L'autre jour, j'écrivais en Python le processus d'attente d'une application dans l'environnement X pour ouvrir un fichier, mais je me demandais pourquoi ce serait une bonne idée de démarrer plusieurs fois wmctrl -l pour obtenir le titre de la fenêtre. J'ai pensé, alors j'ai essayé d'écrire quelque chose comme ça en utilisant le module pyglet tout en lisant la source de wmctrl.
C'est un code merdique, mais il est fourni sous une licence BSD à deux clauses, alors n'hésitez pas à l'utiliser si vous le trouvez utile.
wmctrl.py
#!/usr/bin/env python3
# vim:fileencoding=utf-8
# Copyright (c) 2014 Masami HIRATA <[email protected]>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
__all__ = ["WMCtrl"]
from ctypes import (POINTER,
byref,
cast,
c_buffer,
c_char_p,
c_int,
c_ubyte,
c_ulong,
memmove,
pointer,
sizeof)
from pyglet.window.xlib import xlib
from pyglet.compat import asbytes
X_TRUE = xlib.True_
X_FALSE = xlib.False_
X_SUCCESS = xlib.Success
MAX_PROPERTY_VALUE_LEN = 4096
# from X11/Xatom.h
XA_CARDINAL = 6
XA_STRING = 31
XA_WINDOW = 33
class WMCtrl:
def __init__(self):
self.display = xlib.XOpenDisplay(None)
self.root = xlib.XDefaultRootWindow(self.display)
self.xatom_net_wm_name = self.get_xatom("_NET_WM_NAME")
def get_xatom(self, name, exists=False):
only_if_exists = X_TRUE if exists else X_FALSE
xatom = xlib.XInternAtom(self.display,
asbytes(name),
only_if_exists)
return xatom
def get_property(self, window, xatom_property_type, property_name):
return_xatom_property_type = xlib.Atom()
return_c_int_format = c_int()
return_c_ulong_nitems = c_ulong()
return_c_ulong_bytes_after = c_ulong()
return_c_ubyte_p_property_orig = pointer(c_ubyte())
if window is None:
window = self.root
xatom_property_name = self.get_xatom(property_name, exists=True)
if xatom_property_name == 0:
return None
status = xlib.XGetWindowProperty(self.display,
window,
xatom_property_name,
0,
MAX_PROPERTY_VALUE_LEN // 4,
X_FALSE,
xatom_property_type,
byref(return_xatom_property_type),
byref(return_c_int_format),
byref(return_c_ulong_nitems),
byref(return_c_ulong_bytes_after),
byref(return_c_ubyte_p_property_orig))
if status != X_SUCCESS:
print("Can't get {} property. ({})",
property_name,
status)
if xatom_property_type != return_xatom_property_type.value:
print("Invalid type of {} property. ({} != {})".format(
property_name,
xatom_property_type,
return_xatom_property_type.value))
xlib.XFree(return_c_ubyte_p_property_orig)
return None
bytes_per_item = return_c_int_format.value // 8
if bytes_per_item == 4:
bytes_per_item = sizeof(c_ulong)
property_size = (bytes_per_item * return_c_ulong_nitems.value)
# +1 is for NUL termination
return_c_char_p_property = c_buffer(property_size + 1)
memmove(return_c_char_p_property,
return_c_ubyte_p_property_orig,
property_size)
xlib.XFree(return_c_ubyte_p_property_orig)
return return_c_char_p_property
def get_window_list(self):
c_window_p_client_list = self.get_property(self.root,
XA_WINDOW,
"_NET_CLIENT_LIST")
if c_window_p_client_list is None:
c_window_p_client_list = self.get_property(self.root,
XA_CARDINAL,
"_WIN_CLIENT_LIST")
if c_window_p_client_list is None:
print("Can't get _(NET|WIN)_CLIENT_LIST property.")
return []
nitems = (len(c_window_p_client_list) - 1) // sizeof(xlib.Window)
c_window_p_client_list = cast(c_window_p_client_list,
POINTER(xlib.Window * nitems))
window_list = []
for window in c_window_p_client_list.contents:
window_list.append(window)
return window_list
def get_window_title(self, window):
text_property = xlib.XTextProperty()
status = xlib.XGetTextProperty(self.display,
window,
text_property,
self.xatom_net_wm_name)
if status == 0 or text_property.nitems < 1 or text_property.value == 0:
status = xlib.XGetWMName(self.display, window, text_property)
if status == 0 or text_property.nitems < 1 or text_property.value == 0:
return None
c_char_ppp_title = pointer(pointer(c_char_p()))
c_int_p_count = pointer(c_int())
xlib.XmbTextPropertyToTextList(self.display,
text_property,
c_char_ppp_title,
c_int_p_count)
if c_int_p_count.contents.value < 1:
return None
return c_char_ppp_title.contents.contents.value.decode('utf-8')
def get_window_titles(self):
titles = []
for window in self.get_window_list():
title = self.get_window_title(window)
if title is None:
continue
titles.append(title)
return titles
def main():
titles = WMCtrl().get_window_titles()
for title in titles:
print(title)
if __name__ == '__main__': # pragma: nocover
main()
Recommended Posts