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261 lines (225 loc) · 8.34 KB
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# encoding: utf-8
from __future__ import absolute_import
import collections
import io
import logging
import sys
from optparse import Option
import curtsies
import curtsies.window
import curtsies.input
import curtsies.events
from .curtsiesfrontend.repl import BaseRepl
from .curtsiesfrontend.coderunner import SystemExitFromCodeRunner
from .curtsiesfrontend.interpreter import Interp
from . import args as bpargs
from . import translations
from .translations import _
from .importcompletion import find_iterator
from .curtsiesfrontend import events as bpythonevents
from . import inspection
from .repl import extract_exit_value
logger = logging.getLogger(__name__)
repl = None # global for `from bpython.curtsies import repl`
# WARNING Will be a problem if more than one repl is ever instantiated this way
class FullCurtsiesRepl(BaseRepl):
def __init__(self, config, locals_, banner, interp=None):
self.input_generator = curtsies.input.Input(
keynames="curtsies", sigint_event=True, paste_threshold=None
)
self.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 = self.input_generator.event_trigger(
bpythonevents.RefreshRequestEvent
)
self._schedule_refresh = self.input_generator.scheduled_event_trigger(
bpythonevents.ScheduledRefreshRequestEvent
)
self._request_reload = self.input_generator.threadsafe_event_trigger(
bpythonevents.ReloadEvent
)
self.interrupting_refresh = self.input_generator.threadsafe_event_trigger(
lambda: None
)
self.request_undo = self.input_generator.event_trigger(
bpythonevents.UndoEvent
)
with self.input_generator:
pass # temp hack to get .original_stty
super(FullCurtsiesRepl, self).__init__(
locals_=locals_,
config=config,
banner=banner,
interp=interp,
orig_tcattrs=self.input_generator.original_stty,
)
def get_term_hw(self):
return self.window.get_term_hw()
def get_cursor_vertical_diff(self):
return self.window.get_cursor_vertical_diff()
def get_top_usable_line(self):
return self.window.top_usable_row
def on_suspend(self):
self.window.__exit__(None, None, None)
self.input_generator.__exit__(None, None, None)
def after_suspend(self):
self.input_generator.__enter__()
self.window.__enter__()
self.interrupting_refresh()
def process_event_and_paint(self, e):
"""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=True, paste=None):
if interactive:
# Add custom help command
# TODO: add methods to run the code
self.initialize_interp()
# run startup file
self.process_event(bpythonevents.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)
for unused in find_iterator:
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=None, locals_=None, banner=None, welcome_message=None):
"""
banner is displayed directly after the version information.
welcome_message is passed on to Repl and displayed in the statusbar.
"""
translations.init()
config, options, exec_args = bpargs.parse(
args,
(
"curtsies options",
None,
[
Option(
"--log",
"-L",
action="count",
help=_("log debug messages to bpython.log"),
),
Option(
"--paste",
"-p",
action="store_true",
help=_("start by pasting lines of a file into session"),
),
],
),
)
if options.log is None:
options.log = 0
logging_levels = [logging.ERROR, logging.INFO, logging.DEBUG]
level = logging_levels[min(len(logging_levels) - 1, options.log)]
logging.getLogger("curtsies").setLevel(level)
logging.getLogger("bpython").setLevel(level)
if options.log:
handler = logging.FileHandler(filename="bpython.log")
logging.getLogger("curtsies").addHandler(handler)
logging.getLogger("curtsies").propagate = False
logging.getLogger("bpython").addHandler(handler)
logging.getLogger("bpython").propagate = False
interp = None
paste = None
if exec_args:
if not options:
raise ValueError("don't pass in exec_args without options")
exit_value = ()
if options.paste:
paste = curtsies.events.PasteEvent()
encoding = inspection.get_encoding_file(exec_args[0])
with io.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 sys.version_info[0] == 2:
# XXX these deprecation warnings need to go at some point
print(
_(
"WARNING: You are using `bpython` on Python 2. Support for Python 2 has been deprecated in version 0.19 and might disappear in a future version."
)
)
global repl
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
exit_value = repl.mainloop(True, paste)
except (SystemExitFromCodeRunner, SystemExit) as e:
exit_value = e.args
return extract_exit_value(exit_value)
def _combined_events(event_provider, paste_threshold):
"""Combines consecutive keypress events into paste events."""
timeout = yield "nonsense_event" # so send can be used immediately
queue = 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, paste_threshold=3):
g = _combined_events(event_provider, paste_threshold)
next(g)
return g
if __name__ == "__main__":
sys.exit(main())