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mirror of https://github.com/ihabunek/toot synced 2024-12-24 08:00:39 +01:00
Toot-Mastodon-CLI-TUI-clien.../toot/tui/app.py
2019-09-03 15:40:46 +02:00

401 lines
13 KiB
Python

import json
import logging
import traceback
import urwid
from concurrent.futures import ThreadPoolExecutor
from toot import api, __version__
from .compose import StatusComposer
from .constants import PALETTE
from .entities import Status
from .timeline import Timeline
logger = logging.getLogger(__name__)
class Header(urwid.WidgetWrap):
def __init__(self, app, user):
self.app = app
self.user = user
self.text = urwid.Text("")
self.cols = urwid.Columns([
("pack", urwid.Text(('header_bold', 'toot'))),
("pack", urwid.Text(('header', f' | {user.username}@{app.instance}'))),
("pack", self.text),
])
widget = urwid.AttrMap(self.cols, 'header')
widget = urwid.Padding(widget)
self._wrapped_widget = widget
def clear_text(self, text):
self.text.set_text("")
def set_text(self, text):
self.text.set_text(" | " + text)
class Footer(urwid.Pile):
def __init__(self):
self.status = urwid.Text("")
self.message = urwid.Text("")
return super().__init__([
urwid.AttrMap(self.status, "footer_status"),
urwid.AttrMap(self.message, "footer_message"),
])
def set_status(self, text):
self.status.set_text(text)
def clear_status(self, text):
self.status.set_text("")
def set_message(self, text):
self.message.set_text(text)
def set_error_message(self, text):
self.message.set_text(("footer_message_error", text))
def clear_message(self):
self.message.set_text("")
class TUI(urwid.Frame):
"""Main TUI frame."""
@classmethod
def create(cls, app, user):
"""Factory method, sets up TUI and an event loop."""
tui = cls(app, user)
loop = urwid.MainLoop(
tui,
palette=PALETTE,
event_loop=urwid.AsyncioEventLoop(),
unhandled_input=tui.unhandled_input,
)
tui.loop = loop
return tui
def __init__(self, app, user):
self.app = app
self.user = user
self.loop = None # set in `create`
self.executor = ThreadPoolExecutor(max_workers=1)
self.timeline_generator = api.home_timeline_generator(app, user, limit=40)
# self.timeline_generator = api.public_timeline_generator(app.instance, local=False, limit=40)
# Show intro screen while toots are being loaded
self.body = self.build_intro()
self.header = Header(app, user)
self.footer = Footer()
self.footer.set_status("Loading...")
self.timeline = None
self.overlay = None
self.exception = None
super().__init__(self.body, header=self.header, footer=self.footer)
def run(self):
self.loop.set_alarm_in(0, lambda *args: self.async_load_statuses(is_initial=True))
self.loop.run()
self.executor.shutdown(wait=False)
def build_intro(self):
font = urwid.font.Thin6x6Font()
# NB: Padding with width="clip" will convert the fixed BigText widget
# to a flow widget so it can be used in a Pile.
big_text = "Toot {}".format(__version__)
big_text = urwid.BigText(("intro_bigtext", big_text), font)
big_text = urwid.Padding(big_text, align="center", width="clip")
intro = urwid.Pile([
big_text,
urwid.Divider(),
urwid.Text([
"Maintained by ",
("intro_smalltext", "@ihabunek"),
" and contributors"
], align="center"),
urwid.Divider(),
urwid.Text(("intro_smalltext", "Loading toots..."), align="center"),
])
return urwid.Filler(intro)
def run_in_thread(self, fn, args=[], kwargs={}, done_callback=None, error_callback=None):
"""Runs `fn(*args, **kwargs)` asynchronously in a separate thread.
On completion calls `done_callback` if `fn` exited cleanly, or
`error_callback` if an exception was caught. Callback methods are
invoked in the main thread, not the thread in which `fn` is executed.
"""
def _default_error_callback(ex):
self.exception = ex
self.footer.set_error_message("An exeption occured, press E to view")
_error_callback = error_callback or _default_error_callback
def _done(future):
try:
result = future.result()
if done_callback:
# Use alarm to invoke callback in main thread
self.loop.set_alarm_in(0, lambda *args: done_callback(result))
except Exception as ex:
exception = ex
logger.exception(exception)
self.loop.set_alarm_in(0, lambda *args: _error_callback(exception))
future = self.executor.submit(fn, *args, **kwargs)
future.add_done_callback(_done)
def connect_default_timeline_signals(self, timeline):
def _compose(*args):
self.show_compose()
def _reply(timeline, status):
logger.info("reply")
self.show_compose(status)
def _source(timeline, status):
self.show_status_source(status)
urwid.connect_signal(timeline, "focus", self.refresh_footer)
urwid.connect_signal(timeline, "reblog", self.async_toggle_reblog)
urwid.connect_signal(timeline, "favourite", self.async_toggle_favourite)
urwid.connect_signal(timeline, "source", _source)
urwid.connect_signal(timeline, "compose", _compose)
urwid.connect_signal(timeline, "reply", _reply)
def build_timeline(self, statuses):
def _close(*args):
raise urwid.ExitMainLoop()
def _next(*args):
self.async_load_statuses(is_initial=False)
def _thread(timeline, status):
self.show_thread(status)
timeline = Timeline("home", statuses)
self.connect_default_timeline_signals(timeline)
urwid.connect_signal(timeline, "next", _next)
urwid.connect_signal(timeline, "close", _close)
urwid.connect_signal(timeline, "thread", _thread)
return timeline
def show_thread(self, status):
def _close(*args):
"""When thread is closed, go back to the main timeline."""
