ref: df0d3ca805b9b630f674ad932a4fbacc793df2e2
dir: vexed/vexed.c
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include <mouse.h>
#include <keyboard.h>
#include <ctype.h>
#include "a.h"
void redraw(void);
void drawselchange(int);
enum
{
Emouse,
Eresize,
Ekeyboard,
};
enum
{
Padding = 4,
Spacing = 8,
Scrollwidth = 12,
};
enum { Mundo, Mredo, Minsert, Mappend, Mdelete, Mgoto, Mlook, Mnext };
char *menu2str[] = { "undo", "redo", "insert", "append", "delete", "goto", "look", "next", 0 };
Menu menu2 = { menu2str };
enum { Msave, Mquit, };
char *menu3str[] = { "save", "quit", 0 };
Menu menu3 = { menu3str };
const char *filename;
int modified;
Buffer buf;
int blines;
Mousectl *mctl;
Keyboardctl *kctl;
int sw;
int scrollsize;
Rectangle scrollr;
Rectangle viewr;
Rectangle statusr;
int nlines;
int offset;
int sel = 0;
uchar sbuf[255] = {0};
int nsbuf;
char sstr[256] = {0};
int sindex = -1;
int
hexval(Rune k)
{
int v;
if(isdigit(k))
v = k - '0';
else
v = 10 + tolower(k) - 'a';
return v;
}
int
search(int from)
{
char *s, *p;
int len, oldsel;
s = (char*)buf.data + from;
for(;;){
len = s - (char*)buf.data;
if(len >= buf.count)
break;
p = memchr(s, sbuf[0], buf.count - len);
if(p == nil || (nsbuf > 1 && memcmp(p, sbuf, nsbuf) != 0)){
s = p + 1;
continue;
}
oldsel = sel;
sel = p - (char*)buf.data;
drawselchange(oldsel);
sindex = sel;
return 1;
}
return 0;
}
void
xundo(void)
{
Undo u;
if(!canundo())
return;
undo(&u);
switch(u.action){
case Udelete:
if(insert(&buf, u.index) < 0)
sysfatal("insert: %r");
buf.data[u.index] = u.value;
break;
case Uinsert:
if(delete(&buf, u.index) < 0)
sysfatal("delete: %r");
break;
case Uappend:
if(delete(&buf, u.index + 1) < 0)
sysfatal("delete: %r");
break;
case Uset:
buf.data[u.index] = u.value;
break;
}
sel = u.index;
modified = u.modified;
blines = buf.count / 16;
redraw();
}
void
xredo(void)
{
Undo u;
if(!canredo())
return;
redo(&u);
switch(u.action){
case Udelete:
if(delete(&buf, u.index) < 0)
sysfatal("insert: %r");
sel = u.index;
break;
case Uinsert:
if(insert(&buf, u.index) < 0)
sysfatal("insert: %r");
sel = u.index;
break;
case Uappend:
if(insert(&buf, u.index + 1) < 0)
sysfatal("insert: %r");
sel = u.index + 1;
break;
case Uset:
buf.data[u.index] = u.newvalue;
break;
}
if(sel == buf.count)
--sel;
modified = 1;
blines = buf.count / 16;
redraw();
}
void
xgoto(void)
{
char b[16] = {0}, *endp;
int n;
if(enter("Address:", b, sizeof b, mctl, kctl, nil) <= 0)
return;
n = strtol(b, &endp, 0);
if(endp == nil || endp == b)
return;
if(n < 0 || n >= buf.count)
return;
sel = n;
redraw();
}
void
xdelete(void)
{
pushundo(Udelete, sel, buf.data[sel], 0, modified);
if(delete(&buf, sel) < 0)
sysfatal("delete: %r");
if(sel == buf.count)
--sel;
modified = 1;
blines = buf.count/16;
redraw();
}
void
xinsert(void)
{
