#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"
Image *tagcols[NCOL];
Image *textcols[NCOL];
enum{
TABDIR = 3 /* width of tabs in directory windows */
};
void
textinit(Text *t, File *f, Rectangle r, Reffont *rf, Image *cols[NCOL])
{
t->file = f;
t->all = r;
t->scrollr = r;
t->scrollr.max.x = r.min.x+Scrollwid;
t->lastsr = nullrect;
r.min.x += Scrollwid+Scrollgap;
t->eq0 = ~0;
t->ncache = 0;
t->reffont = rf;
t->tabstop = maxtab;
memmove(t->Frame.cols, cols, sizeof t->Frame.cols);
textredraw(t, r, rf->f, screen, -1);
}
void
textredraw(Text *t, Rectangle r, Font *f, Image *b, int odx)
{
int maxt;
Rectangle rr;
frinit(t, r, f, b, t->Frame.cols);
rr = t->r;
rr.min.x -= Scrollwid; /* back fill to scroll bar */
draw(t->b, rr, t->cols[BACK], nil, ZP);
/* use no wider than 3-space tabs in a directory */
maxt = maxtab;
if(t->what == Body){
if(t->w->isdir)
maxt = min(TABDIR, maxtab);
else
maxt = t->tabstop;
}
t->maxtab = maxt*stringwidth(f, "0");
if(t->what==Body && t->w->isdir && odx!=Dx(t->all)){
if(t->maxlines > 0){
textreset(t);
textcolumnate(t, t->w->dlp, t->w->ndl);
textshow(t, 0, 0, 1);
}
}else{
textfill(t);
textsetselect(t, t->q0, t->q1);
}
}
int
textresize(Text *t, Rectangle r)
{
int odx;
if(Dy(r) > 0)
r.max.y -= Dy(r)%t->font->height;
else
r.max.y = r.min.y;
odx = Dx(t->all);
t->all = r;
t->scrollr = r;
t->scrollr.max.x = r.min.x+Scrollwid;
t->lastsr = nullrect;
r.min.x += Scrollwid+Scrollgap;
frclear(t, 0);
textredraw(t, r, t->font, t->b, odx);
return r.max.y;
}
void
textclose(Text *t)
{
free(t->cache);
frclear(t, 1);
filedeltext(t->file, t);
t->file = nil;
rfclose(t->reffont);
if(argtext == t)
argtext = nil;
if(typetext == t)
typetext = nil;
if(seltext == t)
seltext = nil;
if(mousetext == t)
mousetext = nil;
if(barttext == t)
barttext = nil;
}
int
dircmp(void *a, void *b)
{
Dirlist *da, *db;
int i, n;
da = *(Dirlist**)a;
db = *(Dirlist**)b;
n = min(da->nr, db->nr);
i = memcmp(da->r, db->r, n*sizeof(Rune));
if(i)
return i;
return da->nr - db->nr;
}
void
textcolumnate(Text *t, Dirlist **dlp, int ndl)
{
int i, j, w, colw, mint, maxt, ncol, nrow;
Dirlist *dl;
uint q1;
if(t->file->ntext > 1)
return;
mint = stringwidth(t->font, "0");
/* go for narrower tabs if set more than 3 wide */
t->maxtab = min(maxtab, TABDIR)*mint;
maxt = t->maxtab;
colw = 0;
for(i=0; i<ndl; i++){
dl = dlp[i];
w = dl->wid;
if(maxt-w%maxt < mint || w%maxt==0)
w += mint;
if(w % maxt)
w += maxt-(w%maxt);
if(w > colw)
colw = w;
}
if(colw == 0)
ncol = 1;
else
ncol = max(1, Dx(t->r)/colw);
nrow = (ndl+ncol-1)/ncol;
q1 = 0;
for(i=0; i<nrow; i++){
for(j=i; j<ndl; j+=nrow){
dl = dlp[j];
fileinsert(t->file, q1, dl->r, dl->nr);
q1 += dl->nr;
if(j+nrow >= ndl)
break;
w = dl->wid;
if(maxt-w%maxt < mint){
fileinsert(t->file, q1, L"\t", 1);
q1++;
w += mint;
}
do{
fileinsert(t->file, q1, L"\t", 1);
q1++;
w += maxt-(w%maxt);
}while(w < colw);
}
fileinsert(t->file, q1, L"\n", 1);
q1++;
}
}
uint
textload(Text *t, uint q0, char *file, int setqid)
{
Rune *rp;
Dirlist *dl, **dlp;