self.body = self.timeline
self.body.refresh_status_details()
self.refresh_footer(self.timeline)
# This is pretty fast, so it's probably ok to block while context is
# loaded, can be made async later if needed
context = api.context(self.app, self.user, status.id)
ancestors = [Status(s, self.app.instance) for s in context["ancestors"]]
descendants = [Status(s, self.app.instance) for s in context["descendants"]]
statuses = ancestors + [status] + descendants
focus = len(ancestors)
timeline = Timeline("thread", statuses, focus, is_thread=True)
self.connect_default_timeline_signals(timeline)
urwid.connect_signal(timeline, "close", _close)
self.body = timeline
self.refresh_footer(timeline)
def async_load_statuses(self, is_initial):
"""Asynchronously load a list of statuses."""
def _load_statuses():
self.footer.set_message("Loading statuses...")
try:
data = next(self.timeline_generator)
except StopIteration:
return []
finally:
self.footer.clear_message()
return [Status(s, self.app.instance) for s in data]
def _done_initial(statuses):
"""Process initial batch of statuses, construct a Timeline."""
self.timeline = self.build_timeline(statuses)
self.timeline.refresh_status_details() # Draw first status
self.refresh_footer(self.timeline)
self.body = self.timeline
def _done_next(statuses):
"""Process sequential batch of statuses, adds statuses to the
existing timeline."""
self.timeline.append_statuses(statuses)
self.run_in_thread(_load_statuses,
done_callback=_done_initial if is_initial else _done_next)
def refresh_footer(self, timeline):
"""Show status details in footer."""
status, index, count = timeline.get_focused_status_with_counts()
self.footer.set_status([
("footer_status_bold", "[{}] ".format(timeline.name)),
status.id, " - status ", str(index + 1), " of ", str(count),
])
def show_status_source(self, status):
self.open_overlay(
widget=StatusSource(status),
title="Status source",
)
def show_exception(self, exception):
self.open_overlay(
widget=ExceptionStackTrace(exception),
title="Unhandled Exception",
)
def show_compose(self, in_reply_to=None):
def _close(*args):
self.close_overlay()
def _post(timeline, *args):
self.post_status(*args)
composer = StatusComposer(in_reply_to)
urwid.connect_signal(composer, "close", _close)
urwid.connect_signal(composer, "post", _post)
self.open_overlay(composer, title="Compose status")
def post_status(self, content, warning, visibility, in_reply_to_id):
data = api.post_status(self.app, self.user, content,
spoiler_text=warning,
visibility=visibility,
in_reply_to_id=in_reply_to_id)
status = Status(data, self.app.instance)
# TODO: instead of this, fetch new items from the timeline?
self.timeline.prepend_status(status)
self.timeline.focus_status(status)
self.footer.set_message("Status posted {} \\o/".format(status.id))
self.close_overlay()
def async_toggle_favourite(self, timeline, status):
def _favourite():
logger.info("Favouriting {}".format(status))
api.favourite(self.app, self.user, status.id)
def _unfavourite():
logger.info("Unfavouriting {}".format(status))
api.unfavourite(self.app, self.user, status.id)
def _done(loop):
# Create a new Status with flipped favourited flag
new_data = status.data
new_data["favourited"] = not status.favourited
timeline.update_status(Status(new_data, status.instance))
self.run_in_thread(
_unfavourite if status.favourited else _favourite,
done_callback=_done
)
def async_toggle_reblog(self, timeline, status):
def _reblog():
logger.info("Reblogging {}".format(status))
api.reblog(self.app, self.user, status.id)
def _unreblog():
logger.info("Unreblogging {}".format(status))
api.unreblog(self.app, self.user, status.id)
def _done(loop):
# Create a new Status with flipped reblogged flag
new_data = status.data
new_data["reblogged"] = not status.reblogged
timeline.update_status(Status(new_data, status.instance))
self.run_in_thread(
_unreblog if status.reblogged else _reblog,
done_callback=_done
)
# --- Overlay handling -----------------------------------------------------
default_overlay_options = dict(
align="center", width=("relative", 80),
valign="middle", height=("relative", 80),
)
def open_overlay(self, widget, options={}, title=""):
top_widget = urwid.LineBox(widget, title=title)
bottom_widget = self.body
_options = self.default_overlay_options
_options.update(options)
self.overlay = urwid.Overlay(
top_widget,
bottom_widget,
**_options
)
self.body = self.overlay
def close_overlay(self):
self.body = self.overlay.bottom_w
self.overlay = None
# --- Keys -----------------------------------------------------------------
def unhandled_input(self, key):
# TODO: this should not be in unhandled input
if key in ('e', 'E'):
if self.exception:
self.show_exception(self.exception)
elif key == 'esc':
if self.overlay:
self.close_overlay()
elif key in ('q', 'Q'):
if self.overlay:
self.close_overlay()
else:
raise urwid.ExitMainLoop()
class StatusSource(urwid.ListBox):
"""Shows status data, as returned by the server, as formatted JSON."""
def __init__(self, status):
source = json.dumps(status.data, indent=4)
lines = source.splitlines()
walker = urwid.SimpleFocusListWalker([
urwid.Text(line) for line in lines
])
super().__init__(walker)
class ExceptionStackTrace(urwid.ListBox):
"""Shows an exception stack trace."""
def __init__(self, ex):
lines = traceback.format_exception(etype=type(ex), value=ex, tb=ex.__traceback__) * 3
walker = urwid.SimpleFocusListWalker([
urwid.Text(line) for line in lines
])
super().__init__(walker)