This introduces context to our strings to differentiate them when necessary.
The syntax chosen is `C_()`, following [glib](https://developer.gnome.org/glib/2.28/glib-I18N.html#C-:CAPS).
```lua
local _ = require("gettext")
local C_ = _.pgettext
C_("Menu|StyleTweaks|", "Pages")
```
Closes#5232.
References https://github.com/koreader/koreader/issues/5232
Given an entry in the PO file like the following:
```
msgctxt "systemstat"
msgid " Total"
msgstr "Totaal"
```
It can be addressed using:
```lua
local _ = require("gettext")
local C_ = _.pgettext
C_("systemstat", " Total")
```
This allows to distinguish between separate instances of the same string, for example "Pages" meaning "Number of pages" and "Pages" meaning "Display of pages".
Extraction of this code pattern is not yet implemented by nightswatcher. xgettext didn't yet support Lua back in 2013 when all this was first added to the program, but now it does. Therefore it might make the most sense to replace the current Python extraction script with xgettext itself.
By default it only understands gettext.pgettext(), but that can be addressed by passing some extra command line arguments, for example:
```
xgettext -l lua -c --keyword=C_:1c,2 *.lua
```
Bump crengine: background image and other fixes:
- View HTML: option to show text unicode codepoints
- Fix attribute parsing: decode &-encoded chars
- Text: allow wrap after more unicode spaces and hyphen
- Fix: no left hanging when hanging punctuation disabled
- lvtextfm.cpp: more comments, some formatting cleanup
- Optimize background image drawing
- CSS: fix background-image file path resolution
Bump luasec to 0.8.1
Bump harfbuzz to 2.6.0
cre.cpp:
Adds setBackgroundImage() proxy function to crengine
facility to set background textures (this is unrelated
to the background-image CSS fixes).
No frontend code (yet) to select such an image.
View HTML: adds a 3rd view (extended debug view), showing the
unicode codepoint of each char and crengine rendereing methods.
- show icons or letters as prefix of items
- various footer separators
- progress percentage format with decimal digits
- time in 12/24 format
- two duration formats (1:30, 1h30')
- move some options into Settings submenu
Although the current hard-coded paths work on debian, they may fail on many other distros. Other distros may pack koreader based on the released deb file. I personally have problem using current script on nixos, as it does not use the paths `/bin/bash` and `/usr/lib/`.
Patch similar to PR #3086.
Same problem #2638 when tap Subscribe to book share.
"Zsync" -> "Subscribe to book share" crashes koreader if not connected to wifi
After this fix when koreader is offline after "Zsync" -> "Subscribe to book share" we are asked to enable wifi.
Includes:
- Fix HR centering in enhanced rendering mode
- Fix black glyph in empty lines when floating punctuation enabled
- Fix highlights in obsolete erm_list_item nodes not shown
Includes https://github.com/koreader/crengine/pull/303:
- Force a re-render when :last-child & other pseudoclasses are met
- CSS: attribute selectors: don't check when there is no such attribute
- CSS: attribute selectors: fix parsing of case insensitive flag
