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hotkey: Re-factor into a module, per-arch files

This helps avoid some pre-commit/mypy carping.
This commit is contained in:
Athanasius 2022-12-22 13:21:14 +00:00
parent d40bb4f09c
commit f7cba59e61
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5 changed files with 721 additions and 703 deletions

703
hotkey.py
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"""Handle keyboard input for manual update triggering."""
# -*- coding: utf-8 -*-
import abc
import pathlib
import sys
import tkinter as tk
from abc import abstractmethod
from typing import Optional, Tuple, Union
from config import config
from EDMCLogging import get_main_logger
logger = get_main_logger()
class AbstractHotkeyMgr(abc.ABC):
"""Abstract root class of all platforms specific HotKeyMgr."""
@abstractmethod
def register(self, root, keycode, modifiers) -> None:
"""Register the hotkey handler."""
pass
@abstractmethod
def unregister(self) -> None:
"""Unregister the hotkey handling."""
pass
@abstractmethod
def play_good(self) -> None:
"""Play the 'good' sound."""
pass
@abstractmethod
def play_bad(self) -> None:
"""Play the 'bad' sound."""
pass
if sys.platform == 'darwin':
import objc
from AppKit import (
NSAlternateKeyMask, NSApplication, NSBeep, NSClearLineFunctionKey, NSCommandKeyMask, NSControlKeyMask,
NSDeleteFunctionKey, NSDeviceIndependentModifierFlagsMask, NSEvent, NSF1FunctionKey, NSF35FunctionKey,
NSFlagsChanged, NSKeyDown, NSKeyDownMask, NSKeyUp, NSNumericPadKeyMask, NSShiftKeyMask, NSSound, NSWorkspace
)
class MacHotkeyMgr(AbstractHotkeyMgr):
"""Hot key management."""
POLL = 250
# https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSEvent_Class/#//apple_ref/doc/constant_group/Function_Key_Unicodes
DISPLAY = {
0x03: u'', 0x09: u'', 0xd: u'', 0x19: u'', 0x1b: u'esc', 0x20: u'', 0x7f: u'',
0xf700: u'', 0xf701: u'', 0xf702: u'', 0xf703: u'',
0xf727: u'Ins',
0xf728: u'', 0xf729: u'', 0xf72a: u'Fn', 0xf72b: u'',
0xf72c: u'', 0xf72d: u'', 0xf72e: u'PrtScr', 0xf72f: u'ScrollLock',
0xf730: u'Pause', 0xf731: u'SysReq', 0xf732: u'Break', 0xf733: u'Reset',
0xf739: u'',
}
(ACQUIRE_INACTIVE, ACQUIRE_ACTIVE, ACQUIRE_NEW) = range(3)
def __init__(self):
self.MODIFIERMASK = NSShiftKeyMask | NSControlKeyMask | NSAlternateKeyMask | NSCommandKeyMask \
| NSNumericPadKeyMask
self.root = None
self.keycode = 0
self.modifiers = 0
self.activated = False
self.observer = None
self.acquire_key = 0
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
self.tkProcessKeyEvent_old = None
self.snd_good = NSSound.alloc().initWithContentsOfFile_byReference_(
pathlib.Path(config.respath_path) / 'snd_good.wav', False
)
self.snd_bad = NSSound.alloc().initWithContentsOfFile_byReference_(
pathlib.Path(config.respath_path) / 'snd_bad.wav', False
)
def register(self, root: tk.Tk, keycode, modifiers) -> None:
"""
Register current hotkey for monitoring.
:param root: parent window.
:param keycode: Key to monitor.
:param modifiers: Any modifiers to take into account.
"""
self.root = root
self.keycode = keycode
self.modifiers = modifiers
self.activated = False
if keycode:
if not self.observer:
self.root.after_idle(self._observe)
self.root.after(MacHotkeyMgr.POLL, self._poll)
# Monkey-patch tk (tkMacOSXKeyEvent.c)
if not self.tkProcessKeyEvent_old:
sel = b'tkProcessKeyEvent:'
cls = NSApplication.sharedApplication().class__() # type: ignore
self.tkProcessKeyEvent_old = NSApplication.sharedApplication().methodForSelector_(sel) # type: ignore
newmethod = objc.selector( # type: ignore
self.tkProcessKeyEvent,
selector=self.tkProcessKeyEvent_old.selector,
signature=self.tkProcessKeyEvent_old.signature
)
objc.classAddMethod(cls, sel, newmethod) # type: ignore
def tkProcessKeyEvent(self, cls, the_event): # noqa: N802
"""
Monkey-patch tk (tkMacOSXKeyEvent.c).
- workaround crash on OSX 10.9 & 10.10 on seeing a composing character
- notice when modifier key state changes
- keep a copy of NSEvent.charactersIgnoringModifiers, which is what we need for the hotkey
(Would like to use a decorator but need to ensure the application is created before this is installed)
:param cls: ???
:param the_event: tk event
:return: ???
"""
if self.acquire_state:
if the_event.type() == NSFlagsChanged:
self.acquire_key = the_event.modifierFlags() & NSDeviceIndependentModifierFlagsMask
self.acquire_state = MacHotkeyMgr.ACQUIRE_NEW
# suppress the event by not chaining the old function
return the_event
elif the_event.type() in (NSKeyDown, NSKeyUp):
c = the_event.charactersIgnoringModifiers()
self.acquire_key = (c and ord(c[0]) or 0) | \
(the_event.modifierFlags() & NSDeviceIndependentModifierFlagsMask)
self.acquire_state = MacHotkeyMgr.ACQUIRE_NEW
# suppress the event by not chaining the old function
return the_event
# replace empty characters with charactersIgnoringModifiers to avoid crash
elif the_event.type() in (NSKeyDown, NSKeyUp) and not the_event.characters():
the_event = NSEvent.keyEventWithType_location_modifierFlags_timestamp_windowNumber_context_characters_charactersIgnoringModifiers_isARepeat_keyCode_( # noqa: E501
# noqa: E501
the_event.type(),
the_event.locationInWindow(),
the_event.modifierFlags(),
the_event.timestamp(),
the_event.windowNumber(),
the_event.context(),
the_event.charactersIgnoringModifiers(),
the_event.charactersIgnoringModifiers(),
the_event.isARepeat(),
the_event.keyCode()
)
return self.tkProcessKeyEvent_old(cls, the_event)
def _observe(self):
# Must be called after root.mainloop() so that the app's message loop has been created
self.observer = NSEvent.addGlobalMonitorForEventsMatchingMask_handler_(NSKeyDownMask, self._handler)
def _poll(self):
if config.shutting_down:
