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# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""utilities methods and classes for reporters
Copyright (c) 2000-2003 LOGILAB S.A. (Paris, FRANCE).
http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
import sys
CMPS = ['=', '-', '+']
def diff_string(old, new):
"""given a old and new int value, return a string representing the
difference
"""
diff = abs(old - new)
diff_str = "%s%s" % (CMPS[cmp(old, new)], diff and ('%.2f' % diff) or '')
return diff_str
class EmptyReport(Exception):
"""raised when a report is empty and so should not be displayed"""
class BaseReporter:
"""base class for reporters"""
extension = ''
def __init__(self, output=None):
self.linter = None
self.include_ids = None
self.section = 0
self.out = None
self.set_output(output)
def set_output(self, output=None):
"""set output stream"""
if output is None:
output = sys.stdout
self.out = output
def writeln(self, string=''):
"""write a line in the output buffer"""
print >> self.out, string
def display_results(self, layout):
"""display results encapsulated in the layout tree"""
self.section = 0
if self.include_ids and hasattr(layout, 'report_id'):
layout.children[0].children[0].data += ' (%s)' % layout.report_id
self._display(layout)
def _display(self, layout):
"""display the layout"""
raise NotImplementedError()
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