int fd, i, j, n, ndl, nulls;
uint q, q1;
Dir *d, *dbuf;
char *tmp;
Text *u;
if(t->ncache!=0 || t->file->nc || t->w==nil || t!=&t->w->body)
error("text.load");
if(t->w->isdir && t->file->nname==0){
warning(nil, "empty directory name\n");
return 0;
}
fd = open(file, OREAD);
if(fd < 0){
warning(nil, "can't open %s: %r\n", file);
return 0;
}
d = dirfstat(fd);
if(d == nil){
warning(nil, "can't fstat %s: %r\n", file);
goto Rescue;
}
nulls = FALSE;
if(d->qid.type & QTDIR){
/* this is checked in get() but it's possible the file changed underfoot */
if(t->file->ntext > 1){
warning(nil, "%s is a directory; can't read with multiple windows on it\n", file);
goto Rescue;
}
t->w->isdir = TRUE;
t->w->filemenu = FALSE;
if(t->file->name[t->file->nname-1] != '/'){
rp = runemalloc(t->file->nname+1);
runemove(rp, t->file->name, t->file->nname);
rp[t->file->nname] = '/';
winsetname(t->w, rp, t->file->nname+1);
free(rp);
}
dlp = nil;
ndl = 0;
dbuf = nil;
while((n=dirread(fd, &dbuf)) > 0){
for(i=0; i<n; i++){
dl = emalloc(sizeof(Dirlist));
j = strlen(dbuf[i].name);
tmp = emalloc(j+1+1);
memmove(tmp, dbuf[i].name, j);
if(dbuf[i].qid.type & QTDIR)
tmp[j++] = '/';
tmp[j] = '\0';
dl->r = bytetorune(tmp, &dl->nr);
dl->wid = stringwidth(t->font, tmp);
free(tmp);
ndl++;
dlp = realloc(dlp, ndl*sizeof(Dirlist*));
dlp[ndl-1] = dl;
}
free(dbuf);
}
qsort(dlp, ndl, sizeof(Dirlist*), dircmp);
t->w->dlp = dlp;
t->w->ndl = ndl;
textcolumnate(t, dlp, ndl);
q1 = t->file->nc;
}else{
t->w->isdir = FALSE;
t->w->filemenu = TRUE;
q1 = q0 + fileload(t->file, q0, fd, &nulls);
}
if(setqid){
t->file->dev = d->dev;
t->file->mtime = d->mtime;
t->file->qidpath = d->qid.path;
}
close(fd);
rp = fbufalloc();
for(q=q0; q<q1; q+=n){
n = q1-q;
if(n > RBUFSIZE)
n = RBUFSIZE;
bufread(t->file, q, rp, n);
if(q < t->org)
t->org += n;
else if(q <= t->org+t->nchars)
frinsert(t, rp, rp+n, q-t->org);
if(t->lastlinefull)
break;
}
fbuffree(rp);
for(i=0; i<t->file->ntext; i++){
u = t->file->text[i];
if(u != t){
if(u->org > u->file->nc) /* will be 0 because of reset(), but safety first */
u->org = 0;
textresize(u, u->all);
textbacknl(u, u->org, 0); /* go to beginning of line */
}
textsetselect(u, q0, q0);
}
if(nulls)
warning(nil, "%s: NUL bytes elided\n", file);
free(d);
return q1-q0;
Rescue:
close(fd);
return 0;
}
uint
textbsinsert(Text *t, uint q0, Rune *r, uint n, int tofile, int *nrp)
{
Rune *bp, *tp, *up;
int i, initial;
if(t->what == Tag){ /* can't happen but safety first: mustn't backspace over file name */
Err:
textinsert(t, q0, r, n, tofile);
*nrp = n;
return q0;
}
bp = r;
for(i=0; i<n; i++)
if(*bp++ == '\b'){
--bp;
initial = 0;
tp = runemalloc(n);
runemove(tp, r, i);
up = tp+i;
for(; i<n; i++){
*up = *bp++;
if(*up == '\b')
if(up == tp)
initial++;
else
--up;
else
up++;
}
if(initial){
if(initial > q0)
initial = q0;
q0 -= initial;
textdelete(t, q0, q0+initial, tofile);
}
n = up-tp;
textinsert(t, q0, tp, n, tofile);
free(tp);
*nrp = n;
return q0;
}
goto Err;
}
void
textinsert(Text *t, uint q0, Rune *r, uint n, int tofile)
{