pushundo(Uinsert, sel, 0, 0, modified);
if(insert(&buf, sel) < 0)
sysfatal("insert: %r");
modified = 1;
blines = buf.count/16;
redraw();
}
void
xappend(void)
{
pushundo(Uappend, sel, 0, 0, modified);
if(append(&buf, sel) < 0)
sysfatal("append: %r");
sel += 1;
modified = 1;
blines = buf.count/16;
redraw();
}
void
xlook(void)
{
char tmp[255] = {0};
int n, i;
n = enter("Look:", tmp, sizeof tmp, mctl, kctl, nil);
if(n <= 0)
return;
if(n%2 != 0){
showerr("invalid byte sequence", mctl, kctl);
return;
}
nsbuf = 0;
sindex = -1;
for(i = 0; i < n; i += 2){
if(!(isxdigit(tmp[i]) && isxdigit(tmp[i+1]))){
showerr("invalid character in byte sequence", mctl, kctl);
return;
}
sbuf[nsbuf++] = 16*hexval(tmp[i]) + hexval(tmp[i+1]);
}
sbuf[nsbuf] = 0;
snprint(sstr, sizeof sstr, "/%s", tmp);
if(!search(sel)){
sindex = -1;
}
}
void
xnext(void)
{
if(sindex == -1)
return;
if(!search(sindex + 1))
search(0);
}
int
selvisible(void)
{
int l;
l = sel/16;
return offset <= l && l < offset+nlines;
}
int
ensureselvisible(void)
{
if(selvisible())
return 0;
offset = sel/16;
return 1;
}
void
drawline(int line)
{
int y, index, i, n;
char b[8] = {0}, *s;
Point p;
Point p2;
y = viewr.min.y + line * font->height;
index = (line + offset)*16;
if(index >= buf.count)
return;
draw(screen, Rect(viewr.min.x, y, viewr.max.x, y + font->height), cols[BACK], nil, ZP);
p = Pt(viewr.min.x, y);
if(index/16 == sel/16){
n = snprint(b, sizeof b, "%06X", sel);
p = stringnbg(screen, p, cols[BACK], ZP, font, b, n, cols[ADDR], ZP);
}else{
n = snprint(b, sizeof b, "%06X", index);
p = stringn(screen, p, cols[ADDR], ZP, font, b, n);
}
p.x += 2*Spacing;
p2 = addpt(p, Pt(16*3*sw - sw + 2*Spacing, 0));
for(i = 0; i < 16; i++) {
if(index + i >= buf.count)
break;
n = snprint(b, sizeof b, "%02X", buf.data[index + i]);
s = isprint(buf.data[index + i]) ? (char*)&buf.data[index + i] : ".";
if(index + i == sel){
p = stringnbg(screen, p, cols[BACK], ZP, font, b, n, cols[HEX], ZP);
p2 = stringnbg(screen, p2, cols[BACK], ZP, font, s, 1, cols[ASCII], ZP);
}else{
p = stringn(screen, p, cols[HEX], ZP, font, b, n);
p2 = stringn(screen, p2, cols[ASCII], ZP, font, s, 1);
}
p = stringn(screen, p, cols[BACK], ZP, font, " ", 1);
}
}
void
drawselchange(int oldsel)
{
int ol, nl;
if(ensureselvisible())
redraw();
else{
ol = oldsel/16 - offset;
nl = sel/16 - offset;
if(ol != nl)
drawline(ol);
drawline(nl);
flushimage(display, 1);
}
}
void
drawstatus(void)
{
char b[16] = {0};
Point p;
int x;
draw(screen, statusr, cols[BACK], nil, ZP);
p = string(screen, Pt(statusr.min.x + Padding, statusr.min.y), cols[HEX], ZP, font, filename);
if(modified)
string(screen, p, cols[SCROLL], ZP, font, " (modified)");
snprint(b, sizeof b, "%d%%", (int)((100.0 * sel) / buf.count + 0.5));
x = statusr.max.x - stringwidth(font, b) - Padding;
