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core.py
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core.py
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import re
import os, fcntl
from collections import namedtuple
import logging
from select import select
from Xlib import X, Xatom
from Xlib.error import BadWindow
import Xlib.display
from Xlib.XK import string_to_keysym, load_keysym_group
from Xlib.protocol.event import ClientMessage
from .xext import screen_saver
MODIFICATORS = {
'Alt': X.Mod1Mask,
'Control': X.ControlMask,
'Ctrl': X.ControlMask,
'Shift': X.ShiftMask,
'Win': X.Mod4Mask,
'Mod': X.Mod4Mask,
}
IGNORED_MOD_MASKS = (0, X.LockMask, X.Mod2Mask, X.LockMask | X.Mod2Mask)
load_keysym_group('xf86')
WindowState = namedtuple('State', 'maximized_vert, maximized_horz, undecorated, urgent')
'''Window state
Has following attributes:
maximized_vert
Is window maximized vertically.
maximized_horz
Is window maximized horizontally.
undecorated
Is window does not have decorations (openbox specific state).
urgent
Is window demands attention.
'''
class RestartException(Exception): pass
class WM(object):
"""Core orcsome instance
Can be get in any time as::
import orcsome
wm = orcsome.get_wm()
"""
def __init__(self):
self.rfifo, self.wfifo = os.pipe()
fl = fcntl.fcntl(self.rfifo, fcntl.F_GETFL)
fcntl.fcntl(self.rfifo, fcntl.F_SETFL, fl | os.O_NONBLOCK)
self.key_handlers = {}
self.property_handlers = {}
self.create_handlers = []
self.destroy_handlers = {}
self.init_handlers = []
self.deinit_handlers = []
self.signal_handlers = {}
self.grab_keyboard_handler = None
self.grab_pointer_handler = None
self.focus_history = []
self.re_cache = {}
self.dpy = Xlib.display.Display()
self.root = self.dpy.screen().root
screen_saver.init(self.dpy)
def emit(self, signal):
os.write(self.wfifo, signal + '\n')
def keycode(self, key):
sym = string_to_keysym(key)
if sym is X.NoSymbol:
logging.getLogger(__name__).error('Invalid key [%s]' % key)
return None
return self.dpy.keysym_to_keycode(sym)
def bind_key(self, window, keydef):
parts = keydef.split('+')
mod, key = parts[:-1], parts[-1]
modmask = 0
for m in mod:
try:
modmask |= MODIFICATORS[m]
except KeyError:
logging.getLogger(__name__).error('Invalid key [%s]' % keydef)
return lambda func: func
sym = string_to_keysym(key)
if sym is X.NoSymbol:
logging.getLogger(__name__).error('Invalid key [%s]' % keydef)
return lambda func: func
code = self.dpy.keysym_to_keycode(sym)
def inner(func):
keys = []
wid = window.id
for imask in IGNORED_MOD_MASKS:
mask = modmask | imask
window.grab_key(code, mask, True, X.GrabModeAsync, X.GrabModeAsync)
self.key_handlers.setdefault(window.id, {})[(mask, code)] = func
keys.append((mask, code))
def remove():
for k in keys:
del self.key_handlers[wid][k]
func.remove = remove
return func
return inner
def on_key(self, *args):
"""Signal decorator to define hotkey
You can define global key::
wm.on_key('Alt+Return')(
spawn('xterm'))
Or key binded to specific window::
@wm.on_create(cls='URxvt')
def bind_urxvt_keys():
# Custom key to close only urxvt windows
wm.on_key(wm.event_window, 'Ctrl+d')(
close)
Key defenition is a string in format ``[mod + ... +]keysym`` where ``mod`` is
one of modificators [Alt, Shift, Control(Ctrl), Mod(Win)] and
``keysym`` is a key name.
"""
if getattr(args[0], 'id', False):
window = args[0]
key = args[1]
else:
window = self.root
key = args[0]
return self.bind_key(window, key)
def on_create(self, *args, **matchers):
"""Signal decorator to handle window creation
Can be used in two forms. Listen to any window creation::
@wm.on_create
def debug(wm):
print wm.event_window.get_wm_class()
Or specific window::
@wm.on_create(cls='Opera')
def use_firefox_luke(wm):
wm.close_window(wm.event_window)
spawn('firefox')()
Also, orcsome calls on_create handlers on its startup.
You can check ``wm.startup`` attribute to denote such event.
See :meth:`is_match` for ``**matchers`` argument description.