int c, i;
Text *u;
if(tofile && t->ncache != 0)
error("text.insert");
if(n == 0)
return;
if(tofile){
fileinsert(t->file, q0, r, n);
if(t->what == Body){
t->w->dirty = TRUE;
t->w->utflastqid = -1;
}
if(t->file->ntext > 1)
for(i=0; i<t->file->ntext; i++){
u = t->file->text[i];
if(u != t){
u->w->dirty = TRUE; /* always a body */
textinsert(u, q0, r, n, FALSE);
textsetselect(u, u->q0, u->q1);
textscrdraw(u);
}
}
}
if(q0 < t->q1)
t->q1 += n;
if(q0 < t->q0)
t->q0 += n;
if(q0 < t->org)
t->org += n;
else if(q0 <= t->org+t->nchars)
frinsert(t, r, r+n, q0-t->org);
if(t->w){
c = 'i';
if(t->what == Body)
c = 'I';
if(n <= EVENTSIZE)
winevent(t->w, "%c%d %d 0 %d %.*S\n", c, q0, q0+n, n, n, r);
else
winevent(t->w, "%c%d %d 0 0 \n", c, q0, q0+n, n);
}
}
void
textfill(Text *t)
{
Rune *rp;
int i, n, m, nl;
if(t->lastlinefull || t->nofill)
return;
if(t->ncache > 0){
if(t->w != nil)
wincommit(t->w, t);
else
textcommit(t, TRUE);
}
rp = fbufalloc();
do{
n = t->file->nc-(t->org+t->nchars);
if(n == 0)
break;
if(n > 2000) /* educated guess at reasonable amount */
n = 2000;
bufread(t->file, t->org+t->nchars, rp, n);
/*
* it's expensive to frinsert more than we need, so
* count newlines.
*/
nl = t->maxlines-t->nlines;
m = 0;
for(i=0; i<n; ){
if(rp[i++] == '\n'){
m++;
if(m >= nl)
break;
}
}
frinsert(t, rp, rp+i, t->nchars);
}while(t->lastlinefull == FALSE);
fbuffree(rp);
}
void
textdelete(Text *t, uint q0, uint q1, int tofile)
{
uint n, p0, p1;
int i, c;
Text *u;
if(tofile && t->ncache != 0)
error("text.delete");
n = q1-q0;
if(n == 0)
return;
if(tofile){
filedelete(t->file, q0, q1);
if(t->what == Body){
t->w->dirty = TRUE;
t->w->utflastqid = -1;
}
if(t->file->ntext > 1)
for(i=0; i<t->file->ntext; i++){
u = t->file->text[i];
if(u != t){
u->w->dirty = TRUE; /* always a body */
textdelete(u, q0, q1, FALSE);
textsetselect(u, u->q0, u->q1);
textscrdraw(u);
}
}
}
if(q0 < t->q0)
t->q0 -= min(n, t->q0-q0);
if(q0 < t->q1)
t->q1 -= min(n, t->q1-q0);
if(q1 <= t->org)
t->org -= n;
else if(q0 < t->org+t->nchars){
p1 = q1 - t->org;
if(p1 > t->nchars)
p1 = t->nchars;
if(q0 < t->org){
t->org = q0;
p0 = 0;
}else
p0 = q0 - t->org;
frdelete(t, p0, p1);
textfill(t);
}
if(t->w){
c = 'd';
if(t->what == Body)
c = 'D';
winevent(t->w, "%c%d %d 0 0 \n", c, q0, q1);
}
}
void
textconstrain(Text *t, uint q0, uint q1, uint *p0, uint *p1)
{
*p0 = min(q0, t->file->nc);
*p1 = min(q1, t->file->nc);
}
Rune
textreadc(Text *t, uint q)
{
Rune r;
if(t->cq0<=q && q<t->cq0+t->ncache)
r = t->cache[q-t->cq0];
else
bufread(t->file, q, &r, 1);
return r;
}
int
textbswidth(Text *t, Rune c)
{
uint q, eq;
Rune r;
int skipping;
/* there is known to be at least one character to erase */
if(c == 0x08) /* ^H: erase character */
return 1;
q = t->q0;
skipping = TRUE;
while(q > 0){
r = textreadc(t, q-1);
if(r == '\n'){ /* eat at most one more character */
if(q == t->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 t->q0-q;
}
int
textfilewidth(Text *t, uint q0, int oneelement)
{
uint q;
Rune r;
q = q0;
while(q > 0){
