Send a dedicated event that will let ReaderFooter check if we actually have anything relevant to display, and will do the usual "should I repaint/refresh" checks ;).
Fix#12323
Regression since #12002
When using Reference page numbers, "Pages left" was showing the
same info as "Current page", because Reference pages, being strings,
couldn't be used for arithmetics. But we can just count the number
of items left in the Reference pages array of strings.
Also fix edge case with "page progress" with hidden flow when
we are before the first chapter with a hidden flow before.
Fix: #10539, and for context #6489, #6733, #6534
Reorganize and reword most of the settings to make it clear what actually ties into auto sync, and what doesn't. (Specifically, what happens when a pull attempts to sync forward or backward has nothing to do with auto sync, it applies in all cases; while the periodic sync *does* require auto sync).
The main point of contention, though, is that auto sync will now *always* attempt to setup network connectivity (i.e., on resume/suspend/close). Periodic sync will *not* though (the intent being that, if you use periodic sync, you're relying on the activity check to actually keep wifi on at all times)).
Since this may lead to a large amount of nagging about wifi toggles on devices w/ NetworkManager support, it is now *disabled* by default on those devices. (And given that it wouldn't have worked because of the lack of connectivity, that doesn't really make any practical difference ;p).
Additionally, given the fact that there's no way to make this behavior viable if the "before wifi" action is left at its default of "prompt", this feature now *requires* that to be set to "turn_on" (on devices where it can, of course); attempting to toggle it on will warn about that if necessary.
This change is retroactive (OTM).
Includes an assortment of fixes and cleanups, including migrating to the new LuaSettings API, which is why there's no longer a smattering of superfluous flushes.
the footer can be toggled by gestures and menu, and should only be locked or skim in flipping mode when the footer is tapped
also allow toggling when only displaying the progress bar
rename to TapFooter to show it is not an event
Fixes: #10355
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
non-reflowable documents.
The code only handled setups with "reclaim bar height" enabled (because
that's my usual workflow, har har), but would have broken in various
more or less obvious ways without it, depending on the exact layout/zoom
settings.
The previous attempts at handling the no-reclaim case were focused
on scroll mode, which is a bit of a nightmare. This approach should
deal as well/badly as the previous one in scroll mode, but actually
handle page mode properly ;).
Re #9979
