113 lines
3.4 KiB
Python
113 lines
3.4 KiB
Python
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# Xlib.ext.ge -- Generic Event extension module
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#
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# Copyright (C) 2012 Outpost Embedded, LLC
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# Forest Bond <forest.bond@rapidrollout.com>
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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 License
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# as published by the Free Software Foundation; either version 2.1
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# 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.
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# See the GNU 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
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# Free Software Foundation, Inc.,
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# 59 Temple Place,
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# Suite 330,
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# Boston, MA 02111-1307 USA
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'''
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ge - Generic Event Extension
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'''
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from Xlib.protocol import rq
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extname = 'Generic Event Extension'
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GenericEventCode = 35
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class GEQueryVersion(rq.ReplyRequest):
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_request = rq.Struct(
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rq.Card8('opcode'),
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rq.Opcode(0),
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rq.RequestLength(),
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rq.Card32('major_version'),
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rq.Card32('minor_version'),
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)
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_reply = rq.Struct(
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rq.ReplyCode(),
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rq.Pad(1),
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rq.Card16('sequence_number'),
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rq.ReplyLength(),
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rq.Card32('major_version'),
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rq.Card32('minor_version'),
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rq.Pad(16),
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)
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def query_version(self):
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return GEQueryVersion(
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display=self.display,
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opcode=self.display.get_extension_major(extname),
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major_version=1,
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minor_version=0,
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)
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class GenericEvent(rq.Event):
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_code = GenericEventCode
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_fields = rq.Struct(
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rq.Card8('type'),
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rq.Card8('extension'),
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rq.Card16('sequence_number'),
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rq.Card32('length'),
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rq.Card16('evtype'),
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# Some generic events make use of this space, but with
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# others the data is simply discarded. In any case we
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# don't need to explicitly pad this out as we are
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# always given at least 32 bytes and we save
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# everything after the first ten as the "data" field.
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#rq.Pad(22),
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)
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def __init__(self, binarydata = None, display = None, **keys):
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if binarydata:
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data = binarydata[10:]
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binarydata = binarydata[:10]
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else:
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data = ''
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rq.Event.__init__(
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self,
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binarydata=binarydata,
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display=display,
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**keys
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)
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if display:
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ge_event_data = getattr(display, 'ge_event_data', None)
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if ge_event_data:
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estruct = ge_event_data.get((self.extension, self.evtype), None)
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if estruct:
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data, _ = estruct.parse_binary(data, display)
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self._data['data'] = data
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def add_event_data(self, extension, evtype, estruct):
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if not hasattr(self.display, 'ge_event_data'):
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self.display.ge_event_data = {}
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self.display.ge_event_data[(extension, evtype)] = estruct
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def init(disp, info):
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disp.extension_add_method('display', 'ge_query_version', query_version)
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disp.extension_add_method('display', 'ge_add_event_data', add_event_data)
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disp.extension_add_event(GenericEventCode, GenericEvent)
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