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89 lines
3.1 KiB
89 lines
3.1 KiB
#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# Mitter, a simple client for Twitter |
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# Copyright (C) 2007, 2008 The Mitter Contributors |
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# |
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# This program 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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# This program 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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import logging |
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import os.path |
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from mitterlib import module_search |
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_log = logging.getLogger('mitterlib.ui.Interfaces') |
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# List of files that are not networks |
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SKIPPABLES = ('__init__.py') |
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#-------------------------------------------------------------------- |
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# Helper functions |
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#-------------------------------------------------------------------- |
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def _import_name(module): |
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"""Based on the name of the module, return the proper "import" |
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statement.""" |
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(name, _) = os.path.splitext(module) |
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if name.startswith('ui_'): |
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mask = 'mitterlib.ui.%s' |
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else: |
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mask = 'mitterlib.ui.ui_%s' |
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return mask % (name) |
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class Interfaces(object): |
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"""Interface transparency layer: Check which interfaces are available and |
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tries to load the interface requested by the user.""" |
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def __init__(self, options): |
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self._interfaces = [] |
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self._options = options |
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self.options() |
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return |
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def options(self): |
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"""Request all networks to add their options.""" |
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for module_name in module_search(__file__, SKIPPABLES): |
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import_name = _import_name(module_name) |
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try: |
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_log.debug('Importing module %s', import_name) |
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module = __import__(import_name, fromlist=[import_name]) |
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interface_name = module.Interface.NAMESPACE |
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module.Interface.options(self._options) |
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self._interfaces.append(interface_name) |
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except ImportError, exc: |
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_log.debug('Cannot import module %s', import_name) |
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_log.debug(str(exc)) |
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return |
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def load(self, connection, prefer=None): |
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"""Start the interface, using the prefered one.""" |
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if not self._interfaces: |
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return None |
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if prefer and prefer in self._interfaces: |
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import_name = prefer |
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else: |
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# So we pick the one in the top of the list ('cause we know it's |
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# importable and the user didn't chose anything.) |
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# [we could be mean and use random.choice(self._interfaces)] |
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import_name = self._interfaces[0] |
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_log.debug('Loading interface %s', import_name) |
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module_name = _import_name(import_name) |
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module = __import__(module_name, fromlist=[module_name]) |
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return module.Interface(connection, self._options)
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