ref: fe1eb39db7ae6904924f3ab1f6f9b34416f2eb1b
dir: /sys/src/cmd/acme/look.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 "dat.h"
#include "fns.h"
Window* openfile(Text*, Expand*);
int nuntitled;
void
look3(Text *t, uint q0, uint q1, int external)
{
int n, c, f, expanded;
Text *ct;
Expand e;
Rune *r;
uint p;
Plumbmsg *m;
Runestr dir;
char buf[32];
ct = seltext;
if(ct == nil)
seltext = t;
expanded = expand(t, q0, q1, &e);
if(!external && t->w!=nil && t->w->nopen[QWevent]>0){
/* send alphanumeric expansion to external client */
if(expanded == FALSE)
return;
f = 0;
if((e.at!=nil && t->w!=nil) || (e.nname>0 && lookfile(e.name, e.nname)!=nil))
f = 1; /* acme can do it without loading a file */
if(q0!=e.q0 || q1!=e.q1)
f |= 2; /* second (post-expand) message follows */
if(e.nname)
f |= 4; /* it's a file name */
c = 'l';
if(t->what == Body)
c = 'L';
n = q1-q0;
if(n <= EVENTSIZE){
r = runemalloc(n);
bufread(t->file, q0, r, n);
winevent(t->w, "%c%d %d %d %d %.*S\n", c, q0, q1, f, n, n, r);
free(r);
}else
winevent(t->w, "%c%d %d %d 0 \n", c, q0, q1, f, n);
if(q0==e.q0 && q1==e.q1)
return;
if(e.nname){
n = e.nname;
if(e.a1 > e.a0)
n += 1+(e.a1-e.a0);
r = runemalloc(n);
runemove(r, e.name, e.nname);
if(e.a1 > e.a0){
r[e.nname] = ':';
bufread(e.at->file, e.a0, r+e.nname+1, e.a1-e.a0);
}
}else{
n = e.q1 - e.q0;
r = runemalloc(n);
bufread(t->file, e.q0, r, n);
}
f &= ~2;
if(n <= EVENTSIZE)
winevent(t->w, "%c%d %d %d %d %.*S\n", c, e.q0, e.q1, f, n, n, r);
else
winevent(t->w, "%c%d %d %d 0 \n", c, e.q0, e.q1, f, n);
free(r);
goto Return;
}
if(plumbsendfd >= 0){
/* send whitespace-delimited word to plumber */
m = emalloc(sizeof(Plumbmsg));
m->src = estrdup("acme");
m->dst = nil;
dir = dirname(t, nil, 0);
if(dir.nr==1 && dir.r[0]=='.'){ /* sigh */
free(dir.r);
dir.r = nil;
dir.nr = 0;
}
if(dir.nr == 0)
m->wdir = estrdup(wdir);
else
m->wdir = runetobyte(dir.r, dir.nr);
free(dir.r);
m->type = estrdup("text");
m->attr = nil;
buf[0] = '\0';
if(q1 == q0){
if(t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
q0 = t->q0;
q1 = t->q1;
}else{
p = q0;
while(q0>0 && (c=tgetc(t, q0-1))!=' ' && c!='\t' && c!='\n')
q0--;
while(q1<t->file->nc && (c=tgetc(t, q1))!=' ' && c!='\t' && c!='\n')
q1++;
if(q1 == q0){
plumbfree(m);
goto Return;
}
sprint(buf, "click=%d", p-q0);
m->attr = plumbunpackattr(buf);
}
}
r = runemalloc(q1-q0);
bufread(t->file, q0, r, q1-q0);
m->data = runetobyte(r, q1-q0);
m->ndata = strlen(m->data);
free(r);
if(m->ndata<messagesize-1024 && plumbsend(plumbsendfd, m) >= 0){
plumbfree(m);
goto Return;
}
plumbfree(m);
/* plumber failed to match; fall through */
}
/* interpret alphanumeric string ourselves */
if(expanded == FALSE)
return;
if(e.name || e.at)
openfile(t, &e);
else{
if(t->w == nil)
return;
ct = &t->w->body;
if(t->w != ct->w)
winlock(ct->w, 'M');
if(t == ct)
textsetselect(ct, e.q1, e.q1);
n = e.q1 - e.q0;
r = runemalloc(n);
bufread(t->file, e.q0, r, n);
if(search(ct, r, n) && e.jump)
moveto(mousectl, addpt(frptofchar(ct, ct->p0), Pt(4, ct->font->height-4)));
if(t->w != ct->w)
