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
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]);
}
void
frdrawsel(Frame *f, Point pt, uint32_t p0, uint32_t 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);
}
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;
}