return
# No way of signalling to Tkinter from within the callback handler block that doesn't
# cause Python to crash, so poll.
if self.activated:
self.activated = False
self.root.event_generate('<<Invoke>>', when="tail")
if self.keycode or self.modifiers:
self.root.after(MacHotkeyMgr.POLL, self._poll)
def unregister(self) -> None:
"""Remove hotkey registration."""
self.keycode = None
self.modifiers = None
if sys.platform == 'darwin': # noqa: C901
@objc.callbackFor(NSEvent.addGlobalMonitorForEventsMatchingMask_handler_)
def _handler(self, event) -> None:
# use event.charactersIgnoringModifiers to handle composing characters like Alt-e
if ((event.modifierFlags() & self.MODIFIERMASK) == self.modifiers
and ord(event.charactersIgnoringModifiers()[0]) == self.keycode):
if config.get_int('hotkey_always'):
self.activated = True
else: # Only trigger if game client is front process
front = NSWorkspace.sharedWorkspace().frontmostApplication()
if front and front.bundleIdentifier() == 'uk.co.frontier.EliteDangerous':
self.activated = True
def acquire_start(self) -> None:
"""Start acquiring hotkey state via polling."""
self.acquire_state = MacHotkeyMgr.ACQUIRE_ACTIVE
self.root.after_idle(self._acquire_poll)
def acquire_stop(self) -> None:
"""Stop acquiring hotkey state."""
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
def _acquire_poll(self) -> None:
"""Perform a poll of current hotkey state."""
if config.shutting_down:
return
# No way of signalling to Tkinter from within the monkey-patched event handler that doesn't
# cause Python to crash, so poll.
if self.acquire_state:
if self.acquire_state == MacHotkeyMgr.ACQUIRE_NEW:
# Abuse tkEvent's keycode field to hold our acquired key & modifier
self.root.event_generate('<KeyPress>', keycode=self.acquire_key)
self.acquire_state = MacHotkeyMgr.ACQUIRE_ACTIVE
self.root.after(50, self._acquire_poll)
def fromevent(self, event) -> Optional[Union[bool, Tuple]]:
"""
Return configuration (keycode, modifiers) or None=clear or False=retain previous.
:param event: tk event ?
:return: False to retain previous, None to not use, else (keycode, modifiers)
"""
(keycode, modifiers) = (event.keycode & 0xffff, event.keycode & 0xffff0000) # Set by _acquire_poll()
if (keycode
and not (modifiers & (NSShiftKeyMask | NSControlKeyMask | NSAlternateKeyMask | NSCommandKeyMask))):
if keycode == 0x1b: # Esc = retain previous
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
return False
# BkSp, Del, Clear = clear hotkey
elif keycode in [0x7f, ord(NSDeleteFunctionKey), ord(NSClearLineFunctionKey)]:
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
return None
# don't allow keys needed for typing in System Map
elif keycode in [0x13, 0x20, 0x2d] or 0x61 <= keycode <= 0x7a:
NSBeep()
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
return None
return (keycode, modifiers)
def display(self, keycode, modifiers) -> str:
"""
Return displayable form of given hotkey + modifiers.
:param keycode:
:param modifiers:
:return: string form
"""
text = ''
if modifiers & NSControlKeyMask:
text += u''
if modifiers & NSAlternateKeyMask:
text += u''
if modifiers & NSShiftKeyMask:
text += u''
if modifiers & NSCommandKeyMask:
text += u''
if (modifiers & NSNumericPadKeyMask) and keycode <= 0x7f:
text += u''
if not keycode:
pass
elif ord(NSF1FunctionKey) <= keycode <= ord(NSF35FunctionKey):
text += f'F{keycode + 1 - ord(NSF1FunctionKey)}'
elif keycode in MacHotkeyMgr.DISPLAY: # specials
text += MacHotkeyMgr.DISPLAY[keycode]
elif keycode < 0x20: # control keys
text += chr(keycode + 0x40)
elif keycode < 0xf700: # key char
text += chr(keycode).upper()
else:
text += u''
return text
def play_good(self):
"""Play the 'good' sound."""
self.snd_good.play()
def play_bad(self):
"""Play the 'bad' sound."""
self.snd_bad.play()
if sys.platform == 'win32':
import atexit
import ctypes
import threading
import winsound
from ctypes.wintypes import DWORD, HWND, LONG, LPWSTR, MSG, ULONG, WORD
RegisterHotKey = ctypes.windll.user32.RegisterHotKey
UnregisterHotKey = ctypes.windll.user32.UnregisterHotKey
MOD_ALT = 0x0001
MOD_CONTROL = 0x0002
MOD_SHIFT = 0x0004
MOD_WIN = 0x0008
MOD_NOREPEAT = 0x4000
GetMessage = ctypes.windll.user32.GetMessageW
TranslateMessage = ctypes.windll.user32.TranslateMessage
DispatchMessage = ctypes.windll.user32.DispatchMessageW
PostThreadMessage = ctypes.windll.user32.PostThreadMessageW
WM_QUIT = 0x0012
WM_HOTKEY = 0x0312
WM_APP = 0x8000
WM_SND_GOOD = WM_APP + 1
WM_SND_BAD = WM_APP + 2
GetKeyState = ctypes.windll.user32.GetKeyState
MapVirtualKey = ctypes.windll.user32.MapVirtualKeyW
VK_BACK = 0x08
VK_CLEAR = 0x0c
VK_RETURN = 0x0d
VK_SHIFT = 0x10
VK_CONTROL = 0x11
VK_MENU = 0x12
VK_CAPITAL = 0x14
VK_MODECHANGE = 0x1f
VK_ESCAPE = 0x1b
VK_SPACE = 0x20
VK_DELETE = 0x2e
VK_LWIN = 0x5b
VK_RWIN = 0x5c
VK_NUMPAD0 = 0x60
VK_DIVIDE = 0x6f
VK_F1 = 0x70
VK_F24 = 0x87
VK_OEM_MINUS = 0xbd
VK_NUMLOCK = 0x90
VK_SCROLL = 0x91
VK_PROCESSKEY = 0xe5
VK_OEM_CLEAR = 0xfe
GetForegroundWindow = ctypes.windll.user32.GetForegroundWindow
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowText.argtypes = [HWND, LPWSTR, ctypes.c_int]
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
def window_title(h) -> str:
"""
Determine the title for a window.