r = textreadc(t, q-1);
if(r <= ' ')
break;
if(oneelement && r=='/')
break;
--q;
}
return q0-q;
}
Rune*
textcomplete(Text *t)
{
int i, nstr, npath;
uint q;
Rune tmp[200];
Rune *str, *path;
Rune *rp;
Completion *c;
char *s, *dirs;
Runestr dir;
/* control-f: filename completion; works back to white space or / */
if(t->q0<t->file->nc && textreadc(t, t->q0)>' ') /* must be at end of word */
return nil;
nstr = textfilewidth(t, t->q0, TRUE);
str = runemalloc(nstr);
npath = textfilewidth(t, t->q0-nstr, FALSE);
path = runemalloc(npath);
c = nil;
rp = nil;
dirs = nil;
q = t->q0-nstr;
for(i=0; i<nstr; i++)
str[i] = textreadc(t, q++);
q = t->q0-nstr-npath;
for(i=0; i<npath; i++)
path[i] = textreadc(t, q++);
/* is path rooted? if not, we need to make it relative to window path */
if(npath>0 && path[0]=='/')
dir = (Runestr){path, npath};
else{
dir = dirname(t, nil, 0);
if(dir.nr + 1 + npath > nelem(tmp)){
free(dir.r);
goto Return;
}
if(dir.nr == 0){
dir.nr = 1;
dir.r = runestrdup(L".");
}
runemove(tmp, dir.r, dir.nr);
tmp[dir.nr] = '/';
runemove(tmp+dir.nr+1, path, npath);
free(dir.r);
dir.r = tmp;
dir.nr += 1+npath;
dir = cleanrname(dir);
}
s = smprint("%.*S", nstr, str);
dirs = smprint("%.*S", dir.nr, dir.r);
c = complete(dirs, s);
free(s);
if(c == nil){
warning(nil, "error attempting completion: %r\n");
goto Return;
}
if(!c->advance){
warning(nil, "%.*S%s%.*S*%s\n",
dir.nr, dir.r,
dir.nr>0 && dir.r[dir.nr-1]!='/' ? "/" : "",
nstr, str,
c->nmatch? "" : ": no matches in:");
for(i=0; i<c->nfile; i++)
warning(nil, " %s\n", c->filename[i]);
}
if(c->advance)
rp = runesmprint("%s", c->string);
else
rp = nil;
Return:
freecompletion(c);
free(dirs);
free(str);
free(path);
return rp;
}
void
texttype(Text *t, Rune r)
{
uint q0, q1;
int nnb, nb, n, i;
int nr;
Rune *rp;
Text *u;
if(t->what!=Body && r=='\n')
return;
nr = 1;
rp = &r;
switch(r){
case Kleft:
if(t->q0 > 0){
textcommit(t, TRUE);
textshow(t, t->q0-1, t->q0-1, TRUE);
}
return;
case Kright:
if(t->q1 < t->file->nc){
textcommit(t, TRUE);
textshow(t, t->q1+1, t->q1+1, TRUE);
}
return;
case Kdown:
n = t->maxlines/3;
goto case_Down;
case Kpgdown:
n = 2*t->maxlines/3;
case_Down:
q0 = t->org+frcharofpt(t, Pt(t->r.min.x, t->r.min.y+n*t->font->height));
textsetorigin(t, q0, FALSE);
return;
case Kup:
n = t->maxlines/3;
goto case_Up;
case Kpgup:
n = 2*t->maxlines/3;
case_Up:
q0 = textbacknl(t, t->org, n);
textsetorigin(t, q0, FALSE);
return;
case Khome:
textshow(t, 0, 0, FALSE);
return;
case Kend:
if(t->w)
wincommit(t->w, t);
else
textcommit(t, TRUE);
textshow(t, t->file->nc, t->file->nc, FALSE);
return;
}
if(t->what == Body){
seq++;
filemark(t->file);
}
if(t->q1 > t->q0){
if(t->ncache != 0)
error("text.type");
cut(t, t, nil, TRUE, TRUE, nil, 0);
t->eq0 = ~0;
}
textshow(t, t->q0, t->q0, 1);
switch(r){
case 0x06:
case Kins:
rp = textcomplete(t);
if(rp == nil)
return;
nr = runestrlen(rp);
break; /* fall through to normal insertion case */
case 0x1B:
if(t->eq0 != ~0)
textsetselect(t, t->eq0, t->q0);
if(t->ncache > 0){
if(t->w != nil)