winunlock(ct->w);
free(r);
}
Return:
free(e.name);
free(e.bname);
}
int
plumbgetc(void *a, uint n)
{
Rune *r;
r = a;
if(n>runestrlen(r))
return 0;
return r[n];
}
void
plumblook(Plumbmsg *m)
{
Expand e;
char *addr;
if(m->ndata >= BUFSIZE){
warning(nil, "insanely long file name (%d bytes) in plumb message (%.32s...)\n", m->ndata, m->data);
return;
}
e.q0 = 0;
e.q1 = 0;
if(m->data[0] == '\0')
return;
e.ar = nil;
e.bname = m->data;
e.name = bytetorune(e.bname, &e.nname);
e.jump = TRUE;
e.a0 = 0;
e.a1 = 0;
addr = plumblookup(m->attr, "addr");
if(addr != nil){
e.ar = bytetorune(addr, &e.a1);
e.agetc = plumbgetc;
}
openfile(nil, &e);
free(e.name);
free(e.at);
}
void
plumbshow(Plumbmsg *m)
{
Window *w;
Rune rb[256], *r;
int nb, nr;
Runestr rs;
char *name, *p, namebuf[16];
w = makenewwindow(nil);
name = plumblookup(m->attr, "filename");
if(name == nil){
name = namebuf;
nuntitled++;
snprint(namebuf, sizeof namebuf, "Untitled-%d", nuntitled);
}
p = nil;
if(name[0]!='/' && m->wdir!=nil && m->wdir[0]!='\0'){
nb = strlen(m->wdir) + 1 + strlen(name) + 1;
p = emalloc(nb);
snprint(p, nb, "%s/%s", m->wdir, name);
name = p;
}
cvttorunes(name, strlen(name), rb, &nb, &nr, nil);
free(p);
rs = cleanrname((Runestr){rb, nr});
winsetname(w, rs.r, rs.nr);
r = runemalloc(m->ndata);
cvttorunes(m->data, m->ndata, r, &nb, &nr, nil);
textinsert(&w->body, 0, r, nr, TRUE);
free(r);
w->body.file->mod = FALSE;
w->dirty = FALSE;
winsettag(w);
textscrdraw(&w->body);
textsetselect(&w->tag, w->tag.file->nc, w->tag.file->nc);
xfidlog(w, "new");
}
int
search(Text *ct, Rune *r, uint n)
{
uint q, nb, maxn;
int around;
Rune *s, *b, *c;
if(n==0 || n>ct->file->nc)
return FALSE;
if(2*n > RBUFSIZE){
warning(nil, "string too long\n");
return FALSE;
}
maxn = max(2*n, RBUFSIZE);
s = fbufalloc();
b = s;
nb = 0;
b[nb] = 0;
around = 0;
q = ct->q1;
for(;;){
if(q >= ct->file->nc){
q = 0;
around = 1;
nb = 0;
b[nb] = 0;
}
if(nb > 0){
c = runestrchr(b, r[0]);
if(c == nil){
q += nb;
nb = 0;
b[nb] = 0;
if(around && q>=ct->q1)
break;
continue;
}
q += (c-b);
nb -= (c-b);
b = c;
}
/* reload if buffer covers neither string nor rest of file */
if(nb<n && nb!=ct->file->nc-q){
nb = ct->file->nc-q;
if(nb >= maxn)
nb = maxn-1;
bufread(ct->file, q, s, nb);
b = s;
b[nb] = '\0';
}
/* this runeeq is fishy but the null at b[nb] makes it safe */
if(runeeq(b, n, r, n)==TRUE){
if(ct->w){
textshow(ct, q, q+n, 1);
winsettag(ct->w);
}else{
ct->q0 = q;
ct->q1 = q+n;
}
seltext = ct;
fbuffree(s);
return TRUE;
}
--nb;
b++;
q++;
if(around && q>=ct->q1)
break;
}
fbuffree(s);
return FALSE;
}
int
isfilec(Rune r)
{
if(isalnum(r))
return TRUE;
if(runestrchr(L".-+/:@", r))
return TRUE;
return FALSE;
}
/* Runestr wrapper for cleanname */
Runestr
cleanrname(Runestr rs)
{
char *s;
int nb, nulls;
s = runetobyte(rs.r, rs.nr);
cleanname(s);
cvttorunes(s, strlen(s), rs.r, &nb, &rs.nr, &nulls);
free(s);
return rs;
}
Runestr
includefile(Rune *dir, Rune *file, int nfile)
{
int m, n;
char *a;
Rune *r;
m = runestrlen(dir);
a = emalloc((m+1+nfile)*UTFmax+1);
