[Webkit-unassigned] [Bug 128924] Shifted document touch handling in iframes on iOS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=128924





--- Comment #10 from Benjamin Poulain <benjamin at webkit.org>  2014-05-15 17:34:20 PST ---
(In reply to comment #9)
> > Are you adding a touch event handler on the root document even if there was none on the page? If you do, that is really really bad.
> 
> Oups! I totally forgot that Arty Gus' patch has introduced touch listeners. I thought that you're mentioning the case described in CKEditor's ticket. My fault.
> 
> So, yes. Indeed we add now a touchend listener, but on the document inside the iframe, not the main frame. Should we avoid this too?

That's ok.

It is not ideal to have the whole surface respond to touch event, but if it is limited to an iframe, that's not too bad.

The problem with touch event handlers is they are forcing the engine to block scrolling/pinching until the touch events are handled. When the page is not specifically designed for it, the interactions with the page become very laggy.

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