Desativa a tecla SUPER durante aplicativos em tela cheia

Question

Existe uma maneira de desativar a tecla SUPER durante sessões de jogos ou aplicativos de tela cheia em geral?

    

Answer 1

Introdução

O seguinte script desabilita a tecla Super se qualquer janela do X11 estiver no modo de tela cheia. Ele deve ser adicionado como um aplicativo de inicialização, mas também pode ser executado em um modo independente.

Uso

Para executar o script manualmente, basta:

python disable_super_key.py

Para fazer o script iniciar automaticamente após o login, consulte Como faço para iniciar aplicativos automaticamente no login?

Obtendo o código fonte do script

Pode-se copiar a fonte do script desta resposta ou obtê-la via clonagem do meu repositório GitHub .

Instruções para quem tem git :

1. cd /opt
2. sudo git clone https://github.com/SergKolo/sergrep.git
3. chmod -R +x sergrep

O script estará localizado em /opt/sergrep/disable_super_key.py

Código-fonte do script

#!/usr/bin/env python
#
###########################################################
# Author: Serg Kolo , contact: [email protected] 
# Date: August 1st , 2016
# Purpose: Disable Super key that calls Unity Dash, when any 
#          X11 window is in fullscreen state
# 
# Written for: https://askubuntu.com/q/805807/295286
# Tested on: Ubuntu 16.04 LTS 
###########################################################
# Copyright: Serg Kolo , 2016
#    
#     Permission to use, copy, modify, and distribute this software is hereby granted
#     without fee, provided that  the copyright notice above and this permission statement
#     appear in all copies.
#
#     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
#     THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#     DEALINGS IN THE SOFTWARE.
from __future__ import print_function
import gi
gi.require_version('Gdk', '3.0')
from gi.repository import  Gdk,Gio
import subprocess
import signal
import time
import sys

debug = False

def gsettings_get(schema,path,key):
    """ fetches value of gsettings schema"""
    if path is None:
        gsettings = Gio.Settings.new(schema)
    else:
        gsettings = Gio.Settings.new_with_path(schema,path)
    return gsettings.get_value(key)

def gsettings_set(schema,path,key,value):
    """ sets value of gsettings schema """
    if path is None:
        gsettings = Gio.Settings.new(schema)
    else:
        gsettings = Gio.Settings.new_with_path(schema,path)
    return gsettings.set_string(key,value)


def gsettings_reset(schema,path,key):
    """ resets schema:key value to default"""
    if path is None:
        gsettings = Gio.Settings.new(schema)
    else:
        gsettings = Gio.Settings.new_with_path(schema,path)
    return gsettings.reset(key)

def run_cmd(cmdlist):
    """ reusable function for running shell commands"""
    try:
        stdout = subprocess.check_output(cmdlist)
    except subprocess.CalledProcessError:
        pass
    else:
        if stdout:
            return stdout


def main():
    """ defines entry point of the program """
    screen = Gdk.Screen.get_default()
    while True:

        key_state = str(gsettings_get('org.compiz.unityshell', 
                                  '/org/compiz/profiles/unity/plugins/unityshell/', 
                                  'show-launcher'))
        active_xid = str(screen.get_active_window().get_xid())
        wm_state =  run_cmd( ['xprop', '-root', '-notype','-id',active_xid, '_NET_WM_STATE'])  

        if debug : print(key_state,wm_state)

        if 'FULLSCREEN' in wm_state:
            if "Super" in  key_state:    
                gsettings_set('org.compiz.unityshell', 
                              '/org/compiz/profiles/unity/plugins/unityshell/',
                              'show-launcher', 
                              'Disabled')

        else:
            if "Disabled" in key_state :
               gsettings_reset( 'org.compiz.unityshell', 
                                '/org/compiz/profiles/unity/plugins/unityshell/',
                                'show-launcher')


        time.sleep(0.25)


def sigterm_handler(*args):
    """ ensures that Super key has been reset upon exit"""
    gsettings_reset( 'org.compiz.unityshell', 
                     '/org/compiz/profiles/unity/plugins/unityshell/',
                     'show-launcher')

    if debug: print('CAUGHT SIGTERM')
    sys.exit(0)


if __name__ == "__main__":
    signal.signal(signal.SIGTERM,sigterm_handler)
    main()

Depuração

Caso a depuração seja necessária, altere a linha 32 de debug = False para debug = True e execute o script a partir da linha de comando