string(screen, Pt(x, statusr.min.y), cols[HEX], ZP, font, b);
}
void
redraw(void)
{
int i, h, y, ye;
Rectangle scrposr;
draw(screen, screen->r, cols[BACK], nil, ZP);
draw(screen, scrollr, cols[SCROLL], nil, ZP);
border(screen, scrollr, 0, cols[HEX], ZP);
if(blines > 0){
h = ((double)nlines / blines) * Dy(scrollr);
y = ((double)offset / blines) * Dy(scrollr);
ye = scrollr.min.y + y + h - 1;
if(ye >= scrollr.max.y)
ye = scrollr.max.y - 1;
scrposr = Rect(scrollr.min.x + 1, scrollr.min.y + y + 1, scrollr.max.x - 1, ye);
}else
scrposr = insetrect(scrollr, -1);
draw(screen, scrposr, cols[BACK], nil, ZP);
for(i = 0; i < nlines; i++)
drawline(i);
drawstatus();
flushimage(display, 1);
}
int
scroll(int lines)
{
if(blines <= nlines)
return 0;
if(lines < 0 && offset == 0)
return 0;
if(lines > 0 && offset + nlines >= blines){
return 0;
}
offset += lines;
if(offset < 0)
offset = 0;
if(offset + blines%nlines >= blines)
offset = blines - blines%nlines;
sel += lines * 16;
if(sel < 0)
sel = 0;
else if(sel >= buf.count)
sel = buf.count - 1;
redraw();
return 1;
}
int
indexat(Point p)
{
int row, col, index;
row = (p.y - viewr.min.y) / font->height;
col = ((p.x - viewr.min.x) / sw - 8);
if(col < 0 || col > 16*3*sw)
return -1;
index = col/3 + row*16 + offset*16;
if(index >= buf.count)
return -1;
return index;
}
void
menu2hit(void)
{
int n;
menu2str[Mnext] = sindex == -1 ? nil : sstr;
n = menuhit(2, mctl, &menu2, nil);
switch(n){
case Mundo:
xundo();
break;
case Mredo:
xredo();
break;
case Mgoto:
xgoto();
break;
case Mdelete:
xdelete();
break;
case Minsert:
xinsert();
break;
case Mappend:
xappend();
break;
case Mlook:
xlook();
break;
case Mnext:
xnext();
break;
}
}
void
menu3hit(void)
{
int n;
n = menuhit(3, mctl, &menu3, nil);
switch(n){
case Msave:
if(!modified)
return;
if(writefile(&buf, filename) < 0)
sysfatal("writefile: %r");
modified = 0;
redraw();
break;
case Mquit:
threadexitsall(nil);
break;
}
}
void
emouse(Mouse *m)
{
int n;
if(ptinrect(m->xy, scrollr)){
if(m->buttons == 1){
n = (m->xy.y - scrollr.min.y) / font->height;
scroll(-n);
}else if(m->buttons == 2){
n = (m->xy.y - scrollr.min.y) * blines / Dy(scrollr);
offset = n;
sel = offset*16;
redraw();
}else if(m->buttons == 4){
n = (m->xy.y - scrollr.min.y) / font->height;
scroll(n);
}
} else if(ptinrect(m->xy, viewr)){
if(m->buttons == 1){
n = indexat(m->xy);
if(n >= 0){
sel = n;
redraw();
}
}else if(m->buttons == 2){
menu2hit();
}else if(m->buttons == 4){
menu3hit();
}else if(m->buttons == 8){
scroll(-scrollsize);
}else if(m->buttons == 16){
scroll(scrollsize);
}
}
}
void
eresize(void)
{
int w, x;
statusr = Rect(screen->r.min.x + Padding, screen->r.max.y - Padding - font->height, screen->r.max.x - Padding, screen->r.max.y - Padding);
scrollr = Rect(screen->r.min.x + Padding, screen->r.min.y + Padding, screen->r.min.x + Padding + Scrollwidth, statusr.min.y - Padding);
