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# To gradually migrate to mypy we aren't setting these globally yet
# mypy: disallow_untyped_defs=True
# mypy: disallow_untyped_calls=True
import argparse
import collections
import logging
import sys
import curtsies
import curtsies.events
import curtsies.input
import curtsies.window
from . import args as bpargs, translations, inspection
from .config import Config
from .curtsiesfrontend import events
from .curtsiesfrontend.coderunner import SystemExitFromCodeRunner
from .curtsiesfrontend.interpreter import Interp
from .curtsiesfrontend.repl import BaseRepl
from .repl import extract_exit_value
from .translations import _
from typing import (
Any,
Callable,
Dict,
Generator,
List,
Optional,
Sequence,
Tuple,
Union,
)
from ._typing_compat import Protocol
logger = logging.getLogger(__name__)
class SupportsEventGeneration(Protocol):
def send(
self, timeout: Optional[float]
) -> Union[str, curtsies.events.Event, None]:
...
def __iter__(self) -> "SupportsEventGeneration":
...
def __next__(self) -> Union[str, curtsies.events.Event, None]:
...
class FullCurtsiesRepl(BaseRepl):
def __init__(
self,
config: Config,
locals_: Optional[Dict[str, Any]] = None,
banner: Optional[str] = None,
interp: Optional[Interp] = None,
) -> None:
self.input_generator = curtsies.input.Input(
keynames="curtsies", sigint_event=True, paste_threshold=None
)
window = curtsies.window.CursorAwareWindow(
sys.stdout,
sys.stdin,
keep_last_line=True,
hide_cursor=False,
extra_bytes_callback=self.input_generator.unget_bytes,
)
self._request_refresh_callback: Callable[
[], None
] = self.input_generator.event_trigger(events.RefreshRequestEvent)
self._schedule_refresh_callback: Callable[
[float], None
] = self.input_generator.scheduled_event_trigger(
events.ScheduledRefreshRequestEvent
)
self._request_reload_callback = (
self.input_generator.threadsafe_event_trigger(events.ReloadEvent)
)
self._interrupting_refresh_callback = (
self.input_generator.threadsafe_event_trigger(lambda: None)
)
self._request_undo_callback = self.input_generator.event_trigger(
events.UndoEvent
)
with self.input_generator:
pass # temp hack to get .original_stty
super().__init__(
config,
window,
locals_=locals_,
banner=banner,
interp=interp,
orig_tcattrs=self.input_generator.original_stty,
)
def _request_refresh(self) -> None:
return self._request_refresh_callback()
def _schedule_refresh(self, when: float) -> None:
return self._schedule_refresh_callback(when)
def _request_reload(self, files_modified: Sequence[str]) -> None:
return self._request_reload_callback(files_modified)
def interrupting_refresh(self) -> None:
return self._interrupting_refresh_callback()
def request_undo(self, n: int = 1) -> None:
return self._request_undo_callback(n=n)
def get_term_hw(self) -> Tuple[int, int]:
return self.window.get_term_hw()
def get_cursor_vertical_diff(self) -> int:
return self.window.get_cursor_vertical_diff()
def get_top_usable_line(self) -> int:
return self.window.top_usable_row
def on_suspend(self) -> None:
self.window.__exit__(None, None, None)
self.input_generator.__exit__(None, None, None)
def after_suspend(self) -> None:
self.input_generator.__enter__()
self.window.__enter__()
self.interrupting_refresh()
def process_event_and_paint(
self, e: Union[str, curtsies.events.Event, None]
) -> None:
"""If None is passed in, just paint the screen"""
try:
if e is not None:
self.process_event(e)
except (SystemExitFromCodeRunner, SystemExit) as err:
array, cursor_pos = self.paint(
about_to_exit=True,
user_quit=isinstance(err, SystemExitFromCodeRunner),
)
scrolled = self.window.render_to_terminal(array, cursor_pos)
self.scroll_offset += scrolled
raise
else:
array, cursor_pos = self.paint()
scrolled = self.window.render_to_terminal(array, cursor_pos)
self.scroll_offset += scrolled
def mainloop(
self,
interactive: bool = True,
paste: Optional[curtsies.events.PasteEvent] = None,
) -> None:
if interactive:
# Add custom help command
# TODO: add methods to run the code
self.initialize_interp()
# run startup file
self.process_event(events.RunStartupFileEvent())
# handle paste
if paste:
self.process_event(paste)
# do a display before waiting for first event
self.process_event_and_paint(None)
inputs = combined_events(self.input_generator)
while self.module_gatherer.find_coroutine():
e = inputs.send(0)
if e is not None:
self.process_event_and_paint(e)
for e in inputs:
self.process_event_and_paint(e)
def main(
args: Optional[List[str]] = None,
locals_: Optional[Dict[str, Any]] = None,
banner: Optional[str] = None,
welcome_message: Optional[str] = None,
) -> Any:
"""
banner is displayed directly after the version information.
welcome_message is passed on to Repl and displayed in the statusbar.
"""
translations.init()
def curtsies_arguments(parser: argparse._ArgumentGroup) -> None:
parser.add_argument(
"--paste",
"-p",
action="store_true",
help=_("start by pasting lines of a file into session"),
)
config, options, exec_args = bpargs.parse(
args,
(
_("curtsies arguments"),
_("Additional arguments specific to the curtsies-based REPL."),
curtsies_arguments,
),
)
interp = None
paste = None
exit_value: Tuple[Any, ...] = ()
if exec_args:
if not options:
raise ValueError("don't pass in exec_args without options")
if options.paste:
paste = curtsies.events.PasteEvent()
encoding = inspection.get_encoding_file(exec_args[0])
with open(exec_args[0], encoding=encoding) as f:
sourcecode = f.read()
paste.events.extend(sourcecode)
else:
try:
interp = Interp(locals=locals_)
bpargs.exec_code(interp, exec_args)
except SystemExit as e:
exit_value = e.args
if not options.interactive:
return extract_exit_value(exit_value)
else:
# expected for interactive sessions (vanilla python does it)
sys.path.insert(0, "")
if not options.quiet:
print(bpargs.version_banner())
if banner is not None:
print(banner)
repl = FullCurtsiesRepl(config, locals_, welcome_message, interp)
try:
with repl.input_generator:
with repl.window as win:
with repl:
repl.height, repl.width = win.t.height, win.t.width
repl.mainloop(True, paste)
except (SystemExitFromCodeRunner, SystemExit) as e:
exit_value = e.args
return extract_exit_value(exit_value)
def _combined_events(
event_provider: "SupportsEventGeneration", paste_threshold: int
) -> Generator[Union[str, curtsies.events.Event, None], Optional[float], None]:
"""Combines consecutive keypress events into paste events."""
timeout = yield "nonsense_event" # so send can be used immediately
queue: collections.deque = collections.deque()
while True:
e = event_provider.send(timeout)
if isinstance(e, curtsies.events.Event):
timeout = yield e
continue
elif e is None:
timeout = yield None
continue
else:
queue.append(e)
e = event_provider.send(0)
while not (e is None or isinstance(e, curtsies.events.Event)):
queue.append(e)
e = event_provider.send(0)
if len(queue) >= paste_threshold:
paste = curtsies.events.PasteEvent()
paste.events.extend(queue)
queue.clear()
timeout = yield paste
else:
while len(queue):
timeout = yield queue.popleft()
def combined_events(
event_provider: SupportsEventGeneration, paste_threshold: int = 3
) -> SupportsEventGeneration:
g = _combined_events(event_provider, paste_threshold)
next(g)
return g
if __name__ == "__main__":
sys.exit(main())
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