Move classic file browser settings from CoverBrowser plugin
into FileManagerMenu, so they are available when this
plugin is disabled (as they also apply to everything
based on Menu).
Namely, the Terminal plug-in and its chain of InputDialog on top of each other (via the "Save" button, which opens a whole new fs InputDialog to set the filename, while keeping the file's fs InputDialog open).
- Menu widget: allow specifying the number of items per
page and the item font size, so we can use other values
than the default File browser ones
- Menu: fix setDirty when a border is used
- ToC: add item per page and font size settings, make
Alternative ToC more visible (was previously
available on long-press on Table of contents)
- Bookmarks: add item per page, font size, size reduction
- Progress bars (Skim widget and footer): allow selecting
ToC depths from which ticks are made.
as it is used for the "Set as default" popup.
This allows having that text accurate on widgets without an
actual name_text (e.g., the font size wheel).
Fix#7231
Co-authored-by: Frans de Jonge <fransdejonge@gmail.com>
* DictQuickLookup: Preserve alpha when switching dict, and scrolling
inside a dict.
* Start moving the NumberPicker alpha hack to Button itself
This makes handling flash_ui easier and saner, avoiding flickering.
* Handle the transparency hack entirely from within Button
* Murder the now unnecessary NumberPicker update_callback hack
* Tweak comments
* And the Button handling made that redundant, too
* Squish debug print
* More comment tweaks
* Reset transparency on scrolling instead of rpeserving it
* Reset alpha when switching dictionaries
* Simplify the pre/post callbakc transparency state handling
And explain why we need to care.
* Give a named reference to ButtonDialog's MovableContainer, so the Button
alpha hack behaves with it
* Document the "self.movable" convention
* Amend that comment a bit
e.g., we don't care much about MultiConfirmBox'w MpvableContainer, as
any button action will close it.
* And make SkimTo's MovableContainer accessible so that Button can grok
that it's translucent
* Switching between HTML/text dicts (Fix#7209)
* Updating the scrollbar and scroll state properly when switching dicts
* Highlights in SortWidget
* Highlights in the Dictionary Download page
* Minor simplification of the tail end of the update process in ImageViewer
Rework Dual pages code so that the view is considered
a single page number, so it looks more like 2-columns
on a single page.
This solves a few issues like:
- Page number and count are consistent between top
and bottom status bars
- SkimTo -1/+1 doing nothing every other tap
- Statistics being wrong (like "Pages read" never
going over half of the book page count)
* QuickDictLookup, ImageViewer, NumberPicker: Smarter `update` that will re-use most of the widget's layout instead of re-instantiating all the things.
* SpinWidget/DoubleSpinWidget: The NumberPicker change above renders a hack to preserve alpha on these widgets almost unnecessary. Also fixed said hack to also apply to the center, value button.
* Button: Don't re-instantiate the frame in setText/setIcon when unnecessary (e.g., no change at all, or no layout change).
* Button: Add a refresh method that repaints and refreshes a *specific* Button (provided it's been painted once) all on its lonesome.
* ConfigDialog: Free everything that's going to be re-instatiated on update
* A few more post #7118 fixes:
* SkimTo: Always flag the chapter nav buttons as vsync
* Button: Fix the highlight on rounded buttons when vsync is enabled (e.g., it's now entirely visible, instead of showing a weird inverted corner glitch).
* Some more heuristic tweaks in Menu/TouchMenu/Button/IconButton
* ButtonTable: fix the annoying rounding issue I'd noticed in #7054 ;).
* Enable dithering in TextBoxWidget (e.g., in the Wikipedia full view). This involved moving the HW dithering align fixup to base, where it always ought to have been ;).
* Switch a few widgets that were using "partial" on close to "ui", or, more rarely, "flashui". The intent being to limit "partial" purely to the Reader, because it has a latency cost when mixed with other refreshes, which happens often enough in UI ;).
* Minor documentation tweaks around UIManager's `setDirty` to reflect that change.
* ReaderFooter: Force a footer repaint on resume if it is visible (otherwise, just update it).
* ReaderBookmark: In the same vein, don't repaint an invisible footer on bookmark count changes.
* I'd failed to notice that ButtonTable *also* instantiates seven billion Buttons on each update. Unfortunately, that one is way trickier to fix properly, so, work around its behavior in Button. (This fixes multiple issues with stuff using ButtonTable, which is basically anything with a persistent set of buttons. A good and easy test-case is the dictionary popup, e.g., the Highlight button changes text, and the next/prev dic buttons change state. All that, and more, was broken ;p).
