mirror of
https://github.com/sezanzeb/input-remapper
synced 2024-11-12 01:10:38 +00:00
700 lines
23 KiB
Python
700 lines
23 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# input-remapper - GUI for device specific keyboard mappings
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# Copyright (C) 2022 sezanzeb <proxima@sezanzeb.de>
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#
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# This file is part of input-remapper.
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#
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# input-remapper is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# input-remapper is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with input-remapper. If not, see <https://www.gnu.org/licenses/>.
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"""Executes more complex patterns of keystrokes.
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To keep it short on the UI, basic functions are one letter long.
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The outermost macro (in the examples below the one created by 'r',
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'r' and 'w') will be started, which triggers a chain reaction to execute
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all of the configured stuff.
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Examples
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--------
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r(3, k(a).w(10)): a <10ms> a <10ms> a
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r(2, k(a).k(KEY_A)).k(b): a - a - b
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w(1000).m(Shift_L, r(2, k(a))).w(10).k(b): <1s> A A <10ms> b
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"""
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import asyncio
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import copy
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import math
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import re
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from typing import List, Callable, Awaitable, Tuple
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from evdev.ecodes import (
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ecodes,
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EV_KEY,
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EV_REL,
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REL_X,
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REL_Y,
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REL_WHEEL_HI_RES,
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REL_HWHEEL_HI_RES,
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REL_WHEEL,
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REL_HWHEEL,
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)
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from inputremapper.configs.system_mapping import system_mapping
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from inputremapper.exceptions import MacroParsingError
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from inputremapper.ipc.shared_dict import SharedDict
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from inputremapper.logger import logger
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Handler = Callable[[Tuple[int, int, int]], None]
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MacroTask = Callable[[Handler], Awaitable]
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macro_variables = SharedDict()
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class Variable:
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"""Can be used as function parameter in the various add_... functions.
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Parsed from strings like `$foo` in `repeat($foo, k(KEY_A))`
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Its value is unknown during construction and needs to be set using the `set` macro
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during runtime.
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"""
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def __init__(self, name):
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self.name = name
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def resolve(self):
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"""Get the variables value from memory."""
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return macro_variables.get(self.name)
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def __repr__(self):
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return f'<Variable "{self.name}">'
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def _type_check(value, allowed_types, display_name=None, position=None):
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"""Validate a parameter used in a macro.
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If the value is a Variable, it will be returned and should be resolved
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during runtime with _resolve.
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"""
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if isinstance(value, Variable):
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# it is a variable and will be read at runtime
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return value
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for allowed_type in allowed_types:
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if allowed_type is None:
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if value is None:
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return value
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continue
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# try to parse "1" as 1 if possible
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if allowed_type != Macro:
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# the macro constructor with a single argument always succeeds,
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# but will definitely not result in the correct macro
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try:
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return allowed_type(value)
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except (TypeError, ValueError):
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pass
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if isinstance(value, allowed_type):
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return value
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if display_name is not None and position is not None:
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raise MacroParsingError(
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msg=f"Expected parameter {position} for {display_name} to be "
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f"one of {allowed_types}, but got {value}"
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)
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raise MacroParsingError(
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msg=f"Expected parameter to be one of {allowed_types}, but got {value}"
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)
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def _type_check_symbol(keyname):
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"""Same as _type_check, but checks if the key-name is valid."""
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if isinstance(keyname, Variable):
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# it is a variable and will be read at runtime
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return keyname
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symbol = str(keyname)
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code = system_mapping.get(symbol)
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if code is None:
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raise MacroParsingError(msg=f'Unknown key "{symbol}"')
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return code
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def _type_check_variablename(name):
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"""Check if this is a legit variable name.
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Because they could clash with language features. If the macro is able to be
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parsed at all due to a problematic choice of a variable name.
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Allowed examples: "foo", "Foo1234_", "_foo_1234"
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Not allowed: "1_foo", "foo=blub", "$foo", "foo,1234", "foo()"
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"""
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if not isinstance(name, str) or not re.match(r"^[A-Za-z_][A-Za-z_0-9]*$", name):
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raise MacroParsingError(msg=f'"{name}" is not a legit variable name')
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def _resolve(argument, allowed_types=None):
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"""If the argument is a variable, figure out its value and cast it.
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Variables are prefixed with `$` in the syntax.