:param h: Window handle.
:return: Window title.
"""
if h:
title_length = GetWindowTextLength(h) + 1
buf = ctypes.create_unicode_buffer(title_length)
if GetWindowText(h, buf, title_length):
return buf.value
return ''
class MOUSEINPUT(ctypes.Structure):
"""Mouse Input structure."""
_fields_ = [
('dx', LONG),
('dy', LONG),
('mouseData', DWORD),
('dwFlags', DWORD),
('time', DWORD),
('dwExtraInfo', ctypes.POINTER(ULONG))
]
class KEYBDINPUT(ctypes.Structure):
"""Keyboard Input structure."""
_fields_ = [
('wVk', WORD),
('wScan', WORD),
('dwFlags', DWORD),
('time', DWORD),
('dwExtraInfo', ctypes.POINTER(ULONG))
]
class HARDWAREINPUT(ctypes.Structure):
"""Hardware Input structure."""
_fields_ = [
('uMsg', DWORD),
('wParamL', WORD),
('wParamH', WORD)
]
class INPUTUNION(ctypes.Union):
"""Input union."""
_fields_ = [
('mi', MOUSEINPUT),
('ki', KEYBDINPUT),
('hi', HARDWAREINPUT)
]
class INPUT(ctypes.Structure):
"""Input structure."""
_fields_ = [
('type', DWORD),
('union', INPUTUNION)
]
SendInput = ctypes.windll.user32.SendInput
SendInput.argtypes = [ctypes.c_uint, ctypes.POINTER(INPUT), ctypes.c_int]
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
class WindowsHotkeyMgr(AbstractHotkeyMgr):
"""Hot key management."""
# https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731%28v=vs.85%29.aspx
# Limit ourselves to symbols in Windows 7 Segoe UI
DISPLAY = {
0x03: 'Break', 0x08: 'Bksp', 0x09: u'', 0x0c: 'Clear', 0x0d: u'', 0x13: 'Pause',
0x14: u'', 0x1b: 'Esc',
0x20: u'', 0x21: 'PgUp', 0x22: 'PgDn', 0x23: 'End', 0x24: 'Home',
0x25: u'', 0x26: u'', 0x27: u'', 0x28: u'',
0x2c: 'PrtScn', 0x2d: 'Ins', 0x2e: 'Del', 0x2f: 'Help',
0x5d: u'', 0x5f: u'',
0x90: u'', 0x91: 'ScrLk',
0xa6: u'', 0xa7: u'', 0xa9: u'', 0xab: u'', 0xac: u'', 0xb4: u'',
}
def __init__(self) -> None:
self.root: tk.Tk = None # type: ignore
self.thread: threading.Thread = None # type: ignore
with open(pathlib.Path(config.respath) / 'snd_good.wav', 'rb') as sg:
self.snd_good = sg.read()
with open(pathlib.Path(config.respath) / 'snd_bad.wav', 'rb') as sb:
self.snd_bad = sb.read()
atexit.register(self.unregister)
def register(self, root: tk.Tk, keycode, modifiers) -> None:
"""Register the hotkey handler."""
self.root = root
if self.thread:
logger.debug('Was already registered, unregistering...')
self.unregister()
if keycode or modifiers:
logger.debug('Creating thread worker...')
self.thread = threading.Thread(
target=self.worker,
name=f'Hotkey "{keycode}:{modifiers}"',
args=(keycode, modifiers)
)
self.thread.daemon = True
logger.debug('Starting thread worker...')
self.thread.start()
logger.debug('Done.')
def unregister(self) -> None:
"""Unregister the hotkey handling."""
thread = self.thread
if thread:
logger.debug('Thread is/was running')
self.thread = None # type: ignore
logger.debug('Telling thread WM_QUIT')
PostThreadMessage(thread.ident, WM_QUIT, 0, 0)
logger.debug('Joining thread')
thread.join() # Wait for it to unregister hotkey and quit
else:
logger.debug('No thread')
logger.debug('Done.')
def worker(self, keycode, modifiers) -> None: # noqa: CCR001
"""Handle hotkeys."""
logger.debug('Begin...')
# Hotkey must be registered by the thread that handles it
if not RegisterHotKey(None, 1, modifiers | MOD_NOREPEAT, keycode):
logger.debug("We're not the right thread?")
self.thread = None # type: ignore
return
fake = INPUT(INPUT_KEYBOARD, INPUTUNION(ki=KEYBDINPUT(keycode, keycode, 0, 0, None)))
msg = MSG()
logger.debug('Entering GetMessage() loop...')
while GetMessage(ctypes.byref(msg), None, 0, 0) != 0:
logger.debug('Got message')
if msg.message == WM_HOTKEY:
logger.debug('WM_HOTKEY')
if (
config.get_int('hotkey_always')
or window_title(GetForegroundWindow()).startswith('Elite - Dangerous')
):
if not config.shutting_down:
logger.debug('Sending event <<Invoke>>')
self.root.event_generate('<<Invoke>>', when="tail")
else:
logger.debug('Passing key on')
UnregisterHotKey(None, 1)
SendInput(1, fake, ctypes.sizeof(INPUT))
if not RegisterHotKey(None, 1, modifiers | MOD_NOREPEAT, keycode):
logger.debug("We aren't registered for this ?")
break
elif msg.message == WM_SND_GOOD:
logger.debug('WM_SND_GOOD')
winsound.PlaySound(self.snd_good, winsound.SND_MEMORY) # synchronous
elif msg.message == WM_SND_BAD:
logger.debug('WM_SND_BAD')
winsound.PlaySound(self.snd_bad, winsound.SND_MEMORY) # synchronous
else:
logger.debug('Something else')
TranslateMessage(ctypes.byref(msg))
DispatchMessage(ctypes.byref(msg))
logger.debug('Exited GetMessage() loop.')
