You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
586 lines
18 KiB
Python
586 lines
18 KiB
Python
#!/usr/bin/python3
|
|
# -*- coding: utf-8 -*-
|
|
# key-mapper - GUI for device specific keyboard mappings
|
|
# Copyright (C) 2021 sezanzeb <proxima@sezanzeb.de>
|
|
#
|
|
# This file is part of key-mapper.
|
|
#
|
|
# key-mapper is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# key-mapper 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 General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with key-mapper. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
|
|
"""Executes more complex patterns of keystrokes.
|
|
|
|
To keep it short on the UI, the available functions are one-letter long.
|
|
|
|
The outermost macro (in the examples below the one created by 'r',
|
|
'r' and 'w') will be started, which triggers a chain reaction to execute
|
|
all of the configured stuff.
|
|
|
|
Examples
|
|
--------
|
|
r(3, k(a).w(10)): a <10ms> a <10ms> a
|
|
r(2, k(a).k(-)).k(b): a - a - b
|
|
w(1000).m(Shift_L, r(2, k(a))).w(10).k(b): <1s> A A <10ms> b
|
|
"""
|
|
|
|
|
|
import asyncio
|
|
import re
|
|
import copy
|
|
|
|
from evdev.ecodes import ecodes, EV_KEY, EV_REL, REL_X, REL_Y, REL_WHEEL, \
|
|
REL_HWHEEL
|
|
|
|
from keymapper.logger import logger
|
|
from keymapper.state import system_mapping
|
|
|
|
|
|
def is_this_a_macro(output):
|
|
"""Figure out if this is a macro."""
|
|
if not isinstance(output, str):
|
|
return False
|
|
|
|
if '+' in output.strip():
|
|
# for example "a + b"
|
|
return True
|
|
|
|
return '(' in output and ')' in output and len(output) >= 4
|
|
|
|
|
|
class _Macro:
|
|
"""Supports chaining and preparing actions.
|
|
|
|
Calling functions on _Macro does not inject anything yet, it means that
|
|
once .run is used it will be executed along with all other queued tasks.
|
|
"""
|
|
def __init__(self, code, mapping):
|
|
"""Create a macro instance that can be populated with tasks.
|
|
|
|
Parameters
|
|
----------
|
|
code : string or None
|
|
The original parsed code, for logging purposes.
|
|
mapping : Mapping
|
|
The preset object, needed for some config stuff
|
|
"""
|
|
self.tasks = []
|
|
self.code = code
|
|
self.mapping = mapping
|
|
|
|
# is a lock so that h() can be realized
|
|
self._holding_lock = asyncio.Lock()
|
|
|
|
self.running = False
|
|
|
|
# all required capabilities, without those of child macros
|
|
self.capabilities = {
|
|
EV_KEY: set(),
|
|
EV_REL: set(),
|
|
}
|
|
|
|
self.child_macros = []
|
|
|
|
def is_holding(self):
|
|
"""Check if the macro is waiting for a key to be released."""
|
|
return self._holding_lock.locked()
|
|
|
|
def get_capabilities(self):
|
|
"""Resolve all capabilities of the macro and those of its children."""
|
|
capabilities = copy.deepcopy(self.capabilities)
|
|
|
|
for macro in self.child_macros:
|
|
macro_capabilities = macro.get_capabilities()
|
|
for ev_type in macro_capabilities:
|
|
if ev_type not in capabilities:
|
|
capabilities[ev_type] = set()
|
|
|
|
capabilities[ev_type].update(macro_capabilities[ev_type])
|
|
|
|
return capabilities
|
|
|
|
async def run(self, handler):
|
|
"""Run the macro.
|
|
|
|
Parameters
|
|
----------
|
|
handler : function
|
|
Will receive int type, code and value for an event to write
|
|
"""
|
|
if self.running:
|
|
logger.error('Tried to run already running macro "%s"', self.code)
|
|
return
|
|
|
|
self.running = True
|
|
for task in self.tasks:
|
|
# one could call tasks the compiled macros. it's lambda functions
|
|
# that receive the handler as an argument, so that they know
|
|
# where to send the event to.
|
|
coroutine = task(handler)
|
|
if asyncio.iscoroutine(coroutine):
|
|
await coroutine
|
|
|
|
# done
|
|
self.running = False
|
|
|
|
def press_key(self):
|
|
"""The user pressed the key down."""