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Use this just-in-time when you need the actual value of the variable
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during runtime.
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"""
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if isinstance(argument, Variable):
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value = argument.resolve()
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logger.debug('"%s" is "%s"', argument, value)
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if allowed_types:
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return _type_check(value, allowed_types)
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else:
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return value
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return argument
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class Macro:
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"""Supports chaining and preparing actions.
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Calling functions like keycode on Macro doesn't inject any events yet,
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it means that once .run is used it will be executed along with all other
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queued tasks.
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Those functions need to construct an asyncio coroutine and append it to
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self.tasks. This makes parameter checking during compile time possible, as long
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as they are not variables that are resolved durig runtime. Coroutines receive a
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handler as argument, which is a function that can be used to inject input events
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into the system.
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1. A few parameters of any time are thrown into a macro function like `repeat`
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2. `Macro.repeat` will verify the parameter types if possible using `_type_check`
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(it can't for $variables). This helps debugging macros before the injection
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starts, but is not mandatory to make things work.
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3. `Macro.repeat`
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- adds a task to self.tasks. This task resolves any variables with `_resolve`
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and does what the macro is supposed to do once `macro.run` is called.
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- also adds the child macro to self.child_macros.
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- adds the used keys to the capabilities
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4. `Macro.run` will run all tasks in self.tasks
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"""
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def __init__(self, code: str, context=None, mapping=None):
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"""Create a macro instance that can be populated with tasks.
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Parameters
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----------
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code : string or None
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The original parsed code, for logging purposes.
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context : Context, or None for use in frontend
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"""
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self.code = code
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self.context = context
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self.mapping = mapping
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# List of coroutines that will be called sequentially.
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# This is the compiled code
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self.tasks: List[MacroTask] = []
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# can be used to wait for the release of the event
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self._trigger_release_event = asyncio.Event()
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self._trigger_press_event = asyncio.Event()
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# released by default
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self._trigger_release_event.set()
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self._trigger_press_event.clear()
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self.running = False
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self.child_macros: List[Macro] = []
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self.keystroke_sleep_ms = None
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def is_holding(self):
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"""Check if the macro is waiting for a key to be released."""
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return not self._trigger_release_event.is_set()
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def get_capabilities(self):
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"""Get the merged capabilities of the macro and its children."""
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capabilities = copy.deepcopy(self.capabilities)
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for macro in self.child_macros:
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macro_capabilities = macro.get_capabilities()
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for ev_type in macro_capabilities:
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if ev_type not in capabilities:
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capabilities[ev_type] = set()
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capabilities[ev_type].update(macro_capabilities[ev_type])
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return capabilities
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async def run(self, handler):
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"""Run the macro.
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Parameters
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----------
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handler : function
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Will receive int type, code and value for an event to write
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"""
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if not callable(handler):
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raise ValueError("handler is not callable")
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if self.running:
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logger.error('Tried to run already running macro "%s"', self.code)
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return
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self.keystroke_sleep_ms = self.mapping.macro_key_sleep_ms
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self.running = True
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try:
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for task in self.tasks:
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coroutine = task(handler)
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if asyncio.iscoroutine(coroutine):
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await coroutine
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except Exception as e:
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raise
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finally:
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# done
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self.running = False
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def press_trigger(self):
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"""The user pressed the trigger key down."""
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if self.is_holding():
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logger.error("Already holding")
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return
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self._trigger_release_event.clear()
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self._trigger_press_event.set()
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for macro in self.child_macros:
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macro.press_trigger()
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def release_trigger(self):
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"""The user released the trigger key."""
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self._trigger_release_event.set()
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self._trigger_press_event.clear()
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for macro in self.child_macros:
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macro.release_trigger()
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async def _keycode_pause(self, _=None):
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"""To add a pause between keystrokes.
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This was needed at some point because it appeared that injecting keys too
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fast will prevent them from working. It probably depends on the environment.
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"""
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await asyncio.sleep(self.keystroke_sleep_ms / 1000)
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def __repr__(self):
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return f'<Macro "{self.code}">'
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"""Functions that prepare the macro"""
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def add_key(self, symbol):
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"""Write the symbol."""
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# This is done to figure out if the macro is broken at compile time, because
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# if KEY_A was unknown we can show this in the gui before the injection starts.
