# Copyright (c) 2014, Paul Ivanov <[email protected]>

# Distributed under the terms of the Modified BSD License.

# The full license is in the LICENSE file distributed with this software.

"""bipython: the boldly indiscriminate Python interpreter

http://bipython.org

"""

from __future__ import absolute_import, with_statement, division

from __future__ import print_function

__author__ = 'Paul Ivanov <[email protected]>'

__copyright__ = 'Copyright (c) 2014 Paul Ivanov'

__license__ = 'BSD'

__version__ = '0.1.3'

import sys

import os

import time

import locale

import signal

from types import ModuleType

from optparse import Option

from pygments.token import Token

from bpython import args as bpargs, repl, translations

from bpython.formatter import theme_map

from bpython.importcompletion import find_coroutine

from bpython.translations import _

from bpython.keys import urwid_key_dispatch as key_dispatch

from bpython._py3compat import PythonLexer, py3

import urwid

import inspect

from inspect import ArgSpec # we eval an ArgSpec repr, see ipython_get_argspec

try:

#python 3

from queue import Empty

except ImportError:

#python 2

from Queue import Empty

Parenthesis = Token.Punctuation.Parenthesis

try:

import subprocess

commit = subprocess.check_output(['git', 'rev-parse', '--short', 'HEAD'], cwd=os.path.dirname(__file__)).strip()

__version__ += ' [' + commit + ']'

except:

pass

version = '%s (Python %s) ' % (__version__, sys.version.split()[0])

# Urwid colors are:

# 'black', 'dark red', 'dark green', 'brown', 'dark blue',

# 'dark magenta', 'dark cyan', 'light gray', 'dark gray',

# 'light red', 'light green', 'yellow', 'light blue',

# 'light magenta', 'light cyan', 'white'

# and bpython has:

# blacK, Red, Green, Yellow, Blue, Magenta, Cyan, White, Default

COLORMAP = {

'k': 'black',

'r': 'dark red', # or light red?

'g': 'dark green', # or light green?

'y': 'yellow',

'b': 'dark blue', # or light blue?

'm': 'dark magenta', # or light magenta?

'c': 'dark cyan', # or light cyan?

'w': 'white',

'd': 'default',

}

# Add our keys to the urwid command_map

bipy_func = """

def get_object(name):

attributes = name.split('.')

obj = eval(attributes.pop(0))

while attributes:

#with AttrCleaner(obj):

obj = getattr(obj, attributes.pop(0))

return obj

def bipy_argspec(func):

try:

f = get_object(func)

except (AttributeError, NameError, SyntaxError):

return False

if inspect.isclass(f):

try:

if f.__init__ is not object.__init__:

f = f.__init__

except AttributeError:

return None

return getargspec(func, f)

"""

hack_path = os.path.dirname(__file__)

with open(os.path.join(hack_path, 'inspection_standalone.py')) as f:

bipy_func = f.read() + bipy_func

try:

from twisted.internet import protocol

from twisted.protocols import basic

except ImportError:

pass

else:

class EvalProtocol(basic.LineOnlyReceiver):

delimiter = '\n'

def __init__(self, myrepl):

self.repl = myrepl

def lineReceived(self, line):

# HACK!

# TODO: deal with encoding issues here...

self.repl.main_loop.process_input(line)

self.repl.main_loop.process_input(['enter'])

class EvalFactory(protocol.ServerFactory):

def __init__(self, myrepl):

self.repl = myrepl

def buildProtocol(self, addr):

return EvalProtocol(self.repl)

# XXX: copy-paste eng from vim-ipython

import re

# from http://serverfault.com/questions/71285/in-centos-4-4-how-can-i-strip-escape-sequences-from-a-text-file

strip = re.compile('\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]')

def strip_color_escapes(s):

return strip.sub('',s)

# If Twisted is not available urwid has no TwistedEventLoop attribute.

# Code below will try to import reactor before using TwistedEventLoop.

# I assume TwistedEventLoop will be available if that import succeeds.

if urwid.VERSION < (1, 0, 0) and hasattr(urwid, 'TwistedEventLoop'):

class TwistedEventLoop(urwid.TwistedEventLoop):

"""TwistedEventLoop modified to properly stop the reactor.

urwid 0.9.9 and 0.9.9.1 crash the reactor on ExitMainLoop instead

of stopping it. One obvious way this breaks is if anything used

the reactor's thread pool: that thread pool is not shut down if

the reactor is not stopped, which means python hangs on exit

(joining the non-daemon threadpool threads that never exit). And

the default resolver is the ThreadedResolver, so if we looked up

any names we hang on exit. That is bad enough that we hack up

urwid a bit here to exit properly.