|
|
if self.is_holding():
|
|
logger.error('Already holding')
|
|
return
|
|
|
|
asyncio.ensure_future(self._holding_lock.acquire())
|
|
|
|
for macro in self.child_macros:
|
|
macro.press_key()
|
|
|
|
def release_key(self):
|
|
"""The user released the key."""
|
|
if self._holding_lock is not None:
|
|
self._holding_lock.release()
|
|
|
|
for macro in self.child_macros:
|
|
macro.release_key()
|
|
|
|
def hold(self, macro=None):
|
|
"""Loops the execution until key release."""
|
|
if macro is None:
|
|
# no parameters: block until released
|
|
async def task(_):
|
|
# wait until the key is released. Only then it will be
|
|
# able to acquire the lock. Release it right after so that
|
|
# it can be acquired by press_key again.
|
|
try:
|
|
await self._holding_lock.acquire()
|
|
self._holding_lock.release()
|
|
except RuntimeError as error:
|
|
# The specific bug in question has been fixed already,
|
|
# but lets keep this check here for the future. Not
|
|
# catching errors here causes the macro to never be
|
|
# released
|
|
logger.error('Failed h(): %s', error)
|
|
|
|
self.tasks.append(task)
|
|
else:
|
|
if not isinstance(macro, _Macro):
|
|
raise ValueError(
|
|
'Expected the param for h (hold) to be '
|
|
f'a macro (like k(a)), but got "{macro}"'
|
|
)
|
|
|
|
async def task(handler):
|
|
while self.is_holding():
|
|
# run the child macro completely to avoid
|
|
# not-releasing any key
|
|
await macro.run(handler)
|
|
|
|
self.tasks.append(task)
|
|
self.child_macros.append(macro)
|
|
|
|
return self
|
|
|
|
def modify(self, modifier, macro):
|
|
"""Do stuff while a modifier is activated.
|
|
|
|
Parameters
|
|
----------
|
|
modifier : str
|
|
macro : _Macro
|
|
"""
|
|
if not isinstance(macro, _Macro):
|
|
raise ValueError(
|
|
'Expected the second param for m (modify) to be '
|
|
f'a macro (like k(a)), but got {macro}'
|
|
)
|
|
|
|
modifier = str(modifier)
|
|
code = system_mapping.get(modifier)
|
|
|
|
if code is None:
|
|
raise KeyError(f'Unknown modifier "{modifier}"')
|
|
|
|
self.capabilities[EV_KEY].add(code)
|
|
|
|
self.child_macros.append(macro)
|
|
|
|
self.tasks.append(lambda handler: handler(EV_KEY, code, 1))
|
|
self.add_keycode_pause()
|
|
self.tasks.append(macro.run)
|
|
self.add_keycode_pause()
|
|
self.tasks.append(lambda handler: handler(EV_KEY, code, 0))
|
|
self.add_keycode_pause()
|
|
return self
|
|
|
|
def repeat(self, repeats, macro):
|
|
"""Repeat actions.
|
|
|
|
Parameters
|
|
----------
|
|
repeats : int
|
|
macro : _Macro
|
|
"""
|
|
if not isinstance(macro, _Macro):
|
|
raise ValueError(
|
|
'Expected the second param for r (repeat) to be '
|
|
f'a macro (like k(a)), but got "{macro}"'
|
|
)
|
|
|
|
try:
|
|
repeats = int(repeats)
|
|
except ValueError as error:
|
|
raise ValueError(
|
|
'Expected the first param for r (repeat) to be '
|
|
f'a number, but got "{repeats}"'
|
|
) from error
|
|
|
|
for _ in range(repeats):
|
|
self.tasks.append(macro.run)
|
|
|
|
self.child_macros.append(macro)
|
|
|
|
return self
|
|
|
|
def add_keycode_pause(self):
|
|
"""To add a pause between keystrokes."""
