bangs.py

#!usr/bin/python3.8

'''1. Core program'''
import json
import os
from pynput import keyboard

with open('settings.json', "r") as file:
    config = json.load(file)


def formatWithBangs(text):
    """Returns expanded version of `text`
    """
    for bang in config['bangs']:
        text = text.replace(bang, config['bangs'][bang])

    return text


def autoComplete(characterList):
    """
    Wrapper around formatWithBangs that
    1. Simulates a series of backspace presses to delete user-typed bangword
    2. Generates a str from `characterList` (bangWord)
    3. Types expanded version of `bangWord`
    """
    kbd = keyboard.Controller()

    bangWord = ''.join(characterList)
    expandedWord = formatWithBangs(bangWord)
    if not expandedWord == bangWord:
        for char in range(0, len(characterList)+1):  # Erase the bangword before typing the corresponding str
            kbd.press(keyboard.Key.backspace)
            kbd.release(keyboard.Key.backspace)
        kbd.type(expandedWord)

'''2. Keyboard shortcut handling'''
currentCharList = []
specialKeys = [specialKey for specialKey in keyboard.Key]


def on_press(key):
    global currentCharList

    if key not in specialKeys and not key == keyboard.Key.space:  # Check if: key is !, key follows !, key isn't a space
        currentCharList.append(str(key).strip("'"))  # Without this, key looks like this '"key"'

    elif key == keyboard.Key.space and currentCharList:
        print('Bang shortcut detected, formatting')
        placeHolderList = currentCharList
        currentCharList = []
        autoComplete(placeHolderList)


if __name__ == '__main__':
    with keyboard.Listener(on_press=on_press) as listener:
        listener.join()