button->down used inconsistently

[Peter Hutterer]

On Sat, Jun 14, 2008 at 01:31:58PM -0700, Keith Packard wrote:
> Some parts of the server use button->down as a bitmask, other parts use
> it as a per-button down count. It seems like using it consistently as a
> bitmask would match the keyboard behaviour nicely. Also, lots of the
> server already uses this as a bitmask, so changing that would be a lot
> more invasive.

Please have a look at this patch. It's basically the inverse of your previous,
fixing up all other instances of button->down usage, assembling the bitmasks
as needed (through SetBitIf macro).
This allows us to keep the counter on the button->down, but also reply with
the correct state (as bitmask) in events.

Cheers,
  Peter
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