from __future__ import absolute_import
import code
import logging
import sys
import time
from subprocess import Popen, PIPE
from optparse import Option
from itertools import izip
from functools import wraps
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.translations import _
from bpython.importcompletion import find_iterator
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):
config, options, exec_args = bpargs.parse(args, (
'scroll options', None, [
Option('--log', '-L', action='store_true',
help=_("log debug messages to bpython.log")),
Option('--type', '-t', action='store_true',
help=_("enter lines of file as though interactively typed")),
]))
if options.log:
handler = logging.FileHandler(filename='bpython.log')
logging.getLogger('curtsies').setLevel(logging.DEBUG)
logging.getLogger('curtsies').addHandler(handler)
logging.getLogger('curtsies').propagate = False
logging.getLogger('bpython').setLevel(logging.DEBUG)
logging.getLogger('bpython').addHandler(handler)
logging.getLogger('bpython').propagate = False
else:
logging.getLogger('bpython').setLevel(logging.WARNING)
interp = None
paste = None
if exec_args:
if not options:
raise ValueError("don't pass in exec_args without options")
exit_value = 0
if options.type:
paste = curtsies.events.PasteEvent()
sourcecode = open(exec_args[0]).read()
paste.events.extend(sourcecode)
else:
try:
interp = code.InteractiveInterpreter(locals=locals_)
bpargs.exec_code(interp, exec_args)
except SystemExit, e:
exit_value = e.args
if not options.interactive:
raise SystemExit(exit_value)
else:
sys.path.insert(0, '') # expected for interactive sessions (vanilla python does it)
mainloop(config, locals_, banner, interp, paste, interactive=(not exec_args))
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:
reload_requests = []
def request_reload(desc):
reload_requests.append(curtsies.events.ReloadEvent([desc]))
refresh_requests = []
def request_refresh(when='now'):
refresh_requests.append(curtsies.events.RefreshRequestEvent(when=when))
def event_or_refresh(timeout=None):
if timeout is None:
timeout = .2
else:
timeout = min(.2, timeout)
starttime = time.time()
while True:
t = time.time()
refresh_requests.sort(key=lambda r: 0 if r.when == 'now' else r.when)
if refresh_requests and (refresh_requests[0].when == 'now' or refresh_requests[-1].when < t):
yield refresh_requests.pop(0)
elif reload_requests:
e = reload_requests.pop()
yield e
else:
e = input_generator.send(timeout)
if starttime + timeout < time.time() or e is not None:
yield e
global repl # global for easy introspection `from bpython.curtsies import repl`
with Repl(config=config,
locals_=locals_,
request_refresh=request_refresh,
request_reload=request_reload,
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) 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 paste:
process_event(paste)
process_event(None) #priming the pump (do a display before waiting for first event)
for _, e in izip(find_iterator, event_or_refresh(0)):
if e is not None:
process_event(e)
for e in event_or_refresh():
process_event(e)
if __name__ == '__main__':
sys.exit(main())