def _set_pixmap(self):
# The tricky part here is that the pixmap returned by
# NameWindowPixmap gets invalidated every time the window's
# viewable state changes. ("viewable" here is the X term that
# means "mapped, and all ancestors are also mapped".) But
# there is no X event that will tell you when a window's
# viewability changes! Instead we have to find all ancestors,
# and watch all of them for unmap and reparent events. But
# what about races? I hear you cry. By doing things in the
# exact order:
# 1) select for StructureNotify
# 2) QueryTree to get parent
# 3) repeat 1 & 2 up to the root
# 4) call NameWindowPixmap
# we are safe. (I think.)
listening = []
e = None
try:
screen = self.client_window.get_screen()
if not screen:
log("cannot set pixmap on client window - maybe deleted?")
return
root = screen.get_root_window()
gdkworld = None
world = get_world_window()
if world:
gdkworld = world.get_window()
win = get_parent(self.client_window)
while win not in (None, root,
gdkworld) and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
xid = win.get_xid()
X11Window.addXSelectInput(xid, StructureNotifyMask)
add_event_receiver(win, self, max_receivers=-1)
listening.append(win)
win = get_parent(win)
handle = XImage.get_xcomposite_pixmap(self.xid)
except Exception as e:
try:
self._cleanup_listening(listening)
except Exception:
pass
raise
if handle is None:
log("failed to name a window pixmap for %#x: %s", self.xid, e)
self._cleanup_listening(listening)
else:
self._contents_handle = handle
# Don't save the listening set until after
# NameWindowPixmap has succeeded, to maintain our
# invariant:
self._listening_to = listening
def set_pixmap():
# The tricky part here is that the pixmap returned by
# NameWindowPixmap gets invalidated every time the window's
# viewable state changes. ("viewable" here is the X term that
# means "mapped, and all ancestors are also mapped".) But
# there is no X event that will tell you when a window's
# viewability changes! Instead we have to find all ancestors,
# and watch all of them for unmap and reparent events. But
# what about races? I hear you cry. By doing things in the
# exact order:
# 1) select for StructureNotify
# 2) QueryTree to get parent
# 3) repeat 1 & 2 up to the root
# 4) call NameWindowPixmap
# we are safe. (I think.)
listening = []
e = None
try:
root = self._window.get_screen().get_root_window()
world = get_world_window().window
win = get_parent(self._window)
while win not in (None, root, world) and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
X11Window.addXSelectInput(win.xid, StructureNotifyMask)
add_event_receiver(win, self, max_receivers=-1)
listening.append(win)
win = get_parent(win)
handle = XImage.get_xcomposite_pixmap(self._window.xid)
except Exception as e:
try:
self._cleanup_listening(listening)
except:
pass
raise
if handle is None:
#avoid race during signal exit, which will clear self._window:
win = self._window
xid = 0
if win:
xid = win.xid
log("failed to name a window pixmap for %#x: %s", xid, e)
self._cleanup_listening(listening)
else:
self._contents_handle = handle
# Don't save the listening set until after
# NameWindowPixmap has succeeded, to maintain our
# invariant:
self._listening_to = listening
def do_setup_listening(self):
assert self._listening is None
add_event_receiver(self._window, self, max_receivers=-1)
self._listening = [self._window]
#recurse parents:
win = get_parent(self._window)
while win is not None and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
X11Window.addXSelectInput(get_xwindow(win), constants["StructureNotifyMask"])
add_event_receiver(win, self, max_receivers=-1)
self._listening.append(win)
win = get_parent(win)
debug("grab: listening for: %s", self._listening)
def set_pixmap():
# The tricky part here is that the pixmap returned by
# NameWindowPixmap gets invalidated every time the window's
# viewable state changes. ("viewable" here is the X term that
# means "mapped, and all ancestors are also mapped".) But
# there is no X event that will tell you when a window's
# viewability changes! Instead we have to find all ancestors,
# and watch all of them for unmap and reparent events. But
# what about races? I hear you cry. By doing things in the
# exact order:
# 1) select for StructureNotify
# 2) QueryTree to get parent
# 3) repeat 1 & 2 up to the root
# 4) call NameWindowPixmap
# we are safe. (I think.)
listening = []
e = None
try:
root = self._window.get_screen().get_root_window()
world = get_world_window().window
win = get_parent(self._window)
while win not in (None, root,
world) and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
X11Window.addXSelectInput(win.xid, StructureNotifyMask)
add_event_receiver(win, self, max_receivers=-1)
listening.append(win)
win = get_parent(win)
handle = XImage.get_xcomposite_pixmap(self._window.xid)
except Exception, e:
try:
self._cleanup_listening(listening)
except:
pass
raise
def do_setup_listening(self):
assert self._listening is None
add_event_receiver(self._window, self, max_receivers=-1)
self._listening = [self._window]
#recurse parents:
from xpra.x11.gtk_x11.world_window import get_world_window
root = self._window.get_screen().get_root_window()
world = get_world_window().window
win = get_parent(self._window)
while win not in (None, root, world) and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
X11Window.addXSelectInput(win.xid, StructureNotifyMask)
add_event_receiver(win, self, max_receivers=-1)
self._listening.append(win)
win = get_parent(win)
log("grab: listening for: %s", [hex(x.xid) for x in self._listening])
def do_setup_listening(self):
assert self._listening is None
add_event_receiver(self._window, self, max_receivers=-1)
self._listening = [self._window]
#recurse parents:
from xpra.x11.gtk_x11.world_window import get_world_window
root = self._window.get_screen().get_root_window()
world = get_world_window().window
win = get_parent(self._window)
while win not in (None, root, world) and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
X11Window.addXSelectInput(win.xid, StructureNotifyMask)
add_event_receiver(win, self, max_receivers=-1)
self._listening.append(win)
win = get_parent(win)
log("grab: listening for: %s", [hex(x.xid) for x in self._listening])
def set_pixmap():
# The tricky part here is that the pixmap returned by
# NameWindowPixmap gets invalidated every time the window's
# viewable state changes. ("viewable" here is the X term that
# means "mapped, and all ancestors are also mapped".) But
# there is no X event that will tell you when a window's
# viewability changes! Instead we have to find all ancestors,
# and watch all of them for unmap and reparent events. But
# what about races? I hear you cry. By doing things in the
# exact order:
# 1) select for StructureNotify
# 2) QueryTree to get parent
# 3) repeat 1 & 2 up to the root
# 4) call NameWindowPixmap
# we are safe. (I think.)
listening = []
e = None
try:
win = get_parent(self._window)
while win is not None and win.get_parent() is not None:
# We have to use a lowlevel function to manipulate the
# event selection here, because SubstructureRedirectMask
# does not roundtrip through the GDK event mask
# functions. So if we used them, here, we would clobber
# corral window selection masks, and those don't deserve
# clobbering. They are our friends! X is driving me
# slowly mad.
X11Window.addXSelectInput(get_xwindow(win), constants["StructureNotifyMask"])
add_event_receiver(win, self, max_receivers=-1)
listening.append(win)
win = get_parent(win)
handle = XImage.get_xcomposite_pixmap(get_xwindow(self._window))
except Exception, e:
try:
self._cleanup_listening(listening)
except:
pass
raise