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ge.py
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112 lines (93 loc) · 3.29 KB
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# Xlib.ext.ge -- Generic Event extension module
#
# Copyright (C) 2012 Outpost Embedded, LLC
# Forest Bond <forest.bond@rapidrollout.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 2.1
# of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc.,
# 59 Temple Place,
# Suite 330,
# Boston, MA 02111-1307 USA
'''
ge - Generic Event Extension
'''
from Xlib.protocol import rq
extname = 'Generic Event Extension'
GenericEventCode = 35
class GEQueryVersion(rq.ReplyRequest):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(0),
rq.RequestLength(),
rq.Card32('major_version'),
rq.Card32('minor_version'),
)
_reply = rq.Struct(
rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
rq.Card32('major_version'),
rq.Card32('minor_version'),
rq.Pad(16),
)
def query_version(self):
return GEQueryVersion(
display=self.display,
opcode=self.display.get_extension_major(extname),
major_version=1,
minor_version=0,
)
class GenericEvent(rq.Event):
_code = GenericEventCode
_fields = rq.Struct(
rq.Card8('type'),
rq.Card8('extension'),
rq.Card16('sequence_number'),
rq.Card32('length'),
rq.Card16('evtype'),
# Some generic events make use of this space, but with
# others the data is simply discarded. In any case we
# don't need to explicitly pad this out as we are
# always given at least 32 bytes and we save
# everything after the first ten as the "data" field.
#rq.Pad(22),
)
def __init__(self, binarydata = None, display = None, **keys):
if binarydata:
data = binarydata[10:]
binarydata = binarydata[:10]
else:
data = ''
rq.Event.__init__(
self,
binarydata=binarydata,
display=display,
**keys
)
if display:
ge_event_data = getattr(display, 'ge_event_data', None)
if ge_event_data:
estruct = ge_event_data.get((self.extension, self.evtype), None)
if estruct:
data, _ = estruct.parse_binary(data, display)
self._data['data'] = data
def add_event_data(self, extension, evtype, estruct):
if not hasattr(self.display, 'ge_event_data'):
self.display.ge_event_data = {}
self.display.ge_event_data[(extension, evtype)] = estruct
def init(disp, info):
disp.extension_add_method('display', 'ge_query_version', query_version)
disp.extension_add_method('display', 'ge_add_event_data', add_event_data)
disp.extension_add_event(GenericEventCode, GenericEvent)