Kscrolloneup:
n = mousescrollsize(w->maxlines);
if(n <= 0)
n = 1;
goto case_Up;
case Kpgup:
n = 2*w->maxlines/3;
case_Up:
q0 = wbacknl(w, w->org, n);
wsetorigin(w, q0, TRUE);
return;
case Kleft:
if(w->q0 > 0){
q0 = w->q0-1;
wsetselect(w, q0, q0);
wshow(w, q0);
}
return;
case Kright:
if(w->q1 < w->nr){
q1 = w->q1+1;
wsetselect(w, q1, q1);
wshow(w, q1);
}
return;
case Khome:
wshow(w, 0);
return;
case Kend:
wshow(w, w->nr);
return;
case Kscroll:
w->scrolling ^= 1;
wshow(w, w->nr);
return;
case Ksoh: /* ^A: beginning of line */
if(w->q0==0 || w->q0==w->qh || w->r[w->q0-1]=='\n')
return;
nb = wbswidth(w, 0x15 /* ^U */);
wsetselect(w, w->q0-nb, w->q0-nb);
wshow(w, w->q0);
return;
case Kenq: /* ^E: end of line */
q0 = w->q0;
while(q0 < w->nr && w->r[q0]!='\n')
q0++;
wsetselect(w, q0, q0);
wshow(w, w->q0);
return;
case Kstx: /* ^B: output point */
wsetselect(w, w->qh, w->qh);
wshow(w, w->q0);
return;
}
if(w->rawing && (w->q0==w->nr || w->mouseopen)){
waddraw(w, &r, 1);
return;
}
if(r==Kesc || (w->holding && r==Kdel)){ /* toggle hold */
if(w->holding)
--w->holding;
else
w->holding++;
wsetcursor(w, FALSE);
wrepaint(w);
if(r == Kesc)
return;
}
if(r != Kdel){
wsnarf(w);
wcut(w);
}
switch(r){
case Kdel: /* send interrupt */
w->qh = w->nr;
wshow(w, w->qh);
if(w->notefd < 0)
return;
notefd = emalloc(sizeof(int));
*notefd = dup(w->notefd, -1);
proccreate(interruptproc, notefd, 4096);
return;
case Kack: /* ^F: file name completion */
case Kins: /* Insert: file name completion */
namecomplete(w);
return;
case Kbs: /* ^H: erase character */
case Knack: /* ^U: erase line */
case Ketb: /* ^W: erase word */
if(w->q0==0 || w->q0==w->qh)
return;
nb = wbswidth(w, r);
q1 = w->q0;
q0 = q1-nb;
if(q0 < w->org){
q0 = w->org;
nb = q1-q0;
}
if(nb > 0){
wdelete(w, q0, q0+nb);
wsetselect(w, q0, q0);
}
return;
}
/* otherwise ordinary character; just insert */
q0 = w->q0;
q0 = winsert(w, &r, 1, q0);
wshow(w, q0+1);
}
void
wsetcols(Window *w, int topped)
{
if(w->holding)
if(topped)
w->cols[TEXT] = holdcol;
else
w->cols[TEXT] = lightholdcol;
else
if(topped)
w->cols[TEXT] = cols[TEXT];
else
w->cols[TEXT] = paletextcol;
}
void
wrepaint(Window *w)
{
wsetcols(w, w == input);
if(!w->mouseopen)
frredraw(w);
if(w == input)
wborder(w, Selborder);
else
wborder(w, Unselborder);
}
int
wbswidth(Window *w, Rune c)
{
uint q, eq, stop;
Rune r;
int skipping;
/* there is known to be at least one character to erase */
if(c == 0x08) /* ^H: erase character */
return 1;
q = w->q0;
stop = 0;
if(q > w->qh)
stop = w->qh;
skipping = TRUE;
while(q > stop){
r = w->r[q-1];
if(r == '\n'){ /* eat at most one more character */
if(q == w->q0) /* eat the newline */
--q;
break;
}
if(c == 0x17){
eq = isalnum(r);
if(eq && skipping) /* found one; stop skipping */
skipping = FALSE;
else if(!eq && !skipping)
break;
}
--q;
}
return w->q0-q;
}
void
wsnarf(Window *w)
{
if(w->q1 == w->q0)
return;
nsnarf = w->q1-w->q0;
