The protocol says:
> The locked event "must not be sent until a new "locked" frame (either from a
> session lock surface or the compositor blanking the output) has been presented
> on all outputs and no security sensitive normal/unlocked content is possibly
> visible".
This helps users ensure the screen is properly locked before suspending
the machine. (e.g. with swaylock --ready-fd)
moves std::shared_ptrs to a new implementation
Advantages:
- you can dereference a weak_ptr directly. This will obviously segfault on a nullptr deref if it's expired.
- this is useful to avoid the .lock() hell where we are 100% sure the pointer _should_ be valid. (and if it isn't, it should throw.)
- weak_ptrs are still valid while the SP is being destroyed.
- reasoning: while an object (e.g. CWindow) is being destroyed, its `weak_ptr self` should be accessible (the sp is still alive, and so is CWindow), but it's not because by stl it's already expired (to prevent resurrection)
- this impl solves it differently. w_p is expired, but can still be dereferenced and used. Creating `s_p`s is not possible anymore, though.
- this is useful in destructors and callbacks.
* fix: refocus after destroy focused surface
* refactor: minor refactor on refocus loop condition
* refactor: minor refactor on condition
* style: format code
* lock: use uint64_t for iMonitorID
* lock: move activateLock to onNewSessionLock
* lock: add red screen fade
* lock: damage when fading the red screen and delay for screencopy
* lock: remove redundant scheduleFrameForMonitor
