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"""Support for interactive macros in IPython"""
#*****************************************************************************
# Copyright (C) 2001-2005 Fernando Perez <fperez@colorado.edu>
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#*****************************************************************************
import re
from IPython.utils import py3compat
from IPython.utils.encoding import DEFAULT_ENCODING
coding_declaration = re.compile(r"#\s*coding[:=]\s*([-\w.]+)")
class Macro(object):
"""Simple class to store the value of macros as strings.
Macro is just a callable that executes a string of IPython
input when called.
"""
def __init__(self,code):
"""store the macro value, as a single string which can be executed"""
lines = []
enc = None
for line in code.splitlines():
coding_match = coding_declaration.match(line)
if coding_match:
enc = coding_match.group(1)
else:
lines.append(line)
code = "\n".join(lines)
if isinstance(code, bytes):
code = code.decode(enc or DEFAULT_ENCODING)
self.value = code + '\n'
def __str__(self):
return py3compat.unicode_to_str(self.value)
def __unicode__(self):
return self.value
def __repr__(self):
return 'IPython.macro.Macro(%s)' % repr(self.value)
def __getstate__(self):
""" needed for safe pickling via %store """
return {'value': self.value}
def __add__(self, other):
if isinstance(other, Macro):
return Macro(self.value + other.value)
elif isinstance(other, py3compat.string_types):
return Macro(self.value + other)
raise TypeError
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