"""
if args:
func = args[0]
self.create_handlers.append(func)
def remove():
self.create_handlers.remove(func)
func.remove = remove
return func
def inner(func):
def match_window():
if self.is_match(self.event_window, **matchers):
func()
self.create_handlers.append(match_window)
def remove():
self.create_handlers.remove(match_window)
func.remove = remove
return func
return inner
def on_destroy(self, window):
"""Signal decorator to handle window destroy"""
def inner(func):
self.destroy_handlers.setdefault(window.id, []).append(func)
return func
return inner
def on_property_change(self, *args):
"""Signal decorator to handle window property change
One can handle any window property change::
@wm.on_property_change('_NET_WM_STATE')
def window_maximized_state_change():
state = wm.get_window_state(wm.event_window)
if state.maximized_vert and state.maximized_horz:
print 'Look, ma! Window is maximized now!'
And specific window::
@wm.on_create
def switch_to_desktop():
if not wm.startup:
if wm.activate_window_desktop(wm.event_window) is None:
# Created window has no any attached desktop so wait for it
@wm.on_property_change(wm.event_window, '_NET_WM_DESKTOP')
def property_was_set():
wm.activate_window_desktop(wm.event_window)
property_was_set.remove()
"""
def inner(func):
if getattr(args[0], 'id', False):
wid = args[0].id
props = args[1:]
else:
wid = None
props = args
for p in props:
atom = self.get_atom(p)
self.property_handlers.setdefault(atom, {}).setdefault(wid, []).append(func)
def remove():
for p in props:
atom = self.get_atom(p)
self.property_handlers[atom][wid].remove(func)
func.remove = remove
return func
return inner
def get_clients(self):
"""Return wm client list"""
result = []
wids = self.root.get_full_property(self.get_atom('_NET_CLIENT_LIST'), Xatom.WINDOW)
if wids:
for wid in wids.value:
result.append(self.dpy.create_resource_object('window', wid))
return result
def get_stacked_clients(self):
"""Return client list in stacked order.
Most top window will be last in list. Can be useful to determine window visibility.
"""
result = []
wids = self.root.get_full_property(
self.get_atom('_NET_CLIENT_LIST_STACKING'), Xatom.WINDOW)
if wids:
for wid in wids.value:
result.append(self.dpy.create_resource_object('window', wid))
return result
@property
def current_window(self):
"""Return currently active (with input focus) window"""
result = self.root.get_full_property(self.get_atom('_NET_ACTIVE_WINDOW'), Xatom.WINDOW)
if result:
return self.dpy.create_resource_object('window', result.value[0])
return None
@property
def current_desktop(self):
"""Return current desktop number
Counts from zero.
"""
return self.root.get_full_property(
self.dpy.intern_atom('_NET_CURRENT_DESKTOP'), 0).value[0]
def get_window_desktop(self, window):
"""Return window desktop.
Result is:
* number from 0 to desktop_count - 1
* -1 if window placed on all desktops
* None if window does not have desktop property
"""
d = self.get_window_property_safe(window, '_NET_WM_DESKTOP', 0)
if d:
d = d.value[0]
if d == 0xffffffff:
return -1
else:
return d
return None
def set_current_desktop(self, num):
"""Activate desktop ``num``"""
if num < 0:
return
self._send_event(self.root, self.dpy.intern_atom('_NET_CURRENT_DESKTOP'), [num])
self.dpy.flush()
def _send_event(self, window, ctype, data, mask=None):
data = (data + ([0] * (5 - len(data))))[:5]
ev = ClientMessage(window=window, client_type=ctype, data=(32, (data)))
self.root.send_event(ev, event_mask=X.SubstructureRedirectMask)
def get_window_role(self, window):
"""Return WM_WINDOW_ROLE property"""
d = self.get_window_property_safe(window, 'WM_WINDOW_ROLE', Xatom.STRING)
if d is None or d.format != 8:
return None
else:
return d.value
def get_window_title(self, window):
"""Return _NET_WM_NAME property"""
d = self.get_window_property_safe(window, '_NET_WM_NAME', self.get_atom('UTF8_STRING'))
if d is None or d.format != 8:
return None
else:
return d.value
def match_string(self, pattern, data):
if not data:
return False
try:
r = self.re_cache[pattern]
except KeyError:
r = self.re_cache[pattern] = re.compile(pattern)
return r.match(data)
def is_match(self, window, name=None, cls=None, role=None, desktop=None, title=None):
"""Check if window suits given matchers.
Matchers keyword arguments are used in :meth:`on_create`,
:func:`~orcsome.actions.spawn_or_raise`. :meth:`find_clients` and
:meth:`find_client`.
name
window name (also referenced as `instance`).
The first part of ``WM_CLASS`` property.
cls
window class. The second part of ``WM_CLASS`` property.
role
window role. Value of ``WM_WINDOW_ROLE`` property.
desktop
matches windows placed on specific desktop. Must be int.
title
window title.
`name`, `cls`, `title` and `role` can be regular expressions.
