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.
In some cases (e.g. using x2x) the previous model broke, with a window ending
not counting down to 0 anymore. Special treatment for NotifyUngrab seems to
help here.
Current solution: If a NotifyGrab is to be sent ignore it. If a NotifyUngrab
enter is sent, only adjust the semaphore if it is on 0. Likewise, do the same
for a NotifyUngrab leave if the semaphore is on 1. This seems to work alright
so far.
This can happen if we check for a passive core grab and our device is a
floating slave device. Doesn't really change anything as SDs can't send core
events but it stops the server from segfaulting.
FixKeyState needs to be able to handle XI events, otherwise we get "impossible
keyboard events" on server zaps and other special key combos.
(cherry picked from commit 5ee409794e)
In some cases a button press may activate a passive core grab. If the client
owning the passive grab already has a core grab on another device, don't
actually activate it. Otherwise the client gets two simultaneous passive
core grabs, and may never ungrab the device again (only if the other grab uses
GrabModeSync).
Reproducable: fire up gnome-session, open up gnome-terminal. Click with the
ClientPointer onto the window decoration, then click with another pointer onto
an application icon in the panel. Drag the icon out, release the button and
voila - you just lost your second mouse.
This is a half-assed attempt at getting rid of some enter-leave problems. When
a grab is activated, the events didn't get sent before, leading to interesting
results. This commit papers over it but doesn't actually fix it properly. The
whole enter/leave (focusin/out) structure needs to be ripped out and changed
for multiple devices.
* dix/events.c, include/dix.h:
(UpdateSpriteForScreen): added this to update the mouse sprite context
when we switch from a pScreen to another.
* mi/mipointer.c:
(miPointerWarpCursor): as we are switching to a new pScreen,
don't forget to update the mouse sprite context.
Let the drivers only generate XI events and put those into the event queue.
When processing events, generate core events as needed. This fixes a number of
problems with XKB and the DIX in general.
The previous approach was to put core events and XI events as separate events
into the event queue. When being processed, the server had no knowledge of
them coming from the same device state change. Anything that would then change
the state of the device accordingly was in danger of changing it twice,
leading to some funny (i.e. not funny at all) results.
Emulating core events while processing XI events fixes this, there is only one
path that actually changes the device state now. Although we have to be
careful when replaying events from synced devices, otherwise we may lose
events.
Note: XI has precedence over core for passive grabs, but core events are
delivered to the client first.
This removes the wrapping added in 340911d724
We need it unconditionally in a few places, and the rest checked for NULL and
then set it to VCK anyway. So, fixing up all callers to appreciate the defined
return value.
GenericEvents can't be parsed to keyButtonPointer, and there's no guarantee
that it has a time field anyway. PlayReleasedEvent needs to store the millis
when we know it (core events, XI event) and just re-use them for GenericEvents.
Yes, this is a hack. But it looks like the time has zero significance anyway.
The device state needs to be changed while processing the XI event. Core
events are always processed after XI, so by then the device is already set up
properly. However, we now rely on DeviceButtonMotionMask to be equal to
ButtonMotionMask. It already is, but stick a big fat warning in so nobody
attempts to change it.
This commit disables XKB for the VCK, thus essentially for all devices.
Temporarily anyway.
delivery of events to windows and clients.
This is tentative. It's likely that an additional last-resort hook will
be necessary for code that calls TryClientEvents or WriteEventsToClient
directly. It's also possible that new xace machinery will be necessary
to classify events and pull useful resource ID's out of them.
The failure case also needs some thinking through. Should event delivery
"succeed" or should it report undeliverable?
Finally, XKB appears to call WriteToClient to pass events. Sigh.
We shouldn't be able to restrict events like Expose, etc. with device based
ACLs. So we just ignore all non-input events when checking for permissions.
A passive core grab doesn't specify the device, and is thus created with the
ClientPointer as device. When this grab is activated later, don't actually
activate the grab on the grab device, but rather change the device to the one
that caused the grab to activate. Same procedure for keyboards.
Makes core apps _A LOT_ more useable and reduces the need to set the
ClientPointer.
Only applies to core grabs!
We need to do this to update the sprites x/y coordinate before we assemble a
button event. Absolute devices may send a buttonEvent with valuators attached.
If we don't update the sprite before assembling the event, the valuators are
lost and the button press is delivered to the previous position of the device.