sprint(a, "%S/%.*S", dir, nfile, file);
n = access(a, 0);
free(a);
if(n < 0)
return (Runestr){nil, 0};
r = runemalloc(m+1+nfile);
runemove(r, dir, m);
runemove(r+m, L"/", 1);
runemove(r+m+1, file, nfile);
free(file);
return cleanrname((Runestr){r, m+1+nfile});
}
static Rune *objdir;
Runestr
includename(Text *t, Rune *r, int n)
{
Window *w;
char buf[128];
Runestr file;
int i;
if(objdir==nil && objtype!=nil){
sprint(buf, "/%s/include", objtype);
objdir = bytetorune(buf, &i);
objdir = runerealloc(objdir, i+1);
objdir[i] = '\0';
}
w = t->w;
if(n==0 || r[0]=='/' || w==nil)
goto Rescue;
if(n>2 && r[0]=='.' && r[1]=='/')
goto Rescue;
file.r = nil;
file.nr = 0;
for(i=0; i<w->nincl && file.r==nil; i++)
file = includefile(w->incl[i], r, n);
if(file.r == nil)
file = includefile(L"/sys/include", r, n);
if(file.r==nil && objdir!=nil)
file = includefile(objdir, r, n);
if(file.r == nil)
goto Rescue;
return file;
Rescue:
return (Runestr){r, n};
}
Runestr
dirname(Text *t, Rune *r, int n)
{
Rune *b, c;
uint m, nt;
int slash;
Runestr tmp;
b = nil;
if(t==nil || t->w==nil)
goto Rescue;
nt = t->w->tag.file->nc;
if(nt == 0)
goto Rescue;
if(n>=1 && r[0]=='/')
goto Rescue;
b = runemalloc(nt+n+1);
bufread(t->w->tag.file, 0, b, nt);
slash = -1;
for(m=0; m<nt; m++){
c = b[m];
if(c == '/')
slash = m;
if(c==' ' || c=='\t')
break;
}
if(slash < 0)
goto Rescue;
runemove(b+slash+1, r, n);
free(r);
return cleanrname((Runestr){b, slash+1+n});
Rescue:
free(b);
tmp = (Runestr){r, n};
if(r)
return cleanrname(tmp);
return tmp;
}
int
expandfile(Text *t, uint q0, uint q1, Expand *e)
{
int i, n, nname, colon, eval;
uint amin, amax;
Rune *r, c;
Window *w;
Runestr rs;
amax = q1;
if(q1 == q0){
colon = -1;
while(q1<t->file->nc && isfilec(c=textreadc(t, q1))){
if(c == ':'){
colon = q1;
break;
}
q1++;
}
while(q0>0 && (isfilec(c=textreadc(t, q0-1)) || isaddrc(c) || isregexc(c))){
q0--;
if(colon<0 && c==':')
colon = q0;
}
/*
* if it looks like it might begin file: , consume address chars after :
* otherwise terminate expansion at :
*/
if(colon >= 0){
q1 = colon;
if(colon<t->file->nc-1 && isaddrc(textreadc(t, colon+1))){
q1 = colon+1;
while(q1<t->file->nc && isaddrc(textreadc(t, q1)))
q1++;
}
}
if(q1 > q0)
if(colon >= 0){ /* stop at white space */
for(amax=colon+1; amax<t->file->nc; amax++)
if((c=textreadc(t, amax))==' ' || c=='\t' || c=='\n')
break;
}else
amax = t->file->nc;
}
amin = amax;
e->q0 = q0;
e->q1 = q1;
n = q1-q0;
if(n == 0)
return FALSE;
/* see if it's a file name */
r = runemalloc(n);
bufread(t->file, q0, r, n);
/* first, does it have bad chars? */
nname = -1;
for(i=0; i<n; i++){
c = r[i];
if(c==':' && nname<0){
if(q0+i+1<t->file->nc && (i==n-1 || isaddrc(textreadc(t, q0+i+1))))
amin = q0+i;
else
goto Isntfile;
nname = i;
}
}
if(nname == -1)
nname = n;
for(i=0; i<nname; i++)
if(!isfilec(r[i]))
goto Isntfile;
/*
* See if it's a file name in <>, and turn that into an include
* file name if so. Should probably do it for "" too, but that's not
* restrictive enough syntax and checking for a #include earlier on the
* line would be silly.
