import re, gtk import terminatorlib.config class KeymapError(Exception): def __init__(self, value): self.value = value self.action = 'unknown' def __str__(self): return "Keybinding '%s' invalid: %s" % (self.action, self.value) Modifier = re.compile('<([^<]+)>') class TerminatorKeybindings: modifiers = { 'ctrl': gtk.gdk.CONTROL_MASK, 'shift': gtk.gdk.SHIFT_MASK, 'alt': gtk.gdk.MOD1_MASK } empty = {} def __init__(self): self.keymap = gtk.gdk.keymap_get_default() self.configure({}) def configure(self, bindings): self.keys = bindings self.reload() def reload(self): self._lookup = {} self._masks = 0 for action, bindings in self.keys.items(): if not isinstance(bindings, tuple): bindings = (bindings,) for binding in bindings: try: keyval, mask = self._parsebinding(binding) # Does much the same, but with poorer error handling. #keyval, mask = gtk.accelerator_parse(binding) except KeymapError, e: e.action = action raise e else: if mask & gtk.gdk.SHIFT_MASK: if keyval == gtk.keysyms.Tab: keyval = gtk.keysyms.ISO_Left_Tab mask &= ~gtk.gdk.SHIFT_MASK else: keyvals = gtk.gdk.keyval_convert_case(keyval) if keyvals[0] != keyvals[1]: keyval = keyvals[1] mask &= ~gtk.gdk.SHIFT_MASK else: keyval = gtk.gdk.keyval_to_lower(keyval) self._lookup.setdefault(mask, {}) self._lookup[mask][keyval] = action self._masks |= mask def _parsebinding(self, binding): mask = 0 modifiers = re.findall(Modifier, binding) if modifiers: for modifier in modifiers: mask |= self._lookup_modifier(modifier) key = re.sub(Modifier, '', binding) if key == '': raise KeymapError('No key found') keyval = gtk.gdk.keyval_from_name(key) if keyval == 0: raise KeymapError("Key '%s' is unrecognised" % key) return (keyval, mask) def _lookup_modifier(self, modifier): try: return self.modifiers[modifier.lower()] except KeyError: raise KeymapError("Unhandled modifier '<%s>'" % modifier) def lookup(self, event): try: keyval, egroup, level, consumed = self.keymap.translate_keyboard_state(event.hardware_keycode, event.state, event.group) except TypeError: err ("keybindings.lookup failed to translate keyboard event: %s"%dir(event)) return None mask = (event.state & ~consumed) & self._masks return self._lookup.get(mask, self.empty).get(event.keyval, None)