ref: c40b9d21694a42dbf9cbcc25dd52ab4dd9751fcf
dir: /plan9.c/
#include "plan9.h"
#include "field.h"
#include "gbuffer.h"
#include "sim.h"
#include <bio.h>
#include <draw.h>
#include <mouse.h>
#include <keyboard.h>
#include <thread.h>
#define MIN(x,y) ((x)<(y)?(x):(y))
#define MAX(x,y) ((x)>(y)?(x):(y))
enum {
Txtoff = 16,
Coloff = 2,
Cchar = 0,
Ckey,
Cmouse,
Cresize,
Credraw,
Numchan,
Minsert = 0,
Mappend,
Mslide,
Mselect,
};
typedef struct Key Key;
static struct {
u8int u[4];
Usz at;
}noteoff[16*128]; /* 16 channels, 128 notes each */
struct Key {
int down;
Rune rune;
};
static Rune *linebuf;
static Usz tick;
static int gridw = 8, gridh = 8;
static int bpm = 120, pause;
static int curx, cury;
static int selw = 1, selh = 1;
static Image *curbg;
static int charw, charh;
static Field field;
static Mbuf_reusable mbuf;
static Oevent_list events;
static char filename[256];
static Channel *cchan;
static Field copyfield;
static int altdown;
static int mode = Minsert;
static long framedev; /* frame deviation >= 1µs */
static char *modes[] = {
[Minsert] = "insert",
[Mappend] = "append",
[Mslide] = "slide",
[Mselect] = "select",
};
static char *menu3i[] = {
"load",
"save",
nil,
};
static Menu menu3 = {
.item = menu3i,
};
Usz
orca_round_up_power2(Usz x)
{
x -= 1;
x |= x >> 1;
x |= x >> 2;
x |= x >> 4;
x |= x >> 8;
x |= x >> 16;
return x + 1;
}
bool
orca_is_valid_glyph(Glyph c)
{
if (c >= '0' && c <= '9')
return true;
if (c >= 'A' && c <= 'Z')
return true;
if (c >= 'a' && c <= 'z')
return true;
switch (c) {
case '!':
case '#':
case '%':
case '*':
case '.':
case ':':
case ';':
case '=':
case '?':
return true;
}
return false;
}
static void
process(Oevent_list *events)
{
int i, off;
Oevent *e;
u8int u[4];
for (e = events->buffer, i = 0; i < events->count; i++, e++) {
if (e->any.oevent_type == Oevent_type_midi_note) {
Oevent_midi_note const *n = &e->midi_note;
u[0] = 1;
u[1] = 0x90 | n->channel;
u[2] = (n->octave + 1)*12 + n->note;
u[3] = n->velocity;
write(1, u, 4);
off = n->channel*128 + u[2];
noteoff[off].u[1] = 0x80 | n->channel;
noteoff[off].u[2] = u[2];
noteoff[off].u[3] = 0;
noteoff[off].at = tick + n->duration;
}
}
for (i = 0; i < nelem(noteoff); i++) {
if (noteoff[i].at > 0 && noteoff[i].at < tick) {
write(1, noteoff[i].u, 4);
noteoff[i].at = 0;
}
}
}
/*
* nsec() is wallclock and can be adjusted by timesync
* so need to use cycles() instead
*
* "fasthz" is how many ticks there are in a second
* can be read from /dev/time
*/
static uvlong
nanosec(void)
{
static double fasthz = 0.0;
uvlong x;
int f, n, i;
char tmp[128], *e;
if (fasthz < 1.0) {
if ((f = open("/dev/time", OREAD)) < 0)
sysfatal("failed to open /dev/time");
if ((n = read(f, tmp, sizeof(tmp)-1)) < 2)
sysfatal("failed to read /dev/time");
tmp[n] = 0;
e = tmp;
for (i = 0; i < 3; i++)
strtoll(e, &e, 10);
fasthz = strtod(e, nil);
if (fasthz < 1.0)
