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xinput.py
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654 lines (562 loc) · 16.7 KB
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# Xlib.ext.xinput -- XInput 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
'''
A very incomplete implementation of the XInput extension.
'''
import sys
import array
import struct
# Python 2/3 compatibility.
from six import integer_types
from Xlib.protocol import rq
from Xlib import X
extname = 'XInputExtension'
PropertyDeleted = 0
PropertyCreated = 1
PropertyModified = 2
NotifyNormal = 0
NotifyGrab = 1
NotifyUngrab = 2
NotifyWhileGrabbed = 3
NotifyPassiveGrab = 4
NotifyPassiveUngrab = 5
NotifyAncestor = 0
NotifyVirtual = 1
NotifyInferior = 2
NotifyNonlinear = 3
NotifyNonlinearVirtual = 4
NotifyPointer = 5
NotifyPointerRoot = 6
NotifyDetailNone = 7
GrabtypeButton = 0
GrabtypeKeycode = 1
GrabtypeEnter = 2
GrabtypeFocusIn = 3
GrabtypeTouchBegin = 4
AnyModifier = (1 << 31)
AnyButton = 0
AnyKeycode = 0
AsyncDevice = 0
SyncDevice = 1
ReplayDevice = 2
AsyncPairedDevice = 3
AsyncPair = 4
SyncPair = 5
SlaveSwitch = 1
DeviceChange = 2
MasterAdded = (1 << 0)
MasterRemoved = (1 << 1)
SlaveAdded = (1 << 2)
SlaveRemoved = (1 << 3)
SlaveAttached = (1 << 4)
SlaveDetached = (1 << 5)
DeviceEnabled = (1 << 6)
DeviceDisabled = (1 << 7)
AddMaster = 1
RemoveMaster = 2
AttachSlave = 3
DetachSlave = 4
AttachToMaster = 1
Floating = 2
ModeRelative = 0
ModeAbsolute = 1
MasterPointer = 1
MasterKeyboard = 2
SlavePointer = 3
SlaveKeyboard = 4
FloatingSlave = 5
KeyClass = 0
ButtonClass = 1
ValuatorClass = 2
ScrollClass = 3
TouchClass = 8
KeyRepeat = (1 << 16)
AllDevices = 0
AllMasterDevices = 1
DeviceChanged = 1
KeyPress = 2
KeyRelease = 3
ButtonPress = 4
ButtonRelease = 5
Motion = 6
Enter = 7
Leave = 8
FocusIn = 9
FocusOut = 10
HierarchyChanged = 11
PropertyEvent = 12
RawKeyPress = 13
RawKeyRelease = 14
RawButtonPress = 15
RawButtonRelease = 16
RawMotion = 17
DeviceChangedMask = (1 << DeviceChanged)
KeyPressMask = (1 << KeyPress)
KeyReleaseMask = (1 << KeyRelease)
ButtonPressMask = (1 << ButtonPress)
ButtonReleaseMask = (1 << ButtonRelease)
MotionMask = (1 << Motion)
EnterMask = (1 << Enter)
LeaveMask = (1 << Leave)
FocusInMask = (1 << FocusIn)
FocusOutMask = (1 << FocusOut)
HierarchyChangedMask = (1 << HierarchyChanged)
PropertyEventMask = (1 << PropertyEvent)
RawKeyPressMask = (1 << RawKeyPress)
RawKeyReleaseMask = (1 << RawKeyRelease)
RawButtonPressMask = (1 << RawButtonPress)
RawButtonReleaseMask = (1 << RawButtonRelease)
RawMotionMask = (1 << RawMotion)
GrabModeSync = 0
GrabModeAsync = 1
GrabModeTouch = 2
DEVICEID = rq.Card16
DEVICE = rq.Card16
DEVICEUSE = rq.Card8
class FP1616(rq.Int32):
def check_value(self, value):
return int(value * 65536.0)
def parse_value(self, value, display):
return float(value) / float(1 << 16)
class FP3232(rq.ValueField):
structcode = 'lL'
structvalues = 2
def check_value(self, value):
return value
def parse_value(self, value, display):
integral, frac = value
ret = float(integral)
# optimised math.ldexp(float(frac), -32)
ret += float(frac) * (1.0 / (1 << 32))
return ret
class XIQueryVersion(rq.ReplyRequest):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(47),
rq.RequestLength(),
rq.Card16('major_version'),
rq.Card16('minor_version'),
)
_reply = rq.Struct(
rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
rq.Card16('major_version'),
rq.Card16('minor_version'),
rq.Pad(20),
)
def query_version(self):
return XIQueryVersion(
display=self.display,
opcode=self.display.get_extension_major(extname),
major_version=2,
minor_version=0,
)
class Mask(rq.List):
def __init__(self, name):
rq.List.__init__(self, name, rq.Card32, pad=0)
def pack_value(self, val):
mask_seq = array.array(rq.struct_to_array_codes['L'])
if isinstance(val, integer_types):
