void
textfill(Text *t)
{
Rune *rp;
int i, n, m, nl;
if(t->lastlinefull || t->nofill)
return;
if(t->ncache > 0)
typecommit(t);
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
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){
typecommit(t);
textshow(t, t->q0-1, t->q0-1, TRUE);
}
return;
case Kright:
if(t->q1 < t->file->nc){
typecommit(t);
textshow(t, t->q1+1, t->q1+1, TRUE);
}
return;
case Kdown:
n = t->maxlines/3;
goto case_Down;
case Kscrollonedown:
n = mousescrollsize(t->maxlines);
if(n <= 0)
n = 1;
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, TRUE);
return;
case Kup:
n = t->maxlines/3;
goto case_Up;
case Kscrolloneup:
n = mousescrollsize(t->maxlines);
goto case_Up;
case Kpgup:
n = 2*t->maxlines/3;
case_Up:
q0 = textbacknl(t, t->org, n);
textsetorigin(t, q0, TRUE);
return;
case Khome:
typecommit(t);
textshow(t, 0, 0, FALSE);
return;
case Kend:
typecommit(t);
textshow(t, t->file->nc, t->file->nc, FALSE);
return;
case 0x01: /* ^A: beginning of line */
typecommit(t);
/* go to where ^U would erase, if not already at BOL */
nnb = 0;
if(t->q0>0 && textreadc(t, t->q0-1)!='\n')
nnb = textbswidth(t, 0x15);
textshow(t, t->q0-nnb, t->q0-nnb, TRUE);
return;
case 0x05: /* ^E: end of line */
typecommit(t);
q0 = t->q0;
while(q0<t->file->nc && textreadc(t, q0)!='\n')
q0++;
textshow(t, q0, q0, TRUE);
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)
typecommit(t);
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
texttype(Text *t, Rune r)
{
uint q0, q1;
int nnb, nb, n, i;
int nr;
Rune *rp;
Text *u;
if(t->what!=Body && t->what!=Tag && r=='\n')
return;
if(t->what == Tag)
t->w->tagsafe = FALSE;
nr = 1;
rp = &r;
switch(r){
case Kleft:
typecommit(t);
if(t->q0 > 0)
textshow(t, t->q0-1, t->q0-1, TRUE);
return;
case Kright:
typecommit(t);
if(t->q1 < t->file->b.nc)
textshow(t, t->q1+1, t->q1+1, TRUE);
return;
case Kdown:
if(t->what == Tag)
goto Tagdown;
n = t->fr.maxlines/3;
goto case_Down;
case Kscrollonedown:
if(t->what == Tag)
goto Tagdown;
n = mousescrollsize(t->fr.maxlines);
if(n <= 0)
n = 1;
goto case_Down;
case Kpgdown:
n = 2*t->fr.maxlines/3;
case_Down:
q0 = t->org+frcharofpt(&t->fr, Pt(t->fr.r.min.x, t->fr.r.min.y+n*t->fr.font->height));
textsetorigin(t, q0, TRUE);
return;
case Kup:
if(t->what == Tag)
goto Tagup;
n = t->fr.maxlines/3;
goto case_Up;
case Kscrolloneup:
if(t->what == Tag)
goto Tagup;
n = mousescrollsize(t->fr.maxlines);
goto case_Up;
case Kpgup:
n = 2*t->fr.maxlines/3;
case_Up:
q0 = textbacknl(t, t->org, n);
textsetorigin(t, q0, TRUE);
return;
case Khome:
typecommit(t);
if(t->org > t->iq1) {
q0 = textbacknl(t, t->iq1, 1);
textsetorigin(t, q0, TRUE);
} else
textshow(t, 0, 0, FALSE);
return;
case Kend:
typecommit(t);
if(t->iq1 > t->org+t->fr.nchars) {
if(t->iq1 > t->file->b.nc) {
// should not happen, but does. and it will crash textbacknl.
t->iq1 = t->file->b.nc;
}
q0 = textbacknl(t, t->iq1, 1);
textsetorigin(t, q0, TRUE);
} else
textshow(t, t->file->b.nc, t->file->b.nc, FALSE);
return;
case 0x01: /* ^A: beginning of line */
typecommit(t);
/* go to where ^U would erase, if not already at BOL */
nnb = 0;
if(t->q0>0 && textreadc(t, t->q0-1)!='\n')
nnb = textbswidth(t, 0x15);
textshow(t, t->q0-nnb, t->q0-nnb, TRUE);
return;
case 0x05: /* ^E: end of line */
typecommit(t);
q0 = t->q0;
while(q0<t->file->b.nc && textreadc(t, q0)!='\n')
q0++;
textshow(t, q0, q0, TRUE);
return;
case Kcmd+'c': /* %C: copy */
typecommit(t);
cut(t, t, nil, TRUE, FALSE, nil, 0);
return;
case Kcmd+'z': /* %Z: undo */
typecommit(t);
undo(t, nil, nil, TRUE, 0, nil, 0);
return;
Tagdown:
/* expand tag to show all text */
if(!t->w->tagexpand){
t->w->tagexpand = TRUE;
winresize(t->w, t->w->r, FALSE, TRUE);
}
return;
Tagup:
/* shrink tag to single line */
if(t->w->tagexpand){
t->w->tagexpand = FALSE;
t->w->taglines = 1;
winresize(t->w, t->w->r, FALSE, TRUE);
}
return;
}
if(t->what == Body){
seq++;
filemark(t->file);
}
/* cut/paste must be done after the seq++/filemark */
switch(r){
case Kcmd+'x': /* %X: cut */
typecommit(t);
if(t->what == Body){
seq++;
filemark(t->file);
}
cut(t, t, nil, TRUE, TRUE, nil, 0);
textshow(t, t->q0, t->q0, 1);
t->iq1 = t->q0;
return;
case Kcmd+'v': /* %V: paste */
typecommit(t);
if(t->what == Body){
seq++;
filemark(t->file);
}
paste(t, t, nil, TRUE, FALSE, nil, 0);
textshow(t, t->q0, t->q1, 1);
t->iq1 = t->q1;
return;
}
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: /* ^F: complete */
case Kins:
typecommit(t);
rp = textcomplete(t);
if(rp == nil)
return;
nr = runestrlen(rp);
break; /* fall through to normal insertion case */
case 0x1B:
if(t->eq0 != ~0) {
if(t->eq0 <= t->q0)
textsetselect(t, t->eq0, t->q0);
else
textsetselect(t, t->q0, t->eq0);
}
if(t->ncache > 0)
typecommit(t);
t->iq1 = t->q0;
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]);
t->iq1 = t->q0;
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");
/*
* Change the tag before we add to ncache,
* so that if the window body is resized the
* commit will not find anything in ncache.
*/
if(u->what==Body && u->ncache == 0){
u->needundo = TRUE;
winsettag(t->w);
u->needundo = FALSE;
}
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);
t->iq1 = t->q0;
}
