ref: 738be8c36f9f2765894a526f69ec043e483002b3
dir: /sys/src/libdraw/enter.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
int
enter(char *ask, char *buf, int len, Mousectl *mc, Keyboardctl *kc, Screen *scr)
{
int done, down, tick, n, h, w, l, i;
Image *b, *save, *backcol, *bordcol, *txtcol;
Point p, o, t;
Rectangle r, sc;
Alt a[3];
Mouse m;
Rune k;
o = screen->r.min;
enum{
Cback,
Cbord,
Ctext,
Ncols,
};
Theme th[Ncols] = {
[Cback] { "menuback", 0xEAFFEAFF },
[Cbord] { "menubord", DMedgreen },
[Ctext] { "menutext", DBlack },
};
readtheme(th, nelem(th), nil);
backcol = allocimage(display, Rect(0,0,1,1), screen->chan, 1, th[Cback].c);
bordcol = allocimage(display, Rect(0,0,1,1), screen->chan, 1, th[Cbord].c);
txtcol = allocimage(display, Rect(0,0,1,1), screen->chan, 1, th[Ctext].c);
if(backcol == nil || bordcol == nil || txtcol == nil)
return -1;
sc = screen->clipr;
replclipr(screen, 0, screen->r);
n = 0;
if(kc){
while(nbrecv(kc->c, nil) == 1)
;
a[n].op = CHANRCV;
a[n].c = kc->c;
a[n].v = &k;
n++;
}
if(mc){
o = mc->xy;
a[n].op = CHANRCV;
a[n].c = mc->c;
a[n].v = &m;
n++;
}
a[n].op = CHANEND;
a[n].c = nil;
a[n].v = nil;
if(buf && len > 0)
n = strlen(buf);
else {
buf = nil;
len = 0;
n = 0;
}
k = -1;
b = nil;
tick = n;
save = nil;
done = down = 0;
p = stringsize(font, " ");
h = p.y;
w = p.x;
while(!done){
p = stringsize(font, buf ? buf : "");
if(ask && ask[0]){
if(buf) p.x += w;
p.x += stringwidth(font, ask);
}
r = rectaddpt(insetrect(Rpt(ZP, p), -4), o);
p.x = 0;
r = rectsubpt(r, p);
p = ZP;
if(r.min.x < screen->r.min.x)
p.x = screen->r.min.x - r.min.x;
if(r.min.y < screen->r.min.y)
p.y = screen->r.min.y - r.min.y;
r = rectaddpt(r, p);
p = ZP;
if(r.max.x > screen->r.max.x)
p.x = r.max.x - screen->r.max.x;
if(r.max.y > screen->r.max.y)
p.y = r.max.y - screen->r.max.y;
r = rectsubpt(r, p);
r = insetrect(r, -2);
if(scr){
if(b == nil)
b = allocwindow(scr, r, Refbackup, DWhite);
if(b == nil)
scr = nil;
}
if(scr == nil && save == nil){
if(b == nil)
b = screen;
save = allocimage(display, r, b->chan, 0, DNofill);
if(save == nil){
n = -1;
break;
}
draw(save, r, b, nil, r.min);
}
draw(b, r, backcol, nil, ZP);
border(b, r, 2, bordcol, ZP);
p = addpt(r.min, Pt(6, 6));
if(ask && ask[0]){
p = string(b, p, bordcol, ZP, font, ask);
if(buf) p.x += w;
}
if(buf){
t = p;
p = stringn(b, p, txtcol, ZP, font, buf, utfnlen(buf, tick));
draw(b, Rect(p.x-1, p.y, p.x+2, p.y+3), txtcol, nil, ZP);
draw(b, Rect(p.x, p.y, p.x+1, p.y+h), txtcol, nil, ZP);
draw(b, Rect(p.x-1, p.y+h-3, p.x+2, p.y+h), txtcol, nil, ZP);
p = string(b, p, txtcol, ZP, font, buf+tick);
}
flushimage(display, 1);
nodraw:
switch(alt(a)){
case -1:
done = 1;
n = -1;
break;
case 0:
if(buf == nil || k == Keof || k == '\n'){
done = 1;
break;
}
if(k == Knack || k == Kesc){
done = !n;
buf[n = tick = 0] = 0;
break;
}
if(k == Ksoh || k == Khome){
tick = 0;
continue;
}
if(k == Kenq || k == Kend){
tick = n;
continue;
}
if(k == Kright){
if(tick < n)
tick += chartorune(&k, buf+tick);
continue;
}
if(k == Kleft){
for(i = 0; i < n; i += l){
l = chartorune(&k, buf+i);
if(i+l >= tick){
tick = i;
break;
}
}
continue;
}
if(k == Ketb){
l = tick;
while(tick > 0){
tick--;
if(tick == 0 ||
strchr(" !\"#$%&'()*+,-./:;<=>?@`[\\]^{|}~", buf[tick-1]))
break;
}
memmove(buf+tick, buf+l, n-l);
buf[n -= l-tick] = 0;
break;
}
if(k == Kbs){
if(tick <= 0)
continue;
for(i = 0; i < n; i += l){
l = chartorune(&k, buf+i);
if(i+l >= tick){
memmove(buf+i, buf+i+l, n - (i+l));
buf[n -= l] = 0;
tick -= l;
break;
}
}
break;
}
if(k < 0x20 || k == Kdel || (k & 0xFF00) == KF || (k & 0xFF00) == Spec)
continue;
if((len-n) <= (l = runelen(k)))
continue;
memmove(buf+tick+l, buf+tick, n - tick);
runetochar(buf+tick, &k);
buf[n += l] = 0;
tick += l;
break;
case 1:
if(!ptinrect(m.xy, r)){
down = 0;
goto nodraw;
}
if(m.buttons & 7){
down = 1;
if(buf && m.xy.x >= (t.x - w)){
down = 0;
for(i = 0; i < n; i += l){
l = chartorune(&k, buf+i);
t.x += stringnwidth(font, buf+i, 1);
if(t.x > m.xy.x)
break;
}
tick = i;
}
continue;
}
done = down;
break;
}
if(b != screen) {
freeimage(b);
b = nil;
} else {
draw(b, save->r, save, nil, save->r.min);
freeimage(save);
save = nil;
}
}
replclipr(screen, 0, sc);
freeimage(backcol);
freeimage(bordcol);
flushimage(display, 1);
return n;
}