snarf = runerealloc(snarf, nsnarf);
snarfversion++; /* maybe modified by parent */
runemove(snarf, w->r+w->q0, nsnarf);
putsnarf();
}
void
wcut(Window *w)
{
if(w->q1 == w->q0)
return;
wdelete(w, w->q0, w->q1);
wsetselect(w, w->q0, w->q0);
}
void
wpaste(Window *w)
{
uint q0;
if(nsnarf == 0)
return;
wcut(w);
q0 = w->q0;
if(w->rawing && q0==w->nr){
waddraw(w, snarf, nsnarf);
wsetselect(w, q0, q0);
}else{
q0 = winsert(w, snarf, nsnarf, w->q0);
wsetselect(w, q0, q0+nsnarf);
}
}
void
wplumb(Window *w)
{
Plumbmsg *m;
static int fd = -2;
char buf[32];
uint p0, p1;
Cursor *c;
if(fd == -2)
fd = plumbopen("send", OWRITE|OCEXEC);
if(fd < 0)
return;
m = emalloc(sizeof(Plumbmsg));
m->src = estrdup("rio");
m->dst = nil;
m->wdir = estrdup(w->dir);
m->type = estrdup("text");
p0 = w->q0;
p1 = w->q1;
if(w->q1 > w->q0)
m->attr = nil;
else{
while(p0>0 && w->r[p0-1]!=' ' && w->r[p0-1]!='\t' && w->r[p0-1]!='\n')
p0--;
while(p1<w->nr && w->r[p1]!=' ' && w->r[p1]!='\t' && w->r[p1]!='\n')
p1++;
snprint(buf, sizeof(buf), "click=%d", w->q0-p0);
m->attr = plumbunpackattr(buf);
}
if(p1-p0 > messagesize-1024){
plumbfree(m);
return; /* too large for 9P */
}
m->data = runetobyte(w->r+p0, p1-p0, &m->ndata);
if(plumbsend(fd, m) < 0){
c = lastcursor;
riosetcursor(&query);
sleep(300);
riosetcursor(c);
}
plumbfree(m);
}
void
wlook(Window *w)
{
int i, n, e;
i = w->q1;
n = i - w->q0;
e = w->nr - n;
if(n <= 0 || e < n)
return;
if(i > e)
i = 0;
while(runestrncmp(w->r+w->q0, w->r+i, n) != 0){
if(i < e)
i++;
else
i = 0;
}
wsetselect(w, i, i+n);
wshow(w, i);
}
void
wmousectl(Window *w)
{
int but;
for(but=1;; but++){
if(but > 5)
return;
if(w->mc.buttons == 1<<(but-1))
break;
}
incref(w); /* hold up window while we track */
if(w->i != nil){
if(shiftdown && but > 3)
wkeyctl(w, but == 4 ? Kscrolloneup : Kscrollonedown);
else if(ptinrect(w->mc.xy, w->scrollr) || (but > 3))
wscroll(w, but);
else if(but == 1)
wselect(w);
}
wclose(w);
}
void
wdelete(Window *w, uint q0, uint q1)
{
uint n, p0, p1;
n = q1-q0;
if(n == 0)
return;
runemove(w->r+q0, w->r+q1, w->nr-q1);
w->nr -= n;
if(q0 < w->q0)
w->q0 -= min(n, w->q0-q0);
if(q0 < w->q1)
w->q1 -= min(n, w->q1-q0);
if(q1 < w->qh)
w->qh -= n;
else if(q0 < w->qh)
w->qh = q0;
if(q1 <= w->org)
w->org -= n;
else if(q0 < w->org+w->nchars){
p1 = q1 - w->org;
if(p1 > w->nchars)
p1 = w->nchars;
if(q0 < w->org){
w->org = q0;
p0 = 0;
}else
p0 = q0 - w->org;
frdelete(w, p0, p1);
wfill(w);
}
}
static Window *clickwin;
static uint clickmsec;
static uint clickcount;
static Window *selectwin;
static uint selectq;
/*
* called from frame library
*/
void
framescroll(Frame *f, int dl)
{
if(f != &selectwin->Frame)
error("frameselect not right frame");
wframescroll(selectwin, dl);
}
void
wframescroll(Window *w, int dl)
{
uint q0;
if(dl == 0){
wscrsleep(w, 100);
return;
}
if(dl < 0){
q0 = wbacknl(w, w->org, -dl);
if(selectq > w->org+w->p0)
wsetselect(w, w->org+w->p0, selectq);
else
wsetselect(w, selectq, w->org+w->p0);
