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Copy pathcurtsies.py
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186 lines (159 loc) · 7.15 KB
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from __future__ import absolute_import
import code
import io
import logging
import sys
from optparse import Option
import curtsies
import curtsies.window
import curtsies.input
import curtsies.events
from bpython.curtsiesfrontend.repl import Repl
from bpython.curtsiesfrontend.coderunner import SystemExitFromCodeGreenlet
from bpython import args as bpargs
from bpython import translations
from bpython.translations import _
from bpython.importcompletion import find_iterator
from bpython.curtsiesfrontend import events as bpythonevents
from bpython import inspection
from bpython.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
def main(args=None, locals_=None, banner=None):
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 = code.InteractiveInterpreter(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, '')
print(bpargs.version_banner())
try:
exit_value = mainloop(config, locals_, banner, interp, paste,
interactive=(not exec_args))
except (SystemExitFromCodeGreenlet, SystemExit) as e:
exit_value = e.args
return extract_exit_value(exit_value)
def mainloop(config, locals_, banner, interp=None, paste=None,
interactive=True):
with curtsies.input.Input(keynames='curtsies', sigint_event=True) as \
input_generator:
with curtsies.window.CursorAwareWindow(
sys.stdout,
sys.stdin,
keep_last_line=True,
hide_cursor=False,
extra_bytes_callback=input_generator.unget_bytes) as window:
request_refresh = input_generator.event_trigger(
bpythonevents.RefreshRequestEvent)
schedule_refresh = input_generator.scheduled_event_trigger(
bpythonevents.ScheduledRefreshRequestEvent)
request_reload = input_generator.threadsafe_event_trigger(
bpythonevents.ReloadEvent)
interrupting_refresh = input_generator.threadsafe_event_trigger(
lambda: None)
request_undo = input_generator.event_trigger(
bpythonevents.UndoEvent)
def on_suspend():
window.__exit__(None, None, None)
input_generator.__exit__(None, None, None)
def after_suspend():
input_generator.__enter__()
window.__enter__()
interrupting_refresh()
# global for easy introspection `from bpython.curtsies import repl`
global repl
with Repl(config=config,
locals_=locals_,
request_refresh=request_refresh,
schedule_refresh=schedule_refresh,
request_reload=request_reload,
request_undo=request_undo,
get_term_hw=window.get_term_hw,
get_cursor_vertical_diff=window.get_cursor_vertical_diff,
banner=banner,
interp=interp,
interactive=interactive,
orig_tcattrs=input_generator.original_stty,
on_suspend=on_suspend,
after_suspend=after_suspend) as repl:
repl.height, repl.width = window.t.height, window.t.width
def process_event(e):
"""If None is passed in, just paint the screen"""
try:
if e is not None:
repl.process_event(e)
except (SystemExitFromCodeGreenlet, SystemExit) as err:
array, cursor_pos = repl.paint(
about_to_exit=True,
user_quit=isinstance(err,
SystemExitFromCodeGreenlet))
scrolled = window.render_to_terminal(array, cursor_pos)
repl.scroll_offset += scrolled
raise
else:
array, cursor_pos = repl.paint()
scrolled = window.render_to_terminal(array, cursor_pos)
repl.scroll_offset += scrolled
if interactive:
# Add custom help command
# TODO: add methods to run the code
repl.coderunner.interp.locals['_repl'] = repl
repl.coderunner.interp.runsource(
'from bpython.curtsiesfrontend._internal '
'import _Helper')
repl.coderunner.interp.runsource('help = _Helper(_repl)\n')
del repl.coderunner.interp.locals['_repl']
del repl.coderunner.interp.locals['_Helper']
# run startup file
process_event(bpythonevents.RunStartupFileEvent())
# handle paste
if paste:
process_event(paste)
# do a display before waiting for first event
process_event(None)
for unused in find_iterator:
e = input_generator.send(0)
if e is not None:
process_event(e)
for e in input_generator:
process_event(e)
if __name__ == '__main__':
sys.exit(main())