*/
if(q0>0 && textreadc(t, q0-1)=='<' && q1<t->file->nc && textreadc(t, q1)=='>'){
rs = includename(t, r, nname);
r = rs.r;
nname = rs.nr;
}
else if(amin == q0)
goto Isfile;
else{
rs = dirname(t, r, nname);
r = rs.r;
nname = rs.nr;
}
e->bname = runetobyte(r, nname);
/* if it's already a window name, it's a file */
w = lookfile(r, nname);
if(w != nil)
goto Isfile;
/* if it's the name of a file, it's a file */
if(access(e->bname, 0) < 0){
free(e->bname);
e->bname = nil;
goto Isntfile;
}
Isfile:
e->name = r;
e->nname = nname;
e->at = t;
e->a0 = amin+1;
eval = FALSE;
address(nil, nil, (Range){-1,-1}, (Range){0, 0}, t, e->a0, amax, tgetc, &eval, (uint*)&e->a1);
return TRUE;
Isntfile:
free(r);
return FALSE;
}
int
expand(Text *t, uint q0, uint q1, Expand *e)
{
memset(e, 0, sizeof *e);
e->agetc = tgetc;
/* if in selection, choose selection */
e->jump = TRUE;
if(q1==q0 && t->q1>t->q0 && t->q0<=q0 && q0<=t->q1){
q0 = t->q0;
q1 = t->q1;
if(t->what == Tag)
e->jump = FALSE;
}
if(expandfile(t, q0, q1, e))
return TRUE;
if(q0 == q1){
while(q1<t->file->nc && isalnum(textreadc(t, q1)))
q1++;
while(q0>0 && isalnum(textreadc(t, q0-1)))
q0--;
}
e->q0 = q0;
e->q1 = q1;
return q1 > q0;
}
Window*
lookfile(Rune *s, int n)
{
int i, j, k;
Window *w;
Column *c;
Text *t;
/* avoid terminal slash on directories */
if(n>1 && s[n-1] == '/')
--n;
for(j=0; j<row.ncol; j++){
c = row.col[j];
for(i=0; i<c->nw; i++){
w = c->w[i];
t = &w->body;
k = t->file->nname;
if(k>1 && t->file->name[k-1] == '/')
k--;
if(runeeq(t->file->name, k, s, n)){
w = w->body.file->curtext->w;
if(w->col != nil) /* protect against race deleting w */
return w;
}
}
}
return nil;
}
Window*
lookid(int id, int dump)
{
int i, j;
Window *w;
Column *c;
for(j=0; j<row.ncol; j++){
c = row.col[j];
for(i=0; i<c->nw; i++){
w = c->w[i];
if(dump && w->dumpid == id)
return w;
if(!dump && w->id == id)
return w;
}
}
return nil;
}
Window*
openfile(Text *t, Expand *e)
{
Range r;
Window *w, *ow;
int eval, i, n;
Rune *rp;
uint dummy;
if(e->nname == 0){
w = t->w;
if(w == nil)
return nil;
}else
w = lookfile(e->name, e->nname);
if(w){
t = &w->body;
if(!t->col->safe && t->maxlines==0) /* window is obscured by full-column window */
colgrow(t->col, t->col->w[0], 1);
}else{
ow = nil;
if(t)
ow = t->w;
w = makenewwindow(t);
t = &w->body;
winsetname(w, e->name, e->nname);
textload(t, 0, e->bname, 1);
t->file->mod = FALSE;
t->w->dirty = FALSE;
winsettag(t->w);
textsetselect(&t->w->tag, t->w->tag.file->nc, t->w->tag.file->nc);
if(ow != nil){
for(i=ow->nincl; --i>=0; ){
n = runestrlen(ow->incl[i]);
rp = runemalloc(n);
runemove(rp, ow->incl[i], n);
winaddincl(w, rp, n);
}
for(i=0; i < NINDENT; i++)
w->indent[i] = ow->indent[i];
}else
for(i=0; i < NINDENT; i++)
w->indent[i] = globalindent[i];
xfidlog(w, "new");
}
if(e->a1 == e->a0)
eval = FALSE;
else{
eval = TRUE;
r = address(nil, t, (Range){-1, -1}, (Range){t->q0, t->q1}, e->at, e->a0, e->a1, e->agetc, &eval, &dummy);
if(eval == FALSE)
e->jump = FALSE; /* don't jump if invalid address */
}
if(eval == FALSE){
r.q0 = t->q0;
r.q1 = t->q1;
}
textshow(t, r.q0, r.q1, 1);
winsettag(t->w);
seltext = t;
if(e->jump)
moveto(mousectl, addpt(frptofchar(t, t->p0), Pt(4, font->height-4)));
return w;
}
void
new(Text *et, Text *t, Text *argt, int flag1, int flag2, Rune *arg, int narg)
{
int ndone;
Rune *a, *f;
int na, nf;
Expand e;
Runestr rs;
Window *w;
getarg(argt, FALSE, TRUE, &a, &na);
if(a){
new(et, t, nil, flag1, flag2, a, na);
if(narg == 0)
return;
}
/* loop condition: *arg is not a blank */
for(ndone=0; ; ndone++){
a = findbl(arg, narg, &na);
if(a == arg){
if(ndone==0 && et->col!=nil) {
w = coladd(et->col, nil, nil, -1);
winsettag(w);
xfidlog(w, "new");
}
break;
}
nf = narg-na;
f = runemalloc(nf);
runemove(f, arg, nf);
rs = dirname(et, f, nf);
f = rs.r;
nf = rs.nr;
memset(&e, 0, sizeof e);
e.name = f;
e.nname = nf;
e.bname = runetobyte(f, nf);
e.jump = TRUE;
openfile(et, &e);
free(f);
free(e.bname);
arg = skipbl(a, na, &narg);
}
}