On Wed, Jun 2, 2010 at 11:22 PM, David Hyatt <hy...@apple.com> wrote:

> I really don't think hit testing needs to be modified to get what you want.  
> You can do a scattershot sampling using multiple candidate points within the 
> rect and apply whatever heuristics you want to choose a node.  I'm also not 
> convinced that we should be complicating core hit testing code in this way, 
> since I suspect this is one of those areas where mobile platforms will each 
> want to do their own slightly different thing anyway.

The problem with hit testing by multisampling is that it is
ridiculously slow. You need to take at least a dozen samples for
decent results. With a complex document on a mobile platform doing
those can take several hundreds of milliseconds. That is pretty far
from what is needed for good responsiveness. I think area hit testing
would make a lot of sense.

With WebKit2 it might actually be a good idea to track all event
sensitive areas in the document. This way at least partial (no
hit/maybe hit) testing could be done entirely in the UI process side.


  antti

> dave
> (hy...@apple.com)
>
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