UnregisterHotKey(None, 1)
self.thread = None # type: ignore
logger.debug('Done.')
def acquire_start(self) -> None:
"""Start acquiring hotkey state via polling."""
pass
def acquire_stop(self) -> None:
"""Stop acquiring hotkey state."""
pass
def fromevent(self, event) -> Optional[Union[bool, Tuple]]: # noqa: CCR001
"""
Return configuration (keycode, modifiers) or None=clear or False=retain previous.
event.state is a pain - it shows the state of the modifiers *before* a modifier key was pressed.
event.state *does* differentiate between left and right Ctrl and Alt and between Return and Enter
by putting KF_EXTENDED in bit 18, but RegisterHotKey doesn't differentiate.
:param event: tk event ?
:return: False to retain previous, None to not use, else (keycode, modifiers)
"""
modifiers = ((GetKeyState(VK_MENU) & 0x8000) and MOD_ALT) \
| ((GetKeyState(VK_CONTROL) & 0x8000) and MOD_CONTROL) \
| ((GetKeyState(VK_SHIFT) & 0x8000) and MOD_SHIFT) \
| ((GetKeyState(VK_LWIN) & 0x8000) and MOD_WIN) \
| ((GetKeyState(VK_RWIN) & 0x8000) and MOD_WIN)
keycode = event.keycode
if keycode in [VK_SHIFT, VK_CONTROL, VK_MENU, VK_LWIN, VK_RWIN]:
return (0, modifiers)
if not modifiers:
if keycode == VK_ESCAPE: # Esc = retain previous
return False
elif keycode in [VK_BACK, VK_DELETE, VK_CLEAR, VK_OEM_CLEAR]: # BkSp, Del, Clear = clear hotkey
return None
elif keycode in [VK_RETURN, VK_SPACE, VK_OEM_MINUS] or ord('A') <= keycode <= ord(
'Z'): # don't allow keys needed for typing in System Map
winsound.MessageBeep()
return None
elif (keycode in [VK_NUMLOCK, VK_SCROLL, VK_PROCESSKEY]
or VK_CAPITAL <= keycode <= VK_MODECHANGE): # ignore unmodified mode switch keys
return (0, modifiers)
# See if the keycode is usable and available
if RegisterHotKey(None, 2, modifiers | MOD_NOREPEAT, keycode):
UnregisterHotKey(None, 2)
return (keycode, modifiers)
else:
winsound.MessageBeep()
return None
def display(self, keycode, modifiers) -> str:
"""
Return displayable form of given hotkey + modifiers.
:param keycode:
:param modifiers:
:return: string form
"""
text = ''
if modifiers & MOD_WIN:
text += u'❖+'
if modifiers & MOD_CONTROL:
text += u'Ctrl+'
if modifiers & MOD_ALT:
text += u'Alt+'
if modifiers & MOD_SHIFT:
text += u'⇧+'
if VK_NUMPAD0 <= keycode <= VK_DIVIDE:
text += u''
if not keycode:
pass
elif VK_F1 <= keycode <= VK_F24:
text += f'F{keycode + 1 - VK_F1}'
elif keycode in WindowsHotkeyMgr.DISPLAY: # specials
text += WindowsHotkeyMgr.DISPLAY[keycode]
else:
c = MapVirtualKey(keycode, 2) # printable ?
if not c: # oops not printable
text += u''
elif c < 0x20: # control keys
text += chr(c + 0x40)
else:
text += chr(c).upper()
return text
def play_good(self) -> None:
"""Play the 'good' sound."""
if self.thread:
PostThreadMessage(self.thread.ident, WM_SND_GOOD, 0, 0)
def play_bad(self) -> None:
"""Play the 'bad' sound."""
if self.thread:
PostThreadMessage(self.thread.ident, WM_SND_BAD, 0, 0)
class LinuxHotKeyMgr(AbstractHotkeyMgr):
"""
Hot key management.
Not actually implemented on Linux. It's a no-op instead.
"""
def register(self, root, keycode, modifiers) -> None:
"""Register the hotkey handler."""
pass
def unregister(self) -> None:
"""Unregister the hotkey handling."""
pass
def play_good(self) -> None:
"""Play the 'good' sound."""
pass
def play_bad(self) -> None:
"""Play the 'bad' sound."""
pass
def get_hotkeymgr() -> AbstractHotkeyMgr:
"""
Determine platform-specific HotkeyMgr.
:param args:
:param kwargs:
:return: Appropriate class instance.
:raises ValueError: If unsupported platform.
"""
if sys.platform == 'darwin':
return MacHotkeyMgr()
elif sys.platform == 'win32':
return WindowsHotkeyMgr()
elif sys.platform == 'linux':
return LinuxHotKeyMgr()
else:
raise ValueError(f'Unknown platform: {sys.platform}')
# singleton
hotkeymgr = get_hotkeymgr()

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hotkey/__init__.py Normal file
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"""Handle keyboard input for manual update triggering."""
# -*- coding: utf-8 -*-
import abc
import sys
from abc import abstractmethod
class AbstractHotkeyMgr(abc.ABC):
"""Abstract root class of all platforms specific HotKeyMgr."""