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_type_check_symbol(symbol)
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async def task(handler):
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# if the code is $foo, figure out the correct code now.
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resolved_symbol = _resolve(symbol, [str])
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code = _type_check_symbol(resolved_symbol)
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resolved_code = _resolve(code, [int])
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handler(EV_KEY, resolved_code, 1)
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await self._keycode_pause()
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handler(EV_KEY, resolved_code, 0)
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await self._keycode_pause()
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self.tasks.append(task)
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def add_key_down(self, symbol):
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"""Press the symbol."""
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_type_check_symbol(symbol)
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async def task(handler):
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resolved_symbol = _resolve(symbol, [str])
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code = _type_check_symbol(resolved_symbol)
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resolved_code = _resolve(code, [int])
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handler(EV_KEY, resolved_code, 1)
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self.tasks.append(task)
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def add_key_up(self, symbol):
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"""Release the symbol."""
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_type_check_symbol(symbol)
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async def task(handler):
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resolved_symbol = _resolve(symbol, [str])
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code = _type_check_symbol(resolved_symbol)
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resolved_code = _resolve(code, [int])
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handler(EV_KEY, resolved_code, 0)
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self.tasks.append(task)
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def add_hold(self, macro=None):
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"""Loops the execution until key release."""
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_type_check(macro, [Macro, str, None], "hold", 1)
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if macro is None:
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self.tasks.append(lambda _: self._trigger_release_event.wait())
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return
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if not isinstance(macro, Macro):
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# if macro is a key name, hold down the key while the
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# keyboard key is physically held down
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symbol = macro
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_type_check_symbol(symbol)
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async def task(handler):
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resolved_symbol = _resolve(symbol, [str])
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code = _type_check_symbol(resolved_symbol)
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resolved_code = _resolve(code, [int])
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handler(EV_KEY, resolved_code, 1)
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await self._trigger_release_event.wait()
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handler(EV_KEY, resolved_code, 0)
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self.tasks.append(task)
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if isinstance(macro, Macro):
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# repeat the macro forever while the key is held down
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async def task(handler):
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while self.is_holding():
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# run the child macro completely to avoid
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# not-releasing any key
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await macro.run(handler)
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await asyncio.sleep(
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1 / 1000
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) # give some other code a chance to run
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self.tasks.append(task)
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self.child_macros.append(macro)
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def add_modify(self, modifier, macro):
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"""Do stuff while a modifier is activated.
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Parameters
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----------
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modifier : str
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macro : Macro
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"""
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_type_check(macro, [Macro], "modify", 2)
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_type_check_symbol(modifier)
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self.child_macros.append(macro)
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async def task(handler):
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# TODO test var
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resolved_modifier = _resolve(modifier, [str])
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code = _type_check_symbol(resolved_modifier)
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handler(EV_KEY, code, 1)
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await self._keycode_pause()
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await macro.run(handler)
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handler(EV_KEY, code, 0)
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await self._keycode_pause()
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self.tasks.append(task)
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def add_hold_keys(self, *symbols):
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"""Hold down multiple keys, equivalent to `a + b + c + ...`."""
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for symbol in symbols:
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_type_check_symbol(symbol)
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async def task(handler):
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resolved_symbols = [_resolve(symbol, [str]) for symbol in symbols]
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codes = [_type_check_symbol(symbol) for symbol in resolved_symbols]
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for code in codes:
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handler(EV_KEY, code, 1)
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await self._keycode_pause()
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await self._trigger_release_event.wait()
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for code in codes[::-1]:
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handler(EV_KEY, code, 0)
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await self._keycode_pause()
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self.tasks.append(task)
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def add_repeat(self, repeats, macro):
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"""Repeat actions.
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Parameters
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----------
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repeats : int or Macro
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macro : Macro
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"""
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repeats = _type_check(repeats, [int], "repeat", 1)
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_type_check(macro, [Macro], "repeat", 2)
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async def task(handler):
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for _ in range(_resolve(repeats, [int])):
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await macro.run(handler)
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self.tasks.append(task)
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self.child_macros.append(macro)
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def add_event(self, type_, code, value):
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"""Write any event.
