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MetaStackTracker: Avoid queueing resync for obvious no-ops

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Since we can't distinguish a ConfigureEvent that indicates a raise
from a ConfigureEvent that indicates a move, we get lots of
STACK_OP_RAISE_ABOVE events for windows that are already in the
right place in the stacking order. Avoid queueing a restack in that
case.

https://bugzilla.gnome.org/show_bug.cgi?id=634771
This commit is contained in:
Owen W. Taylor 2010-11-13 14:07:07 -05:00
parent 8b24711bba
commit f372fa29b2
1 changed files with 15 additions and 8 deletions
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23
src/core/stack-tracker.c
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@ -54,8 +54,8 @@
*
* When we receive a new event: a) we compare the serial in the event to
* the serial of the queued requests and remove any that are now
* no longer pending b) drop the predicted stacking order to recompute
* it at the next opportunity.
* no longer pending b) if necessary, drop the predicted stacking
* order to recompute it at the next opportunity.
*
* Possible optimizations:
* Keep the stacks as an array + reverse-mapping hash table to avoid
@ -505,6 +505,8 @@ static void
stack_tracker_event_received (MetaStackTracker *tracker,
MetaStackOp *op)
{
gboolean need_sync = FALSE;
meta_stack_op_dump (op, "Stack op event received: ", "\n");
if (op->any.serial < tracker->server_serial)
@ -512,7 +514,8 @@ stack_tracker_event_received (MetaStackTracker *tracker,
tracker->server_serial = op->any.serial;
meta_stack_op_apply (op, tracker->server_stack);
if (meta_stack_op_apply (op, tracker->server_stack))
need_sync = TRUE;
while (tracker->queued_requests->head)
{
@ -522,17 +525,21 @@ stack_tracker_event_received (MetaStackTracker *tracker,
g_queue_pop_head (tracker->queued_requests);
meta_stack_op_free (queued_op);
need_sync = TRUE;
}
if (tracker->predicted_stack)
if (need_sync)
{
g_array_free (tracker->predicted_stack, TRUE);
tracker->predicted_stack = NULL;
if (tracker->predicted_stack)
{
g_array_free (tracker->predicted_stack, TRUE);
tracker->predicted_stack = NULL;
}
meta_stack_tracker_queue_sync_stack (tracker);
}
meta_stack_tracker_dump (tracker);
meta_stack_tracker_queue_sync_stack (tracker);
}
void