sw = stringwidth(font, " ");
w = Padding + 6*sw + 2*Spacing + 16*3*sw-sw + 2*Spacing + 16*sw + Padding;
x = scrollr.max.x + Padding;
viewr = Rect(x, screen->r.min.y + Padding, x + w, statusr.min.y - Padding);
nlines = Dy(viewr) / font->height;
scrollsize = mousescrollsize(nlines);
redraw();
flushimage(display, 1);
}
void
ekeyboard(Rune k)
{
static long lastk = 0;
static int lastv;
long e;
int oldsel;
if(!isxdigit(k))
lastv = -1;
e = time(nil);
oldsel = sel;
switch(k){
case 'q':
case Kdel:
threadexitsall(nil);
break;
case Kpgup:
scroll(-nlines);
break;
case Kpgdown:
scroll(nlines);
break;
case Kleft:
if(sel > 0){
oldsel = sel;
sel--;
drawselchange(oldsel);
}
break;
case Kright:
if(sel < (buf.count - 1)){
sel++;
drawselchange(oldsel);
}
break;
case Kup:
if(sel >= 16){
sel -= 16;
drawselchange(oldsel);
}
break;
case Kdown:
if(sel < (buf.count - 16)){
sel += 16;
drawselchange(oldsel);
}
break;
case Khome:
if(sel != 0){
sel = 0;
drawselchange(oldsel);
}
break;
case Kend:
if(sel != buf.count - 1){
sel = buf.count - 1;
if(!selvisible())
offset = blines - blines%nlines;
redraw();
}
break;
case 'u':
case 'U':
xundo();
break;
case 'r':
case 'R':
xredo();
break;
case 'g':
case 'G':
xgoto();
break;
case 'x':
case 'X':
xdelete();
break;
case 'i':
case 'I':
xinsert();
break;
case 'p':
case 'P':
xappend();
break;
case 'l':
case 'L':
xlook();
break;
case 'n':
case 'N':
xnext();
break;
default:
if(isxdigit(k)){
if(e - lastk < 2 && lastv > 0) {
buf.data[sel] = lastv*16 + hexval(k);
patchundo(buf.data[sel]);
lastv = -1;
}else{
lastv = hexval(k);
pushundo(Uset, sel, buf.data[sel], lastv, modified);
buf.data[sel] = lastv;
}
modified = 1;
drawselchange(oldsel);
drawstatus();
}else{
lastv = -1;
}
}
lastk = e;
}
void
usage(void)
{
fprint(2, "usage: %s [-b] <filename>\n", argv0);
threadexitsall("usage");
}
void
threadmain(int argc, char *argv[])
{
Mouse m;
Rune k;
Alt alts[] = {
{ nil, &m, CHANRCV },
{ nil, nil, CHANRCV },
{ nil, &k, CHANRCV },
{ nil, nil, CHANEND },
};
int reverse;
reverse = 0;
ARGBEGIN{
case 'b':
reverse = 1;
break;
default:
usage();
}ARGEND;
if(*argv == nil)
usage();
filename = *argv;
modified = 0;
if(readfile(&buf, filename) < 0)
sysfatal("readfile: %r");
blines = buf.count/16;
if(initdraw(nil, nil, argv0) < 0)
sysfatal("initdraw: %r");
display->locking = 0;
if((mctl = initmouse(nil, screen)) == nil)
sysfatal("initmouse: %r");
if((kctl = initkeyboard(nil)) == nil)
sysfatal("initkeyboard: %r");
initcols(reverse);
alts[Emouse].c = mctl->c;
alts[Eresize].c = mctl->resizec;
alts[Ekeyboard].c = kctl->c;
eresize();
for(;;){
switch(alt(alts)){
case Emouse:
emouse(&m);
break;
case Eresize:
if(getwindow(display, Refnone) < 0)
sysfatal("getwindow: %r");
eresize();
break;
case Ekeyboard:
ekeyboard(k);
break;
}
}
}