"""

def handle_exit(self, f):

def wrapper(*args, **kwargs):

try:

return f(*args, **kwargs)

except urwid.ExitMainLoop:

# This is our change.

self.reactor.stop()

except:

# This is the same as in urwid.

# We are obviously not supposed to ever hit this.

import sys

print(sys.exc_info())

self._exc_info = sys.exc_info()

self.reactor.crash()

return wrapper

else:

TwistedEventLoop = getattr(urwid, 'TwistedEventLoop', None)

class StatusbarEdit(urwid.Edit):

"""Wrapper around urwid.Edit used for the prompt in Statusbar.

This class only adds a single signal that is emitted if the user presses

Enter."""

signals = urwid.Edit.signals + ['prompt_enter']

def __init__(self, *args, **kwargs):

self.single = False

urwid.Edit.__init__(self, *args, **kwargs)

def keypress(self, size, key):

if self.single:

urwid.emit_signal(self, 'prompt_enter', self, key)

elif key == 'enter':

urwid.emit_signal(self, 'prompt_enter', self, self.get_edit_text())

else:

return urwid.Edit.keypress(self, size, key)

urwid.register_signal(StatusbarEdit, 'prompt_enter')

class Statusbar(object):

"""Statusbar object, ripped off from bpython.cli.

This class provides the status bar at the bottom of the screen.

It has message() and prompt() methods for user interactivity, as

well as settext() and clear() methods for changing its appearance.

The check() method needs to be called repeatedly if the statusbar is

going to be aware of when it should update its display after a message()

has been called (it'll display for a couple of seconds and then disappear).

It should be called as:

foo = Statusbar('Initial text to display')

or, for a blank statusbar:

foo = Statusbar()

The "widget" attribute is an urwid widget.

"""

signals = ['prompt_result']

def __init__(self, config, s=None, main_loop=None):

self.config = config

self.timer = None

self.main_loop = main_loop

self.s = s or ''

self.text = urwid.Text(('main', self.s))

# use wrap mode 'clip' to just cut off at the end of line

self.text.set_wrap_mode('clip')

self.edit = StatusbarEdit(('main', ''))

urwid.connect_signal(self.edit, 'prompt_enter', self._on_prompt_enter)

self.widget = urwid.Columns([self.text, self.edit])

def _check(self, callback, userdata=None):

"""This is the method is called from the timer to reset the status bar."""

self.timer = None

self.settext(self.s)

def message(self, s, n=3):

"""Display a message for a short n seconds on the statusbar and return

it to its original state."""

self.settext(s)

self.timer = self.main_loop.set_alarm_in(n, self._check)

def _reset_timer(self):

"""Reset the timer from message."""

if self.timer is not None:

self.main_loop.remove_alarm(self.timer)

self.timer = None

def prompt(self, s=None, single=False):

"""Prompt the user for some input (with the optional prompt 's'). After

the user hit enter the signal 'prompt_result' will be emited and the

status bar will be reset. If single is True, the first keypress will be

returned."""

self._reset_timer()

self.edit.single = single

self.edit.set_caption(('main', s or '?'))

self.edit.set_edit_text('')

# hide the text and display the edit widget

if not self.edit in self.widget.widget_list:

self.widget.widget_list.append(self.edit)

if self.text in self.widget.widget_list:

self.widget.widget_list.remove(self.text)

self.widget.set_focus_column(0)

def settext(self, s, permanent=False):

"""Set the text on the status bar to a new value. If permanent is True,

the new value will be permanent. If that status bar is in prompt mode,

the prompt will be aborted. """

self._reset_timer()

# hide the edit and display the text widget

if self.edit in self.widget.widget_list:

self.widget.widget_list.remove(self.edit)

if not self.text in self.widget.widget_list:

self.widget.widget_list.append(self.text)

self.text.set_text(('main', s))

if permanent:

self.s = s

def clear(self):

