71 lines
1.8 KiB
Python
71 lines
1.8 KiB
Python
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import re, gtk
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import terminatorlib.config
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class KeymapError(Exception):
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def __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 TerminatorKeybindings:
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modifiers = {
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'ctrl': 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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}
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empty = {}
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def __init__(self):
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self.configure({})
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def configure(self, bindings):
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self.keys = bindings
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self.reload()
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def reload(self):
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self._lookup = {}
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self._masks = 0
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for action, binding in self.keys.items():
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try:
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mask, key = self._parsebinding(binding)
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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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except KeymapError, e:
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e.action = action
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raise e
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else:
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self._lookup.setdefault(mask, {})
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self._lookup[mask][keyval] = action
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if key == 'Tab':
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self._lookup[mask][gtk.keysyms.ISO_Left_Tab] = action
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self._masks |= mask
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def _parsebinding(self, binding):
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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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return (mask, re.sub(Modifier, '', binding))
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def _lookup_modifier(self, modifier):
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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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mask = event.state & self._masks
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return self._lookup.get(mask, self.empty).get(event.keyval, None)
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