/usr/lib/python3/dist-packages/ipykernel/_eventloop_macos.py is in python3-ipykernel 4.8.2-2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | """Eventloop hook for OS X
Calls NSApp / CoreFoundation APIs via ctypes.
"""
# cribbed heavily from IPython.terminal.pt_inputhooks.osx
# obj-c boilerplate from appnope, used under BSD 2-clause
import ctypes
import ctypes.util
from threading import Event
objc = ctypes.cdll.LoadLibrary(ctypes.util.find_library('objc'))
void_p = ctypes.c_void_p
objc.objc_getClass.restype = void_p
objc.sel_registerName.restype = void_p
objc.objc_msgSend.restype = void_p
objc.objc_msgSend.argtypes = [void_p, void_p]
msg = objc.objc_msgSend
def _utf8(s):
"""ensure utf8 bytes"""
if not isinstance(s, bytes):
s = s.encode('utf8')
return s
def n(name):
"""create a selector name (for ObjC methods)"""
return objc.sel_registerName(_utf8(name))
def C(classname):
"""get an ObjC Class by name"""
return objc.objc_getClass(_utf8(classname))
# end obj-c boilerplate from appnope
# CoreFoundation C-API calls we will use:
CoreFoundation = ctypes.cdll.LoadLibrary(ctypes.util.find_library('CoreFoundation'))
CFAbsoluteTimeGetCurrent = CoreFoundation.CFAbsoluteTimeGetCurrent
CFAbsoluteTimeGetCurrent.restype = ctypes.c_double
CFRunLoopGetCurrent = CoreFoundation.CFRunLoopGetCurrent
CFRunLoopGetCurrent.restype = void_p
CFRunLoopGetMain = CoreFoundation.CFRunLoopGetMain
CFRunLoopGetMain.restype = void_p
CFRunLoopStop = CoreFoundation.CFRunLoopStop
CFRunLoopStop.restype = None
CFRunLoopStop.argtypes = [void_p]
CFRunLoopTimerCreate = CoreFoundation.CFRunLoopTimerCreate
CFRunLoopTimerCreate.restype = void_p
CFRunLoopTimerCreate.argtypes = [
void_p, # allocator (NULL)
ctypes.c_double, # fireDate
ctypes.c_double, # interval
ctypes.c_int, # flags (0)
ctypes.c_int, # order (0)
void_p, # callout
void_p, # context
]
CFRunLoopAddTimer = CoreFoundation.CFRunLoopAddTimer
CFRunLoopAddTimer.restype = None
CFRunLoopAddTimer.argtypes = [ void_p, void_p, void_p ]
kCFRunLoopCommonModes = void_p.in_dll(CoreFoundation, 'kCFRunLoopCommonModes')
def _NSApp():
"""Return the global NSApplication instance (NSApp)"""
return msg(C('NSApplication'), n('sharedApplication'))
def _wake(NSApp):
"""Wake the Application"""
event = msg(C('NSEvent'),
n('otherEventWithType:location:modifierFlags:'
'timestamp:windowNumber:context:subtype:data1:data2:'),
15, # Type
0, # location
0, # flags
0, # timestamp
0, # window
None, # context
0, # subtype
0, # data1
0, # data2
)
msg(NSApp, n('postEvent:atStart:'), void_p(event), True)
_triggered = Event()
def stop(timer=None, loop=None):
"""Callback to fire when there's input to be read"""
_triggered.set()
NSApp = _NSApp()
# if NSApp is not running, stop CFRunLoop directly,
# otherwise stop and wake NSApp
if msg(NSApp, n('isRunning')):
msg(NSApp, n('stop:'), NSApp)
_wake(NSApp)
else:
CFRunLoopStop(CFRunLoopGetCurrent())
_c_callback_func_type = ctypes.CFUNCTYPE(None, void_p, void_p)
_c_stop_callback = _c_callback_func_type(stop)
def _stop_after(delay):
"""Register callback to stop eventloop after a delay"""
timer = CFRunLoopTimerCreate(
None, # allocator
CFAbsoluteTimeGetCurrent() + delay, # fireDate
0, # interval
0, # flags
0, # order
_c_stop_callback,
None,
)
CFRunLoopAddTimer(
CFRunLoopGetMain(),
timer,
kCFRunLoopCommonModes,
)
def mainloop(duration=1):
"""run the Cocoa eventloop for the specified duration (seconds)"""
_triggered.clear()
NSApp = _NSApp()
_stop_after(duration)
msg(NSApp, n('run'))
if not _triggered.is_set():
# app closed without firing callback,
# probably due to last window being closed.
# Run the loop manually in this case,
# since there may be events still to process (ipython/ipython#9734)
CoreFoundation.CFRunLoopRun()
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