wincommit(t->w, t);
else
textcommit(t, TRUE);
}
return;
case 0x08: /* ^H: erase character */
case 0x15: /* ^U: erase line */
case 0x17: /* ^W: erase word */
if(t->q0 == 0) /* nothing to erase */
return;
nnb = textbswidth(t, r);
q1 = t->q0;
q0 = q1-nnb;
/* if selection is at beginning of window, avoid deleting invisible text */
if(q0 < t->org){
q0 = t->org;
nnb = q1-q0;
}
if(nnb <= 0)
return;
for(i=0; i<t->file->ntext; i++){
u = t->file->text[i];
u->nofill = TRUE;
nb = nnb;
n = u->ncache;
if(n > 0){
if(q1 != u->cq0+n)
error("text.type backspace");
if(n > nb)
n = nb;
u->ncache -= n;
textdelete(u, q1-n, q1, FALSE);
nb -= n;
}
if(u->eq0==q1 || u->eq0==~0)
u->eq0 = q0;
if(nb && u==t)
textdelete(u, q0, q0+nb, TRUE);
if(u != t)
textsetselect(u, u->q0, u->q1);
else
textsetselect(t, q0, q0);
u->nofill = FALSE;
}
for(i=0; i<t->file->ntext; i++)
textfill(t->file->text[i]);
return;
case '\n':
if(t->w->autoindent){
/* find beginning of previous line using backspace code */
nnb = textbswidth(t, 0x15); /* ^U case */
rp = runemalloc(nnb + 1);
nr = 0;
rp[nr++] = r;
for(i=0; i<nnb; i++){
r = textreadc(t, t->q0-nnb+i);
if(r != ' ' && r != '\t')
break;
rp[nr++] = r;
}
}
break; /* fall through to normal code */
}
/* otherwise ordinary character; just insert, typically in caches of all texts */
for(i=0; i<t->file->ntext; i++){
u = t->file->text[i];
if(u->eq0 == ~0)
u->eq0 = t->q0;
if(u->ncache == 0)
u->cq0 = t->q0;
else if(t->q0 != u->cq0+u->ncache)
error("text.type cq1");
textinsert(u, t->q0, rp, nr, FALSE);
if(u != t)
textsetselect(u, u->q0, u->q1);
if(u->ncache+nr > u->ncachealloc){
u->ncachealloc += 10 + nr;
u->cache = runerealloc(u->cache, u->ncachealloc);
}
runemove(u->cache+u->ncache, rp, nr);
u->ncache += nr;
}
if(rp != &r)
free(rp);
textsetselect(t, t->q0+nr, t->q0+nr);
if(r=='\n' && t->w!=nil)
wincommit(t->w, t);
}
void
textcommit(Text *t, int tofile)
{
if(t->ncache == 0)
return;
if(tofile)
fileinsert(t->file, t->cq0, t->cache, t->ncache);
if(t->what == Body){
t->w->dirty = TRUE;
t->w->utflastqid = -1;
}
t->ncache = 0;
}
static Text *clicktext;
static uint clickmsec;
static Text *selecttext;
static uint selectq;
/*
* called from frame library
*/
void
framescroll(Frame *f, int dl)
{
if(f != &selecttext->Frame)
error("frameselect not right frame");
textframescroll(selecttext, dl);
}
void
textframescroll(Text *t, int dl)
{
uint q0;
if(dl == 0){
scrsleep(100);
return;
}
if(dl < 0){
q0 = textbacknl(t, t->org, -dl);
if(selectq > t->org+t->p0)
textsetselect(t, t->org+t->p0, selectq);
else
textsetselect(t, selectq, t->org+t->p0);
}else{
if(t->org+t->nchars == t->file->nc)
return;
q0 = t->org+frcharofpt(t, Pt(t->r.min.x, t->r.min.y+dl*t->font->height));
if(selectq > t->org+t->p1)
textsetselect(t, t->org+t->p1, selectq);
else
textsetselect(t, selectq, t->org+t->p1);
}
textsetorigin(t, q0, TRUE);
}
void
textselect(Text *t)
{
uint q0, q1;
int b, x, y;
int state;
selecttext = t;
/*
* To have double-clicking and chording, we double-click
* immediately if it might make sense.
