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LemonBoy / bar

A featherweight, lemon-scented, bar based on xcb
MIT License
1.62k stars 194 forks source link

Give bar control over input generating command. #181

Closed jmoggr closed 8 years ago

jmoggr commented 8 years ago

When the bar is getting input from a loop with a pause, there can be a noticable delay to visually updating the bar on click events. By letting bar call an input command it can now update instantly on a click event and still have a delay so it's not an idle hog.

Something like: while true; do date; sleep 10; done | bar -d

Now becomes: bar -d -c "date" -t 10

Either option may be ommited and the bar will still perform as before. If a command (-c) is given but not a timeout (-t) then the timeout defaults to 5 seconds.

I don't know how much of an issue this is, but i had to change the compiler standard from c99 to gnu99 to use popen()/pclose(). This still works with both clang and gcc.

jmoggr commented 8 years ago

I've discovered a serious issue with this. If bar daemonizes it spams the command in popen. I'm not sure why, it behaves as expected while running in the foreground.