|
|
sleeptime = self.mapping.get('macros.keystroke_sleep_ms') / 1000
|
|
|
|
async def sleep(_):
|
|
await asyncio.sleep(sleeptime)
|
|
|
|
self.tasks.append(sleep)
|
|
|
|
def keycode(self, character):
|
|
"""Write the character."""
|
|
character = str(character)
|
|
code = system_mapping.get(character)
|
|
|
|
if code is None:
|
|
raise KeyError(f'Unknown key "{character}"')
|
|
|
|
self.capabilities[EV_KEY].add(code)
|
|
|
|
self.tasks.append(lambda handler: handler(EV_KEY, code, 1))
|
|
self.add_keycode_pause()
|
|
self.tasks.append(lambda handler: handler(EV_KEY, code, 0))
|
|
self.add_keycode_pause()
|
|
return self
|
|
|
|
def event(self, ev_type, code, value):
|
|
"""Write any event.
|
|
|
|
Parameters
|
|
----------
|
|
ev_type: str or int
|
|
examples: 2, 'EV_KEY'
|
|
code : int or int
|
|
examples: 52, 'KEY_A'
|
|
value : int
|
|
"""
|
|
if isinstance(ev_type, str):
|
|
ev_type = ecodes[ev_type.upper()]
|
|
if isinstance(code, str):
|
|
code = ecodes[code.upper()]
|
|
|
|
if ev_type not in self.capabilities:
|
|
self.capabilities[ev_type] = set()
|
|
|
|
if ev_type == EV_REL:
|
|
# add all capabilities that are required for the display server
|
|
# to recognize the device as mouse
|
|
self.capabilities[EV_REL].add(REL_X)
|
|
self.capabilities[EV_REL].add(REL_Y)
|
|
self.capabilities[EV_REL].add(REL_WHEEL)
|
|
|
|
self.capabilities[ev_type].add(code)
|
|
|
|
self.tasks.append(lambda handler: handler(ev_type, code, value))
|
|
self.add_keycode_pause()
|
|
|
|
return self
|
|
|
|
def mouse(self, direction, speed):
|
|
"""Shortcut for h(e(...))."""
|
|
code, value = {
|
|
'up': (REL_Y, -1),
|
|
'down': (REL_Y, 1),
|
|
'left': (REL_X, -1),
|
|
'right': (REL_X, 1),
|
|
}[direction.lower()]
|
|
value *= speed
|
|
child_macro = _Macro(None, self.mapping)
|
|
child_macro.event(EV_REL, code, value)
|
|
self.hold(child_macro)
|
|
|
|
def wheel(self, direction, speed):
|
|
"""Shortcut for h(e(...))."""
|
|
code, value = {
|
|
'up': (REL_WHEEL, 1),
|
|
'down': (REL_WHEEL, -1),
|
|
'left': (REL_HWHEEL, 1),
|
|
'right': (REL_HWHEEL, -1),
|
|
}[direction.lower()]
|
|
child_macro = _Macro(None, self.mapping)
|
|
child_macro.event(EV_REL, code, value)
|
|
child_macro.wait(100 / speed)
|
|
self.hold(child_macro)
|
|
|
|
def wait(self, sleeptime):
|
|
"""Wait time in milliseconds."""
|
|
try:
|
|
sleeptime = int(sleeptime)
|
|
except ValueError as error:
|
|
raise ValueError(
|
|
'Expected the param for w (wait) to be '
|
|
f'a number, but got "{sleeptime}"'
|
|
) from error
|
|
|
|
sleeptime /= 1000
|
|
|
|
async def sleep(_):
|
|
await asyncio.sleep(sleeptime)
|
|
|
|
self.tasks.append(sleep)
|
|
return self
|
|
|
|
|
|
def _extract_params(inner):
|
|
"""Extract parameters from the inner contents of a call.
