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270 lines
8.2 KiB
Python
270 lines
8.2 KiB
Python
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# key-mapper - GUI for device specific keyboard mappings
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# Copyright (C) 2021 sezanzeb <proxima@sezanzeb.de>
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#
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# This file is part of key-mapper.
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#
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# key-mapper 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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# key-mapper 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 key-mapper. If not, see <https://www.gnu.org/licenses/>.
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"""Store which presets should be enabled for which device on login."""
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import os
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import json
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import copy
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from keymapper.paths import CONFIG_PATH, USER, touch
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from keymapper.logger import logger
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MOUSE = 'mouse'
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WHEEL = 'wheel'
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BUTTONS = 'buttons'
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NONE = 'none'
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INITIAL_CONFIG = {
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'autoload': {},
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'macros': {
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# some time between keystrokes might be required for them to be
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# detected properly in software.
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'keystroke_sleep_ms': 10
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},
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'gamepad': {
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'joystick': {
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# very small movements of the joystick should result in very
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# small mouse movements. With a non_linearity of 1 it is
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# impossible/hard to even find a resting position that won't
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# move the cursor.
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'non_linearity': 4,
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'pointer_speed': 80,
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'left_purpose': MOUSE,
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'right_purpose': WHEEL,
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'x_scroll_speed': 2,
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'y_scroll_speed': 0.5
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},
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}
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}
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class ConfigBase:
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"""Base class for config objects.
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Loading and saving is optional and handled by classes that derive from
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this base.
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"""
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def __init__(self, fallback=None):
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"""Set up the needed members to turn your object into a config.
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Parameters
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----------
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fallback : ConfigBase
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a configuration that contains fallback default configs, if your
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object doesn't configure a certain key.
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"""
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self._config = {}
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self.fallback = fallback
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def _resolve(self, path, func, config=None):
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"""Call func for the given config value.
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Parameters
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----------
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config : dict
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The dictionary to search. Defaults to self._config.
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"""
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chunks = path.copy() if isinstance(path, list) else path.split('.')
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if config is None:
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child = self._config
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else:
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child = config
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while True:
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chunk = chunks.pop(0)
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parent = child
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child = child.get(chunk)
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if len(chunks) == 0:
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# child is the value _resolve is looking for
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return func(parent, child, chunk)
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# child is another object
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if child is None:
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parent[chunk] = {}
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child = parent[chunk]
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def remove(self, path):
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"""Remove a config key.
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Parameters
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----------
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path : string or string[]
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For example 'macros.keystroke_sleep_ms'
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"""
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def callback(parent, child, chunk):
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if child is not None:
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del parent[chunk]
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self._resolve(path, callback)
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def set(self, path, value):
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"""Set a config key.
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Parameters
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----------
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path : string or string[]
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For example 'macros.keystroke_sleep_ms'
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or ['macros', 'keystroke_sleep_ms']
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value : any
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"""
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logger.info(
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'Changing "%s" to "%s" in %s',
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path, value, self.__class__.__name__
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)
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def callback(parent, child, chunk):
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parent[chunk] = value
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self._resolve(path, callback)
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def get(self, path, log_unknown=True):
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"""Get a config value. If not set, return the default
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Parameters
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----------
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path : string or string[]
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For example 'macros.keystroke_sleep_ms'
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log_unknown : bool
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If True, write an error if `path` does not exist in the config
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"""
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def callback(parent, child, chunk):
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return child
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resolved = self._resolve(path, callback)
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if resolved is None and self.fallback is not None:
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resolved = self.fallback._resolve(path, callback)
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if resolved is None:
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resolved = self._resolve(path, callback, INITIAL_CONFIG)
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if resolved is None and log_unknown:
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logger.error('Unknown config key "%s"', path)
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# modifications are only allowed via set
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return copy.deepcopy(resolved)
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def clear_config(self):
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"""Remove all configurations in memory."""
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self._config = {}
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class GlobalConfig(ConfigBase):
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"""Global default configuration.
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It can also contain some extra stuff not relevant for presets, like the
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autoload stuff. If presets have a config key set, it will ignore
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the default global configuration for that one. If none of the configs
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have the key set, a hardcoded default value will be used.
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"""
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def __init__(self):
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self.path = os.path.join(CONFIG_PATH, 'config.json')
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# migrate from < 0.4.0, add the .json ending
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deprecated_path = os.path.join(CONFIG_PATH, 'config')
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if os.path.exists(deprecated_path) and not os.path.exists(self.path):
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logger.info('Moving "%s" to "%s"', deprecated_path, self.path)
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os.rename(os.path.join(CONFIG_PATH, 'config'), self.path)
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super().__init__()
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self.load_config()
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def set_autoload_preset(self, device, preset):
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"""Set a preset to be automatically applied on start.
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Parameters
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----------
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device : string
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preset : string or None
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if None, don't autoload something for this device.
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"""
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if preset is not None:
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self.set(['autoload', device], preset)
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else:
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logger.info(
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'Not injecting for "%s" automatically anmore',
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device
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)
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self.remove(['autoload', device])
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def iterate_autoload_presets(self):
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"""Get tuples of (device, preset)."""
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return self._config.get('autoload', {}).items()
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def is_autoloaded(self, device, preset):
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"""Should this preset be loaded automatically?"""
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return self.get(['autoload', device], log_unknown=False) == preset
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def load_config(self, path=None):
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"""Load the config from the file system.
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Parameters
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----------
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path : string or None
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If set, will change the path to load from and save to.
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"""
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if path is not None:
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if not os.path.exists(path):
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logger.error('Config at "%s" not found', path)
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return
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self.path = path
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self.clear_config()
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if not os.path.exists(self.path):
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# treated like an empty config
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logger.debug('Config "%s" doesn\'t exist yet', self.path)
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self.clear_config()
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self._config = copy.deepcopy(INITIAL_CONFIG)
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self.save_config()
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return
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with open(self.path, 'r') as file:
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try:
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self._config.update(json.load(file))
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logger.info('Loaded config from "%s"', self.path)
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except json.decoder.JSONDecodeError as error:
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logger.error(
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'Failed to parse config "%s": %s. Using defaults',
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self.path, str(error)
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)
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# uses the default configuration when the config object
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# is empty automatically
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def save_config(self):
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"""Save the config to the file system."""
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if USER == 'root':
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logger.debug('Skipping config file creation for the root user')
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return
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touch(self.path)
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with open(self.path, 'w') as file:
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json.dump(self._config, file, indent=4)
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logger.info('Saved config to %s', self.path)
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file.write('\n')
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config = GlobalConfig()
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