* Handle corner-cases related to VirtualKeyboard (e.g., Terminal & Text Editor), which screwed with both TouchMenu & Button heuristics because it's weird.
* Flag a the dictionary switch buttons as vsync
(They trigger a partial repaint of the dictionary content).
* Flag the ReaderSearch buttons as vsync
They very obviously trigger a partial repaint, much like SkimTo ;p.
If we're in range of multiple known WiFi Access Points (including multiple instances of the same SSID), we don't need to keep trying to connect after the first successful connection.
Minimal change would have been replacing the return inside the foreach function with return [a non-nil value].
But foreach is deprecated, and since I was touching the code anyhow, I figured I'd do that tiny update as well.
* Fix typo in dropbox
Reported by @lescheck
* Rephrase text justification explanation more elegantly
* CoverBrowser: fix up some plurals
* Statistics: remove random use of template function
* Use ngettext for minute/minutes and second/seconds
* Change KB/MB/GB to kB/MB/GB SI units
Hide bottom panel when showing a SpinWidget, so we gain
on the bottom the space covered by the SpinWidget to see
more how a change is affecting the book text.
For clarity, rename delay_repaint & refresh_callback
to hide_on_apply & when_applied_callback.
Normalize SpinWidgets: have them both accept a
cancel_callback and a close_callback.
InfoMessage: call dissmiss_callback also on timeout.
Rework eb66856d so that "Sync T/B Margins" is disabled
when set Top and Bottom margins differ (previously,
the bottom one was taking over the top one when
it was enabled).
Make Notification have toast=true, and UIManager deal
specifically with such widget:
a "toast" widget gets closed by any event, and let
the event be handled by a lower widget.
This should allow us to not wait or tap to get rid
of a notification, and just go on with what we're
doing.
Also make them have a default timeout of 2s,
used with all existing ones.
* Wherever possible, do an actual dumb invert on the Screen BB instead of repainting the widget, *then* inverting it (which is what the "invert" flag does).
* Instead of playing with nextTick/tickAfterNext delays, explicitly fence stuff with forceRePaint
* And, in the few cases where said Mk. 7 quirk kicks in, make the fences more marked by using a well-placed WAIT_FOR_UPDATE_COMPLETE
* Fix an issue in Button where show/hide & enable/disable where actually all toggles, which meant that duplicate calls or timing issues would do the wrong thing. (This broke dimming some icons, and mistakenly dropped the background from FM chevrons, for example).
* Speaking of, fix Button's hide/show to actually restore the background properly (there was a stupid typo in the variable name)
* Still in Button, fix the insanity of the double repaint on rounded buttons. Turns out it made sense, after all (and was related to said missing background, and bad interaction with invert & text with no background).
* KeyValuePage suffered from a similar issue with broken highlights (all black) because of missing backgrounds.
* In ConfigDialog, only instanciate IconButtons once (because every tab switch causes a full instantiation; and the initial display implies a full instanciation and an initial tab switch). Otherwise, both instances linger, and catch taps, and as such, double highlights.
* ConfigDialog: Restore the "don't repaint ReaderUI" when switching between similarly sized tabs (re #6131). I never could reproduce that on eInk, and I can't now on the emulator, so I'm assuming @poire-z fixed it during the swap to SVG icons.
* KeyValuePage: Only instanciate Buttons once (again, this is a widget that goes through a full init every page). Again, caused highlight/dimming issues because buttons were stacked.
* Menu: Ditto.
* TouchMenu: Now home of the gnarliest unhilight heuristics, because of the sheer amount of different things that can happen (and/or thanks to stuff not flagged covers_fullscreen properly ;p).
* Bump base
https://github.com/koreader/koreader-base/pull/1280https://github.com/koreader/koreader-base/pull/1282https://github.com/koreader/koreader-base/pull/1283https://github.com/koreader/koreader-base/pull/1284
* Bump android-luajit-launcher
https://github.com/koreader/android-luajit-launcher/pull/284https://github.com/koreader/android-luajit-launcher/pull/285https://github.com/koreader/android-luajit-launcher/pull/286https://github.com/koreader/android-luajit-launcher/pull/287
Rework b66d0be3 and 6205f260 by making that simpler
to comprehend:
- If interruption or search result window is shown in
less than 3 secondes: no specific tweak, a tap outside
will dismiss everything instantaneously.