|
|
|
|
Parameters
|
|
----------
|
|
inner : string
|
|
for example 'r, r(2, k(a))' should result in ['r', 'r(2, k(a)']
|
|
"""
|
|
inner = inner.strip()
|
|
brackets = 0
|
|
params = []
|
|
start = 0
|
|
for position, char in enumerate(inner):
|
|
if char == '(':
|
|
brackets += 1
|
|
if char == ')':
|
|
brackets -= 1
|
|
if char == ',' and brackets == 0:
|
|
# , potentially starts another parameter, but only if
|
|
# the current brackets are all closed.
|
|
params.append(inner[start:position].strip())
|
|
# skip the comma
|
|
start = position + 1
|
|
|
|
# one last parameter
|
|
params.append(inner[start:].strip())
|
|
|
|
return params
|
|
|
|
|
|
def _count_brackets(macro):
|
|
"""Find where the first opening bracket closes."""
|
|
openings = macro.count('(')
|
|
closings = macro.count(')')
|
|
if openings != closings:
|
|
raise Exception(
|
|
f'You entered {openings} opening and {closings} '
|
|
'closing brackets'
|
|
)
|
|
|
|
brackets = 0
|
|
position = 0
|
|
for char in macro:
|
|
position += 1
|
|
if char == '(':
|
|
brackets += 1
|
|
continue
|
|
|
|
if char == ')':
|
|
brackets -= 1
|
|
if brackets == 0:
|
|
# the closing bracket of the call
|
|
break
|
|
|
|
return position
|
|
|
|
|
|
def _parse_recurse(macro, mapping, macro_instance=None, depth=0):
|
|
"""Handle a subset of the macro, e.g. one parameter or function call.
|
|
|
|
Parameters
|
|
----------
|
|
macro : string
|
|
Just like parse
|
|
mapping : Mapping
|
|
The preset configuration
|
|
macro_instance : _Macro or None
|
|
A macro instance to add tasks to
|
|
depth : int
|
|
"""
|
|
# to anyone who knows better about compilers and thinks this is horrible:
|
|
# please make a pull request. Because it probably is.
|
|
# not using eval for security reasons ofc. And this syntax doesn't need
|
|
# string quotes for its params.
|
|
# If this gets more complicated than that I'd rather make a macro
|
|
# editor GUI and store them as json.
|
|
assert isinstance(macro, str)
|
|
assert isinstance(depth, int)
|
|
|
|
if macro == '':
|
|
return None
|
|
|
|
if macro_instance is None:
|
|
macro_instance = _Macro(macro, mapping)
|
|
else:
|
|
assert isinstance(macro_instance, _Macro)
|
|
|
|
macro = macro.strip()
|
|
space = ' ' * depth
|
|
|
|
# is it another macro?
|
|
call_match = re.match(r'^(\w+)\(', macro)
|
|
call = call_match[1] if call_match else None
|
|
if call is not None:
|
|
# available functions in the macro and the minimum and maximum number
|
|
# of their parameters
|
|
functions = {
|
|
'm': (macro_instance.modify, 2, 2),
|
|
'r': (macro_instance.repeat, 2, 2),
|
|
'k': (macro_instance.keycode, 1, 1),
|
|
'e': (macro_instance.event, 3, 3),
|
|
'w': (macro_instance.wait, 1, 1),
|
|
'h': (macro_instance.hold, 0, 1),
|
|
'mouse': (macro_instance.mouse, 2, 2),
|
|
'wheel': (macro_instance.wheel, 2, 2)
|
|
}
|
|
|
|
function = functions.get(call)
|
|
if function is None:
|
|
raise Exception(f'Unknown function {call}')
|
|
|
|
# get all the stuff inbetween
|
|
position = _count_brackets(macro)
|
|
|
|
inner = macro[macro.index('(') + 1:position - 1]
|
|
|
|
# split "3, k(a).w(10)" into parameters
|
|
string_params = _extract_params(inner)
|
|
logger.spam('%scalls %s with %s', space, call, string_params)