"""
match = True
try:
wname, wclass = window.get_wm_class()
except TypeError:
wname = wclass = None
if match and name:
match = self.match_string(name, wname)
if match and cls:
match = self.match_string(cls, wclass)
if match and role:
match = self.match_string(role, self.get_window_role(window))
if match and title:
match = self.match_string(title, self.get_window_title(window))
if match and desktop is not None:
wd = self.get_window_desktop(window)
match = wd == desktop
return match
def find_clients(self, clients, **matchers):
"""Return matching clients list
:param clients: window list returned by :meth:`get_clients` or :meth:`get_stacked_clients`.
:param \*\*matchers: keyword arguments defined in :meth:`is_match`
"""
result = []
for c in clients:
if self.is_match(c, **matchers):
result.append(c)
return result
def find_client(self, clients, **matchers):
"""Return first matching client
:param clients: window list returned by :meth:`get_clients` or :meth:`get_stacked_clients`.
:param \*\*matchers: keyword arguments defined in :meth:`is_match`
"""
result = self.find_clients(clients, **matchers)
try:
return result[0]
except IndexError:
return None
def process_create_window(self, window):
window.change_attributes(event_mask=X.StructureNotifyMask |
X.PropertyChangeMask | X.FocusChangeMask)
self.event_window = window
for handler in self.create_handlers:
handler()
def run(self):
self.root.change_attributes(event_mask=X.SubstructureNotifyMask)
for h in self.init_handlers:
h()
self.startup = True
for c in self.get_clients():
self.process_create_window(c)
def handle_keypress(self, event):
if self.grab_keyboard_handler:
self.grab_keyboard_handler(True, event.state, event.detail)
else:
try:
handler = self.key_handlers[event.window.id][(event.state, event.detail)]
except KeyError:
pass
else:
self.event = event
self.event_window = event.window
handler()
def handle_keyrelease(self, event):
if self.grab_keyboard_handler:
self.grab_keyboard_handler(False, event.state, event.detail)
def handle_create(self, event):
self.event = event
self.startup = False
self.process_create_window(event.window)
def handle_destroy(self, event):
try:
handlers = self.destroy_handlers[event.window.id]
except KeyError:
pass
else:
self.event = event
self.event_window = event.window
for h in handlers:
h()
finally:
self._clean_window_data(event.window)
def handle_property(self, event):
atom = event.atom
if event.state == 0 and atom in self.property_handlers:
wphandlers = self.property_handlers[atom]
self.event_window = event.window
self.event = event
if event.window.id in wphandlers:
for h in wphandlers[event.window.id]:
h()
if None in wphandlers:
for h in wphandlers[None]:
h()
def handle_focusin(self, event):
try:
self.focus_history.remove(event.window)
except ValueError:
pass
self.focus_history.append(event.window)
def handle_events(self):
handlers = {
X.KeyPress: self.handle_keypress,
X.KeyRelease: self.handle_keyrelease,
X.CreateNotify: self.handle_create,
X.DestroyNotify: self.handle_destroy,
X.FocusIn: self.handle_focusin,
X.PropertyNotify: self.handle_property,
}
while True:
try:
readable, _, _ = select([self.dpy, self.rfifo], [], [])
except KeyboardInterrupt:
return True
if not readable:
continue
if self.dpy in readable:
while True:
try:
i = self.dpy.pending_events()
except KeyboardInterrupt:
return True
if not i:
break
while i > 0:
event = self.dpy.next_event()
i = i - 1
try:
h = handlers[event.type]
except KeyError:
continue
try:
h(event)
except (KeyboardInterrupt, SystemExit):
return True
except RestartException:
return False
except:
import logging
logging.getLogger(__name__).exception('Boo')
if self.rfifo in readable:
for s in os.read(self.rfifo, 8192).splitlines():
if s in self.signal_handlers:
for h in self.signal_handlers[s]:
try:
h()
except (KeyboardInterrupt, SystemExit):
return True
except RestartException:
return False
except:
import logging
logging.getLogger(__name__).exception('Boo')
def _clean_window_data(self, window):
wid = window.id
if wid in self.key_handlers:
del self.key_handlers[wid]
if wid in self.destroy_handlers:
self.destroy_handlers[wid]
try:
self.focus_history.remove(window)
except ValueError:
pass
for atom, whandlers in self.property_handlers.items():
if wid in whandlers:
del whandlers[wid]
if not self.property_handlers[atom]:
del self.property_handlers[atom]
def focus_window(self, window):
"""Activate window"""
self._send_event(window, self.get_atom("_NET_ACTIVE_WINDOW"), [2, X.CurrentTime])
self.dpy.flush()
def focus_and_raise(self, window):
"""Activate window desktop, set input focus and raise it"""