# We need to build a "binary mask" that (as far as I can tell) is
# encoded in native byte order from end to end. The simple case is
# with a single unsigned 32-bit value, for which we construct an
# array with just one item. For values too big to fit inside 4
# bytes we build a longer array, being careful to maintain native
# byte order across the entire set of values.
if sys.byteorder == 'little':
def fun(val):
mask_seq.insert(0, val)
elif sys.byteorder == 'big':
fun = mask_seq.append
else:
raise AssertionError(sys.byteorder)
while val:
fun(val & 0xFFFFFFFF)
val = val >> 32
else:
mask_seq.extend(val)
return mask_seq.tostring(), len(mask_seq), None
EventMask = rq.Struct(
DEVICE('deviceid'),
rq.LengthOf('mask', 2),
Mask('mask'),
)
class XISelectEvents(rq.Request):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(46),
rq.RequestLength(),
rq.Window('window'),
rq.LengthOf('masks', 2),
rq.Pad(2),
rq.List('masks', EventMask),
)
def select_events(self, event_masks):
'''
select_events(event_masks)
event_masks:
Sequence of (deviceid, mask) pairs, where deviceid is a numerical device
ID, or AllDevices or AllMasterDevices, and mask is either an unsigned
integer or sequence of 32 bits unsigned values
'''
return XISelectEvents(
display=self.display,
opcode=self.display.get_extension_major(extname),
window=self,
masks=event_masks,
)
AnyInfo = rq.Struct(
rq.Card16('type'),
rq.Card16('length'),
rq.Card16('sourceid'),
rq.Pad(2),
)
class ButtonMask(object):
def __init__(self, value, length):
self._value = value
self._length = length
def __len__(self):
return self._length
def __getitem__(self, key):
return self._value & (1 << key)
def __str__(self):
return repr(self)
def __repr__(self):
return '0b{value:0{width}b}'.format(value=self._value,
width=self._length)
class ButtonState(rq.ValueField):
structcode = None
def __init__(self, name):
rq.ValueField.__init__(self, name)
def parse_binary_value(self, data, display, length, fmt):
# Mask: bitfield of <length> button states.
mask_len = 4 * ((((length + 7) >> 3) + 3) >> 2)
mask_data = data[:mask_len]
mask_value = 0
for byte in reversed(struct.unpack('={0:d}B'.format(mask_len), mask_data)):
mask_value <<= 8
mask_value |= byte
data = data[mask_len:]
assert (mask_value & 1) == 0
return ButtonMask(mask_value >> 1, length), data
ButtonInfo = rq.Struct(
rq.Card16('type'),
rq.Card16('length'),
rq.Card16('sourceid'),
rq.LengthOf(('state', 'labels'), 2),
ButtonState('state'),
rq.List('labels', rq.Card32),
)
KeyInfo = rq.Struct(
rq.Card16('type'),
rq.Card16('length'),
rq.Card16('sourceid'),
rq.LengthOf('keycodes', 2),
rq.List('keycodes', rq.Card32),
)
ValuatorInfo = rq.Struct(
rq.Card16('type'),
rq.Card16('length'),
rq.Card16('sourceid'),
rq.Card16('number'),
rq.Card32('label'),
FP3232('min'),
FP3232('max'),
FP3232('value'),
rq.Card32('resolution'),
rq.Card8('mode'),
rq.Pad(3),
)
ScrollInfo = rq.Struct(
rq.Card16('type'),
rq.Card16('length'),
rq.Card16('sourceid'),
rq.Card16('number'),
rq.Card16('scroll_type'),
rq.Pad(2),
rq.Card32('flags'),
FP3232('increment'),
)
TouchInfo = rq.Struct(
rq.Card16('type'),
rq.Card16('length'),
rq.Card16('sourceid'),
rq.Card8('mode'),
rq.Card8('num_touches'),
)
INFO_CLASSES = {
KeyClass: KeyInfo,
ButtonClass: ButtonInfo,
ValuatorClass: ValuatorInfo,
ScrollClass: ScrollInfo,
