#!/usr/bin/python3 # -*- coding: utf-8 -*- # key-mapper - GUI for device specific keyboard mappings # Copyright (C) 2020 sezanzeb # # 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 . """Store which presets should be enabled for which device on login.""" import os import sys import json import shutil from keymapper.paths import CONFIG_PATH, USER, touch from keymapper.logger import logger MOUSE = 'mouse' WHEEL = 'wheel' INITIAL_CONFIG = { 'autoload': {}, 'macros': { # some time between keystrokes might be required for them to be # detected properly in software. 'keystroke_sleep_ms': 10 }, 'gamepad': { 'joystick': { # very small movements of the joystick should result in very # small mouse movements. With a non_linearity of 1 it is # impossible/hard to even find a resting position that won't # move the cursor. 'non_linearity': 4, 'pointer_speed': 80, 'left_purpose': MOUSE, 'right_purpose': WHEEL, 'x_scroll_speed': 2, 'y_scroll_speed': 0.5 }, } } class ConfigBase: """Base class for config objects. Loading and saving is optional and handled by classes that derive from this base. """ def __init__(self, fallback=None): """Set up the needed members to turn your object into a config. Parameters ---------- fallback : ConfigBase a configuration that contains fallback default configs, if your object doesn't configure a certain key. """ self._config = {} self.fallback = fallback def _resolve(self, path, func, config=None): """Call func for the given config value. Parameters ---------- config : dict The dictionary to search. Defaults to self._config. """ chunks = path.split('.') if config is None: child = self._config else: child = config while True: chunk = chunks.pop(0) parent = child child = child.get(chunk) if len(chunks) == 0: # child is the value _resolve is looking for return func(parent, child, chunk) # child is another object if child is None: parent[chunk] = {} child = parent[chunk] def remove(self, path): """Remove a config key. Parameters ---------- path : string For example 'macros.keystroke_sleep_ms' """ def callback(parent, child, chunk): if child is not None: del parent[chunk] self._resolve(path, callback) def set(self, path, value): """Set a config key. Parameters ---------- path : string For example 'macros.keystroke_sleep_ms' value : any """ logger.debug( 'Changing "%s" to "%s" in %s', path, value, self.__class__.__name__ ) def callback(parent, child, chunk): parent[chunk] = value self._resolve(path, callback) def get(self, path, log_unknown=True): """Get a config value. If not set, return the default Parameters ---------- path : string For example 'macros.keystroke_sleep_ms' log_unknown : bool If True, write an error if `path` does not exist in the config """ def callback(parent, child, chunk): return child resolved = self._resolve(path, callback) if resolved is None and self.fallback is not None: resolved = self.fallback._resolve(path, callback) if resolved is None: resolved = self._resolve(path, callback, INITIAL_CONFIG) if resolved is None and log_unknown: logger.error('Unknown config key "%s"', path) return resolved def clear_config(self): """Remove all configurations in memory.""" self._config = {} class GlobalConfig(ConfigBase): """Global default configuration. It can also contain some extra stuff not relevant for presets, like the autoload stuff. If presets have a config key set, it will ignore the default global configuration for that one. If none of the configs have the key set, a hardcoded default value will be used. """ def __init__(self): self.path = os.path.join(CONFIG_PATH, 'config.json') # migrate from < 0.4.0, add the .json ending deprecated_path = os.path.join(CONFIG_PATH, 'config') if os.path.exists(deprecated_path) and not os.path.exists(self.path): logger.info('Moving "%s" to "%s"', deprecated_path, self.path) os.rename(os.path.join(CONFIG_PATH, 'config'), self.path) super().__init__() self.load_config() def set_autoload_preset(self, device, preset): """Set a preset to be automatically applied on start. Parameters ---------- device : string preset : string or None if None, don't autoload something for this device. """ if preset is not None: self.set(f'autoload.{device}', preset) else: logger.info( 'Not loading injecting for "%s" automatically anmore', device ) self.remove(f'autoload.{device}') def iterate_autoload_presets(self): """Get tuples of (device, preset).""" return self._config.get('autoload', {}).items() def is_autoloaded(self, device, preset): """Should this preset be loaded automatically?""" return self.get(f'autoload.{device}', log_unknown=False) == preset def load_config(self): """Load the config from the file system.""" self.clear_config() if not os.path.exists(self.path): # treated like an empty config logger.debug('Config "%s" doesn\'t exist yet', self.path) self.clear_config() self._config = INITIAL_CONFIG self.save_config() return with open(self.path, 'r') as file: try: self._config.update(json.load(file)) logger.info('Loaded config from "%s"', self.path) except json.decoder.JSONDecodeError as error: logger.error( 'Failed to parse config "%s": %s', self.path, str(error) ) sys.exit(1) def save_config(self): """Save the config to the file system.""" touch(self.path) with open(self.path, 'w') as file: json.dump(self._config, file, indent=4) logger.info('Saved config to %s', self.path) shutil.chown(self.path, USER, USER) file.write('\n') config = GlobalConfig()