"""Clear the status bar."""

self.settext('')

def _on_prompt_enter(self, edit, new_text):

"""Reset the statusbar and pass the input from the prompt to the caller

via 'prompt_result'."""

self.settext(self.s)

urwid.emit_signal(self, 'prompt_result', new_text)

urwid.register_signal(Statusbar, 'prompt_result')

def decoding_input_filter(keys, raw):

"""Input filter for urwid which decodes each key with the locale's

preferred encoding.'"""

encoding = locale.getpreferredencoding()

converted_keys = list()

for key in keys:

if isinstance(key, basestring):

converted_keys.append(key.decode(encoding))

else:

converted_keys.append(key)

return converted_keys

def format_tokens(tokensource):

for token, text in tokensource:

if text == '\n':

continue

# TODO: something about inversing Parenthesis

while token not in theme_map:

token = token.parent

yield (theme_map[token], text)

class BPythonEdit(urwid.Edit):

"""Customized editor *very* tightly interwoven with URWIDRepl.

Changes include:

- The edit text supports markup, not just the caption.

This works by calling set_edit_markup from the change event

as well as whenever markup changes while text does not.

- The widget can be made readonly, which currently just means

it is no longer selectable and stops drawing the cursor.

This is currently a one-way operation, but that is just because

I only need and test the readwrite->readonly transition.

- move_cursor_to_coords is ignored

(except for internal calls from keypress or mouse_event).

- arrow up/down are ignored.

- an "edit-pos-changed" signal is emitted when edit_pos changes.

"""

signals = ['edit-pos-changed']

def __init__(self, config, *args, **kwargs):

self._bpy_text = ''

self._bpy_attr = []

self._bpy_selectable = True

self._bpy_may_move_cursor = False

self.config = config

self.tab_length = config.tab_length

urwid.Edit.__init__(self, *args, **kwargs)

def set_edit_pos(self, pos):

urwid.Edit.set_edit_pos(self, pos)

self._emit("edit-pos-changed", self.edit_pos)

def get_edit_pos(self):

return self._edit_pos

edit_pos = property(get_edit_pos, set_edit_pos)

def make_readonly(self):

self._bpy_selectable = False

# This is necessary to prevent the listbox we are in getting

# fresh cursor coords of None from get_cursor_coords

# immediately after we go readonly and then getting a cached

# canvas that still has the cursor set. It spots that

# inconsistency and raises.

self._invalidate()

def set_edit_markup(self, markup):

"""Call this when markup changes but the underlying text does not.

You should arrange for this to be called from the 'change' signal.

"""

if markup:

self._bpy_text, self._bpy_attr = urwid.decompose_tagmarkup(markup)

else:

# decompose_tagmarkup in some urwids fails on the empty list

self._bpy_text, self._bpy_attr = '', []

# This is redundant when we're called off the 'change' signal.

# I'm assuming this is cheap, making that ok.

self._invalidate()

def get_text(self):

return self._caption + self._bpy_text, self._attrib + self._bpy_attr

def selectable(self):

return self._bpy_selectable

def get_cursor_coords(self, *args, **kwargs):

# urwid gets confused if a nonselectable widget has a cursor position.

if not self._bpy_selectable:

return None

return urwid.Edit.get_cursor_coords(self, *args, **kwargs)

def render(self, size, focus=False):

# XXX I do not want to have to do this, but listbox gets confused

# if I do not (getting None out of get_cursor_coords because

# we just became unselectable, then having this render a cursor)

if not self._bpy_selectable:

focus = False

return urwid.Edit.render(self, size, focus=focus)

def get_pref_col(self, size):

# Need to make this deal with us being nonselectable

if not self._bpy_selectable:

return 'left'

return urwid.Edit.get_pref_col(self, size)

def move_cursor_to_coords(self, *args):

if self._bpy_may_move_cursor:

return urwid.Edit.move_cursor_to_coords(self, *args)

return False

def keypress(self, size, key):

if urwid.command_map[key] in ['cursor up', 'cursor down']:

