Limnoria/src/unpreserve.py

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###
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# Copyright (c) 2004-2005, Jeremiah Fincher
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# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
class Reader(object):
def __init__(self, Creator, *args, **kwargs):
self.Creator = Creator
self.args = args
self.kwargs = kwargs
self.creator = None
self.modifiedCreator = False
self.indent = None
def normalizeCommand(self, s):
return s.lower()
def readFile(self, filename):
self.read(file(filename))
def read(self, fd):
lineno = 0
for line in fd:
lineno += 1
if not line.strip():
continue
line = line.rstrip('\r\n')
line = line.expandtabs()
s = line.lstrip(' ')
indent = len(line) - len(s)
if indent != self.indent:
# New indentation level.
if self.creator is not None:
self.creator.finish()
self.creator = self.Creator(*self.args, **self.kwargs)
self.modifiedCreator = False
self.indent = indent
(command, rest) = s.split(None, 1)
command = self.normalizeCommand(command)
self.modifiedCreator = True
if hasattr(self.creator, command):
command = getattr(self.creator, command)
command(rest, lineno)
else:
self.creator.badCommand(command, rest, lineno)
if self.modifiedCreator:
self.creator.finish()
# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
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