TouchClass: TouchInfo,
}
class ClassInfoClass(object):
structcode = None
def parse_binary(self, data, display):
class_type, length = struct.unpack('=HH', data[:4])
class_struct = INFO_CLASSES.get(class_type, AnyInfo)
class_data, _ = class_struct.parse_binary(data, display)
data = data[length * 4:]
return class_data, data
ClassInfo = ClassInfoClass()
DeviceInfo = rq.Struct(
DEVICEID('deviceid'),
rq.Card16('use'),
rq.Card16('attachment'),
rq.LengthOf('classes', 2),
rq.LengthOf('name', 2),
rq.Bool('enabled'),
rq.Pad(1),
rq.String8('name', 4),
rq.List('classes', ClassInfo),
)
class XIQueryDevice(rq.ReplyRequest):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(48),
rq.RequestLength(),
DEVICEID('deviceid'),
rq.Pad(2),
)
_reply = rq.Struct(
rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
rq.LengthOf('devices', 2),
rq.Pad(22),
rq.List('devices', DeviceInfo),
)
def query_device(self, deviceid):
return XIQueryDevice(
display=self.display,
opcode=self.display.get_extension_major(extname),
deviceid=deviceid,
)
class XIGrabDevice(rq.ReplyRequest):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(51),
rq.RequestLength(),
rq.Window('grab_window'),
rq.Card32('time'),
rq.Cursor('cursor', (X.NONE, )),
DEVICEID('deviceid'),
rq.Set('grab_mode', 1, (GrabModeSync, GrabModeAsync)),
rq.Set('paired_device_mode', 1, (GrabModeSync, GrabModeAsync)),
rq.Bool('owner_events'),
rq.Pad(1),
rq.LengthOf('mask', 2),
Mask('mask'),
)
_reply = rq.Struct(
rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
rq.Card8('status'),
rq.Pad(23),
)
def grab_device(self, deviceid, time, grab_mode, paired_device_mode, owner_events, event_mask):
return XIGrabDevice(
display=self.display,
opcode=self.display.get_extension_major(extname),
deviceid=deviceid,
grab_window=self,
time=time,
cursor=X.NONE,
grab_mode=grab_mode,
paired_device_mode=paired_device_mode,
owner_events=owner_events,
mask=event_mask,
)
class XIUngrabDevice(rq.Request):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(52),
rq.RequestLength(),
rq.Card32('time'),
DEVICEID('deviceid'),
rq.Pad(2),
)
def ungrab_device(self, deviceid, time):
return XIUngrabDevice(
display=self.display,
opcode=self.display.get_extension_major(extname),
time=time,
deviceid=deviceid,
)
class XIPassiveGrabDevice(rq.ReplyRequest):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(54),
rq.RequestLength(),
rq.Card32('time'),
rq.Window('grab_window'),
rq.Cursor('cursor', (X.NONE, )),
rq.Card32('detail'),
DEVICEID('deviceid'),
rq.LengthOf('modifiers', 2),
rq.LengthOf('mask', 2),
rq.Set('grab_type', 1, (GrabtypeButton, GrabtypeKeycode, GrabtypeEnter,
GrabtypeFocusIn, GrabtypeTouchBegin)),
rq.Set('grab_mode', 1, (GrabModeSync, GrabModeAsync)),
rq.Set('paired_device_mode', 1, (GrabModeSync, GrabModeAsync)),
rq.Bool('owner_events'),
rq.Pad(2),
Mask('mask'),
rq.List('modifiers', rq.Card32),
)
_reply = rq.Struct(
rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
rq.LengthOf('modifiers', 2),
rq.Pad(22),
rq.List('modifiers', rq.Card32),
)
def passive_grab_device(self, deviceid, time, detail,
grab_type, grab_mode, paired_device_mode,
owner_events, event_mask, modifiers):
return XIPassiveGrabDevice(
display=self.display,
opcode=self.display.get_extension_major(extname),
deviceid=deviceid,
grab_window=self,