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Parameters
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----------
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type_: str or int
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examples: 2, 'EV_KEY'
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code : str or int
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examples: 52, 'KEY_A'
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value : int
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"""
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type_ = _type_check(type_, [int, str], "event", 1)
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code = _type_check(code, [int, str], "event", 2)
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value = _type_check(value, [int, str], "event", 3)
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if isinstance(type_, str):
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type_ = ecodes[type_.upper()]
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if isinstance(code, str):
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code = ecodes[code.upper()]
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self.tasks.append(lambda handler: handler(type_, code, value))
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self.tasks.append(self._keycode_pause)
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def add_mouse(self, direction, speed):
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"""Move the mouse cursor."""
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_type_check(direction, [str], "mouse", 1)
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speed = _type_check(speed, [int], "mouse", 2)
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code, value = {
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"up": (REL_Y, -1),
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"down": (REL_Y, 1),
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"left": (REL_X, -1),
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"right": (REL_X, 1),
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}[direction.lower()]
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async def task(handler):
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resolved_speed = value * _resolve(speed, [int])
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while self.is_holding():
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handler(EV_REL, code, resolved_speed)
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await asyncio.sleep(1 / self.mapping.rate)
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self.tasks.append(task)
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def add_wheel(self, direction, speed):
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"""Move the scroll wheel."""
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_type_check(direction, [str], "wheel", 1)
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speed = _type_check(speed, [int], "wheel", 2)
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code, value = {
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"up": ([REL_WHEEL, REL_WHEEL_HI_RES], [1 / 120, 1]),
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"down": ([REL_WHEEL, REL_WHEEL_HI_RES], [-1 / 120, -1]),
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"left": ([REL_HWHEEL, REL_HWHEEL_HI_RES], [1 / 120, 1]),
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"right": ([REL_HWHEEL, REL_HWHEEL_HI_RES], [-1 / 120, -1]),
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}[direction.lower()]
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async def task(handler):
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resolved_speed = _resolve(speed, [int])
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remainder = [0.0, 0.0]
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while self.is_holding():
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for i in range(0, 2):
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float_value = value[i] * resolved_speed + remainder[i]
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remainder[i] = math.fmod(float_value, 1)
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if abs(float_value) >= 1:
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handler(EV_REL, code[i], int(float_value))
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await asyncio.sleep(1 / self.mapping.rate)
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self.tasks.append(task)
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def add_wait(self, time):
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"""Wait time in milliseconds."""
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time = _type_check(time, [int, float], "wait", 1)
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async def task(_):
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await asyncio.sleep(_resolve(time, [int, float]) / 1000)
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self.tasks.append(task)
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def add_set(self, variable, value):
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"""Set a variable to a certain value."""
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_type_check_variablename(variable)
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async def task(_):
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# can also copy with set(a, $b)
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resolved_value = _resolve(value)
|
|
logger.debug('"%s" set to "%s"', variable, resolved_value)
|
|
macro_variables[variable] = value
|
|
|
|
self.tasks.append(task)
|
|
|
|
def add_add(self, variable, value):
|
|
"""Add a number to a variable."""
|
|
_type_check_variablename(variable)
|
|
|
|
async def task(_):
|
|
current = macro_variables[variable]
|
|
if current is None:
|
|
logger.debug('"%s" initialized with 0', variable)
|
|
macro_variables[variable] = 0
|
|
current = 0
|
|
|
|
resolved_value = _resolve(value)
|
|
if not isinstance(resolved_value, (int, float)):
|
|
logger.error('Expected delta "%s" to be a number', resolved_value)
|
|
return
|
|
|
|
if not isinstance(current, (int, float)):
|
|
logger.error(
|
|
'Expected variable "%s" to contain a number, but got "%s"',
|
|
variable,
|
|
current,
|
|
)
|
|
return
|
|
|
|
logger.debug('"%s" += "%s"', variable, resolved_value)
|
|
macro_variables[variable] += value
|
|
|
|
self.tasks.append(task)
|
|
|
|
def add_ifeq(self, variable, value, then=None, else_=None):
|
|
"""Old version of if_eq, kept for compatibility reasons.
|
|
|
|
This can't support a comparison like ifeq("foo", $blub) with blub containing
|
|
"foo" without breaking old functionality, because "foo" is treated as a
|
|
variable name.