sysfatal("failed to read fasthz");
close(f);
}
cycles(&x);
return (double)x / (fasthz / 1000000000.0);
}
static void
orcathread(void *drawchan)
{
vlong start, end, n, oldn;
vlong processold, processnew;
int w, h, oldbpm, fd;
char tmp[64];
threadsetname("orca/sim");
snprint(tmp, sizeof(tmp), "/proc/%d/ctl", getpid());
if((fd = open(tmp, OWRITE)) >= 0){
fprint(fd, "pri 13\n");
close(fd);
}
processnew = nanosec();
for (;;) {
start = nanosec();
w = field.width;
h = field.height;
mbuffer_clear(mbuf.buffer, h, w);
oevent_list_clear(&events);
orca_run(field.buffer, mbuf.buffer, h, w, tick, &events, 0);
processold = processnew;
processnew = nanosec();
process(&events);
tick++;
nbsendul(drawchan, 0);
oldn = start;
end = start + 1;
oldbpm = 0;
for (n = start; pause || n < end; n = nanosec()) {
if (bpm != oldbpm) {
end = start + 15000000000LL/bpm; /* 10^9 * 60 / 4 */
oldbpm = bpm;
}
/* doesn't suppose to jump back, but just in case do _something_ */
if (n < oldn)
end -= oldn - n;
oldn = n;
if (pause || end - n > 750000000LL)
sleep(70);
else if (end - n > 25000000LL)
sleep(20);
else if (end - n > 10000000LL)
sleep(1);
}
framedev = ((processnew - processold) - (15000000000LL / bpm)) / 1000LL;
}
}
static void
redraw(void)
{
Rectangle r;
Point p, top;
int x, y, len;
draw(screen, screen->r, display->black, nil, ZP);
p = screen->r.min;
p.x += Txtoff;
p.y += Txtoff;
top = p;
for (y = 0; y < field.height; y++) {
for (x = 0; x < field.width; x++) {
Rune c = field.buffer[field.width*y + x];
if (c == L'.')
c = L'·';
linebuf[x] = c;
}
linebuf[x] = 0;
runestring(screen, p, display->white, ZP, font, linebuf);
p.y += font->height;
}
p.y += 2 * font->height;
/* field size */
p.x = screen->r.min.x + Txtoff;
len = MAX(3+1+3, runesprint(linebuf, "%udx%ud", field.width, field.height));
runestring(screen, p, display->white, ZP, font, linebuf);
/* cursor position */
p.y += font->height;
runesprint(linebuf, "%ud,%ud", curx, cury);
runestring(screen, p, display->white, ZP, font, linebuf);
/* selection size */
p.x += charw * (len + Coloff);
len = MAX(2+1+2, runesprint(linebuf, "%d:%d", selw, selh));
runestring(screen, p, display->white, ZP, font, linebuf);
/* grid size */
p.y -= font->height;
runesprint(linebuf, "%d/%d", gridw, gridh);
runestring(screen, p, display->white, ZP, font, linebuf);
/* ticks */
p.x += charw * (len + Coloff);
runesprint(linebuf, "%ludf", tick);
runestring(screen, p, display->white, ZP, font, linebuf);
/* insert/append mode */
p.y += font->height;
len = MAX(6, runesprint(linebuf, "%s", modes[altdown ? Mslide : mode]));
runestring(screen, p, display->white, ZP, font, linebuf);
/* bpm */
p.y -= font->height;
p.x += charw * (len + Coloff);
len = MAX(6, runesprint(linebuf, "%d", bpm));
runestring(screen, p, display->white, ZP, font, linebuf);
/* filename */
p.y += font->height;
