This replaces the mechanism by which the IoPauseGuard makes sure the
IO scheduler is resumed: it really is a drop guard now by sending a
single message on drop.
This makes it not have to hold on to anything like the context so
makes it a lot easier to use.
The trade-off is that a long-running task is spawned when the guard is
created, this task needs to receive the message from the drop guard in
order for the scheduler to resume.
This changes the JSON-RPC APIs to get a QR code from the backup
provider to block. It means once you have a (blocking) call to
provide_backup() you can call get_backup_qr() or get_backup_qr_svg()
and they will block until the QR code is available.
Calling get_backup_qr() or get_backup_qr_svg() when there is no backup
provider will immediately error.
This makes the BackupProvider automatically invoke pause-io while it
is needed.
It needed to make the guard independent from the Context lifetime to
make this work. Which is a bit sad.
To handle backups the UIs have to make sure they do stop the IO
scheduler and also don't accidentally restart it while working on it.
Since they have to call start_io from a bunch of locations this can be
a bit difficult to manage.
This introduces a mechanism for the core to pause IO for some time,
which is used by the imex function. It interacts well with other
calls to dc_start_io() and dc_stop_io() making sure that when resumed
the scheduler will be running or not as the latest calls to them.
This was a little more invasive then hoped due to the scheduler. The
additional abstraction of the scheduler on the context seems a nice
improvement though.
async-smtp does not implement read buffering anymore
and expects library user to implement it.
To implement read buffer, we wrap streams into BufStream
instead of BufWriter.
The fact that `PRAGMA incremental_vacuum` may return a zero-column
SQLITE_ROW result is documented in `sqlite3_data_count()` documentation:
<https://www.sqlite.org/c3ref/data_count.html>
Previously successful auto_vacuum worked,
but resulted in a "Failed to run incremental vacuum" log.
With existing approach of constructing
the SQL query dynamically I get errors like this:
ephemeral.rs:575: update failed: too many SQL variables: Error code 1: SQL error or missing database
In my case it is trying to delete 143658 messages.
This is the result of importing a Desktop backup
and enabling device auto-deletion on the phone.
Current SQLite limit is 32766 variables
as stated in <https://www.sqlite.org/limits.html>.
This way we can test some recently added config options that we don't want to expose in UI like
DeleteToTrash or SignUnencrypted. Note that persistent config options like DeleteToTrash should
remain anyway because they allow fine-grained (per-account) control. Having them matters for tests
also.
`<meta name="color-scheme" content="light dark" />` is a hint to the browsers
that the page can be rendered in light as well as in dark mode
and that the browser can apply corresponding defaults.
as we do not add css colors on our own,
this is sufficient for letting generated html messasge being rendered
in dark mode.
cmp. https://drafts.csswg.org/css-color-adjust/#color-scheme-propcloses#4146
standard footers meanwhile go the "contact status",
so they are no longer a reason to trigger "full message view".
this was already discussed when the HTML view was introduced at #2125
however, forgotten to change when the "contact status" was added at #2218
this pr will result in a cleaner chat view
with less "Show Full Message..." buttons
and will also save some storage
(in fact, i came over that when reviewing #4129 )
We are currently using libsqlite3-sys 0.25.2,
corresponding to SQLcipher 4.5.2
and SQLite 3.39.2.
SQLite supports ALTER TABLE DROP COLUMN since version 3.35.0,
and it has received critical database corruption bugfixes in 3.35.5.
There have been no fixes to it between SQLite 3.36.0 and 3.41.0,
so it appears stable now.
Explicit `prepare_msg` corresponding to `dc_prepare_msg`
is intended only for the case where the message is prepared
before the file is ready. It is not indented for calling
right before send_msg and requires that file path in the blobdir.
With explicit `prepare_msg` removed
all the tests still pass but there is no requirement
that the file is put into blobdir beforehand.
