97 lines
3.0 KiB
Python
97 lines
3.0 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright © 2008-2010 Chris Jones <tortoise@tortuga>
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# Copyright © 2010 Francesco Fumanti <francesco.fumanti@gmx.net>
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# Copyright © 2011-2014 marmuta <marmvta@gmail.com>
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#
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# This file is part of Onboard.
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#
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# Onboard is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Onboard is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import division, print_function, unicode_literals
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import sys
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from Onboard.utils import unicode_str
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class ChainableError(Exception):
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"""
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Base class for Onboard errors
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We want Python to print the stacktrace of the first exception in the chain
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so we store the last stacktrace if the previous exception in the chain
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has not.
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"""
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_last_exception = None
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def __init__(self, message, chained_exception = None):
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self._message = message
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self.chained_exception = chained_exception
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if chained_exception:
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if not (isinstance(chained_exception, ChainableError) \
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and chained_exception.traceback):
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# Store last traceback
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self._last_exception = sys.exc_info()
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def _get_traceback(self):
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if self._last_exception:
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return self._last_exception[2]
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elif self.chained_exception \
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and isinstance(self.chained_exception, ChainableError):
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return self.chained_exception.traceback
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else:
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return None
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traceback = property(_get_traceback)
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def __str__(self):
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message = unicode_str(self._message)
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if self.chained_exception:
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message += ", " + unicode_str(self.chained_exception)
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return message
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class SVGSyntaxError(ChainableError):
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"""Error raised when Onboard can't comprehend SVG layout file."""
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pass
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class LayoutFileError(ChainableError):
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"""Error raised when Onboard can't comprehend layout definition file."""
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pass
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class ThemeFileError(ChainableError):
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"""Error raised when Onboard can't comprehend theme definition file."""
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pass
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class ColorSchemeFileError(ChainableError):
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"""Error raised when Onboard can't comprehend color
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scheme definition file."""
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pass
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class SchemaError(ChainableError):
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"""Error raised when a gesettings schema does not exist """
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pass
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def chain_handler(type, value, traceback):
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"""
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Wrap the default handler so that we can get the traceback from chained
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exceptions.
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"""
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if isinstance(value, ChainableError) and value.traceback:
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traceback = value.traceback
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sys.__excepthook__(type, value, traceback)
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