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Fix polling issue.

This commit is contained in:
LemonBoy 2012-07-17 11:34:12 +02:00
parent a7dbc379bf
commit 4701b3521c
1 changed files with 38 additions and 19 deletions
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57
bar.c
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@ -22,6 +22,13 @@ static xcb_drawable_t canvas;
#define MIN(a,b) ((a > b ? b : a))
void
fillrect (int color, int x, int y, int width, int height)
{
xcb_change_gc (c, gc, XCB_GC_FOREGROUND, (const uint32_t []){ pal[color] });
xcb_poly_fill_rectangle (c, canvas, gc, 1, (const xcb_rectangle_t []){ { x, y, width, height } });
}
int
draw (int x, int align, int fgcol, int bgcol, char *text)
{
@ -43,8 +50,7 @@ draw (int x, int align, int fgcol, int bgcol, char *text)
break;
}
/* Draw the background first */
xcb_change_gc (c, gc, XCB_GC_FOREGROUND, (const uint32_t []){ pal[bgcol] });
xcb_poly_fill_rectangle (c, canvas, gc, 1, (const xcb_rectangle_t []){ {pos_x, 0, strw, BAR_HEIGHT} });
fillrect (bgcol, pos_x, 0, strw, BAR_HEIGHT);
/* Setup the colors */
xcb_change_gc (c, gc, XCB_GC_FOREGROUND, (const uint32_t []){ pal[fgcol] });
xcb_change_gc (c, gc, XCB_GC_BACKGROUND, (const uint32_t []){ pal[bgcol] });
@ -71,8 +77,7 @@ parse (char *text)
int fgcol = 1;
int bgcol = 0;
xcb_change_gc (c, gc, XCB_GC_FOREGROUND, (const uint32_t []){ pal[0] });
xcb_poly_fill_rectangle (c, canvas, gc, 1, (const xcb_rectangle_t []){ {0, 0, bw, BAR_HEIGHT} });
fillrect (0, 0, 0, bw, BAR_HEIGHT);
for (;;) {
if (*p == 0x0 || *p == 0xA || (*p == '\\' && p++ && *p != '\\' && strchr ("fblcr", *p))) {
pos_x += draw (pos_x, align, fgcol, bgcol, parsed_text);
@ -158,15 +163,23 @@ init (void)
int
main (int argc, char **argv)
{
struct pollfd pollin = { .fd = STDIN_FILENO, .events = POLLIN };
static char input[1024] = {0, };
xcb_expose_event_t *e;
int permanent = 0;
char ch;
xcb_generic_event_t *ev;
xcb_expose_event_t *expose_ev;
int permanent = 0;
int hup = 0;
char ch;
while ((ch = getopt (argc, argv, "ph")) != -1) {
switch (ch) {
case 'h':
printf ("usage: %s [-p | -h]\n\t-h Shows this help\n\t-p Don't close after the data ends\n", argv[0]); exit (0);
printf ("usage: %s [-p | -h]\n"
"\t-h Shows this help\n"
"\t-p Don't close after the data ends\n", argv[0]);
exit (0);
case 'p': permanent = 1; break;
}
}
@ -176,26 +189,32 @@ main (int argc, char **argv)
signal (SIGTERM, sighandle);
init ();
xcb_change_gc (c, gc, XCB_GC_FOREGROUND, (const uint32_t []){ pal[0] });
xcb_poly_fill_rectangle (c, canvas, gc, 1, (const xcb_rectangle_t []){ {0, 0, bw, BAR_HEIGHT} });
struct pollfd pollin = { .fd = STDIN_FILENO, .events = POLLIN | POLLHUP};
fillrect (0, 0, 0, bw, BAR_HEIGHT);
for (;;) {
if (poll (&pollin, 1, -1) > 0) { /* Read from stdin */
if (pollin.revents & POLLHUP) break; /* No more data */
if (!hup && poll (&pollin, 1, 1001) > 0) {
if (pollin.revents & POLLHUP) hup = 1;
fgets (input, sizeof(input), stdin);
parse (input);
xcb_copy_area (c, canvas, win, gc, 0, 0, 0, 0, bw, BAR_HEIGHT);
}
if ((e = (xcb_expose_event_t *)xcb_poll_for_event (c))) { /* Handle the xcb expose event */
if (e && (e->response_type & ~0x80) == XCB_EXPOSE) {
xcb_copy_area (c, canvas, win, gc, e->x, e->y, e->x, e->y, e->width, e->height);
free (e);
if ((ev = xcb_poll_for_event (c))) {
expose_ev = (xcb_expose_event_t *)ev;
switch (ev->response_type) {
case XCB_EXPOSE: xcb_copy_area (c, canvas, win, gc, expose_ev->x, expose_ev->y,
expose_ev->x, expose_ev->y, expose_ev->width, expose_ev->height); break;
}
free (ev);
}
xcb_flush (c);
if (hup) {
if (!permanent) break; /* No more data, bail out */
else sleep (1); /* Idle loop, yield to avoid cpu hogging */
}
}
/* There's no more data, but the user still wants to see it */
while (permanent) sleep (1);
return 0;
}