ref: 6632edc3102c6e436b9123f3515b86ff754626f6
dir: /vdiff.c/
#include <u.h>
#include <libc.h>
#include <plumb.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
#include <bio.h>
typedef struct Line Line;
typedef struct Col Col;
struct Line {
int t;
char *s;
char *f;
int l;
};
struct Col {
Image *bg;
Image *fg;
};
enum
{
Lfile = 0,
Lsep,
Ladd,
Ldel,
Lnone,
Ncols,
};
enum
{
Scrollwidth = 12,
Scrollgap = 2,
Margin = 8,
Hpadding = 4,
Vpadding = 2,
};
Mousectl *mctl;
Keyboardctl *kctl;
Rectangle sr;
Rectangle scrollr;
Rectangle scrposr;
Rectangle listr;
Rectangle textr;
Col cols[Ncols];
Col scrlcol;
int scrollsize;
int lineh;
int nlines;
int offset;
int scrolling;
int oldbuttons;
Line **lines;
int lsize;
int lcount;
int maxlength;
int Δpan;
const char ellipsis[] = "...";
void
plumb(char *f, int l)
{
int fd;
char wd[256], addr[300]={0};
fd = plumbopen("send", OWRITE);
if(fd<0)
return;
getwd(wd, sizeof wd);
snprint(addr, sizeof addr, "%s:%d", f, l);
plumbsendtext(fd, "vdiff", "edit", wd, addr);
close(fd);
}
void
drawline(Rectangle r, Line *l)
{
Point p;
Rune rn;
char *s;
int off, tab, nc;
draw(screen, r, cols[l->t].bg, nil, ZP);
p = Pt(r.min.x + Hpadding, r.min.y + (Dy(r)-font->height)/2);
off = Δpan / stringwidth(font, " ");
for(s = l->s, nc = -1, tab = 0; *s; nc++, tab--, off--){
if(tab <= 0 && *s == '\t'){
tab = 4 - nc % 4;
s++;
}
if(tab > 0){
if(off <= 0)
p = runestring(screen, p, cols[l->t].bg, ZP, font, L"█");
}else if((p.x+Hpadding+stringwidth(font, " ")+stringwidth(font, ellipsis)>=textr.max.x)){
string(screen, p, cols[l->t].fg, ZP, font, ellipsis);
break;
}else{
s += chartorune(&rn, s);
if(off <= 0)
p = runestringn(screen, p, cols[l->t].fg, ZP, font, &rn, 1);
}
}
}
void
redraw(void)
{
Rectangle lr;
int i, h, y;
draw(screen, sr, cols[Lnone].bg, nil, ZP);
draw(screen, scrollr, scrlcol.bg, nil, ZP);
if(lcount>0){
h = ((double)nlines/lcount)*Dy(scrollr);
y = ((double)offset/lcount)*Dy(scrollr);
scrposr = Rect(scrollr.min.x, scrollr.min.y+y, scrollr.max.x-1, scrollr.min.y+y+h);
}else
scrposr = Rect(scrollr.min.x, scrollr.min.y, scrollr.max.x-1, scrollr.max.y);
draw(screen, scrposr, scrlcol.fg, nil, ZP);
for(i=0; i<nlines && offset+i<lcount; i++){
lr = Rect(textr.min.x, textr.min.y+i*lineh, textr.max.x, textr.min.y+(i+1)*lineh);
drawline(lr, lines[offset+i]);
}
flushimage(display, 1);
}
void
pan(int off)
{
int max;
max = Hpadding + maxlength * stringwidth(font, " ") + 2 * stringwidth(font, ellipsis) - Dx(textr);
Δpan += off * stringwidth(font, " ");
if(Δpan < 0 || max <= 0)
Δpan = 0;
else if(Δpan > max)
Δpan = max;
redraw();
}
void
clampoffset(void)
{
if(offset<0)
offset = 0;
if(offset+nlines>lcount)
offset = lcount-nlines+1;
}
void
scroll(int off)
{
if(off<0 && offset<=0)
return;
if(off>0 && offset+nlines>lcount)
return;
offset += off;
clampoffset();
redraw();
}
int
indexat(Point p)
{
int n;
if (!ptinrect(p, textr))
return -1;
n = (p.y - textr.min.y) / lineh;
if ((n+offset) >= lcount)
return -1;
return n;
}
void
eresize(void)
{
if(getwindow(display, Refnone)<0)
sysfatal("cannot reattach: %r");
sr = screen->r;
scrollr = sr;
scrollr.max.x = scrollr.min.x+Scrollwidth+Scrollgap;
listr = sr;
listr.min.x = scrollr.max.x;
textr = insetrect(listr, Margin);
lineh = Vpadding+font->height+Vpadding;
nlines = Dy(textr)/lineh;
scrollsize = mousescrollsize(nlines);
if(offset > 0 && offset+nlines>lcount)
offset = lcount-nlines+1;
redraw();
}
void
ekeyboard(Rune k)
{
switch(k){
case 'q':
case Kdel:
threadexitsall(nil);
break;
case Khome:
scroll(-1000000);
break;
case Kend:
scroll(1000000);
break;
case Kpgup:
scroll(-nlines);
break;
case Kpgdown:
scroll(nlines);
break;
case Kup:
scroll(-1);
break;
case Kdown:
scroll(1);
break;
case Kleft:
pan(-4);
break;
case Kright:
pan(4);
break;
}
}
void
