apps.webauthn.boot() does not need an if-condition because it's only
called from session.py when the usb interface is enabled
This means that they do not need to be stored in RAM at all. The obvious
drawback is that we need to hand-edit the if/elif sequence, but we don't
register new handlers all that often so 🤷
Layouts can be used by the application code to interact with user using
small number of dialogs or other groups of UI components. Each layout is
identified by name and takes some parameters. Most layouts will have an
implementation for each hardware model, mechanism is provided to import
the correct version so that application code can be oblivious to the
model.
This commit introduces the layout concept and converts a couple of
dialogs to use it.
They now live under trezor.ui.components.tt. Later
trezor.ui.components.t1 will be added and application code will be
rewritten to not use them directly in order to work on both TT and T1.
This avoids problems with large timeouts causing the scheduler queue to
think the time counter has overflown, and ordering the autolock task before
immediate tasks.
The maximum reasonable time difference is 0x20000000, which in
microseconds is ~8 minutes, but in milliseconds a more reasonable ~6
days.
this makes sense, really: close_others() requests UI exclusivity, and
that is something that generally happens at the same places we emit a
ButtonRequest
this prevents a certain class of UI test failure. It also localizes the
use of debuglink signals into the layout classes instead of call sites,
which is a design we were already using for confirm_signals
this involves some changes to the workflow defaults:
* workflow.start_default() takes no arguments
* workflow.set_default() (originally replace_default) configures the
default that will be started by next call to start_default().
The intended usecase is to set_default() first and then start it
separately.
* apps.base.set_homescreen() factors out the logic originally in
main.py, that decides which homescreen should be launched. This uses
set_default() call. start_default() is then used explicitly in main.py
