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Call cont_child() more liberally (#3996) 

Following the reproduction instructions from
https://github.com/i3/i3/issues/3242#issuecomment-436175346

For me, #3242 happened when the following sequence executed:
1. Fullscreening window correctly calls `stop_child()` in
6e24e2ad6f/i3bar/src/xcb.c (L685)
2. Xrandr change, `reconfig_windows()` is called and `output->visible` is
set to `true` in this line:
6e24e2ad6f/i3bar/src/xcb.c (L1791)
3. When the window's fullscreen is disabled,
`handle_visibility_notify()` returns in this line:
6e24e2ad6f/i3bar/src/xcb.c (L677)
because previously `output->visible` was set to `true`

To fix this, I call `cont_child()` more leniently since it is a no-op
when the child is not stopped.

Fixes #3242
Closes #3761
This commit is contained in:
Orestis Floros 2020-04-09 10:43:48 +02:00 committed by Michael Stapelberg
parent ae00468dca
commit 81671d454e
1 changed files with 1 additions and 7 deletions
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8
i3bar/src/xcb.c
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@ -677,9 +677,6 @@ static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
continue;
}
if (output->bar.id == event->window) {
if (output->visible == visible) {
return;
}
output->visible = visible;
}
num_visible += output->visible;
@ -687,10 +684,7 @@ static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
if (num_visible == 0) {
stop_child();
} else if (num_visible == visible) {
/* Wake the child only when transitioning from 0 to 1 visible bar.
* We cannot transition from 0 to 2 or more visible bars at once since
* visibility events are delivered to each window separately */
} else {
cont_child();
}
}