- If done after 3 seconds: show the interruption or result
window, and discard input for a few 100ms.
- UIManager:discardEvents(): increase a bit default delays.
Restore feature removed in c98dfef7: tap on title
to set dict of current result as a preferred dictionary
for this document.
Changes from former implementation:
- trust sdcv for ordering, instead of doing it ourselves
by looking at the results (which didn't always work)
- allow setting multiple preferred dicts
- order of preference is shown with a number as a prefix
to the dictionary name in the title
- taping again allows removing it from preferred dicts,
and taping again allows setting it back as the first
preferred dict
* Don't try to expand a screensaver message without any special tokens
* Don't needlessly nil the background when show_message is true
Honor the actual nil background setting, now that we've got one.
Also, only clear covers_fullscreen with no background *and* no widget.
* Support special tokens outside of ReaderUI. Because the undocumented
"Oops, I'll use the fallback otherwise" was extremely not
user-friendly.
If you're *extremely* unlucky, the scheduled check might run *right*
after a wakeup, before the network interface is up. So, you have a
previously stored packet count, but the new one is nil. Boom.
By having the same DoubleSpinWidget launched when
hitting "..." on any of Top margin or Bottom margin
progress bars.
DoubleSpinWidget: remove blank space when no info_text.
Add UIManager:discardEvents(), to allow dropping events
for a period of time.
Default duration of 600ms on eInk, 300ms otherwise.
Used when showing the dict result window, so that a tap
happening just when it's being shown won't discard it.
Used with Trapper:confirm()/:info(), to avoid taps made
in a previous processing to dismiss (and so, select the
cancel action) a ConfirmBox not yet painted/visible.
Don't cleanup input text as much when entered manually
(or when it's sane) than when coming from book text
selection.
This may allow looking up words like "-suffix", or
do more precise Wikipedia queries.
- Rework widget layout to avoid implicit (and wrong)
sizing, using proper padding/margins and correct
measurements of components.
- Adjust lookup word font size so it's not smaller
than the definition.
- Tweak small window positionning: keep it centered
if possible, only move it to keep the highlighted
word shown when we can.
- Large window: adjust to screen size correctly,
leaving room for footer.
- Always have a "Close" button at bottom right.
Former always displayed button "Follow link" will
be added as a 3rd row in the rare case we select
a word in a link.
- Replace "tap on lookup word to edit and redo the
query" with an icon on the right: tap on it to
edit the queries word, long-press to edit the
current result word. Only close the current dict
window when lookup is launched.
- Remove feature "tap on title to set current dict
as the default dict for this document", as it didn't
really work, and it was bad UX.
- InfoMessage: add an option show_delay.
- MovableContainer: avoid possible crash when
not yet painted.
- ReaderDictionary: use show_delay=0.5 instead of
scheduleIn(0.5n...) (a5b133da) as we need the
InfoWidget to be known to UIManager to catch tap
and allow interrupting lookups properly.
- ReaderDictionary: rework handling of no_refresh_on_close
(6162c287) with proper regions comparisons
* Modernize jit syntax
It's built-in, no need for a require anymore.
* Flag Android should_restrict_JIT again
It's mildly helpful at putting off the inevitable.
(very, very, very, very mildly).
* Bump android-luajit-launcher
https://github.com/koreader/android-luajit-launcher/pull/281
* Don't paint invisible background-colored rounded corners
Made obvious when testing #7042
* Only enforce a highlight radius on buttons that don't already set a
custom one ;).
(Mostly, square buttons with a 0 radius ^^).
ffi/blitbuffer already handles radius being nil, which suits us just fine
:)
* Implement proper alpha-blending of SVG icons
Also, instead of doing that every time, cache a pre-composited version
that matches the screen's BB type.
This is faster, and also has the advantage of making icon highlights
behave.
Jot down a few notes about corner-cases or future improvements, e.g.,
dimming icons on non-white backgrounds, and nightmode with color icons.
- Add IconWidget, use it for icons instead of ImageWidget.
Specify icons by name only, look for them (with either
.svg or .png suffixes) in multiple directories (including
koreader/settings/icons/ to allow customizing them).
Don't crash when icon name not found, shown a black
background warning icon instead.