|
|
"""
|
|
_type_check(then, [Macro, None], "ifeq", 3)
|
|
_type_check(else_, [Macro, None], "ifeq", 4)
|
|
|
|
async def task(handler):
|
|
set_value = macro_variables.get(variable)
|
|
logger.debug('"%s" is "%s"', variable, set_value)
|
|
if set_value == value:
|
|
if then is not None:
|
|
await then.run(handler)
|
|
elif else_ is not None:
|
|
await else_.run(handler)
|
|
|
|
if isinstance(then, Macro):
|
|
self.child_macros.append(then)
|
|
if isinstance(else_, Macro):
|
|
self.child_macros.append(else_)
|
|
|
|
self.tasks.append(task)
|
|
|
|
def add_if_eq(self, value_1, value_2, then=None, else_=None):
|
|
"""Compare two values."""
|
|
_type_check(then, [Macro, None], "if_eq", 3)
|
|
_type_check(else_, [Macro, None], "if_eq", 4)
|
|
|
|
async def task(handler):
|
|
resolved_value_1 = _resolve(value_1)
|
|
resolved_value_2 = _resolve(value_2)
|
|
if resolved_value_1 == resolved_value_2:
|
|
if then is not None:
|
|
await then.run(handler)
|
|
elif else_ is not None:
|
|
await else_.run(handler)
|
|
|
|
if isinstance(then, Macro):
|
|
self.child_macros.append(then)
|
|
if isinstance(else_, Macro):
|
|
self.child_macros.append(else_)
|
|
|
|
self.tasks.append(task)
|
|
|
|
def add_if_tap(self, then=None, else_=None, timeout=300):
|
|
"""If a key was pressed quickly.
|
|
|
|
macro key pressed -> if_tap starts -> key released -> then
|
|
|
|
macro key pressed -> released (does other stuff in the meantime)
|
|
-> if_tap starts -> pressed -> released -> then
|
|
"""
|
|
_type_check(then, [Macro, None], "if_tap", 1)
|
|
_type_check(else_, [Macro, None], "if_tap", 2)
|
|
timeout = _type_check(timeout, [int, float], "if_tap", 3)
|
|
|
|
if isinstance(then, Macro):
|
|
self.child_macros.append(then)
|
|
if isinstance(else_, Macro):
|
|
self.child_macros.append(else_)
|
|
|
|
async def wait():
|
|
"""Wait for a release, or if nothing pressed yet, a press and release."""
|
|
if self.is_holding():
|
|
await self._trigger_release_event.wait()
|
|
else:
|
|
await self._trigger_press_event.wait()
|
|
await self._trigger_release_event.wait()
|
|
|
|
async def task(handler):
|
|
resolved_timeout = _resolve(timeout, [int, float]) / 1000
|
|
try:
|
|
await asyncio.wait_for(wait(), resolved_timeout)
|
|
if then:
|
|
await then.run(handler)
|
|
except asyncio.TimeoutError:
|
|
if else_:
|
|
await else_.run(handler)
|
|
|
|
self.tasks.append(task)
|
|
|
|
def add_if_single(self, then, else_, timeout=None):
|
|
"""If a key was pressed without combining it."""
|
|
_type_check(then, [Macro, None], "if_single", 1)
|
|
_type_check(else_, [Macro, None], "if_single", 2)
|
|
|
|
if isinstance(then, Macro):
|
|
self.child_macros.append(then)
|
|
if isinstance(else_, Macro):
|
|
self.child_macros.append(else_)
|
|
|
|
async def task(handler):
|
|
listener_done = asyncio.Event()
|
|
|
|
async def listener(event):
|
|
if event.type != EV_KEY:
|
|
# ignore anything that is not a key
|
|
return
|
|
|
|
if event.value == 1:
|
|
# another key was pressed, trigger else
|
|
listener_done.set()
|
|
return
|
|
|
|
self.context.listeners.add(listener)
|
|
|
|
resolved_timeout = _resolve(timeout, allowed_types=[int, float, None])
|
|
await asyncio.wait(
|
|
[listener_done.wait(), self._trigger_release_event.wait()],
|
|
timeout=resolved_timeout / 1000 if resolved_timeout else None,
|
|
return_when=asyncio.FIRST_COMPLETED,
|
|
)
|
|
|
|
self.context.listeners.remove(listener)
|
|
|
|
if not listener_done.is_set() and self._trigger_release_event.is_set():
|
|
await then.run(handler) # was trigger release
|
|
else:
|
|
await else_.run(handler)
|
|
|
|
self.tasks.append(task)
|