# Do not handle up/down arrow, leave them for the repl.

#sys.stderr.write("cursor keys")

return key

self._bpy_may_move_cursor = True

try:

if urwid.command_map[key] == 'cursor max left':

self.edit_pos = 0

elif urwid.command_map[key] == 'cursor max right':

self.edit_pos = len(self.get_edit_text())

elif urwid.command_map[key] == 'clear word':

# ^w

if self.edit_pos == 0:

return

line = self.get_edit_text()

# delete any space left of the cursor

p = len(line[:self.edit_pos].strip())

line = line[:p] + line[self.edit_pos:]

# delete a full word

# XXX: fugly word splitting heuristics, but better than just

# slitting on space

np = max(

line.rfind(' ', 0, p),

line.rfind('.', 0, p-1),

line.rfind('(', 0, p-1),

line.rfind('=', 0, p-1)

) + 1

if np == -1:

line = line[p:]

np = 0

else:

line = line[:np] + line[p:]

self.set_edit_text(line)

self.edit_pos = np

elif urwid.command_map[key] == 'clear line':

line = self.get_edit_text()

self.set_edit_text(line[self.edit_pos:])

self.edit_pos = 0

elif key == 'backspace':

line = self.get_edit_text()

cpos = len(line) - self.edit_pos

if not (cpos or len(line) % self.tab_length or line.strip()):

self.set_edit_text(line[:-self.tab_length])

else:

return urwid.Edit.keypress(self, size, key)

else:

# TODO: Add in specific keypress fetching code here

return urwid.Edit.keypress(self, size, key)

return None

finally:

self._bpy_may_move_cursor = False

def mouse_event(self, *args):

self._bpy_may_move_cursor = True

try:

return urwid.Edit.mouse_event(self, *args)

finally:

self._bpy_may_move_cursor = False

class BPythonListBox(urwid.ListBox):

"""Like `urwid.ListBox`, except that it does not eat up and

down keys.

"""

def keypress(self, size, key):

if key not in ["up", "down"]:

return urwid.ListBox.keypress(self, size, key)

return key

class Tooltip(urwid.BoxWidget):

"""Container inspired by Overlay to position our tooltip.

bottom_w should be a BoxWidget.

The top window currently has to be a listbox to support shrinkwrapping.

This passes keyboard events to the bottom instead of the top window.

It also positions the top window relative to the cursor position

from the bottom window and hides it if there is no cursor.

"""

def __init__(self, bottom_w, listbox):

self.__super.__init__()

self.bottom_w = bottom_w

self.listbox = listbox

# TODO: this linebox should use the 'main' color.

self.top_w = urwid.LineBox(listbox)

self.tooltip_focus = False

def selectable(self):

return self.bottom_w.selectable()

def keypress(self, size, key):

return self.bottom_w.keypress(size, key)

def mouse_event(self, size, event, button, col, row, focus):

# TODO: pass to top widget if visible and inside it.

if not hasattr(self.bottom_w, 'mouse_event'):

return False

return self.bottom_w.mouse_event(

size, event, button, col, row, focus)

def get_cursor_coords(self, size):

return self.bottom_w.get_cursor_coords(size)

def render(self, size, focus=False):

maxcol, maxrow = size

bottom_c = self.bottom_w.render(size, focus)

cursor = bottom_c.cursor

if not cursor:

# Hide the tooltip if there is no cursor.

return bottom_c

cursor_x, cursor_y = cursor

if cursor_y * 2 < maxrow:

# Cursor is in the top half. Tooltip goes below it:

y = cursor_y + 1

rows = maxrow - y

else:

# Cursor is in the bottom half. Tooltip fills the area above:

y = 0

rows = cursor_y

# HACK: shrink-wrap the tooltip. This is ugly in multiple ways:

# - It only works on a listbox.

# - It assumes the wrapping LineBox eats one char on each edge.

# - It is a loop.

# (ideally it would check how much free space there is,

# instead of repeatedly trying smaller sizes)

while 'bottom' in self.listbox.ends_visible((maxcol - 2, rows - 3)):

rows -= 1

# If we're displaying above the cursor move the top edge down:

if not y:

y = cursor_y - rows

# Render *both* windows focused. This is probably not normal in urwid,

# but it works nicely.

top_c = self.top_w.render((maxcol, rows),

focus and self.tooltip_focus)

combi_c = urwid.CanvasOverlay(top_c, bottom_c, 0, y)

