* Support the Clara B&W, Clara Colour & Libra Colour
* Enable HW dithering on *all* the Kobo MTK devices
* Enforce 32bpp instead of 8bpp for Kobo devices with a color panel (the driver doesn't actually support 8bpp anyway)
* Enable standby support on MTK (whenever possible, i.e., not when plugged in, as that is horribly, horribly broken).
* Enforce the dedicated "color" waveform mode for image content in ScreenSaver, ImageViewer & Reader.
* Fix charging LED support on MTK
* Tweak the frontlight ramp on MTK + LM3630 so that it actually ramps smoothly
Search may highlight matches on the current page, and if there
are no others in the book, we would stay there and resume reading;
but we would get a spurious previous location (ie. in Book map)
that we would not expect keeping, and we may accidently go back
to previous location, losing our reading position.
Avoid this by only adding current page to location stack when
actually leaving the current page.
Because of complications with other reading modes, this is
currently only enabled for CRE document when in page mode.
When on a page before the first ToC item (the first chapter),
that first chapter title may be shown in the footer instead
of a more correct blank title.
This bug might still have had other small effect elsewhere.
Device:getDefaultRoute parses /proc/net/route and converts the hex
addresses to textual IP addresses, but in `isOnline` we don't care what
address the gateway actually has, we only care about whether we have a
default route into the Internet.
This provides a simpler alternative that does the equivalent of
"ip route get 203.0.113.1 || ip route get 2001:db8::1" (note that it
does support IPv6-only connectivity as opposed to
Device:getDefaultRoute) and returns true if we have a route.
Inspired by https://github.com/pavel-odintsov/get_default_outgoing_ip_linux
Doing the `isOnline` check (`socket.dns.toip("dns.msftncsi.com")`)
without having internet connectivity (`!isConnected`) results in the
`isOnline` check never succeeding again even if connectivity is later
acquired. This is most likely caused by /etc/resolv.conf only being
parsed once - https://sourceware.org/bugzilla/show_bug.cgi?id=984, an
issue that was fixed in glibc 2.26 (PocketBook firmware U740.6.8.2461
has glibc 2.23).
This fix works around the problem by checking if we have a default route
first before even attempting to check `isOnline`. If we don't, then
`isOnline` is (almost) guaranteed to fail anyway.
We could alternatively check `isConnected` instead, but that only checks
wireless connectivity on many platforms, and we could have internet
access via USBNet instead. Checking for the default route via any
interface should work reliably for both wireless and USBNet
connectivity.
Another alternative fix is to add a fallback nameserver to
/etc/resolv.conf like we do for the Kobo platform [1]. Unfortunately,
this fix would not work in the following (rather common) scenario:
1. PocketBook boots, connects to WiFi
2. KOReader starts, /etc/resolv.conf looks all right, no fallback needed
3. PocketBook goes to sleep, disconnects from WiFi, clears resolv.conf
4. PocketBook wakes up, stays disconnected
5. KOReader user does a Wikipedia lookup, networking freezes
[1]: https://github.com/koreader/koreader/pull/6424/files#diff-be863601c59a2d6607af6b04b3be2392ec4494df6d25dae48250fae57b737f61R216-R224
Fixes: https://github.com/koreader/koreader/issues/10183
Related: https://github.com/koreader/koreader/issues/6421
Added in <https://github.com/koreader/koreader/pull/8722> and unproblematic for the past two years, but Weblate has now decided to complain about it to the extent of disabling translations:
> Error message
String contains control character: 'If some book titles, dictionary entries and such are not displayed well but shown as \ufffe\ufffe or ��, it may be necessary to download the required fonts for those languages. They can then be enabled as additional UI fallback fonts.\nFonts for many languages can be downloaded at:\n\nhttps://fonts.google.com/noto\n\nOnly fonts named "Noto Sans xyz" or "Noto Sans xyz UI" (regular, not bold nor italic, not Serif) will be available in this menu. However, bold fonts will be used if their corresponding regular fonts exist.'
