ref: e70384ae3f39d03a0ef488083f7b4851e5933d3d
dir: /main.c/
#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <bio.h>
#include <thread.h>
#include <draw.h>
#include <mouse.h>
#include <keyboard.h>
#include <plumb.h>
#include "a.h"
enum
{
Emouse,
Eresize,
Ekeyboard,
};
enum
{
Maxlines = 4096,
Tickw = 3,
Padding = 4,
Scrollwidth = 12,
};
Mousectl *mctl;
Keyboardctl *kctl;
Image *selbg;
Image *mfg;
Image *tick;
Rectangle ir;
Rectangle sr;
Rectangle lr;
int lh;
int lcount;
int loff;
int lsel;
int pmode;
int plumbfd;
char* lines[Maxlines];
int nlines;
Match matches[Maxlines];
int nmatches;
char input[255] = {0};
int ninput = 0;
char pwd[255] = {0};
int
matchcmp(void *a, void *b)
{
Match m, n;
m = *(Match*)a;
n = *(Match*)b;
return n.score - m.score;
}
void
match(char *pat)
{
int i, s;
nmatches = 0;
for(i = 0; i < nlines; i++){
s = fuzzymatch(pat, lines[i]);
if(s >= 0){
matches[nmatches].name = lines[i];
matches[nmatches].score = s;
nmatches++;
}
}
if(nmatches > 0)
qsort(matches, nmatches, sizeof(Match), matchcmp);
}
void
loadlines(void)
{
Biobuf *bp;
char *s;
nlines = 0;
bp = Bfdopen(0, OREAD);
for(;;){
s = Brdstr(bp, '\n', 1);
if(s == nil)
break;
lines[nlines++] = s;
matches[nmatches++].name = s;
if(nlines >= Maxlines)
break;
}
Bterm(bp);
}
void
activate(void)
{
Match m;
m = matches[lsel + loff];
if(pmode){
print("%s", m.name);
threadexitsall(nil);
}
plumbsendtext(plumbfd, argv0, nil, pwd, m.name);
}
int
lineat(Point p)
{
if(ptinrect(p, lr) == 0)
return -1;
return (p.y - lr.min.y) / lh;
}
Rectangle
linerect(int i)
{
Rectangle r;
r.min.x = 0;
r.min.y = i * (font->height + Padding);
r.max.x = Dx(lr) - 2*Padding;
r.max.y = (i + 1) * (font->height + Padding);
r = rectaddpt(r, lr.min);
return r;
}
void
drawline(int i, int sel)
{
if(loff + i >= nmatches)
return;
draw(screen, linerect(i), sel ? selbg : display->white, nil, ZP);
string(screen, addpt(lr.min, Pt(0, i * lh)), display->black, ZP, font, matches[loff + i].name);
}
void
redraw(void)
{
char b[10] = {0};
Point p;
Rectangle r, scrposr;
int i, h, y, ye;
draw(screen, screen->r, display->white, nil, ZP);
p = string(screen, addpt(screen->r.min, Pt(Padding, Padding)), display->black, ZP, font, "> ");
p = stringn(screen, p, display->black, ZP, font, input, ninput);
r = Rect(p.x, p.y, p.x + Dx(tick->r), p.y + Dy(tick->r));
draw(screen, r, tick, nil, ZP);
draw(screen, sr, mfg, nil, ZP);
border(screen, sr, 0, display->black, ZP);
if(nmatches > 0){
h = ((double)lcount / nmatches) * Dy(sr);
y = ((double)loff / nmatches) * Dy(sr);
ye = sr.min.y + y + h - 1;
if(ye >= sr.max.y)
ye = sr.max.y - 1;
scrposr = Rect(sr.min.x + 1, sr.min.y + y + 1, sr.max.x - 1, ye);
}else
scrposr = insetrect(sr, -1);
draw(screen, scrposr, display->white, nil, ZP);
for(i = 0; i < lcount; i++)
drawline(i, i == lsel);
i = snprint(b, sizeof b, "%d/%d", nmatches, nlines);
b[i] = 0;
p = Pt(screen->r.max.x - Padding - stringwidth(font, b), screen->r.min.y + Padding);
string(screen, p, mfg, ZP, font, b);
flushimage(display, 1);
}
int
scroll(int lines, int setsel)
{
if(nmatches <= lcount)
return 0;
if(lines < 0 && loff == 0)
return 0;
if(lines > 0 && loff + lcount >= nmatches)
return 0;
loff += lines;
if(loff < 0)
loff = 0;
if(loff + lcount >= nmatches)
loff = nmatches - nmatches%lcount;
if(setsel){
if(lines > 0)
lsel = 0;
else
lsel = lcount - 1;
}
redraw();
return 1;
}
void
inputchanged(void)
{
int i;
input[ninput] = 0;
if(ninput > 0){
match(input);
}else{
nmatches = 0;