# Use the cursor coordinates from the bottom canvas.

canvas = urwid.CompositeCanvas(combi_c)

canvas.cursor = cursor

return canvas

class URWIDInteraction(repl.Interaction):

def __init__(self, config, statusbar, frame):

repl.Interaction.__init__(self, config, statusbar)

self.frame = frame

urwid.connect_signal(statusbar, 'prompt_result', self._prompt_result)

self.callback = None

def confirm(self, q, callback):

"""Ask for yes or no and call callback to return the result"""

def callback_wrapper(result):

callback(result.lower() in (_('y'), _('yes')))

self.prompt(q, callback_wrapper, single=True)

def notify(self, s, n=10):

return self.statusbar.message(s, n)

def prompt(self, s, callback=None, single=False):

"""Prompt the user for input. The result will be returned via calling

callback. Note that there can only be one prompt active. But the

callback can already start a new prompt."""

if self.callback is not None:

raise Exception('Prompt already in progress')

self.callback = callback

self.statusbar.prompt(s, single=single)

self.frame.set_focus('footer')

def _prompt_result(self, text):

self.frame.set_focus('body')

if self.callback is not None:

# The callback might want to start another prompt, so reset it

# before calling the callback.

callback = self.callback

self.callback = None

callback(text)

class NotIPythonKernel(Exception):

pass

class IPythonHistory(repl.History):

"""A history mechanism that interacts with IPython.

This relies on the standard IPython kernel, because it uses

`get_ipyton().history_manager` to fetch results.

As a fall back, local readline completion should be implemented when a new

instance of IPythonHistory can not initialize and raises an error.

"""

def __init__(self, repl):

"""The required argument is a handle on the repl, which will be ued to

communicate with the IPython kernel. If a connection cannot be made,

or no expected results are returned, we raise a NotIPythonKernel

error, so that the vanilla readline completion can continue to be used

as a fallback.

"""

msg_id = repl.send_ipython('', silent=False, user_expressions={ 'hist':

"list(get_ipython().history_manager.get_range())"})

# XXX: for now we only grab history from current sesssion

#"list(get_ipython().history_manager.get_tail(100))"})

#silent=True)

output = repl.ipython_get_child_msg(msg_id)['content']

hist = eval(output['user_expressions']['hist']['data']['text/plain'])

self.hist = hist

repl.debug_docstring = str(hist)

repl.debug_docstring = ''

self.entries = ['']

self.index = 0

self.saved_line = ''

self.duplicates = True # allow duplicates

self.repl = repl

self.load()

#raise NotIPythonKernel()

def load(self, *args, **kwargs):

"""Load history from a live IPython session.

Arguments are ignored, and are only listed here for API compatibility

with bpython's History class, which takes `filename` and `encoding`

arguments, but those don't make sense in this instance.

"""

# XXX: stopgap: get the history from ipython, write it to a file, and

# proceed with the normal load after that

for line in self.hist:

self.append(line[-1])

self.repl.stdout_hist += "\n" + line[-1]

def save(self, *args, **kw):

pass

class URWIDRepl(repl.Repl):

_time_between_redraws = .05 # seconds

rl_history_reset = False

def __init__(self, event_loop, palette, interpreter, config):

repl.Repl.__init__(self, interpreter, config)

self._redraw_handle = None

self._redraw_pending = False

self._redraw_time = 0

self.listbox = BPythonListBox(urwid.SimpleListWalker([]))

self.tooltip = urwid.ListBox(urwid.SimpleListWalker([]))

self.tooltip.grid = None

self.overlay = Tooltip(self.listbox, self.tooltip)

self.stdout_hist = ''

self.frame = urwid.Frame(self.overlay)

if urwid.get_encoding_mode() == 'narrow':

input_filter = decoding_input_filter

else:

input_filter = None

# This constructs a raw_display.Screen, which nabs sys.stdin/out.

self.main_loop = urwid.MainLoop(

self.frame, palette,

event_loop=event_loop, unhandled_input=self.handle_input,

input_filter=input_filter, handle_mouse=False)

# String is straight from bpython.cli

self.statusbar = Statusbar(config,

_(" <%s> Rewind <%s> Save <%s> Pastebin "