time=time,
cursor=X.NONE,
detail=detail,
grab_type=grab_type,
grab_mode=grab_mode,
paired_device_mode=paired_device_mode,
owner_events=owner_events,
mask=event_mask,
modifiers=modifiers,
)
def grab_keycode(self, deviceid, time, keycode,
grab_mode, paired_device_mode,
owner_events, event_mask, modifiers):
return passive_grab_device(self, deviceid, time, keycode,
GrabtypeKeycode,
grab_mode, paired_device_mode,
owner_events, event_mask, modifiers)
class XIPassiveUngrabDevice(rq.Request):
_request = rq.Struct(
rq.Card8('opcode'),
rq.Opcode(55),
rq.RequestLength(),
rq.Window('grab_window'),
rq.Card32('detail'),
DEVICEID('deviceid'),
rq.LengthOf('modifiers', 2),
rq.Set('grab_type', 1, (GrabtypeButton, GrabtypeKeycode,
GrabtypeEnter, GrabtypeFocusIn,
GrabtypeTouchBegin)),
rq.Pad(3),
rq.List('modifiers', rq.Card32),
)
def passive_ungrab_device(self, deviceid, detail, grab_type, modifiers):
return XIPassiveUngrabDevice(
display=self.display,
opcode=self.display.get_extension_major(extname),
deviceid=deviceid,
grab_window=self,
detail=detail,
grab_type=grab_type,
modifiers=modifiers,
)
def ungrab_keycode(self, deviceid, keycode, modifiers):
return passive_ungrab_device(self, deviceid, keycode,
GrabtypeKeycode, modifiers)
HierarchyInfo = rq.Struct(
DEVICEID('deviceid'),
DEVICEID('attachment'),
DEVICEUSE('type'),
rq.Bool('enabled'),
rq.Pad(2),
rq.Card32('flags'),
)
HierarchyEventData = rq.Struct(
DEVICEID('deviceid'),
rq.Card32('time'),
rq.Card32('flags'),
rq.LengthOf('info', 2),
rq.Pad(10),
rq.List('info', HierarchyInfo),
)
ModifierInfo = rq.Struct(
rq.Card
6770
32('base_mods'),
rq.Card32('latched_mods'),
rq.Card32('locked_mods'),
rq.Card32('effective_mods'),
)
GroupInfo = rq.Struct(
rq.Card8('base_group'),
rq.Card8('latched_group'),
rq.Card8('locked_group'),
rq.Card8('effective_group'),
)
DeviceEventData = rq.Struct(
DEVICEID('deviceid'),
rq.Card32('time'),
rq.Card32('detail'),
rq.Window('root'),
rq.Window('event'),
rq.Window('child'),
FP1616('root_x'),
FP1616('root_y'),
FP1616('event_x'),
FP1616('event_y'),
rq.LengthOf('buttons', 2),
rq.Card16('valulators_len'),
DEVICEID('sourceid'),
rq.Pad(2),
rq.Card32('flags'),
rq.Object('mods', ModifierInfo),
rq.Object('groups', GroupInfo),
ButtonState('buttons'),
)
DeviceChangedEventData = rq.Struct(
DEVICEID('deviceid'),
rq.Card32('time'),
rq.LengthOf('classes', 2),
DEVICEID('sourceid'),
rq.Card8('reason'),
rq.Pad(11),
rq.List('classes', ClassInfo),
)
def init(disp, info):
disp.extension_add_method('display', 'xinput_query_version', query_version)
disp.extension_add_method('window', 'xinput_select_events', select_events)
disp.extension_add_method('display', 'xinput_query_device', query_device)
disp.extension_add_method('window', 'xinput_grab_device', grab_device)
disp.extension_add_method('display', 'xinput_ungrab_device', ungrab_device)
disp.extension_add_method('window', 'xinput_grab_keycode', grab_keycode)
disp.extension_add_method('window', 'xinput_ungrab_keycode', ungrab_keycode)
for device_event in (ButtonPress, ButtonRelease, KeyPress, KeyRelease, Motion):
disp.ge_add_event_data(info.major_opcode, device_event, DeviceEventData)
disp.ge_add_event_data(info.major_opcode, DeviceChanged, DeviceEventData)
disp.ge_add_event_data(info.major_opcode, HierarchyChanged, HierarchyEventData)