@abstractmethod
def register(self, root, keycode, modifiers) -> None:
"""Register the hotkey handler."""
pass
@abstractmethod
def unregister(self) -> None:
"""Unregister the hotkey handling."""
pass
@abstractmethod
def play_good(self) -> None:
"""Play the 'good' sound."""
pass
@abstractmethod
def play_bad(self) -> None:
"""Play the 'bad' sound."""
pass
def get_hotkeymgr() -> AbstractHotkeyMgr:
"""
Determine platform-specific HotkeyMgr.
:param args:
:param kwargs:
:return: Appropriate class instance.
:raises ValueError: If unsupported platform.
"""
if sys.platform == 'darwin':
from hotkey.darwin import MacHotkeyMgr
return MacHotkeyMgr()
elif sys.platform == 'win32':
from hotkey.windows import WindowsHotkeyMgr
return WindowsHotkeyMgr()
elif sys.platform == 'linux':
from hotkey.linux import LinuxHotKeyMgr
return LinuxHotKeyMgr()
else:
raise ValueError(f'Unknown platform: {sys.platform}')
# singleton
hotkeymgr = get_hotkeymgr()

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hotkey/darwin.py Normal file
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"""darwin/macOS implementation of hotkey.AbstractHotkeyMgr."""
import pathlib
import sys
import tkinter as tk
from typing import Callable, Optional, Tuple, Union
import objc
from AppKit import (
NSAlternateKeyMask, NSApplication, NSBeep, NSClearLineFunctionKey, NSCommandKeyMask, NSControlKeyMask,
NSDeleteFunctionKey, NSDeviceIndependentModifierFlagsMask, NSEvent, NSF1FunctionKey, NSF35FunctionKey,
NSFlagsChanged, NSKeyDown, NSKeyDownMask, NSKeyUp, NSNumericPadKeyMask, NSShiftKeyMask, NSSound, NSWorkspace
)
from config import config
from EDMCLogging import get_main_logger
from hotkey import AbstractHotkeyMgr
logger = get_main_logger()
class MacHotkeyMgr(AbstractHotkeyMgr):
"""Hot key management."""
POLL = 250
# https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSEvent_Class/#//apple_ref/doc/constant_group/Function_Key_Unicodes
DISPLAY = {
0x03: u'', 0x09: u'', 0xd: u'', 0x19: u'', 0x1b: u'esc', 0x20: u'', 0x7f: u'',
0xf700: u'', 0xf701: u'', 0xf702: u'', 0xf703: u'',
0xf727: u'Ins',
0xf728: u'', 0xf729: u'', 0xf72a: u'Fn', 0xf72b: u'',
0xf72c: u'', 0xf72d: u'', 0xf72e: u'PrtScr', 0xf72f: u'ScrollLock',
0xf730: u'Pause', 0xf731: u'SysReq', 0xf732: u'Break', 0xf733: u'Reset',
0xf739: u'',
}
(ACQUIRE_INACTIVE, ACQUIRE_ACTIVE, ACQUIRE_NEW) = range(3)
def __init__(self):
self.MODIFIERMASK = NSShiftKeyMask | NSControlKeyMask | NSAlternateKeyMask | NSCommandKeyMask \
| NSNumericPadKeyMask
self.root: tk.Tk
self.keycode = 0
self.modifiers = 0
self.activated = False
self.observer = None
self.acquire_key = 0
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
self.tkProcessKeyEvent_old: Callable
self.snd_good = NSSound.alloc().initWithContentsOfFile_byReference_(
pathlib.Path(config.respath_path) / 'snd_good.wav', False
)
self.snd_bad = NSSound.alloc().initWithContentsOfFile_byReference_(
pathlib.Path(config.respath_path) / 'snd_bad.wav', False
)
def register(self, root: tk.Tk, keycode, modifiers) -> None:
"""
Register current hotkey for monitoring.
:param root: parent window.
:param keycode: Key to monitor.
:param modifiers: Any modifiers to take into account.
"""
self.root = root
self.keycode = keycode
self.modifiers = modifiers
self.activated = False
if keycode:
if not self.observer:
self.root.after_idle(self._observe)
self.root.after(MacHotkeyMgr.POLL, self._poll)
# Monkey-patch tk (tkMacOSXKeyEvent.c)
if not callable(self.tkProcessKeyEvent_old):
sel = b'tkProcessKeyEvent:'
cls = NSApplication.sharedApplication().class__() # type: ignore
self.tkProcessKeyEvent_old = NSApplication.sharedApplication().methodForSelector_(sel) # type: ignore
newmethod = objc.selector( # type: ignore
self.tkProcessKeyEvent,
selector=self.tkProcessKeyEvent_old.selector,
signature=self.tkProcessKeyEvent_old.signature
)
objc.classAddMethod(cls, sel, newmethod) # type: ignore
def tkProcessKeyEvent(self, cls, the_event): # noqa: N802
"""
Monkey-patch tk (tkMacOSXKeyEvent.c).
- workaround crash on OSX 10.9 & 10.10 on seeing a composing character
- notice when modifier key state changes
- keep a copy of NSEvent.charactersIgnoringModifiers, which is what we need for the hotkey
(Would like to use a decorator but need to ensure the application is created before this is installed)
:param cls: ???
:param the_event: tk event
:return: ???