|
|
# evaluate the params
|
|
params = [
|
|
_parse_recurse(param.strip(), mapping, None, depth + 1)
|
|
for param in string_params
|
|
]
|
|
|
|
logger.spam('%sadd call to %s with %s', space, call, params)
|
|
|
|
if len(params) < function[1] or len(params) > function[2]:
|
|
if function[1] != function[2]:
|
|
msg = (
|
|
f'{call} takes between {function[1]} and {function[2]}, '
|
|
f'not {len(params)} parameters'
|
|
)
|
|
else:
|
|
msg = (
|
|
f'{call} takes {function[1]}, '
|
|
f'not {len(params)} parameters'
|
|
)
|
|
|
|
raise ValueError(msg)
|
|
|
|
function[0](*params)
|
|
|
|
# is after this another call? Chain it to the macro_instance
|
|
if len(macro) > position and macro[position] == '.':
|
|
chain = macro[position + 1:]
|
|
logger.spam('%sfollowed by %s', space, chain)
|
|
_parse_recurse(chain, mapping, macro_instance, depth)
|
|
|
|
return macro_instance
|
|
|
|
# probably a parameter for an outer function
|
|
try:
|
|
# if possible, parse as int
|
|
macro = int(macro)
|
|
except ValueError:
|
|
# use as string instead
|
|
pass
|
|
|
|
logger.spam('%s%s %s', space, type(macro), macro)
|
|
return macro
|
|
|
|
|
|
def handle_plus_syntax(macro):
|
|
"""transform a + b + c to m(a, m(b, m(c, h())))"""
|
|
if '+' not in macro:
|
|
return macro
|
|
|
|
if '(' in macro or ')' in macro:
|
|
logger.error('Mixing "+" and macros is unsupported: "%s"', macro)
|
|
return macro
|
|
|
|
chunks = [chunk.strip() for chunk in macro.split('+')]
|
|
output = ''
|
|
depth = 0
|
|
for chunk in chunks:
|
|
if chunk == '':
|
|
# invalid syntax
|
|
logger.error('Invalid syntax for "%s"', macro)
|
|
return macro
|
|
|
|
depth += 1
|
|
output += f'm({chunk},'
|
|
|
|
output += 'h()'
|
|
output += depth * ')'
|
|
|
|
logger.debug('Transformed "%s" to "%s"', macro, output)
|
|
return output
|
|
|
|
|
|
def parse(macro, mapping, return_errors=False):
|
|
"""parse and generate a _Macro that can be run as often as you want.
|
|
|
|
If it could not be parsed, possibly due to syntax errors, will log the
|
|
error and return None.
|
|
|
|
Parameters
|
|
----------
|
|
macro : string
|
|
"r(3, k(a).w(10))"
|
|
"r(2, k(a).k(-)).k(b)"
|
|
"w(1000).m(Shift_L, r(2, k(a))).w(10, 20).k(b)"
|
|
mapping : Mapping
|
|
The preset object, needed for some config stuff
|
|
return_errors : bool
|
|
If True, returns errors as a string or None if parsing worked.
|
|
If False, returns the parsed macro.
|
|
"""
|
|
macro = handle_plus_syntax(macro)
|
|
|
|
# whitespaces, tabs, newlines and such don't serve a purpose. make
|
|
# the log output clearer and the parsing easier.
|
|
macro = re.sub(r'\s', '', macro)
|
|
|
|
if '"' in macro or "'" in macro:
|
|
logger.info('Quotation marks in macros are not needed')
|
|
macro = macro.replace('"', '').replace("'", '')
|
|
|
|
if return_errors:
|
|
logger.spam('checking the syntax of %s', macro)
|
|
else:
|
|
logger.spam('preparing macro %s for later execution', macro)
|
|
|
|
try:
|
|
macro_object = _parse_recurse(macro, mapping)
|
|
return macro_object if not return_errors else None
|
|
except Exception as error:
|
|
logger.error('Failed to parse macro "%s": %s', macro, error.__repr__())
|
|
return str(error) if return_errors else None
|