" <%s> Pager <%s> Show Source ") %

(config.undo_key, config.save_key, config.pastebin_key,

config.last_output_key, config.show_source_key), self.main_loop)

self.frame.set_footer(self.statusbar.widget)

self.interact = URWIDInteraction(self.config, self.statusbar, self.frame)

self.edits = []

self.edit = None

self.current_output = None

self._completion_update_suppressed = False

# Bulletproof: this is a value extract_exit_value accepts.

self.exit_value = ()

load_urwid_command_map(config)

self.debug_docstring = ''

self.ipython = self.connect_ipython_kernel()

self.ipy_execution_count = '0'

self.docstring_widget = None

@property

def ipy_ps1(self):

return "In [%d]: " % (int(self.ipy_execution_count) + 1)

def connect_ipython_kernel(self, s=''):

"""create kernel manager from IPKernelApp string

such as '--shell=47378 --iopub=39859 --stdin=36778 --hb=52668' for IPython 0.11

or just 'kernel-12345.json' for IPython 0.12

XXX: copy-paste engineering from vim-ipython. Proceed with caution

"""

def echo(x):

print(x)

try:

import IPython

except ImportError:

raise ImportError("Could not find IPython. bipython needs it")

from IPython.config.loader import KeyValueConfigLoader

try:

from IPython.kernel import (

KernelManager,

find_connection_file,

)

except ImportError:

# IPython < 1.0

from IPython.zmq.blockingkernelmanager import BlockingKernelManager as KernelManager

from IPython.zmq.kernelapp import kernel_aliases

try:

from IPython.lib.kernel import find_connection_file

except ImportError:

# < 0.12, no find_connection_file

pass

s = s.replace('--existing', '')

if 'connection_file' in KernelManager.class_trait_names():

# 0.12 uses files instead of a collection of ports

# include default IPython search path

# filefind also allows for absolute paths, in which case the search

# is ignored

try:

# XXX: the following approach will be brittle, depending on what

# connection strings will end up looking like in the future, and

# whether or not they are allowed to have spaces. I'll have to sync

# up with the IPython team to address these issues -pi

if '--profile' in s:

k,p = s.split('--profile')

k = k.lstrip().rstrip() # kernel part of the string

p = p.lstrip().rstrip() # profile part of the string

fullpath = find_connection_file(k,p)

else:

fullpath = find_connection_file(s.lstrip().rstrip())

except IOError as e:

self.echod(":IPython " + s + " failed")

self.echod("^-- failed '" + s + "' not found")

over_the_line()

km = KernelManager(connection_file = fullpath)

km.load_connection_file()

else:

if s == '':

self.echod(":IPython 0.11 requires the full connection string")

over_the_line()

loader = KeyValueConfigLoader(s.split(), aliases=kernel_aliases)

cfg = loader.load_config()['KernelApp']

try:

ip = '127.0.0.1'

km = KernelManager(

shell_address=(ip, cfg['shell_port']),

sub_address=(ip, cfg['iopub_port']),

stdin_address=(ip, cfg['stdin_port']),

hb_address=(ip, cfg['hb_port']))

except KeyError as e:

self.echod(":IPython " +s + " failed")

self.echod("^-- failed --"+e.message.replace('_port','')+" not specified")

over_the_line()

try:

kc = km.client()

except AttributeError:

# 0.13

kc = km

kc.start_channels()

self.send_ipython = kc.shell_channel.execute

#XXX: backwards compatibility for IPython < 0.13

sc = kc.shell_channel

num_oinfo_args = len(inspect.getargspec(sc.object_info).args)

if num_oinfo_args == 2:

# patch the object_info method which used to only take one argument

klass = sc.__class__

klass._oinfo_orig = klass.object_info

klass.object_info = lambda s,x,y: s._oinfo_orig(x)

#XXX: backwards compatibility for IPython < 1.0

if not hasattr(kc, 'iopub_channel'):

kc.iopub_channel = kc.sub_channel

self.km = km

self.kc = kc

print(km)

msg_id = self.send_ipython('# bpython ' + version + ' connected\n')

try:

child = self.ipython_get_child_msg(msg_id)

except Empty:

over_the_line()

self.send_ipython(bipy_func, silent=True)