}else{
if(w->org+w->nchars == w->nr)
return;
q0 = w->org+frcharofpt(w, Pt(w->Frame.r.min.x, w->Frame.r.min.y+dl*w->font->height));
if(selectq >= w->org+w->p1)
wsetselect(w, w->org+w->p1, selectq);
else
wsetselect(w, selectq, w->org+w->p1);
}
wsetorigin(w, q0, TRUE);
}
void
wselect(Window *w)
{
uint q0, q1;
int b, x, y, dx, dy, mode, first;
first = 1;
selectwin = w;
/*
* Double-click immediately if it might make sense.
*/
b = w->mc.buttons;
q0 = w->q0;
q1 = w->q1;
selectq = w->org+frcharofpt(w, w->mc.xy);
clickcount++;
if(w->mc.msec-clickmsec >= 500 || clickwin != w || clickcount > 3)
clickcount = 0;
if(clickwin == w && clickcount >= 1 && w->mc.msec-clickmsec < 500){
mode = (clickcount > 2) ? 2 : clickcount;
wstretchsel(w, selectq, &q0, &q1, mode);
wsetselect(w, q0, q1);
x = w->mc.xy.x;
y = w->mc.xy.y;
/* stay here until something interesting happens */
while(1){
readmouse(&w->mc);
dx = abs(w->mc.xy.x-x);
dy = abs(w->mc.xy.y-y);
if(w->mc.buttons != b || dx >= 3 && dy >= 3)
break;
clickcount++;
clickmsec = w->mc.msec;
}
w->mc.xy.x = x; /* in case we're calling frselect */
w->mc.xy.y = y;
q0 = w->q0; /* may have changed */
q1 = w->q1;
selectq = w->org+frcharofpt(w, w->mc.xy);
}
if(w->mc.buttons == b && clickcount == 0){
w->scroll = framescroll;
frselect(w, &w->mc);
/* horrible botch: while asleep, may have lost selection altogether */
if(selectq > w->nr)
selectq = w->org + w->p0;
w->Frame.scroll = nil;
if(selectq < w->org)
q0 = selectq;
else
q0 = w->org + w->p0;
if(selectq > w->org+w->nchars)
q1 = selectq;
else
q1 = w->org+w->p1;
}
if(q0 == q1){
mode = (clickcount > 2) ? 2 : clickcount;
if(q0==w->q0 && clickwin==w && w->mc.msec-clickmsec<500)
wstretchsel(w, selectq, &q0, &q1, mode);
else
clickwin = w;
clickmsec = w->mc.msec;
}
wsetselect(w, q0, q1);
while(w->mc.buttons){
w->mc.msec = 0;
b = w->mc.buttons;
if(b & 6){
if(b & 2){
wsnarf(w);
wcut(w);
}else{
if(first){
first = 0;
getsnarf();
}
wpaste(w);
}
}
wscrdraw(w);
while(w->mc.buttons == b)
readmouse(&w->mc);
if(w->mc.msec-clickmsec >= 500)
clickwin = nil;
}
}
void
wsendctlmesg(Window *w, int type, Rectangle r, void *p)
{
Wctlmesg wcm;
wcm.type = type;
wcm.r = r;
wcm.p = p;
send(w->cctl, &wcm);
}
int
wctlmesg(Window *w, int m, Rectangle r, void *p)
{
Image *i = p;
switch(m){
default:
error("unknown control message");
break;
case Wakeup:
if(p!=nil)
sendp((Channel*)p, w);
break;
case Reshaped:
if(w->deleted){
freeimage(i);
break;
}
w->screenr = r;
wresize(w, i);
if(Dx(r)<=0){ /* window got hidden, if we had the input, drop it */
if(w==input)
input = nil;
break;
}
/* fall through to get input if needed */
case Topped:
if(w->deleted || w==input)
break;
if(input!=nil){
Window *oi;
Channel *c;
oi = input;
incref(oi);
/*
* have to wait until old input responds before
* changing input to us because the window might
* currently be mouse tracking and it is not
* prepared for getting its input revoked.