"""
if self.acquire_state:
if the_event.type() == NSFlagsChanged:
self.acquire_key = the_event.modifierFlags() & NSDeviceIndependentModifierFlagsMask
self.acquire_state = MacHotkeyMgr.ACQUIRE_NEW
# suppress the event by not chaining the old function
return the_event
elif the_event.type() in (NSKeyDown, NSKeyUp):
c = the_event.charactersIgnoringModifiers()
self.acquire_key = (c and ord(c[0]) or 0) | \
(the_event.modifierFlags() & NSDeviceIndependentModifierFlagsMask)
self.acquire_state = MacHotkeyMgr.ACQUIRE_NEW
# suppress the event by not chaining the old function
return the_event
# replace empty characters with charactersIgnoringModifiers to avoid crash
elif the_event.type() in (NSKeyDown, NSKeyUp) and not the_event.characters():
the_event = NSEvent.keyEventWithType_location_modifierFlags_timestamp_windowNumber_context_characters_charactersIgnoringModifiers_isARepeat_keyCode_( # noqa: E501
# noqa: E501
the_event.type(),
the_event.locationInWindow(),
the_event.modifierFlags(),
the_event.timestamp(),
the_event.windowNumber(),
the_event.context(),
the_event.charactersIgnoringModifiers(),
the_event.charactersIgnoringModifiers(),
the_event.isARepeat(),
the_event.keyCode()
)
return self.tkProcessKeyEvent_old(cls, the_event)
def _observe(self):
# Must be called after root.mainloop() so that the app's message loop has been created
self.observer = NSEvent.addGlobalMonitorForEventsMatchingMask_handler_(NSKeyDownMask, self._handler)
def _poll(self):
if config.shutting_down:
return
# No way of signalling to Tkinter from within the callback handler block that doesn't
# cause Python to crash, so poll.
if self.activated:
self.activated = False
self.root.event_generate('<<Invoke>>', when="tail")
if self.keycode or self.modifiers:
self.root.after(MacHotkeyMgr.POLL, self._poll)
def unregister(self) -> None:
"""Remove hotkey registration."""
self.keycode = 0
self.modifiers = 0
if sys.platform == 'darwin': # noqa: C901
@objc.callbackFor(NSEvent.addGlobalMonitorForEventsMatchingMask_handler_)
def _handler(self, event) -> None:
# use event.charactersIgnoringModifiers to handle composing characters like Alt-e
if (
(event.modifierFlags() & self.MODIFIERMASK) == self.modifiers
and ord(event.charactersIgnoringModifiers()[0]) == self.keycode
):
if config.get_int('hotkey_always'):
self.activated = True
else: # Only trigger if game client is front process
front = NSWorkspace.sharedWorkspace().frontmostApplication()
if front and front.bundleIdentifier() == 'uk.co.frontier.EliteDangerous':
self.activated = True
def acquire_start(self) -> None:
"""Start acquiring hotkey state via polling."""
self.acquire_state = MacHotkeyMgr.ACQUIRE_ACTIVE
self.root.after_idle(self._acquire_poll)
def acquire_stop(self) -> None:
"""Stop acquiring hotkey state."""
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
def _acquire_poll(self) -> None:
"""Perform a poll of current hotkey state."""
if config.shutting_down:
return
# No way of signalling to Tkinter from within the monkey-patched event handler that doesn't
# cause Python to crash, so poll.
if self.acquire_state:
if self.acquire_state == MacHotkeyMgr.ACQUIRE_NEW:
# Abuse tkEvent's keycode field to hold our acquired key & modifier
self.root.event_generate('<KeyPress>', keycode=self.acquire_key)
self.acquire_state = MacHotkeyMgr.ACQUIRE_ACTIVE
self.root.after(50, self._acquire_poll)
def fromevent(self, event) -> Optional[Union[bool, Tuple]]:
"""
Return configuration (keycode, modifiers) or None=clear or False=retain previous.
:param event: tk event ?
:return: False to retain previous, None to not use, else (keycode, modifiers)
"""
(keycode, modifiers) = (event.keycode & 0xffff, event.keycode & 0xffff0000) # Set by _acquire_poll()
if (
keycode
and not (modifiers & (NSShiftKeyMask | NSControlKeyMask | NSAlternateKeyMask | NSCommandKeyMask))
):
if keycode == 0x1b: # Esc = retain previous
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
return False
# BkSp, Del, Clear = clear hotkey
elif keycode in [0x7f, ord(NSDeleteFunctionKey), ord(NSClearLineFunctionKey)]:
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
return None
# don't allow keys needed for typing in System Map
elif keycode in [0x13, 0x20, 0x2d] or 0x61 <= keycode <= 0x7a:
NSBeep()
self.acquire_state = MacHotkeyMgr.ACQUIRE_INACTIVE
return None
return (keycode, modifiers)
def display(self, keycode, modifiers) -> str:
"""
Return displayable form of given hotkey + modifiers.
:param keycode:
:param modifiers:
:return: string form
"""
text = ''
if modifiers & NSControlKeyMask:
text += u''
if modifiers & NSAlternateKeyMask:
text += u''
if modifiers & NSShiftKeyMask:
text += u''
if modifiers & NSCommandKeyMask:
text += u''
if (modifiers & NSNumericPadKeyMask) and keycode <= 0x7f:
text += u''
if not keycode:
pass
elif ord(NSF1FunctionKey) <= keycode <= ord(NSF35FunctionKey):
text += f'F{keycode + 1 - ord(NSF1FunctionKey)}'
elif keycode in MacHotkeyMgr.DISPLAY: # specials
text += MacHotkeyMgr.DISPLAY[keycode]
elif keycode < 0x20: # control keys
text += chr(keycode + 0x40)
elif keycode < 0xf700: # key char
text += chr(keycode).upper()
else:
text += u''
return text
def play_good(self):
"""Play the 'good' sound."""
self.snd_good.play()
def play_bad(self):
"""Play the 'bad' sound."""
self.snd_bad.play()

29
hotkey/linux.py Normal file
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@ -0,0 +1,29 @@
"""Linux implementation of hotkey.AbstractHotkeyMgr."""
from EDMCLogging import get_main_logger
from hotkey import AbstractHotkeyMgr
logger = get_main_logger()
class LinuxHotKeyMgr(AbstractHotkeyMgr):
"""
Hot key management.
Not actually implemented on Linux. It's a no-op instead.
