this PR adds a function that can be used to create any QR code, in a raw
form.
this can be used to create add-contact as well as add-second-device QR
codes (eg. `dc_create_qr_svg(dc_get_securejoin_qr())`) - as well as for
other QR codes as proxies.
the disadvantage of the rich-formatted QR codes as created by
`dc_get_securejoin_qr_svg()` and `dc_backup_provider_get_qr_svg()` were:
- they do not look good and cannot interact with UI layout wise (but
also tapping eg. an address is not easily possible)
- esp. text really looks bad. even with
[some](e5dc8fe3d8)
[hacks](https://github.com/deltachat/deltachat-android/pull/2215) it
[stays buggy](https://github.com/deltachat/deltachat-ios/issues/2200);
the bugs mainly come from different SVG implementation, all need their
own quirks
- accessibility is probably bad as well
we thought that time, SVG is a great thing for QR codes, but apart from
basic geometrics, it is not.
so, we avoid text, this also means to avoid putting an avatar in the
middle of the QR code (we can put some generic symbol there, eg.
different ones for add-contact and add-second-device).
while this looks like a degradation, also other messengers use more raw
QR codes. also, we removed many data from the QR code anyway, eg. the
email address is no longer there. that time, sharing QR images was more
a thing, meanwhile we have invite links, that are much better for that
purpose.
in theory, we could also leave the SVG path completely and go for PNG -
which we did not that time as PNG and text looks bad, as the system font
is not easily usable :) but going for PNG would add further challenges
as passing binary data around, and also UI-implemtation-wise, that would
be a larger step. so, let's stay with SVG in a form we know is
compatible.
the old QR code functions are deprecated.
New protocol streams .tar into iroh-net
stream without traversing all the files first.
Reception over old backup protocol
is still supported to allow
transferring backups from old devices
to new ones, but not vice versa.
* tagger.put_raw() has changes sematics and escapes strings on its own now
an explicit escaping leads to double escaping and to wrong display.
this should also improve lenght calculation,
as a quote and other specials counts as 1 character and not as 4-6.
* test encoding of generated qr-code-svg
* streamline function argument wording
use qrcode_description instead of raw_qrcode_description -
there is nothing "raw" in the argument,
it is a string as used throughout the app.
* repl: allow groupname arguments with more than one word (came over that when testing qr codes)
* calcualte text-size from the real number of lines
* shift text and watermark apart when text get longer
* make clippy happy
* generate qr code svg prototype
* qr code for groups
fix formatting
* - letter avatar in qrcode
- escape xml in userinput (display/groupname)
- fix "Me" display name
- merge import declarations
* remove dot at the end of VerifyContactQRDescription
* if addr == displayname, show only one of them
Especially useful for yggmail accounts without usernames,
because the text would overflow otherwise.
* use real clipPath for rounded avatar
* - center avatar text better (dominant-baseline)
- add "sans-serif" to font fallback for text if arial is missing
* make corner always blue
* add [logo + "get.delta.chat"] footer to qrcode
* Update deltachat-ffi/deltachat.h
Co-authored-by: bjoern <r10s@b44t.com>
* Apply suggestions from code review
Co-authored-by: bjoern <r10s@b44t.com>
* new card design
- add stockstrings
- update changelog
* make qrcode pixels also #f2f2f2 instead of full white
* rename VERIFY_CONTACT_QR_DESC to SETUP_CONTACT
make footer text a tiny bit darker upon r10s's request
* avoid using which is a doxygen command
* point out that one will join a group (this is still shorted and was also suggested in recent chats)
* add option to generate qr-code-svg to repl tool
* use same font-family in text and footer
* thinner card border
* remove superfluous <tspan> from footer to make color tweaking easier
* move font-weight to style, ios renderer does not pick it up from attribute; remove default font attributes not used consequently
* make get.delta.chat more visible
* align properly using dominant-baseline=central and alignment-baseline=middle, this makes things nice on all systems but android (before, ios was wrong and all others not 100% aligned as font metrics are ignored) (android needs a subsequent improvement)
Co-authored-by: bjoern <r10s@b44t.com>