string(screen, p, display->white, ZP, font, filename[0] ? filename : "unnamed");
/* frame deviation */
p.y -= font->height;
p.x += charw * (len + Coloff);
len = MAX(6, runesprint(linebuf, "%ldµs", labs(framedev)));
runestring(screen, p, display->white, ZP, font, linebuf);
USED(len);
/* cursor bg */
p = top;
p.x += curx * charw;
p.y += cury * charh;
r.min = p;
r.max = p;
r.max.x += selw * charw;
r.max.y += selh * charh;
draw(screen, r, curbg, nil, ZP);
flushimage(display, 1);
}
static int
fieldload(char *path)
{
Field_load_error e;
if ((e = field_load_file(path, &field)) != Field_load_error_ok) {
werrstr(field_load_error_string(e));
return -1;
}
curx = MIN(curx, field.width-1);
cury = MIN(cury, field.height-1);
return 0;
}
static int
fieldsave(char *path)
{
FILE *f;
if ((f = fopen(path, "w")) == nil)
return -1;
field_fput(&field, f);
fclose(f);
return 0;
}
static void
selset(Rune key)
{
int y;
for (y = cury; y < cury+selh && y < field.height; y++)
memset(&field.buffer[curx + field.width*y], key, selw);
}
static void
selcopy(void)
{
Biobuf *b;
int y;
if ((b = Bopen("/dev/snarf", OWRITE)) != nil) {
for (y = cury; y < cury+selh && y < field.height; y++) {
Bwrite(b, &field.buffer[curx + field.width*y], MIN(selw, field.width-curx));
Bputc(b, '\n');
}
Bterm(b);
}
}
static void
selpaste(void)
{
Biobuf *b;
char *s;
int cols, rows, n;
if ((b = Bopen("/dev/snarf", OREAD)) != nil) {
for (cols = rows = 0; (s = Brdstr(b, '\n', 1)) != nil; rows++) {
if ((n = Blinelen(b)) > cols)
cols = n;
if (cury+rows < field.height)
memmove(&field.buffer[curx + field.width*(cury+rows)], s, MIN(n, field.width-curx));
free(s);
}
selw = MAX(1, cols);
selh = MAX(1, rows);
Bterm(b);
}
}
static void
fieldset(Rune key)
{
if (mode == Minsert) {
selset(key);
} else {
field.buffer[curx + field.width*cury] = key;
if (curx < field.width-1)
curx++;
}
}
static void
selmove(int x, int y)
{
int i;
if (curx+x < 0 || cury+y < 0)
return;
field_resize_raw(©field, selh, selw);
gbuffer_copy_subrect(
field.buffer,
copyfield.buffer,
field.height, field.width,
copyfield.height, copyfield.width,
cury, curx, 0, 0,
selh, selw
);
for (i = cury; i < cury+selh && i < field.height; i++)
memset(&field.buffer[curx + field.width*i], '.', MIN(selw, field.width-curx));
gbuffer_copy_subrect(
copyfield.buffer,
field.buffer,
copyfield.height, copyfield.width,
field.height, field.width,
0, 0, cury+y, curx+x,
selh, selw
);
}
static void
selmap(int (*f)(int))
{
int x, y;
for (y = cury; y < cury+selh && y < field.height; y++) {
for (x = curx; x < curx+selw && x < field.width; x++) {
field.buffer[x + field.width*y] = f(field.buffer[x + field.width*y]);
}
}
}
static void
screensize(int *w, int *h)
{
*w = (Dx(screen->r) - 2*Txtoff) / charw;
*h = ((Dy(screen->r) - 2*Txtoff) - 3*charh) / charh;
}
static void
select(void)
{
}
static void
kbdproc(void *k)
{
char buf[128], buf2[128], *s;