"""
def register(self, root, keycode, modifiers) -> None:
"""Register the hotkey handler."""
pass
def unregister(self) -> None:
"""Unregister the hotkey handling."""
pass
def play_good(self) -> None:
"""Play the 'good' sound."""
pass
def play_bad(self) -> None:
"""Play the 'bad' sound."""
pass

359
hotkey/windows.py Normal file
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@ -0,0 +1,359 @@
"""Windows implementation of hotkey.AbstractHotkeyMgr."""
import atexit
import ctypes
import pathlib
import threading
import tkinter as tk
import winsound
from ctypes.wintypes import DWORD, HWND, LONG, LPWSTR, MSG, ULONG, WORD
from typing import Optional, Tuple, Union
from config import config
from EDMCLogging import get_main_logger
from hotkey import AbstractHotkeyMgr
logger = get_main_logger()
RegisterHotKey = ctypes.windll.user32.RegisterHotKey
UnregisterHotKey = ctypes.windll.user32.UnregisterHotKey
MOD_ALT = 0x0001
MOD_CONTROL = 0x0002
MOD_SHIFT = 0x0004
MOD_WIN = 0x0008
MOD_NOREPEAT = 0x4000
GetMessage = ctypes.windll.user32.GetMessageW
TranslateMessage = ctypes.windll.user32.TranslateMessage
DispatchMessage = ctypes.windll.user32.DispatchMessageW
PostThreadMessage = ctypes.windll.user32.PostThreadMessageW
WM_QUIT = 0x0012
WM_HOTKEY = 0x0312
WM_APP = 0x8000
WM_SND_GOOD = WM_APP + 1
WM_SND_BAD = WM_APP + 2
GetKeyState = ctypes.windll.user32.GetKeyState
MapVirtualKey = ctypes.windll.user32.MapVirtualKeyW
VK_BACK = 0x08
VK_CLEAR = 0x0c
VK_RETURN = 0x0d
VK_SHIFT = 0x10
VK_CONTROL = 0x11
VK_MENU = 0x12
VK_CAPITAL = 0x14
VK_MODECHANGE = 0x1f
VK_ESCAPE = 0x1b
VK_SPACE = 0x20
VK_DELETE = 0x2e
VK_LWIN = 0x5b
VK_RWIN = 0x5c
VK_NUMPAD0 = 0x60
VK_DIVIDE = 0x6f
VK_F1 = 0x70
VK_F24 = 0x87
VK_OEM_MINUS = 0xbd
VK_NUMLOCK = 0x90
VK_SCROLL = 0x91
VK_PROCESSKEY = 0xe5
VK_OEM_CLEAR = 0xfe
GetForegroundWindow = ctypes.windll.user32.GetForegroundWindow
GetWindowText = ctypes.windll.user32.GetWindowTextW
GetWindowText.argtypes = [HWND, LPWSTR, ctypes.c_int]
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
def window_title(h) -> str:
"""
Determine the title for a window.
:param h: Window handle.
:return: Window title.
"""
if h:
title_length = GetWindowTextLength(h) + 1
buf = ctypes.create_unicode_buffer(title_length)
if GetWindowText(h, buf, title_length):
return buf.value
return ''
class MOUSEINPUT(ctypes.Structure):
"""Mouse Input structure."""
_fields_ = [
('dx', LONG),
('dy', LONG),
('mouseData', DWORD),
('dwFlags', DWORD),
('time', DWORD),
('dwExtraInfo', ctypes.POINTER(ULONG))
]
class KEYBDINPUT(ctypes.Structure):
"""Keyboard Input structure."""
_fields_ = [
('wVk', WORD),
('wScan', WORD),
('dwFlags', DWORD),
('time', DWORD),
('dwExtraInfo', ctypes.POINTER(ULONG))
]
class HARDWAREINPUT(ctypes.Structure):
"""Hardware Input structure."""
_fields_ = [
('uMsg', DWORD),
('wParamL', WORD),
('wParamH', WORD)
]
class INPUTUNION(ctypes.Union):
"""Input union."""
_fields_ = [
('mi', MOUSEINPUT),
('ki', KEYBDINPUT),
('hi', HARDWAREINPUT)
]
class INPUT(ctypes.Structure):
"""Input structure."""
_fields_ = [
('type', DWORD),
('union', INPUTUNION)
]
SendInput = ctypes.windll.user32.SendInput
SendInput.argtypes = [ctypes.c_uint, ctypes.POINTER(INPUT), ctypes.c_int]
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
class WindowsHotkeyMgr(AbstractHotkeyMgr):
"""Hot key management."""
# https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731%28v=vs.85%29.aspx
# Limit ourselves to symbols in Windows 7 Segoe UI
DISPLAY = {
0x03: 'Break', 0x08: 'Bksp', 0x09: u'', 0x0c: 'Clear', 0x0d: u'', 0x13: 'Pause',
0x14: u'', 0x1b: 'Esc',
0x20: u'', 0x21: 'PgUp', 0x22: 'PgDn', 0x23: 'End', 0x24: 'Home',
0x25: u'', 0x26: u'', 0x27: u'', 0x28: u'',
0x2c: 'PrtScn', 0x2d: 'Ins', 0x2e: 'Del', 0x2f: 'Help',
0x5d: u'', 0x5f: u'',
0x90: u'', 0x91: 'ScrLk',
0xa6: u'', 0xa7: u'', 0xa9: u'', 0xab: u'', 0xac: u'', 0xb4: u'',
}
def __init__(self) -> None:
self.root: tk.Tk = None # type: ignore
self.thread: threading.Thread = None # type: ignore
with open(pathlib.Path(config.respath) / 'snd_good.wav', 'rb') as sg:
self.snd_good = sg.read()
with open(pathlib.Path(config.respath) / 'snd_bad.wav', 'rb') as sb:
self.snd_bad = sb.read()
atexit.register(self.unregister)
def register(self, root: tk.Tk, keycode, modifiers) -> None:
"""Register the hotkey handler."""
self.root = root
if self.thread:
logger.debug('Was already registered, unregistering...')
self.unregister()
if keycode or modifiers:
logger.debug('Creating thread worker...')
self.thread = threading.Thread(
target=self.worker,
name=f'Hotkey "{keycode}:{modifiers}"',
args=(keycode, modifiers)
)
self.thread.daemon = True
logger.debug('Starting thread worker...')
self.thread.start()
logger.debug('Done.')
def unregister(self) -> None:
"""Unregister the hotkey handling."""
thread = self.thread
if thread:
logger.debug('Thread is/was running')
self.thread = None # type: ignore
logger.debug('Telling thread WM_QUIT')
PostThreadMessage(thread.ident, WM_QUIT, 0, 0)
logger.debug('Joining thread')
thread.join() # Wait for it to unregister hotkey and quit
else:
logger.debug('No thread')
logger.debug('Done.')
def worker(self, keycode, modifiers) -> None: # noqa: CCR001
"""Handle hotkeys."""
logger.debug('Begin...')