- Don't trust the icons' native sizes: replace
scale_for_dpi=true with width/height=DGENERIC_ICON_SIZE,
so all icons get the same (tunable) size - except in
a few specific use cases.
- Top and bottom menu bars: normalize, and have icons
properly centered in them, extend vertical line
separators up to the edges.
- TOC: adjust expand/collapse icons size to items size
* stride is now a size_t
On some platforms, that's 64 bits, which means it's no longer
automatically converted to a Lua number to avoid precision loss.
Do that ourselves, because lua-serialize doesn't know how to handle an
uint64_t cdata ;).
* Make switching *back* to the default DPI via auto actually work
properly.
eg., by actually setting DPI back to defaults, and clearing the override
flag.
* Bump base to pickup https://github.com/koreader/koreader-base/pull/1258
* ReaderFooter:
* Honor the global twelve_hour_clock setting, instead of
duplicating a local one.
(Re #6969)
* os.date is a thin wrapper around strftime, so we might be able to get
away with some not-quite-standard extensions...
These are *definitely* supported on Linux, but are *NOT* the glibc
extension (that'd be e.g., %-I), so, hopefully, they're somewhat
portable...
They are also supported on BSD/macOS.
They are *not* supported by the MS UCRT. That means MinGW-w64, too.
This *appears* to be supported on current Bionic (it might even support
said glibc format altering extensions).
* And of course, Windows is terrible, so, make this terribly ugly to not
break it there...
* Turns out BSD also supports the dash trim format extension, so, leave
the trimming to the libc, and handle the special-casing in a way that
doesn't create stupid locals.
* Random unrelated cleanup ^^.
(https://gitter.im/koreader/koreader?at=5fd24be492aa1c4ef5d11f31)
* Update the testsuite
(Because the default used to be 24h clock).
Changed the default to 24h clock ;p.
* Explain why we don't try to fix it in Lua
Avoid crash with RTL UI after options we moved.
Swap Zoom direction items when RTL UI.
Also don't check show_func when sizing the names
on the bottom menu, to avoid icons moving or
resizing when toggling options.
* ReaderDictionary: Don't refresh when dimissing the lookup info
InfoMessage
Re #6932
* Fix dict_largewindow in Landscape
Have to leave some room for the UI chrome
* Top menu & bottom menu tapzones are now full-width, thanks to the now sane override system.
* A separate, extra tapzone was also created for each of them to provide a taller, but narrower tapzone extension (one that doesn't clash with the prev/next tapzones).
* The footer tapzone was made much taller.
Change the text in the button from a hypen (-) to a
Unicode minus size (−, U+2212). This is the same width
as the + sign.
The NaturalLightWidget and FrontLightWidget controls
already use minus signs in this way.
- Move zoom options from top menu to bottom config
- Add option to manually define zoom (relative to
page width) and overlap (in percent)
- Add options to zoom to columns or rows, possibly
with overlap. Add panning direction options when
page forward in these modes
By essentially dropping the whole XHTML block, instead of trying to salvage each and every tag one by one as we did before.
Also, as that's usually the result after broken parsing, handle nil URLs slightly better in the frontend, so that they get caught/reported properly instead of doing nothing and/or crashing half the time.
Add option to hide (skip) non-linear fragments, only working
in 1-page mode. Tweaks mostly to footer, toc and skim code
to make it clear(er) which pages belong to linear or non-linear
fragments.
* Don't attempt to restart Nickel when asking for a reboot/shutdown
Use a magic exit code to ID those cases.
* Limit this to Kobo, to avoid breaking potentially existing assumptions
with other platform's startup scripts
- Lcd devices won't use the SurfaceView, just the good old native content/window (except AndroidTv and ChromeOS)
- All android dialogs will be presented with Material Design on recent devices.
- Added an option to device settings to manage application battery optimization.
- Permissions that require the user to go to a settings page will be presented with a native android dialog.
- bump android-luajit-launcher
- Changes under the hood: koreader/android-luajit-launcher#257
2 new widgets:
- QRWidget, that's like an ImageWidget, but with a text property that will be converted to a QR code ;
- QRMessage, that's like an InfoMessage, but shows the message as QR code.
Moreover, it adds the ability to export QR codes to the text editor.
1 new plugin:
- Generate QR codes from clipboard
Changes to text editor plugin:
- Add the ability to export QR codes.
