|
|
# encoding: utf-8
|
|
|
"""
|
|
|
Simple utility for splitting user input. This is used by both inputsplitter and
|
|
|
prefilter.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Brian Granger
|
|
|
* Fernando Perez
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import re
|
|
|
import sys
|
|
|
|
|
|
from IPython.utils import py3compat
|
|
|
from IPython.utils.encoding import get_stream_enc
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main function
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# RegExp for splitting line contents into pre-char//first word-method//rest.
|
|
|
# For clarity, each group in on one line.
|
|
|
|
|
|
# WARNING: update the regexp if the escapes in interactiveshell are changed, as
|
|
|
# they are hardwired in.
|
|
|
|
|
|
# Although it's not solely driven by the regex, note that:
|
|
|
# ,;/% only trigger if they are the first character on the line
|
|
|
# ! and !! trigger if they are first char(s) *or* follow an indent
|
|
|
# ? triggers as first or last char.
|
|
|
|
|
|
line_split = re.compile("""
|
|
|
^(\s*) # any leading space
|
|
|
([,;/%]|!!?|\?\??)? # escape character or characters
|
|
|
\s*(%?[\w\.\*]*) # function/method, possibly with leading %
|
|
|
# to correctly treat things like '?%magic'
|
|
|
(.*?$|$) # rest of line
|
|
|
""", re.VERBOSE)
|
|
|
|
|
|
def split_user_input(line, pattern=None):
|
|
|
"""Split user input into initial whitespace, escape character, function part
|
|
|
and the rest.
|
|
|
"""
|
|
|
# We need to ensure that the rest of this routine deals only with unicode
|
|
|
encoding = get_stream_enc(sys.stdin, 'utf-8')
|
|
|
line = py3compat.cast_unicode(line, encoding)
|
|
|
|
|
|
if pattern is None:
|
|
|
pattern = line_split
|
|
|
match = pattern.match(line)
|
|
|
if not match:
|
|
|
# print "match failed for line '%s'" % line
|
|
|
try:
|
|
|
ifun, the_rest = line.split(None,1)
|
|
|
except ValueError:
|
|
|
# print "split failed for line '%s'" % line
|
|
|
ifun, the_rest = line, u''
|
|
|
pre = re.match('^(\s*)(.*)',line).groups()[0]
|
|
|
esc = ""
|
|
|
else:
|
|
|
pre, esc, ifun, the_rest = match.groups()
|
|
|
|
|
|
#print 'line:<%s>' % line # dbg
|
|
|
#print 'pre <%s> ifun <%s> rest <%s>' % (pre,ifun.strip(),the_rest) # dbg
|
|
|
return pre, esc or '', ifun.strip(), the_rest.lstrip()
|
|
|
|
|
|
class LineInfo(object):
|
|
|
"""A single line of input and associated info.
|
|
|
|
|
|
Includes the following as properties:
|
|
|
|
|
|
line
|
|
|
The original, raw line
|
|
|
|
|
|
continue_prompt
|
|
|
Is this line a continuation in a sequence of multiline input?
|
|
|
|
|
|
pre
|
|
|
Any leading whitespace.
|
|
|
|
|
|
esc
|
|
|
The escape character(s) in pre or the empty string if there isn't one.
|
|
|
Note that '!!' and '??' are possible values for esc. Otherwise it will
|
|
|
always be a single character.
|
|
|
|
|
|
ifun
|
|
|
The 'function part', which is basically the maximal initial sequence
|
|
|
of valid python identifiers and the '.' character. This is what is
|
|
|
checked for alias and magic transformations, used for auto-calling,
|
|
|
etc. In contrast to Python identifiers, it may start with "%" and contain
|
|
|
"*".
|
|
|
|
|
|
the_rest
|
|
|
Everything else on the line.
|
|
|
"""
|
|
|
def __init__(self, line, continue_prompt=False):
|
|
|
self.line = line
|
|
|
self.continue_prompt = continue_prompt
|
|
|
self.pre, self.esc, self.ifun, self.the_rest = split_user_input(line)
|
|
|
|
|
|
self.pre_char = self.pre.strip()
|
|
|
if self.pre_char:
|
|
|
self.pre_whitespace = '' # No whitespace allowd before esc chars
|
|
|
else:
|
|
|
self.pre_whitespace = self.pre
|
|
|
|
|
|
self._oinfo = None
|
|
|
|
|
|
def ofind(self, ip):
|
|
|
"""Do a full, attribute-walking lookup of the ifun in the various
|
|
|
namespaces for the given IPython InteractiveShell instance.
|
|
|
|
|
|
Return a dict with keys: found,obj,ospace,ismagic
|
|
|
|
|
|
Note: can cause state changes because of calling getattr, but should
|
|
|
only be run if autocall is on and if the line hasn't matched any
|
|
|
other, less dangerous handlers.
|
|
|
|
|
|
Does cache the results of the call, so can be called multiple times
|
|
|
without worrying about *further* damaging state.
|
|
|
"""
|
|
|
if not self._oinfo:
|
|
|
# ip.shell._ofind is actually on the Magic class!
|
|
|
self._oinfo = ip.shell._ofind(self.ifun)
|
|
|
return self._oinfo
|
|
|
|
|
|
def __str__(self):
|
|
|
return "LineInfo [%s|%s|%s|%s]" %(self.pre, self.esc, self.ifun, self.the_rest)
|
|
|
|