Channel *kchan;
int kfd, n;
Key key;
Rune r;
threadsetname("kbdproc");
if ((kfd = open("/dev/kbd", OREAD)) < 0)
sysfatal("can't open kbd: %r");
kchan = k;
buf2[0] = 0;
buf2[1] = 0;
buf[0] = 0;
for(;;){
if (buf[0] != 0) {
n = strlen(buf)+1;
memmove(buf, buf+n, sizeof(buf)-n);
}
if (buf[0] == 0) {
n = read(kfd, buf, sizeof(buf)-1);
if (n <= 0)
break;
buf[n-1] = 0;
buf[n] = 0;
}
switch (buf[0]) {
case 'c':
if (chartorune(&r, buf+1) > 0 && r != Runeerror)
nbsend(cchan, &r);
/* no break */
default:
continue;
case 'k':
s = buf+1;
while (*s){
s += chartorune(&r, s);
if (utfrune(buf2+1, r) == nil) {
key.down = 1;
key.rune = r;
nbsend(kchan, &key);
}
}
break;
case 'K':
s = buf2+1;
while (*s) {
s += chartorune(&r, s);
if(utfrune(buf+1, r) == nil) {
key.down = 0;
key.rune = r;
nbsend(kchan, &key);
}
}
break;
}
strcpy(buf2, buf);
}
}
void
threadmain(int argc, char **argv)
{
Mousectl *mctl;
Key key;
Keyboardctl kctl;
Mouse m;
char tmp[256];
Channel *kchan;
int oldw, oldh, w, h, n, shiftdown;
Alt a[Numchan+1] = {
[Cchar] = { nil, &key.rune, CHANRCV },
[Ckey] = { nil, &key, CHANRCV },
[Cmouse] = { nil, &m, CHANRCV },
[Cresize] = { nil, nil, CHANRCV },
[Credraw] = { nil, nil, CHANRCV },
{ nil, nil, CHANEND },
};
USED(argc, argv);
kchan = chancreate(sizeof(Key), 20);
cchan = chancreate(sizeof(Rune), 20);
proccreate(kbdproc, kchan, mainstacksize);
srand(time(0));
threadsetname("orca/draw");
if(initdraw(nil, nil, "orca") < 0)
sysfatal("initdraw: %r");
if ((mctl = initmouse(nil, screen)) == nil)
sysfatal("initmouse: %r");
kctl.c = cchan;
kctl.file = "/dev/null";
kctl.consfd = kctl.pid = kctl.ctlfd = -1;
a[Cchar].c = cchan;
a[Ckey].c = kchan;
a[Cmouse].c = mctl->c;
a[Cresize].c = mctl->resizec;
a[Credraw].c = chancreate(sizeof(ulong), 1);
curbg = allocimage(display, Rect(0, 0, 1, 1), RGBA32, 1, setalpha(DYellow, 128));
charw = stringwidth(font, "X");
charh = font->height;
screensize(&w, &h);
field_init_fill(&field, h, w, '.');
field_init(©field);
linebuf = malloc(sizeof(Rune)*MAX(w+1, 64));
memset(noteoff, 0, sizeof(noteoff));
mbuf_reusable_init(&mbuf);
mbuf_reusable_ensure_size(&mbuf, h, w);
oevent_list_init(&events);
proccreate(orcathread, a[Credraw].c, mainstacksize);
shiftdown = 0;
altdown = 0;
for (;;) {
redraw();
oldw = w = field.width;
oldh = h = field.height;
switch (alt(a)) {
case Cmouse:
switch (m.buttons & 7) {
case 1:
select();
break;
case 2:
break;
case 4:
n = menuhit(3, mctl, &menu3, nil);
if (n == 0 || n == 1) {
strncpy(tmp, filename, sizeof(tmp));
if (enter("file path:", tmp, sizeof(tmp), mctl, &kctl, nil) > 0) {
if (n == 0 && fieldload(tmp) == 0) {
w = field.width;
h = field.height;
strncpy(filename, tmp, sizeof(filename));
} else if (n == 1 && fieldsave(tmp) == 0) {
strncpy(filename, tmp, sizeof(filename));
}
}
}
break;
}
break;
case Cresize:
getwindow(display, Refnone);
break;
case Ckey:
switch (key.rune) {
case Kshift:
shiftdown = key.down;
break;
case Kalt:
altdown = key.down;
break;
}
break;
case Credraw:
break;
case Cchar:
switch (key.rune) {
case 0x0b: /* C-k */
case Kup:
if (shiftdown || mode == Mselect)
selh = MAX(1, selh-1);
else {
if (altdown || mode == Mslide)
selmove(0, -1);
cury = MAX(0, cury-1);
}
break;
case '\n': /* C-j */
case Kdown:
if (shiftdown || mode == Mselect)
selh++;
else {
if (altdown || mode == Mslide)
selmove(0, 1);
cury = MIN(h-1, cury+1);
}
break;
case Kbs: /* C-h */
case Kleft:
if (shiftdown || mode == Mselect)
selw = MAX(1, selw-1);
else {
if (altdown || mode == Mslide)
selmove(-1, 0);
curx = MAX(0, curx-1);
}
break;
case 0x0c: /* C-l */
if (shiftdown) { /* FIXME this conflicts with vim keys btw */
selmap(tolower);
break;
}
case Kright:
if (shiftdown || mode == Mselect)
selw++;
else {
if (altdown || mode == Mslide)
selmove(1, 0);
curx = MIN(w-1, curx+1);
}
break;
case Khome:
curx = 0;
break;
case Kend:
curx = field.width-1;
break;
case Kpgup:
cury = 0;
break;
case Kpgdown:
cury = field.height-1;
break;
case 0x11: /* C-q */
goto end;
case 0x12: /* C-r */
tick = 0;
break;
case 0x13: /* C-s */
tmp[0] = 0;
if (filename[0])
fieldsave(filename);
else if (enter("file path:", tmp, sizeof(tmp), mctl, &kctl, nil) > 0 && fieldsave(tmp) == 0)
strncpy(filename, tmp, sizeof(filename));
break;
case 0x18: /* C-x */
selcopy();
selset('.');
break;
case Ketx: /* C-c */
selcopy();
break;
case 0x16: /* C-v */
selpaste();
break;
case '(':
w = MAX(1, w-gridw);
break;
case ')':
w += gridw;
break;
case '_':
h = MAX(1, h-gridh);
break;
case '+':
h += gridh;
break;
case '>':
bpm++;
break;
case '<':
bpm = MAX(1, bpm-1);
break;
case Kins:
mode = mode != Mappend ? Mappend : Minsert;
break;
case Kesc:
if (mode == Mslide || mode != Minsert)
mode = Minsert;
else
selw = selh = 1;
break;
case '`':
case '~':
mode = mode != Mslide ? Mslide : Minsert;
break;
case '\'':
mode = mode != Mselect ? Mselect : Minsert;
break;
case Knack: /* C-u */
if (shiftdown)
selmap(toupper);
break;
case ' ':
if (mode == Minsert) {
pause = !pause;
break;
}
default:
if (key.rune == Kdel || key.rune == ' ')
key.rune = '.';
if (orca_is_valid_glyph(key.rune))
fieldset(key.rune);
else
fprint(2, "unhandled key %04x\n", key.rune);
break;
}
if (w != oldw || h != oldh) {
field_copy(&field, ©field);
field_resize_raw(&field, h, w);
memset(field.buffer, '.', w*h);
gbuffer_copy_subrect(
copyfield.buffer,
field.buffer,
copyfield.height, copyfield.width,
field.height, field.width,
0, 0, 0, 0,
MIN(field.height, copyfield.height), MIN(field.width, copyfield.width)
);
}
}
if (w != oldw || h != oldh) {
mbuf_reusable_ensure_size(&mbuf, h, w);
linebuf = realloc(linebuf, sizeof(Rune)*MAX(w+1, 64));
}
}
end:
mbuf_reusable_deinit(&mbuf);
oevent_list_deinit(&events);
field_deinit(&field);
field_deinit(©field);
threadexitsall(nil);
}