bpython-bpython/bpython/curtsies.py at main · sthagen/bpython-bpython · GitHub

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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,

Dict,

List,

Optional,

Protocol,

Tuple,

Union,

)

from collections.abc import Callable, Generator, Sequence

logger = logging.getLogger(__name__)

class SupportsEventGeneration(Protocol):

def send(

self, timeout: float | None

) -> str | curtsies.events.Event | None: ...

def __iter__(self) -> "SupportsEventGeneration": ...

def __next__(self) -> str | curtsies.events.Event | None: ...

class FullCurtsiesRepl(BaseRepl):

def __init__(

self,

config: Config,

locals_: dict[str, Any] | None = None,

banner: str | None = None,

interp: Interp | None = 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 = (

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=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: 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: curtsies.events.PasteEvent | None = 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: list[str] | None = None,

locals_: dict[str, Any] | None = None,

banner: str | None = None,

welcome_message: str | None = 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)

if welcome_message is None and not options.quiet and config.help_key:

welcome_message = (

_("Welcome to bpython!")

+ " "

+ _("Press <%s> for help.") % config.help_key

)

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[str | curtsies.events.Event | None, float | None, 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())

bpython-bpython/bpython/curtsies.py at main · sthagen/bpython-bpython · GitHub

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