*/
c = chancreate(sizeof(void*), 0);
wsendctlmesg(oi, Wakeup, ZR, c);
recv(c, nil);
chanfree(c);
/*
* if we are still top window and nobody else has taken
* input from original window, take the input.
*/
if(!w->deleted && w->topped==topped && oi==input){
input = w;
oi->wctlready = 1;
wsendctlmesg(oi, Repaint, ZR, nil);
}
wclose(oi);
} else {
input = w;
wsetcursor(w, FALSE);
}
w->wctlready = 1;
if(m!=Topped && w==input)
break;
/* fall thrugh for redraw after input change */
case Repaint:
if(w->i==nil || Dx(w->screenr)<=0)
break;
wrepaint(w);
flushimage(display, 1);
break;
case Refresh:
if(w->i==nil || Dx(w->screenr)<=0 || w->mouseopen)
break;
wrefresh(w);
flushimage(display, 1);
break;
case Movemouse:
if(w->i==nil || Dx(w->screenr)<=0 || !ptinrect(r.min, w->i->r))
break;
wmovemouse(w, r.min);
case Rawon:
break;
case Rawoff:
while(w->nraw > 0){
wkeyctl(w, w->raw[0]);
--w->nraw;
runemove(w->raw, w->raw+1, w->nraw);
}
break;
case Holdon:
case Holdoff:
if(w->i==nil)
break;
wsetcursor(w, FALSE);
wrepaint(w);
flushimage(display, 1);
break;
case Truncate:
wdelete(w, 0, w->nr);
break;
case Deleted:
wclunk(w);
if(w->notefd >= 0)
write(w->notefd, "hangup", 6);
wclosewin(w);
flushimage(display, 1);
break;
case Exited:
wclosewin(w);
frclear(w, TRUE);
flushimage(display, 1);
if(w->notefd >= 0)
close(w->notefd);
chanfree(w->mc.c);
chanfree(w->ck);
chanfree(w->cctl);
chanfree(w->conswrite);
chanfree(w->consread);
chanfree(w->mouseread);
chanfree(w->wctlread);
chanfree(w->kbdread);
chanfree(w->complete);
chanfree(w->gone);
free(w->raw);
free(w->r);
free(w->dir);
free(w->label);
free(w);
break;
}
return m;
}
/*
* Convert back to physical coordinates
*/
void
wmovemouse(Window *w, Point p)
{
if(w != input || menuing || sweeping)
return;
p.x += w->screenr.min.x-w->i->r.min.x;
p.y += w->screenr.min.y-w->i->r.min.y;
moveto(mousectl, p);
}
void
wborder(Window *w, int type)
{
Image *col;
if(w->i == nil)
return;
if(w->holding){
if(type == Selborder)
col = holdcol;
else
col = paleholdcol;
}else{
if(type == Selborder)
col = titlecol;
else
col = lighttitlecol;
}
border(w->i, w->i->r, Selborder, col, ZP);
}
Window*
wpointto(Point pt)
{
int i;
Window *v, *w;
w = nil;
for(i=0; i<nwindow; i++){
v = window[i];
if(ptinrect(pt, v->screenr))
if(w==nil || v->topped>w->topped)
w = v;
}
return w;
}
void
wcurrent(Window *w)
{
if(w!=nil && w!=input)
wsendctlmesg(w, Topped, ZR, nil);
}
void
wsetcursor(Window *w, int force)
{
Cursor *p;
if(menuing || sweeping || (w!=input && wpointto(mouse->xy)!=w))
return;
if(w==nil)
p = nil;
else {
p = w->cursorp;
if(p==nil && w->holding)
p = &whitearrow;
}
if(p && force) /* force cursor reload */
lastcursor = nil;