Have ReaderBack be the sole handler of onBack.
Add 4 mutually exclusive options for the Back key,
to avoid ReaderLink and ReaderBack location stacks
from interfering (ReaderBack's stack being always a
superset of ReaderLink's stack).
So, remove "Enable back history", which is replaced
by Back option "Go to previous read page".
Fix a few possible crashes and inconsistencies (when
zoom, scroll or reflow have changed) with ReaderPaging
and ReaderView when restoring previous page/view.
Follow up to b90f6db8: allow specifying an other
value for tap interval when the keyboard is shown
(a good value for tap interval on reader and UI
elements might be too long on the keyboard, and
prevent typing fast).
* When closing a widget, stop sending setDirty call for widgets lower on
the stack as soon as we hit a full-screen one.
This prevents inflated refresh regions when closing stuff on top of a
stack of multiple covers_fullscreen widgets (i.e., InfoMessages on top
of the Favorites page on top of the FM, for instance).
And, while we're there, also prevent getting infected by dithered
widgets when they're below a non dithered full-screen widget (the exact
same examples works, if the underlying FM page requires dithering).
On pocketbook, update modes are not as clear cut due to overall
chipset and kernel version mess. Inkview solves this by always
using the slowest (and safe) GC16 waveform. We now do that too
by default.
Slow updates suck though, so there's now a menu entry to configure
it for speed (with mild artifacts at best, kernel panic at worst).
This is a generic interface (any eink Screen can announce support).
The driver may interpret the slow/fast range however they want.
This allows for better energy efficiency (no more 50Hz tick poll),
as well as lower input lag / higher precision - touch events are
native linux ones.
In addition, auto off/suspend plugin is used in this mode, as we need
to trigger (timed) sleep / poweroff on our own, since the OS ones
will no longer work whenever koreader has focus.
This is for rooted devices only, and possibly somewhat FW
specific, so enabled only on PB740-2 where it's reasonably tested.
* Update the data collection format & handler to make it much less tortuous
* Update the pagecount & resync the stats on document layout changes
* Update the database schema to allow doing most queries against a SQL view that rescales the collected data to be accurate regardless of document layout (thanks to @marek-g for the SQL magic ;)).
* Add a "reset stats for current book" entry in the list of reset options, one that won't horribly break stats in said book ;).
* Fixed a couple of resource (SQL connection) leaks (in ReaderStatistics:getCurrentBookStats & ReaderStatistics:getCurrentBookStats).
* Flush stats to the DB on periodical metadata saves.
* Minor cosmetic tweaks to the code
* Enable AutoSuspend plugin on rM
Fix#6769
Re: #6028
* Use the PowerEvent handler on rM
It makes much more sense than the fire & forget & hope for the best
approach copied from the Kindle platform, because we *are* controlling
suspend ourselves (mostly), unlike on Kindle ;).
Fix#6676
* Enable HW inversion on the rM
I mean, we kinda forgot to ever test that, but I don't really see why it
wouldn't work ;).
Previously items weren't actually moved, but swapped with the item
at their new position. That works well if you move an item for one position.
However, if you move an item over several positions, you won't get the
expected behaivor.
And to make it the screensaver image.
Done on two-finger large diagonal tap on multitouch
devices (like regular ScreenShoter) as long-diagonal
swipe is reserved for panning.
Fallback to tap in the bottom left corner on
non-multitouch devices.
As things were, when I activated USBMS, any bookmarks recently added and not yet stored in the sidecar file would be lost after returning to the reader. These changes fix that.
This pull requests aims to provide convenient way to zoom in comics. The idea is when user holds/double taps (not decided yet) on a manga/comic panel, it gets cut out from the rest of the image and zoomed. More details in koreader/koreader-base#1148. Depends on koreader/koreader-base#1159
* Uses bunch of new plumbing in base to configure screen rotations in hardware (koreader normally does this via blit buffer rotations, except for android).
* Some PB specific kludges that used to pollute core/framebuffer_linux are brought into PBs frontend driver.