# Hotkey must be registered by the thread that handles it
if not RegisterHotKey(None, 1, modifiers | MOD_NOREPEAT, keycode):
logger.debug("We're not the right thread?")
self.thread = None # type: ignore
return
fake = INPUT(INPUT_KEYBOARD, INPUTUNION(ki=KEYBDINPUT(keycode, keycode, 0, 0, None)))
msg = MSG()
logger.debug('Entering GetMessage() loop...')
while GetMessage(ctypes.byref(msg), None, 0, 0) != 0:
logger.debug('Got message')
if msg.message == WM_HOTKEY:
logger.debug('WM_HOTKEY')
if (
config.get_int('hotkey_always')
or window_title(GetForegroundWindow()).startswith('Elite - Dangerous')
):
if not config.shutting_down:
logger.debug('Sending event <<Invoke>>')
self.root.event_generate('<<Invoke>>', when="tail")
else:
logger.debug('Passing key on')
UnregisterHotKey(None, 1)
SendInput(1, fake, ctypes.sizeof(INPUT))
if not RegisterHotKey(None, 1, modifiers | MOD_NOREPEAT, keycode):
logger.debug("We aren't registered for this ?")
break
elif msg.message == WM_SND_GOOD:
logger.debug('WM_SND_GOOD')
winsound.PlaySound(self.snd_good, winsound.SND_MEMORY) # synchronous
elif msg.message == WM_SND_BAD:
logger.debug('WM_SND_BAD')
winsound.PlaySound(self.snd_bad, winsound.SND_MEMORY) # synchronous
else:
logger.debug('Something else')
TranslateMessage(ctypes.byref(msg))
DispatchMessage(ctypes.byref(msg))
logger.debug('Exited GetMessage() loop.')
UnregisterHotKey(None, 1)
self.thread = None # type: ignore
logger.debug('Done.')
def acquire_start(self) -> None:
"""Start acquiring hotkey state via polling."""
pass
def acquire_stop(self) -> None:
"""Stop acquiring hotkey state."""
pass
def fromevent(self, event) -> Optional[Union[bool, Tuple]]: # noqa: CCR001
"""
Return configuration (keycode, modifiers) or None=clear or False=retain previous.
event.state is a pain - it shows the state of the modifiers *before* a modifier key was pressed.
event.state *does* differentiate between left and right Ctrl and Alt and between Return and Enter
by putting KF_EXTENDED in bit 18, but RegisterHotKey doesn't differentiate.
:param event: tk event ?
:return: False to retain previous, None to not use, else (keycode, modifiers)
"""
modifiers = ((GetKeyState(VK_MENU) & 0x8000) and MOD_ALT) \
| ((GetKeyState(VK_CONTROL) & 0x8000) and MOD_CONTROL) \
| ((GetKeyState(VK_SHIFT) & 0x8000) and MOD_SHIFT) \
| ((GetKeyState(VK_LWIN) & 0x8000) and MOD_WIN) \
| ((GetKeyState(VK_RWIN) & 0x8000) and MOD_WIN)
keycode = event.keycode
if keycode in [VK_SHIFT, VK_CONTROL, VK_MENU, VK_LWIN, VK_RWIN]:
return (0, modifiers)
if not modifiers:
if keycode == VK_ESCAPE: # Esc = retain previous
return False
elif keycode in [VK_BACK, VK_DELETE, VK_CLEAR, VK_OEM_CLEAR]: # BkSp, Del, Clear = clear hotkey
return None
elif keycode in [VK_RETURN, VK_SPACE, VK_OEM_MINUS] or ord('A') <= keycode <= ord(
'Z'): # don't allow keys needed for typing in System Map
winsound.MessageBeep()
return None
elif (keycode in [VK_NUMLOCK, VK_SCROLL, VK_PROCESSKEY]
or VK_CAPITAL <= keycode <= VK_MODECHANGE): # ignore unmodified mode switch keys
return (0, modifiers)
# See if the keycode is usable and available
if RegisterHotKey(None, 2, modifiers | MOD_NOREPEAT, keycode):
UnregisterHotKey(None, 2)
return (keycode, modifiers)
else:
winsound.MessageBeep()
return None
def display(self, keycode, modifiers) -> str:
"""
Return displayable form of given hotkey + modifiers.
:param keycode:
:param modifiers:
:return: string form
"""
text = ''
if modifiers & MOD_WIN:
text += u'❖+'
if modifiers & MOD_CONTROL:
text += u'Ctrl+'
if modifiers & MOD_ALT:
text += u'Alt+'
if modifiers & MOD_SHIFT:
text += u'⇧+'
if VK_NUMPAD0 <= keycode <= VK_DIVIDE:
text += u''
if not keycode:
pass
elif VK_F1 <= keycode <= VK_F24:
text += f'F{keycode + 1 - VK_F1}'
elif keycode in WindowsHotkeyMgr.DISPLAY: # specials
text += WindowsHotkeyMgr.DISPLAY[keycode]
else:
c = MapVirtualKey(keycode, 2) # printable ?
if not c: # oops not printable
text += u''
elif c < 0x20: # control keys
text += chr(c + 0x40)
else:
text += chr(c).upper()
return text
def play_good(self) -> None:
"""Play the 'good' sound."""
if self.thread:
PostThreadMessage(self.thread.ident, WM_SND_GOOD, 0, 0)
def play_bad(self) -> None:
"""Play the 'bad' sound."""
if self.thread:
PostThreadMessage(self.thread.ident, WM_SND_BAD, 0, 0)