riosetcursor(p);
}
void
riosetcursor(Cursor *p)
{
if(p==lastcursor)
return;
setcursor(mousectl, p);
lastcursor = p;
}
void
wtopme(Window *w)
{
if(w!=nil && w->i!=nil && w->topped!=topped){
w->topped = ++topped;
topwindow(w->i);
flushimage(display, 1);
}
}
void
wbottomme(Window *w)
{
if(w!=nil && w->i!=nil){
w->topped = - ++topped;
bottomwindow(w->i);
flushimage(display, 1);
}
}
Window*
wtop(Point pt)
{
Window *w;
w = wpointto(pt);
if(w){
incref(w);
wtopme(w);
wcurrent(w);
wclose(w);
}
return w;
}
Window*
wlookid(int id)
{
int i;
for(i=0; i<nwindow; i++)
if(window[i]->id == id)
return window[i];
return nil;
}
void
wclunk(Window *w)
{
int i;
if(w->deleted)
return;
w->deleted = TRUE;
if(w == input){
input = nil;
riosetcursor(nil);
}
if(w == wkeyboard)
wkeyboard = nil;
for(i=0; i<nhidden; i++)
if(hidden[i] == w){
--nhidden;
memmove(hidden+i, hidden+i+1, (nhidden-i)*sizeof(hidden[0]));
break;
}
for(i=0; i<nwindow; i++)
if(window[i] == w){
--nwindow;
memmove(window+i, window+i+1, (nwindow-i)*sizeof(window[0]));
break;
}
}
void
wclosewin(Window *w)
{
Image *i = w->i;
if(i == nil)
return;
w->i = nil;
/* move it off-screen to hide it, in case client is slow in letting it go */
originwindow(i, i->r.min, view->r.max);
freeimage(i);
}
void
wsetpid(Window *w, int pid, int dolabel)
{
char buf[64];
int ofd;
ofd = w->notefd;
if(pid <= 0)
w->notefd = -1;
else {
if(dolabel){
snprint(buf, sizeof(buf), "rc %d", pid);
free(w->label);
w->label = estrdup(buf);
}
snprint(buf, sizeof(buf), "/proc/%d/notepg", pid);
w->notefd = open(buf, OWRITE|OCEXEC);
}
if(ofd >= 0)
close(ofd);
}
void
winshell(void *args)
{
Window *w;
Channel *pidc;
void **arg;
char *cmd, *dir;
char **argv;
arg = args;
w = arg[0];
pidc = arg[1];
cmd = arg[2];
argv = arg[3];
dir = arg[4];
rfork(RFNAMEG|RFFDG|RFENVG);
if(filsysmount(filsys, w->id) < 0){
fprint(2, "mount failed: %r\n");
sendul(pidc, 0);
threadexits("mount failed");
}
close(0);
if(open("/dev/cons", OREAD) < 0){
fprint(2, "can't open /dev/cons: %r\n");
sendul(pidc, 0);
threadexits("/dev/cons");
}
close(1);
if(open("/dev/cons", OWRITE) < 0){
fprint(2, "can't open /dev/cons: %r\n");
sendul(pidc, 0);
threadexits("open"); /* BUG? was terminate() */
}
if(wclose(w) == 0){ /* remove extra ref hanging from creation */
notify(nil);
dup(1, 2);
if(dir)
chdir(dir);
procexec(pidc, cmd, argv);
_exits("exec failed");
}
}
static Rune left1[] = { L'{', L'[', L'(', L'<', L'«', 0 };
static Rune right1[] = { L'}', L']', L')', L'>', L'»', 0 };
static Rune left2[] = { L'\n', 0 };
static Rune left3[] = { L'\'', L'"', L'`', 0 };
Rune *left[] = {
left1,
left2,
left3,
nil
};
Rune *right[] = {
right1,
left2,
left3,
nil
};
int