# TODO: get a proper history navigator

#

try:

self.rl_history = IPythonHistory(self)

except NotIPythonKernel:

# We must not be running an IPython Kernel

#sys.stderr.write(

self.debug_docstring = "could not access IPython history, falling back to readline"

sys.stderr.flush()

pass

self.ipython_set_pid()

return km

def _get_args(self):

"""Check if an unclosed parenthesis exists, then attempt to get the

argspec() for it. On success, update self.argspec and return True,

otherwise set self.argspec to None and return False"""

self.current_func = None

if not self.config.arg_spec:

self.echo('i suck')

return False

#self.echod('\ri rule')

# Get the name of the current function and where we are in

# the arguments

stack = [['', 0, '']]

try:

for (token, value) in PythonLexer().get_tokens(

self.current_line()):

if token is Token.Punctuation:

if value in '([{':

stack.append(['', 0, value])

elif value in ')]}':

stack.pop()

elif value == ',':

try:

stack[-1][1] += 1

except TypeError:

stack[-1][1] = ''

stack[-1][0] = ''

elif value == ':' and stack[-1][2] == 'lambda':

stack.pop()

else:

stack[-1][0] = ''

elif (token is Token.Name or token in Token.Name.subtypes or

token is Token.Operator and value == '.'):

stack[-1][0] += value

elif token is Token.Operator and value == '=':

stack[-1][1] = stack[-1][0]

stack[-1][0] = ''

elif token is Token.Keyword and value == 'lambda':

stack.append(['', 0, value])

else:

stack[-1][0] = ''

while stack[-1][2] in '[{':

stack.pop()

_, arg_number, _ = stack.pop()

func, _, _ = stack.pop()

except IndexError:

return False

if not func:

return False

#self.echod('here we go, func is ' + func)

self.current_func = func

# XXX: this code needs to run on the ipython side

# - can we recreate an argspec on this side after getting it

# from the other side. ... break on through to the other side!

#

# looks like we can. Just need to get an ArgSpec back

self.argspec = self.ipython_get_argspec(func)

if self.argspec:

self.argspec.append(arg_number)

return True

return False

def complete(self, tab=False):

"bipython completion - punt to ipython"

self.docstring = ''

returned = self.ipython_process_msgs()

#if returned:

# self.docstring = "\n".join(returned)

if self.debug_docstring:

self.docstring = self.debug_docstring

if not self._get_args():

self.argspec = None

if self.current_func is not None:

self.ipython_get_doc(self.current_func)

pos = self.edit.edit_pos

text = self.edit.get_edit_text()

cw = self.cw() or ''

if not cw and not tab:

# don't trigger automatic completion on empty lines

self.matches = []

self.matches_iter.update()

return False or self.docstring #and self.docstring.find('ipython') != -1

#else:

# self.docstring = 'yak yak yak!'

self.matches = self.ipython_complete(cw, text, pos)

self.matches_iter.update(cw, self.matches)

return bool(self.matches) or self.docstring

#if tab:

# return bool(self.matches)

#return False

#cs = self.current_string()

# Subclasses of Repl need to implement echo, current_line, cw

def echod(self, orig_s):

#self.write(orig_s)

if self.edit:

self.edit.set_caption(orig_s)

def echo(self, orig_s):

got_string = not isinstance(orig_s, list)

s = orig_s

if got_string:

s = orig_s.rstrip('\n')

if True:

if self.current_output is None:

# XXX: hacky post-parsing of output here..

if not got_string:

self.current_output = orig_s

else:

self.current_output = urwid.Text(('output', s))

if self.edit is None:

self.listbox.body.append(self.current_output)

# Focus the widget we just added to force the

# listbox to scroll. This causes output to scroll

# if the user runs a blocking call that prints

# more than a screenful, instead of staying

# scrolled to the previous input line and then

# jumping to the bottom when done.

self.listbox.set_focus(len(self.listbox.body) - 1)

else:

self.listbox.body.insert(-1, self.current_output)

# The edit widget should be focused and *stay* focused.

# XXX TODO: make sure the cursor stays in the same spot.

self.listbox.set_focus(len(self.listbox.body) - 1)

else:

# XXX this assumes this all has "output" markup applied.

if got_string:

self.current_output.set_text(

('output', self.current_output.text + s))