*/
b = mouse->buttons;
q0 = t->q0;
q1 = t->q1;
selectq = t->org+frcharofpt(t, mouse->xy);
if(clicktext==t && mouse->msec-clickmsec<500)
if(q0==q1 && selectq==q0){
textdoubleclick(t, &q0, &q1);
textsetselect(t, q0, q1);
flushimage(display, 1);
x = mouse->xy.x;
y = mouse->xy.y;
/* stay here until something interesting happens */
do
readmouse(mousectl);
while(mouse->buttons==b && abs(mouse->xy.x-x)<3 && abs(mouse->xy.y-y)<3);
mouse->xy.x = x; /* in case we're calling frselect */
mouse->xy.y = y;
q0 = t->q0; /* may have changed */
q1 = t->q1;
selectq = q0;
}
if(mouse->buttons == b){
t->Frame.scroll = framescroll;
frselect(t, mousectl);
/* horrible botch: while asleep, may have lost selection altogether */
if(selectq > t->file->nc)
selectq = t->org + t->p0;
t->Frame.scroll = nil;
if(selectq < t->org)
q0 = selectq;
else
q0 = t->org + t->p0;
if(selectq > t->org+t->nchars)
q1 = selectq;
else
q1 = t->org+t->p1;
}
if(q0 == q1){
if(q0==t->q0 && clicktext==t && mouse->msec-clickmsec<500){
textdoubleclick(t, &q0, &q1);
clicktext = nil;
}else{
clicktext = t;
clickmsec = mouse->msec;
}
}else
clicktext = nil;
textsetselect(t, q0, q1);
flushimage(display, 1);
state = 0; /* undo when possible; +1 for cut, -1 for paste */
while(mouse->buttons){
mouse->msec = 0;
b = mouse->buttons;
if(b & 6){
if(state==0 && t->what==Body){
seq++;
filemark(t->w->body.file);
}
if(b & 2){
if(state==-1 && t->what==Body){
winundo(t->w, TRUE);
textsetselect(t, q0, t->q0);
state = 0;
}else if(state != 1){
cut(t, t, nil, TRUE, TRUE, nil, 0);
state = 1;
}
}else{
if(state==1 && t->what==Body){
winundo(t->w, TRUE);
textsetselect(t, q0, t->q1);
state = 0;
}else if(state != -1){
paste(t, t, nil, TRUE, FALSE, nil, 0);
state = -1;
}
}
textscrdraw(t);
clearmouse();
}
flushimage(display, 1);
while(mouse->buttons == b)
readmouse(mousectl);
clicktext = nil;
}
}
void
textshow(Text *t, uint q0, uint q1, int doselect)
{
int qe;
int nl;
uint q;
if(t->what != Body)
return;
if(t->w!=nil && t->maxlines==0)
colgrow(t->col, t->w, 1);
if(doselect)
textsetselect(t, q0, q1);
qe = t->org+t->nchars;
if(t->org<=q0 && (q0<qe || (q0==qe && qe==t->file->nc+t->ncache)))
textscrdraw(t);
else{
if(t->w->nopen[QWevent] > 0)
nl = 3*t->maxlines/4;
else
nl = t->maxlines/4;
q = textbacknl(t, q0, nl);
/* avoid going backwards if trying to go forwards - long lines! */
if(!(q0>t->org && q<t->org))
textsetorigin(t, q, TRUE);
while(q0 > t->org+t->nchars)
textsetorigin(t, t->org+1, FALSE);
}
}
static
int
region(int a, int b)
{
if(a < b)
return -1;
if(a == b)
return 0;
return 1;
}
void
selrestore(Frame *f, Point pt0, uint p0, uint p1)
{
if(p1<=f->p0 || p0>=f->p1){
/* no overlap */
frdrawsel0(f, pt0, p0, p1, f->cols[BACK], f->cols[TEXT]);
return;
}
if(p0>=f->p0 && p1<=f->p1){
/* entirely inside */
frdrawsel0(f, pt0, p0, p1, f->cols[HIGH], f->cols[HTEXT]);
return;
}
/* they now are known to overlap */
/* before selection */
if(p0 < f->p0){
frdrawsel0(f, pt0, p0, f->p0, f->cols[BACK], f->cols[TEXT]);
p0 = f->p0;
pt0 = frptofchar(f, p0);
}
/* after selection */