inmode(Rune r, int mode)
{
return (mode == 1) ? isalnum(r) : r && !isspace(r);
}
void
wstretchsel(Window *w, uint pt, uint *q0, uint *q1, int mode)
{
int c, i;
Rune *r, *l, *p;
uint q;
*q0 = pt;
*q1 = pt;
for(i=0; left[i]!=nil; i++){
q = *q0;
l = left[i];
r = right[i];
/* try matching character to left, looking right */
if(q == 0)
c = '\n';
else
c = w->r[q-1];
p = strrune(l, c);
if(p != nil){
if(wclickmatch(w, c, r[p-l], 1, &q))
*q1 = q-(c!='\n');
return;
}
/* try matching character to right, looking left */
if(q == w->nr)
c = '\n';
else
c = w->r[q];
p = strrune(r, c);
if(p != nil){
if(wclickmatch(w, c, l[p-r], -1, &q)){
*q1 = *q0+(*q0<w->nr && c=='\n');
*q0 = q;
if(c!='\n' || q!=0 || w->r[0]=='\n')
(*q0)++;
}
return;
}
}
/* try filling out word to right */
while(*q1<w->nr && inmode(w->r[*q1], mode))
(*q1)++;
/* try filling out word to left */
while(*q0>0 && inmode(w->r[*q0-1], mode))
(*q0)--;
}
int
wclickmatch(Window *w, int cl, int cr, int dir, uint *q)
{
Rune c;
int nest;
nest = 1;
for(;;){
if(dir > 0){
if(*q == w->nr)
break;
c = w->r[*q];
(*q)++;
}else{
if(*q == 0)
break;
(*q)--;
c = w->r[*q];
}
if(c == cr){
if(--nest==0)
return 1;
}else if(c == cl)
nest++;
}
return cl=='\n' && nest==1;
}
uint
wbacknl(Window *w, uint p, uint n)
{
int i, j;
/* look for start of this line if n==0 */
if(n==0 && p>0 && w->r[p-1]!='\n')
n = 1;
i = n;
while(i-->0 && p>0){
--p; /* it's at a newline now; back over it */
if(p == 0)
break;
/* at 128 chars, call it a line anyway */
for(j=128; --j>0 && p>0; p--)
if(w->r[p-1]=='\n')
break;
}
return p;
}
void
wshow(Window *w, uint q0)
{
int qe;
int nl;
uint q;
qe = w->org+w->nchars;
if(w->org<=q0 && (q0<qe || (q0==qe && qe==w->nr)))
wscrdraw(w);
else{
nl = 4*w->maxlines/5;
q = wbacknl(w, q0, nl);
/* avoid going backwards if trying to go forwards - long lines! */
if(!(q0>w->org && q<w->org))
wsetorigin(w, q, TRUE);
while(q0 > w->org+w->nchars)
wsetorigin(w, w->org+1, FALSE);
}
}
void
wsetorigin(Window *w, uint org, int exact)
{
int i, a, fixup;
Rune *r;
uint n;
if(org>0 && !exact){
/* org is an estimate of the char posn; find a newline */
/* don't try harder than 256 chars */
for(i=0; i<256 && org<w->nr; i++){
if(w->r[org] == '\n'){
org++;
break;
}
org++;
}
}
a = org-w->org;
fixup = 0;
if(a>=0 && a<w->nchars){
frdelete(w, 0, a);
fixup = 1; /* frdelete can leave end of last line in wrong selection mode; it doesn't know what follows */
}else if(a<0 && -a<w->nchars){
n = w->org - org;
r = w->r+org;
frinsert(w, r, r+n, 0);
}else
frdelete(w, 0, w->nchars);
w->org = org;
wfill(w);
wscrdraw(w);
wsetselect(w, w->q0, w->q1);
if(fixup && w->p1 > w->p0)
frdrawsel(w, frptofchar(w, w->p1-1), w->p1-1, w->p1, 1);
