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#include <u.h>
#include <libc.h>
#include <draw.h>
#include <mouse.h>
#include <frame.h>
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;
}
}
static int
nbytes(char *s0, int nr)
{
char *s;
Rune r;
s = s0;
while(--nr >= 0)
s += chartorune(&r, s);
return s-s0;
}
void
frdrawsel(Frame *f, Point pt, ulong p0, ulong p1, int issel)
{
Image *back, *text;
if(f->ticked)
frtick(f, frptofchar(f, f->p0), 0);
if(p0 == p1){
frtick(f, pt, issel);
return;
}
if(issel){
back = f->cols[HIGH];
text = f->cols[HTEXT];
}else{
back = f->cols[BACK];
text = f->cols[TEXT];
}
frdrawsel0(f, pt, p0, p1, back, text);
}
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;
if(p0 > p1)
sysfatal("libframe: frdrawsel0 p0=%lud > p1=%lud", p0, p1);
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
frredraw(Frame *f)
{
int ticked;
Point pt;
if(f->p0 == f->p1){
ticked = f->ticked;
if(ticked)
frtick(f, frptofchar(f, f->p0), 0);
frdrawsel0(f, frptofchar(f, 0), 0, f->nchars, f->cols[BACK], f->cols[TEXT]);
if(ticked)
frtick(f, frptofchar(f, f->p0), 1);
return;
}
pt = frptofchar(f, 0);
pt = frdrawsel0(f, pt, 0, f->p0, f->cols[BACK], f->cols[TEXT]);
pt = frdrawsel0(f, pt, f->p0, f->p1, f->cols[HIGH], f->cols[HTEXT]);
pt = frdrawsel0(f, pt, f->p1, f->nchars, f->cols[BACK], f->cols[TEXT]);
}
static void
_frtick(Frame *f, Point pt, int ticked)
{
Rectangle r;
if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
return;
pt.x -= f->tickscale; /* looks best just left of where requested */
r = Rect(pt.x, pt.y, pt.x+FRTICKW*f->tickscale, pt.y+f->font->height);
/* can go into left border but not right */
if(r.max.x > f->r.max.x)
r.max.x = f->r.max.x;
if(ticked){
draw(f->tickback, f->tickback->r, f->b, nil, pt);
draw(f->b, r, f->tick, nil, ZP);
}else
draw(f->b, r, f->tickback, nil, ZP);
f->ticked = ticked;
}
void
frtick(Frame *f, Point pt, int ticked)
{
if(f->tickscale != scalesize(f->display, 1)) {
if(f->ticked)
_frtick(f, pt, 0);
frinittick(f);
}
_frtick(f, pt, ticked);
}
Point
_frdraw(Frame *f, Point pt)
{
Frbox *b;
int nb, n;
for(b=f->box,nb=0; nb<f->nbox; nb++, b++){
_frcklinewrap0(f, &pt, b);
if(pt.y == f->r.max.y){
f->nchars -= _frstrlen(f, nb);
_frdelbox(f, nb, f->nbox-1);
break;
}
if(b->nrune > 0){
n = _frcanfit(f, pt, b);
if(n == 0)
break;
if(n != b->nrune){
_frsplitbox(f, nb, n);
b = &f->box[nb];
}
pt.x += b->wid;
}else{
if(b->bc == '\n'){
pt.x = f->r.min.x;
pt.y+=f->font->height;
}else
pt.x += _frnewwid(f, pt, b);
}
}
return pt;
}
int
_frstrlen(Frame *f, int nb)
{
int n;
for(n=0; nb<f->nbox; nb++)
n += NRUNE(&f->box[nb]);
return n;
}
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