Includes:
- Update German hyphenation patterns
- (Upstream) Adds ODT (ODF) format support
- TextLang, hyphenation: add Basque, Croatian, Esperanto,
Estonian, Georgian, Latvian, Lithuanian, Macedonian,
Occitan, Welsh; update Bulgarian, Irish, Portuguese,
Slovak, Dutch, Norwegian, Spanish; update hyphen min
for Czech, English, Greek; fix Romanian and Ukrainian
pattern file names
- HyphMan: adds HyphMethod::getLeft/RightHyphenMin()
- epub.css: update HR default style
- fb2.css: keep <date> in main text left-aligned
- getRenderedWidths(): inline-block and table fixes
- CSS: avoid style hash mismatch when serializing content:''
- Tables: re-order row groups when necessary
- XML parsing: don't drop trailing text
- HTML parser: tweak implicit head/body insertion code
- Fix text search failure when blank at start or end
readertypography.lua: some cleanup by removing the first
table listing hyph dicts, and including their filenames
in the second table so we can build the first table
dynamically. Also fetch hyph left/right min limits from
crengine to not have to duplicate them here and keep them
in sync.
css_tweaks.lua: for in-page footnotes, switched from
"-cr-only-if: epub-document" to ": -fb2-document"
("not" FB2 documents), so these tweaks also work with
DocX and ODT footnotes.
Also included in base bump:
- KOPTContext: add comic panel detection function/additional
leptonica declarations
- Forcibly disable docs when building giflib
In the "Set footnote popup font size", allow toggling
between setting a relative (to the document) font size
and setting an absolute font size (that won't change
with the document font size).
Since 8815cbe0 and getSafeFilename() taking additional
parameters, and :gsub() returning multiple values,
filesystem type wasn't really checked and replacements
were not ensured, so saving articles like "Portal:Stuff"
failed on VFAT devices as ':' wasn't replaced.
After the awesome work made by @ezdiy:
- Remove empty dir from release zip
- Remove misc files (txt, md, html, gif) to prevent displaying them in PB library
- Do not asociate executable files (sh and py for the moment), just openable files
- Rename the font sample from html to template (to prevent wiping it during clean)
* Only ask to start an USBMS session when plugged into a USB host on Kobo
Also, fix a typo that broke plugout detection on cervantes
* Bump base (necessary input/KoboUSBMS changes)
https://github.com/koreader/koreader-base/pull/1183
Only with CreDocuments (as no way currently to highlight links
in PDFs).
Tab or Shift-Tab to select next or previous links.
Press to follow (or show footnote in popup, and in there Press
to follow), back to go back.
Adaptively pins the auto-standby UI lock. When frequent input
from user is observed, we'll prevent for increasingly longer
periods of time, and revert back to more aggressive standby
with infrequent input (infrequent taps when reading a book).
A BackgroundRunner plugin instance will stop running
(rescheduling a check every 2 seconds) when there is no
(or no more) job to run.
Clients of this service now have to emit an event after
adding a job into PluginShare.backgroundJobs, so an
already loaded but stopped BackgroundRunner can notice
it and start running again.
* Be even more defensive around KoboUSBMS handling in the startup script
And add some more logging. To the log before a session, to the syslog
after, because we can't be sure onboard is viable.
* Display a short version string straight in the Version label
* Move system statistics inside the Help menu
* Move Version inside Help
* Bump base
https://github.com/koreader/koreader-base/pull/1173
* Enable i18n in KoboUSBMS
* Rejig the "No confirmation" USBMS setting:
In now *only* affects the USB plug in event.
The menu entry will never show the popup (clicking on it should already
be confirmation enough, that, yes, we really would like to do that,
please ;)).
Also, enable said plug in behavior on Cervantes, too ;).
* Add an option to disable USBMS entirely
* Bump base
https://github.com/koreader/koreader-base/pull/1170
* Add an option to *always* flash on chapter boundaries
* Optionally, in flash on chapter boundaries mode, also flash on the *second* page of a chapter.
(There's often a large river at the top of the page on a chapter's first page)
* In CRe, request a flashing update when there is significant image content on the page.
* Register all refresh rate related options in Dispatcher, making them available in Gestures & Profiles.
Includes:
- (Upstream) LVBase64NodeStream: fix possible segfault
- (Upstream) Fix getting encoding from HTML META tags
- FB2: also look for cover in <src-title-info>
- FB2: fix cover image colors
- FB2: don't draw cover in scroll mode
- TextLang: better linebreaks at em-dash (EN/ES/FR)
- TextLang: increase _lb_props static array size
FB2 footnotes style tweaks: avoid gap above first footnote,
caused by the title bottom margin collapsing into it.