self.activate_window_desktop(window)
window.configure(stack_mode=X.Above)
self.focus_window(window)
def place_window_above(self, window):
"""Float up window in wm stack"""
window.configure(stack_mode=X.Above)
self.dpy.flush()
def place_window_below(self, window):
"""Float down window in wm stack"""
window.configure(stack_mode=X.Below)
self.dpy.flush()
def activate_window_desktop(self, window):
"""Activate window desktop
Return:
* True if window is placed on different from current desktop
* False if window desktop is the same
* None if window does not have desktop property
"""
wd = self.get_window_desktop(window)
if wd is not None:
if self.current_desktop != wd:
self.set_current_desktop(wd)
return True
else:
return False
else:
return None
def get_atom(self, atom_name):
"""Return atom value"""
return self.dpy.get_atom(atom_name)
def get_atom_name(self, atom):
"""Return atom string representation"""
return self.dpy.get_atom_name(atom)
def get_window_state(self, window):
"""Return :class:`WindowState` instance"""
state = self.get_window_property_safe(window, '_NET_WM_STATE', Xatom.ATOM)
return WindowState(
state and self.get_atom('_NET_WM_STATE_MAXIMIZED_VERT') in state.value,
state and self.get_atom('_NET_WM_STATE_MAXIMIZED_HORZ') in state.value,
state and self.get_atom('_OB_WM_STATE_UNDECORATED') in state.value,
state and self.get_atom('_NET_WM_STATE_DEMANDS_ATTENTION') in state.value,
)
def decorate_window(self, window, decorate=True):
"""Decorate/undecorate window
:param decorate: undecorate window if False
.. note::
Openbox specific.
"""
state_atom = self.get_atom('_NET_WM_STATE')
undecorated_atom = self.get_atom('_OB_WM_STATE_UNDECORATED')
self._send_event(window, state_atom, [int(not decorate), undecorated_atom])
self.dpy.flush()
def close_window(self, window):
"""Send request to wm to close window"""
self._send_event(window, self.get_atom("_NET_CLOSE_WINDOW"), [X.CurrentTime])
self.dpy.flush()
def change_window_desktop(self, window, desktop):
"""Move window to ``desktop``"""
if desktop < 0:
return
self._send_event(window, self.get_atom("_NET_WM_DESKTOP"), [desktop])
self.dpy.flush()
def stop(self, is_exit=False):
self.key_handlers.clear()
self.property_handlers.clear()
self.create_handlers[:] = []
self.destroy_handlers.clear()
self.focus_history[:] = []
self.signal_handlers.clear()
if not is_exit:
self.root.ungrab_key(X.AnyKey, X.AnyModifier)
for c in self.get_clients():
c.ungrab_key(X.AnyKey, X.AnyModifier)
for h in self.deinit_handlers:
try:
h()
except:
logging.getLogger(__name__).exception('Shutdown error')
self.init_handlers[:] = []
self.deinit_handlers[:] = []
def grab_keyboard(self, func):
if self.grab_keyboard_handler:
return False
result = self.root.grab_keyboard(False, X.GrabModeAsync, X.GrabModeAsync, X.CurrentTime)
if result == 0:
self.grab_keyboard_handler = func
return True
return False
def ungrab_keyboard(self):
self.grab_keyboard_handler = None
self.dpy.ungrab_keyboard(X.CurrentTime)
def grab_pointer(self, func, mask=None):
if self.grab_pointer_handler:
return False
result = self.root.grab_pointer(False, 0, X.GrabModeAsync, X.GrabModeAsync,
X.NONE, X.NONE, X.CurrentTime)
if result == 0:
self.grab_pointer_handler = func
return True
return False
def ungrab_pointer(self):
self.grab_pointer_handler = None
self.dpy.ungrab_pointer(X.CurrentTime)
def on_init(self, func):
self.init_handlers.append(func)
return func
def on_deinit(self, func):
self.deinit_handlers.append(func)
return func
def on_signal(self, signal):
def inner(func):
self.signal_handlers.setdefault(signal, []).append(func)
def remove():
self.signal_handlers[signal].remove(func)
func.remove = remove
return func
return inner
def get_window_property_safe(self, window, atom_name, ptype):
try:
return window.get_full_property(self.get_atom(atom_name), ptype)
except BadWindow:
return None
class TestWM(object):
def on_key(self, key):
assert isinstance(key, basestring), 'First argument to on_key must be string'
return lambda func: func
def on_create(self, *args, **matchers):
assert matchers or args
if args:
assert len(args) == 1
return args[0]
if matchers:
possible_args = set(('cls', 'role', 'name', 'desktop'))
assert possible_args.union(matchers) == possible_args, \
'Invalid matcher, must be one of %s' % possible_args
return lambda func: func
def on_property_change(self, *args):
assert all(isinstance(r, basestring) for r in args)
return lambda func: func
def on_destroy(self, window):
return lambda func: func
def on_init(self, func):
return func
def on_deinit(self, func):
return func