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