emouse(Mouse m)
{
int n;
if(oldbuttons == 0 && m.buttons != 0 && ptinrect(m.xy, scrollr))
scrolling = 1;
else if(m.buttons == 0)
scrolling = 0;
if(scrolling){
if(m.buttons&1){
n = (m.xy.y - scrollr.min.y) / lineh;
if(-n<lcount-offset){
scroll(-n);
} else {
scroll(-lcount+offset);
}
return;
}else if(m.buttons&2){
n = (m.xy.y - scrollr.min.y) * lcount / Dy(scrollr);
offset = n;
clampoffset();
redraw();
}else if(m.buttons&4){
n = (m.xy.y - scrollr.min.y) / lineh;
if(n<lcount-offset){
scroll(n);
} else {
scroll(lcount-offset);
}
return;
}
}else{
if(m.buttons&4){
n = indexat(m.xy);
if(n>=0 && lines[n+offset]->f != nil)
plumb(lines[n+offset]->f, lines[n+offset]->l);
}else if(m.buttons&8)
scroll(-scrollsize);
else if(m.buttons&16)
scroll(scrollsize);
}
oldbuttons = m.buttons;
}
void
initcol(Col *c, ulong fg, ulong bg)
{
c->fg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, fg);
c->bg = allocimage(display, Rect(0,0,1,1), screen->chan, 1, bg);
}
void
initcols(int black)
{
if(black){
initcol(&scrlcol, DBlack, 0x999999FF^(~0xFF));
initcol(&cols[Lfile], DWhite, 0x333333FF);
initcol(&cols[Lsep], DBlack, DPurpleblue);
initcol(&cols[Ladd], DWhite, 0x002800FF);
initcol(&cols[Ldel], DWhite, 0x3F0000FF);
initcol(&cols[Lnone], DWhite, DBlack);
}else{
initcol(&scrlcol, DWhite, 0x999999FF);
initcol(&cols[Lfile], DBlack, 0xEFEFEFFF);
initcol(&cols[Lsep], DBlack, 0xEAFFFFFF);
initcol(&cols[Ladd], DBlack, 0xE6FFEDFF);
initcol(&cols[Ldel], DBlack, 0xFFEEF0FF);
initcol(&cols[Lnone], DBlack, DWhite);
}
}
int
linetype(char *text)
{
int type;
type = Lnone;
if(strncmp(text, "+++", 3)==0)
type = Lfile;
else if(strncmp(text, "---", 3)==0){
if(strlen(text) > 4)
type = Lfile;
}else if(strncmp(text, "@@", 2)==0)
type = Lsep;
else if(strncmp(text, "+", 1)==0)
type = Ladd;
else if(strncmp(text, "-", 1)==0)
type = Ldel;
return type;
}
Line*
parseline(char *f, int n, char *s)
{
Line *l;
int len;
l = malloc(sizeof *l);
if(l==nil)
sysfatal("malloc: %r");
l->t = linetype(s);
l->s = s;
l->l = n;
if(l->t != Lfile && l->t != Lsep)
l->f = f;
else
l->f = nil;
len = strlen(s);
if(len > maxlength)
maxlength = len;
return l;
}
int
lineno(char *s)
{
char *p, *t[5];
int n, l;
p = strdup(s);
n = tokenize(p, t, 5);
if(n<=0)
return -1;
l = atoi(t[2]);
free(p);
return l;
}
void
parse(int fd)
{
Biobuf *bp;
Line *l;
char *s, *f, *t;
int n, ab;
ab = 0;
n = 0;
f = nil;
lsize = 64;
lcount = 0;
lines = malloc(lsize * sizeof *lines);
if(lines==nil)
sysfatal("malloc: %r");
bp = Bfdopen(fd, OREAD);
if(bp==nil)
sysfatal("Bfdopen: %r");
for(;;){
s = Brdstr(bp, '\n', 1);
if(s==nil)
break;
l = parseline(f, n, s);
if(l->t == Lfile && l->s[0] == '-' && strncmp(l->s+4, "a/", 2)==0)
ab = 1;
if(l->t == Lfile && l->s[0] == '+'){
f = l->s+4;
if(ab && strncmp(f, "b/", 2)==0){
f += 1;
if(access(f, AEXIST) < 0)
f += 1;
}
t = strchr(f, '\t');
if(t!=nil)
*t = 0;
}else if(l->t == Lsep)
n = lineno(l->s);
else if(l->t == Ladd || l->t == Lnone)
++n;
lines[lcount++] = l;
if(lcount>=lsize){
lsize *= 2;
lines = realloc(lines, lsize*sizeof *lines);
if(lines==nil)
sysfatal("realloc: %r");
}
}
}
void
usage(void)
{
fprint(2, "%s [-b]\n", argv0);
exits("usage");
}
void
threadmain(int argc, char *argv[])
{
enum { Emouse, Eresize, Ekeyboard, };
Mouse m;
Rune k;
Alt a[] = {
{ nil, &m, CHANRCV },
{ nil, nil, CHANRCV },
{ nil, &k, CHANRCV },
{ nil, nil, CHANEND },
};
int b;
scrolling = 0;
oldbuttons = 0;
b = 0;
ARGBEGIN{
case 'b':
b = 1;
break;
default:
usage();
break;
}ARGEND;
parse(0);
if(lcount==0){
fprint(2, "no diff\n");
exits(nil);
}
if(initdraw(nil, nil, "vdiff")<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;
initcols(b);
eresize();
for(;;){
switch(alt(a)){
case Emouse:
emouse(m);
break;
case Eresize:
eresize();
break;
case Ekeyboard:
ekeyboard(k);
break;
}
}
}