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curtsies.py
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# encoding: utf-8
from __future__importabsolute_import
importcollections
importio
importlogging
importsys
fromoptparseimportOption
importcurtsies
importcurtsies.window
importcurtsies.input
importcurtsies.events
from .curtsiesfrontend.replimportBaseRepl
from .curtsiesfrontend.coderunnerimportSystemExitFromCodeRunner
from .curtsiesfrontend.interpreterimportInterp
from .importargsasbpargs
from .importtranslations
from .translationsimport_
from .importcompletionimportfind_iterator
from .curtsiesfrontendimporteventsasbpythonevents
from .importinspection
from .replimportextract_exit_value
from ._py3compatimportpy3
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
classFullCurtsiesRepl(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
)
withself.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,
)
defget_term_hw(self):
returnself.window.get_term_hw()
defget_cursor_vertical_diff(self):
returnself.window.get_cursor_vertical_diff()
defget_top_usable_line(self):
returnself.window.top_usable_row
defon_suspend(self):
self.window.__exit__(None,None,None)
self.input_generator.__exit__(None,None,None)
defafter_suspend(self):
self.input_generator.__enter__()
self.window.__enter__()
self.interrupting_refresh()
defprocess_event_and_paint(self,e):
"""If None is passed in, just paint the screen"""
try:
ifeisnotNone:
self.process_event(e)
except (SystemExitFromCodeRunner,SystemExit)aserr:
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
defmainloop(self,interactive=True,paste=None):
ifinteractive:
# Add custom help command
# TODO: add methods to run the code
self.initialize_interp()
# run startup file
self.process_event(bpythonevents.RunStartupFileEvent())
# handle paste
ifpaste:
self.process_event(paste)
# do a display before waiting for first event
self.process_event_and_paint(None)
inputs=combined_events(self.input_generator)
forunusedinfind_iterator:
e=inputs.send(0)
ifeisnotNone:
self.process_event_and_paint(e)
foreininputs:
self.process_event_and_paint(e)
defmain(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"),
),
],
),
)
ifoptions.logisNone:
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)
ifoptions.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
ifexec_args:
ifnotoptions:
raiseValueError("don't pass in exec_args without options")
exit_value= ()
ifoptions.paste:
paste=curtsies.events.PasteEvent()
encoding=inspection.get_encoding_file(exec_args[0])
withio.open(exec_args[0],encoding=encoding)asf:
sourcecode=f.read()
paste.events.extend(sourcecode)
else:
try:
interp=Interp(locals=locals_)
bpargs.exec_code(interp,exec_args)
exceptSystemExitase:
exit_value=e.args
ifnotoptions.interactive:
returnextract_exit_value(exit_value)
else:
# expected for interactive sessions (vanilla python does it)
sys.path.insert(0,"")
ifnotoptions.quiet:
print(bpargs.version_banner())
ifbannerisnotNone:
print(banner)
ifnotpy3:
# 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."
)
)
globalrepl
repl=FullCurtsiesRepl(config,locals_,welcome_message,interp)
try:
withrepl.input_generator:
withrepl.windowaswin:
withrepl:
repl.height,repl.width=win.t.height,win.t.width
exit_value=repl.mainloop(True,paste)
except (SystemExitFromCodeRunner,SystemExit)ase:
exit_value=e.args
returnextract_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()
whileTrue:
e=event_provider.send(timeout)
ifisinstance(e,curtsies.events.Event):
timeout=yielde
continue
elifeisNone:
timeout=yieldNone
continue
else:
queue.append(e)
e=event_provider.send(0)
whilenot (eisNoneorisinstance(e,curtsies.events.Event)):
queue.append(e)
e=event_provider.send(0)
iflen(queue)>=paste_threshold:
paste=curtsies.events.PasteEvent()
paste.events.extend(queue)
queue.clear()
timeout=yieldpaste
else:
whilelen(queue):
timeout=yieldqueue.popleft()
defcombined_events(event_provider,paste_threshold=3):
g=_combined_events(event_provider,paste_threshold)
next(g)
returng
if__name__=="__main__":
sys.exit(main())