Doesn't have any effect on relative devices.
We need this to allow extensions to fill in extra data for an event before it
is sent to the client. This is probably to be used like
FillUpEventsFromWindow().
This is definitely necessary in CheckDeviceGrabAndHintWindow (thanks to Paulo
Zanoni for spotting it). We're resetting it everywhere else too, just to be
save.
Device drivers flush their buttons on device init and cause a button down
event to be generated. If we unconditionally decrease the buttons, we won't be
able to ever get a passive device grab.
Format documentation for CheckDeviceGrabs to make it readable.
(cherry picked from commit 3e894974cd)
Conflicts:
Xi/exevents.c
Is set when passive grab is implicit as result of a ButtonPress event. If this
is the case, we need to store the XI mask as well as the core mask to ensure
delivery of XI events during the grab's lifetime.
Remove all core grabs on other devices when client issues a GrabPointer or
GrabKeyboard request. Let's assume that the client really only wants one
device to interact, so this seems like a reasonable solution.
Device drivers flush their buttons on device init and cause a button down
event to be generated. If we unconditionally decrease the buttons, we won't be
able to ever get a passive device grab.
Format documentation for CheckDeviceGrabs to make it readable.
This quickfixes event delivery problems with XI events when a grab was on.
deviceMask is only used when the grab was from a ButtonPress to preserve
potential XI event masks.
This is not an ideal solution but it works until I have time to work on
PassiveGrabs.
Add XGE handling in DeliverGrabbedEvent.
We can now grab something selecting XGE events, but the current code is a
bit messy and doesn't work too well yet.
Add RawDeviceEvent (pointers only for now).
This commit changes the event queue to use EventLists instead of xEvent
arrays. Only EQ is affected, event delivery still uses xEvent* (look for
comment in mieqProcessInputEvent).
RawDeviceEvents deliver driver information to the client, without clipping or
acceleration.
If we don't do this, a device that is paired before a sprite has been
initialized for the paired device will not actually get the right sprite and
segfault the server on focus events. Happens for the VCK.
This adds (unconditional) support for the GE extension. Anything from now on
that sends events in MPX will have to use the GE extension. No GE, no MPX
events. GE is not actually used yet from anywhere with this commit.
You will need to update x11proto, xextproto, libX11, libXext and xcb to the
matching xge branches. Things will _NOT_ work without the updated protocol
headers and libraries.
Requires moving the spriteTrace into the DeviceIntRec and adjusting a few
functions to take in device argument, most notably XYToWindow().
Cursor rendering on the second screen is busted.
arbitrary X status codes instead of just TRUE/FALSE.
The dix layer in most cases still does not propagate the return value of
XACE hooks back to the client, however. There is more error propagation
work to do.
Core enter/leave events with detail Notify{Ancestor|Inferior|Nonlinear} are
only sent for the first/last pointer to enter/leave. Events with detail
Notify{Nonlinear}Virtual are sent at all times, but not to those windows that
currently have one or more pointers inside their boundaries.
Send EnterNotify when first device enters the window, LeaveNotify when the
last device leaves the window. Additional devices will not cause additional
Enter/LeaveNotifies.
Calloc cursor struct to ensure devPrivates are zeroed out and don't
increase the refcnt for devices automatically when allocating a new
cursor. Use new DeviceIsPointerType() to detect if device is a pointer
_before_ device has been activated and can thus be identified and set
up grab functions accordingly. This way we can increase the refcnt
when we get a pointer grab.
The former <X11/extensions/XKBsrv.h> has been pulled into the server now as
include/xkbsrv.h, and the world updated to look for it in the new place,
since it made no sense to define server API in an extension header. Any
further work along this line will need to do similar things with XKBgeom.h
and friends.
EnableDevice.
zero out spriteTrace, otherwise GetCurrentRootWindow() may return
invalid data.
Evdev adds previously hotplugged devices on its own when rescanning,
and ActivateDevice does not get called for those devices. Sprites need
to be initialized or paired before the device gets started, so the
safest place to do so is EnableDevice (which actually does get called
by the evdev driver).
dix: IsPointerDevice and IsKeyboardDevice, use same ways to identify type
of device as XI does for the XListInputDevices reply.
Autopair each non-pointer device with VCP when activating, pair with
real device after activation.
