void
_frclean(Frame *f, Point pt, int n0, int n1) /* look for mergeable boxes */
{
Frbox *b;
int nb, c;
c = f->r.max.x;
for(nb=n0; nb<n1-1; nb++){
b = &f->box[nb];
_frcklinewrap(f, &pt, b);
while(b[0].nrune>=0 && nb<n1-1 && b[1].nrune>=0 && pt.x+b[0].wid+b[1].wid<c){
_frmergebox(f, nb);
n1--;
b = &f->box[nb];
}
_fradvance(f, &pt, &f->box[nb]);
}
for(; nb<f->nbox; nb++){
b = &f->box[nb];
_frcklinewrap(f, &pt, b);
_fradvance(f, &pt, &f->box[nb]);
}
f->lastlinefull = 0;
if(pt.y >= f->r.max.y)
f->lastlinefull = 1;
}
Point
frdrawsel0(Frame *f, Point pt, ulong p0, ulong p1, Image *back, Image *text)
{
Frbox *b;
int nb, nr, w, x, trim;
Point qt;
uint p;
char *ptr;
p = 0;
b = f->box;
trim = 0;
for(nb=0; nb<f->nbox && p<p1; nb++){
nr = b->nrune;
if(nr < 0)
nr = 1;
if(p+nr <= p0)
goto Continue;
if(p >= p0){
qt = pt;
_frcklinewrap(f, &pt, b);
/* fill in the end of a wrapped line */
if(pt.y > qt.y)
draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
}
ptr = (char*)b->ptr;
if(p < p0){ /* beginning of region: advance into box */
ptr += nbytes(ptr, p0-p);
nr -= (p0-p);
p = p0;
}
trim = 0;
if(p+nr > p1){ /* end of region: trim box */
nr -= (p+nr)-p1;
trim = 1;
}
if(b->nrune<0 || nr==b->nrune)
w = b->wid;
else
w = stringnwidth(f->font, ptr, nr);
x = pt.x+w;
if(x > f->r.max.x)
x = f->r.max.x;
draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
if(b->nrune >= 0)
stringnbg(f->b, pt, text, ZP, f->font, ptr, nr, back, ZP);
pt.x += w;
Continue:
b++;
p += nr;
}
/* if this is end of last plain text box on wrapped line, fill to end of line */
if(p1>p0 && b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){
qt = pt;
_frcklinewrap(f, &pt, b);
if(pt.y > qt.y)
draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
}
return pt;
}
void
_frdrawtext(Frame *f, Point pt, Image *text, Image *back)
{
Frbox *b;
int nb;
for(nb=0,b=f->box; nb<f->nbox; nb++, b++){
_frcklinewrap(f, &pt, b);
if(!f->noredraw && b->nrune >= 0)
stringbg(f->b, pt, text, ZP, f->font, (char*)b->ptr, back, ZP);
pt.x += b->wid;
}
}
