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dix: add touch event history helper functions

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If touch client has not registered for ownership events and a grab above
that client is rejected, the client needs to receive the complete event
history.

The history currently doesn't really do fancy overflow handling. We assume
that the first TOUCH_HISTORY_SIZE events are the important ones and anything
after that is dropped. If that is a problem, fix the client that takes > 100
event to decide whether to accept or reject.

Events marked with TOUCH_CLIENT_ID or TOUCH_REPLAYING must not be stored in
the history, they are events created by the DIX to comply with the protocol.
Any such event should already be in the history anyway.

A fixme in this patch: we don't have a function to actually deliver the
event yet.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
This commit is contained in:
Peter Hutterer
2011-12-14 15:56:05 +10:00
parent b274c472a5
commit 40475261ea
2 changed files with 113 additions and 0 deletions
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4
include/input.h
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@@ -607,6 +607,10 @@ extern TouchPointInfoPtr TouchBeginTouch(DeviceIntPtr dev, int sourceid,
extern TouchPointInfoPtr TouchFindByClientID(DeviceIntPtr dev,
uint32_t client_id);
extern void TouchEndTouch(DeviceIntPtr dev, TouchPointInfoPtr ti);
extern Bool TouchEventHistoryAllocate(TouchPointInfoPtr ti);
extern void TouchEventHistoryFree(TouchPointInfoPtr ti);
extern void TouchEventHistoryPush(TouchPointInfoPtr ti, const DeviceEvent *ev);
extern void TouchEventHistoryReplay(TouchPointInfoPtr ti, DeviceIntPtr dev, XID resource);
/* misc event helpers */
extern Mask GetEventMask(DeviceIntPtr dev, xEvent* ev, InputClientsPtr clients);