105 lines
3.2 KiB
Python
105 lines
3.2 KiB
Python
#!/usr/bin/python
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#
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# Urwid CommandMap class
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# Copyright (C) 2004-2011 Ian Ward
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library 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 GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Urwid web site: http://excess.org/urwid/
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REDRAW_SCREEN = 'redraw screen'
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CURSOR_UP = 'cursor up'
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CURSOR_DOWN = 'cursor down'
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CURSOR_LEFT = 'cursor left'
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CURSOR_RIGHT = 'cursor right'
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CURSOR_PAGE_UP = 'cursor page up'
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CURSOR_PAGE_DOWN = 'cursor page down'
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CURSOR_MAX_LEFT = 'cursor max left'
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CURSOR_MAX_RIGHT = 'cursor max right'
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ACTIVATE = 'activate'
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class CommandMap(object):
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"""
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dict-like object for looking up commands from keystrokes
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Default values (key: command)::
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'tab': 'next selectable',
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'ctrl n': 'next selectable',
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'shift tab': 'prev selectable',
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'ctrl p': 'prev selectable',
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'ctrl l': 'redraw screen',
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'esc': 'menu',
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'up': 'cursor up',
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'down': 'cursor down',
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'left': 'cursor left',
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'right': 'cursor right',
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'page up': 'cursor page up',
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'page down': 'cursor page down',
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'home': 'cursor max left',
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'end': 'cursor max right',
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' ': 'activate',
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'enter': 'activate',
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"""
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_command_defaults = {
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'tab': 'next selectable',
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'ctrl n': 'next selectable',
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'shift tab': 'prev selectable',
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'ctrl p': 'prev selectable',
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'ctrl l': REDRAW_SCREEN,
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'esc': 'menu',
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'up': CURSOR_UP,
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'down': CURSOR_DOWN,
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'left': CURSOR_LEFT,
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'right': CURSOR_RIGHT,
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'page up': CURSOR_PAGE_UP,
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'page down': CURSOR_PAGE_DOWN,
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'home': CURSOR_MAX_LEFT,
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'end': CURSOR_MAX_RIGHT,
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' ': ACTIVATE,
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'enter': ACTIVATE,
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}
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def __init__(self):
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self.restore_defaults()
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def restore_defaults(self):
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self._command = dict(self._command_defaults)
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def __getitem__(self, key):
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return self._command.get(key, None)
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def __setitem__(self, key, command):
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self._command[key] = command
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def __delitem__(self, key):
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del self._command[key]
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def clear_command(self, command):
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dk = [k for k, v in self._command.items() if v == command]
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for k in dk:
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del self._command[k]
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def copy(self):
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"""
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Return a new copy of this CommandMap, likely so we can modify
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it separate from a shared one.
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"""
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c = CommandMap()
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c._command = dict(self._command)
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return c
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command_map = CommandMap() # shared command mappings
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