This fixes a severe issue - when the client died the event mask didn't get
unregistered and a future event would dereference dangling pointers. By
storing the event masks in the resource system we can free them when the
client dies.
Dereferencing into dev->valuator could crash the server, although it looks
like I could only reproduce this by having a keyboard send an event after it
was created and the WM was still replaying. Or so.
device->button->down used to be a 32-byte bitmask with one bit for each
button. This has changed into a 256-byte array, with one byte assigned for
each button. Some of the callers were still using this array as a bitmask
however, this is fixed with this patch.
Thanks to Keith Packard for pointing this out. See also:
http://lists.freedesktop.org/archives/xorg/2008-June/036202.html
RealizeCursor should be called when the cursor is allocated. However, when the
root cursor is allocated, no devices exist yet, and thus RealizeCursor is
never called. This may lead to segfaults lateron in DDXes like Xnest that
actually need to do something for each cursor, and lateron rely on that
DDX-specific data for each cursor has been initialized.
Instead of a simple counter, use bits to keep track of which device is where
etc. When device enters a window (or sets focus), the bit matching the device
is set, when it leaves again, it is unset. If there are 0 bits set, then
Leave/Enter/Focus events may be sent to the client.
Same theory as before, but this should get around the insanity with
Grab/Ungrab special cases. Those cases are basically untested though.
If an pointer event is being processed during a device grab, don't deliver it
to the focus window, even if the device has a focus class. Reason being that
some pointers may have a focus class, thus killing drag-and-drop.
Add Prox events to the if-clauses with the other events
that are usually sent from the input devices.
Ensure that the event deliverers won't try to deliver
events of type '0' (some extended events doesn't have
an equivalent core-type)
Small modification by Peter Hutterer.
Signed-off-by: Peter Hutterer <peter@cs.unisa.edu.au>
The latter is used to increase the amount of allocated memory for the event
list. This will be needed for ClassesChangedEvents that can be of more or less
arbitrary size (larger than 32 anyway).
Rather than letting the DDX allocate the events, allocate them once in the DIX
and just pass it around when needed.
DDX should call GetEventList() to obtain this list and then pass it into
Get{Pointer|Keyboard}Events.
The correct thing would be to return the ClientPointer. However, if the client
for some reason has a core grab on another device (e.g. as result of a passive
grab), return the coordinates of the grabbed device instead.
This makes the use of nautilus a bit saner.
If the window being changed is set as the motion hint window for any device,
the device's motion hint window is set to NULL. Which is kinda what the old
code did, except that it did it with only the VCP.
This is a significant shift in how input events are perceived. The common
approach was to treat a core event as a different entity than the XI event.
This could result in the XI event being delivered to a different client than
the core event. This doesn't work nicely if they come from the same device.
Instead, we treat an input event as a single event, that is delivered through
two separate APIs. So when delivering an event, we first try the XI event,
then the core event. If the window want's neither, we go to the parent and
repeat. Once either core or XI has been delivered, the processing stops.
Important: Different to the previous method, if a client registers for core
button events, the parent window will not get XI events. This should only
cause problems when you're mixing core and XI events, so don't do that!
Generic events don't fit into this yet, they cause me headaches.
This should restore the correct passive grab processing. When checking for
passive grabs, the core event is emulated and we check first for XI grabs on
the window, then for core grabs. Regardless of which event activates the grab,
the XI event is stored in the device's EQ.
When replaying the event, we take the XI event and replay it on the next
window, again including the emulation of the core event.
If we have one global filter, one pointer may change the filter value and
affect another pointer.
Reproduceable effect:
blackbox and xterm, start dragging xterm then click anywhere with the other
pointer (attached to different masterd device!). The button release resets
the filter[Motion_Filter(button)] value, thus stopping dragging and no event
is sent to the client anymore.
Having the filters set per device gets around this.
Søren Sandmann
Peter Hutterer
Peter Hutterer
Michel Dänzer
Jeremy Huddleston
Magnus Vigerlöf
Peter Hutterer