if(p1 > f->p1){
frdrawsel0(f, frptofchar(f, f->p1), f->p1, p1, f->cols[BACK], f->cols[TEXT]);
p1 = f->p1;
}
/* inside selection */
frdrawsel0(f, pt0, p0, p1, f->cols[HIGH], f->cols[HTEXT]);
}
void
textsetselect(Text *t, uint q0, uint q1)
{
int p0, p1;
/* t->p0 and t->p1 are always right; t->q0 and t->q1 may be off */
t->q0 = q0;
t->q1 = q1;
/* compute desired p0,p1 from q0,q1 */
p0 = q0-t->org;
p1 = q1-t->org;
if(p0 < 0)
p0 = 0;
if(p1 < 0)
p1 = 0;
if(p0 > t->nchars)
p0 = t->nchars;
if(p1 > t->nchars)
p1 = t->nchars;
if(p0==t->p0 && p1==t->p1)
return;
/* screen disagrees with desired selection */
if(t->p1<=p0 || p1<=t->p0 || p0==p1 || t->p1==t->p0){
/* no overlap or too easy to bother trying */
frdrawsel(t, frptofchar(t, t->p0), t->p0, t->p1, 0);
frdrawsel(t, frptofchar(t, p0), p0, p1, 1);
goto Return;
}
/* overlap; avoid unnecessary painting */
if(p0 < t->p0){
/* extend selection backwards */
frdrawsel(t, frptofchar(t, p0), p0, t->p0, 1);
}else if(p0 > t->p0){
/* trim first part of selection */
frdrawsel(t, frptofchar(t, t->p0), t->p0, p0, 0);
}
if(p1 > t->p1){
/* extend selection forwards */
frdrawsel(t, frptofchar(t, t->p1), t->p1, p1, 1);
}else if(p1 < t->p1){
/* trim last part of selection */
frdrawsel(t, frptofchar(t, p1), p1, t->p1, 0);
}
Return:
t->p0 = p0;
t->p1 = p1;
}
/*
* Release the button in less than DELAY ms and it's considered a null selection
* if the mouse hardly moved, regardless of whether it crossed a char boundary.
*/
enum {
DELAY = 2,
MINMOVE = 4,
};
uint
xselect(Frame *f, Mousectl *mc, Image *col, uint *p1p) /* when called, button is down */
{
uint p0, p1, q, tmp;
ulong msec;
Point mp, pt0, pt1, qt;
int reg, b;
mp = mc->xy;
b = mc->buttons;
msec = mc->msec;
/* remove tick */
if(f->p0 == f->p1)
frtick(f, frptofchar(f, f->p0), 0);
p0 = p1 = frcharofpt(f, mp);
pt0 = frptofchar(f, p0);
pt1 = frptofchar(f, p1);
reg = 0;
frtick(f, pt0, 1);
do{
q = frcharofpt(f, mc->xy);
if(p1 != q){
if(p0 == p1)
frtick(f, pt0, 0);
if(reg != region(q, p0)){ /* crossed starting point; reset */
if(reg > 0)
selrestore(f, pt0, p0, p1);
else if(reg < 0)
selrestore(f, pt1, p1, p0);
p1 = p0;
pt1 = pt0;
reg = region(q, p0);
if(reg == 0)
frdrawsel0(f, pt0, p0, p1, col, display->white);
}
qt = frptofchar(f, q);
if(reg > 0){
if(q > p1)
frdrawsel0(f, pt1, p1, q, col, display->white);
else if(q < p1)
selrestore(f, qt, q, p1);
}else if(reg < 0){
if(q > p1)
selrestore(f, pt1, p1, q);
else
frdrawsel0(f, qt, q, p1, col, display->white);
}
p1 = q;
pt1 = qt;
}
if(p0 == p1)
frtick(f, pt0, 1);
flushimage(f->display, 1);
readmouse(mc);
}while(mc->buttons == b);
if(mc->msec-msec < DELAY && p0!=p1
&& abs(mp.x-mc->xy.x)<MINMOVE
&& abs(mp.y-mc->xy.y)<MINMOVE) {
if(reg > 0)
selrestore(f, pt0, p0, p1);
else if(reg < 0)
selrestore(f, pt1, p1, p0);
p1 = p0;
}
if(p1 < p0){
tmp = p0;
p0 = p1;
p1 = tmp;
}
pt0 = frptofchar(f, p0);
if(p0 == p1)
frtick(f, pt0, 0);
selrestore(f, pt0, p0, p1);
/* restore tick */
if(f->p0 == f->p1)
frtick(f, frptofchar(f, f->p0), 1);
flushimage(f->display, 1);