}
void
wsetselect(Window *w, uint q0, uint q1)
{
int p0, p1;
/* w->p0 and w->p1 are always right; w->q0 and w->q1 may be off */
w->q0 = q0;
w->q1 = q1;
/* compute desired p0,p1 from q0,q1 */
p0 = q0-w->org;
p1 = q1-w->org;
if(p0 < 0)
p0 = 0;
if(p1 < 0)
p1 = 0;
if(p0 > w->nchars)
p0 = w->nchars;
if(p1 > w->nchars)
p1 = w->nchars;
if(p0==w->p0 && p1==w->p1)
return;
/* screen disagrees with desired selection */
if(w->p1<=p0 || p1<=w->p0 || p0==p1 || w->p1==w->p0){
/* no overlap or too easy to bother trying */
frdrawsel(w, frptofchar(w, w->p0), w->p0, w->p1, 0);
frdrawsel(w, frptofchar(w, p0), p0, p1, 1);
goto Return;
}
/* overlap; avoid unnecessary painting */
if(p0 < w->p0){
/* extend selection backwards */
frdrawsel(w, frptofchar(w, p0), p0, w->p0, 1);
}else if(p0 > w->p0){
/* trim first part of selection */
frdrawsel(w, frptofchar(w, w->p0), w->p0, p0, 0);
}
if(p1 > w->p1){
/* extend selection forwards */
frdrawsel(w, frptofchar(w, w->p1), w->p1, p1, 1);
}else if(p1 < w->p1){
/* trim last part of selection */
frdrawsel(w, frptofchar(w, p1), p1, w->p1, 0);
}
Return:
w->p0 = p0;
w->p1 = p1;
}
uint
winsert(Window *w, Rune *r, int n, uint q0)
{
uint m;
if(n == 0)
return q0;
if(w->nr+n>HiWater && q0>=w->org && q0>=w->qh){
m = min(HiWater-LoWater, min(w->org, w->qh));
w->org -= m;
w->qh -= m;
if(w->q0 > m)
w->q0 -= m;
else
w->q0 = 0;
if(w->q1 > m)
w->q1 -= m;
else
w->q1 = 0;
w->nr -= m;
runemove(w->r, w->r+m, w->nr);
q0 -= m;
}
if(w->nr+n > w->maxr){
/*
* Minimize realloc breakage:
* Allocate at least MinWater
* Double allocation size each time
* But don't go much above HiWater
*/
m = max(min(2*(w->nr+n), HiWater), w->nr+n)+MinWater;
if(m > HiWater)
m = max(HiWater+MinWater, w->nr+n);
if(m > w->maxr){
w->r = runerealloc(w->r, m);
w->maxr = m;
}
}
runemove(w->r+q0+n, w->r+q0, w->nr-q0);
runemove(w->r+q0, r, n);
w->nr += n;
/* if output touches, advance selection, not qh; works best for keyboard and output */
if(q0 <= w->q1)
w->q1 += n;
if(q0 <= w->q0)
w->q0 += n;
if(q0 < w->qh)
w->qh += n;
if(q0 < w->org)
w->org += n;
else if(q0 <= w->org+w->nchars)
frinsert(w, r, r+n, q0-w->org);
return q0;
}
void
wfill(Window *w)
{
Rune *rp;
int i, n, m, nl;
while(w->lastlinefull == FALSE){
n = w->nr-(w->org+w->nchars);
if(n == 0)
break;
if(n > 2000) /* educated guess at reasonable amount */
n = 2000;
rp = w->r+(w->org+w->nchars);
/*
* it's expensive to frinsert more than we need, so
* count newlines.
*/
nl = w->maxlines-w->nlines;
m = 0;
for(i=0; i<n; ){
if(rp[i++] == '\n'){
m++;
if(m >= nl)
break;
}
}
frinsert(w, rp, rp+i, w->nchars);
}
}
char*
wcontents(Window *w, int *ip)
{
return runetobyte(w->r, w->nr, ip);
}