for(i = 0; i < nlines; i++)
matches[nmatches++].name = lines[i];
}
if(lsel >= (nmatches - 1))
lsel = 0;
if(nmatches == 0)
lsel = -1;
loff = 0;
redraw();
}
void
changesel(int from, int to)
{
drawline(from, 0);
drawline(to, 1);
flushimage(display, 1);
}
void
eresize(void)
{
ir = Rect(Padding, Padding, screen->r.max.x - Padding, Padding + font->height + Padding);
ir = rectaddpt(ir, screen->r.min);
sr = Rect(screen->r.min.x + Padding, ir.max.y, screen->r.min.x + Padding + Scrollwidth, screen->r.max.y - Padding - 1);
lr = Rect(sr.max.x + 2*Padding, ir.max.y, ir.max.x, screen->r.max.y - Padding);
lh = font->height + Padding;
lcount = Dy(lr) / lh;
redraw();
}
void
emouse(Mouse *m)
{
int n;
if(m->buttons == 1){
if((n = lineat(m->xy)) != -1){
changesel(lsel, n);
lsel = n;
}
}else if(m->buttons == 4){
activate();
}
}
void
ekeyboard(Rune k)
{
int osel;
switch(k){
case Kdel:
threadexitsall(nil);
break;
case Kup:
if(lsel == 0 && loff > 0)
scroll(-lcount, 1);
else if(lsel > 0)
changesel(lsel, --lsel);
break;
case Kdown:
if(lsel < (nmatches - 1)){
if(lsel == lcount - 1)
scroll(lcount, 1);
else if(loff + lsel < nmatches - 1)
changesel(lsel, ++lsel);
}
break;
case Kpgup:
scroll(-lcount, 1);
break;
case Kpgdown:
scroll(lcount, 1);
break;
case Khome:
osel = lsel;
lsel = 0;
if(scroll(-nmatches, 0) == 0)
changesel(osel, lsel);
break;
case Kend:
osel = lsel;
lsel = nmatches%lcount - 1;
if(scroll(nmatches, 0) == 0){
changesel(osel, lsel);
}
break;
case '\n':
if(lsel >= 0)
activate();
break;
case Kesc:
if(ninput > 0){
ninput = 0;
inputchanged();
}else
threadexitsall(nil);
break;
case Kbs:
if(ninput > 0){
ninput--;
inputchanged();
}
break;
case Knack: /* ^U */
if(ninput > 0){
ninput = 0;
inputchanged();
}
default:
if(isprint(k) && ninput < (sizeof input - 1)){
input[ninput++] = (char)k; /* XXX */
inputchanged();
}
}
}
Image*
createtick(void)
{
Image *t;
t = allocimage(display, Rect(0, 0, Tickw, font->height), screen->chan, 0, DWhite);
if(t == nil)
return 0;
/* background color */
draw(t, t->r, display->white, nil, ZP);
/* vertical line */
draw(t, Rect(Tickw/2, 0, Tickw/2+1, font->height), display->black, nil, ZP);
/* box on each end */
draw(t, Rect(0, 0, Tickw, Tickw), display->black, nil, ZP);
draw(t, Rect(0, font->height-Tickw, Tickw, font->height), display->black, nil, ZP);
return t;
}
void
usage(void)
{
fprint(2, "usage: %s [-p]\n", argv0);
exits("usage");
}
void
threadmain(int argc, char **argv)
{
Mouse m;
Rune k;
Alt a[] = {
{ nil, &m, CHANRCV },
{ nil, nil, CHANRCV },
{ nil, &k, CHANRCV },
{ nil, nil, CHANEND },
};
pmode = 0;
ARGBEGIN{
case 'p':
pmode = 1;
break;
default:
usage();
}ARGEND;
getwd(pwd, sizeof pwd);
if(pmode == 0){
plumbfd = plumbopen("send", OWRITE|OCEXEC);
if(plumbfd < 0)
sysfatal("plumbopen: %r");
}
loadlines();
if(initdraw(nil, nil, "fm") < 0)
sysfatal("initdraw: %r");
display->locking = 0;
if((mctl = initmouse(nil, screen)) == nil)
sysfatal("initmouse: %r");
if((kctl = initkeyboard(nil)) == nil)
sysfatal("initkeyboard: %r");
a[Emouse].c = mctl->c;
a[Eresize].c = mctl->resizec;
a[Ekeyboard].c = kctl->c;
tick = createtick();
selbg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xEFEFEFFF);
mfg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0x999999FF);
loff = 0;
lsel = 0;
eresize();
for(;;){
switch(alt(a)){
case Emouse:
emouse(&m);
break;
case Eresize:
if(getwindow(display, Refnone) < 0)
sysfatal("getwindow: %r");
eresize();
break;
case Ekeyboard:
ekeyboard(k);
break;
}
}
}