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trezor-firmware/core/src/trezor/pin.py

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from typing import TYPE_CHECKING
if TYPE_CHECKING:
from typing import Any
from trezor.ui.layouts.common import ProgressLayout
_previous_seconds: int | None = None
_previous_remaining: str | None = None
_progress_layout: ProgressLayout | None = None
_started_with_empty_loader = False
keepalive_callback: Any = None
_ignore_loader_messages: tuple[str, ...] = ()
def ignore_nonpin_loader_messages() -> None:
global _ignore_loader_messages
_ignore_loader_messages = ("Processing", "Starting up")
def allow_all_loader_messages() -> None:
global _ignore_loader_messages
_ignore_loader_messages = ()
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def render_empty_loader(message: str, description: str) -> None:
"""Render empty loader to prevent the screen appear to be frozen."""
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from trezor.ui.layouts.progress import pin_progress
global _progress_layout
global _started_with_empty_loader
_progress_layout = pin_progress(message, description)
_progress_layout.report(0, None)
_started_with_empty_loader = True
def show_pin_timeout(seconds: int, progress: int, message: str) -> bool:
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from trezor.ui.layouts.progress import pin_progress
# Possibility to ignore certain messages - not showing loader for them
if message in _ignore_loader_messages:
return False
global _previous_seconds
global _previous_remaining
global _progress_layout
global _started_with_empty_loader
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if callable(keepalive_callback):
keepalive_callback()
if progress == 0 or _progress_layout is None:
_previous_seconds = None
if seconds != _previous_seconds:
if seconds == 0:
remaining = "Done"
elif seconds == 1:
remaining = "1 second left"
else:
remaining = f"{seconds} seconds left"
_previous_remaining = remaining
_previous_seconds = seconds
else:
remaining = _previous_remaining
# create the layout if it doesn't exist yet or should be started again
if _progress_layout is None or (progress == 0 and not _started_with_empty_loader):
_progress_layout = pin_progress(message, description=remaining or "")
# reset the flag - the render_empty_loader() has the effect only in the first call
# of this function, where we do not want to re-initialize the layout
# to avoid a screen flicker
_started_with_empty_loader = False
# update the progress layout
_progress_layout.report(progress, remaining)
# drop the layout when done so trezor.ui doesn't have to remain in memory
if progress >= 1000:
_progress_layout = None
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return False