135 lines
4.8 KiB
Python
135 lines
4.8 KiB
Python
#!/usr/bin/python
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# Terminator - multiple gnome terminals in one window
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# Copyright (C) 2006-2010 cmsj@tenshu.net
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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, version 2 only.
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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, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Terminator by Chris Jones <cmsj@tenshu.net>
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Validator and functions for dealing with Terminator's customisable
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keyboard shortcuts.
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"""
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import re
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import gtk
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from util import err
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class KeymapError(Exception):
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"""Custom exception for errors in keybinding configurations"""
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def __init__(self, value):
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Exception.__init__(self, value)
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self.value = value
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self.action = 'unknown'
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def __str__(self):
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return "Keybinding '%s' invalid: %s" % (self.action, self.value)
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MODIFIER = re.compile('<([^<]+)>')
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class Keybindings:
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"""Class to handle loading and lookup of Terminator keybindings"""
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modifiers = {
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'ctrl': gtk.gdk.CONTROL_MASK,
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'control': gtk.gdk.CONTROL_MASK,
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'shift': gtk.gdk.SHIFT_MASK,
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'alt': gtk.gdk.MOD1_MASK,
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'super': gtk.gdk.SUPER_MASK,
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}
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empty = {}
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keys = None
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_masks = None
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_lookup = None
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def __init__(self):
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self.keymap = gtk.gdk.keymap_get_default()
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self.configure({})
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def configure(self, bindings):
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"""Accept new bindings and reconfigure with them"""
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self.keys = bindings
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self.reload()
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def reload(self):
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"""Parse bindings and mangle into an appropriate form"""
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self._lookup = {}
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self._masks = 0
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for action, bindings in self.keys.items():
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if not isinstance(bindings, tuple):
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bindings = (bindings,)
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for binding in bindings:
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if binding is None or binding == "None":
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continue
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try:
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keyval, mask = self._parsebinding(binding)
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# Does much the same, but with poorer error handling.
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#keyval, mask = gtk.accelerator_parse(binding)
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except KeymapError, ex:
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continue
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else:
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if mask & gtk.gdk.SHIFT_MASK:
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if keyval == gtk.keysyms.Tab:
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keyval = gtk.keysyms.ISO_Left_Tab
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mask &= ~gtk.gdk.SHIFT_MASK
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else:
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keyvals = gtk.gdk.keyval_convert_case(keyval)
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if keyvals[0] != keyvals[1]:
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keyval = keyvals[1]
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mask &= ~gtk.gdk.SHIFT_MASK
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else:
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keyval = gtk.gdk.keyval_to_lower(keyval)
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self._lookup.setdefault(mask, {})
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self._lookup[mask][keyval] = action
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self._masks |= mask
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def _parsebinding(self, binding):
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"""Parse an individual binding using gtk's binding function"""
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mask = 0
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modifiers = re.findall(MODIFIER, binding)
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if modifiers:
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for modifier in modifiers:
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mask |= self._lookup_modifier(modifier)
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key = re.sub(MODIFIER, '', binding)
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if key == '':
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raise KeymapError('No key found')
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keyval = gtk.gdk.keyval_from_name(key)
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if keyval == 0:
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raise KeymapError("Key '%s' is unrecognised" % key)
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return (keyval, mask)
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def _lookup_modifier(self, modifier):
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"""Map modifier names to gtk values"""
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try:
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return self.modifiers[modifier.lower()]
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except KeyError:
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raise KeymapError("Unhandled modifier '<%s>'" % modifier)
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def lookup(self, event):
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"""Translate a keyboard event into a mapped key"""
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try:
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keyval, egroup, level, consumed = self.keymap.translate_keyboard_state(
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event.hardware_keycode,
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event.state & ~gtk.gdk.LOCK_MASK,
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event.group)
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except TypeError:
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err ("keybindings.lookup failed to translate keyboard event: %s" %
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dir(event))
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return None
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mask = (event.state & ~consumed) & self._masks
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return self._lookup.get(mask, self.empty).get(keyval, None)
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