Don't return non-keyboard devices when calling GetPairedKeyboard or
PickKeyboard, otherwise we segfault for 'evdev brain'.
state field in the event, rather than using the virtual devices.
ProcessPointerEvent: name argument "device" instead of "other".
Add GetPairedKeyboard().
otherwise a Xi grab may overwrite or release a core grab.
Replace grab and associates with coreGrab and deviceGrab structures,
adjust rest of dix/Xi/etc to compile.
xfree86: Don't check for core devices, we'll have the virtual ones anyway.
If we check, the first mouse device is duplicated and sends
double events.
dix: set coreGrab flag for grabs caused by GrabPointer and button presses.
remove virtual core devices from device list, only real devices are in
the list now.
Auto-pair each keyboard with a real pointer if one is available,
provides multiple keyboards automatically after startup if devices
are configured.
fix GuessFreePointerDevice() to do what it's supposed to do.
mi: fix: call miPointerMove from miPointerWarpCursor.
fix: remove unused id field from miCursorInfoRec
don't update sprite for virtual core pointer.
ambiguious request. PickPointer and PickKeyboard are used for getting
the appropriate pointer when situation is unclear.
Fix some issues with InitializeSprite.
dix, xfree86: Remove last traces of InitSprite.
Free sprite struct if a spriteOwner is paired.
xfree86: Use PairDevices instead of passing booleans around when creating a
sprite.
Xext: Switch back to using LookupPointer/KeyboardDevice instead of
inputInfo.xyz.
Adding PointerKeyboardPairingChanged event
Correct error values for XWarpDevicePointer
dix: Adding device argument to SendMappingNotify
Adding spriteOwner flag to devices
Some renaming and cleaning up in extinit.c
MPXLastEvent added
Xi: ShouldFreeInputMask() from XI is not static any more, used in mpx
dix: GetPointerEvents() allocates MPX event for MPX devices.
DeliverDeviceEvents() caters for MPX devices.
bugfix: uninitialized pPointer in miPointerGetPosition ifndef MPX
adding DeviceIntPtr parameter to ScreenRec's cursor functions.
cleanup of miPointer code to use same scheme in each function
dix: MPHasCursor() function determines checking whether to invoke
cursor rendering.
animcur: adding DeviceIntPtr parameter to cursor functions but animcur relies
on the core pointer right now.
xfixes: adding DeviceIntPtr parameter to cursor functions but xfixes relies on
the core pointer right now.
rac: adding DeviceIntPtr parameter to cursor functions but RAC relies on
the core pointer right now.
ramdac: adding DeviceIntPtr parameter to cursor functions but ramdac relies on
the core pointer right now.
fixed miSpriteRealize to use passed pDev argument instead of looping.
dix: changed sprite dependency and added MPX functionality to parts of
events.c (XineramaChangeToCursor, XineramaCheckPhysLimits,
XineramaConstrainCursor)
Xi: fix: accessing other->buttons for keyboard segfaulted the server
mi: core pointer was checked twice in miSpriteReportDamage,
miSpriteInstallColormap, miSpriteStoreColors, miSpriteSaveDoomedAreas
and miSpriteRealiseCursor
using damage bug (see comment in file) to avoid artefacts
added SpriteRecs for MPX devices
changed sprite dependency and added MPX functionality to parts
of events.c (ConfineToShape, PostNewCursor, XineramaCheckMotion,
CheckMotion, XineramaChangeToCursor, ChangeToCursor, CheckPhysLimits,
PointerConfinedToScreen)
added DeviceIntRec param to GetSpritePosition(). This required some
minor changes in ddx, xtest, xkb and xfixes.
mi: changed miPointer to pointer instead of static struct.
added miCursorInfoRec to contain info of the MPX cursors.
calling miUpdatePointerSprite() from event queue for MPX devices.
adding device-specific processing to miPointer*() functions.
dix: Call to SetCursorPosition in CheckMotion() temporarily disabled.
xfree86/common: call to miPointerUpdateSprite() disabled, is done from the EQ
NOTE: This build will not display cursor images.
BUG: The second mouse does to take correct x coordinates.
With Xinerama support built into the X server but not in use,
sprite.screen is NULL and yet the SyntheticMotion
macro would dereference it. Avoid that by just passing sprite.screen
to PostSyntheticMotion which can then dereference it when Xinerama is
enabled.
Also, define PostSyntheticMotion in dixevents.h and include dixevents.h in
getevents.c