*p1p = p1;
return p0;
}
int
textselect23(Text *t, uint *q0, uint *q1, Image *high, int mask)
{
uint p0, p1;
int buts;
p0 = xselect(t, mousectl, high, &p1);
buts = mousectl->buttons;
if((buts & mask) == 0){
*q0 = p0+t->org;
*q1 = p1+t->org;
}
while(mousectl->buttons)
readmouse(mousectl);
return buts;
}
int
textselect2(Text *t, uint *q0, uint *q1, Text **tp)
{
int buts;
*tp = nil;
buts = textselect23(t, q0, q1, but2col, 4);
if(buts & 4)
return 0;
if(buts & 1){ /* pick up argument */
*tp = argtext;
return 1;
}
return 1;
}
int
textselect3(Text *t, uint *q0, uint *q1)
{
int h;
h = (textselect23(t, q0, q1, but3col, 1|2) == 0);
return h;
}
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 };
static
Rune *left[] = {
left1,
left2,
left3,
nil
};
static
Rune *right[] = {
right1,
left2,
left3,
nil
};
void
textdoubleclick(Text *t, uint *q0, uint *q1)
{
int c, i;
Rune *r, *l, *p;
uint q;
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 = textreadc(t, q-1);
p = runestrchr(l, c);
if(p != nil){
if(textclickmatch(t, c, r[p-l], 1, &q))
*q1 = q-(c!='\n');
return;
}
/* try matching character to right, looking left */
if(q == t->file->nc)
c = '\n';
else
c = textreadc(t, q);
p = runestrchr(r, c);
if(p != nil){
if(textclickmatch(t, c, l[p-r], -1, &q)){
*q1 = *q0+(*q0<t->file->nc && c=='\n');
*q0 = q;
if(c!='\n' || q!=0 || textreadc(t, 0)=='\n')
(*q0)++;
}
return;
}
}
/* try filling out word to right */
while(*q1<t->file->nc && isalnum(textreadc(t, *q1)))
(*q1)++;
/* try filling out word to left */
while(*q0>0 && isalnum(textreadc(t, *q0-1)))
(*q0)--;
}
int
textclickmatch(Text *t, int cl, int cr, int dir, uint *q)
{
Rune c;
int nest;
nest = 1;
for(;;){
if(dir > 0){
if(*q == t->file->nc)
break;
c = textreadc(t, *q);
(*q)++;
}else{
if(*q == 0)
break;
(*q)--;
c = textreadc(t, *q);
}
if(c == cr){
if(--nest==0)
return 1;
}else if(c == cl)
nest++;
}
return cl=='\n' && nest==1;
}
uint
textbacknl(Text *t, uint p, uint n)
{
int i, j;
/* look for start of this line if n==0 */
if(n==0 && p>0 && textreadc(t, 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(textreadc(t, p-1)=='\n')
break;
}
return p;
}
void
textsetorigin(Text *t, 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<t->file->nc; i++){
if(textreadc(t, org) == '\n'){
org++;
break;
}
org++;
}
}
a = org-t->org;
fixup = 0;
if(a>=0 && a<t->nchars){
frdelete(t, 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<t->nchars){
n = t->org - org;
r = runemalloc(n);
bufread(t->file, org, r, n);
frinsert(t, r, r+n, 0);
free(r);
}else
frdelete(t, 0, t->nchars);
t->org = org;
textfill(t);
textscrdraw(t);
textsetselect(t, t->q0, t->q1);
if(fixup && t->p1 > t->p0)
frdrawsel(t, frptofchar(t, t->p1-1), t->p1-1, t->p1, 1);
}
void
textreset(Text *t)
{
t->file->seq = 0;
t->eq0 = ~0;
/* do t->delete(0, t->nc, TRUE) without building backup stuff */
textsetselect(t, t->org, t->org);
frdelete(t, 0, t->nchars);
t->org = 0;
t->q0 = 0;
t->q1 = 0;
filereset(t->file);
bufreset(t->file);
}
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