Instead of firing on(Enter|Leave)Standby Events, and having every other piece of code that might care about that handle re-scheduling their stuff themselves; simply make the standby implementation (i.e., AutoSuspend's) shift the whole task queue by the amount of time spent in standby to re-sync everything automatically.
(This is necessary in the first place because Linux, as the task queue ticks in CLOCK_MONOTONIC, which does *not* tick during suspend/standby; while we expect most of the tasks scheduled to actually reflect real world clock delays).
Use both a whitelist for targeted widget repaints, a blacklist for no repaint at all, and a fallback for a full in-order ReaderUI repaint when unsure.
Use a similar approach in ReaderHeader (i.e., prevent explicit refreshes while ReaderMenu is open).
Re #9979, re #9768
Basically:
* Use `extend` for class definitions
* Use `new` for object instantiations
That includes some minor code cleanups along the way:
* Updated `Widget`'s docs to make the semantics clearer.
* Removed `should_restrict_JIT` (it's been dead code since https://github.com/koreader/android-luajit-launcher/pull/283)
* Minor refactoring of LuaSettings/LuaData/LuaDefaults/DocSettings to behave (mostly, they are instantiated via `open` instead of `new`) like everything else and handle inheritance properly (i.e., DocSettings is now a proper LuaSettings subclass).
* Default to `WidgetContainer` instead of `InputContainer` for stuff that doesn't actually setup key/gesture events.
* Ditto for explicit `*Listener` only classes, make sure they're based on `EventListener` instead of something uselessly fancier.
* Unless absolutely necessary, do not store references in class objects, ever; only values. Instead, always store references in instances, to avoid both sneaky inheritance issues, and sneaky GC pinning of stale references.
* ReaderUI: Fix one such issue with its `active_widgets` array, with critical implications, as it essentially pinned *all* of ReaderUI's modules, including their reference to the `Document` instance (i.e., that was a big-ass leak).
* Terminal: Make sure the shell is killed on plugin teardown.
* InputText: Fix Home/End/Del physical keys to behave sensibly.
* InputContainer/WidgetContainer: If necessary, compute self.dimen at paintTo time (previously, only InputContainers did, which might have had something to do with random widgets unconcerned about input using it as a baseclass instead of WidgetContainer...).
* OverlapGroup: Compute self.dimen at *init* time, because for some reason it needs to do that, but do it directly in OverlapGroup instead of going through a weird WidgetContainer method that it was the sole user of.
* ReaderCropping: Under no circumstances should a Document instance member (here, self.bbox) risk being `nil`ed!
* Kobo: Minor code cleanups.
This is a maintenance PR.
With scheduling the next autodim_check on every tap, we can keep the device longer in standby mode. So we have more power savings.
The long story: The current version works like that:
Let's say I set the idle-time to 3 min and I need 2.5 min to read a page.
Start at 0 min (next scheduled check is at/in 3 min)
Read and tap to turn page after 2.5 min (next scheduled check is at 3 min - in 0.5 min)
At 3 min there is a scheduled_check (wakeup) -> reschedule check in 3 min.
Read and tap to turn page after 2.5 min (no wakeup)
Then after 1 min there is a wakeup -> reschedule.
---> So I get an additional wakeup on every second page.
This PR solves the problem: During normal reading I don't get any wakeup during reading. (The only drawback is, that one function is unscheduled/scheduled on every tap, but that is no big deal).
